diff options
Diffstat (limited to 'shlibs/blkid/src/probe.c')
| -rw-r--r-- | shlibs/blkid/src/probe.c | 919 |
1 files changed, 919 insertions, 0 deletions
diff --git a/shlibs/blkid/src/probe.c b/shlibs/blkid/src/probe.c new file mode 100644 index 000000000..0e4745aca --- /dev/null +++ b/shlibs/blkid/src/probe.c @@ -0,0 +1,919 @@ +/* + * probe.c - reads tags (LABEL, UUID, FS type, ..) from a block device + * + * Copyright (C) 2008 Karel Zak <kzak@redhat.com> + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + */ + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <ctype.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 <stdint.h> +#ifdef HAVE_LIBUUID +#include <uuid/uuid.h> +#endif +#include <stdarg.h> + +#include "blkdev.h" +#include "blkidP.h" +#include "probers/probers.h" + +static const struct blkid_idinfo *idinfos[] = +{ + /* RAIDs */ + &linuxraid_idinfo, + &ddfraid_idinfo, + &iswraid_idinfo, + &lsiraid_idinfo, + &viaraid_idinfo, + &silraid_idinfo, + &nvraid_idinfo, + &pdcraid_idinfo, + &highpoint45x_idinfo, + &highpoint37x_idinfo, + &adraid_idinfo, + &jmraid_idinfo, + &lvm2_idinfo, + &lvm1_idinfo, + &luks_idinfo, + + /* Filesystems */ + &vfat_idinfo, + &swsuspend_idinfo, + &swap_idinfo, + &xfs_idinfo, + &ext4dev_idinfo, + &ext4_idinfo, + &ext3_idinfo, + &ext2_idinfo, + &jbd_idinfo, + &reiser_idinfo, + &reiser4_idinfo, + &jfs_idinfo, + &udf_idinfo, + &iso9660_idinfo, + &zfs_idinfo, + &hfsplus_idinfo, + &hfs_idinfo, + &ufs_idinfo, + &hpfs_idinfo, + &sysv_idinfo, + &xenix_idinfo, + &ntfs_idinfo, + &cramfs_idinfo, + &romfs_idinfo, + &minix_idinfo, + &gfs_idinfo, + &gfs2_idinfo, + &ocfs_idinfo, + &ocfs2_idinfo, + &oracleasm_idinfo, + &vxfs_idinfo, + &squashfs_idinfo, + &netware_idinfo, + &btrfs_idinfo +}; + +#ifndef ARRAY_SIZE +# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) +#endif + +/* filter bitmap macros */ +#define blkid_bmp_wordsize (8 * sizeof(unsigned long)) +#define blkid_bmp_idx_bit(item) (1UL << ((item) % blkid_bmp_wordsize)) +#define blkid_bmp_idx_byte(item) ((item) / blkid_bmp_wordsize) + +#define blkid_bmp_set_item(bmp, item) \ + ((bmp)[ blkid_bmp_idx_byte(item) ] |= blkid_bmp_idx_bit(item)) + +#define blkid_bmp_unset_item(bmp, item) \ + ((bmp)[ bmp_idx_byte(item) ] &= ~bmp_idx_bit(item)) + +#define blkid_bmp_get_item(bmp, item) \ + ((bmp)[ blkid_bmp_idx_byte(item) ] & blkid_bmp_idx_bit(item)) + +#define blkid_bmp_size(max_items) \ + (((max_items) + blkid_bmp_wordsize) / blkid_bmp_wordsize) + +#define BLKID_FLTR_ITEMS ARRAY_SIZE(idinfos) +#define BLKID_FLTR_SIZE blkid_bmp_size(BLKID_FLTR_ITEMS) + + +static int blkid_probe_set_usage(blkid_probe pr, int usage); + +int blkid_known_fstype(const char *fstype) +{ + int i; + + if (!fstype) + return 0; + + for (i = 0; i < ARRAY_SIZE(idinfos); i++) { + const struct blkid_idinfo *id = idinfos[i]; + if (strcmp(id->name, fstype) == 0) + return 1; + } + return 0; +} + +/* + * Returns a pointer to the newly allocated probe struct + */ +blkid_probe blkid_new_probe(void) +{ + blkid_init_debug(0); + return calloc(1, sizeof(struct blkid_struct_probe)); +} + +/* + * Deallocates probe struct, buffers and all allocated + * data that are associated with this probing control struct. + */ +void blkid_free_probe(blkid_probe pr) +{ + if (!pr) + return; + free(pr->fltr); + free(pr->buf); + free(pr->sbbuf); + free(pr); +} + +static void blkid_probe_reset_vals(blkid_probe pr) +{ + memset(pr->vals, 0, sizeof(pr->vals)); + pr->nvals = 0; +} + +void blkid_reset_probe(blkid_probe pr) +{ + if (!pr) + return; + DBG(DEBUG_LOWPROBE, printf("reseting blkid_probe\n")); + if (pr->buf) + memset(pr->buf, 0, pr->buf_max); + pr->buf_off = 0; + pr->buf_len = 0; + pr->idx = 0; + if (pr->sbbuf) + memset(pr->sbbuf, 0, BLKID_SB_BUFSIZ); + pr->sbbuf_len = 0; + blkid_probe_reset_vals(pr); +} + + +/* + * Note that we have two offsets: + * + * 1/ general device offset (pr->off), that's useful for example when we + * probe a partition from whole disk image: + * blkid-low --offset <partition_position> disk.img + * + * 2/ buffer offset (the 'off' argument), that useful for offsets in + * superbloks, ... + * + * That means never use lseek(fd, 0, SEEK_SET), the zero position is always + * pr->off, so lseek(fd, pr->off, SEEK_SET). + * + */ +unsigned char *blkid_probe_get_buffer(blkid_probe pr, + blkid_loff_t off, blkid_loff_t len) +{ + ssize_t ret_read = 0; + + if (off < 0 || len < 0) { + DBG(DEBUG_LOWPROBE, + printf("unexpected offset or length of buffer requested\n")); + return NULL; + } + if (off + len <= BLKID_SB_BUFSIZ) { + if (!pr->sbbuf) { + pr->sbbuf = malloc(BLKID_SB_BUFSIZ); + if (!pr->sbbuf) + return NULL; + } + if (!pr->sbbuf_len) { + if (lseek(pr->fd, pr->off, SEEK_SET) < 0) + return NULL; + ret_read = read(pr->fd, pr->sbbuf, BLKID_SB_BUFSIZ); + if (ret_read < 0) + ret_read = 0; + pr->sbbuf_len = ret_read; + } + if (off + len > pr->sbbuf_len) + return NULL; + return pr->sbbuf + off; + } else { + unsigned char *newbuf = NULL; + + if (len > pr->buf_max) { + newbuf = realloc(pr->buf, len); + if (!newbuf) + return NULL; + pr->buf = newbuf; + pr->buf_max = len; + pr->buf_off = 0; + pr->buf_len = 0; + } + if (newbuf || off < pr->buf_off || + off + len > pr->buf_off + pr->buf_len) { + + if (blkid_llseek(pr->fd, pr->off + off, SEEK_SET) < 0) + return NULL; + + ret_read = read(pr->fd, pr->buf, len); + if (ret_read != (ssize_t) len) + return NULL; + pr->buf_off = off; + pr->buf_len = len; + } + return off ? pr->buf + (off - pr->buf_off) : pr->buf; + } +} + +/* + * Assignes the device to probe control struct, resets internal buffers and + * reads 512 bytes from device to the buffers. + * + * Returns -1 in case of failure, or 0 on success. + */ +int blkid_probe_set_device(blkid_probe pr, int fd, + blkid_loff_t off, blkid_loff_t size) +{ + if (!pr) + return -1; + + blkid_reset_probe(pr); + + pr->fd = fd; + pr->off = off; + pr->size = 0; + pr->idx = 0; + + if (size) + pr->size = size; + else { + struct stat sb; + + if (fstat(fd, &sb)) + return -1; + + if (S_ISBLK(sb.st_mode)) + blkdev_get_size(fd, (unsigned long long *) &pr->size); + else + pr->size = sb.st_size; + } + if (!pr->size) + return -1; + + /* read SB to test if the device is readable */ + if (!blkid_probe_get_buffer(pr, 0, 0x200)) { + DBG(DEBUG_LOWPROBE, + printf("failed to prepare a device for low-probing\n")); + return -1; + } + + DBG(DEBUG_LOWPROBE, printf("ready for low-probing, offset=%zd, size=%zd\n", + pr->off, pr->size)); + return 0; +} + +int blkid_probe_set_request(blkid_probe pr, int flags) +{ + if (!pr) + return -1; + pr->probreq = flags; + return 0; +} + +int blkid_probe_reset_filter(blkid_probe pr) +{ + if (!pr) + return -1; + if (pr->fltr) + memset(pr->fltr, 0, BLKID_FLTR_SIZE * sizeof(unsigned long)); + pr->idx = 0; + return 0; +} + +/* + * flag: + * + * BLKID_FLTR_NOTIN - probe all filesystems which are NOT IN names[] + * + * BLKID_FLTR_ONLYIN - probe filesystem which are IN names[] + */ +int blkid_probe_filter_types(blkid_probe pr, int flag, char *names[]) +{ + int i; + + if (!pr || !names) + return -1; + if (!pr->fltr) + pr->fltr = calloc(BLKID_FLTR_SIZE, sizeof(unsigned long)); + else + blkid_probe_reset_filter(pr); + + if (!pr->fltr) + return -1; + + for (i = 0; i < ARRAY_SIZE(idinfos); i++) { + int has = 0; + const struct blkid_idinfo *id = idinfos[i]; + char **n; + + for (n = names; *n; n++) { + if (!strcmp(id->name, *n)) { + has = 1; + break; + } + } + /* The default is enable all filesystems, + * set relevant bitmap bit means disable the filesystem. + */ + if (flag & BLKID_FLTR_ONLYIN) { + if (!has) + blkid_bmp_set_item(pr->fltr, i); + } else if (flag & BLKID_FLTR_NOTIN) { + if (has) + blkid_bmp_set_item(pr->fltr, i); + } + } + DBG(DEBUG_LOWPROBE, printf("a new probing type-filter initialized\n")); + pr->idx = 0; + return 0; +} + +/* + * flag: + * + * BLKID_FLTR_NOTIN - probe all filesystems which are NOT IN "usage" + * + * BLKID_FLTR_ONLYIN - probe filesystem which are IN "usage" + * + * where the "usage" is a set of filesystem according the usage flag (crypto, + * raid, filesystem, ...) + */ +int blkid_probe_filter_usage(blkid_probe pr, int flag, int usage) +{ + int i; + + if (!pr || !usage) + return -1; + if (!pr->fltr) + pr->fltr = calloc(BLKID_FLTR_SIZE, sizeof(unsigned long)); + else + blkid_probe_reset_filter(pr); + + if (!pr->fltr) + return -1; + + for (i = 0; i < ARRAY_SIZE(idinfos); i++) { + const struct blkid_idinfo *id = idinfos[i]; + + if (id->usage & usage) { + if (flag & BLKID_FLTR_NOTIN) + blkid_bmp_set_item(pr->fltr, i); + } else if (flag & BLKID_FLTR_ONLYIN) + blkid_bmp_set_item(pr->fltr, i); + } + DBG(DEBUG_LOWPROBE, printf("a new probing usage-filter initialized\n")); + pr->idx = 0; + return 0; +} + + +int blkid_probe_invert_filter(blkid_probe pr) +{ + int i; + + if (!pr || !pr->fltr) + return -1; + for (i = 0; i < BLKID_FLTR_SIZE; i++) + pr->fltr[i] = ~pr->fltr[i]; + + DBG(DEBUG_LOWPROBE, printf("probing filter inverted\n")); + pr->idx = 0; + return 0; +} + +/* + * The blkid_do_probe() calls the probe functions. This routine could be used + * in a loop when you need to probe for all possible filesystems/raids. + * + * 1/ basic case -- use the first result: + * + * if (blkid_do_probe(pr) == 0) { + * int nvals = blkid_probe_numof_values(pr); + * for (n = 0; n < nvals; n++) { + * if (blkid_probe_get_value(pr, n, &name, &data, &len) == 0) + * printf("%s = %s\n", name, data); + * } + * } + * + * 2/ advanced case -- probe for all signatures (don't forget that some + * filesystems can co-exist on one volume (e.g. CD-ROM). + * + * while (blkid_do_probe(pr) == 0) { + * int nvals = blkid_probe_numof_values(pr); + * ... + * } + * + * The internal probing index (pointer to the last probing function) is + * always reseted when you touch probing filter or set a new device. It + * means you cannot use: + * + * blkid_probe_invert_filter() + * blkid_probe_filter_usage() + * blkid_probe_filter_types() + * blkid_probe_reset_filter() + * blkid_probe_set_device() + * + * in the loop (e.g while()) when you iterate on all signatures. + */ +int blkid_do_probe(blkid_probe pr) +{ + int i = 0; + + if (!pr) + return -1; + + blkid_probe_reset_vals(pr); + + if (pr->idx) + i = pr->idx + 1; + + if (i < 0 && i >= ARRAY_SIZE(idinfos)) + return -1; + + DBG(DEBUG_LOWPROBE, printf("--> starting probing loop\n")); + + for ( ; i < ARRAY_SIZE(idinfos); i++) { + const struct blkid_idinfo *id; + const struct blkid_idmag *mag; + int hasmag = 0; + + pr->idx = i; + + if (pr->fltr && blkid_bmp_get_item(pr->fltr, i)) + continue; + + id = idinfos[i]; + mag = id->magics ? &id->magics[0] : NULL; + + /* try to detect by magic string */ + while(mag && mag->magic) { + int idx; + unsigned char *buf; + + idx = mag->kboff + (mag->sboff >> 10); + buf = blkid_probe_get_buffer(pr, idx << 10, 1024); + + if (buf && !memcmp(mag->magic, + buf + (mag->sboff & 0x3ff), mag->len)) { + DBG(DEBUG_LOWPROBE, printf( + "%s: magic sboff=%u, kboff=%ld\n", + id->name, mag->sboff, mag->kboff)); + hasmag = 1; + break; + } + mag++; + } + + if (hasmag == 0 && id->magics && id->magics[0].magic) + /* magic string(s) defined, but not found */ + continue; + + /* final check by probing function */ + if (id->probefunc) { + DBG(DEBUG_LOWPROBE, printf( + "%s: call probefunc()\n", id->name)); + if (id->probefunc(pr, mag) != 0) + continue; + } + + /* all cheks passed */ + if (pr->probreq & BLKID_PROBREQ_TYPE) + blkid_probe_set_value(pr, "TYPE", + (unsigned char *) id->name, + strlen(id->name) + 1); + if (pr->probreq & BLKID_PROBREQ_USAGE) + blkid_probe_set_usage(pr, id->usage); + + DBG(DEBUG_LOWPROBE, + printf("<-- leaving probing loop (type=%s)\n", id->name)); + return 0; + } + DBG(DEBUG_LOWPROBE, printf("<-- leaving probing loop (failed)\n")); + return 1; +} + +/* + * This is the same function as blkid_do_probe(), but returns only one result + * (cannot be used in while()) and checks for ambivalen results (more + * filesystems on the device) -- in such case returns -2. + */ +int blkid_do_safeprobe(blkid_probe pr) +{ + struct blkid_struct_probe first; + int count = 0; + int intol = 0; + int rc; + + while ((rc = blkid_do_probe(pr)) == 0) { + if (!count) { + /* store the fist result */ + memcpy(first.vals, pr->vals, sizeof(first.vals)); + first.nvals = pr->nvals; + first.idx = pr->idx; + } + if (!(idinfos[pr->idx]->flags & BLKID_IDINFO_TOLERANT)) + intol++; + count++; + } + if (rc < 0) + return rc; /* error */ + if (count > 1 && intol) { + DBG(DEBUG_LOWPROBE, + printf("ERROR: ambivalent result detected (%d filesystems)!\n", + count)); + return -2; /* error, ambivalent result (more FS) */ + } + if (!count) + return 1; /* nothing detected */ + + /* restore the first result */ + memcpy(pr->vals, first.vals, sizeof(first.vals)); + pr->nvals = first.nvals; + pr->idx = first.idx; + + return 0; +} + +int blkid_probe_numof_values(blkid_probe pr) +{ + if (!pr) + return -1; + return pr->nvals; +} + + +static struct blkid_prval *blkid_probe_assign_value( + blkid_probe pr, const char *name) +{ + struct blkid_prval *v; + + if (!name) + return NULL; + if (pr->nvals >= BLKID_PROBVAL_NVALS) + return NULL; + + v = &pr->vals[pr->nvals]; + v->name = name; + pr->nvals++; + + DBG(DEBUG_LOWPROBE, printf("assigning %s\n", name)); + return v; +} + +int blkid_probe_set_value(blkid_probe pr, const char *name, + unsigned char *data, size_t len) +{ + struct blkid_prval *v; + + if (len > BLKID_PROBVAL_BUFSIZ) + len = BLKID_PROBVAL_BUFSIZ; + + v = blkid_probe_assign_value(pr, name); + if (!v) + return -1; + + memcpy(v->data, data, len); + v->len = len; + return 0; +} + +int blkid_probe_vsprintf_value(blkid_probe pr, const char *name, + const char *fmt, va_list ap) +{ + struct blkid_prval *v; + size_t len; + + v = blkid_probe_assign_value(pr, name); + if (!v) + return -1; + + len = vsnprintf((char *) v->data, sizeof(v->data), fmt, ap); + + if (len <= 0) { + pr->nvals--; /* reset the latest assigned value */ + return -1; + } + v->len = len + 1; + return 0; +} + +int blkid_probe_set_version(blkid_probe pr, const char *version) +{ + if (pr->probreq & BLKID_PROBREQ_VERSION) + return blkid_probe_set_value(pr, "VERSION", + (unsigned char *) version, strlen(version) + 1); + return 0; +} + +int blkid_probe_sprintf_version(blkid_probe pr, const char *fmt, ...) +{ + int rc = 0; + + if (pr->probreq & BLKID_PROBREQ_VERSION) { + va_list ap; + + va_start(ap, fmt); + rc = blkid_probe_vsprintf_value(pr, "VERSION", fmt, ap); + va_end(ap); + } + return rc; +} + +static int blkid_probe_set_usage(blkid_probe pr, int usage) +{ + char *u = NULL; + + if (usage & BLKID_USAGE_FILESYSTEM) + u = "filesystem"; + else if (usage & BLKID_USAGE_RAID) + u = "raid"; + else if (usage & BLKID_USAGE_CRYPTO) + u = "crypto"; + else if (usage & BLKID_USAGE_OTHER) + u = "other"; + else + u = "unknown"; + + return blkid_probe_set_value(pr, "USAGE", (unsigned char *) u, strlen(u) + 1); +} + +int blkid_probe_set_label(blkid_probe pr, unsigned char *label, size_t len) +{ + struct blkid_prval *v; + int i; + + if (len > BLKID_PROBVAL_BUFSIZ) + len = BLKID_PROBVAL_BUFSIZ; + + if ((pr->probreq & BLKID_PROBREQ_LABELRAW) && + blkid_probe_set_value(pr, "LABEL_RAW", label, len) < 0) + return -1; + if (!(pr->probreq & BLKID_PROBREQ_LABEL)) + return 0; + v = blkid_probe_assign_value(pr, "LABEL"); + if (!v) + return -1; + + memcpy(v->data, label, len); + v->data[len] = '\0'; + + /* remove trailing whitespace */ + i = strnlen((char *) v->data, len); + while (i--) { + if (!isspace(v->data[i])) + break; + } + v->data[++i] = '\0'; + v->len = i + 1; + return 0; +} + +static size_t encode_to_utf8(int enc, unsigned char *dest, size_t len, + unsigned char *src, size_t count) +{ + size_t i, j; + uint16_t c; + + for (j = i = 0; i + 2 <= count; i += 2) { + if (enc == BLKID_ENC_UTF16LE) + c = (src[i+1] << 8) | src[i]; + else /* BLKID_ENC_UTF16BE */ + c = (src[i] << 8) | src[i+1]; + if (c == 0) { + dest[j] = '\0'; + break; + } else if (c < 0x80) { + if (j+1 >= len) + break; + dest[j++] = (uint8_t) c; + } else if (c < 0x800) { + if (j+2 >= len) + break; + dest[j++] = (uint8_t) (0xc0 | (c >> 6)); + dest[j++] = (uint8_t) (0x80 | (c & 0x3f)); + } else { + if (j+3 >= len) + break; + dest[j++] = (uint8_t) (0xe0 | (c >> 12)); + dest[j++] = (uint8_t) (0x80 | ((c >> 6) & 0x3f)); + dest[j++] = (uint8_t) (0x80 | (c & 0x3f)); + } + } + dest[j] = '\0'; + return j; +} + +int blkid_probe_set_utf8label(blkid_probe pr, unsigned char *label, + size_t len, int enc) +{ + struct blkid_prval *v; + + if ((pr->probreq & BLKID_PROBREQ_LABELRAW) && + blkid_probe_set_value(pr, "LABEL_RAW", label, len) < 0) + return -1; + if (!(pr->probreq & BLKID_PROBREQ_LABEL)) + return 0; + v = blkid_probe_assign_value(pr, "LABEL"); + if (!v) + return -1; + + v->len = encode_to_utf8(enc, v->data, sizeof(v->data), label, len); + return 0; +} + +/* like uuid_is_null() from libuuid, but works with arbitrary size of UUID */ +static int uuid_is_empty(const unsigned char *buf, size_t len) +{ + int i; + + for (i = 0; i < len; i++) + if (buf[i]) + return 0; + return 1; +} + +int blkid_probe_sprintf_uuid(blkid_probe pr, unsigned char *uuid, + size_t len, const char *fmt, ...) +{ + int rc = -1; + va_list ap; + + if (len > BLKID_PROBVAL_BUFSIZ) + len = BLKID_PROBVAL_BUFSIZ; + + if (uuid_is_empty(uuid, len)) + return 0; + + if ((pr->probreq & BLKID_PROBREQ_UUIDRAW) && + blkid_probe_set_value(pr, "UUID_RAW", uuid, len) < 0) + return -1; + if (!(pr->probreq & BLKID_PROBREQ_UUID)) + return 0; + + va_start(ap, fmt); + rc = blkid_probe_vsprintf_value(pr, "UUID", fmt, ap); + va_end(ap); + + /* convert to lower case (..be paranoid) */ + if (!rc) { + int i; + struct blkid_prval *v = &pr->vals[pr->nvals]; + + for (i = 0; i < v->len; i++) + if (v->data[i] >= 'A' && v->data[i] <= 'F') + v->data[i] = (v->data[i] - 'A') + 'a'; + } + return rc; +} + +/* function to set UUIDs that are in suberblocks stored as strings */ +int blkid_probe_strncpy_uuid(blkid_probe pr, unsigned char *str, size_t len) +{ + struct blkid_prval *v; + + if (str == NULL || *str == '\0') + return -1; + if (!len) + len = strlen((char *) str); + if (len > BLKID_PROBVAL_BUFSIZ) + len = BLKID_PROBVAL_BUFSIZ; + + if ((pr->probreq & BLKID_PROBREQ_UUIDRAW) && + blkid_probe_set_value(pr, "UUID_RAW", str, len) < 0) + return -1; + if (!(pr->probreq & BLKID_PROBREQ_UUID)) + return 0; + + v = blkid_probe_assign_value(pr, "UUID"); + if (v) { + memcpy((char *) v->data, str, len); + *(v->data + len) = '\0'; + v->len = len; + return 0; + } + return -1; +} + +/* default _set_uuid function to set DCE UUIDs */ +int blkid_probe_set_uuid_as(blkid_probe pr, unsigned char *uuid, const char *name) +{ + struct blkid_prval *v; + + if (uuid_is_empty(uuid, 16)) + return 0; + + if (!name) { + if ((pr->probreq & BLKID_PROBREQ_UUIDRAW) && + blkid_probe_set_value(pr, "UUID_RAW", uuid, 16) < 0) + return -1; + if (!(pr->probreq & BLKID_PROBREQ_UUID)) + return 0; + + v = blkid_probe_assign_value(pr, "UUID"); + } else + v = blkid_probe_assign_value(pr, name); + +#ifdef HAVE_LIBUUID + { + uuid_unparse(uuid, (char *) v->data); + v->len = 37; + } +#else + v->len = snprintf(v->data, sizeof(v->data), + "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", + uuid[0], uuid[1], uuid[2], uuid[3], + uuid[4], uuid[5], + uuid[6], uuid[7], + uuid[8], uuid[9], + uuid[10], uuid[11], uuid[12], uuid[13], uuid[14],uuid[15]); + v->len++; +#endif + return 0; +} + +int blkid_probe_set_uuid(blkid_probe pr, unsigned char *uuid) +{ + return blkid_probe_set_uuid_as(pr, uuid, NULL); +} + +int blkid_probe_get_value(blkid_probe pr, int num, const char **name, + const char **data, size_t *len) +{ + struct blkid_prval *v; + + if (pr == NULL || num < 0 || num >= pr->nvals) + return -1; + + v = &pr->vals[num]; + if (name) + *name = v->name; + if (data) + *data = (char *) v->data; + if (len) + *len = v->len; + + DBG(DEBUG_LOWPROBE, printf("returning %s value\n", v->name)); + return 0; +} + +int blkid_probe_lookup_value(blkid_probe pr, const char *name, + const char **data, size_t *len) +{ + int i; + + if (pr == NULL || pr->nvals == 0 || name == NULL) + return -1; + + for (i = 0; i < pr->nvals; i++) { + struct blkid_prval *v = &pr->vals[i]; + + if (v->name && strcmp(name, v->name) == 0) { + if (data) + *data = (char *) v->data; + if (len) + *len = v->len; + DBG(DEBUG_LOWPROBE, printf("returning %s value\n", v->name)); + return 0; + } + } + return -1; +} + +int blkid_probe_has_value(blkid_probe pr, const char *name) +{ + if (blkid_probe_lookup_value(pr, name, NULL, NULL) == 0) + return 1; + return 0; +} + |