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/* 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 <djm@gnu.ai.mit.edu>. */
#include <config.h>
#include <stdio.h>
#include <sys/types.h>
#include <getopt.h>
#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 <bug-fileutils@gnu.org>."));
}
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);
}
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