Mercurial > hg > toybox
annotate toys/cp.c @ 262:70f36d9c5387
Add first pass at cp, totally untested, unlikely to work yet. :)
author | Rob Landley <rob@landley.net> |
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date | Wed, 20 Feb 2008 01:47:56 -0600 |
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children | 7c53152a483b |
rev | line source |
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262
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Add first pass at cp, totally untested, unlikely to work yet. :)
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1 /* vi: set sw=4 ts=4: |
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2 * |
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3 * cp.c - Copy files. |
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4 * |
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5 * Copyright 2008 Rob Landley <rob@landley.net> |
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6 * |
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7 * See http://www.opengroup.org/onlinepubs/009695399/utilities/cp.html |
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8 * |
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9 * "R+ra+d+p+r" |
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10 USE_HELLO(NEWTOY(hello, "<2rR+rdpa+d+p+rHLPif", TOYFLAG_BIN|TOYFLAG_UMASK)) |
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11 |
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12 config CP |
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13 bool "cp" |
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14 default n |
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15 help |
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16 usage: cp -f SOURCE... DEST |
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17 |
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18 Copy files from SOURCE to DEST. If more than one SOURCE, DEST must |
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19 be a directory. |
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20 |
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21 -f force copy by deleting destination file |
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22 -i interactive, prompt before overwriting existing DEST |
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23 -p preserve timestamps, ownership, and permissions |
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24 -r recurse into subdirectories (DEST must be a directory) |
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25 */ |
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26 |
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27 #include "toys.h" |
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28 |
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29 #define FLAG_f 1 |
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30 #define FLAG_i 2 |
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31 #define FLAG_P 4 |
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32 #define FLAG_L 8 |
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33 #define FLAG_H 16 |
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34 #define FLAG_a 32 |
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35 #define FLAG_p 64 |
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36 #define FLAG_d 128 |
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37 #define FLAG_R 256 |
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38 #define FLAG_r 512 |
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39 |
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40 DEFINE_GLOBALS( |
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41 char *destname; |
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42 int destisdir; |
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43 ) |
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44 |
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45 #define TT this.cp |
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46 |
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47 // Copy an individual file or directory to target. |
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48 |
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49 void cp_file(char *src, struct stat *srcst, int topdir, int again) |
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50 { |
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51 char *s = NULL; |
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52 int mode = (toys.optflags & FLAG_p) ? 0700 : 0777; |
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53 |
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54 // The second time we're called, chmod data. We can't do this on |
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55 // the first pass because we may copy files into a read-only directory. |
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56 if (again) { |
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57 if (toys.optflags & FLAG_p) { |
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58 struct utimbuf ut; |
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59 |
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60 // Inability to set these isn't fatal, some require root access. |
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61 // Can't do fchmod() etc here because -p works on mkdir, too. |
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62 chown(s, srcst->st_uid, srcst->st_gid); |
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63 chmod(s, srcst->st_mode); |
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64 ut.actime = srcst->st_atime; |
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65 ut.modtime = srcst->st_mtime; |
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66 utime(s, &ut); |
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67 } |
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68 return; |
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69 } |
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70 |
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71 // Trim path from name if necessary. |
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72 if (topdir) s = strrchr(src, '/'); |
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73 if (!s) s=src; |
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74 |
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75 // Determine location to create new file/directory at. |
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76 if (TT.destisdir) s = xmsprintf(toybuf, "%s/%s", TT.destname, s); |
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77 else s = xstrdup(TT.destname); |
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78 |
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79 // Copy directory or file to destination. |
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80 if (S_ISDIR(srcst->st_mode)) { |
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81 if (mkdir(s, mode)) perror_exit("mkdir '%s'", s); |
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82 } else { |
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83 int fdin, fdout; |
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84 fdin = xopen(src, O_RDONLY); |
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85 fdout = xcreate(s, O_CREAT|O_TRUNC, mode); |
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86 xsendfile(fdin, fdout); |
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87 close(fdin); |
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88 xclose(fdout); |
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89 } |
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90 } |
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91 |
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92 // Callback from dirtree_read() for each file/directory under a source dir. |
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93 |
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94 int cp_node(struct dirtree *node, int after) |
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95 { |
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96 cp_file(node->name, &(node->st), 0, after); |
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97 return 0; |
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98 } |
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99 |
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100 void cp_main(void) |
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101 { |
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102 struct stat st; |
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103 int i; |
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104 |
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105 // Grab target argument. (Guaranteed to be there due to "<2" above.) |
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106 |
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107 TT.destname = toys.optargs[--toys.optc]; |
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108 |
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109 // If destination doesn't exist, are we ok with that? |
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110 if (stat(TT.destname, &st)) { |
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111 if (toys.optc>1) goto error_notdir; |
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112 |
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113 // If destination exists... |
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114 } else { |
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115 if (S_ISDIR(st.st_mode)) TT.destisdir++; |
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116 else if (toys.optc > 1) goto error_notdir; |
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117 } |
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118 |
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119 // Handle sources |
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120 for (i=0; i<toys.optc; i++) { |
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121 char *src = toys.optargs[i]; |
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122 |
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123 // Skip nonexistent sources... |
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124 if (!((toys.optflags & FLAG_d) ? lstat(src, &st) : stat(src, &st))) { |
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125 perror_msg("'%s'", src); |
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126 toys.exitval = 1; |
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127 continue; |
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128 } |
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129 |
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130 // Copy directory or file. |
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131 if (S_ISDIR(st.st_mode)) { |
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132 if (toys.optflags & FLAG_r) { |
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133 cp_file(src, &st, 1, 0); |
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134 dirtree_read(src, NULL, cp_node); |
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135 cp_file(src, &st, 1, 1); |
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136 } else error_msg("Skipped dir '%s'", src); |
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137 } else { |
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138 cp_file(src, &st, 1, 0); |
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139 cp_file(src, &st, 1, 1); |
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140 } |
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141 } |
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142 return; |
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143 |
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144 error_notdir: |
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145 error_exit("'%s' isn't a directory", TT.destname); |
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146 } |