1 /* chgrp -- change group ownership of files
2 Copyright (C) 89, 90, 91, 1995-2000 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
22 #include <sys/types.h>
29 #include "group-member.h"
33 #include "chown-core.h"
35 /* The official name of this program (e.g., no `g' prefix). */
36 #define PROGRAM_NAME "chgrp"
38 #define AUTHORS "David MacKenzie"
40 /* MAXUID may come from limits.h *or* sys/params.h (via system.h) above. */
42 # define MAXUID UID_T_MAX
45 # define MAXGID GID_T_MAX
48 #ifndef _POSIX_VERSION
49 struct group *getgrnam ();
53 # define endgrent() ((void) 0)
58 /* The name the program was run with. */
61 /* The argument to the --reference option. Use the group ID of this file.
62 This file must exist. */
63 static char *reference_file;
65 /* For long options that have no equivalent short option, use a
66 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
69 REFERENCE_FILE_OPTION = CHAR_MAX + 1,
73 static struct option const long_options[] =
75 {"recursive", no_argument, 0, 'R'},
76 {"changes", no_argument, 0, 'c'},
77 {"dereference", no_argument, 0, DEREFERENCE_OPTION},
78 {"no-dereference", no_argument, 0, 'h'},
79 {"quiet", no_argument, 0, 'f'},
80 {"silent", no_argument, 0, 'f'},
81 {"reference", required_argument, 0, REFERENCE_FILE_OPTION},
82 {"verbose", no_argument, 0, 'v'},
83 {GETOPT_HELP_OPTION_DECL},
84 {GETOPT_VERSION_OPTION_DECL},
88 /* Set *G according to NAME. */
91 parse_group (const char *name, gid_t *g)
96 error (1, 0, _("can not change to null group"));
98 grp = getgrnam (name);
102 unsigned long int tmp_long;
104 if (!ISDIGIT (*name))
105 error (1, 0, _("invalid group name %s"), quote (name));
107 s_err = xstrtoul (name, NULL, 0, &tmp_long, NULL);
108 if (s_err != LONGINT_OK)
109 STRTOL_FATAL_ERROR (name, _("group number"), s_err);
111 if (tmp_long > MAXGID)
112 error (1, 0, _("invalid group number %s"), quote (name));
118 endgrent (); /* Save a file descriptor. */
125 fprintf (stderr, _("Try `%s --help' for more information.\n"),
130 Usage: %s [OPTION]... GROUP FILE...\n\
131 or: %s [OPTION]... --reference=RFILE FILE...\n\
133 program_name, program_name);
135 Change the group membership of each FILE to GROUP.\n\
137 -c, --changes like verbose but report only when a change is made\n\
138 --dereference affect the referent of each symbolic link, rather\n\
139 than the symbolic link itself\n\
140 -h, --no-dereference affect symbolic links instead of any referenced file\n\
141 (available only on systems that can change the\n\
142 ownership of a symlink)\n\
143 -f, --silent, --quiet suppress most error messages\n\
144 --reference=RFILE use RFILE's group rather than the specified\n\
146 -R, --recursive operate on files and directories recursively\n\
147 -v, --verbose output a diagnostic for every file processed\n\
148 --help display this help and exit\n\
149 --version output version information and exit\n\
151 puts (_("\nReport bugs to <bug-fileutils@gnu.org>."));
157 main (int argc, char **argv)
162 struct Chown_option chopt;
164 program_name = argv[0];
165 setlocale (LC_ALL, "");
166 bindtextdomain (PACKAGE, LOCALEDIR);
167 textdomain (PACKAGE);
169 atexit (close_stdout);
173 while ((optc = getopt_long (argc, argv, "Rcfhv", long_options, NULL)) != -1)
179 case REFERENCE_FILE_OPTION:
180 reference_file = optarg;
182 case DEREFERENCE_OPTION:
183 chopt.change_symlinks = 0;
189 chopt.verbosity = V_changes_only;
192 chopt.force_silent = 1;
195 chopt.change_symlinks = 1;
198 chopt.verbosity = V_high;
200 case_GETOPT_HELP_CHAR;
201 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
207 if (argc - optind + (reference_file ? 1 : 0) <= 1)
209 error (0, 0, _("too few arguments"));
215 struct stat ref_stats;
216 if (stat (reference_file, &ref_stats))
217 error (1, errno, _("getting attributes of %s"), quote (reference_file));
219 chopt.group_name = gid_to_name (ref_stats.st_gid);
220 group = ref_stats.st_gid;
224 chopt.group_name = argv[optind++];
225 parse_group (chopt.group_name, &group);
228 for (; optind < argc; ++optind)
229 errors |= change_file_owner (1, argv[optind], (uid_t) -1, group,
230 (uid_t) -1, (gid_t) -1, &chopt);