summaryrefslogtreecommitdiff
path: root/misc-utils/blkid.c
diff options
context:
space:
mode:
Diffstat (limited to 'misc-utils/blkid.c')
-rw-r--r--misc-utils/blkid.c957
1 files changed, 957 insertions, 0 deletions
diff --git a/misc-utils/blkid.c b/misc-utils/blkid.c
new file mode 100644
index 0000000..fa38d82
--- /dev/null
+++ b/misc-utils/blkid.c
@@ -0,0 +1,957 @@
+/*
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#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 (1 << 1)
+#define OUTPUT_DEVICE_ONLY (1 << 2)
+#define OUTPUT_PRETTY_LIST (1 << 3) /* deprecated */
+#define OUTPUT_UDEV_LIST (1 << 4) /* deprecated */
+#define OUTPUT_EXPORT_LIST (1 << 5)
+
+#define LOWPROBE_TOPOLOGY (1 << 1)
+#define LOWPROBE_SUPERBLOCKS (1 << 2)
+
+#define BLKID_EXIT_NOTFOUND 2 /* token or device not found */
+#define BLKID_EXIT_OTHER 4 /* bad usage or other error */
+#define BLKID_EXIT_AMBIVAL 8 /* ambivalent low-level probing detected */
+
+#include <blkid.h>
+
+#include "ismounted.h"
+
+#define STRTOXX_EXIT_CODE BLKID_EXIT_OTHER /* strtoxx_or_err() */
+#include "strutils.h"
+#define OPTUTILS_EXIT_CODE BLKID_EXIT_OTHER /* exclusive_option() */
+#include "optutils.h"
+
+#include "closestream.h"
+#include "ttyutils.h"
+
+const char *progname = "blkid";
+
+int raw_chars;
+
+static void print_version(FILE *out)
+{
+ fprintf(out, "%s from %s (libblkid %s, %s)\n",
+ progname, PACKAGE_STRING, LIBBLKID_VERSION, LIBBLKID_DATE);
+}
+
+static void usage(int error)
+{
+ FILE *out = error ? stderr : stdout;
+
+ print_version(out);
+ fprintf(out,
+ "Usage:\n"
+ " %1$s -L <label> | -U <uuid>\n\n"
+ " %1$s [-c <file>] [-ghlLv] [-o <format>] [-s <tag>] \n"
+ " [-t <token>] [<dev> ...]\n\n"
+ " %1$s -p [-s <tag>] [-O <offset>] [-S <size>] \n"
+ " [-o <format>] <dev> ...\n\n"
+ " %1$s -i [-s <tag>] [-o <format>] <dev> ...\n\n"
+ "Options:\n"
+ " -c <file> read from <file> instead of reading from the default\n"
+ " cache file (-c /dev/null means no cache)\n"
+ " -d don't encode non-printing characters\n"
+ " -h print this usage message and exit\n"
+ " -g garbage collect the blkid cache\n"
+ " -o <format> output format; can be one of:\n"
+ " value, device, export or full; (default: full)\n"
+ " -k list all known filesystems/RAIDs and exit\n"
+ " -s <tag> show specified tag(s) (default show all tags)\n"
+ " -t <token> find device with a specific token (NAME=value pair)\n"
+ " -l look up only first device with token specified by -t\n"
+ " -L <label> convert LABEL to device name\n"
+ " -U <uuid> convert UUID to device name\n"
+ " -v print version and exit\n"
+ " <dev> specify device(s) to probe (default: all devices)\n\n"
+ "Low-level probing options:\n"
+ " -p low-level superblocks probing (bypass cache)\n"
+ " -i gather information about I/O limits\n"
+ " -S <size> overwrite device size\n"
+ " -O <offset> probe at the given offset\n"
+ " -u <list> filter by \"usage\" (e.g. -u filesystem,raid)\n"
+ " -n <list> filter by filesystem type (e.g. -n vfat,ext3)\n"
+ "\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 (!raw_chars) {
+ 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 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 <= 0)
+ term_width = 80;
+ }
+ 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);
+ 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];
+ int 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 = check_mount_point(devname, &mount_flags, mtpt, sizeof(mtpt));
+ if (retval == 0) {
+ if (mount_flags & MF_MOUNTED) {
+ if (!mtpt[0])
+ strcpy(mtpt, "(mounted, mtpt unknown)");
+ } else if (mount_flags & MF_BUSY)
+ strcpy(mtpt, "(in use)");
+ else
+ strcpy(mtpt, "(not mounted)");
+ }
+
+ pretty_print_line(devname, fs_type, label, mtpt, uuid);
+}
+
+static void print_udev_format(const char *name, const char *value)
+{
+ char enc[265], safe[256];
+ size_t namelen = strlen(name);
+
+ *safe = *enc = '\0';
+
+ if (!strcmp(name, "TYPE") || !strcmp(name, "VERSION")) {
+ blkid_encode_string(value, enc, sizeof(enc));
+ printf("ID_FS_%s=%s\n", name, enc);
+
+ } else if (!strcmp(name, "UUID") ||
+ !strcmp(name, "LABEL") ||
+ !strcmp(name, "UUID_SUB")) {
+
+ blkid_safe_string(value, safe, sizeof(safe));
+ printf("ID_FS_%s=%s\n", name, safe);
+
+ blkid_encode_string(value, enc, sizeof(enc));
+ printf("ID_FS_%s_ENC=%s\n", name, enc);
+
+ } else if (!strcmp(name, "PTTYPE")) {
+ printf("ID_PART_TABLE_TYPE=%s\n", value);
+
+ } else if (!strcmp(name, "PART_ENTRY_NAME") ||
+ !strcmp(name, "PART_ENTRY_TYPE")) {
+
+ blkid_encode_string(value, enc, sizeof(enc));
+ printf("ID_%s=%s\n", name, enc);
+
+ } else if (!strncmp(name, "PART_ENTRY_", 11))
+ printf("ID_%s=%s\n", name, value);
+
+ else if (namelen >= 15 && (
+ !strcmp(name + (namelen - 12), "_SECTOR_SIZE") ||
+ !strcmp(name + (namelen - 8), "_IO_SIZE") ||
+ !strcmp(name, "ALIGNMENT_OFFSET")))
+ printf("ID_IOLIMIT_%s=%s\n", name, value);
+ else
+ printf("ID_FS_%s=%s\n", name, value);
+}
+
+static int has_item(char *ary[], const char *item)
+{
+ char **p;
+
+ for (p = ary; *p != NULL; p++)
+ if (!strcmp(item, *p))
+ return 1;
+ return 0;
+}
+
+static void print_value(int output, int num, const char *devname,
+ const char *value, const char *name, size_t valsz)
+{
+ if (output & OUTPUT_VALUE_ONLY) {
+ fputs(value, stdout);
+ fputc('\n', stdout);
+
+ } else if (output & OUTPUT_UDEV_LIST) {
+ print_udev_format(name, value);
+
+ } else if (output & OUTPUT_EXPORT_LIST) {
+ if (num == 1 && devname)
+ printf("DEVNAME=%s\n", devname);
+ fputs(name, stdout);
+ fputs("=", stdout);
+ safe_print(value, valsz);
+ fputs("\n", stdout);
+
+ } else {
+ if (num == 1 && devname)
+ printf("%s: ", devname);
+ fputs(name, stdout);
+ fputs("=\"", stdout);
+ safe_print(value, valsz);
+ fputs("\" ", stdout);
+ }
+}
+
+static void print_tags(blkid_dev dev, char *show[], int output)
+{
+ blkid_tag_iterate iter;
+ const char *type, *value, *devname;
+ int num = 1;
+ static int first = 1;
+
+ if (!dev)
+ return;
+
+ if (output & OUTPUT_PRETTY_LIST) {
+ pretty_print_dev(dev);
+ return;
+ }
+
+ devname = blkid_dev_devname(dev);
+
+ if (output & OUTPUT_DEVICE_ONLY) {
+ printf("%s\n", devname);
+ return;
+ }
+
+ iter = blkid_tag_iterate_begin(dev);
+ while (blkid_tag_next(iter, &type, &value) == 0) {
+ if (show[0] && !has_item(show, type))
+ continue;
+
+ if (num == 1 && !first &&
+ (output & (OUTPUT_UDEV_LIST | OUTPUT_EXPORT_LIST)))
+ /* add extra line between output from more devices */
+ fputc('\n', stdout);
+
+ print_value(output, num++, devname, value, type, strlen(value));
+ }
+ blkid_tag_iterate_end(iter);
+
+ if (num > 1) {
+ if (!(output & (OUTPUT_VALUE_ONLY | OUTPUT_UDEV_LIST |
+ OUTPUT_EXPORT_LIST)))
+ printf("\n");
+ first = 0;
+ }
+}
+
+
+static int append_str(char **res, size_t *sz, const char *a, const char *b)
+{
+ char *str = *res;
+ size_t asz = a ? strlen(a) : 0;
+ size_t bsz = b ? strlen(b) : 0;
+ size_t len = *sz + asz + bsz;
+
+ if (!len)
+ return -1;
+
+ str = realloc(str, len + 1);
+ if (!str) {
+ free(*res);
+ return -1;
+ }
+
+ *res = str;
+ str += *sz;
+
+ if (a) {
+ memcpy(str, a, asz);
+ str += asz;
+ }
+ if (b) {
+ memcpy(str, b, bsz);
+ str += bsz;
+ }
+ *str = '\0';
+ *sz = len;
+ return 0;
+}
+
+/*
+ * Compose and print ID_FS_AMBIVALENT for udev
+ */
+static int print_udev_ambivalent(blkid_probe pr)
+{
+ char *val = NULL;
+ size_t valsz = 0;
+ int count = 0, rc = -1;
+
+ while (!blkid_do_probe(pr)) {
+ const char *usage_txt = NULL, *type = NULL, *version = NULL;
+ char enc[256];
+
+ blkid_probe_lookup_value(pr, "USAGE", &usage_txt, NULL);
+ blkid_probe_lookup_value(pr, "TYPE", &type, NULL);
+ blkid_probe_lookup_value(pr, "VERSION", &version, NULL);
+
+ if (!usage_txt || !type)
+ continue;
+
+ blkid_encode_string(usage_txt, enc, sizeof(enc));
+ if (append_str(&val, &valsz, enc, ":"))
+ goto done;
+
+ blkid_encode_string(type, enc, sizeof(enc));
+ if (append_str(&val, &valsz, enc, version ? ":" : " "))
+ goto done;
+
+ if (version) {
+ blkid_encode_string(version, enc, sizeof(enc));
+ if (append_str(&val, &valsz, enc, " "))
+ goto done;
+ }
+ count++;
+ }
+
+ if (count > 1) {
+ *(val + valsz - 1) = '\0'; /* rem tailing whitespace */
+ printf("ID_FS_AMBIVALEN=%s\n", val);
+ rc = 0;
+ }
+done:
+ free(val);
+ return rc;
+}
+
+static int lowprobe_superblocks(blkid_probe pr)
+{
+ struct stat st;
+ int rc, fd = blkid_probe_get_fd(pr);
+
+ if (fd < 0 || fstat(fd, &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 lowprobe_topology(blkid_probe pr)
+{
+ /* enable topology probing only */
+ blkid_probe_enable_topology(pr, 1);
+
+ blkid_probe_enable_superblocks(pr, 0);
+ blkid_probe_enable_partitions(pr, 0);
+
+ return blkid_do_fullprobe(pr);
+}
+
+static int lowprobe_device(blkid_probe pr, const char *devname,
+ int chain, char *show[], int output,
+ blkid_loff_t offset, blkid_loff_t size)
+{
+ const char *data;
+ const char *name;
+ int nvals = 0, n, num = 1;
+ size_t len;
+ int fd;
+ int rc = 0;
+ static int first = 1;
+
+ fd = open(devname, O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "error: %s: %m\n", devname);
+ return BLKID_EXIT_NOTFOUND;
+ }
+ if (blkid_probe_set_device(pr, fd, offset, size))
+ goto done;
+
+ if (chain & LOWPROBE_TOPOLOGY)
+ rc = lowprobe_topology(pr);
+ if (rc >= 0 && (chain & LOWPROBE_SUPERBLOCKS))
+ rc = lowprobe_superblocks(pr);
+ if (rc < 0)
+ goto done;
+
+ if (!rc)
+ nvals = blkid_probe_numof_values(pr);
+
+ if (nvals &&
+ !(chain & LOWPROBE_TOPOLOGY) &&
+ !(output & OUTPUT_UDEV_LIST) &&
+ !blkid_probe_has_value(pr, "TYPE") &&
+ !blkid_probe_has_value(pr, "PTTYPE"))
+ /*
+ * Ignore probing result if there is not any filesystem or
+ * partition table on the device and udev output is not
+ * requested.
+ *
+ * The udev db stores information about partitions, so
+ * PART_ENTRY_* values are alway important.
+ */
+ nvals = 0;
+
+ if (nvals && !first && output & (OUTPUT_UDEV_LIST | OUTPUT_EXPORT_LIST))
+ /* add extra line between output from devices */
+ fputc('\n', stdout);
+
+ if (nvals && (output & OUTPUT_DEVICE_ONLY)) {
+ printf("%s\n", devname);
+ goto done;
+ }
+
+ for (n = 0; n < nvals; n++) {
+ if (blkid_probe_get_value(pr, n, &name, &data, &len))
+ continue;
+ if (show[0] && !has_item(show, name))
+ continue;
+ len = strnlen((char *) data, len);
+ print_value(output, num++, devname, (char *) data, name, len);
+ }
+
+ if (first)
+ first = 0;
+ if (nvals >= 1 && !(output & (OUTPUT_VALUE_ONLY |
+ OUTPUT_UDEV_LIST | OUTPUT_EXPORT_LIST)))
+ printf("\n");
+done:
+ if (rc == -2) {
+ if (output & OUTPUT_UDEV_LIST)
+ print_udev_ambivalent(pr);
+ else
+ fprintf(stderr,
+ "%s: ambivalent result (probably more "
+ "filesystems on the device, use wipefs(8) "
+ "to see more details)\n",
+ devname);
+ }
+ close(fd);
+
+ if (rc == -2)
+ return BLKID_EXIT_AMBIVAL; /* ambivalent probing result */
+ if (!nvals)
+ return BLKID_EXIT_NOTFOUND; /* nothing detected */
+
+ return 0; /* success */
+}
+
+/* converts comma separated list to BLKID_USAGE_* mask */
+static int list_to_usage(const char *list, int *flag)
+{
+ int mask = 0;
+ const char *word = NULL, *p = list;
+
+ if (p && strncmp(p, "no", 2) == 0) {
+ *flag = BLKID_FLTR_NOTIN;
+ p += 2;
+ }
+ if (!p || !*p)
+ goto err;
+ while(p) {
+ word = p;
+ p = strchr(p, ',');
+ if (p)
+ p++;
+ if (!strncmp(word, "filesystem", 10))
+ mask |= BLKID_USAGE_FILESYSTEM;
+ else if (!strncmp(word, "raid", 4))
+ mask |= BLKID_USAGE_RAID;
+ else if (!strncmp(word, "crypto", 6))
+ mask |= BLKID_USAGE_CRYPTO;
+ else if (!strncmp(word, "other", 5))
+ mask |= BLKID_USAGE_OTHER;
+ else
+ goto err;
+ }
+ return mask;
+err:
+ *flag = 0;
+ fprintf(stderr, "unknown kerword in -u <list> argument: '%s'\n",
+ word ? word : list);
+ exit(BLKID_EXIT_OTHER);
+}
+
+/* converts comma separated list to types[] */
+static char **list_to_types(const char *list, int *flag)
+{
+ int i;
+ const char *p = list;
+ char **res = NULL;
+
+ if (p && strncmp(p, "no", 2) == 0) {
+ *flag = BLKID_FLTR_NOTIN;
+ p += 2;
+ }
+ if (!p || !*p) {
+ fprintf(stderr, "error: -u <list> argument is empty\n");
+ goto err;
+ }
+ for (i = 1; p && (p = strchr(p, ',')); i++, p++);
+
+ res = calloc(i + 1, sizeof(char *));
+ if (!res)
+ goto err_mem;
+ p = *flag & BLKID_FLTR_NOTIN ? list + 2 : list;
+ i = 0;
+
+ while(p) {
+ const char *word = p;
+ p = strchr(p, ',');
+ res[i] = p ? strndup(word, p - word) : strdup(word);
+ if (!res[i++])
+ goto err_mem;
+ if (p)
+ p++;
+ }
+ res[i] = NULL;
+ return res;
+err_mem:
+ fprintf(stderr, "out of memory\n");
+err:
+ *flag = 0;
+ free(res);
+ exit(BLKID_EXIT_OTHER);
+}
+
+static void free_types_list(char *list[])
+{
+ char **n;
+
+ if (!list)
+ return;
+ for (n = list; *n; n++)
+ free(*n);
+ free(list);
+}
+
+int main(int argc, char **argv)
+{
+ blkid_cache cache = NULL;
+ char **devices = NULL;
+ char *show[128] = { NULL, };
+ char *search_type = NULL, *search_value = NULL;
+ char *read = NULL;
+ int fltr_usage = 0;
+ char **fltr_type = NULL;
+ int fltr_flag = BLKID_FLTR_ONLYIN;
+ unsigned int numdev = 0, numtag = 0;
+ int version = 0;
+ int err = BLKID_EXIT_OTHER;
+ unsigned int i;
+ int output_format = 0;
+ int lookup = 0, gc = 0, lowprobe = 0, eval = 0;
+ int c;
+ uintmax_t offset = 0, size = 0;
+
+ static const ul_excl_t excl[] = { /* rows and cols in in ASCII order */
+ { 'n','u' },
+ { 0 }
+ };
+ int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
+
+ show[0] = NULL;
+ atexit(close_stdout);
+
+ while ((c = getopt (argc, argv,
+ "c:df:ghilL:n:ko:O:ps:S:t:u:U:w:v")) != EOF) {
+
+ err_exclusive_options(c, NULL, excl, excl_st);
+
+ switch (c) {
+ case 'c':
+ if (optarg && !*optarg)
+ read = NULL;
+ else
+ read = optarg;
+ break;
+ case 'd':
+ raw_chars = 1;
+ break;
+ case 'L':
+ eval++;
+ search_value = strdup(optarg);
+ search_type = strdup("LABEL");
+ break;
+ case 'n':
+ fltr_type = list_to_types(optarg, &fltr_flag);
+ break;
+ case 'u':
+ fltr_usage = list_to_usage(optarg, &fltr_flag);
+ break;
+ case 'U':
+ eval++;
+ search_value = strdup(optarg);
+ search_type = strdup("UUID");
+ break;
+ case 'i':
+ lowprobe |= LOWPROBE_TOPOLOGY;
+ break;
+ case 'l':
+ lookup++;
+ break;
+ case 'g':
+ gc = 1;
+ break;
+ case 'k':
+ {
+ size_t idx = 0;
+ const char *name = NULL;
+
+ while (blkid_superblocks_get_name(idx++, &name, NULL) == 0)
+ printf("%s\n", name);
+ exit(EXIT_SUCCESS);
+ }
+ 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; /* deprecated */
+ else if (!strcmp(optarg, "udev"))
+ output_format = OUTPUT_UDEV_LIST;
+ else if (!strcmp(optarg, "export"))
+ output_format = OUTPUT_EXPORT_LIST;
+ else if (!strcmp(optarg, "full"))
+ output_format = 0;
+ else {
+ fprintf(stderr, "Invalid output format %s. "
+ "Choose from value,\n\t"
+ "device, list, udev or full\n", optarg);
+ exit(BLKID_EXIT_OTHER);
+ }
+ break;
+ case 'O':
+ offset = strtosize_or_err(optarg, "invalid offset argument");
+ break;
+ case 'p':
+ lowprobe |= LOWPROBE_SUPERBLOCKS;
+ break;
+ case 's':
+ if (numtag + 1 >= sizeof(show) / sizeof(*show)) {
+ fprintf(stderr, "Too many tags specified\n");
+ usage(err);
+ }
+ show[numtag++] = optarg;
+ show[numtag] = NULL;
+ break;
+ case 'S':
+ size = strtosize_or_err(optarg, "invalid size argument");
+ 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':
+ /* ignore - backward compatibility */
+ break;
+ case 'h':
+ err = 0;
+ /* fallthrough */
+ default:
+ usage(err);
+ }
+ }
+
+
+ /* The rest of the args are device names */
+ if (optind < argc) {
+ devices = calloc(argc - optind, sizeof(char *));
+ if (!devices) {
+ fprintf(stderr, "Failed to allocate device name array\n");
+ goto exit;
+ }
+
+ while (optind < argc)
+ devices[numdev++] = argv[optind++];
+ }
+
+ if (version) {
+ print_version(stdout);
+ goto exit;
+ }
+
+ /* convert LABEL/UUID lookup to evaluate request */
+ if (lookup && output_format == OUTPUT_DEVICE_ONLY && search_type &&
+ (!strcmp(search_type, "LABEL") || !strcmp(search_type, "UUID"))) {
+ eval++;
+ lookup = 0;
+ }
+
+ if (!lowprobe && !eval && blkid_get_cache(&cache, read) < 0)
+ goto exit;
+
+ if (gc) {
+ blkid_gc_cache(cache);
+ err = 0;
+ goto exit;
+ }
+ err = BLKID_EXIT_NOTFOUND;
+
+ if (eval == 0 && (output_format & OUTPUT_PRETTY_LIST)) {
+ if (lowprobe) {
+ fprintf(stderr, "The low-level probing mode does not "
+ "support 'list' output format\n");
+ exit(BLKID_EXIT_OTHER);
+ }
+ pretty_print_dev(NULL);
+ }
+
+ if (lowprobe) {
+ /*
+ * Low-level API
+ */
+ blkid_probe pr;
+
+ if (!numdev) {
+ fprintf(stderr, "The low-level probing mode "
+ "requires a device\n");
+ exit(BLKID_EXIT_OTHER);
+ }
+
+ /* automatically enable 'export' format for I/O Limits */
+ if (!output_format && (lowprobe & LOWPROBE_TOPOLOGY))
+ output_format = OUTPUT_EXPORT_LIST;
+
+ pr = blkid_new_probe();
+ if (!pr)
+ goto exit;
+
+ if (lowprobe & LOWPROBE_SUPERBLOCKS) {
+ 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 (fltr_usage && blkid_probe_filter_superblocks_usage(
+ pr, fltr_flag, fltr_usage))
+ goto exit;
+
+ else if (fltr_type && blkid_probe_filter_superblocks_type(
+ pr, fltr_flag, fltr_type))
+ goto exit;
+ }
+
+ for (i = 0; i < numdev; i++) {
+ err = lowprobe_device(pr, devices[i], lowprobe, show,
+ output_format,
+ (blkid_loff_t) offset,
+ (blkid_loff_t) size);
+ if (err)
+ break;
+ }
+ blkid_free_probe(pr);
+ } else if (eval) {
+ /*
+ * Evaluate API
+ */
+ char *res = blkid_evaluate_tag(search_type, search_value, NULL);
+ if (res) {
+ err = 0;
+ printf("%s\n", res);
+ }
+ } else if (lookup) {
+ /*
+ * Classic (cache based) API
+ */
+ blkid_dev dev;
+
+ if (!search_type) {
+ fprintf(stderr, "The lookup option requires a "
+ "search type specified using -t\n");
+ exit(BLKID_EXIT_OTHER);
+ }
+ /* 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, 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, 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, output_format);
+ err = 0;
+ }
+ }
+
+exit:
+ free(search_type);
+ free(search_value);
+ free_types_list(fltr_type);
+ if (!lowprobe && !eval)
+ blkid_put_cache(cache);
+ free(devices);
+ return err;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-08 09:23:13 +0000