diff options
Diffstat (limited to 'misc/blkid.c')
| -rw-r--r-- | misc/blkid.c | 433 |
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; +} |