1 /* chgrp -- change group ownership of files
2 Copyright (C) 89, 90, 91, 1995-2001 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"
32 #include "chown-core.h"
34 /* The official name of this program (e.g., no `g' prefix). */
35 #define PROGRAM_NAME "chgrp"
37 #define AUTHORS "David MacKenzie"
39 /* MAXUID may come from limits.h *or* sys/params.h (via system.h) above. */
41 # define MAXUID UID_T_MAX
44 # define MAXGID GID_T_MAX
47 #ifndef _POSIX_VERSION
48 struct group *getgrnam ();
52 # define endgrent() ((void) 0)
55 /* The name the program was run with. */
58 /* The argument to the --reference option. Use the group ID of this file.
59 This file must exist. */
60 static char *reference_file;
62 /* For long options that have no equivalent short option, use a
63 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
66 REFERENCE_FILE_OPTION = CHAR_MAX + 1,
70 static struct option const long_options[] =
72 {"recursive", no_argument, 0, 'R'},
73 {"changes", no_argument, 0, 'c'},
74 {"dereference", no_argument, 0, DEREFERENCE_OPTION},
75 {"no-dereference", no_argument, 0, 'h'},
76 {"quiet", no_argument, 0, 'f'},
77 {"silent", no_argument, 0, 'f'},
78 {"reference", required_argument, 0, REFERENCE_FILE_OPTION},
79 {"verbose", no_argument, 0, 'v'},
80 {GETOPT_HELP_OPTION_DECL},
81 {GETOPT_VERSION_OPTION_DECL},
85 /* Set *G according to NAME. */
88 parse_group (const char *name, gid_t *g)
93 error (EXIT_FAILURE, 0, _("cannot change to null group"));
95 grp = getgrnam (name);
99 unsigned long int tmp_long;
101 if (!ISDIGIT (*name))
102 error (EXIT_FAILURE, 0, _("invalid group name %s"), quote (name));
104 s_err = xstrtoul (name, NULL, 0, &tmp_long, NULL);
105 if (s_err != LONGINT_OK)
106 STRTOL_FATAL_ERROR (name, _("group number"), s_err);
108 if (tmp_long > MAXGID)
109 error (EXIT_FAILURE, 0, _("invalid group number %s"), quote (name));
115 endgrent (); /* Save a file descriptor. */
122 fprintf (stderr, _("Try `%s --help' for more information.\n"),
127 Usage: %s [OPTION]... GROUP FILE...\n\
128 or: %s [OPTION]... --reference=RFILE FILE...\n\
130 program_name, program_name);
132 Change the group membership of each FILE to GROUP.\n\
134 -c, --changes like verbose but report only when a change is made\n\
135 --dereference affect the referent of each symbolic link, rather\n\
136 than the symbolic link itself\n\
139 -h, --no-dereference affect symbolic links instead of any referenced file\n\
140 (available only on systems that can change the\n\
141 ownership of a symlink)\n\
144 -f, --silent, --quiet suppress most error messages\n\
145 --reference=RFILE use RFILE's group rather than the specified\n\
147 -R, --recursive operate on files and directories recursively\n\
148 -v, --verbose output a diagnostic for every file processed\n\
150 fputs (HELP_OPTION_DESCRIPTION, stdout);
151 fputs (VERSION_OPTION_DESCRIPTION, stdout);
152 printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
158 main (int argc, char **argv)
163 struct Chown_option chopt;
165 program_name = argv[0];
166 setlocale (LC_ALL, "");
167 bindtextdomain (PACKAGE, LOCALEDIR);
168 textdomain (PACKAGE);
170 atexit (close_stdout);
174 while ((optc = getopt_long (argc, argv, "Rcfhv", long_options, NULL)) != -1)
180 case REFERENCE_FILE_OPTION:
181 reference_file = optarg;
183 case DEREFERENCE_OPTION:
184 chopt.dereference = DEREF_ALWAYS;
190 chopt.verbosity = V_changes_only;
193 chopt.force_silent = 1;
196 chopt.dereference = DEREF_NEVER;
199 chopt.verbosity = V_high;
201 case_GETOPT_HELP_CHAR;
202 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
208 if (argc - optind + (reference_file ? 1 : 0) <= 1)
210 error (0, 0, _("too few arguments"));
216 struct stat ref_stats;
217 if (stat (reference_file, &ref_stats))
218 error (EXIT_FAILURE, errno, _("failed to get attributes of %s"),
219 quote (reference_file));
221 chopt.group_name = gid_to_name (ref_stats.st_gid);
222 gid = ref_stats.st_gid;
226 chopt.group_name = argv[optind++];
227 parse_group (chopt.group_name, &gid);
230 for (; optind < argc; ++optind)
231 errors |= change_file_owner (1, argv[optind], (uid_t) -1, gid,
232 (uid_t) -1, (gid_t) -1, &chopt);