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-rw-r--r--misc/blkid.c433
1 files changed, 433 insertions, 0 deletions
diff --git a/misc/blkid.c b/misc/blkid.c
new file mode 100644
index 0000000..472f017
--- /dev/null
+++ b/misc/blkid.c
@@ -0,0 +1,433 @@
+/*
+ * 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 "config.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#ifdef HAVE_TERMIOS_H
+#include <termios.h>
+#endif
+#ifdef HAVE_TERMIO_H
+#include <termio.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#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 0x0001
+#define OUTPUT_DEVICE_ONLY 0x0002
+#define OUTPUT_PRETTY_LIST 0x0004
+
+#include "ext2fs/ext2fs.h"
+#include "blkid/blkid.h"
+
+static const char *progname = "blkid";
+
+static void print_version(FILE *out)
+{
+ fprintf(out, "%s %s (%s)\n", progname, BLKID_VERSION, BLKID_DATE);
+}
+
+static void usage(int error)
+{
+ FILE *out = error ? stderr : stdout;
+
+ print_version(out);
+ fprintf(out,
+ "usage:\t%s [-c <file>] [-ghlLv] [-o format] "
+ "[-s <tag>] [-t <token>]\n [-w <file>] [dev ...]\n"
+ "\t-c\tcache file (default: /etc/blkid.tab, /dev/null = none)\n"
+ "\t-h\tprint this usage message and exit\n"
+ "\t-g\tgarbage collect the blkid cache\n"
+ "\t-s\tshow specified tag(s) (default show all tags)\n"
+ "\t-t\tfind device with a specific token (NAME=value pair)\n"
+ "\t-l\tlookup the the first device with arguments specified by -t\n"
+ "\t-v\tprint version and exit\n"
+ "\t-w\twrite cache to different file (/dev/null = no write)\n"
+ "\tdev\tspecify device(s) to probe (default: all devices)\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 (ch > 128) {
+ fputs("M-", stdout);
+ ch -= 128;
+ }
+ if ((ch < 32) || (ch == 0x7f)) {
+ fputc('^', stdout);
+ ch ^= 0x40; /* ^@, ^A, ^B; ^? for DEL */
+ }
+ if (ch != '"') {
+ fputc(ch, stdout);
+ }
+ }
+}
+
+static int get_terminal_width(void)
+{
+#ifdef TIOCGSIZE
+ struct ttysize t_win;
+#endif
+#ifdef TIOCGWINSZ
+ struct winsize w_win;
+#endif
+ const char *cp;
+ int width = 80;
+
+#ifdef TIOCGSIZE
+ if (ioctl (0, TIOCGSIZE, &t_win) == 0) {
+ width = t_win.ts_cols;
+ goto got_it;
+ }
+#endif
+#ifdef TIOCGWINSZ
+ if (ioctl (0, TIOCGWINSZ, &w_win) == 0) {
+ width = w_win.ws_col;
+ goto got_it;
+ }
+#endif
+ cp = getenv("COLUMNS");
+ if (cp)
+ width = atoi(cp);
+got_it:
+ if (width > 4096)
+ return 4096; /* sanity check */
+ return width;
+}
+
+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 > 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);
+ len = 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];
+ errcode_t 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 = ext2fs_check_mount_point(devname, &mount_flags,
+ mtpt, sizeof(mtpt));
+ if (retval == 0) {
+ if (mount_flags & EXT2_MF_MOUNTED) {
+ if (!mtpt[0])
+ strcpy(mtpt, "(mounted, mtpt unknown)");
+ } else if (mount_flags & EXT2_MF_BUSY)
+ strcpy(mtpt, "(in use)");
+ else
+ strcpy(mtpt, "(not mounted)");
+ }
+
+ pretty_print_line(devname, fs_type, label, mtpt, uuid);
+}
+
+static void print_tags(blkid_dev dev, char *show[], int numtag, int output)
+{
+ blkid_tag_iterate iter;
+ const char *type, *value;
+ int i, first = 1;
+
+ if (!dev)
+ return;
+
+ if (output & OUTPUT_PRETTY_LIST) {
+ pretty_print_dev(dev);
+ return;
+ }
+
+ if (output & OUTPUT_DEVICE_ONLY) {
+ printf("%s\n", blkid_dev_devname(dev));
+ return;
+ }
+
+ iter = blkid_tag_iterate_begin(dev);
+ while (blkid_tag_next(iter, &type, &value) == 0) {
+ if (numtag && show) {
+ for (i=0; i < numtag; i++)
+ if (!strcmp(type, show[i]))
+ break;
+ if (i >= numtag)
+ continue;
+ }
+ if (output & OUTPUT_VALUE_ONLY) {
+ fputs(value, stdout);
+ fputc('\n', stdout);
+ } else {
+ if (first) {
+ printf("%s: ", blkid_dev_devname(dev));
+ first = 0;
+ }
+ fputs(type, stdout);
+ fputs("=\"", stdout);
+ safe_print(value, -1);
+ fputs("\" ", stdout);
+ }
+ }
+ blkid_tag_iterate_end(iter);
+
+ if (!first && !(output & OUTPUT_VALUE_ONLY))
+ printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+ blkid_cache cache = NULL;
+ char *devices[128] = { NULL, };
+ char *show[128] = { NULL, };
+ char *search_type = NULL, *search_value = NULL;
+ char *read = NULL;
+ char *write = NULL;
+ unsigned int numdev = 0, numtag = 0;
+ int version = 0;
+ int err = 4;
+ unsigned int i;
+ int output_format = 0;
+ int lookup = 0, gc = 0;
+ int c;
+
+ while ((c = getopt (argc, argv, "c:f:ghlLo:s:t:w:v")) != EOF)
+ switch (c) {
+ case 'c':
+ read = optarg;
+ if (!write)
+ write = read;
+ break;
+ case 'l':
+ lookup++;
+ break;
+ case 'L':
+ output_format = OUTPUT_PRETTY_LIST;
+ break;
+ case 'g':
+ gc = 1;
+ break;
+ 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;
+ else if (!strcmp(optarg, "full"))
+ output_format = 0;
+ else {
+ fprintf(stderr, "Invalid output format %s. "
+ "Choose from value,\n\t"
+ "device, list, or full\n", optarg);
+ exit(1);
+ }
+ break;
+ case 's':
+ if (numtag >= sizeof(show) / sizeof(*show)) {
+ fprintf(stderr, "Too many tags specified\n");
+ usage(err);
+ }
+ show[numtag++] = optarg;
+ 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':
+ write = optarg;
+ break;
+ case 'h':
+ err = 0;
+ /* fallthrough */
+ default:
+ usage(err);
+ }
+
+ while (optind < argc)
+ devices[numdev++] = argv[optind++];
+
+ if (version) {
+ print_version(stdout);
+ goto exit;
+ }
+
+ if (blkid_get_cache(&cache, read) < 0)
+ goto exit;
+
+ err = 2;
+ if (gc) {
+ blkid_gc_cache(cache);
+ goto exit;
+ }
+ if (output_format & OUTPUT_PRETTY_LIST)
+ pretty_print_dev(NULL);
+
+ if (lookup) {
+ blkid_dev dev;
+
+ if (!search_type) {
+ fprintf(stderr, "The lookup option requires a "
+ "search type specified using -t\n");
+ exit(1);
+ }
+ /* 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, numtag, 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, numtag, 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, numtag, output_format);
+ err = 0;
+ }
+ }
+
+exit:
+ free(search_type);
+ free(search_value);
+ blkid_put_cache(cache);
+ return err;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 01:37:40 +0000