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

/*
 * blkid.c - User command-line interface for libblkid
 *
 * Copyright (C) 2001 Andreas Dilger
 *
 * %Begin-Header%
 * This file may be redistributed under the terms of the
 * GNU Lesser General Public License.
 * %End-Header%
 */

#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifdef HAVE_TERMIO_H
#include <termio.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern int getopt(int argc, char * const argv[], const char *optstring);
extern char *optarg;
extern int optind;
#endif

#define OUTPUT_VALUE_ONLY	0x0001
#define OUTPUT_DEVICE_ONLY	0x0002
#define OUTPUT_PRETTY_LIST	0x0004

#include "ext2fs/ext2fs.h"
#include "blkid/blkid.h"

const char *progname = "blkid";

static void print_version(FILE *out)
{
	fprintf(out, "%s %s (%s)\n", progname, BLKID_VERSION, BLKID_DATE);
}

static void usage(int error)
{
	FILE *out = error ? stderr : stdout;

	print_version(out);
	fprintf(out,
		"usage:\t%s [-c <file>] [-ghlLv] [-o format] "
		"[-s <tag>] [-t <token>]\n    [-w <file>] [dev ...]\n"
		"\t-c\tcache file (default: /etc/blkid.tab, /dev/null = none)\n"
		"\t-h\tprint this usage message and exit\n"
		"\t-g\tgarbage collect the blkid cache\n"
		"\t-s\tshow specified tag(s) (default show all tags)\n"
		"\t-t\tfind device with a specific token (NAME=value pair)\n"
		"\t-l\tlookup the the first device with arguments specified by -t\n"
		"\t-v\tprint version and exit\n"
		"\t-w\twrite cache to different file (/dev/null = no write)\n"
		"\tdev\tspecify device(s) to probe (default: all devices)\n",
		progname);
	exit(error);
}

/*
 * This function does "safe" printing.  It will convert non-printable
 * ASCII characters using '^' and M- notation.
 */
static void safe_print(const char *cp, int len)
{
	unsigned char	ch;

	if (len < 0)
		len = strlen(cp);

	while (len--) {
		ch = *cp++;
		if (ch > 128) {
			fputs("M-", stdout);
			ch -= 128;
		}
		if ((ch < 32) || (ch == 0x7f)) {
			fputc('^', stdout);
			ch ^= 0x40; /* ^@, ^A, ^B; ^? for DEL */
		}
		fputc(ch, stdout);
	}
}

static int get_terminal_width(void)
{
#ifdef TIOCGSIZE
	struct ttysize	t_win;
#endif
#ifdef TIOCGWINSZ
	struct winsize	w_win;
#endif
        const char	*cp;

#ifdef TIOCGSIZE
	if (ioctl (0, TIOCGSIZE, &t_win) == 0)
		return (t_win.ts_cols);
#endif
#ifdef TIOCGWINSZ
	if (ioctl (0, TIOCGWINSZ, &w_win) == 0)
		return (w_win.ws_col);
#endif
        cp = getenv("COLUMNS");
	if (cp)
		return strtol(cp, NULL, 10);
	return 80;
}

static int pretty_print_word(const char *str, int max_len,
			     int left_len, int overflow_nl)
{
	int len = strlen(str) + left_len;
	int ret = 0;

	fputs(str, stdout);
	if (overflow_nl && len > max_len) {
		fputc('\n', stdout);
		len = 0;
	} else if (len > max_len)
		ret = len - max_len;
	do
		fputc(' ', stdout);
	while (len++ < max_len);
	return ret;
}

static void pretty_print_line(const char *device, const char *fs_type,
			      const char *label, const char *mtpt,
			      const char *uuid)
{
	static int device_len = 10, fs_type_len = 7;
	static int label_len = 8, mtpt_len = 14;
	static int term_width = -1;
	int len, w;

	if (term_width < 0)
		term_width = get_terminal_width();

	if (term_width > 80) {
		term_width -= 80;
		w = term_width / 10;
		if (w > 8)
			w = 8;
		term_width -= 2*w;
		label_len += w;
		fs_type_len += w;
		w = term_width/2;
		device_len += w;
		mtpt_len +=w;
	}

	len = pretty_print_word(device, device_len, 0, 1);
	len = pretty_print_word(fs_type, fs_type_len, len, 0);
	len = pretty_print_word(label, label_len, len, 0);
	len = pretty_print_word(mtpt, mtpt_len, len, 0);
	fputs(uuid, stdout);
	fputc('\n', stdout);
}

static void pretty_print_dev(blkid_dev dev)
{
	blkid_tag_iterate	iter;
	const char		*type, *value, *devname;
	const char		*uuid = "", *fs_type = "", *label = "";
	int			len, mount_flags;
	char			mtpt[80];
	errcode_t		retval;

	if (dev == NULL) {
		pretty_print_line("device", "fs_type", "label",
				  "mount point", "UUID");
		for (len=get_terminal_width()-1; len > 0; len--)
			fputc('-', stdout);
		fputc('\n', stdout);
		return;
	}

	devname = blkid_dev_devname(dev);
	if (access(devname, F_OK))
		return;

	/* Get the uuid, label, type */
	iter = blkid_tag_iterate_begin(dev);
	while (blkid_tag_next(iter, &type, &value) == 0) {
		if (!strcmp(type, "UUID"))
			uuid = value;
		if (!strcmp(type, "TYPE"))
			fs_type = value;
		if (!strcmp(type, "LABEL"))
			label = value;
	}
	blkid_tag_iterate_end(iter);

	/* Get the mount point */
	mtpt[0] = 0;
	retval = ext2fs_check_mount_point(devname, &mount_flags,
					  mtpt, sizeof(mtpt));
	if (retval == 0) {
		if (mount_flags & EXT2_MF_MOUNTED) {
			if (!mtpt[0])
				strcpy(mtpt, "(mounted, mtpt unknown)");
		} else if (mount_flags & EXT2_MF_BUSY)
			strcpy(mtpt, "(in use)");
		else
			strcpy(mtpt, "(not mounted)");
	}

	pretty_print_line(devname, fs_type, label, mtpt, uuid);
}

static void print_tags(blkid_dev dev, char *show[], int numtag, int output)
{
	blkid_tag_iterate	iter;
	const char		*type, *value;
	int 			i, first = 1;

	if (!dev)
		return;

	if (output & OUTPUT_PRETTY_LIST) {
		pretty_print_dev(dev);
		return;
	}

	if (output & OUTPUT_DEVICE_ONLY) {
		printf("%s\n", blkid_dev_devname(dev));
		return;
	}

	iter = blkid_tag_iterate_begin(dev);
	while (blkid_tag_next(iter, &type, &value) == 0) {
		if (numtag && show) {
			for (i=0; i < numtag; i++)
				if (!strcmp(type, show[i]))
					break;
			if (i >= numtag)
				continue;
		}
		if (output & OUTPUT_VALUE_ONLY) {
			fputs(value, stdout);
			fputc('\n', stdout);
		} else {
			if (first) {
				printf("%s: ", blkid_dev_devname(dev));
				first = 0;
			}
			fputs(type, stdout);
			fputs("=\"", stdout);
			safe_print(value, -1);
			fputs("\" ", stdout);
		}
	}
	blkid_tag_iterate_end(iter);

	if (!first && !(output & OUTPUT_VALUE_ONLY))
		printf("\n");
}

int main(int argc, char **argv)
{
	blkid_cache cache = NULL;
	char *devices[128] = { NULL, };
	char *show[128] = { NULL, };
	char *search_type = NULL, *search_value = NULL;
	char *read = NULL;
	char *write = NULL;
	unsigned int numdev = 0, numtag = 0;
	int version = 0;
	int err = 4;
	unsigned int i;
	int output_format = 0;
	int lookup = 0, gc = 0;
	int c;

	while ((c = getopt (argc, argv, "c:f:ghlLo:s:t:w:v")) != EOF)
		switch (c) {
		case 'c':
			if (optarg && !*optarg)
				read = NULL;
			else
				read = optarg;
			if (!write)
				write = read;
			break;
		case 'l':
			lookup++;
			break;
		case 'L':
			output_format = OUTPUT_PRETTY_LIST;
			break;
		case 'g':
			gc = 1;
			break;
		case 'o':
			if (!strcmp(optarg, "value"))
				output_format = OUTPUT_VALUE_ONLY;
			else if (!strcmp(optarg, "device"))
				output_format = OUTPUT_DEVICE_ONLY;
			else if (!strcmp(optarg, "list"))
				output_format = OUTPUT_PRETTY_LIST;
			else if (!strcmp(optarg, "full"))
				output_format = 0;
			else {
				fprintf(stderr, "Invalid output format %s. "
					"Choose from value,\n\t"
					"device, list, or full\n", optarg);
				exit(1);
			}
			break;
		case 's':
			if (numtag >= sizeof(show) / sizeof(*show)) {
				fprintf(stderr, "Too many tags specified\n");
				usage(err);
			}
			show[numtag++] = optarg;
			break;
		case 't':
			if (search_type) {
				fprintf(stderr, "Can only search for "
						"one NAME=value pair\n");
				usage(err);
			}
			if (blkid_parse_tag_string(optarg,
						   &search_type,
						   &search_value)) {
				fprintf(stderr, "-t needs NAME=value pair\n");
				usage(err);
			}
			break;
		case 'v':
			version = 1;
			break;
		case 'w':
			if (optarg && !*optarg)
				write = NULL;
			else
				write = optarg;
			break;
		case 'h':
			err = 0;
		default:
			usage(err);
		}

	while (optind < argc)
		devices[numdev++] = argv[optind++];

	if (version) {
		print_version(stdout);
		goto exit;
	}

	if (blkid_get_cache(&cache, read) < 0)
		goto exit;

	err = 2;
	if (gc) {
		blkid_gc_cache(cache);
		goto exit;
	}
	if (output_format & OUTPUT_PRETTY_LIST)
		pretty_print_dev(NULL);

	if (lookup) {
		blkid_dev dev;

		if (!search_type) {
			fprintf(stderr, "The lookup option requires a "
				"search type specified using -t\n");
			exit(1);
		}
		/* Load any additional devices not in the cache */
		for (i = 0; i < numdev; i++)
			blkid_get_dev(cache, devices[i], BLKID_DEV_NORMAL);

		if ((dev = blkid_find_dev_with_tag(cache, search_type,
						   search_value))) {
			print_tags(dev, show, numtag, output_format);
			err = 0;
		}
	/* If we didn't specify a single device, show all available devices */
	} else if (!numdev) {
		blkid_dev_iterate	iter;
		blkid_dev		dev;

		blkid_probe_all(cache);

		iter = blkid_dev_iterate_begin(cache);
		blkid_dev_set_search(iter, search_type, search_value);
		while (blkid_dev_next(iter, &dev) == 0) {
			dev = blkid_verify(cache, dev);
			if (!dev)
				continue;
			print_tags(dev, show, numtag, output_format);
			err = 0;
		}
		blkid_dev_iterate_end(iter);
	/* Add all specified devices to cache (optionally display tags) */
	} else for (i = 0; i < numdev; i++) {
		blkid_dev dev = blkid_get_dev(cache, devices[i],
						  BLKID_DEV_NORMAL);

		if (dev) {
			if (search_type &&
			    !blkid_dev_has_tag(dev, search_type,
					       search_value))
				continue;
			print_tags(dev, show, numtag, output_format);
			err = 0;
		}
	}

exit:
	free(search_type);
	free(search_value);
	blkid_put_cache(cache);
	return err;
}
Commit	Line	Data
e12f2ae7 TT	1	/*
	2	* blkid.c - User command-line interface for libblkid
	3	*
	4	* Copyright (C) 2001 Andreas Dilger
	5	*
	6	* %Begin-Header%
	7	* This file may be redistributed under the terms of the
	8	* GNU Lesser General Public License.
	9	* %End-Header%
	10	*/
	11
d1154eb4	12	#include "config.h"
e12f2ae7	13	#include <stdio.h>
7a603aa8	14	#include <stdlib.h>
3d05802f	15	#include <unistd.h>
48e6e813	16	#include <string.h>
3d05802f TT	17	#ifdef HAVE_TERMIOS_H
	18	#include <termios.h>
	19	#endif
	20	#ifdef HAVE_TERMIO_H
	21	#include <termio.h>
	22	#endif
	23	#ifdef HAVE_SYS_IOCTL_H
	24	#include <sys/ioctl.h>
	25	#endif
e12f2ae7 TT	26	#ifdef HAVE_GETOPT_H
	27	#include <getopt.h>
	28	#else
a6383027	29	extern int getopt(int argc, char * const argv[], const char *optstring);
e12f2ae7 TT	30	extern char *optarg;
	31	extern int optind;
	32	#endif
	33
8927998f TT	34	#define OUTPUT_VALUE_ONLY 0x0001
8927998f TT	35	#define OUTPUT_DEVICE_ONLY 0x0002
3d05802f	36	#define OUTPUT_PRETTY_LIST 0x0004
8927998f	37
3d05802f	38	#include "ext2fs/ext2fs.h"
e12f2ae7 TT	39	#include "blkid/blkid.h"
e12f2ae7 TT	40
7a603aa8 TT	41	const char *progname = "blkid";
	42
	43	static void print_version(FILE *out)
e12f2ae7	44	{
54434927	45	fprintf(out, "%s %s (%s)\n", progname, BLKID_VERSION, BLKID_DATE);
e12f2ae7 TT	46	}
e12f2ae7 TT	47
7a603aa8	48	static void usage(int error)
e12f2ae7 TT	49	{
	50	FILE *out = error ? stderr : stdout;
	51
	52	print_version(out);
	53	fprintf(out,
3d05802f TT	54	"usage:\t%s [-c <file>] [-ghlLv] [-o format] "
3d05802f TT	55	"[-s <tag>] [-t <token>]\n [-w <file>] [dev ...]\n"
e12f2ae7 TT	56	"\t-c\tcache file (default: /etc/blkid.tab, /dev/null = none)\n"
e12f2ae7 TT	57	"\t-h\tprint this usage message and exit\n"
46100e3f	58	"\t-g\tgarbage collect the blkid cache\n"
e12f2ae7 TT	59	"\t-s\tshow specified tag(s) (default show all tags)\n"
e12f2ae7 TT	60	"\t-t\tfind device with a specific token (NAME=value pair)\n"
ed6acfa3	61	"\t-l\tlookup the the first device with arguments specified by -t\n"
e12f2ae7 TT	62	"\t-v\tprint version and exit\n"
	63	"\t-w\twrite cache to different file (/dev/null = no write)\n"
	64	"\tdev\tspecify device(s) to probe (default: all devices)\n",
	65	progname);
	66	exit(error);
	67	}
	68
f8efcda2 TT	69	/*
	70	* This function does "safe" printing. It will convert non-printable
	71	* ASCII characters using '^' and M- notation.
	72	*/
	73	static void safe_print(const char *cp, int len)
	74	{
	75	unsigned char ch;
	76
	77	if (len < 0)
	78	len = strlen(cp);
	79
	80	while (len--) {
	81	ch = *cp++;
	82	if (ch > 128) {
	83	fputs("M-", stdout);
	84	ch -= 128;
	85	}
	86	if ((ch < 32) \|\| (ch == 0x7f)) {
	87	fputc('^', stdout);
	88	ch ^= 0x40; /* ^@, ^A, ^B; ^? for DEL */
	89	}
	90	fputc(ch, stdout);
	91	}
	92	}
	93
3d05802f TT	94	static int get_terminal_width(void)
	95	{
	96	#ifdef TIOCGSIZE
36f4c408	97	struct ttysize t_win;
3d05802f TT	98	#endif
3d05802f TT	99	#ifdef TIOCGWINSZ
36f4c408	100	struct winsize w_win;
3d05802f TT	101	#endif
	102	const char *cp;
	103
	104	#ifdef TIOCGSIZE
36f4c408 TT	105	if (ioctl (0, TIOCGSIZE, &t_win) == 0)
36f4c408 TT	106	return (t_win.ts_cols);
3d05802f TT	107	#endif
3d05802f TT	108	#ifdef TIOCGWINSZ
36f4c408 TT	109	if (ioctl (0, TIOCGWINSZ, &w_win) == 0)
36f4c408 TT	110	return (w_win.ws_col);
3d05802f TT	111	#endif
	112	cp = getenv("COLUMNS");
	113	if (cp)
	114	return strtol(cp, NULL, 10);
	115	return 80;
	116	}
	117
	118	static int pretty_print_word(const char *str, int max_len,
	119	int left_len, int overflow_nl)
	120	{
	121	int len = strlen(str) + left_len;
	122	int ret = 0;
	123
	124	fputs(str, stdout);
	125	if (overflow_nl && len > max_len) {
	126	fputc('\n', stdout);
	127	len = 0;
	128	} else if (len > max_len)
	129	ret = len - max_len;
	130	do
	131	fputc(' ', stdout);
	132	while (len++ < max_len);
	133	return ret;
	134	}
	135
	136	static void pretty_print_line(const char device, const char fs_type,
	137	const char label, const char mtpt,
	138	const char *uuid)
	139	{
	140	static int device_len = 10, fs_type_len = 7;
	141	static int label_len = 8, mtpt_len = 14;
	142	static int term_width = -1;
	143	int len, w;
	144
	145	if (term_width < 0)
	146	term_width = get_terminal_width();
	147
	148	if (term_width > 80) {
	149	term_width -= 80;
	150	w = term_width / 10;
	151	if (w > 8)
	152	w = 8;
	153	term_width -= 2*w;
	154	label_len += w;
	155	fs_type_len += w;
	156	w = term_width/2;
	157	device_len += w;
	158	mtpt_len +=w;
	159	}
	160
	161	len = pretty_print_word(device, device_len, 0, 1);
	162	len = pretty_print_word(fs_type, fs_type_len, len, 0);
	163	len = pretty_print_word(label, label_len, len, 0);
	164	len = pretty_print_word(mtpt, mtpt_len, len, 0);
	165	fputs(uuid, stdout);
	166	fputc('\n', stdout);
	167	}
	168
	169	static void pretty_print_dev(blkid_dev dev)
	170	{
	171	blkid_tag_iterate iter;
	172	const char type, value, *devname;
	173	const char uuid = "", fs_type = "", *label = "";
3d05802f TT	174	int len, mount_flags;
	175	char mtpt[80];
	176	errcode_t retval;
	177
	178	if (dev == NULL) {
	179	pretty_print_line("device", "fs_type", "label",
	180	"mount point", "UUID");
	181	for (len=get_terminal_width()-1; len > 0; len--)
	182	fputc('-', stdout);
	183	fputc('\n', stdout);
	184	return;
	185	}
	186
	187	devname = blkid_dev_devname(dev);
	188	if (access(devname, F_OK))
	189	return;
	190
	191	/* Get the uuid, label, type */
	192	iter = blkid_tag_iterate_begin(dev);
	193	while (blkid_tag_next(iter, &type, &value) == 0) {
	194	if (!strcmp(type, "UUID"))
	195	uuid = value;
	196	if (!strcmp(type, "TYPE"))
	197	fs_type = value;
	198	if (!strcmp(type, "LABEL"))
	199	label = value;
	200	}
	201	blkid_tag_iterate_end(iter);
	202
	203	/* Get the mount point */
	204	mtpt[0] = 0;
	205	retval = ext2fs_check_mount_point(devname, &mount_flags,
	206	mtpt, sizeof(mtpt));
	207	if (retval == 0) {
	208	if (mount_flags & EXT2_MF_MOUNTED) {
	209	if (!mtpt[0])
	210	strcpy(mtpt, "(mounted, mtpt unknown)");
	211	} else if (mount_flags & EXT2_MF_BUSY)
	212	strcpy(mtpt, "(in use)");
	213	else
	214	strcpy(mtpt, "(not mounted)");
	215	}
	216
	217	pretty_print_line(devname, fs_type, label, mtpt, uuid);
	218	}
	219
8927998f	220	static void print_tags(blkid_dev dev, char *show[], int numtag, int output)
e12f2ae7	221	{
7a603aa8 TT	222	blkid_tag_iterate iter;
7a603aa8 TT	223	const char type, value;
ed1b33e8	224	int i, first = 1;
e12f2ae7 TT	225
	226	if (!dev)
	227	return;
	228
3d05802f TT	229	if (output & OUTPUT_PRETTY_LIST) {
	230	pretty_print_dev(dev);
	231	return;
	232	}
	233
8927998f TT	234	if (output & OUTPUT_DEVICE_ONLY) {
	235	printf("%s\n", blkid_dev_devname(dev));
	236	return;
	237	}
	238
7a603aa8 TT	239	iter = blkid_tag_iterate_begin(dev);
	240	while (blkid_tag_next(iter, &type, &value) == 0) {
	241	if (numtag && show) {
	242	for (i=0; i < numtag; i++)
	243	if (!strcmp(type, show[i]))
	244	break;
	245	if (i >= numtag)
	246	continue;
	247	}
f8efcda2 TT	248	if (output & OUTPUT_VALUE_ONLY) {
	249	fputs(value, stdout);
	250	fputc('\n', stdout);
	251	} else {
	252	if (first) {
	253	printf("%s: ", blkid_dev_devname(dev));
	254	first = 0;
	255	}
	256	fputs(type, stdout);
	257	fputs("=\"", stdout);
	258	safe_print(value, -1);
	259	fputs("\" ", stdout);
e12f2ae7 TT	260	}
e12f2ae7 TT	261	}
7a603aa8	262	blkid_tag_iterate_end(iter);
e12f2ae7	263
8927998f	264	if (!first && !(output & OUTPUT_VALUE_ONLY))
e12f2ae7 TT	265	printf("\n");
	266	}
	267
	268	int main(int argc, char **argv)
	269	{
7a603aa8	270	blkid_cache cache = NULL;
e12f2ae7 TT	271	char *devices[128] = { NULL, };
e12f2ae7 TT	272	char *show[128] = { NULL, };
7a603aa8	273	char search_type = NULL, search_value = NULL;
e12f2ae7 TT	274	char *read = NULL;
e12f2ae7 TT	275	char *write = NULL;
54434927	276	unsigned int numdev = 0, numtag = 0;
e12f2ae7 TT	277	int version = 0;
e12f2ae7 TT	278	int err = 4;
54434927	279	unsigned int i;
8927998f	280	int output_format = 0;
46100e3f	281	int lookup = 0, gc = 0;
0af8c33b	282	int c;
e12f2ae7	283
3d05802f	284	while ((c = getopt (argc, argv, "c:f:ghlLo:s:t:w:v")) != EOF)
e12f2ae7	285	switch (c) {
e12f2ae7 TT	286	case 'c':
	287	if (optarg && !*optarg)
	288	read = NULL;
	289	else
	290	read = optarg;
	291	if (!write)
	292	write = read;
	293	break;
ed6acfa3 TT	294	case 'l':
	295	lookup++;
	296	break;
3d05802f TT	297	case 'L':
	298	output_format = OUTPUT_PRETTY_LIST;
	299	break;
46100e3f TT	300	case 'g':
	301	gc = 1;
	302	break;
8927998f TT	303	case 'o':
	304	if (!strcmp(optarg, "value"))
	305	output_format = OUTPUT_VALUE_ONLY;
	306	else if (!strcmp(optarg, "device"))
	307	output_format = OUTPUT_DEVICE_ONLY;
3d05802f TT	308	else if (!strcmp(optarg, "list"))
3d05802f TT	309	output_format = OUTPUT_PRETTY_LIST;
8927998f TT	310	else if (!strcmp(optarg, "full"))
	311	output_format = 0;
	312	else {
3d05802f TT	313	fprintf(stderr, "Invalid output format %s. "
	314	"Choose from value,\n\t"
	315	"device, list, or full\n", optarg);
8927998f TT	316	exit(1);
	317	}
	318	break;
e12f2ae7 TT	319	case 's':
	320	if (numtag >= sizeof(show) / sizeof(*show)) {
	321	fprintf(stderr, "Too many tags specified\n");
	322	usage(err);
	323	}
	324	show[numtag++] = optarg;
	325	break;
	326	case 't':
7a603aa8	327	if (search_type) {
e12f2ae7 TT	328	fprintf(stderr, "Can only search for "
	329	"one NAME=value pair\n");
	330	usage(err);
	331	}
7a603aa8 TT	332	if (blkid_parse_tag_string(optarg,
	333	&search_type,
	334	&search_value)) {
e12f2ae7 TT	335	fprintf(stderr, "-t needs NAME=value pair\n");
	336	usage(err);
	337	}
	338	break;
	339	case 'v':
	340	version = 1;
	341	break;
	342	case 'w':
	343	if (optarg && !*optarg)
	344	write = NULL;
	345	else
	346	write = optarg;
	347	break;
	348	case 'h':
	349	err = 0;
	350	default:
	351	usage(err);
	352	}
	353
	354	while (optind < argc)
	355	devices[numdev++] = argv[optind++];
	356
	357	if (version) {
	358	print_version(stdout);
	359	goto exit;
	360	}
	361
50b380b4	362	if (blkid_get_cache(&cache, read) < 0)
e12f2ae7 TT	363	goto exit;
	364
	365	err = 2;
46100e3f TT	366	if (gc) {
46100e3f TT	367	blkid_gc_cache(cache);
3d05802f TT	368	goto exit;
	369	}
	370	if (output_format & OUTPUT_PRETTY_LIST)
	371	pretty_print_dev(NULL);
	372
	373	if (lookup) {
ed6acfa3 TT	374	blkid_dev dev;
	375
	376	if (!search_type) {
	377	fprintf(stderr, "The lookup option requires a "
	378	"search type specified using -t\n");
	379	exit(1);
	380	}
	381	/* Load any additional devices not in the cache */
	382	for (i = 0; i < numdev; i++)
	383	blkid_get_dev(cache, devices[i], BLKID_DEV_NORMAL);
	384
	385	if ((dev = blkid_find_dev_with_tag(cache, search_type,
	386	search_value))) {
	387	print_tags(dev, show, numtag, output_format);
	388	err = 0;
	389	}
e12f2ae7	390	/* If we didn't specify a single device, show all available devices */
ed6acfa3	391	} else if (!numdev) {
7a603aa8 TT	392	blkid_dev_iterate iter;
7a603aa8 TT	393	blkid_dev dev;
e12f2ae7	394
50b380b4	395	blkid_probe_all(cache);
e12f2ae7	396
7a603aa8	397	iter = blkid_dev_iterate_begin(cache);
c37543df	398	blkid_dev_set_search(iter, search_type, search_value);
7a603aa8	399	while (blkid_dev_next(iter, &dev) == 0) {
18d12963 TT	400	dev = blkid_verify(cache, dev);
	401	if (!dev)
	402	continue;
8927998f	403	print_tags(dev, show, numtag, output_format);
e12f2ae7 TT	404	err = 0;
e12f2ae7 TT	405	}
7a603aa8	406	blkid_dev_iterate_end(iter);
e12f2ae7 TT	407	/* Add all specified devices to cache (optionally display tags) */
e12f2ae7 TT	408	} else for (i = 0; i < numdev; i++) {
98999c39	409	blkid_dev dev = blkid_get_dev(cache, devices[i],
50b380b4	410	BLKID_DEV_NORMAL);
e12f2ae7 TT	411
e12f2ae7 TT	412	if (dev) {
efc6f628 TT	413	if (search_type &&
efc6f628 TT	414	!blkid_dev_has_tag(dev, search_type,
c37543df	415	search_value))
18d12963	416	continue;
8927998f	417	print_tags(dev, show, numtag, output_format);
e12f2ae7 TT	418	err = 0;
	419	}
	420	}
	421
	422	exit:
45e338f5 JM	423	free(search_type);
45e338f5 JM	424	free(search_value);
50b380b4	425	blkid_put_cache(cache);
e12f2ae7 TT	426	return err;
e12f2ae7 TT	427	}