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util-linux/misc-utils/blkid.c

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/*
* 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>
#include <getopt.h>
#define OUTPUT_FULL (1 << 0)
#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 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"
#include "strutils.h"
#define OPTUTILS_EXIT_CODE BLKID_EXIT_OTHER /* exclusive_option() */
#include "optutils.h"
#define CLOSE_EXIT_CODE BLKID_EXIT_OTHER /* close_stdout() */
#include "closestream.h"
#include "nls.h"
#include "ttyutils.h"
#define XALLOC_EXIT_CODE BLKID_EXIT_OTHER /* x.*alloc(), xstrndup() */
#include "xalloc.h"
struct blkid_control {
int output;
uintmax_t offset;
uintmax_t size;
char *show[128];
unsigned int
eval:1,
gc:1,
lookup:1,
lowprobe:1,
lowprobe_superblocks:1,
lowprobe_topology:1,
no_part_details:1,
raw_chars:1;
};
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out, _( " %s --label <label> | --uuid <uuid>\n\n"), program_invocation_short_name);
fprintf(out, _( " %s [--cache-file <file>] [-ghlLv] [--output <format>] [--match-tag <tag>] \n"
" [--match-token <token>] [<dev> ...]\n\n"), program_invocation_short_name);
fprintf(out, _( " %s -p [--match-tag <tag>] [--offset <offset>] [--size <size>] \n"
" [--output <format>] <dev> ...\n\n"), program_invocation_short_name);
fprintf(out, _( " %s -i [--match-tag <tag>] [--output <format>] <dev> ...\n"), program_invocation_short_name);
fputs(USAGE_OPTIONS, out);
fputs(_( " -c, --cache-file <file> read from <file> instead of reading from the default\n"
" cache file (-c /dev/null means no cache)\n"), out);
fputs(_( " -d, --no-encoding don't encode non-printing characters\n"), out);
fputs(_( " -g, --garbage-collect garbage collect the blkid cache\n"), out);
fputs(_( " -o, --output <format> output format; can be one of:\n"
" value, device, export or full; (default: full)\n"), out);
fputs(_( " -k, --list-filesystems list all known filesystems/RAIDs and exit\n"), out);
fputs(_( " -s, --match-tag <tag> show specified tag(s) (default show all tags)\n"), out);
fputs(_( " -t, --match-token <token> find device with a specific token (NAME=value pair)\n"), out);
fputs(_( " -l, --list-one look up only first device with token specified by -t\n"), out);
fputs(_( " -L, --label <label> convert LABEL to device name\n"), out);
fputs(_( " -U, --uuid <uuid> convert UUID to device name\n"), out);
fputs(_( " <dev> specify device(s) to probe (default: all devices)\n"), out);
fputs( "\n", out);
fputs(_( "Low-level probing options:\n"), out);
fputs(_( " -p, --probe low-level superblocks probing (bypass cache)\n"), out);
fputs(_( " -i, --info gather information about I/O limits\n"), out);
fputs(_( " -S, --size <size> overwrite device size\n"), out);
fputs(_( " -O, --offset <offset> probe at the given offset\n"), out);
fputs(_( " -u, --usages <list> filter by \"usage\" (e.g. -u filesystem,raid)\n"), out);
fputs(_( " -n, --match-types <list> filter by filesystem type (e.g. -n vfat,ext3)\n"), out);
fputs(_( " -D, --no-part-details don't print info from partition table\n"), out);
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(28));
printf(USAGE_MAN_TAIL("blkid(8)"));
exit(EXIT_SUCCESS);
}
/*
* This function does "safe" printing. It will convert non-printable
* ASCII characters using '^' and M- notation.
*
* If 'esc' is defined then escape all chars from esc by \.
*/
static void safe_print(const struct blkid_control *ctl, const char *cp, int len,
const char *esc)
{
unsigned char ch;
if (len < 0)
len = strlen(cp);
while (len--) {
ch = *cp++;
if (!ctl->raw_chars) {
if (ch >= 128) {
fputs("M-", stdout);
ch -= 128;
}
if ((ch < 32) || (ch == 0x7f)) {
fputc('^', stdout);
ch ^= 0x40; /* ^@, ^A, ^B; ^? for DEL */
} else if (esc && strchr(esc, ch))
fputc('\\', stdout);
}
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(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(0)-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) {
const char *msg = NULL;
if (mount_flags & MF_MOUNTED) {
if (!mtpt[0])
msg = _("(mounted, mtpt unknown)");
} else if (mount_flags & MF_BUSY)
msg = _("(in use)");
else
msg = _("(not mounted)");
if (msg)
xstrncpy(mtpt, msg, sizeof(mtpt));
}
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") ||
!strncmp(name, "LABEL", 5) ||
!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, "PTUUID")) {
printf("ID_PART_TABLE_UUID=%s\n", value);
} 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(const struct blkid_control *ctl, const char *item)
{
char * const *p;
for (p = ctl->show; *p != NULL; p++)
if (!strcmp(item, *p))
return 1;
return 0;
}
static void print_value(const struct blkid_control *ctl, int num,
const char *devname, const char *value,
const char *name, size_t valsz)
{
if (ctl->output & OUTPUT_VALUE_ONLY) {
fputs(value, stdout);
fputc('\n', stdout);
} else if (ctl->output & OUTPUT_UDEV_LIST) {
print_udev_format(name, value);
} else if (ctl->output & OUTPUT_EXPORT_LIST) {
if (num == 1 && devname)
printf("DEVNAME=%s\n", devname);
fputs(name, stdout);
fputs("=", stdout);
safe_print(ctl, value, valsz, " \\\"'$`<>");
fputs("\n", stdout);
} else {
if (num == 1 && devname)
printf("%s:", devname);
fputs(" ", stdout);
fputs(name, stdout);
fputs("=\"", stdout);
safe_print(ctl, value, valsz, "\"\\");
fputs("\"", stdout);
}
}
static void print_tags(const struct blkid_control *ctl, blkid_dev dev)
{
blkid_tag_iterate iter;
const char *type, *value, *devname;
int num = 1;
static int first = 1;
if (!dev)
return;
if (ctl->output & OUTPUT_PRETTY_LIST) {
pretty_print_dev(dev);
return;
}
devname = blkid_dev_devname(dev);
if (ctl->output & OUTPUT_DEVICE_ONLY) {
printf("%s\n", devname);
return;
}
iter = blkid_tag_iterate_begin(dev);
while (blkid_tag_next(iter, &type, &value) == 0) {
if (ctl->show[0] && !has_item(ctl, type))
continue;
if (num == 1 && !first &&
(ctl->output & (OUTPUT_UDEV_LIST | OUTPUT_EXPORT_LIST)))
/* add extra line between output from more devices */
fputc('\n', stdout);
print_value(ctl, num++, devname, value, type, strlen(value));
}
blkid_tag_iterate_end(iter);
if (num > 1) {
if (!(ctl->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;
*res = str = xrealloc(str, len + 1);
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_AMBIVALENT=%s\n", val);
rc = 0;
}
done:
free(val);
return rc;
}
static int lowprobe_superblocks(blkid_probe pr, struct blkid_control *ctl)
{
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 = success */
if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
return 0; /* partition table detected */
}
if (!ctl->no_part_details)
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,
struct blkid_control *ctl)
{
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|O_CLOEXEC);
if (fd < 0) {
warn(_("error: %s"), devname);
return BLKID_EXIT_NOTFOUND;
}
if (blkid_probe_set_device(pr, fd, ctl->offset, ctl->size))
goto done;
if (ctl->lowprobe_topology)
rc = lowprobe_topology(pr);
if (rc >= 0 && ctl->lowprobe_superblocks)
rc = lowprobe_superblocks(pr, ctl);
if (rc < 0)
goto done;
if (!rc)
nvals = blkid_probe_numof_values(pr);
if (nvals && !first && ctl->output & (OUTPUT_UDEV_LIST | OUTPUT_EXPORT_LIST))
/* add extra line between output from devices */
fputc('\n', stdout);
if (nvals && (ctl->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 (ctl->show[0] && !has_item(ctl, name))
continue;
len = strnlen(data, len);
print_value(ctl, num++, devname, data, name, len);
}
if (first)
first = 0;
if (nvals >= 1 && !(ctl->output & (OUTPUT_VALUE_ONLY |
OUTPUT_UDEV_LIST | OUTPUT_EXPORT_LIST)))
printf("\n");
done:
if (rc == -2) {
if (ctl->output & OUTPUT_UDEV_LIST)
print_udev_ambivalent(pr);
else
warnx(_("%s: ambivalent result (probably more "
"filesystems on the device, use wipefs(8) "
"to see more details)"),
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;
warnx(_("unknown keyword in -u <list> argument: '%s'"),
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) {
warnx(_("error: -u <list> argument is empty"));
goto err;
}
for (i = 1; p && (p = strchr(p, ',')); i++, p++);
res = xcalloc(i + 1, sizeof(char *));
p = *flag & BLKID_FLTR_NOTIN ? list + 2 : list;
i = 0;
while(p) {
const char *word = p;
p = strchr(p, ',');
res[i++] = p ? xstrndup(word, p - word) : xstrdup(word);
if (p)
p++;
}
res[i] = NULL;
return res;
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)
{
struct blkid_control ctl = { .output = OUTPUT_FULL, 0 };
blkid_cache cache = NULL;
char **devices = 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 err = BLKID_EXIT_OTHER;
unsigned int i;
int c;
static const struct option longopts[] = {
{ "cache-file", required_argument, NULL, 'c' },
{ "no-encoding", no_argument, NULL, 'd' },
{ "no-part-details", no_argument, NULL, 'D' },
{ "garbage-collect", no_argument, NULL, 'g' },
{ "output", required_argument, NULL, 'o' },
{ "list-filesystems", no_argument, NULL, 'k' },
{ "match-tag", required_argument, NULL, 's' },
{ "match-token", required_argument, NULL, 't' },
{ "list-one", no_argument, NULL, 'l' },
{ "label", required_argument, NULL, 'L' },
{ "uuid", required_argument, NULL, 'U' },
{ "probe", no_argument, NULL, 'p' },
{ "info", no_argument, NULL, 'i' },
{ "size", required_argument, NULL, 'S' },
{ "offset", required_argument, NULL, 'O' },
{ "usages", required_argument, NULL, 'u' },
{ "match-types", required_argument, NULL, 'n' },
{ "version", no_argument, NULL, 'V' },
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
{ 'n','u' },
{ 0 }
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
strutils_set_exitcode(BLKID_EXIT_OTHER);
while ((c = getopt_long (argc, argv,
"c:DdghilL:n:ko:O:ps:S:t:u:U:w:Vv", longopts, NULL)) != -1) {
err_exclusive_options(c, NULL, excl, excl_st);
switch (c) {
case 'c':
read = optarg;
break;
case 'd':
ctl.raw_chars = 1;
break;
case 'D':
ctl.no_part_details = 1;
break;
case 'L':
ctl.eval = 1;
search_value = xstrdup(optarg);
search_type = xstrdup("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':
ctl.eval = 1;
search_value = xstrdup(optarg);
search_type = xstrdup("UUID");
break;
case 'i':
ctl.lowprobe_topology = 1;
break;
case 'l':
ctl.lookup = 1;
break;
case 'g':
ctl.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"))
ctl.output = OUTPUT_VALUE_ONLY;
else if (!strcmp(optarg, "device"))
ctl.output = OUTPUT_DEVICE_ONLY;
else if (!strcmp(optarg, "list"))
ctl.output = OUTPUT_PRETTY_LIST; /* deprecated */
else if (!strcmp(optarg, "udev"))
ctl.output = OUTPUT_UDEV_LIST;
else if (!strcmp(optarg, "export"))
ctl.output = OUTPUT_EXPORT_LIST;
else if (!strcmp(optarg, "full"))
ctl.output = 0;
else
errx(BLKID_EXIT_OTHER, _("unsupported output format %s"), optarg);
break;
case 'O':
ctl.offset = strtosize_or_err(optarg, _("invalid offset argument"));
break;
case 'p':
ctl.lowprobe_superblocks = 1;
break;
case 's':
if (numtag + 1 >= sizeof(ctl.show) / sizeof(*ctl.show)) {
warnx(_("Too many tags specified"));
errtryhelp(err);
}
ctl.show[numtag++] = optarg;
break;
case 'S':
ctl.size = strtosize_or_err(optarg, _("invalid size argument"));
break;
case 't':
if (search_type) {
warnx(_("Can only search for "
"one NAME=value pair"));
errtryhelp(err);
}
if (blkid_parse_tag_string(optarg,
&search_type,
&search_value)) {
warnx(_("-t needs NAME=value pair"));
errtryhelp(err);
}
break;
case 'V':
case 'v':
fprintf(stdout, _("%s from %s (libblkid %s, %s)\n"),
program_invocation_short_name, PACKAGE_STRING,
LIBBLKID_VERSION, LIBBLKID_DATE);
err = 0;
goto exit;
case 'w':
/* ignore - backward compatibility */
break;
case 'h':
usage();
break;
default:
errtryhelp(EXIT_FAILURE);
}
}
if (ctl.lowprobe_topology || ctl.lowprobe_superblocks)
ctl.lowprobe = 1;
/* The rest of the args are device names */
if (optind < argc) {
devices = xcalloc(argc - optind, sizeof(char *));
while (optind < argc)
devices[numdev++] = argv[optind++];
}
/* convert LABEL/UUID lookup to evaluate request */
if (ctl.lookup && ctl.output == OUTPUT_DEVICE_ONLY && search_type &&
(!strcmp(search_type, "LABEL") || !strcmp(search_type, "UUID"))) {
ctl.eval = 1;
ctl.lookup = 0;
}
if (!ctl.lowprobe && !ctl.eval && blkid_get_cache(&cache, read) < 0)
goto exit;
if (ctl.gc) {
blkid_gc_cache(cache);
err = 0;
goto exit;
}
err = BLKID_EXIT_NOTFOUND;
if (ctl.eval == 0 && (ctl.output & OUTPUT_PRETTY_LIST)) {
if (ctl.lowprobe)
errx(BLKID_EXIT_OTHER,
_("The low-level probing mode does not "
"support 'list' output format"));
pretty_print_dev(NULL);
}
if (ctl.lowprobe) {
/*
* Low-level API
*/
blkid_probe pr;
if (!numdev)
errx(BLKID_EXIT_OTHER,
_("The low-level probing mode "
"requires a device"));
/* automatically enable 'export' format for I/O Limits */
if (!ctl.output && ctl.lowprobe_topology)
ctl.output = OUTPUT_EXPORT_LIST;
pr = blkid_new_probe();
if (!pr)
goto exit;
if (ctl.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], &ctl);
if (err)
break;
}
blkid_free_probe(pr);
} else if (ctl.eval) {
/*
* Evaluate API
*/
char *res = blkid_evaluate_tag(search_type, search_value, NULL);
if (res) {
err = 0;
printf("%s\n", res);
}
} else if (ctl.lookup) {
/*
* Classic (cache based) API
*/
blkid_dev dev;
if (!search_type)
errx(BLKID_EXIT_OTHER,
_("The lookup option requires a "
"search type specified using -t"));
/* 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(&ctl, dev);
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(&ctl, dev);
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(&ctl, dev);
err = 0;
}
}
exit:
free(search_type);
free(search_value);
free_types_list(fltr_type);
if (!ctl.lowprobe && !ctl.eval)
blkid_put_cache(cache);
free(devices);
return err;
}
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