[thirdparty/systemd.git] / src / udev-builtin-blkid.c

/*
 * probe disks for filesystems and partitions
 *
 * Copyright (C) 2011 Kay Sievers <kay.sievers@vrfy.org>
 * Copyright (C) 2011 Karel Zak <kzak@redhat.com>
 *
 * 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 of the License, 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, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <sys/stat.h>
#include <blkid/blkid.h>

#include "udev.h"

static void print_property(struct udev_device *dev, bool test, const char *name, const char *value)
{
        char s[265];

        s[0] = '\0';

        if (!strcmp(name, "TYPE")) {
                udev_builtin_add_property(dev, test, "ID_FS_TYPE", value);

        } else if (!strcmp(name, "USAGE")) {
                udev_builtin_add_property(dev, test, "ID_FS_USAGE", value);

        } else if (!strcmp(name, "VERSION")) {
                udev_builtin_add_property(dev, test, "ID_FS_VERSION", value);

        } else if (!strcmp(name, "UUID")) {
                blkid_safe_string(value, s, sizeof(s));
                udev_builtin_add_property(dev, test, "ID_FS_UUID", s);
                blkid_encode_string(value, s, sizeof(s));
                udev_builtin_add_property(dev, test, "ID_FS_UUID_ENC", s);

        } else if (!strcmp(name, "UUID_SUB")) {
                blkid_safe_string(value, s, sizeof(s));
                udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB", s);
                blkid_encode_string(value, s, sizeof(s));
                udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB_ENC", s);

        } else if (!strcmp(name, "LABEL")) {
                blkid_safe_string(value, s, sizeof(s));
                udev_builtin_add_property(dev, test, "ID_FS_LABEL", s);
                blkid_encode_string(value, s, sizeof(s));
                udev_builtin_add_property(dev, test, "ID_FS_LABEL_ENC", s);

        } else if (!strcmp(name, "PTTYPE")) {
                udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value);

        } else if (!strcmp(name, "PART_ENTRY_NAME")) {
                blkid_encode_string(value, s, sizeof(s));
                udev_builtin_add_property(dev, test, "PART_ENTRY_NAME", s);

        } else if (!strcmp(name, "PART_ENTRY_TYPE")) {
                blkid_encode_string(value, s, sizeof(s));
                udev_builtin_add_property(dev, test, "PART_ENTRY_TYPE", s);

        } else if (!strncmp(name, "PART_ENTRY_", 11)) {
                util_strscpyl(s, sizeof(s), "ID_", name, NULL);
                udev_builtin_add_property(dev, test, name, value);
        }
}

static int probe_superblocks(blkid_probe pr)
{
        struct stat st;
        int rc;

        if (fstat(blkid_probe_get_fd(pr), &st))
                return -1;

        blkid_probe_enable_partitions(pr, 1);

        if (!S_ISCHR(st.st_mode) && blkid_probe_get_size(pr) <= 1024 * 1440 &&
            blkid_probe_is_wholedisk(pr)) {
                /*
                 * check if the small disk is partitioned, if yes then
                 * don't probe for filesystems.
                 */
                blkid_probe_enable_superblocks(pr, 0);

                rc = blkid_do_fullprobe(pr);
                if (rc < 0)
                        return rc;        /* -1 = error, 1 = nothing, 0 = succes */

                if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
                        return 0;        /* partition table detected */
        }

        blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
        blkid_probe_enable_superblocks(pr, 1);

        return blkid_do_safeprobe(pr);
}

static int builtin_blkid(struct udev_device *dev, int argc, char *argv[], bool test)
{
        struct udev *udev = udev_device_get_udev(dev);
        int64_t offset = 0;
        bool noraid = false;
        int fd = -1;
        blkid_probe pr;
        const char *data;
        const char *name;
        int nvals;
        int i;
        size_t len;
        int err = 0;

        static const struct option options[] = {
                { "offset", optional_argument, NULL, 'o' },
                { "noraid", no_argument, NULL, 'R' },
                {}
        };

        for (;;) {
                int option;

                option = getopt_long(argc, argv, "oR", options, NULL);
                if (option == -1)
                        break;

                switch (option) {
                case 'o':
                        offset = strtoull(optarg, NULL, 0);
                        break;
                case 'R':
                        noraid = true;
                        break;
                }
        }

        pr = blkid_new_probe();
        if (!pr) {
                err = -ENOMEM;
                return EXIT_FAILURE;
        }

        blkid_probe_set_superblocks_flags(pr,
                BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID |
                BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
                BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION);

        if (noraid)
                blkid_probe_filter_superblocks_usage(pr, BLKID_FLTR_NOTIN, BLKID_USAGE_RAID);

        fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC);
        if (fd < 0) {
                fprintf(stderr, "error: %s: %m\n", udev_device_get_devnode(dev));
                goto out;
        }

        err = blkid_probe_set_device(pr, fd, offset, 0);
        if (err < 0)
                goto out;

        info(udev, "probe %s %sraid offset=%llu\n",
             udev_device_get_devnode(dev),
             noraid ? "no" : "", (unsigned long long) offset);

        err = probe_superblocks(pr);
        if (err < 0)
                goto out;

        nvals = blkid_probe_numof_values(pr);
        for (i = 0; i < nvals; i++) {
                if (blkid_probe_get_value(pr, i, &name, &data, &len))
                        continue;
                len = strnlen((char *) data, len);
                print_property(dev, test, name, (char *) data);
        }

        blkid_free_probe(pr);
out:
        if (fd > 0)
                close(fd);
        if (err < 0)
                return EXIT_FAILURE;
        return EXIT_SUCCESS;
}

const struct udev_builtin udev_builtin_blkid = {
        .name = "blkid",
        .cmd = builtin_blkid,
        .help = "filesystem and partition probing",
        .run_once = true,
};
Commit	Line	Data
81dadce5 KS	1	/*
	2	* probe disks for filesystems and partitions
	3	*
	4	* Copyright (C) 2011 Kay Sievers <kay.sievers@vrfy.org>
	5	* Copyright (C) 2011 Karel Zak <kzak@redhat.com>
	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation, either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include <stdio.h>
	22	#include <stdlib.h>
	23	#include <stdarg.h>
	24	#include <unistd.h>
	25	#include <string.h>
	26	#include <errno.h>
	27	#include <fcntl.h>
c38a141b	28	#include <getopt.h>
81dadce5 KS	29	#include <sys/stat.h>
	30	#include <blkid/blkid.h>
	31
	32	#include "udev.h"
	33
c38a141b	34	static void print_property(struct udev_device dev, bool test, const char name, const char *value)
81dadce5	35	{
912541b0	36	char s[265];
81dadce5	37
912541b0	38	s[0] = '\0';
81dadce5	39
912541b0 KS	40	if (!strcmp(name, "TYPE")) {
912541b0 KS	41	udev_builtin_add_property(dev, test, "ID_FS_TYPE", value);
81dadce5	42
912541b0 KS	43	} else if (!strcmp(name, "USAGE")) {
912541b0 KS	44	udev_builtin_add_property(dev, test, "ID_FS_USAGE", value);
e5d8ce91	45
912541b0 KS	46	} else if (!strcmp(name, "VERSION")) {
912541b0 KS	47	udev_builtin_add_property(dev, test, "ID_FS_VERSION", value);
81dadce5	48
912541b0 KS	49	} else if (!strcmp(name, "UUID")) {
	50	blkid_safe_string(value, s, sizeof(s));
	51	udev_builtin_add_property(dev, test, "ID_FS_UUID", s);
	52	blkid_encode_string(value, s, sizeof(s));
	53	udev_builtin_add_property(dev, test, "ID_FS_UUID_ENC", s);
81dadce5	54
912541b0 KS	55	} else if (!strcmp(name, "UUID_SUB")) {
	56	blkid_safe_string(value, s, sizeof(s));
	57	udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB", s);
	58	blkid_encode_string(value, s, sizeof(s));
	59	udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB_ENC", s);
81dadce5	60
912541b0 KS	61	} else if (!strcmp(name, "LABEL")) {
	62	blkid_safe_string(value, s, sizeof(s));
	63	udev_builtin_add_property(dev, test, "ID_FS_LABEL", s);
	64	blkid_encode_string(value, s, sizeof(s));
	65	udev_builtin_add_property(dev, test, "ID_FS_LABEL_ENC", s);
81dadce5	66
912541b0 KS	67	} else if (!strcmp(name, "PTTYPE")) {
912541b0 KS	68	udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value);
81dadce5	69
912541b0 KS	70	} else if (!strcmp(name, "PART_ENTRY_NAME")) {
	71	blkid_encode_string(value, s, sizeof(s));
	72	udev_builtin_add_property(dev, test, "PART_ENTRY_NAME", s);
81dadce5	73
912541b0 KS	74	} else if (!strcmp(name, "PART_ENTRY_TYPE")) {
	75	blkid_encode_string(value, s, sizeof(s));
	76	udev_builtin_add_property(dev, test, "PART_ENTRY_TYPE", s);
81dadce5	77
912541b0 KS	78	} else if (!strncmp(name, "PART_ENTRY_", 11)) {
	79	util_strscpyl(s, sizeof(s), "ID_", name, NULL);
	80	udev_builtin_add_property(dev, test, name, value);
	81	}
81dadce5 KS	82	}
	83
	84	static int probe_superblocks(blkid_probe pr)
	85	{
912541b0 KS	86	struct stat st;
912541b0 KS	87	int rc;
81dadce5	88
912541b0 KS	89	if (fstat(blkid_probe_get_fd(pr), &st))
912541b0 KS	90	return -1;
81dadce5	91
912541b0	92	blkid_probe_enable_partitions(pr, 1);
81dadce5	93
912541b0 KS	94	if (!S_ISCHR(st.st_mode) && blkid_probe_get_size(pr) <= 1024 * 1440 &&
	95	blkid_probe_is_wholedisk(pr)) {
	96	/*
	97	* check if the small disk is partitioned, if yes then
	98	* don't probe for filesystems.
	99	*/
	100	blkid_probe_enable_superblocks(pr, 0);
81dadce5	101
912541b0 KS	102	rc = blkid_do_fullprobe(pr);
	103	if (rc < 0)
	104	return rc; /* -1 = error, 1 = nothing, 0 = succes */
81dadce5	105
912541b0 KS	106	if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
	107	return 0; /* partition table detected */
	108	}
81dadce5	109
912541b0 KS	110	blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
912541b0 KS	111	blkid_probe_enable_superblocks(pr, 1);
81dadce5	112
912541b0	113	return blkid_do_safeprobe(pr);
81dadce5 KS	114	}
81dadce5 KS	115
e216e514	116	static int builtin_blkid(struct udev_device dev, int argc, char argv[], bool test)
81dadce5	117	{
912541b0 KS	118	struct udev *udev = udev_device_get_udev(dev);
	119	int64_t offset = 0;
	120	bool noraid = false;
	121	int fd = -1;
	122	blkid_probe pr;
	123	const char *data;
	124	const char *name;
	125	int nvals;
	126	int i;
	127	size_t len;
	128	int err = 0;
	129
	130	static const struct option options[] = {
	131	{ "offset", optional_argument, NULL, 'o' },
	132	{ "noraid", no_argument, NULL, 'R' },
	133	{}
	134	};
	135
	136	for (;;) {
	137	int option;
	138
	139	option = getopt_long(argc, argv, "oR", options, NULL);
	140	if (option == -1)
	141	break;
	142
	143	switch (option) {
	144	case 'o':
	145	offset = strtoull(optarg, NULL, 0);
	146	break;
	147	case 'R':
	148	noraid = true;
	149	break;
	150	}
	151	}
	152
	153	pr = blkid_new_probe();
	154	if (!pr) {
	155	err = -ENOMEM;
	156	return EXIT_FAILURE;
	157	}
	158
	159	blkid_probe_set_superblocks_flags(pr,
	160	BLKID_SUBLKS_LABEL \| BLKID_SUBLKS_UUID \|
	161	BLKID_SUBLKS_TYPE \| BLKID_SUBLKS_SECTYPE \|
	162	BLKID_SUBLKS_USAGE \| BLKID_SUBLKS_VERSION);
	163
	164	if (noraid)
	165	blkid_probe_filter_superblocks_usage(pr, BLKID_FLTR_NOTIN, BLKID_USAGE_RAID);
	166
	167	fd = open(udev_device_get_devnode(dev), O_RDONLY\|O_CLOEXEC);
	168	if (fd < 0) {
	169	fprintf(stderr, "error: %s: %m\n", udev_device_get_devnode(dev));
	170	goto out;
	171	}
	172
	173	err = blkid_probe_set_device(pr, fd, offset, 0);
	174	if (err < 0)
	175	goto out;
	176
	177	info(udev, "probe %s %sraid offset=%llu\n",
	178	udev_device_get_devnode(dev),
	179	noraid ? "no" : "", (unsigned long long) offset);
	180
	181	err = probe_superblocks(pr);
182	if (err < 0)
183	goto out;
184
185	nvals = blkid_probe_numof_values(pr);
186	for (i = 0; i < nvals; i++) {
187	if (blkid_probe_get_value(pr, i, &name, &data, &len))
188	continue;
189	len = strnlen((char *) data, len);
190	print_property(dev, test, name, (char *) data);
191	}
192
193	blkid_free_probe(pr);
81dadce5	194	out:
912541b0 KS	195	if (fd > 0)
	196	close(fd);
	197	if (err < 0)
	198	return EXIT_FAILURE;
	199	return EXIT_SUCCESS;
81dadce5 KS	200	}
	201
	202	const struct udev_builtin udev_builtin_blkid = {
912541b0 KS	203	.name = "blkid",
	204	.cmd = builtin_blkid,
	205	.help = "filesystem and partition probing",
	206	.run_once = true,
81dadce5	207	};