Mercurial > hg > toybox
annotate lib/lib.c @ 696:99ca30ad3d2b
Add rebound support to intercept error_exit() and longjmp instead.
author | Rob Landley <rob@landley.net> |
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date | Fri, 16 Nov 2012 00:35:46 -0600 |
parents | 786841fdb1e0 |
children | 078138791b5c |
rev | line source |
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250
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Fix filename in header
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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 } |
623
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308 |
694
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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 { |
694
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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 // Cannonicalizes path by removing ".", "..", and "//" elements. This is not |
44 | 327 // the same as realpath(), where "dir/.." could wind up somewhere else by |
328 // following symlinks. | |
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329 char *xabspath(char *path) |
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330 { |
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331 char *from, *to; |
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332 |
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333 // If this isn't an absolute path, make it one with cwd. |
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334 if (path[0]!='/') { |
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335 char *cwd=xgetcwd(); |
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336 path = xmsprintf("%s/%s", cwd, path); |
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337 free(cwd); |
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338 } else path = xstrdup(path); |
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339 |
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340 // Loop through path elements |
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341 from = to = path; |
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342 while (*from) { |
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343 |
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344 // Continue any current path component. |
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345 if (*from!='/') { |
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346 *(to++) = *(from++); |
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347 continue; |
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348 } |
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349 |
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350 // Skip duplicate slashes. |
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351 while (*from=='/') from++; |
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352 |
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353 // Start of a new filename. Handle . and .. |
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354 while (*from=='.') { |
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355 // Skip . |
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356 if (from[1]=='/') from += 2; |
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357 else if (!from[1]) from++; |
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358 // Back up for .. |
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359 else if (from[1]=='.') { |
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360 if (from[2]=='/') from +=3; |
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361 else if(!from[2]) from+=2; |
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362 else break; |
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363 while (to>path && *(--to)!='/'); |
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364 } else break; |
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365 } |
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366 // Add directory separator slash. |
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367 *(to++) = '/'; |
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368 } |
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369 *to = 0; |
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370 |
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371 return path; |
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372 } |
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373 |
585
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374 // Resolve all symlinks, returning malloc() memory. |
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375 char *xrealpath(char *path) |
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376 { |
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377 char *new = realpath(path, NULL); |
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378 if (!new) perror_exit("realpath '%s'", path); |
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379 return new; |
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380 } |
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381 |
292
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382 void xchdir(char *path) |
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383 { |
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384 if (chdir(path)) error_exit("chdir '%s'", path); |
292
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385 } |
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386 |
216
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387 // Ensure entire path exists. |
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388 // If mode != -1 set permissions on newly created dirs. |
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389 // Requires that path string be writable (for temporary null terminators). |
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390 void xmkpath(char *path, int mode) |
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391 { |
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392 char *p, old; |
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393 mode_t mask; |
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394 int rc; |
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395 struct stat st; |
216
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396 |
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397 for (p = path; ; p++) { |
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398 if (!*p || *p == '/') { |
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399 old = *p; |
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400 *p = rc = 0; |
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401 if (stat(path, &st) || !S_ISDIR(st.st_mode)) { |
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402 if (mode != -1) { |
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403 mask=umask(0); |
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404 rc = mkdir(path, mode); |
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405 umask(mask); |
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406 } else rc = mkdir(path, 0777); |
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407 } |
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408 *p = old; |
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409 if(rc) perror_exit("mkpath '%s'", path); |
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410 } |
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411 if (!*p) break; |
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412 } |
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413 } |
370 | 414 |
415 // setuid() can fail (for example, too many processes belonging to that user), | |
416 // which opens a security hole if the process continues as the original user. | |
417 | |
418 void xsetuid(uid_t uid) | |
419 { | |
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420 if (setuid(uid)) perror_exit("xsetuid"); |
370 | 421 } |
422 | |
423 | |
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424 // Find all file in a colon-separated path with access type "type" (generally |
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425 // X_OK or R_OK). Returns a list of absolute paths to each file found, in |
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426 // order. |
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427 |
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428 struct string_list *find_in_path(char *path, char *filename) |
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429 { |
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430 struct string_list *rlist = NULL, **prlist=&rlist; |
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431 char *cwd = xgetcwd(); |
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432 |
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433 for (;;) { |
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434 char *next = path ? strchr(path, ':') : NULL; |
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435 int len = next ? next-path : strlen(path); |
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436 struct string_list *rnext; |
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437 struct stat st; |
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438 |
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439 rnext = xmalloc(sizeof(void *) + strlen(filename) |
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440 + (len ? len : strlen(cwd)) + 2); |
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441 if (!len) sprintf(rnext->str, "%s/%s", cwd, filename); |
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442 else { |
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443 char *res = rnext->str; |
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444 strncpy(res, path, len); |
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445 res += len; |
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446 *(res++) = '/'; |
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447 strcpy(res, filename); |
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448 } |
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449 |
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450 // Confirm it's not a directory. |
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451 if (!stat(rnext->str, &st) && S_ISREG(st.st_mode)) { |
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452 *prlist = rnext; |
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453 rnext->next = NULL; |
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454 prlist = &(rnext->next); |
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455 } else free(rnext); |
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456 |
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457 if (!next) break; |
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458 path += len; |
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459 path++; |
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460 } |
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461 free(cwd); |
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462 |
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463 return rlist; |
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464 } |
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465 |
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466 // Convert unsigned int to ascii, writing into supplied buffer. A truncated |
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467 // result contains the first few digits of the result ala strncpy, and is |
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468 // always null terminated (unless buflen is 0). |
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469 void utoa_to_buf(unsigned n, char *buf, unsigned buflen) |
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470 { |
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471 int i, out = 0; |
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472 |
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473 if (buflen) { |
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474 for (i=1000000000; i; i/=10) { |
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475 int res = n/i; |
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476 |
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477 if ((res || out || i == 1) && --buflen>0) { |
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478 out++; |
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479 n -= res*i; |
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480 *buf++ = '0' + res; |
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481 } |
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482 } |
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483 *buf = 0; |
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484 } |
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485 } |
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486 |
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487 // Convert signed integer to ascii, using utoa_to_buf() |
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488 void itoa_to_buf(int n, char *buf, unsigned buflen) |
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489 { |
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490 if (buflen && n<0) { |
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491 n = -n; |
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492 *buf++ = '-'; |
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493 buflen--; |
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494 } |
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495 utoa_to_buf((unsigned)n, buf, buflen); |
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496 } |
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497 |
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498 // This static buffer is used by both utoa() and itoa(), calling either one a |
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499 // second time will overwrite the previous results. |
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500 // |
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501 // The longest 32 bit integer is -2 billion plus a null terminator: 12 bytes. |
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502 // Note that int is always 32 bits on any remotely unix-like system, see |
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503 // http://www.unix.org/whitepapers/64bit.html for details. |
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504 |
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505 static char itoa_buf[12]; |
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506 |
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507 // Convert unsigned integer to ascii, returning a static buffer. |
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508 char *utoa(unsigned n) |
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509 { |
694
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510 utoa_to_buf(n, itoa_buf, sizeof(itoa_buf)); |
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511 |
694
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512 return itoa_buf; |
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513 } |
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514 |
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515 char *itoa(int n) |
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516 { |
694
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517 itoa_to_buf(n, itoa_buf, sizeof(itoa_buf)); |
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518 |
694
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519 return itoa_buf; |
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520 } |
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521 |
102
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522 // atol() with the kilo/mega/giga/tera/peta/exa extensions. |
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523 // (zetta and yotta don't fit in 64 bits.) |
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524 long atolx(char *numstr) |
102
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525 { |
694
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526 char *c, *suffixes="bkmgtpe", *end; |
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527 long val = strtol(numstr, &c, 0); |
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528 |
694
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529 if (*c) { |
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530 if (c != numstr && (end = strchr(suffixes, tolower(*c)))) { |
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531 int shift = end-suffixes; |
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532 if (shift--) val *= 1024L<<(shift*10); |
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533 } else { |
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534 while (isspace(*c)) c++; |
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535 if (*c) error_exit("not integer: %s", numstr); |
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536 } |
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537 } |
397
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Forgot to check in loopfiles_rw changes needed by truncate.
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538 |
694
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539 return val; |
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540 } |
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541 |
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.)
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542 int numlen(long l) |
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543 { |
694
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544 int len = 0; |
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545 while (l) { |
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546 l /= 10; |
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547 len++; |
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548 } |
786841fdb1e0
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549 return len; |
565
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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.)
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parents:
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|
550 } |
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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.)
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551 |
623
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New infrastructure for od (oops).
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552 int stridx(char *haystack, char needle) |
f51beec92738
New infrastructure for od (oops).
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553 { |
694
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554 char *off; |
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555 |
694
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|
556 if (!needle) return -1; |
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557 off = strchr(haystack, needle); |
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558 if (!off) return -1; |
623
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|
559 |
694
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560 return off-haystack; |
623
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New infrastructure for od (oops).
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|
561 } |
f51beec92738
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Rob Landley <rob@landley.net>
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|
562 |
53
41d55b5d49fd
Add start of mke2fs/gene2fs, and some other stuff I've been working on.
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563 // Return how long the file at fd is, if there's any way to determine it. |
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564 off_t fdlength(int fd) |
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565 { |
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566 off_t bottom = 0, top = 0, pos, old; |
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|
567 int size; |
53
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568 |
694
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|
569 // If the ioctl works for this, return it. |
53
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|
570 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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571 if (ioctl(fd, BLKGETSIZE, &size) >= 0) return size*512L; |
53
41d55b5d49fd
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|
572 |
694
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573 // If not, do a binary search for the last location we can read. (Some |
786841fdb1e0
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Rob Landley <rob@landley.net>
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|
574 // block devices don't do BLKGETSIZE right.) This should probably have |
786841fdb1e0
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575 // a CONFIG option... |
53
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|
576 |
694
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577 old = lseek(fd, 0, SEEK_CUR); |
786841fdb1e0
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578 do { |
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|
579 char temp; |
53
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580 |
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|
581 pos = bottom + (top - bottom) / 2; |
53
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582 |
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583 // If we can read from the current location, it's bigger. |
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584 |
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585 if (lseek(fd, pos, 0)>=0 && read(fd, &temp, 1)==1) { |
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586 if (bottom == top) bottom = top = (top+1) * 2; |
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587 else bottom = pos; |
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588 |
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589 // If we can't, it's smaller. |
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590 |
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591 } else { |
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592 if (bottom == top) { |
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593 if (!top) return 0; |
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594 bottom = top/2; |
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595 } else top = pos; |
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596 } |
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597 } while (bottom + 1 != top); |
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598 |
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599 lseek(fd, old, SEEK_SET); |
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600 |
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601 return pos + 1; |
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602 } |
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603 |
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604 // This can return null (meaning file not found). It just won't return null |
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605 // for memory allocation reasons. |
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606 char *xreadlink(char *name) |
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607 { |
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608 int len, size = 0; |
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609 char *buf = 0; |
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610 |
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611 // Grow by 64 byte chunks until it's big enough. |
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612 for(;;) { |
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613 size +=64; |
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614 buf = xrealloc(buf, size); |
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615 len = readlink(name, buf, size); |
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616 |
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617 if (len<0) { |
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618 free(buf); |
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619 return 0; |
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620 } |
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621 if (len<size) { |
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622 buf[len]=0; |
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623 return buf; |
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624 } |
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625 } |
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626 } |
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627 |
77
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The fdlength() ioctl apparently doesn't work on files (and the lseek trick
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628 /* |
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629 This might be of use or might not. Unknown yet... |
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630 |
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631 // Read contents of file as a single freshly allocated nul-terminated string. |
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632 char *readfile(char *name) |
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633 { |
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634 off_t len; |
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635 int fd; |
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636 char *buf; |
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637 |
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638 fd = open(name, O_RDONLY); |
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639 if (fd == -1) return 0; |
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640 len = fdlength(fd); |
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641 buf = xmalloc(len+1); |
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642 buf[readall(fd, buf, len)] = 0; |
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643 |
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644 return buf; |
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645 } |
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646 |
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647 char *xreadfile(char *name) |
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648 { |
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649 char *buf = readfile(name); |
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650 if (!buf) perror_exit("xreadfile %s", name); |
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651 return buf; |
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652 } |
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653 |
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654 */ |
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655 |
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656 // Open a /var/run/NAME.pid file, dying if we can't write it or if it currently |
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657 // exists and is this executable. |
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658 void xpidfile(char *name) |
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659 { |
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660 char pidfile[256], spid[32]; |
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661 int i, fd; |
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662 pid_t pid; |
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663 |
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664 sprintf(pidfile, "/var/run/%s.pid", name); |
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665 // Try three times to open the sucker. |
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666 for (i=0; i<3; i++) { |
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667 fd = open(pidfile, O_CREAT|O_EXCL, 0644); |
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668 if (fd != -1) break; |
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669 |
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670 // If it already existed, read it. Loop for race condition. |
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671 fd = open(pidfile, O_RDONLY); |
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672 if (fd == -1) continue; |
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673 |
694
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674 // Is the old program still there? |
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675 spid[xread(fd, spid, sizeof(spid)-1)] = 0; |
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676 close(fd); |
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677 pid = atoi(spid); |
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678 if (pid < 1 || kill(pid, 0) == ESRCH) unlink(pidfile); |
53
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679 |
694
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680 // An else with more sanity checking might be nice here. |
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681 } |
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682 |
694
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683 if (i == 3) error_exit("xpidfile %s", name); |
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684 |
694
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685 xwrite(fd, spid, sprintf(spid, "%ld\n", (long)getpid())); |
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686 close(fd); |
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687 } |
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688 |
308 | 689 // Iterate through an array of files, opening each one and calling a function |
690 // on that filehandle and name. The special filename "-" means stdin if | |
691 // flags is O_RDONLY, stdout otherwise. An empty argument list calls | |
692 // function() on just stdin/stdout. | |
693 // | |
694 // Note: read only filehandles are automatically closed when function() | |
695 // returns, but writeable filehandles must be close by function() | |
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696 void loopfiles_rw(char **argv, int flags, int permissions, int failok, |
694
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697 void (*function)(int fd, char *name)) |
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698 { |
694
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699 int fd; |
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700 |
694
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701 // If no arguments, read from stdin. |
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702 if (!*argv) function(flags ? 1 : 0, "-"); |
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703 else do { |
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704 // Filename "-" means read from stdin. |
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705 // Inability to open a file prints a warning, but doesn't exit. |
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706 |
694
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707 if (!strcmp(*argv,"-")) fd=0; |
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708 else if (0>(fd = open(*argv, flags, permissions)) && !failok) { |
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709 perror_msg("%s", *argv); |
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710 toys.exitval = 1; |
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711 continue; |
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712 } |
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713 function(fd, *argv); |
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714 if (flags == O_RDONLY) close(fd); |
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715 } while (*++argv); |
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716 } |
201
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717 |
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718 // Call loopfiles_rw with O_RDONLY and !failok (common case). |
308 | 719 void loopfiles(char **argv, void (*function)(int fd, char *name)) |
720 { | |
694
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721 loopfiles_rw(argv, O_RDONLY, 0, 0, function); |
308 | 722 } |
723 | |
201
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724 // Slow, but small. |
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725 |
284
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Teach get_rawline() to continue until a configurable char, and xstrndup()
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726 char *get_rawline(int fd, long *plen, char end) |
201
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727 { |
694
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728 char c, *buf = NULL; |
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729 long len = 0; |
201
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730 |
694
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731 for (;;) { |
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732 if (1>read(fd, &c, 1)) break; |
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733 if (!(len & 63)) buf=xrealloc(buf, len+65); |
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734 if ((buf[len++]=c) == end) break; |
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735 } |
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736 if (buf) buf[len]=0; |
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737 if (plen) *plen = len; |
201
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738 |
694
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739 return buf; |
201
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740 } |
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741 |
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742 char *get_line(int fd) |
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743 { |
694
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744 long len; |
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745 char *buf = get_rawline(fd, &len, '\n'); |
201
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746 |
694
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747 if (buf && buf[--len]=='\n') buf[len]=0; |
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748 |
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749 return buf; |
201
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750 } |
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751 |
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752 // Copy the rest of in to out and close both files. |
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753 |
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754 void xsendfile(int in, int out) |
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755 { |
694
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756 long len; |
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757 char buf[4096]; |
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758 |
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759 if (in<0) return; |
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760 for (;;) { |
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761 len = xread(in, buf, 4096); |
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762 if (len<1) break; |
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763 xwrite(out, buf, len); |
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764 } |
209 | 765 } |
766 | |
590
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767 int wfchmodat(int fd, char *name, mode_t mode) |
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768 { |
694
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769 int rc = fchmodat(fd, name, mode, 0); |
590
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770 |
694
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771 if (rc) { |
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772 perror_msg("chmod '%s' to %04o", name, mode); |
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773 toys.exitval=1; |
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774 } |
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775 return rc; |
590
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776 } |
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777 |
643
7bdebd2af1d6
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|
778 static char *tempfile2zap; |
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|
779 static void tempfile_handler(int i) |
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780 { |
694
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781 if (1 < (long)tempfile2zap) unlink(tempfile2zap); |
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782 _exit(1); |
643
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783 } |
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784 |
209 | 785 // Open a temporary file to copy an existing file into. |
786 int copy_tempfile(int fdin, char *name, char **tempname) | |
787 { | |
694
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788 struct stat statbuf; |
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789 int fd; |
209 | 790 |
694
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791 *tempname = xstrndup(name, strlen(name)+6); |
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792 strcat(*tempname,"XXXXXX"); |
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793 if(-1 == (fd = mkstemp(*tempname))) error_exit("no temp file"); |
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794 if (!tempfile2zap) sigatexit(tempfile_handler); |
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795 tempfile2zap = *tempname; |
209 | 796 |
694
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797 // Set permissions of output file |
209 | 798 |
694
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799 fstat(fdin, &statbuf); |
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800 fchmod(fd, statbuf.st_mode); |
209 | 801 |
694
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802 return fd; |
201
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803 } |
209 | 804 |
805 // Abort the copy and delete the temporary file. | |
806 void delete_tempfile(int fdin, int fdout, char **tempname) | |
807 { | |
694
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808 close(fdin); |
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809 close(fdout); |
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810 unlink(*tempname); |
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811 tempfile2zap = (char *)1; |
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812 free(*tempname); |
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813 *tempname = NULL; |
209 | 814 } |
815 | |
816 // Copy the rest of the data and replace the original with the copy. | |
817 void replace_tempfile(int fdin, int fdout, char **tempname) | |
818 { | |
694
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819 char *temp = xstrdup(*tempname); |
209 | 820 |
694
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821 temp[strlen(temp)-6]=0; |
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822 if (fdin != -1) { |
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823 xsendfile(fdin, fdout); |
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824 xclose(fdin); |
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825 } |
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826 xclose(fdout); |
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827 rename(*tempname, temp); |
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828 tempfile2zap = (char *)1; |
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829 free(*tempname); |
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830 free(temp); |
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831 *tempname = NULL; |
209 | 832 } |
334
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833 |
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834 // Create a 256 entry CRC32 lookup table. |
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835 |
337
aaafa1ceaa91
Add -N, -I, -L, and -P options to cksum.
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836 void crc_init(unsigned int *crc_table, int little_endian) |
334
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837 { |
694
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838 unsigned int i; |
334
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839 |
694
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840 // Init the CRC32 table (big endian) |
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841 for (i=0; i<256; i++) { |
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842 unsigned int j, c = little_endian ? i : i<<24; |
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843 for (j=8; j; j--) |
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844 if (little_endian) c = (c&1) ? (c>>1)^0xEDB88320 : c>>1; |
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845 else c=c&0x80000000 ? (c<<1)^0x04c11db7 : (c<<1); |
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846 crc_table[i] = c; |
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847 } |
334
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848 } |
419
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849 |
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850 // Quick and dirty query size of terminal, doesn't do ANSI probe fallback. |
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851 // set *x=0 and *y=0 before calling to detect failure to set either, or |
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852 // x=80 y=25 to provide defaults |
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853 |
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854 void terminal_size(unsigned *x, unsigned *y) |
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855 { |
694
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856 struct winsize ws; |
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857 int i; |
419
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858 |
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859 //memset(&ws, 0, sizeof(ws)); |
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860 for (i=0; i<3; i++) { |
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861 if (ioctl(i, TIOCGWINSZ, &ws)) continue; |
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862 if (x) *x = ws.ws_col; |
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863 if (y) *y = ws.ws_row; |
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864 } |
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865 if (x) { |
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866 char *s = getenv("COLUMNS"); |
419
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867 |
694
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868 i = s ? atoi(s) : 0; |
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869 if (i>0) *x = i; |
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|
870 } |
786841fdb1e0
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871 if (y) { |
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872 char *s = getenv("ROWS"); |
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parents:
399
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changeset
|
873 |
694
786841fdb1e0
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874 i = s ? atoi(s) : 0; |
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|
875 if (i>0) *y = i; |
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diff
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|
876 } |
419
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Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
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parents:
399
diff
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|
877 } |
af0cca0aba9d
Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
Rob Landley <rob@landley.net>
parents:
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diff
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|
878 |
af0cca0aba9d
Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
Rob Landley <rob@landley.net>
parents:
399
diff
changeset
|
879 // This should use a raw tty, fixit later. |
503
3b9dea897dc0
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Rob Landley <rob@landley.net>
parents:
498
diff
changeset
|
880 int yesno(char *prompt, int def) |
419
af0cca0aba9d
Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
Rob Landley <rob@landley.net>
parents:
399
diff
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|
881 { |
694
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|
882 FILE *fps[] = {stdin, stdout, stderr}; |
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|
883 int i; |
786841fdb1e0
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|
884 char buf; |
419
af0cca0aba9d
Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
Rob Landley <rob@landley.net>
parents:
399
diff
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|
885 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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|
886 for (i=0; i<3; i++) if (isatty(i)) break; |
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|
887 if (i == 3) return 1; |
419
af0cca0aba9d
Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
Rob Landley <rob@landley.net>
parents:
399
diff
changeset
|
888 |
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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|
889 fprintf(fps[i], "%s (%c/%c):", prompt, def ? 'Y' : 'y', def ? 'n' : 'N'); |
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|
890 fflush(fps[i]); |
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|
891 while (fread(&buf, 1, 1, fps[i])) { |
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|
892 if (tolower(buf) == 'y') def = 1; |
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893 if (tolower(buf) == 'n') def = 0; |
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|
894 else if (!isspace(buf)) continue; |
550
b2194045c40e
Remove "feature test macros", replace non-portable fdprintf() with standard fprintf().
Rob Landley <rob@landley.net>
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535
diff
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|
895 |
694
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|
896 break; |
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|
897 } |
550
b2194045c40e
Remove "feature test macros", replace non-portable fdprintf() with standard fprintf().
Rob Landley <rob@landley.net>
parents:
535
diff
changeset
|
898 |
694
786841fdb1e0
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parents:
671
diff
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|
899 return def; |
419
af0cca0aba9d
Quick and dirty terminal_size() and yesno() functions, both of which need to be improved.
Rob Landley <rob@landley.net>
parents:
399
diff
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|
900 } |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
parents:
443
diff
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|
901 |
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
parents:
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diff
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|
902 // 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).
Rob Landley <rob@landley.net>
parents:
475
diff
changeset
|
903 void for_each_pid_with_name_in(char **names, void (*callback)(pid_t pid)) |
f0b07ce5f125
Cleanups to pidof (including some global infrastructure shared with killall).
Rob Landley <rob@landley.net>
parents:
475
diff
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|
904 { |
694
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|
905 DIR *dp; |
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|
906 struct dirent *entry; |
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|
907 char cmd[sizeof(toybuf)], path[64]; |
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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|
908 char **curname; |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
parents:
443
diff
changeset
|
909 |
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
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|
910 if (!(dp = opendir("/proc"))) perror_exit("opendir"); |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
parents:
443
diff
changeset
|
911 |
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>
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|
912 while ((entry = readdir(dp))) { |
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Rob Landley <rob@landley.net>
parents:
671
diff
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|
913 int fd, n; |
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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|
914 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
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|
915 if (!isdigit(*entry->d_name)) continue; |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
parents:
443
diff
changeset
|
916 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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671
diff
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|
917 if (sizeof(path) <= snprintf(path, sizeof(path), "/proc/%s/cmdline", |
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
|
918 entry->d_name)) continue; |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
parents:
443
diff
changeset
|
919 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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671
diff
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|
920 if (-1 == (fd=open(path, O_RDONLY))) continue; |
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Rob Landley <rob@landley.net>
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671
diff
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|
921 n = read(fd, cmd, sizeof(cmd)); |
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>
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671
diff
changeset
|
922 close(fd); |
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
|
923 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>
parents:
443
diff
changeset
|
924 |
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
|
925 for (curname = names; *curname; curname++) |
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
|
926 if (!strcmp(basename(cmd), *curname)) callback(atol(entry->d_name)); |
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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|
927 } |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
parents:
443
diff
changeset
|
928 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
929 closedir(dp); |
475
1fb149e75ebf
Add killall by Andreas Heck, and factor out common pid code to lib.h.
Rob Landley <rob@landley.net>
parents:
443
diff
changeset
|
930 } |
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
|
931 |
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
|
932 struct signame { |
694
786841fdb1e0
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671
diff
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|
933 int num; |
786841fdb1e0
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parents:
671
diff
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|
934 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>
parents:
480
diff
changeset
|
935 }; |
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
|
936 |
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
|
937 // 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
changeset
|
938 // 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
|
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>
parents:
480
diff
changeset
|
940 #define SIGNIFY(x) {SIG##x, #x} |
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
|
941 |
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 static struct signame signames[] = { |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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671
diff
changeset
|
943 SIGNIFY(ABRT), SIGNIFY(ALRM), SIGNIFY(BUS), |
786841fdb1e0
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671
diff
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|
944 SIGNIFY(FPE), SIGNIFY(HUP), SIGNIFY(ILL), SIGNIFY(INT), SIGNIFY(KILL), |
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
945 SIGNIFY(PIPE), SIGNIFY(QUIT), SIGNIFY(SEGV), SIGNIFY(TERM), |
786841fdb1e0
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671
diff
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|
946 SIGNIFY(USR1), SIGNIFY(USR2), SIGNIFY(SYS), SIGNIFY(TRAP), |
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
947 SIGNIFY(VTALRM), SIGNIFY(XCPU), SIGNIFY(XFSZ), |
643
7bdebd2af1d6
Add signal handler to clean up tempfile.
Rob Landley <rob@landley.net>
parents:
640
diff
changeset
|
948 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
949 // Start of non-terminal signals |
643
7bdebd2af1d6
Add signal handler to clean up tempfile.
Rob Landley <rob@landley.net>
parents:
640
diff
changeset
|
950 |
694
786841fdb1e0
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|
951 SIGNIFY(CHLD), SIGNIFY(CONT), SIGNIFY(STOP), SIGNIFY(TSTP), |
786841fdb1e0
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671
diff
changeset
|
952 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.
Rob Landley <rob@landley.net>
parents:
480
diff
changeset
|
953 }; |
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
|
954 |
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
|
955 // not in posix: SIGNIFY(STKFLT), SIGNIFY(WINCH), SIGNIFY(IO), SIGNIFY(PWR) |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
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parents:
480
diff
changeset
|
956 // 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:
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diff
changeset
|
957 |
643
7bdebd2af1d6
Add signal handler to clean up tempfile.
Rob Landley <rob@landley.net>
parents:
640
diff
changeset
|
958 // Install the same handler on every signal that defaults to killing the process |
7bdebd2af1d6
Add signal handler to clean up tempfile.
Rob Landley <rob@landley.net>
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diff
changeset
|
959 void sigatexit(void *handler) |
7bdebd2af1d6
Add signal handler to clean up tempfile.
Rob Landley <rob@landley.net>
parents:
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diff
changeset
|
960 { |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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diff
changeset
|
961 int i; |
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Rob Landley <rob@landley.net>
parents:
671
diff
changeset
|
962 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:
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diff
changeset
|
963 } |
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:
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diff
changeset
|
964 // Convert name to signal number. If name == NULL print names. |
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:
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diff
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|
965 int sig_to_num(char *pidstr) |
c9aaceccd6bd
Factor out common code between killall/kill and move it to lib/lib.c, plus cleanups on kill.c.
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parents:
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diff
changeset
|
966 { |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
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diff
changeset
|
967 int i; |
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
|
968 |
694
786841fdb1e0
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|
969 if (pidstr) { |
786841fdb1e0
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Rob Landley <rob@landley.net>
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|
970 char *s; |
786841fdb1e0
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parents:
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|
971 i = strtol(pidstr, &s, 10); |
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diff
changeset
|
972 if (!*s) return i; |
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:
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diff
changeset
|
973 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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diff
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|
974 if (!strncasecmp(pidstr, "sig", 3)) pidstr+=3; |
786841fdb1e0
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Rob Landley <rob@landley.net>
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diff
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|
975 } |
786841fdb1e0
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diff
changeset
|
976 for (i = 0; i < sizeof(signames)/sizeof(struct signame); i++) |
786841fdb1e0
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671
diff
changeset
|
977 if (!pidstr) xputs(signames[i].name); |
786841fdb1e0
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671
diff
changeset
|
978 else if (!strcasecmp(pidstr, signames[i].name)) return signames[i].num; |
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
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|
979 |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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diff
changeset
|
980 return -1; |
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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diff
changeset
|
981 } |
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
|
982 |
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
|
983 char *num_to_sig(int sig) |
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:
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diff
changeset
|
984 { |
694
786841fdb1e0
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Rob Landley <rob@landley.net>
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diff
changeset
|
985 int i; |
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:
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diff
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|
986 |
694
786841fdb1e0
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diff
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|
987 for (i=0; i<sizeof(signames)/sizeof(struct signame); i++) |
786841fdb1e0
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parents:
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diff
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|
988 if (signames[i].num == sig) return signames[i].name; |
786841fdb1e0
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Rob Landley <rob@landley.net>
parents:
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|
989 return NULL; |
498
c9aaceccd6bd
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diff
changeset
|
990 } |
551
2548e6e590b2
Add string to mode_t parser
Daniel Walter <d.walter@0x90.at>
parents:
550
diff
changeset
|
991 |
643
7bdebd2af1d6
Add signal handler to clean up tempfile.
Rob Landley <rob@landley.net>
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diff
changeset
|
992 // premute mode bits based on posix mode strings. |
578
5cc8a8fc08b4
First pass at a complete rewrite of string_to_mode(). (It compiled!)
Rob Landley <rob@landley.net>
parents:
565
diff
changeset
|
993 mode_t string_to_mode(char *modestr, mode_t mode) |
551
2548e6e590b2
Add string to mode_t parser
Daniel Walter <d.walter@0x90.at>
parents:
550
diff
changeset
|
994 { |
694
786841fdb1e0
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671
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changeset
|
995 char *whos = "ogua", *hows = "=+-", *whats = "xwrstX", *whys = "ogu"; |
786841fdb1e0
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|
996 char *s, *str = modestr; |
553 | 997 |
694
786841fdb1e0
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|
998 // Handle octal mode |
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diff
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|
999 if (isdigit(*str)) { |
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changeset
|
1000 mode = strtol(str, &s, 8); |
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|
1001 if (*s || (mode & ~(07777))) goto barf; |
553 | 1002 |
694
786841fdb1e0
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|
1003 return mode; |
786841fdb1e0
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diff
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|
1004 } |
578
5cc8a8fc08b4
First pass at a complete rewrite of string_to_mode(). (It compiled!)
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565
diff
changeset
|
1005 |
694
786841fdb1e0
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diff
changeset
|
1006 // Gaze into the bin of permission... |
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|
1007 for (;;) { |
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diff
changeset
|
1008 int i, j, dowho, dohow, dowhat, amask; |
578
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|
1009 |
694
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|
1010 dowho = dohow = dowhat = amask = 0; |
578
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|
1011 |
694
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|
1012 // Find the who, how, and what stanzas, in that order |
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|
1013 while (*str && (s = strchr(whos, *str))) { |
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diff
changeset
|
1014 dowho |= 1<<(s-whos); |
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|
1015 str++; |
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|
1016 } |
786841fdb1e0
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|
1017 // If who isn't specified, like "a" but honoring umask. |
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|
1018 if (!dowho) { |
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|
1019 dowho = 8; |
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changeset
|
1020 umask(amask=umask(0)); |
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|
1021 } |
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|
1022 if (!*str || !(s = strchr(hows, *str))) goto barf; |
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parents:
671
diff
changeset
|
1023 dohow = *(str++); |
590
7becb497c3c4
Update chmod to work with new dirtree, and fix bugs in string_to_mode().
Rob Landley <rob@landley.net>
parents:
585
diff
changeset
|
1024 |
694
786841fdb1e0
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changeset
|
1025 if (!dohow) goto barf; |
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Rob Landley <rob@landley.net>
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diff
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|
1026 while (*str && (s = strchr(whats, *str))) { |
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changeset
|
1027 dowhat |= 1<<(s-whats); |
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diff
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|
1028 str++; |
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Rob Landley <rob@landley.net>
parents:
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diff
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|
1029 } |
578
5cc8a8fc08b4
First pass at a complete rewrite of string_to_mode(). (It compiled!)
Rob Landley <rob@landley.net>
parents:
565
diff
changeset
|
1030 |
694
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|
1031 // Convert X to x for directory or if already executable somewhere |
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|
1032 if ((dowhat&32) && (S_ISDIR(mode) || (mode&0111))) dowhat |= 1; |
578
5cc8a8fc08b4
First pass at a complete rewrite of string_to_mode(). (It compiled!)
Rob Landley <rob@landley.net>
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|
1033 |
694
786841fdb1e0
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changeset
|
1034 // Copy mode from another category? |
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diff
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|
1035 if (!dowhat && *str && (s = strchr(whys, *str))) { |
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diff
changeset
|
1036 dowhat = (mode>>(3*(s-whys)))&7; |
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diff
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|
1037 str++; |
786841fdb1e0
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671
diff
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|
1038 } |
578
5cc8a8fc08b4
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Rob Landley <rob@landley.net>
parents:
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diff
changeset
|
1039 |
694
786841fdb1e0
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1040 // Are we ready to do a thing yet? |
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1041 if (*str && *(str++) != ',') goto barf; |
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1042 |
694
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1043 // Ok, apply the bits to the mode. |
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1044 for (i=0; i<4; i++) { |
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1045 for (j=0; j<3; j++) { |
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1046 mode_t bit = 0; |
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1047 int where = 1<<((3*i)+j); |
638
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Make chmod +w respect umask, implement +s and +t, fix ls to show suid/sgid/stid without x bit.
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1048 |
694
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1049 if (amask & where) continue; |
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1050 |
694
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1051 // Figure out new value at this location |
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1052 if (i == 3) { |
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1053 // suid/sticky bit. |
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1054 if (j) { |
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1055 if ((dowhat & 8) && (dowho&(8|(1<<i)))) bit++; |
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1056 } else if (dowhat & 16) bit++; |
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1057 } else { |
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1058 if (!(dowho&(8|(1<<i)))) continue; |
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1059 if (dowhat&(1<<j)) bit++; |
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1060 } |
578
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1061 |
694
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1062 // When selection active, modify bit |
578
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1063 |
694
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1064 if (dohow == '=' || (bit && dohow == '-')) mode &= ~where; |
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1065 if (bit && dohow != '-') mode |= where; |
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1066 } |
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1067 } |
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1068 |
694
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1069 if (!*str) break; |
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1070 } |
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1071 return mode; |
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1072 barf: |
694
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1073 error_exit("bad mode '%s'", modestr); |
551
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1074 } |
658 | 1075 |
1076 | |
1077 char* make_human_readable(unsigned long long size, unsigned long unit) | |
1078 { | |
694
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1079 unsigned int frac = 0; |
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1080 if(unit) { |
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1081 size = (size/(unit)) + (size%(unit)?1:0); |
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1082 return xmsprintf("%llu", size); |
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1083 } |
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1084 else { |
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1085 static char units[] = {'\0', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'}; |
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1086 int index = 0; |
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1087 while(size >= 1024) { |
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1088 frac = size%1024; |
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1089 size /= 1024; |
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1090 index++; |
658 | 1091 } |
694
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1092 frac = (frac/102) + ((frac%102)?1:0); |
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1093 if(frac >= 10) { |
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1094 size += 1; |
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1095 frac = 0; |
658 | 1096 } |
694
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1097 if(frac) return xmsprintf("%llu.%u%c", size, frac, units[index]); |
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1098 else return xmsprintf("%llu%c", size, units[index]); |
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1099 } |
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1100 return NULL; //not reached |
658 | 1101 } |