summaryrefslogtreecommitdiff
path: root/e2fsprogs/blkid/probe.c
diff options
context:
space:
mode:
Diffstat (limited to 'e2fsprogs/blkid/probe.c')
-rw-r--r--e2fsprogs/blkid/probe.c721
1 files changed, 0 insertions, 721 deletions
diff --git a/e2fsprogs/blkid/probe.c b/e2fsprogs/blkid/probe.c
deleted file mode 100644
index 8c6e2aa..0000000
--- a/e2fsprogs/blkid/probe.c
+++ /dev/null
@@ -1,721 +0,0 @@
-/* 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