coreutils/chgrp.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini chgrp implementation for busybox
   4  *
   5  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9 //config:config CHGRP
  10 //config:       bool "chgrp (7.2 kb)"
  11 //config:       default y
  12 //config:       help
  13 //config:       chgrp is used to change the group ownership of files.
  14
  15 //applet:IF_CHGRP(APPLET_NOEXEC(chgrp, chgrp, BB_DIR_BIN, BB_SUID_DROP, chgrp))
  16
  17 //kbuild:lib-$(CONFIG_CHGRP) += chgrp.o chown.o
  18
  19 /* BB_AUDIT SUSv3 defects - none? */
  20 /* BB_AUDIT GNU defects - unsupported long options. */
  21 /* http://www.opengroup.org/onlinepubs/007904975/utilities/chgrp.html */
  22
  23 //usage:#define chgrp_trivial_usage
  24 //usage:       "[-RhLHP"IF_DESKTOP("cvf")"]... GROUP FILE..."
  25 //usage:#define chgrp_full_usage "\n\n"
  26 //usage:       "Change the group membership of each FILE to GROUP\n"
  27 //usage:     "\n        -R      Recurse"
  28 //usage:     "\n        -h      Affect symlinks instead of symlink targets"
  29 //usage:     "\n        -L      Traverse all symlinks to directories"
  30 //usage:     "\n        -H      Traverse symlinks on command line only"
  31 //usage:     "\n        -P      Don't traverse symlinks (default)"
  32 //usage:        IF_DESKTOP(
  33 //usage:     "\n        -c      List changed files"
  34 //usage:     "\n        -v      Verbose"
  35 //usage:     "\n        -f      Hide errors"
  36 //usage:        )
  37 //usage:
  38 //usage:#define chgrp_example_usage
  39 //usage:       "$ ls -l /tmp/foo\n"
  40 //usage:       "-r--r--r--    1 andersen andersen        0 Apr 12 18:25 /tmp/foo\n"
  41 //usage:       "$ chgrp root /tmp/foo\n"
  42 //usage:       "$ ls -l /tmp/foo\n"
  43 //usage:       "-r--r--r--    1 andersen root            0 Apr 12 18:25 /tmp/foo\n"
  44
  45 #include "libbb.h"
  46
  47 /* This is a NOEXEC applet. Be very careful! */
  48
  49
  50 int chgrp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  51 int chgrp_main(int argc, char **argv)
  52 {
  53         /* "chgrp [opts] abc file(s)" == "chown [opts] :abc file(s)" */
  54         char **p = argv;
  55         while (*++p) {
  56                 if (p[0][0] != '-') {
  57                         p[0] = xasprintf(":%s", p[0]);
  58                         break;
  59                 }
  60         }
  61         return chown_main(argc, argv);
  62 }