/* chown -- change user and group ownership of files Copyright (C) 89, 90, 91, 1995-2000 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. */ /* | user | unchanged explicit -------------|-------------------------+-------------------------| g unchanged | --- | chown u | r |-------------------------+-------------------------| o explicit | chgrp g or chown .g | chown u.g | u |-------------------------+-------------------------| p from passwd| --- | chown u. | |-------------------------+-------------------------| Written by David MacKenzie . */ #include #include #include #include #include "system.h" #include "error.h" #include "lchown.h" #include "quote.h" #include "savedir.h" #include "chown-core.h" /* The official name of this program (e.g., no `g' prefix). */ #define PROGRAM_NAME "chown" #define AUTHORS "David MacKenzie" #ifndef _POSIX_VERSION struct passwd *getpwnam (); struct group *getgrnam (); struct group *getgrgid (); #endif #if ! HAVE_ENDPWENT # define endpwent() ((void) 0) #endif char *parse_user_spec (); void strip_trailing_slashes (); /* The name the program was run with. */ char *program_name; /* The argument to the --reference option. Use the owner and group IDs 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 { REFERENCE_FILE_OPTION = CHAR_MAX + 1, DEREFERENCE_OPTION, FROM_OPTION }; static struct option const long_options[] = { {"recursive", no_argument, 0, 'R'}, {"changes", no_argument, 0, 'c'}, {"dereference", no_argument, 0, DEREFERENCE_OPTION}, {"from", required_argument, 0, FROM_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} }; void usage (int status) { if (status != 0) fprintf (stderr, _("Try `%s --help' for more information.\n"), program_name); else { printf (_("\ Usage: %s [OPTION]... OWNER[:[GROUP]] FILE...\n\ or: %s [OPTION]... :GROUP FILE...\n\ or: %s [OPTION]... --reference=RFILE FILE...\n\ "), program_name, program_name, program_name); printf (_("\ Change the owner and/or group of each FILE to OWNER and/or GROUP.\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\ -h, --no-dereference affect symbolic links instead of any referenced file\n\ (available only on systems that can change the\n\ ownership of a symlink)\n\ --from=CURRENT_OWNER:CURRENT_GROUP\n\ change the owner and/or group of each file only if\n\ its current owner and/or group match those specified\n\ here. Either may be omitted, in which case a match\n\ is not required for the omitted attribute.\n\ -f, --silent, --quiet suppress most error messages\n\ --reference=RFILE use RFILE's owner and group rather than\n\ the specified OWNER:GROUP values\n\ -R, --recursive operate on files and directories recursively\n\ -v, --verbose output a diagnostic for every file processed\n\ --help display this help and exit\n\ --version output version information and exit\n\ \n\ Owner is unchanged if missing. Group is unchanged if missing, but changed\n\ to login group if implied by a `:'. OWNER and GROUP may be numeric as well\n\ as symbolic.\n\ ")); puts (_("\nReport bugs to .")); } exit (status); } int main (int argc, char **argv) { uid_t uid = (uid_t) -1; /* New uid; -1 if not to be changed. */ gid_t gid = (uid_t) -1; /* New gid; -1 if not to be changed. */ uid_t old_uid = (uid_t) -1; /* Old uid; -1 if unrestricted. */ gid_t old_gid = (uid_t) -1; /* Old gid; -1 if unrestricted. */ struct Chown_option chopt; int errors = 0; int optc; program_name = argv[0]; setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); atexit (close_stdout); chopt_init (&chopt); while ((optc = getopt_long (argc, argv, "Rcfhv", long_options, NULL)) != -1) { switch (optc) { case 0: break; case REFERENCE_FILE_OPTION: reference_file = optarg; break; case DEREFERENCE_OPTION: chopt.dereference = DEREF_ALWAYS; break; case FROM_OPTION: { char *u_dummy, *g_dummy; const char *e = parse_user_spec (argv[optind], &old_uid, &old_gid, &u_dummy, &g_dummy); if (e) error (1, 0, "%s: %s", quote (argv[optind]), e); break; } case 'R': chopt.recurse = 1; break; case 'c': chopt.verbosity = V_changes_only; break; case 'f': chopt.force_silent = 1; break; case 'h': chopt.dereference = DEREF_NEVER; break; case 'v': chopt.verbosity = V_high; break; case_GETOPT_HELP_CHAR; case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS); default: usage (1); } } if (argc - optind + (reference_file ? 1 : 0) <= 1) { error (0, 0, _("too few arguments")); usage (1); } if (reference_file) { struct stat ref_stats; if (stat (reference_file, &ref_stats)) error (1, errno, _("getting attributes of %s"), quote (reference_file)); uid = ref_stats.st_uid; gid = ref_stats.st_gid; chopt.user_name = uid_to_name (ref_stats.st_uid); chopt.group_name = gid_to_name (ref_stats.st_gid); } else { const char *e = parse_user_spec (argv[optind], &uid, &gid, &chopt.user_name, &chopt.group_name); if (e) error (1, 0, "%s: %s", argv[optind], e); /* FIXME: set it to the empty string? */ if (chopt.user_name == NULL) chopt.user_name = ""; optind++; } for (; optind < argc; ++optind) { strip_trailing_slashes (argv[optind]); errors |= change_file_owner (1, argv[optind], uid, gid, old_uid, old_gid, &chopt); } chopt_free (&chopt); exit (errors); }