Mercurial > hg > toybox
annotate lib/lib.c @ 707:977e19296b3f
Update readlink so -f works. Add -menq while there.
author | Rob Landley <rob@landley.net> |
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date | Tue, 20 Nov 2012 09:21:52 -0600 |
parents | 078138791b5c |
children | 50d759f8b371 |
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1 /* lib.c - reusable stuff. |
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2 * |
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3 * Functions with the x prefix are wrappers for library functions. They either |
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4 * succeed or kill the program with an error message, but never return failure. |
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5 * They usually have the same arguments and return value as the function they |
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6 * wrap. |
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7 * |
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8 * Copyright 2006 Rob Landley <rob@landley.net> |
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9 */ |
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10 |
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11 #include "toys.h" |
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12 |
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13 // Strcpy with size checking: exit if there's not enough space for the string. |
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14 void xstrcpy(char *dest, char *src, size_t size) |
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15 { |
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16 if (strlen(src)+1 > size) error_exit("xstrcpy"); |
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17 strcpy(dest, src); |
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18 } |
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19 |
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20 void verror_msg(char *msg, int err, va_list va) |
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21 { |
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22 char *s = ": %s"; |
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23 |
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24 fprintf(stderr, "%s: ", toys.which->name); |
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25 if (msg) vfprintf(stderr, msg, va); |
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26 else s+=2; |
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27 if (err) fprintf(stderr, s, strerror(err)); |
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28 putc('\n', stderr); |
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29 } |
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30 |
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31 void error_msg(char *msg, ...) |
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32 { |
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33 va_list va; |
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34 |
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35 va_start(va, msg); |
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36 verror_msg(msg, 0, va); |
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37 va_end(va); |
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38 } |
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39 |
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40 void perror_msg(char *msg, ...) |
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41 { |
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42 va_list va; |
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43 |
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44 va_start(va, msg); |
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45 verror_msg(msg, errno, va); |
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46 va_end(va); |
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47 } |
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48 |
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49 // Die with an error message. |
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50 void error_exit(char *msg, ...) |
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51 { |
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52 va_list va; |
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53 |
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54 if (CFG_HELP && toys.exithelp) { |
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55 *toys.optargs=*toys.argv; |
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56 USE_HELP(help_main();) // dear gcc: shut up. |
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57 fprintf(stderr,"\n"); |
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58 } |
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59 |
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60 va_start(va, msg); |
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61 verror_msg(msg, 0, va); |
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62 va_end(va); |
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63 |
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64 if (!toys.exitval) toys.exitval++; |
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65 if (toys.rebound) longjmp(*toys.rebound, 1); |
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66 else exit(toys.exitval); |
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67 } |
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68 |
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69 |
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70 // Die with an error message and strerror(errno) |
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71 void perror_exit(char *msg, ...) |
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72 { |
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73 va_list va; |
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74 |
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75 va_start(va, msg); |
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76 verror_msg(msg, errno, va); |
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77 va_end(va); |
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78 |
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79 if (!toys.exitval) toys.exitval++; |
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80 if (toys.rebound) longjmp(*toys.rebound, 1); |
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81 else exit(toys.exitval); |
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82 } |
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83 |
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84 // Die unless we can allocate memory. |
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85 void *xmalloc(size_t size) |
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86 { |
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87 void *ret = malloc(size); |
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88 if (!ret) error_exit("xmalloc"); |
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89 |
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90 return ret; |
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91 } |
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92 |
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93 // Die unless we can allocate prezeroed memory. |
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94 void *xzalloc(size_t size) |
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95 { |
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96 void *ret = xmalloc(size); |
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97 memset(ret, 0, size); |
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98 return ret; |
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99 } |
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100 |
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101 // Die unless we can change the size of an existing allocation, possibly |
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102 // moving it. (Notice different arguments from libc function.) |
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103 void *xrealloc(void *ptr, size_t size) |
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104 { |
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105 ptr = realloc(ptr, size); |
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106 if (!ptr) error_exit("xrealloc"); |
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107 |
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108 return ptr; |
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109 } |
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110 |
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111 // Die unless we can allocate a copy of this many bytes of string. |
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112 char *xstrndup(char *s, size_t n) |
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113 { |
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114 char *ret = xmalloc(++n); |
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115 strncpy(ret, s, n); |
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116 ret[--n]=0; |
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117 |
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118 return ret; |
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119 } |
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120 |
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121 // Die unless we can allocate a copy of this string. |
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122 char *xstrdup(char *s) |
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123 { |
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124 return xstrndup(s, strlen(s)); |
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125 } |
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126 |
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127 // Die unless we can allocate enough space to sprintf() into. |
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128 char *xmsprintf(char *format, ...) |
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129 { |
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130 va_list va, va2; |
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131 int len; |
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132 char *ret; |
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133 |
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134 va_start(va, format); |
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135 va_copy(va2, va); |
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136 |
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137 // How long is it? |
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138 len = vsnprintf(0, 0, format, va); |
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139 len++; |
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140 va_end(va); |
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141 |
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142 // Allocate and do the sprintf() |
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143 ret = xmalloc(len); |
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144 vsnprintf(ret, len, format, va2); |
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145 va_end(va2); |
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146 |
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147 return ret; |
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148 } |
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149 |
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150 void xprintf(char *format, ...) |
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151 { |
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152 va_list va; |
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153 va_start(va, format); |
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154 |
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155 vprintf(format, va); |
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156 if (ferror(stdout)) perror_exit("write"); |
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157 } |
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158 |
128
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159 void xputs(char *s) |
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160 { |
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161 if (EOF == puts(s)) perror_exit("write"); |
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162 } |
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163 |
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164 void xputc(char c) |
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165 { |
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166 if (EOF == fputc(c, stdout) || fflush(stdout)) perror_exit("write"); |
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167 } |
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168 |
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169 void xflush(void) |
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170 { |
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171 if (fflush(stdout)) perror_exit("write");; |
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172 } |
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173 |
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174 // Die unless we can exec argv[] (or run builtin command). Note that anything |
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175 // with a path isn't a builtin, so /bin/sh won't match the builtin sh. |
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176 void xexec(char **argv) |
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177 { |
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178 toy_exec(argv); |
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179 execvp(argv[0], argv); |
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180 |
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181 perror_exit("exec %s", argv[0]); |
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182 } |
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183 |
51 | 184 void xaccess(char *path, int flags) |
185 { | |
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186 if (access(path, flags)) perror_exit("Can't access '%s'", path); |
51 | 187 } |
188 | |
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189 // Die unless we can delete a file. (File must exist to be deleted.) |
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190 void xunlink(char *path) |
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191 { |
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192 if (unlink(path)) perror_exit("unlink '%s'", path); |
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193 } |
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194 |
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195 // Die unless we can open/create a file, returning file descriptor. |
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196 int xcreate(char *path, int flags, int mode) |
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197 { |
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198 int fd = open(path, flags, mode); |
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199 if (fd == -1) perror_exit("%s", path); |
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200 return fd; |
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201 } |
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202 |
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203 // Die unless we can open a file, returning file descriptor. |
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204 int xopen(char *path, int flags) |
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205 { |
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206 return xcreate(path, flags, 0); |
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207 } |
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208 |
201
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209 void xclose(int fd) |
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210 { |
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211 if (close(fd)) perror_exit("xclose"); |
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212 } |
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213 |
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214 int xdup(int fd) |
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215 { |
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216 if (fd != -1) { |
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217 fd = dup(fd); |
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218 if (fd == -1) perror_exit("xdup"); |
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219 } |
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220 return fd; |
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221 } |
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222 |
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223 // Die unless we can open/create a file, returning FILE *. |
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224 FILE *xfopen(char *path, char *mode) |
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225 { |
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226 FILE *f = fopen(path, mode); |
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227 if (!f) perror_exit("No file %s", path); |
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228 return f; |
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229 } |
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230 |
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231 // Keep reading until full or EOF |
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232 ssize_t readall(int fd, void *buf, size_t len) |
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233 { |
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234 size_t count = 0; |
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235 |
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236 while (count<len) { |
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237 int i = read(fd, buf+count, len-count); |
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238 if (!i) break; |
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239 if (i<0) return i; |
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240 count += i; |
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241 } |
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242 |
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243 return count; |
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244 } |
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245 |
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246 // Keep writing until done or EOF |
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247 ssize_t writeall(int fd, void *buf, size_t len) |
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248 { |
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249 size_t count = 0; |
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250 while (count<len) { |
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251 int i = write(fd, buf+count, len-count); |
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252 if (i<1) return i; |
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253 count += i; |
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254 } |
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255 |
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256 return count; |
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257 } |
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258 |
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259 // Die if there's an error other than EOF. |
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260 size_t xread(int fd, void *buf, size_t len) |
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261 { |
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262 ssize_t ret = read(fd, buf, len); |
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263 if (ret < 0) perror_exit("xread"); |
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264 |
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265 return ret; |
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266 } |
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267 |
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268 void xreadall(int fd, void *buf, size_t len) |
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269 { |
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270 if (len != readall(fd, buf, len)) perror_exit("xreadall"); |
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271 } |
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272 |
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273 // There's no xwriteall(), just xwrite(). When we read, there may or may not |
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274 // be more data waiting. When we write, there is data and it had better go |
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275 // somewhere. |
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276 |
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277 void xwrite(int fd, void *buf, size_t len) |
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278 { |
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279 if (len != writeall(fd, buf, len)) perror_exit("xwrite"); |
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280 } |
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281 |
340 | 282 // Die if lseek fails, probably due to being called on a pipe. |
283 | |
284 off_t xlseek(int fd, off_t offset, int whence) | |
285 { | |
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286 offset = lseek(fd, offset, whence); |
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287 if (offset<0) perror_exit("lseek"); |
340 | 288 |
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289 return offset; |
340 | 290 } |
291 | |
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292 off_t lskip(int fd, off_t offset) |
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293 { |
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294 off_t and = lseek(fd, offset, SEEK_CUR); |
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295 |
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296 if (and != -1 && offset >= lseek(fd, offset, SEEK_END) |
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297 && offset+and == lseek(fd, offset+and, SEEK_SET)) return 0; |
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298 else { |
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299 char buf[4096]; |
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300 while (offset>0) { |
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301 int try = offset>sizeof(buf) ? sizeof(buf) : offset, or; |
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302 |
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303 or = readall(fd, buf, try); |
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304 if (or < 0) perror_msg("lskip to %lld", (long long)offset); |
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305 else offset -= try; |
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306 if (or < try) break; |
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307 } |
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308 |
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309 return offset; |
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310 } |
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311 } |
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312 |
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313 char *xgetcwd(void) |
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314 { |
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315 char *buf = getcwd(NULL, 0); |
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316 if (!buf) perror_exit("xgetcwd"); |
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317 |
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318 return buf; |
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319 } |
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320 |
95
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321 void xstat(char *path, struct stat *st) |
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322 { |
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323 if(stat(path, st)) perror_exit("Can't stat %s", path); |
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324 } |
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325 |
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326 // Cannonicalize path, even to file with one or more missing components at end |
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327 char *xabspath(char *path, unsigned missing) |
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328 { |
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329 char *apath, *temp, *slash; |
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330 int i=0; |
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331 |
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332 // If this isn't an absolute path, make it one with cwd. |
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333 if (path[0]!='/') { |
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334 char *temp=xgetcwd(); |
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335 apath = xmsprintf("%s/%s", temp, path); |
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336 free(temp); |
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337 } else apath = path; |
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338 slash = apath+strlen(apath); |
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339 |
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340 for (;;) { |
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341 temp = realpath(apath, NULL); |
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342 if (i) *slash = '/'; |
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343 if (temp || ++i > missing) break; |
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344 while (slash>apath) if (*--slash == '/') break; |
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345 *slash=0; |
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346 free(temp); |
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347 } |
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348 |
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349 if (i && temp) { |
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350 slash = xmsprintf("%s%s", temp, slash); |
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351 free(temp); |
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352 temp = slash; |
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353 } |
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354 |
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355 if (path != apath) free(apath); |
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356 return temp; |
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357 } |
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358 |
585
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359 // Resolve all symlinks, returning malloc() memory. |
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360 char *xrealpath(char *path) |
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361 { |
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362 char *new = realpath(path, NULL); |
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363 if (!new) perror_exit("realpath '%s'", path); |
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364 return new; |
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365 } |
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366 |
292
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367 void xchdir(char *path) |
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368 { |
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369 if (chdir(path)) error_exit("chdir '%s'", path); |
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370 } |
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371 |
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372 // Ensure entire path exists. |
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373 // If mode != -1 set permissions on newly created dirs. |
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374 // Requires that path string be writable (for temporary null terminators). |
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375 void xmkpath(char *path, int mode) |
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376 { |
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377 char *p, old; |
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378 mode_t mask; |
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379 int rc; |
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380 struct stat st; |
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381 |
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382 for (p = path; ; p++) { |
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383 if (!*p || *p == '/') { |
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384 old = *p; |
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385 *p = rc = 0; |
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386 if (stat(path, &st) || !S_ISDIR(st.st_mode)) { |
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387 if (mode != -1) { |
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388 mask=umask(0); |
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389 rc = mkdir(path, mode); |
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390 umask(mask); |
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391 } else rc = mkdir(path, 0777); |
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392 } |
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393 *p = old; |
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394 if(rc) perror_exit("mkpath '%s'", path); |
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395 } |
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396 if (!*p) break; |
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397 } |
216
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398 } |
370 | 399 |
400 // setuid() can fail (for example, too many processes belonging to that user), | |
401 // which opens a security hole if the process continues as the original user. | |
402 | |
403 void xsetuid(uid_t uid) | |
404 { | |
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405 if (setuid(uid)) perror_exit("xsetuid"); |
370 | 406 } |
407 | |
408 | |
20
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409 // Find all file in a colon-separated path with access type "type" (generally |
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410 // X_OK or R_OK). Returns a list of absolute paths to each file found, in |
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411 // order. |
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412 |
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413 struct string_list *find_in_path(char *path, char *filename) |
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414 { |
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415 struct string_list *rlist = NULL, **prlist=&rlist; |
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416 char *cwd = xgetcwd(); |
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417 |
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418 for (;;) { |
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419 char *next = path ? strchr(path, ':') : NULL; |
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420 int len = next ? next-path : strlen(path); |
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421 struct string_list *rnext; |
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422 struct stat st; |
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423 |
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424 rnext = xmalloc(sizeof(void *) + strlen(filename) |
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425 + (len ? len : strlen(cwd)) + 2); |
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426 if (!len) sprintf(rnext->str, "%s/%s", cwd, filename); |
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427 else { |
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428 char *res = rnext->str; |
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429 strncpy(res, path, len); |
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430 res += len; |
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431 *(res++) = '/'; |
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432 strcpy(res, filename); |
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433 } |
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434 |
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435 // Confirm it's not a directory. |
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436 if (!stat(rnext->str, &st) && S_ISREG(st.st_mode)) { |
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437 *prlist = rnext; |
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438 rnext->next = NULL; |
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439 prlist = &(rnext->next); |
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440 } else free(rnext); |
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441 |
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442 if (!next) break; |
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443 path += len; |
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444 path++; |
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445 } |
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446 free(cwd); |
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447 |
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448 return rlist; |
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449 } |
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450 |
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451 // Convert unsigned int to ascii, writing into supplied buffer. A truncated |
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452 // result contains the first few digits of the result ala strncpy, and is |
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453 // always null terminated (unless buflen is 0). |
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454 void utoa_to_buf(unsigned n, char *buf, unsigned buflen) |
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455 { |
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456 int i, out = 0; |
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457 |
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458 if (buflen) { |
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459 for (i=1000000000; i; i/=10) { |
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460 int res = n/i; |
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461 |
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462 if ((res || out || i == 1) && --buflen>0) { |
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463 out++; |
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464 n -= res*i; |
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465 *buf++ = '0' + res; |
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466 } |
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467 } |
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468 *buf = 0; |
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469 } |
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470 } |
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471 |
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472 // Convert signed integer to ascii, using utoa_to_buf() |
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473 void itoa_to_buf(int n, char *buf, unsigned buflen) |
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474 { |
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475 if (buflen && n<0) { |
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476 n = -n; |
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477 *buf++ = '-'; |
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478 buflen--; |
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479 } |
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480 utoa_to_buf((unsigned)n, buf, buflen); |
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481 } |
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482 |
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483 // This static buffer is used by both utoa() and itoa(), calling either one a |
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484 // second time will overwrite the previous results. |
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485 // |
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486 // The longest 32 bit integer is -2 billion plus a null terminator: 12 bytes. |
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487 // Note that int is always 32 bits on any remotely unix-like system, see |
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488 // http://www.unix.org/whitepapers/64bit.html for details. |
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489 |
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490 static char itoa_buf[12]; |
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491 |
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492 // Convert unsigned integer to ascii, returning a static buffer. |
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493 char *utoa(unsigned n) |
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494 { |
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495 utoa_to_buf(n, itoa_buf, sizeof(itoa_buf)); |
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496 |
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497 return itoa_buf; |
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498 } |
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499 |
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500 char *itoa(int n) |
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501 { |
694
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|
502 itoa_to_buf(n, itoa_buf, sizeof(itoa_buf)); |
7
fc9c0503d5e2
Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents:
4
diff
changeset
|
503 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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|
504 return itoa_buf; |
7
fc9c0503d5e2
Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents:
4
diff
changeset
|
505 } |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
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diff
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|
506 |
102
aa4fa2543a65
Add atolx() which understands extensions for kilobytes and megabytes and such.
Rob Landley <rob@landley.net>
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diff
changeset
|
507 // atol() with the kilo/mega/giga/tera/peta/exa extensions. |
aa4fa2543a65
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|
508 // (zetta and yotta don't fit in 64 bits.) |
443
41b5ac08208f
Make atolx() error_exit() if fed a string that doesn't convert entirely into an integer.
Rob Landley <rob@landley.net>
parents:
419
diff
changeset
|
509 long atolx(char *numstr) |
102
aa4fa2543a65
Add atolx() which understands extensions for kilobytes and megabytes and such.
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diff
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|
510 { |
694
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671
diff
changeset
|
511 char *c, *suffixes="bkmgtpe", *end; |
786841fdb1e0
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671
diff
changeset
|
512 long val = strtol(numstr, &c, 0); |
102
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Add atolx() which understands extensions for kilobytes and megabytes and such.
Rob Landley <rob@landley.net>
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|
513 |
694
786841fdb1e0
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671
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|
514 if (*c) { |
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Rob Landley <rob@landley.net>
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|
515 if (c != numstr && (end = strchr(suffixes, tolower(*c)))) { |
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diff
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|
516 int shift = end-suffixes; |
786841fdb1e0
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Rob Landley <rob@landley.net>
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|
517 if (shift--) val *= 1024L<<(shift*10); |
786841fdb1e0
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Rob Landley <rob@landley.net>
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|
518 } else { |
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|
519 while (isspace(*c)) c++; |
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diff
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|
520 if (*c) error_exit("not integer: %s", numstr); |
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671
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|
521 } |
786841fdb1e0
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Rob Landley <rob@landley.net>
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|
522 } |
397
b7afbc6b753a
Forgot to check in loopfiles_rw changes needed by truncate.
Rob Landley <rob@landley.net>
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379
diff
changeset
|
523 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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524 return val; |
102
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Rob Landley <rob@landley.net>
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|
525 } |
aa4fa2543a65
Add atolx() which understands extensions for kilobytes and megabytes and such.
Rob Landley <rob@landley.net>
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diff
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|
526 |
565
44abf4d901f3
Rewrite dirtree so we don't need readdir, scandir, and fts.h. Rewrite ls (from scratch) to use new dirtree infrastructure. (This breaks everything else that currently uses dirtree.)
Rob Landley <rob@landley.net>
parents:
554
diff
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|
527 int numlen(long l) |
44abf4d901f3
Rewrite dirtree so we don't need readdir, scandir, and fts.h. Rewrite ls (from scratch) to use new dirtree infrastructure. (This breaks everything else that currently uses dirtree.)
Rob Landley <rob@landley.net>
parents:
554
diff
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|
528 { |
694
786841fdb1e0
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|
529 int len = 0; |
786841fdb1e0
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Rob Landley <rob@landley.net>
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530 while (l) { |
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Rob Landley <rob@landley.net>
parents:
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|
531 l /= 10; |
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|
532 len++; |
786841fdb1e0
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Rob Landley <rob@landley.net>
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|
533 } |
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
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|
534 return len; |
565
44abf4d901f3
Rewrite dirtree so we don't need readdir, scandir, and fts.h. Rewrite ls (from scratch) to use new dirtree infrastructure. (This breaks everything else that currently uses dirtree.)
Rob Landley <rob@landley.net>
parents:
554
diff
changeset
|
535 } |
44abf4d901f3
Rewrite dirtree so we don't need readdir, scandir, and fts.h. Rewrite ls (from scratch) to use new dirtree infrastructure. (This breaks everything else that currently uses dirtree.)
Rob Landley <rob@landley.net>
parents:
554
diff
changeset
|
536 |
623
f51beec92738
New infrastructure for od (oops).
Rob Landley <rob@landley.net>
parents:
615
diff
changeset
|
537 int stridx(char *haystack, char needle) |
f51beec92738
New infrastructure for od (oops).
Rob Landley <rob@landley.net>
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|
538 { |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
539 char *off; |
623
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New infrastructure for od (oops).
Rob Landley <rob@landley.net>
parents:
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diff
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|
540 |
694
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diff
changeset
|
541 if (!needle) return -1; |
786841fdb1e0
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|
542 off = strchr(haystack, needle); |
786841fdb1e0
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Rob Landley <rob@landley.net>
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|
543 if (!off) return -1; |
623
f51beec92738
New infrastructure for od (oops).
Rob Landley <rob@landley.net>
parents:
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diff
changeset
|
544 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
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|
545 return off-haystack; |
623
f51beec92738
New infrastructure for od (oops).
Rob Landley <rob@landley.net>
parents:
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diff
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|
546 } |
f51beec92738
New infrastructure for od (oops).
Rob Landley <rob@landley.net>
parents:
615
diff
changeset
|
547 |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
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52
diff
changeset
|
548 // Return how long the file at fd is, if there's any way to determine it. |
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
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parents:
52
diff
changeset
|
549 off_t fdlength(int fd) |
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
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diff
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|
550 { |
694
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Rob Landley <rob@landley.net>
parents:
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diff
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|
551 off_t bottom = 0, top = 0, pos, old; |
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parents:
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diff
changeset
|
552 int size; |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
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diff
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|
553 |
694
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
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diff
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|
554 // If the ioctl works for this, return it. |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
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diff
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|
555 |
694
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Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
556 if (ioctl(fd, BLKGETSIZE, &size) >= 0) return size*512L; |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
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diff
changeset
|
557 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
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diff
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|
558 // If not, do a binary search for the last location we can read. (Some |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
559 // block devices don't do BLKGETSIZE right.) This should probably have |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
560 // a CONFIG option... |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
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diff
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|
561 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
562 old = lseek(fd, 0, SEEK_CUR); |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
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diff
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|
563 do { |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
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|
564 char temp; |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
52
diff
changeset
|
565 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
566 pos = bottom + (top - bottom) / 2; |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
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diff
changeset
|
567 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
568 // If we can read from the current location, it's bigger. |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
52
diff
changeset
|
569 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
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diff
changeset
|
570 if (lseek(fd, pos, 0)>=0 && read(fd, &temp, 1)==1) { |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
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|
571 if (bottom == top) bottom = top = (top+1) * 2; |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
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diff
changeset
|
572 else bottom = pos; |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
52
diff
changeset
|
573 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
574 // If we can't, it's smaller. |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
52
diff
changeset
|
575 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
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diff
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|
576 } else { |
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
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|
577 if (bottom == top) { |
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
578 if (!top) return 0; |
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
579 bottom = top/2; |
786841fdb1e0
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Rob Landley <rob@landley.net>
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diff
changeset
|
580 } else top = pos; |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
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diff
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|
581 } |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
582 } while (bottom + 1 != top); |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
52
diff
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|
583 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
584 lseek(fd, old, SEEK_SET); |
310
8b8116214b1c
Roberto Foglietta pointed out that readall() needs fdlength() to restore
Rob Landley <rob@landley.net>
parents:
309
diff
changeset
|
585 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
586 return pos + 1; |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
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diff
changeset
|
587 } |
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents:
52
diff
changeset
|
588 |
115
19b5567f0a1b
Add readlink, xreadlink(), and change xrealloc() to not fight the stupid
Rob Landley <rob@landley.net>
parents:
102
diff
changeset
|
589 // This can return null (meaning file not found). It just won't return null |
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590 // for memory allocation reasons. |
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591 char *xreadlink(char *name) |
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592 { |
694
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593 int len, size = 0; |
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594 char *buf = 0; |
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595 |
694
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596 // Grow by 64 byte chunks until it's big enough. |
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597 for(;;) { |
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598 size +=64; |
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599 buf = xrealloc(buf, size); |
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600 len = readlink(name, buf, size); |
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601 |
694
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602 if (len<0) { |
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603 free(buf); |
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604 return 0; |
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605 } |
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606 if (len<size) { |
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607 buf[len]=0; |
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608 return buf; |
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609 } |
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610 } |
115
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611 } |
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612 |
77
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613 /* |
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614 This might be of use or might not. Unknown yet... |
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615 |
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616 // Read contents of file as a single freshly allocated nul-terminated string. |
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617 char *readfile(char *name) |
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618 { |
694
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619 off_t len; |
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620 int fd; |
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621 char *buf; |
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622 |
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623 fd = open(name, O_RDONLY); |
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624 if (fd == -1) return 0; |
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625 len = fdlength(fd); |
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626 buf = xmalloc(len+1); |
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627 buf[readall(fd, buf, len)] = 0; |
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628 |
694
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629 return buf; |
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630 } |
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631 |
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632 char *xreadfile(char *name) |
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633 { |
694
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634 char *buf = readfile(name); |
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635 if (!buf) perror_exit("xreadfile %s", name); |
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636 return buf; |
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637 } |
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638 |
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639 */ |
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640 |
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641 // Open a /var/run/NAME.pid file, dying if we can't write it or if it currently |
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642 // exists and is this executable. |
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643 void xpidfile(char *name) |
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644 { |
694
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645 char pidfile[256], spid[32]; |
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646 int i, fd; |
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647 pid_t pid; |
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648 |
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649 sprintf(pidfile, "/var/run/%s.pid", name); |
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650 // Try three times to open the sucker. |
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651 for (i=0; i<3; i++) { |
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652 fd = open(pidfile, O_CREAT|O_EXCL, 0644); |
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653 if (fd != -1) break; |
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654 |
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655 // If it already existed, read it. Loop for race condition. |
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656 fd = open(pidfile, O_RDONLY); |
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657 if (fd == -1) continue; |
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658 |
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659 // Is the old program still there? |
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660 spid[xread(fd, spid, sizeof(spid)-1)] = 0; |
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661 close(fd); |
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662 pid = atoi(spid); |
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663 if (pid < 1 || kill(pid, 0) == ESRCH) unlink(pidfile); |
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664 |
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665 // An else with more sanity checking might be nice here. |
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666 } |
156
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667 |
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668 if (i == 3) error_exit("xpidfile %s", name); |
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669 |
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670 xwrite(fd, spid, sprintf(spid, "%ld\n", (long)getpid())); |
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671 close(fd); |
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672 } |
185
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673 |
308 | 674 // Iterate through an array of files, opening each one and calling a function |
675 // on that filehandle and name. The special filename "-" means stdin if | |
676 // flags is O_RDONLY, stdout otherwise. An empty argument list calls | |
677 // function() on just stdin/stdout. | |
678 // | |
679 // Note: read only filehandles are automatically closed when function() | |
680 // returns, but writeable filehandles must be close by function() | |
397
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681 void loopfiles_rw(char **argv, int flags, int permissions, int failok, |
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682 void (*function)(int fd, char *name)) |
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683 { |
694
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684 int fd; |
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685 |
694
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686 // If no arguments, read from stdin. |
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687 if (!*argv) function(flags ? 1 : 0, "-"); |
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688 else do { |
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689 // Filename "-" means read from stdin. |
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690 // Inability to open a file prints a warning, but doesn't exit. |
185
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691 |
694
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692 if (!strcmp(*argv,"-")) fd=0; |
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693 else if (0>(fd = open(*argv, flags, permissions)) && !failok) { |
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694 perror_msg("%s", *argv); |
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695 toys.exitval = 1; |
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696 continue; |
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697 } |
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698 function(fd, *argv); |
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699 if (flags == O_RDONLY) close(fd); |
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700 } while (*++argv); |
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701 } |
201
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702 |
397
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703 // Call loopfiles_rw with O_RDONLY and !failok (common case). |
308 | 704 void loopfiles(char **argv, void (*function)(int fd, char *name)) |
705 { | |
694
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706 loopfiles_rw(argv, O_RDONLY, 0, 0, function); |
308 | 707 } |
708 | |
201
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709 // Slow, but small. |
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710 |
284
603275a05524
Teach get_rawline() to continue until a configurable char, and xstrndup()
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711 char *get_rawline(int fd, long *plen, char end) |
201
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712 { |
694
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713 char c, *buf = NULL; |
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714 long len = 0; |
201
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715 |
694
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716 for (;;) { |
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717 if (1>read(fd, &c, 1)) break; |
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718 if (!(len & 63)) buf=xrealloc(buf, len+65); |
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719 if ((buf[len++]=c) == end) break; |
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720 } |
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721 if (buf) buf[len]=0; |
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722 if (plen) *plen = len; |
201
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723 |
694
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724 return buf; |
201
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725 } |
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726 |
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727 char *get_line(int fd) |
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728 { |
694
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729 long len; |
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730 char *buf = get_rawline(fd, &len, '\n'); |
201
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731 |
694
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732 if (buf && buf[--len]=='\n') buf[len]=0; |
201
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733 |
694
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734 return buf; |
201
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735 } |
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736 |
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737 // Copy the rest of in to out and close both files. |
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738 |
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739 void xsendfile(int in, int out) |
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740 { |
694
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741 long len; |
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742 char buf[4096]; |
201
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743 |
694
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744 if (in<0) return; |
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745 for (;;) { |
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746 len = xread(in, buf, 4096); |
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|
747 if (len<1) break; |
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|
748 xwrite(out, buf, len); |
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749 } |
209 | 750 } |
751 | |
590
7becb497c3c4
Update chmod to work with new dirtree, and fix bugs in string_to_mode().
Rob Landley <rob@landley.net>
parents:
585
diff
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|
752 int wfchmodat(int fd, char *name, mode_t mode) |
7becb497c3c4
Update chmod to work with new dirtree, and fix bugs in string_to_mode().
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|
753 { |
694
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754 int rc = fchmodat(fd, name, mode, 0); |
590
7becb497c3c4
Update chmod to work with new dirtree, and fix bugs in string_to_mode().
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|
755 |
694
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756 if (rc) { |
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757 perror_msg("chmod '%s' to %04o", name, mode); |
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758 toys.exitval=1; |
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759 } |
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|
760 return rc; |
590
7becb497c3c4
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parents:
585
diff
changeset
|
761 } |
7becb497c3c4
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parents:
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diff
changeset
|
762 |
643
7bdebd2af1d6
Add signal handler to clean up tempfile.
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parents:
640
diff
changeset
|
763 static char *tempfile2zap; |
7bdebd2af1d6
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Rob Landley <rob@landley.net>
parents:
640
diff
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|
764 static void tempfile_handler(int i) |
7bdebd2af1d6
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parents:
640
diff
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|
765 { |
694
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|
766 if (1 < (long)tempfile2zap) unlink(tempfile2zap); |
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|
767 _exit(1); |
643
7bdebd2af1d6
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parents:
640
diff
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|
768 } |
7bdebd2af1d6
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|
769 |
209 | 770 // Open a temporary file to copy an existing file into. |
771 int copy_tempfile(int fdin, char *name, char **tempname) | |
772 { | |
694
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773 struct stat statbuf; |
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774 int fd; |
209 | 775 |
694
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776 *tempname = xstrndup(name, strlen(name)+6); |
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777 strcat(*tempname,"XXXXXX"); |
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778 if(-1 == (fd = mkstemp(*tempname))) error_exit("no temp file"); |
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779 if (!tempfile2zap) sigatexit(tempfile_handler); |
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780 tempfile2zap = *tempname; |
209 | 781 |
694
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782 // Set permissions of output file |
209 | 783 |
694
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784 fstat(fdin, &statbuf); |
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785 fchmod(fd, statbuf.st_mode); |
209 | 786 |
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787 return fd; |
201
5d523752715a
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788 } |
209 | 789 |
790 // Abort the copy and delete the temporary file. | |
791 void delete_tempfile(int fdin, int fdout, char **tempname) | |
792 { | |
694
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793 close(fdin); |
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794 close(fdout); |
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795 unlink(*tempname); |
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796 tempfile2zap = (char *)1; |
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797 free(*tempname); |
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798 *tempname = NULL; |
209 | 799 } |
800 | |
801 // Copy the rest of the data and replace the original with the copy. | |
802 void replace_tempfile(int fdin, int fdout, char **tempname) | |
803 { | |
694
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804 char *temp = xstrdup(*tempname); |
209 | 805 |
694
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806 temp[strlen(temp)-6]=0; |
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807 if (fdin != -1) { |
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808 xsendfile(fdin, fdout); |
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809 xclose(fdin); |
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810 } |
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811 xclose(fdout); |
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812 rename(*tempname, temp); |
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813 tempfile2zap = (char *)1; |
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814 free(*tempname); |
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815 free(temp); |
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816 *tempname = NULL; |
209 | 817 } |
334
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818 |
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819 // Create a 256 entry CRC32 lookup table. |
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820 |
337
aaafa1ceaa91
Add -N, -I, -L, and -P options to cksum.
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821 void crc_init(unsigned int *crc_table, int little_endian) |
334
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822 { |
694
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823 unsigned int i; |
334
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824 |
694
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825 // Init the CRC32 table (big endian) |
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826 for (i=0; i<256; i++) { |
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827 unsigned int j, c = little_endian ? i : i<<24; |
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828 for (j=8; j; j--) |
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829 if (little_endian) c = (c&1) ? (c>>1)^0xEDB88320 : c>>1; |
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830 else c=c&0x80000000 ? (c<<1)^0x04c11db7 : (c<<1); |
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831 crc_table[i] = c; |
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832 } |
334
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833 } |
419
af0cca0aba9d
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834 |
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835 // Quick and dirty query size of terminal, doesn't do ANSI probe fallback. |
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836 // set *x=0 and *y=0 before calling to detect failure to set either, or |
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837 // x=80 y=25 to provide defaults |
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838 |
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Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
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839 void terminal_size(unsigned *x, unsigned *y) |
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840 { |
694
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841 struct winsize ws; |
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842 int i; |
419
af0cca0aba9d
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|
843 |
694
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|
844 //memset(&ws, 0, sizeof(ws)); |
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845 for (i=0; i<3; i++) { |
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846 if (ioctl(i, TIOCGWINSZ, &ws)) continue; |
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847 if (x) *x = ws.ws_col; |
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848 if (y) *y = ws.ws_row; |
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849 } |
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850 if (x) { |
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|
851 char *s = getenv("COLUMNS"); |
419
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Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
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|
852 |
694
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853 i = s ? atoi(s) : 0; |
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854 if (i>0) *x = i; |
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855 } |
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856 if (y) { |
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|
857 char *s = getenv("ROWS"); |
419
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Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
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|
858 |
694
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859 i = s ? atoi(s) : 0; |
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|
860 if (i>0) *y = i; |
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|
861 } |
419
af0cca0aba9d
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diff
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|
862 } |
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Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
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863 |
af0cca0aba9d
Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
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|
864 // This should use a raw tty, fixit later. |
503
3b9dea897dc0
Upgrade yesno() and make cp -i use it.
Rob Landley <rob@landley.net>
parents:
498
diff
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|
865 int yesno(char *prompt, int def) |
419
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Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
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866 { |
694
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|
867 FILE *fps[] = {stdin, stdout, stderr}; |
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868 int i; |
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|
869 char buf; |
419
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|
870 |
694
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871 for (i=0; i<3; i++) if (isatty(i)) break; |
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|
872 if (i == 3) return 1; |
419
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|
873 |
694
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874 fprintf(fps[i], "%s (%c/%c):", prompt, def ? 'Y' : 'y', def ? 'n' : 'N'); |
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|
875 fflush(fps[i]); |
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|
876 while (fread(&buf, 1, 1, fps[i])) { |
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877 if (tolower(buf) == 'y') def = 1; |
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878 if (tolower(buf) == 'n') def = 0; |
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879 else if (!isspace(buf)) continue; |
550
b2194045c40e
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diff
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|
880 |
694
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881 break; |
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882 } |
550
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535
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|
883 |
694
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884 return def; |
419
af0cca0aba9d
Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
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399
diff
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|
885 } |
475
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diff
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|
886 |
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|
887 // Execute a callback for each PID that matches a process name from a list. |
477
f0b07ce5f125
Cleanups to pidof (including some global infrastructure shared with killall).
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888 void for_each_pid_with_name_in(char **names, void (*callback)(pid_t pid)) |
f0b07ce5f125
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|
889 { |
694
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890 DIR *dp; |
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891 struct dirent *entry; |
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892 char cmd[sizeof(toybuf)], path[64]; |
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893 char **curname; |
475
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|
894 |
694
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895 if (!(dp = opendir("/proc"))) perror_exit("opendir"); |
475
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Add killall by Andreas Heck, and factor out common pid code to lib.h.
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896 |
694
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897 while ((entry = readdir(dp))) { |
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|
898 int fd, n; |
475
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Add killall by Andreas Heck, and factor out common pid code to lib.h.
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|
899 |
694
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|
900 if (!isdigit(*entry->d_name)) continue; |
475
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Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
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|
901 |
694
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|
902 if (sizeof(path) <= snprintf(path, sizeof(path), "/proc/%s/cmdline", |
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|
903 entry->d_name)) continue; |
475
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Add killall by Andreas Heck, and factor out common pid code to lib.h.
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diff
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|
904 |
694
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|
905 if (-1 == (fd=open(path, O_RDONLY))) continue; |
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|
906 n = read(fd, cmd, sizeof(cmd)); |
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|
907 close(fd); |
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|
908 if (n<1) continue; |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
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443
diff
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|
909 |
694
786841fdb1e0
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|
910 for (curname = names; *curname; curname++) |
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|
911 if (!strcmp(basename(cmd), *curname)) callback(atol(entry->d_name)); |
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|
912 } |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
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diff
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|
913 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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diff
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|
914 closedir(dp); |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
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diff
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|
915 } |
498
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
916 |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
480
diff
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|
917 struct signame { |
694
786841fdb1e0
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|
918 int num; |
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|
919 char *name; |
498
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
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480
diff
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|
920 }; |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
921 |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
480
diff
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|
922 // Signals required by POSIX 2008: |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
480
diff
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|
923 // http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
924 |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
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480
diff
changeset
|
925 #define SIGNIFY(x) {SIG##x, #x} |
c9aaceccd6bd
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Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
926 |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
927 static struct signame signames[] = { |
694
786841fdb1e0
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|
928 SIGNIFY(ABRT), SIGNIFY(ALRM), SIGNIFY(BUS), |
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|
929 SIGNIFY(FPE), SIGNIFY(HUP), SIGNIFY(ILL), SIGNIFY(INT), SIGNIFY(KILL), |
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|
930 SIGNIFY(PIPE), SIGNIFY(QUIT), SIGNIFY(SEGV), SIGNIFY(TERM), |
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diff
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|
931 SIGNIFY(USR1), SIGNIFY(USR2), SIGNIFY(SYS), SIGNIFY(TRAP), |
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diff
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|
932 SIGNIFY(VTALRM), SIGNIFY(XCPU), SIGNIFY(XFSZ), |
643
7bdebd2af1d6
Add signal handler to clean up tempfile.
Rob Landley <rob@landley.net>
parents:
640
diff
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|
933 |
694
786841fdb1e0
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diff
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|
934 // Start of non-terminal signals |
643
7bdebd2af1d6
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Rob Landley <rob@landley.net>
parents:
640
diff
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|
935 |
694
786841fdb1e0
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|
936 SIGNIFY(CHLD), SIGNIFY(CONT), SIGNIFY(STOP), SIGNIFY(TSTP), |
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diff
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|
937 SIGNIFY(TTIN), SIGNIFY(TTOU), SIGNIFY(URG) |
498
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
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diff
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|
938 }; |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
939 |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
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480
diff
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|
940 // not in posix: SIGNIFY(STKFLT), SIGNIFY(WINCH), SIGNIFY(IO), SIGNIFY(PWR) |
c9aaceccd6bd
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Rob Landley <rob@landley.net>
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diff
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|
941 // obsolete: SIGNIFY(PROF) SIGNIFY(POLL) |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
942 |
643
7bdebd2af1d6
Add signal handler to clean up tempfile.
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640
diff
changeset
|
943 // Install the same handler on every signal that defaults to killing the process |
7bdebd2af1d6
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640
diff
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|
944 void sigatexit(void *handler) |
7bdebd2af1d6
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diff
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|
945 { |
694
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|
946 int i; |
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|
947 for (i=0; signames[i].num != SIGCHLD; i++) signal(signames[i].num, handler); |
643
7bdebd2af1d6
Add signal handler to clean up tempfile.
Rob Landley <rob@landley.net>
parents:
640
diff
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|
948 } |
498
c9aaceccd6bd
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Rob Landley <rob@landley.net>
parents:
480
diff
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|
949 // Convert name to signal number. If name == NULL print names. |
c9aaceccd6bd
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parents:
480
diff
changeset
|
950 int sig_to_num(char *pidstr) |
c9aaceccd6bd
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Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
951 { |
694
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671
diff
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|
952 int i; |
498
c9aaceccd6bd
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Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
953 |
694
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|
954 if (pidstr) { |
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|
955 char *s; |
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|
956 i = strtol(pidstr, &s, 10); |
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|
957 if (!*s) return i; |
498
c9aaceccd6bd
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Rob Landley <rob@landley.net>
parents:
480
diff
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|
958 |
694
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|
959 if (!strncasecmp(pidstr, "sig", 3)) pidstr+=3; |
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|
960 } |
786841fdb1e0
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|
961 for (i = 0; i < sizeof(signames)/sizeof(struct signame); i++) |
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|
962 if (!pidstr) xputs(signames[i].name); |
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963 else if (!strcasecmp(pidstr, signames[i].name)) return signames[i].num; |
498
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Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
Rob Landley <rob@landley.net>
parents:
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diff
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|
964 |
694
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|
965 return -1; |
498
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Rob Landley <rob@landley.net>
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diff
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|
966 } |
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Rob Landley <rob@landley.net>
parents:
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diff
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|
967 |
c9aaceccd6bd
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Rob Landley <rob@landley.net>
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changeset
|
968 char *num_to_sig(int sig) |
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Rob Landley <rob@landley.net>
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diff
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|
969 { |
694
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|
970 int i; |
498
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parents:
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|
971 |
694
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972 for (i=0; i<sizeof(signames)/sizeof(struct signame); i++) |
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|
973 if (signames[i].num == sig) return signames[i].name; |
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|
974 return NULL; |
498
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|
975 } |
551
2548e6e590b2
Add string to mode_t parser
Daniel Walter <d.walter@0x90.at>
parents:
550
diff
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|
976 |
643
7bdebd2af1d6
Add signal handler to clean up tempfile.
Rob Landley <rob@landley.net>
parents:
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diff
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|
977 // premute mode bits based on posix mode strings. |
578
5cc8a8fc08b4
First pass at a complete rewrite of string_to_mode(). (It compiled!)
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diff
changeset
|
978 mode_t string_to_mode(char *modestr, mode_t mode) |
551
2548e6e590b2
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Daniel Walter <d.walter@0x90.at>
parents:
550
diff
changeset
|
979 { |
694
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|
980 char *whos = "ogua", *hows = "=+-", *whats = "xwrstX", *whys = "ogu"; |
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|
981 char *s, *str = modestr; |
553 | 982 |
694
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|
983 // Handle octal mode |
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984 if (isdigit(*str)) { |
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985 mode = strtol(str, &s, 8); |
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986 if (*s || (mode & ~(07777))) goto barf; |
553 | 987 |
694
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988 return mode; |
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989 } |
578
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|
990 |
694
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991 // Gaze into the bin of permission... |
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992 for (;;) { |
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993 int i, j, dowho, dohow, dowhat, amask; |
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|
994 |
694
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995 dowho = dohow = dowhat = amask = 0; |
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996 |
694
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997 // Find the who, how, and what stanzas, in that order |
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998 while (*str && (s = strchr(whos, *str))) { |
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999 dowho |= 1<<(s-whos); |
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1000 str++; |
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1001 } |
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1002 // If who isn't specified, like "a" but honoring umask. |
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1003 if (!dowho) { |
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1004 dowho = 8; |
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1005 umask(amask=umask(0)); |
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1006 } |
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1007 if (!*str || !(s = strchr(hows, *str))) goto barf; |
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1008 dohow = *(str++); |
590
7becb497c3c4
Update chmod to work with new dirtree, and fix bugs in string_to_mode().
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585
diff
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1009 |
694
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1010 if (!dohow) goto barf; |
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1011 while (*str && (s = strchr(whats, *str))) { |
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1012 dowhat |= 1<<(s-whats); |
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1013 str++; |
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1014 } |
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1015 |
694
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1016 // Convert X to x for directory or if already executable somewhere |
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1017 if ((dowhat&32) && (S_ISDIR(mode) || (mode&0111))) dowhat |= 1; |
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1018 |
694
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1019 // Copy mode from another category? |
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1020 if (!dowhat && *str && (s = strchr(whys, *str))) { |
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1021 dowhat = (mode>>(3*(s-whys)))&7; |
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1022 str++; |
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1023 } |
578
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1024 |
694
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|
1025 // Are we ready to do a thing yet? |
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1026 if (*str && *(str++) != ',') goto barf; |
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1027 |
694
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1028 // Ok, apply the bits to the mode. |
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1029 for (i=0; i<4; i++) { |
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1030 for (j=0; j<3; j++) { |
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1031 mode_t bit = 0; |
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|
1032 int where = 1<<((3*i)+j); |
638
92200901cfe1
Make chmod +w respect umask, implement +s and +t, fix ls to show suid/sgid/stid without x bit.
Rob Landley <rob@landley.net>
parents:
623
diff
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|
1033 |
694
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|
1034 if (amask & where) continue; |
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|
1035 |
694
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|
1036 // Figure out new value at this location |
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1037 if (i == 3) { |
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1038 // suid/sticky bit. |
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|
1039 if (j) { |
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1040 if ((dowhat & 8) && (dowho&(8|(1<<i)))) bit++; |
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1041 } else if (dowhat & 16) bit++; |
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|
1042 } else { |
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|
1043 if (!(dowho&(8|(1<<i)))) continue; |
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|
1044 if (dowhat&(1<<j)) bit++; |
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|
1045 } |
578
5cc8a8fc08b4
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1047 // When selection active, modify bit |
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1048 |
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1049 if (dohow == '=' || (bit && dohow == '-')) mode &= ~where; |
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1050 if (bit && dohow != '-') mode |= where; |
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1051 } |
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1052 } |
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1053 |
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1054 if (!*str) break; |
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1055 } |
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1056 return mode; |
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1057 barf: |
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1058 error_exit("bad mode '%s'", modestr); |
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1059 } |
658 | 1060 |
1061 | |
1062 char* make_human_readable(unsigned long long size, unsigned long unit) | |
1063 { | |
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1064 unsigned int frac = 0; |
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1065 if(unit) { |
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1066 size = (size/(unit)) + (size%(unit)?1:0); |
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1067 return xmsprintf("%llu", size); |
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1068 } |
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1069 else { |
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1070 static char units[] = {'\0', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'}; |
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1071 int index = 0; |
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1072 while(size >= 1024) { |
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1073 frac = size%1024; |
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1074 size /= 1024; |
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1075 index++; |
658 | 1076 } |
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1077 frac = (frac/102) + ((frac%102)?1:0); |
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1078 if(frac >= 10) { |
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1079 size += 1; |
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1080 frac = 0; |
658 | 1081 } |
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1082 if(frac) return xmsprintf("%llu.%u%c", size, frac, units[index]); |
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1083 else return xmsprintf("%llu%c", size, units[index]); |
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1084 } |
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1085 return NULL; //not reached |
658 | 1086 } |
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1087 |
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1088 /* |
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1089 * used to get the interger value. |
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1090 */ |
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1091 unsigned long get_int_value(const char *numstr, unsigned lowrange, unsigned highrange) |
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1092 { |
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1093 unsigned long rvalue = 0; |
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1094 char *ptr; |
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1095 if(*numstr == '-' || *numstr == '+' || isspace(*numstr)) perror_exit("invalid number '%s'", numstr); |
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1096 errno = 0; |
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1097 rvalue = strtoul(numstr, &ptr, 10); |
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1098 if(errno || numstr == ptr) perror_exit("invalid number '%s'", numstr); |
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1099 if(*ptr) perror_exit("invalid number '%s'", numstr); |
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1100 if(rvalue >= lowrange && rvalue <= highrange) return rvalue; |
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1101 else { |
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1102 perror_exit("invalid number '%s'", numstr); |
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1103 return rvalue; //Not reachable; to avoid waring message. |
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1104 } |
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1105 } |