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annotate toys/posix/chgrp.c @ 1746:b11f536bac74 draft

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install -D bugfix from David Halls. (I tweaked some comment text while I was there.)
author Rob Landley <rob@landley.net>
date Sat, 21 Mar 2015 15:49:38 -0500
parents 90a7ed7ec30e
children
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1 /* chgrp.c - Change user and group ownership
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2 *
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3 * Copyright 2012 Georgi Chorbadzhiyski <georgi@unixsol.org>
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4 *
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5 * See http://opengroup.org/onlinepubs/9699919799/utilities/chown.html
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6 * See http://opengroup.org/onlinepubs/9699919799/utilities/chgrp.html
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7
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8 USE_CHGRP(NEWTOY(chgrp, "<2hPLHRfv[-HLP]", TOYFLAG_BIN))
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9 USE_CHOWN(OLDTOY(chown, chgrp, TOYFLAG_BIN))
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10
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11 config CHGRP
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12 bool "chgrp"
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13 default y
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14 help
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15 usage: chgrp/chown [-RHLP] [-fvh] group file...
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16
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17 Change group of one or more files.
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18
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19 -f suppress most error messages.
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20 -h change symlinks instead of what they point to
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21 -R recurse into subdirectories (implies -h).
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22 -H with -R change target of symlink, follow command line symlinks
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23 -L with -R change target of symlink, follow all symlinks
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24 -P with -R change symlink, do not follow symlinks (default)
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25 -v verbose output.
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27 config CHOWN
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28 bool "chown"
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29 default y
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30 help
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31 see: chgrp
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32 */
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33
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34 #define FOR_chgrp
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35 #define FORCE_FLAGS
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36 #include "toys.h"
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37
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38 GLOBALS(
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39 uid_t owner;
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40 gid_t group;
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41 char *owner_name, *group_name;
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42 int symfollow;
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43 )
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44
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45 static int do_chgrp(struct dirtree *node)
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46 {
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47 int fd, ret, flags = toys.optflags;
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49 // Depth first search
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50 if (!dirtree_notdotdot(node)) return 0;
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51 if ((flags & FLAG_R) && !node->again && S_ISDIR(node->st.st_mode))
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52 return DIRTREE_COMEAGAIN|((flags&FLAG_L) ? DIRTREE_SYMFOLLOW : 0);
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54 fd = dirtree_parentfd(node);
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55 ret = fchownat(fd, node->name, TT.owner, TT.group,
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56 (flags&(FLAG_L|FLAG_H)) || !(flags&(FLAG_h|FLAG_R))
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57 ? 0 : AT_SYMLINK_NOFOLLOW);
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59 if (ret || (flags & FLAG_v)) {
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60 char *path = dirtree_path(node, 0);
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61 if (flags & FLAG_v)
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62 xprintf("%s %s%s%s %s\n", toys.which->name,
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63 TT.owner_name ? TT.owner_name : "",
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64 toys.which->name[2]=='o' && TT.group_name ? ":" : "",
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65 TT.group_name ? TT.group_name : "", path);
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66 if (ret == -1 && !(toys.optflags & FLAG_f))
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67 perror_msg("'%s' to '%s:%s'", path, TT.owner_name, TT.group_name);
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68 free(path);
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69 }
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70 toys.exitval |= ret;
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72 return 0;
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73 }
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75 void chgrp_main(void)
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76 {
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77 int ischown = toys.which->name[2] == 'o', hl = toys.optflags&(FLAG_H|FLAG_L);
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78 char **s, *own;
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80 TT.owner = TT.group = -1;
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81
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82 // Distinguish chown from chgrp
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83 if (ischown) {
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84 char *grp;
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86 own = xstrdup(*toys.optargs);
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87 if ((grp = strchr(own, ':')) || (grp = strchr(own, '.'))) {
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88 *(grp++) = 0;
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89 TT.group_name = grp;
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90 }
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91 if (*own) TT.owner = xgetpwnamid(TT.owner_name = own)->pw_uid;
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92 } else TT.group_name = *toys.optargs;
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93
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94 if (TT.group_name && *TT.group_name)
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95 TT.group = xgetgrnamid(TT.group_name)->gr_gid;
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97 for (s=toys.optargs+1; *s; s++) {
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98 struct dirtree *new = dirtree_add_node(0, *s, hl);
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90e98cdb1b7c Make dirtree_handle_callback() start with dirtree_ like the rest of the dirtree functions.
Rob Landley <rob@landley.net>
parents: 735
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99 if (new) dirtree_handle_callback(new, do_chgrp);
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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: 674
diff changeset
100 else toys.exitval = 1;
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
101 }
1517
7dacf2eda737 Fix use-after-free spotted by Ashwini Sharma's static analysis.
Rob Landley <rob@landley.net>
parents: 1404
diff changeset
102
7dacf2eda737 Fix use-after-free spotted by Ashwini Sharma's static analysis.
Rob Landley <rob@landley.net>
parents: 1404
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103 if (CFG_TOYBOX_FREE && ischown) free(own);
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f11693d78764 New toys - chmod, chown, and chgrp.
Georgi Chorbadzhiyski <gf@unixsol.org>
parents:
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104 }
1655
45a612fb0ce6 Let chown build standalone.
Rob Landley <rob@landley.net>
parents: 1634
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105
45a612fb0ce6 Let chown build standalone.
Rob Landley <rob@landley.net>
parents: 1634
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106 void chown_main()
45a612fb0ce6 Let chown build standalone.
Rob Landley <rob@landley.net>
parents: 1634
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107 {
45a612fb0ce6 Let chown build standalone.
Rob Landley <rob@landley.net>
parents: 1634
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108 chgrp_main();
45a612fb0ce6 Let chown build standalone.
Rob Landley <rob@landley.net>
parents: 1634
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109 }