/* chgrp -- change group ownership of files Copyright (C) 89, 90, 91, 1995-2003 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Written by David MacKenzie . */ #include #include #include #include #include #include "system.h" #include "chown-core.h" #include "error.h" #include "fts_.h" #include "group-member.h" #include "lchown.h" #include "quote.h" #include "xstrtol.h" /* The official name of this program (e.g., no `g' prefix). */ #define PROGRAM_NAME "chgrp" #define AUTHORS "David MacKenzie", "Jim Meyering" #ifndef _POSIX_VERSION struct group *getgrnam (); #endif #if ! HAVE_ENDGRENT # define endgrent() ((void) 0) #endif /* The name the program was run with. */ char *program_name; /* The argument to the --reference option. Use the group ID of this file. This file must exist. */ static char *reference_file; /* For long options that have no equivalent short option, use a non-character as a pseudo short option, starting with CHAR_MAX + 1. */ enum { DEREFERENCE_OPTION = CHAR_MAX + 1, REFERENCE_FILE_OPTION }; static struct option const long_options[] = { {"recursive", no_argument, 0, 'R'}, {"changes", no_argument, 0, 'c'}, {"dereference", no_argument, 0, DEREFERENCE_OPTION}, {"no-dereference", no_argument, 0, 'h'}, {"quiet", no_argument, 0, 'f'}, {"silent", no_argument, 0, 'f'}, {"reference", required_argument, 0, REFERENCE_FILE_OPTION}, {"verbose", no_argument, 0, 'v'}, {GETOPT_HELP_OPTION_DECL}, {GETOPT_VERSION_OPTION_DECL}, {0, 0, 0, 0} }; /* Set *G according to NAME. */ static void parse_group (const char *name, gid_t *g) { struct group *grp; if (*name == '\0') error (EXIT_FAILURE, 0, _("cannot change to null group")); grp = getgrnam (name); if (grp == NULL) { strtol_error s_err; unsigned long int tmp_long; if (!ISDIGIT (*name)) error (EXIT_FAILURE, 0, _("invalid group name %s"), quote (name)); s_err = xstrtoul (name, NULL, 0, &tmp_long, NULL); if (s_err != LONGINT_OK) STRTOL_FATAL_ERROR (name, _("group number"), s_err); if (tmp_long > GID_T_MAX) error (EXIT_FAILURE, 0, _("invalid group number %s"), quote (name)); *g = tmp_long; } else *g = grp->gr_gid; endgrent (); /* Save a file descriptor. */ } void usage (int status) { if (status != 0) fprintf (stderr, _("Try `%s --help' for more information.\n"), program_name); else { printf (_("\ Usage: %s [OPTION]... GROUP FILE...\n\ or: %s [OPTION]... --reference=RFILE FILE...\n\ "), program_name, program_name); fputs (_("\ Change the group of each FILE to GROUP.\n\ With --reference, change the group of each FILE to that of RFILE.\n\ \n\ -c, --changes like verbose but report only when a change is made\n\ --dereference affect the referent of each symbolic link, rather\n\ than the symbolic link itself\n\ "), stdout); fputs (_("\ -h, --no-dereference affect each symbolic link instead of any referenced\n\ file (useful only on systems that can change the\n\ ownership of a symlink)\n\ "), stdout); fputs (_("\ --no-preserve-root do not treat `/' specially (the default)\n\ --preserve-root fail to operate recursively on `/'\n\ "), stdout); fputs (_("\ -f, --silent, --quiet suppress most error messages\n\ --reference=RFILE use RFILE's group rather than the specifying\n\ GROUP value\n\ -R, --recursive operate on files and directories recursively\n\ -v, --verbose output a diagnostic for every file processed\n\ \n\ "), stdout); fputs (_("\ The following options modify how a hierarchy is traversed when the -R\n\ option is also specified. If more than one is specified, only the final\n\ one takes effect.\n\ \n\ -H if a command line argument is a symbolic link\n\ to a directory, traverse it\n\ -L traverse every symbolic link to a directory\n\ encountered\n\ -P do not traverse any symbolic links (default)\n\ \n\ "), stdout); fputs (HELP_OPTION_DESCRIPTION, stdout); fputs (VERSION_OPTION_DESCRIPTION, stdout); printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT); } exit (status); } int main (int argc, char **argv) { gid_t gid; /* Bit flags that control how fts works. */ int bit_flags = FTS_PHYSICAL; struct Chown_option chopt; int fail = 0; int optc; initialize_main (&argc, &argv); program_name = argv[0]; setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); atexit (close_stdout); chopt_init (&chopt); while ((optc = getopt_long (argc, argv, "HLPRcfhv", long_options, NULL)) != -1) { switch (optc) { case 0: break; case 'H': /* Traverse command-line symlinks-to-directories. */ bit_flags = FTS_COMFOLLOW; break; case 'L': /* Traverse all symlinks-to-directories. */ bit_flags = FTS_LOGICAL; break; case 'P': /* Traverse no symlinks-to-directories. */ bit_flags = FTS_PHYSICAL; break; case 'h': /* --no-dereference: affect symlinks */ chopt.affect_symlink_referent = false; break; case DEREFERENCE_OPTION: /* --dereference: affect the referent of each symlink */ chopt.affect_symlink_referent = true; break; case REFERENCE_FILE_OPTION: reference_file = optarg; break; case 'R': chopt.recurse = true; break; case 'c': chopt.verbosity = V_changes_only; break; case 'f': chopt.force_silent = true; break; case 'v': chopt.verbosity = V_high; break; case_GETOPT_HELP_CHAR; case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS); default: usage (EXIT_FAILURE); } } if (argc - optind + (reference_file ? 1 : 0) <= 1) { error (0, 0, _("too few arguments")); usage (EXIT_FAILURE); } if (reference_file) { struct stat ref_stats; if (stat (reference_file, &ref_stats)) error (EXIT_FAILURE, errno, _("failed to get attributes of %s"), quote (reference_file)); chopt.group_name = gid_to_name (ref_stats.st_gid); gid = ref_stats.st_gid; } else { chopt.group_name = argv[optind++]; parse_group (chopt.group_name, &gid); } fail = chown_files (argv + optind, bit_flags, (uid_t) -1, gid, (uid_t) -1, (gid_t) -1, &chopt); chopt_free (&chopt); exit (fail ? EXIT_FAILURE : EXIT_SUCCESS); }