[thirdparty/e2fsprogs.git] / misc / chattr.c

/*
 * chattr.c		- Change file attributes on an ext2 file system
 *
 * Copyright (C) 1993, 1994  Remy Card <card@masi.ibp.fr>
 *                           Laboratoire MASI, Institut Blaise Pascal
 *                           Universite Pierre et Marie Curie (Paris VI)
 *
 * This file can be redistributed under the terms of the GNU General
 * Public License
 */

/*
 * History:
 * 93/10/30	- Creation
 * 93/11/13	- Replace stat() calls by lstat() to avoid loops
 * 94/02/27	- Integrated in Ted's distribution
 * 98/12/29	- Ignore symlinks when working recursively (G M Sipe)
 * 98/12/29	- Display version info only when -V specified (G M Sipe)
 */

#define _LARGEFILE64_SOURCE

#include "config.h"
#include <sys/types.h>
#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <sys/param.h>
#include <sys/stat.h>
#include "ext2fs/ext2_fs.h"

#ifdef __GNUC__
#define EXT2FS_ATTR(x) __attribute__(x)
#else
#define EXT2FS_ATTR(x)
#endif

#ifndef S_ISLNK			/* So we can compile even with gcc-warn */
# ifdef __S_IFLNK
#  define S_ISLNK(mode)	 __S_ISTYPE((mode), __S_IFLNK)
# else
#  define S_ISLNK(mode)  0
# endif
#endif

#include "et/com_err.h"
#include "e2p/e2p.h"

#include "../version.h"
#include "nls-enable.h"

static const char * program_name = "chattr";

static int add;
static int rem;
static int set;
static int set_version;

static unsigned long version;

static int recursive;
static int verbose;
static int silent;

static unsigned long af;
static unsigned long rf;
static unsigned long sf;

#ifdef _LFS64_LARGEFILE
#define LSTAT		lstat64
#define STRUCT_STAT	struct stat64
#else
#define LSTAT		lstat
#define STRUCT_STAT	struct stat
#endif

static void usage(void)
{
	fprintf(stderr,
		_("Usage: %s [-RVf] [-+=AacDdeijsSu] [-v version] files...\n"),
		program_name);
	exit(1);
}

struct flags_char {
	unsigned long	flag;
	char 		optchar;
};

static const struct flags_char flags_array[] = {
	{ EXT2_NOATIME_FL, 'A' },
	{ EXT2_SYNC_FL, 'S' },
	{ EXT2_DIRSYNC_FL, 'D' },
	{ EXT2_APPEND_FL, 'a' },
	{ EXT2_COMPR_FL, 'c' },
	{ EXT2_NODUMP_FL, 'd' },
	{ EXT4_EXTENTS_FL, 'e'},
	{ EXT2_IMMUTABLE_FL, 'i' },
	{ EXT3_JOURNAL_DATA_FL, 'j' },
	{ EXT2_SECRM_FL, 's' },
	{ EXT2_UNRM_FL, 'u' },
	{ EXT2_NOTAIL_FL, 't' },
	{ EXT2_TOPDIR_FL, 'T' },
	{ FS_NOCOW_FL, 'C' },
	{ 0, 0 }
};

static unsigned long get_flag(char c)
{
	const struct flags_char *fp;

	for (fp = flags_array; fp->flag != 0; fp++) {
		if (fp->optchar == c)
			return fp->flag;
	}
	return 0;
}


static int decode_arg (int * i, int argc, char ** argv)
{
	char * p;
	char * tmp;
	unsigned long fl;

	switch (argv[*i][0])
	{
	case '-':
		for (p = &argv[*i][1]; *p; p++) {
			if (*p == 'R') {
				recursive = 1;
				continue;
			}
			if (*p == 'V') {
				verbose = 1;
				continue;
			}
			if (*p == 'f') {
				silent = 1;
				continue;
			}
			if (*p == 'v') {
				(*i)++;
				if (*i >= argc)
					usage ();
				version = strtol (argv[*i], &tmp, 0);
				if (*tmp) {
					com_err (program_name, 0,
						 _("bad version - %s\n"),
						 argv[*i]);
					usage ();
				}
				set_version = 1;
				continue;
			}
			if ((fl = get_flag(*p)) == 0)
				usage();
			rf |= fl;
			rem = 1;
		}
		break;
	case '+':
		add = 1;
		for (p = &argv[*i][1]; *p; p++) {
			if ((fl = get_flag(*p)) == 0)
				usage();
			af |= fl;
		}
		break;
	case '=':
		set = 1;
		for (p = &argv[*i][1]; *p; p++) {
			if ((fl = get_flag(*p)) == 0)
				usage();
			sf |= fl;
		}
		break;
	default:
		return EOF;
		break;
	}
	return 1;
}

static int chattr_dir_proc(const char *, struct dirent *, void *);

static int change_attributes(const char * name)
{
	unsigned long flags;
	STRUCT_STAT	st;
	int extent_file = 0;

	if (LSTAT (name, &st) == -1) {
		if (!silent)
			com_err (program_name, errno,
				 _("while trying to stat %s"), name);
		return -1;
	}

	if (fgetflags(name, &flags) == -1) {
		if (!silent)
			com_err(program_name, errno,
					_("while reading flags on %s"), name);
		return -1;
	}
	if (flags & EXT4_EXTENTS_FL)
		extent_file = 1;
	if (set) {
		if (extent_file && !(sf & EXT4_EXTENTS_FL)) {
			if (!silent)
				com_err(program_name, 0,
				_("Clearing extent flag not supported on %s"),
					name);
			return -1;
		}
		if (verbose) {
			printf (_("Flags of %s set as "), name);
			print_flags (stdout, sf, 0);
			printf ("\n");
		}
		if (fsetflags (name, sf) == -1)
			perror (name);
	} else {
		if (rem)
			flags &= ~rf;
		if (add)
			flags |= af;
		if (extent_file && !(flags & EXT4_EXTENTS_FL)) {
			if (!silent)
				com_err(program_name, 0,
				_("Clearing extent flag not supported on %s"),
					name);
			return -1;
		}
		if (verbose) {
			printf(_("Flags of %s set as "), name);
			print_flags(stdout, flags, 0);
			printf("\n");
		}
		if (!S_ISDIR(st.st_mode))
			flags &= ~EXT2_DIRSYNC_FL;
		if (fsetflags(name, flags) == -1) {
			if (!silent) {
				com_err(program_name, errno,
						_("while setting flags on %s"),
						name);
			}
			return -1;
		}
	}
	if (set_version) {
		if (verbose)
			printf (_("Version of %s set as %lu\n"), name, version);
		if (fsetversion (name, version) == -1) {
			if (!silent)
				com_err (program_name, errno,
					 _("while setting version on %s"),
					 name);
			return -1;
		}
	}
	if (S_ISDIR(st.st_mode) && recursive)
		return iterate_on_dir (name, chattr_dir_proc, NULL);
	return 0;
}

static int chattr_dir_proc (const char * dir_name, struct dirent * de,
			    void * private EXT2FS_ATTR((unused)))
{
	int ret = 0;

	if (strcmp (de->d_name, ".") && strcmp (de->d_name, "..")) {
	        char *path;

		path = malloc(strlen (dir_name) + 1 + strlen (de->d_name) + 1);
		if (!path) {
			fprintf(stderr, _("Couldn't allocate path variable "
					  "in chattr_dir_proc"));
			return -1;
		}
		sprintf(path, "%s/%s", dir_name, de->d_name);
		ret = change_attributes(path);
		free(path);
	}
	return ret;
}

int main (int argc, char ** argv)
{
	int i, j;
	int end_arg = 0;
	int err, retval = 0;

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
	set_com_err_gettext(gettext);
#endif
	if (argc && *argv)
		program_name = *argv;
	i = 1;
	while (i < argc && !end_arg) {
		/* '--' arg should end option processing */
		if (strcmp(argv[i], "--") == 0) {
			i++;
			end_arg = 1;
		} else if (decode_arg (&i, argc, argv) == EOF)
			end_arg = 1;
		else
			i++;
	}
	if (i >= argc)
		usage ();
	if (set && (add || rem)) {
		fputs(_("= is incompatible with - and +\n"), stderr);
		exit (1);
	}
	if ((rf & af) != 0) {
		fputs("Can't both set and unset same flag.\n", stderr);
		exit (1);
	}
	if (!(add || rem || set || set_version)) {
		fputs(_("Must use '-v', =, - or +\n"), stderr);
		exit (1);
	}
	if (verbose)
		fprintf (stderr, "chattr %s (%s)\n",
			 E2FSPROGS_VERSION, E2FSPROGS_DATE);
	for (j = i; j < argc; j++) {
		err = change_attributes (argv[j]);
		if (err)
			retval = 1;
	}
	exit(retval);
}
Commit	Line	Data
3839e657 TT	1	/*
	2	* chattr.c - Change file attributes on an ext2 file system
	3	*
	4	* Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
	5	* Laboratoire MASI, Institut Blaise Pascal
	6	* Universite Pierre et Marie Curie (Paris VI)
	7	*
	8	* This file can be redistributed under the terms of the GNU General
	9	* Public License
	10	*/
	11
	12	/*
	13	* History:
	14	* 93/10/30 - Creation
	15	* 93/11/13 - Replace stat() calls by lstat() to avoid loops
	16	* 94/02/27 - Integrated in Ted's distribution
a88fa0c0 TT	17	* 98/12/29 - Ignore symlinks when working recursively (G M Sipe)
a88fa0c0 TT	18	* 98/12/29 - Display version info only when -V specified (G M Sipe)
3839e657 TT	19	*/
3839e657 TT	20
fff18b4e	21	#define _LARGEFILE64_SOURCE
fff18b4e	22
d1154eb4	23	#include "config.h"
a418d3ad	24	#include <sys/types.h>
3839e657 TT	25	#include <dirent.h>
3839e657 TT	26	#include <fcntl.h>
3839e657 TT	27	#include <stdio.h>
	28	#include <stdlib.h>
	29	#include <unistd.h>
19c78dc0	30	#include <string.h>
a418d3ad TT	31	#ifdef HAVE_ERRNO_H
	32	#include <errno.h>
	33	#endif
3839e657 TT	34	#include <sys/param.h>
3839e657 TT	35	#include <sys/stat.h>
54c637d4	36	#include "ext2fs/ext2_fs.h"
3839e657	37
54434927 TT	38	#ifdef __GNUC__
	39	#define EXT2FS_ATTR(x) __attribute__(x)
	40	#else
	41	#define EXT2FS_ATTR(x)
	42	#endif
	43
36caf25f TT	44	#ifndef S_ISLNK /* So we can compile even with gcc-warn */
	45	# ifdef __S_IFLNK
	46	# define S_ISLNK(mode) __S_ISTYPE((mode), __S_IFLNK)
	47	# else
	48	# define S_ISLNK(mode) 0
	49	# endif
	50	#endif
	51
3839e657 TT	52	#include "et/com_err.h"
	53	#include "e2p/e2p.h"
	54
	55	#include "../version.h"
d9c56d3c	56	#include "nls-enable.h"
3839e657	57
e1a0a3e3	58	static const char * program_name = "chattr";
3839e657	59
9a718849 TT	60	static int add;
	61	static int rem;
	62	static int set;
	63	static int set_version;
3839e657	64
e1a0a3e3	65	static unsigned long version;
3839e657	66
9a718849 TT	67	static int recursive;
9a718849 TT	68	static int verbose;
e68594d2	69	static int silent;
3839e657	70
e1a0a3e3 TT	71	static unsigned long af;
	72	static unsigned long rf;
	73	static unsigned long sf;
3839e657	74
b705640a TT	75	#ifdef _LFS64_LARGEFILE
	76	#define LSTAT lstat64
	77	#define STRUCT_STAT struct stat64
	78	#else
	79	#define LSTAT lstat
	80	#define STRUCT_STAT struct stat
	81	#endif
	82
642935c0	83	static void usage(void)
3839e657	84	{
e68594d2	85	fprintf(stderr,
7c8da6e3	86	_("Usage: %s [-RVf] [-+=AacDdeijsSu] [-v version] files...\n"),
642935c0 TT	87	program_name);
642935c0 TT	88	exit(1);
3839e657 TT	89	}
3839e657 TT	90
9a718849 TT	91	struct flags_char {
	92	unsigned long flag;
	93	char optchar;
	94	};
	95
	96	static const struct flags_char flags_array[] = {
	97	{ EXT2_NOATIME_FL, 'A' },
	98	{ EXT2_SYNC_FL, 'S' },
88372d5c	99	{ EXT2_DIRSYNC_FL, 'D' },
9a718849 TT	100	{ EXT2_APPEND_FL, 'a' },
	101	{ EXT2_COMPR_FL, 'c' },
	102	{ EXT2_NODUMP_FL, 'd' },
7c8da6e3	103	{ EXT4_EXTENTS_FL, 'e'},
9a718849 TT	104	{ EXT2_IMMUTABLE_FL, 'i' },
	105	{ EXT3_JOURNAL_DATA_FL, 'j' },
	106	{ EXT2_SECRM_FL, 's' },
	107	{ EXT2_UNRM_FL, 'u' },
b3f5b4c2	108	{ EXT2_NOTAIL_FL, 't' },
15f9011a	109	{ EXT2_TOPDIR_FL, 'T' },
0796e660	110	{ FS_NOCOW_FL, 'C' },
9a718849 TT	111	{ 0, 0 }
	112	};
	113
	114	static unsigned long get_flag(char c)
	115	{
	116	const struct flags_char *fp;
efc6f628	117
9a718849 TT	118	for (fp = flags_array; fp->flag != 0; fp++) {
	119	if (fp->optchar == c)
	120	return fp->flag;
	121	}
	122	return 0;
	123	}
	124
	125
3839e657 TT	126	static int decode_arg (int * i, int argc, char ** argv)
	127	{
	128	char * p;
	129	char * tmp;
9a718849	130	unsigned long fl;
3839e657 TT	131
	132	switch (argv[*i][0])
	133	{
	134	case '-':
9a718849 TT	135	for (p = &argv[i][1]; p; p++) {
9a718849 TT	136	if (*p == 'R') {
3839e657	137	recursive = 1;
9a718849 TT	138	continue;
	139	}
	140	if (*p == 'V') {
3839e657	141	verbose = 1;
9a718849 TT	142	continue;
9a718849 TT	143	}
e68594d2 TT	144	if (*p == 'f') {
	145	silent = 1;
	146	continue;
	147	}
9a718849	148	if (*p == 'v') {
1e3472c5	149	(*i)++;
3839e657 TT	150	if (*i >= argc)
3839e657 TT	151	usage ();
3839e657	152	version = strtol (argv[*i], &tmp, 0);
9a718849	153	if (*tmp) {
3839e657	154	com_err (program_name, 0,
e68594d2	155	_("bad version - %s\n"),
9a718849	156	argv[*i]);
3839e657 TT	157	usage ();
	158	}
	159	set_version = 1;
9a718849	160	continue;
3839e657	161	}
9a718849 TT	162	if ((fl = get_flag(*p)) == 0)
	163	usage();
	164	rf \|= fl;
	165	rem = 1;
	166	}
3839e657 TT	167	break;
	168	case '+':
	169	add = 1;
9a718849 TT	170	for (p = &argv[i][1]; p; p++) {
	171	if ((fl = get_flag(*p)) == 0)
	172	usage();
	173	af \|= fl;
	174	}
3839e657 TT	175	break;
	176	case '=':
	177	set = 1;
9a718849 TT	178	for (p = &argv[i][1]; p; p++) {
	179	if ((fl = get_flag(*p)) == 0)
	180	usage();
	181	sf \|= fl;
	182	}
3839e657 TT	183	break;
	184	default:
	185	return EOF;
	186	break;
	187	}
	188	return 1;
	189	}
	190
2d328bb7	191	static int chattr_dir_proc(const char , struct dirent , void *);
3839e657	192
2d328bb7	193	static int change_attributes(const char * name)
3839e657 TT	194	{
3839e657 TT	195	unsigned long flags;
b705640a	196	STRUCT_STAT st;
7c8da6e3	197	int extent_file = 0;
3839e657	198
b705640a	199	if (LSTAT (name, &st) == -1) {
e68594d2 TT	200	if (!silent)
	201	com_err (program_name, errno,
	202	_("while trying to stat %s"), name);
	203	return -1;
3839e657	204	}
e1a0a3e3	205
7c8da6e3 AK	206	if (fgetflags(name, &flags) == -1) {
	207	if (!silent)
	208	com_err(program_name, errno,
	209	_("while reading flags on %s"), name);
	210	return -1;
	211	}
	212	if (flags & EXT4_EXTENTS_FL)
	213	extent_file = 1;
e1a0a3e3	214	if (set) {
7c8da6e3 AK	215	if (extent_file && !(sf & EXT4_EXTENTS_FL)) {
	216	if (!silent)
	217	com_err(program_name, 0,
	218	_("Clearing extent flag not supported on %s"),
	219	name);
	220	return -1;
	221	}
e1a0a3e3	222	if (verbose) {
d9c56d3c	223	printf (_("Flags of %s set as "), name);
f3db3566	224	print_flags (stdout, sf, 0);
3839e657 TT	225	printf ("\n");
	226	}
	227	if (fsetflags (name, sf) == -1)
	228	perror (name);
e1a0a3e3	229	} else {
7c8da6e3 AK	230	if (rem)
	231	flags &= ~rf;
	232	if (add)
	233	flags \|= af;
	234	if (extent_file && !(flags & EXT4_EXTENTS_FL)) {
e68594d2	235	if (!silent)
7c8da6e3 AK	236	com_err(program_name, 0,
	237	_("Clearing extent flag not supported on %s"),
	238	name);
e68594d2	239	return -1;
7c8da6e3 AK	240	}
	241	if (verbose) {
	242	printf(_("Flags of %s set as "), name);
	243	print_flags(stdout, flags, 0);
	244	printf("\n");
	245	}
	246	if (!S_ISDIR(st.st_mode))
	247	flags &= ~EXT2_DIRSYNC_FL;
	248	if (fsetflags(name, flags) == -1) {
	249	if (!silent) {
	250	com_err(program_name, errno,
e68594d2 TT	251	_("while setting flags on %s"),
e68594d2 TT	252	name);
e68594d2	253	}
7c8da6e3	254	return -1;
3839e657 TT	255	}
3839e657 TT	256	}
e1a0a3e3	257	if (set_version) {
3839e657	258	if (verbose)
d9c56d3c	259	printf (_("Version of %s set as %lu\n"), name, version);
e68594d2 TT	260	if (fsetversion (name, version) == -1) {
	261	if (!silent)
	262	com_err (program_name, errno,
	263	_("while setting version on %s"),
	264	name);
	265	return -1;
	266	}
3839e657 TT	267	}
3839e657 TT	268	if (S_ISDIR(st.st_mode) && recursive)
e68594d2 TT	269	return iterate_on_dir (name, chattr_dir_proc, NULL);
e68594d2 TT	270	return 0;
3839e657 TT	271	}
3839e657 TT	272
e1a0a3e3	273	static int chattr_dir_proc (const char * dir_name, struct dirent * de,
54434927	274	void * private EXT2FS_ATTR((unused)))
3839e657	275	{
e68594d2 TT	276	int ret = 0;
e68594d2 TT	277
e1a0a3e3	278	if (strcmp (de->d_name, ".") && strcmp (de->d_name, "..")) {
a418d3ad TT	279	char *path;
	280
	281	path = malloc(strlen (dir_name) + 1 + strlen (de->d_name) + 1);
642935c0 TT	282	if (!path) {
	283	fprintf(stderr, _("Couldn't allocate path variable "
	284	"in chattr_dir_proc"));
e68594d2	285	return -1;
642935c0	286	}
e68594d2	287	sprintf(path, "%s/%s", dir_name, de->d_name);
2d328bb7	288	ret = change_attributes(path);
a418d3ad	289	free(path);
3839e657	290	}
e68594d2	291	return ret;
3839e657 TT	292	}
3839e657 TT	293
00e5433e	294	int main (int argc, char ** argv)
3839e657 TT	295	{
	296	int i, j;
	297	int end_arg = 0;
e68594d2	298	int err, retval = 0;
3839e657	299
d9c56d3c TT	300	#ifdef ENABLE_NLS
d9c56d3c TT	301	setlocale(LC_MESSAGES, "");
14308a53	302	setlocale(LC_CTYPE, "");
d9c56d3c TT	303	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
d9c56d3c TT	304	textdomain(NLS_CAT_NAME);
9d4507c5	305	set_com_err_gettext(gettext);
d9c56d3c	306	#endif
3839e657 TT	307	if (argc && *argv)
	308	program_name = *argv;
	309	i = 1;
e1a0a3e3	310	while (i < argc && !end_arg) {
2293a4d5 TT	311	/* '--' arg should end option processing */
	312	if (strcmp(argv[i], "--") == 0) {
	313	i++;
	314	end_arg = 1;
	315	} else if (decode_arg (&i, argc, argv) == EOF)
3839e657 TT	316	end_arg = 1;
	317	else
	318	i++;
	319	}
	320	if (i >= argc)
	321	usage ();
e1a0a3e3	322	if (set && (add \|\| rem)) {
54434927	323	fputs(_("= is incompatible with - and +\n"), stderr);
3839e657 TT	324	exit (1);
3839e657 TT	325	}
e1a0a3e3	326	if ((rf & af) != 0) {
54434927	327	fputs("Can't both set and unset same flag.\n", stderr);
e1a0a3e3 TT	328	exit (1);
	329	}
	330	if (!(add \|\| rem \|\| set \|\| set_version)) {
54434927	331	fputs(_("Must use '-v', =, - or +\n"), stderr);
3839e657 TT	332	exit (1);
3839e657 TT	333	}
a88fa0c0	334	if (verbose)
0f8973fb TT	335	fprintf (stderr, "chattr %s (%s)\n",
0f8973fb TT	336	E2FSPROGS_VERSION, E2FSPROGS_DATE);
e68594d2	337	for (j = i; j < argc; j++) {
2d328bb7	338	err = change_attributes (argv[j]);
e68594d2 TT	339	if (err)
	340	retval = 1;
	341	}
	342	exit(retval);
3839e657	343	}