diff options
Diffstat (limited to 'e2fsprogs/old_e2fsprogs/blkid/probe.c')
| -rw-r--r-- | e2fsprogs/old_e2fsprogs/blkid/probe.c | 721 |
1 files changed, 721 insertions, 0 deletions
diff --git a/e2fsprogs/old_e2fsprogs/blkid/probe.c b/e2fsprogs/old_e2fsprogs/blkid/probe.c new file mode 100644 index 0000000..8c6e2aa --- /dev/null +++ b/e2fsprogs/old_e2fsprogs/blkid/probe.c @@ -0,0 +1,721 @@ +/* vi: set sw=4 ts=4: */ +/* + * probe.c - identify a block device by its contents, and return a dev + * struct with the details + * + * Copyright (C) 1999 by Andries Brouwer + * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o + * Copyright (C) 2001 by Andreas Dilger + * + * %Begin-Header% + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + * %End-Header% + */ + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/types.h> +#ifdef HAVE_SYS_STAT_H +#include <sys/stat.h> +#endif +#ifdef HAVE_SYS_MKDEV_H +#include <sys/mkdev.h> +#endif +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +#include "blkidP.h" +#include "../uuid/uuid.h" +#include "probe.h" + +/* + * This is a special case code to check for an MDRAID device. We do + * this special since it requires checking for a superblock at the end + * of the device. + */ +static int check_mdraid(int fd, unsigned char *ret_uuid) +{ + struct mdp_superblock_s *md; + blkid_loff_t offset; + char buf[4096]; + + if (fd < 0) + return -BLKID_ERR_PARAM; + + offset = (blkid_get_dev_size(fd) & ~((blkid_loff_t)65535)) - 65536; + + if (blkid_llseek(fd, offset, 0) < 0 || + read(fd, buf, 4096) != 4096) + return -BLKID_ERR_IO; + + /* Check for magic number */ + if (memcmp("\251+N\374", buf, 4)) + return -BLKID_ERR_PARAM; + + if (!ret_uuid) + return 0; + *ret_uuid = 0; + + /* The MD UUID is not contiguous in the superblock, make it so */ + md = (struct mdp_superblock_s *)buf; + if (md->set_uuid0 || md->set_uuid1 || md->set_uuid2 || md->set_uuid3) { + memcpy(ret_uuid, &md->set_uuid0, 4); + memcpy(ret_uuid, &md->set_uuid1, 12); + } + return 0; +} + +static void set_uuid(blkid_dev dev, uuid_t uuid) +{ + char str[37]; + + if (!uuid_is_null(uuid)) { + uuid_unparse(uuid, str); + blkid_set_tag(dev, "UUID", str, sizeof(str)); + } +} + +static void get_ext2_info(blkid_dev dev, unsigned char *buf) +{ + struct ext2_super_block *es = (struct ext2_super_block *) buf; + const char *label = 0; + + DBG(DEBUG_PROBE, printf("ext2_sb.compat = %08X:%08X:%08X\n", + blkid_le32(es->s_feature_compat), + blkid_le32(es->s_feature_incompat), + blkid_le32(es->s_feature_ro_compat))); + + if (strlen(es->s_volume_name)) + label = es->s_volume_name; + blkid_set_tag(dev, "LABEL", label, sizeof(es->s_volume_name)); + + set_uuid(dev, es->s_uuid); +} + +static int probe_ext3(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct ext2_super_block *es; + + es = (struct ext2_super_block *)buf; + + /* Distinguish between jbd and ext2/3 fs */ + if (blkid_le32(es->s_feature_incompat) & + EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) + return -BLKID_ERR_PARAM; + + /* Distinguish between ext3 and ext2 */ + if (!(blkid_le32(es->s_feature_compat) & + EXT3_FEATURE_COMPAT_HAS_JOURNAL)) + return -BLKID_ERR_PARAM; + + get_ext2_info(dev, buf); + + blkid_set_tag(dev, "SEC_TYPE", "ext2", sizeof("ext2")); + + return 0; +} + +static int probe_ext2(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct ext2_super_block *es; + + es = (struct ext2_super_block *)buf; + + /* Distinguish between jbd and ext2/3 fs */ + if (blkid_le32(es->s_feature_incompat) & + EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) + return -BLKID_ERR_PARAM; + + get_ext2_info(dev, buf); + + return 0; +} + +static int probe_jbd(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct ext2_super_block *es = (struct ext2_super_block *) buf; + + if (!(blkid_le32(es->s_feature_incompat) & + EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) + return -BLKID_ERR_PARAM; + + get_ext2_info(dev, buf); + + return 0; +} + +static int probe_vfat(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct vfat_super_block *vs; + char serno[10]; + const char *label = 0; + int label_len = 0; + + vs = (struct vfat_super_block *)buf; + + if (strncmp(vs->vs_label, "NO NAME", 7)) { + char *end = vs->vs_label + sizeof(vs->vs_label) - 1; + + while (*end == ' ' && end >= vs->vs_label) + --end; + if (end >= vs->vs_label) { + label = vs->vs_label; + label_len = end - vs->vs_label + 1; + } + } + + /* We can't just print them as %04X, because they are unaligned */ + sprintf(serno, "%02X%02X-%02X%02X", vs->vs_serno[3], vs->vs_serno[2], + vs->vs_serno[1], vs->vs_serno[0]); + blkid_set_tag(dev, "LABEL", label, label_len); + blkid_set_tag(dev, "UUID", serno, sizeof(serno)); + + return 0; +} + +static int probe_msdos(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct msdos_super_block *ms = (struct msdos_super_block *) buf; + char serno[10]; + const char *label = 0; + int label_len = 0; + + if (strncmp(ms->ms_label, "NO NAME", 7)) { + char *end = ms->ms_label + sizeof(ms->ms_label) - 1; + + while (*end == ' ' && end >= ms->ms_label) + --end; + if (end >= ms->ms_label) { + label = ms->ms_label; + label_len = end - ms->ms_label + 1; + } + } + + /* We can't just print them as %04X, because they are unaligned */ + sprintf(serno, "%02X%02X-%02X%02X", ms->ms_serno[3], ms->ms_serno[2], + ms->ms_serno[1], ms->ms_serno[0]); + blkid_set_tag(dev, "UUID", serno, 0); + blkid_set_tag(dev, "LABEL", label, label_len); + blkid_set_tag(dev, "SEC_TYPE", "msdos", sizeof("msdos")); + + return 0; +} + +static int probe_xfs(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct xfs_super_block *xs; + const char *label = 0; + + xs = (struct xfs_super_block *)buf; + + if (strlen(xs->xs_fname)) + label = xs->xs_fname; + blkid_set_tag(dev, "LABEL", label, sizeof(xs->xs_fname)); + set_uuid(dev, xs->xs_uuid); + return 0; +} + +static int probe_reiserfs(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id, unsigned char *buf) +{ + struct reiserfs_super_block *rs = (struct reiserfs_super_block *) buf; + unsigned int blocksize; + const char *label = 0; + + blocksize = blkid_le16(rs->rs_blocksize); + + /* If the superblock is inside the journal, we have the wrong one */ + if (id->bim_kboff/(blocksize>>10) > blkid_le32(rs->rs_journal_block)) + return -BLKID_ERR_BIG; + + /* LABEL/UUID are only valid for later versions of Reiserfs v3.6. */ + if (!strcmp(id->bim_magic, "ReIsEr2Fs") || + !strcmp(id->bim_magic, "ReIsEr3Fs")) { + if (strlen(rs->rs_label)) + label = rs->rs_label; + set_uuid(dev, rs->rs_uuid); + } + blkid_set_tag(dev, "LABEL", label, sizeof(rs->rs_label)); + + return 0; +} + +static int probe_jfs(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct jfs_super_block *js; + const char *label = 0; + + js = (struct jfs_super_block *)buf; + + if (strlen((char *) js->js_label)) + label = (char *) js->js_label; + blkid_set_tag(dev, "LABEL", label, sizeof(js->js_label)); + set_uuid(dev, js->js_uuid); + return 0; +} + +static int probe_romfs(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct romfs_super_block *ros; + const char *label = 0; + + ros = (struct romfs_super_block *)buf; + + if (strlen((char *) ros->ros_volume)) + label = (char *) ros->ros_volume; + blkid_set_tag(dev, "LABEL", label, 0); + return 0; +} + +static int probe_cramfs(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct cramfs_super_block *csb; + const char *label = 0; + + csb = (struct cramfs_super_block *)buf; + + if (strlen((char *) csb->name)) + label = (char *) csb->name; + blkid_set_tag(dev, "LABEL", label, 0); + return 0; +} + +static int probe_swap0(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf __BLKID_ATTR((unused))) +{ + blkid_set_tag(dev, "UUID", 0, 0); + blkid_set_tag(dev, "LABEL", 0, 0); + return 0; +} + +static int probe_swap1(int fd, + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf __BLKID_ATTR((unused))) +{ + struct swap_id_block *sws; + + probe_swap0(fd, cache, dev, id, buf); + /* + * Version 1 swap headers are always located at offset of 1024 + * bytes, although the swap signature itself is located at the + * end of the page (which may vary depending on hardware + * pagesize). + */ + if (lseek(fd, 1024, SEEK_SET) < 0) return 1; + sws = xmalloc(1024); + if (read(fd, sws, 1024) != 1024) { + free(sws); + return 1; + } + + /* arbitrary sanity check.. is there any garbage down there? */ + if (sws->sws_pad[32] == 0 && sws->sws_pad[33] == 0) { + if (sws->sws_volume[0]) + blkid_set_tag(dev, "LABEL", (const char*)sws->sws_volume, + sizeof(sws->sws_volume)); + if (sws->sws_uuid[0]) + set_uuid(dev, sws->sws_uuid); + } + free(sws); + + return 0; +} + +static const char +* const udf_magic[] = { "BEA01", "BOOT2", "CD001", "CDW02", "NSR02", + "NSR03", "TEA01", 0 }; + +static int probe_udf(int fd, blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev __BLKID_ATTR((unused)), + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf __BLKID_ATTR((unused))) +{ + int j, bs; + struct iso_volume_descriptor isosb; + const char * const * m; + + /* determine the block size by scanning in 2K increments + (block sizes larger than 2K will be null padded) */ + for (bs = 1; bs < 16; bs++) { + lseek(fd, bs*2048+32768, SEEK_SET); + if (read(fd, (char *)&isosb, sizeof(isosb)) != sizeof(isosb)) + return 1; + if (isosb.id[0]) + break; + } + + /* Scan up to another 64 blocks looking for additional VSD's */ + for (j = 1; j < 64; j++) { + if (j > 1) { + lseek(fd, j*bs*2048+32768, SEEK_SET); + if (read(fd, (char *)&isosb, sizeof(isosb)) + != sizeof(isosb)) + return 1; + } + /* If we find NSR0x then call it udf: + NSR01 for UDF 1.00 + NSR02 for UDF 1.50 + NSR03 for UDF 2.00 */ + if (!strncmp(isosb.id, "NSR0", 4)) + return 0; + for (m = udf_magic; *m; m++) + if (!strncmp(*m, isosb.id, 5)) + break; + if (*m == 0) + return 1; + } + return 1; +} + +static int probe_ocfs(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct ocfs_volume_header ovh; + struct ocfs_volume_label ovl; + __u32 major; + + memcpy(&ovh, buf, sizeof(ovh)); + memcpy(&ovl, buf+512, sizeof(ovl)); + + major = ocfsmajor(ovh); + if (major == 1) + blkid_set_tag(dev,"SEC_TYPE","ocfs1",sizeof("ocfs1")); + else if (major >= 9) + blkid_set_tag(dev,"SEC_TYPE","ntocfs",sizeof("ntocfs")); + + blkid_set_tag(dev, "LABEL", (const char*)ovl.label, ocfslabellen(ovl)); + blkid_set_tag(dev, "MOUNT", (const char*)ovh.mount, ocfsmountlen(ovh)); + set_uuid(dev, ovl.vol_id); + return 0; +} + +static int probe_ocfs2(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct ocfs2_super_block *osb; + + osb = (struct ocfs2_super_block *)buf; + + blkid_set_tag(dev, "LABEL", (const char*)osb->s_label, sizeof(osb->s_label)); + set_uuid(dev, osb->s_uuid); + return 0; +} + +static int probe_oracleasm(int fd __BLKID_ATTR((unused)), + blkid_cache cache __BLKID_ATTR((unused)), + blkid_dev dev, + const struct blkid_magic *id __BLKID_ATTR((unused)), + unsigned char *buf) +{ + struct oracle_asm_disk_label *dl; + + dl = (struct oracle_asm_disk_label *)buf; + + blkid_set_tag(dev, "LABEL", dl->dl_id, sizeof(dl->dl_id)); + return 0; +} + +/* + * BLKID_BLK_OFFS is at least as large as the highest bim_kboff defined + * in the type_array table below + bim_kbalign. + * + * When probing for a lot of magics, we handle everything in 1kB buffers so + * that we don't have to worry about reading each combination of block sizes. + */ +#define BLKID_BLK_OFFS 64 /* currently reiserfs */ + +/* + * Various filesystem magics that we can check for. Note that kboff and + * sboff are in kilobytes and bytes respectively. All magics are in + * byte strings so we don't worry about endian issues. + */ +static const struct blkid_magic type_array[] = { +/* type kboff sboff len magic probe */ + { "oracleasm", 0, 32, 8, "ORCLDISK", probe_oracleasm }, + { "ntfs", 0, 3, 8, "NTFS ", 0 }, + { "jbd", 1, 0x38, 2, "\123\357", probe_jbd }, + { "ext3", 1, 0x38, 2, "\123\357", probe_ext3 }, + { "ext2", 1, 0x38, 2, "\123\357", probe_ext2 }, + { "reiserfs", 8, 0x34, 8, "ReIsErFs", probe_reiserfs }, + { "reiserfs", 64, 0x34, 9, "ReIsEr2Fs", probe_reiserfs }, + { "reiserfs", 64, 0x34, 9, "ReIsEr3Fs", probe_reiserfs }, + { "reiserfs", 64, 0x34, 8, "ReIsErFs", probe_reiserfs }, + { "reiserfs", 8, 20, 8, "ReIsErFs", probe_reiserfs }, + { "vfat", 0, 0x52, 5, "MSWIN", probe_vfat }, + { "vfat", 0, 0x52, 8, "FAT32 ", probe_vfat }, + { "vfat", 0, 0x36, 5, "MSDOS", probe_msdos }, + { "vfat", 0, 0x36, 8, "FAT16 ", probe_msdos }, + { "vfat", 0, 0x36, 8, "FAT12 ", probe_msdos }, + { "minix", 1, 0x10, 2, "\177\023", 0 }, + { "minix", 1, 0x10, 2, "\217\023", 0 }, + { "minix", 1, 0x10, 2, "\150\044", 0 }, + { "minix", 1, 0x10, 2, "\170\044", 0 }, + { "vxfs", 1, 0, 4, "\365\374\001\245", 0 }, + { "xfs", 0, 0, 4, "XFSB", probe_xfs }, + { "romfs", 0, 0, 8, "-rom1fs-", probe_romfs }, + { "bfs", 0, 0, 4, "\316\372\173\033", 0 }, + { "cramfs", 0, 0, 4, "E=\315\050", probe_cramfs }, + { "qnx4", 0, 4, 6, "QNX4FS", 0 }, + { "udf", 32, 1, 5, "BEA01", probe_udf }, + { "udf", 32, 1, 5, "BOOT2", probe_udf }, + { "udf", 32, 1, 5, "CD001", probe_udf }, + { "udf", 32, 1, 5, "CDW02", probe_udf }, + { "udf", 32, 1, 5, "NSR02", probe_udf }, + { "udf", 32, 1, 5, "NSR03", probe_udf }, + { "udf", 32, 1, 5, "TEA01", probe_udf }, + { "iso9660", 32, 1, 5, "CD001", 0 }, + { "iso9660", 32, 9, 5, "CDROM", 0 }, + { "jfs", 32, 0, 4, "JFS1", probe_jfs }, + { "hfs", 1, 0, 2, "BD", 0 }, + { "ufs", 8, 0x55c, 4, "T\031\001\000", 0 }, + { "hpfs", 8, 0, 4, "I\350\225\371", 0 }, + { "sysv", 0, 0x3f8, 4, "\020~\030\375", 0 }, + { "swap", 0, 0xff6, 10, "SWAP-SPACE", probe_swap0 }, + { "swap", 0, 0xff6, 10, "SWAPSPACE2", probe_swap1 }, + { "swap", 0, 0x1ff6, 10, "SWAP-SPACE", probe_swap0 }, + { "swap", 0, 0x1ff6, 10, "SWAPSPACE2", probe_swap1 }, + { "swap", 0, 0x3ff6, 10, "SWAP-SPACE", probe_swap0 }, + { "swap", 0, 0x3ff6, 10, "SWAPSPACE2", probe_swap1 }, + { "swap", 0, 0x7ff6, 10, "SWAP-SPACE", probe_swap0 }, + { "swap", 0, 0x7ff6, 10, "SWAPSPACE2", probe_swap1 }, + { "swap", 0, 0xfff6, 10, "SWAP-SPACE", probe_swap0 }, + { "swap", 0, 0xfff6, 10, "SWAPSPACE2", probe_swap1 }, + { "ocfs", 0, 8, 9, "OracleCFS", probe_ocfs }, + { "ocfs2", 1, 0, 6, "OCFSV2", probe_ocfs2 }, + { "ocfs2", 2, 0, 6, "OCFSV2", probe_ocfs2 }, + { "ocfs2", 4, 0, 6, "OCFSV2", probe_ocfs2 }, + { "ocfs2", 8, 0, 6, "OCFSV2", probe_ocfs2 }, + { NULL, 0, 0, 0, NULL, NULL } +}; + +/* + * Verify that the data in dev is consistent with what is on the actual + * block device (using the devname field only). Normally this will be + * called when finding items in the cache, but for long running processes + * is also desirable to revalidate an item before use. + * + * If we are unable to revalidate the data, we return the old data and + * do not set the BLKID_BID_FL_VERIFIED flag on it. + */ +blkid_dev blkid_verify(blkid_cache cache, blkid_dev dev) +{ + const struct blkid_magic *id; + unsigned char *bufs[BLKID_BLK_OFFS + 1], *buf; + const char *type; + struct stat st; + time_t diff, now; + int fd, idx; + + if (!dev) + return NULL; + + now = time(0); + diff = now - dev->bid_time; + + if ((now < dev->bid_time) || + (diff < BLKID_PROBE_MIN) || + (dev->bid_flags & BLKID_BID_FL_VERIFIED && + diff < BLKID_PROBE_INTERVAL)) + return dev; + + DBG(DEBUG_PROBE, + printf("need to revalidate %s (time since last check %lu)\n", + dev->bid_name, diff)); + + if (((fd = open(dev->bid_name, O_RDONLY)) < 0) || + (fstat(fd, &st) < 0)) { + if (errno == ENXIO || errno == ENODEV || errno == ENOENT) { + blkid_free_dev(dev); + return NULL; + } + /* We don't have read permission, just return cache data. */ + DBG(DEBUG_PROBE, + printf("returning unverified data for %s\n", + dev->bid_name)); + return dev; + } + + memset(bufs, 0, sizeof(bufs)); + + /* + * Iterate over the type array. If we already know the type, + * then try that first. If it doesn't work, then blow away + * the type information, and try again. + * + */ +try_again: + type = 0; + if (!dev->bid_type || !strcmp(dev->bid_type, "mdraid")) { + uuid_t uuid; + + if (check_mdraid(fd, uuid) == 0) { + set_uuid(dev, uuid); + type = "mdraid"; + goto found_type; + } + } + for (id = type_array; id->bim_type; id++) { + if (dev->bid_type && + strcmp(id->bim_type, dev->bid_type)) + continue; + + idx = id->bim_kboff + (id->bim_sboff >> 10); + if (idx > BLKID_BLK_OFFS || idx < 0) + continue; + buf = bufs[idx]; + if (!buf) { + if (lseek(fd, idx << 10, SEEK_SET) < 0) + continue; + + buf = xmalloc(1024); + + if (read(fd, buf, 1024) != 1024) { + free(buf); + continue; + } + bufs[idx] = buf; + } + + if (memcmp(id->bim_magic, buf + (id->bim_sboff&0x3ff), + id->bim_len)) + continue; + + if ((id->bim_probe == NULL) || + (id->bim_probe(fd, cache, dev, id, buf) == 0)) { + type = id->bim_type; + goto found_type; + } + } + + if (!id->bim_type && dev->bid_type) { + /* + * Zap the device filesystem type and try again + */ + blkid_set_tag(dev, "TYPE", 0, 0); + blkid_set_tag(dev, "SEC_TYPE", 0, 0); + blkid_set_tag(dev, "LABEL", 0, 0); + blkid_set_tag(dev, "UUID", 0, 0); + goto try_again; + } + + if (!dev->bid_type) { + blkid_free_dev(dev); + return NULL; + } + +found_type: + if (dev && type) { + dev->bid_devno = st.st_rdev; + dev->bid_time = time(0); + dev->bid_flags |= BLKID_BID_FL_VERIFIED; + cache->bic_flags |= BLKID_BIC_FL_CHANGED; + + blkid_set_tag(dev, "TYPE", type, 0); + + DBG(DEBUG_PROBE, printf("%s: devno 0x%04llx, type %s\n", + dev->bid_name, st.st_rdev, type)); + } + + close(fd); + + return dev; +} + +int blkid_known_fstype(const char *fstype) +{ + const struct blkid_magic *id; + + for (id = type_array; id->bim_type; id++) { + if (strcmp(fstype, id->bim_type) == 0) + return 1; + } + return 0; +} + +#ifdef TEST_PROGRAM +int main(int argc, char **argv) +{ + blkid_dev dev; + blkid_cache cache; + int ret; + + blkid_debug_mask = DEBUG_ALL; + if (argc != 2) { + fprintf(stderr, "Usage: %s device\n" + "Probe a single device to determine type\n", argv[0]); + exit(1); + } + if ((ret = blkid_get_cache(&cache, bb_dev_null)) != 0) { + fprintf(stderr, "%s: error creating cache (%d)\n", + argv[0], ret); + exit(1); + } + dev = blkid_get_dev(cache, argv[1], BLKID_DEV_NORMAL); + if (!dev) { + printf("%s: %s has an unsupported type\n", argv[0], argv[1]); + return 1; + } + printf("%s is type %s\n", argv[1], dev->bid_type ? + dev->bid_type : "(null)"); + if (dev->bid_label) + printf("\tlabel is '%s'\n", dev->bid_label); + if (dev->bid_uuid) + printf("\tuuid is %s\n", dev->bid_uuid); + + blkid_free_dev(dev); + return 0; +} +#endif |