diff options
Diffstat (limited to 'src/chown.c')
-rw-r--r-- | src/chown.c | 44 |
1 files changed, 35 insertions, 9 deletions
diff --git a/src/chown.c b/src/chown.c index 48e07577c..54679a553 100644 --- a/src/chown.c +++ b/src/chown.c @@ -88,6 +88,10 @@ static char *username; /* The name of the group to which ownership of the files is being given. */ static char *groupname; +/* The argument to the --reference option. Use the owner and group IDs + of this file. This file must exist. */ +static char *reference_file; + /* If nonzero, display usage information and exit. */ static int show_help; @@ -101,6 +105,7 @@ static struct option const long_options[] = {"no-dereference", no_argument, 0, 'h'}, {"quiet", no_argument, 0, 'f'}, {"silent", no_argument, 0, 'f'}, + {"reference", required_argument, 0, 12}, {"verbose", no_argument, 0, 'v'}, {"help", no_argument, &show_help, 1}, {"version", no_argument, &show_version, 1}, @@ -233,9 +238,10 @@ usage (int status) { printf (_("\ Usage: %s [OPTION]... OWNER[.[GROUP]] FILE...\n\ - or: %s [OPTION]... .[GROUP] FILE...\n\ + or: %s [OPTION]... .GROUP FILE...\n\ + or: %s [OPTION]... --reference=RFILE FILE...\n\ "), - program_name, program_name); + program_name, program_name, program_name); printf (_("\ Change the owner and/or group of each FILE to OWNER and/or GROUP.\n\ \n\ @@ -244,6 +250,8 @@ Change the owner and/or group of each FILE to OWNER and/or GROUP.\n\ (available only on systems that can change the\n\ ownership of a symlink)\n\ -f, --silent, --quiet suppress most error messages\n\ + --reference=RFILE use the owner and group of RFILE instead of using\n\ + explicit OWNER.GROUP values\n\ -R, --recursive operate on files and directories recursively\n\ -v, --verbose explain what is being done\n\ --help display this help and exit\n\ @@ -279,6 +287,9 @@ main (int argc, char **argv) { case 0: break; + case 12: + reference_file = optarg; + break; case 'R': recurse = 1; break; @@ -309,7 +320,7 @@ main (int argc, char **argv) if (show_help) usage (0); - if (optind >= argc - 1) + if (argc - optind + (reference_file ? 1 : 0) <= 1) { error (0, 0, _("too few arguments")); usage (1); @@ -322,13 +333,28 @@ main (int argc, char **argv) } #endif - e = parse_user_spec (argv[optind], &user, &group, &username, &groupname); - if (e) - error (1, 0, "%s: %s", argv[optind], e); - if (username == NULL) - username = ""; + if (reference_file) + { + struct stat ref_stats; + + if (stat (reference_file, &ref_stats)) + error (1, errno, "%s", reference_file); + + user = ref_stats.st_uid; + group = ref_stats.st_gid; + } + else + { + e = parse_user_spec (argv[optind], &user, &group, &username, &groupname); + if (e) + error (1, 0, "%s: %s", argv[optind], e); + if (username == NULL) + username = ""; + + optind++; + } - for (++optind; optind < argc; ++optind) + for (; optind < argc; ++optind) { strip_trailing_slashes (argv[optind]); errors |= change_file_owner (argv[optind], user, group); |