X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=extras%2Fvolume_id%2Fvol_id.c;h=2b487d0b3c51f635862a094ac8c56d46020dd5e0;hp=73843ef6995d2cd2b9c92c1bba438c3bbcea7b3a;hb=d4f687c013a18010fdc2ddf937fad064343e635a;hpb=ede9b541712f0f7366f5481d55f5d56d0e47fcc8 diff --git a/extras/volume_id/vol_id.c b/extras/volume_id/vol_id.c index 73843ef69..2b487d0b3 100644 --- a/extras/volume_id/vol_id.c +++ b/extras/volume_id/vol_id.c @@ -1,21 +1,20 @@ /* * vol_id - read filesystem label and uuid * - * Copyright (C) 2005-2006 Kay Sievers + * Copyright (C) 2005-2008 Kay Sievers * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation version 2 of the License. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . */ #ifndef _GNU_SOURCE @@ -30,50 +29,39 @@ #include #include #include +#include +#include #include -#include "../../udev.h" +#include "../../udev/udev.h" #include "lib/libvolume_id.h" #define BLKGETSIZE64 _IOR(0x12,114,size_t) -#ifdef USE_LOG -void log_message(int priority, const char *format, ...) -{ - va_list args; - static int udev_log = -1; - - if (udev_log == -1) { - const char *value; +static int debug; +struct udev *udev_ctx; - value = getenv("UDEV_LOG"); - if (value) - udev_log = log_priority(value); - else - udev_log = LOG_ERR; +static void log_fn(struct udev *udev, int priority, + const char *file, int line, const char *fn, + const char *format, va_list args) +{ + if (debug) { + fprintf(stderr, "%s: ", fn != NULL ? fn : file); + vfprintf(stderr, format, args); + } else { + vsyslog(priority, format, args); } - - if (priority > udev_log) - return; - - va_start(args, format); - vsyslog(priority, format, args); - va_end(args); } -#endif static void vid_log(int priority, const char *file, int line, const char *format, ...) { -#ifdef USE_LOG - char log_str[1024]; va_list args; + if (priority > udev_get_log_priority(udev_ctx)) + return; va_start(args, format); - vsnprintf(log_str, sizeof(log_str), format, args); - log_str[sizeof(log_str)-1] = '\0'; - log_message(priority, "%s:%i %s", file, line, log_str); + log_fn(udev_ctx, priority, file, line, NULL, format, args); va_end(args); -#endif return; } @@ -109,220 +97,240 @@ static void set_str(char *to, const char *from, size_t count) to[j] = '\0'; } +static int all_probers(volume_id_probe_fn_t probe_fn, + struct volume_id *id, uint64_t off, uint64_t size, + void *data) +{ + const char *type; + + if (probe_fn(id, off, size) == 0) + if (volume_id_get_type(id, &type)) + printf("%s\n", type); + + return 0; +} + int main(int argc, char *argv[]) { - const char help[] = "Usage: vol_id [options] \n" - " --export export key/value pairs\n" - " -t filesystem type\n" - " -l filesystem label\n" - " -u filesystem uuid\n" - " -L raw label\n" - " --skip-raid don't probe for raid\n" - " --probe-all find possibly conflicting signatures\n" - " --help\n" - "\n"; + static const struct option options[] = { + { "label", no_argument, NULL, 'l' }, + { "label-raw", no_argument, NULL, 'L' }, + { "uuid", no_argument, NULL, 'u' }, + { "type", no_argument, NULL, 't' }, + { "export", no_argument, NULL, 'x' }, + { "skip-raid", no_argument, NULL, 's' }, + { "size", required_argument, NULL, 'S' }, + { "probe-all", no_argument, NULL, 'a' }, + { "offset", optional_argument, NULL, 'o' }, + { "debug", no_argument, NULL, 'd' }, + { "help", no_argument, NULL, 'h' }, + {} + }; + enum print_type { PRINT_EXPORT, PRINT_TYPE, PRINT_LABEL, PRINT_UUID, - PRINT_RAW_LABEL, + PRINT_LABEL_RAW, } print = PRINT_EXPORT; + struct volume_id *vid = NULL; - static char name[VOLUME_ID_LABEL_SIZE]; - int i; - uint64_t size; + char label_safe[256]; + char label_enc[256]; + char uuid_enc[256]; + uint64_t size = 0; int skip_raid = 0; int probe_all = 0; - const char *node = NULL; - struct passwd *pw; + uint64_t offset = 0; + const char *node; + int fd; + const char *label, *uuid, *type, *type_version, *usage; int retval; int rc = 0; + udev_ctx = udev_new(); + if (udev_ctx == NULL) + goto exit; logging_init("vol_id"); + udev_set_log_fn(udev_ctx, log_fn); /* hook in our debug into libvolume_id */ volume_id_log_fn = vid_log; - for (i = 1 ; i < argc; i++) { - char *arg = argv[i]; + while (1) { + int option; - if (strcmp(arg, "--export") == 0) { - print = PRINT_EXPORT; - } else if (strcmp(arg, "-t") == 0) { - print = PRINT_TYPE; - } else if (strcmp(arg, "-l") == 0) { + option = getopt_long(argc, argv, "lLutxsS:aodh", options, NULL); + if (option == -1) + break; + + switch (option) { + case 'd': + debug = 1; + if (udev_get_log_priority(udev_ctx) < LOG_INFO) + udev_set_log_priority(udev_ctx, LOG_INFO); + break; + case 'l': print = PRINT_LABEL; - } else if (strcmp(arg, "-u") == 0) { + break; + case 'L': + print = PRINT_LABEL_RAW; + break; + case 'u': print = PRINT_UUID; - } else if (strcmp(arg, "-L") == 0) { - print = PRINT_RAW_LABEL; - } else if (strcmp(arg, "--skip-raid") == 0) { + break; + case 't': + print = PRINT_TYPE; + break; + case 'x': + print = PRINT_EXPORT; + break; + case 's': skip_raid = 1; - } else if (strcmp(arg, "--probe-all") == 0) { + break; + case 'a': probe_all = 1; - } else if (strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0) { - printf(help); + break; + case 'S': + if (optarg[0] != '\0') + size = strtoull(optarg, NULL, 0); + break; + case 'o': + if (optarg[0] != '\0') + offset = strtoull(optarg, NULL, 0); + break; + case 'h': + printf("Usage: vol_id [options] \n" + " --export export key/value pairs\n" + " --type filesystem type\n" + " --label filesystem label\n" + " --label-raw raw label\n" + " --uuid filesystem uuid\n" + " --skip-raid don't probe for raid\n" + " --probe-all find possibly conflicting signatures\n" + " --offset= probe at the given offset\n" + " --size= overwrite device size\n" + " --debug print debug output to stderr\n" + " --help\n\n"); + goto exit; + default: + retval = 1; goto exit; - } else - node = arg; + } } + + node = argv[optind]; if (!node) { - err("no node specified"); - fprintf(stderr, help); + err(udev_ctx, "no device\n"); + fprintf(stderr, "no device\n"); rc = 1; goto exit; } - vid = volume_id_open_node(node); + fd = open(node, O_RDONLY); + if (fd < 0) { + fprintf(stderr, "%s: error opening volume\n", node); + rc = 2; + goto exit; + } + + vid = volume_id_open_fd(fd); if (vid == NULL) { - fprintf(stderr, "%s: error open volume\n", node); rc = 2; goto exit; } - if (ioctl(vid->fd, BLKGETSIZE64, &size) != 0) - size = 0; - dbg("BLKGETSIZE64=%llu", size); + if (size == 0) { + if (ioctl(fd, BLKGETSIZE64, &size) != 0) + size = 0; + info(udev_ctx, "BLKGETSIZE64=%llu (%lluGB)\n", (unsigned long long)size, (unsigned long long)size >> 30); + } /* try to drop all privileges before reading disk content */ - pw = getpwnam ("nobody"); - if (pw != NULL && pw->pw_uid > 0 && pw->pw_gid > 0) { - dbg("dropping privileges to %u:%u", (unsigned int)pw->pw_uid, (unsigned int)pw->pw_gid); - if (setgroups(0, NULL) != 0 || - setgid(pw->pw_gid) != 0 || - setuid(pw->pw_uid) != 0) { - fprintf(stderr, "error dropping privileges: %s\n", strerror(errno)); - rc = 3; - goto exit; + if (getuid() == 0) { + struct passwd *pw; + + pw = getpwnam("nobody"); + if (pw != NULL && pw->pw_uid > 0 && pw->pw_gid > 0) { + if (setgroups(0, NULL) != 0 || + setgid(pw->pw_gid) != 0 || + setuid(pw->pw_uid) != 0) + info(udev_ctx, "unable to drop privileges: %s\n\n", strerror(errno)); } } if (probe_all) { - if (volume_id_probe_linux_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_intel_software_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_lsi_mega_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_via_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_silicon_medley_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_nvidia_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_promise_fasttrack_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_highpoint_45x_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_adaptec_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_jmicron_raid(vid, 0, size) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_vfat(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_linux_swap(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_luks(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_xfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_ext(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_reiserfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_jfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_udf(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_iso9660(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_hfs_hfsplus(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_ufs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_ntfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_cramfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_romfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_hpfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_sysv(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_minix(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_ocfs1(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_ocfs2(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_vxfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_squashfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_netware(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_gfs(vid, 0, 0) == 0) - printf("%s\n", vid->type); - if (volume_id_probe_gfs2(vid, 0, 0) == 0) - printf("%s\n", vid->type); - + volume_id_all_probers(all_probers, vid, offset, size, NULL); goto exit; } if (skip_raid) - retval = volume_id_probe_filesystem(vid, 0, size); + retval = volume_id_probe_filesystem(vid, offset, size); else - retval = volume_id_probe_all(vid, 0, size); + retval = volume_id_probe_all(vid, offset, size); if (retval != 0) { fprintf(stderr, "%s: unknown volume type\n", node); rc = 4; goto exit; } - set_str(name, vid->label, sizeof(vid->label)); - replace_untrusted_chars(name); + if (!volume_id_get_label(vid, &label) || + !volume_id_get_usage(vid, &usage) || + !volume_id_get_type(vid, &type) || + !volume_id_get_type_version(vid, &type_version) || + !volume_id_get_uuid(vid, &uuid)) { + rc = 4; + goto exit; + } + + set_str(label_safe, label, sizeof(label_safe)); + util_replace_chars(label_safe, ALLOWED_CHARS_INPUT); + + volume_id_encode_string(label, label_enc, sizeof(label_enc)); + volume_id_encode_string(uuid, uuid_enc, sizeof(uuid_enc)); switch (print) { case PRINT_EXPORT: - printf("ID_FS_USAGE=%s\n", vid->usage); - printf("ID_FS_TYPE=%s\n", vid->type); - printf("ID_FS_VERSION=%s\n", vid->type_version); - printf("ID_FS_UUID=%s\n", vid->uuid); - printf("ID_FS_LABEL=%s\n", vid->label); - printf("ID_FS_LABEL_SAFE=%s\n", name); + printf("ID_FS_USAGE=%s\n", usage); + printf("ID_FS_TYPE=%s\n", type); + printf("ID_FS_VERSION=%s\n", type_version); + printf("ID_FS_UUID=%s\n", uuid); + printf("ID_FS_UUID_ENC=%s\n", uuid_enc); + printf("ID_FS_LABEL=%s\n", label); + printf("ID_FS_LABEL_ENC=%s\n", label_enc); + printf("ID_FS_LABEL_SAFE=%s\n", label_safe); break; case PRINT_TYPE: - printf("%s\n", vid->type); + printf("%s\n", type); break; case PRINT_LABEL: - if (name[0] == '\0' || vid->usage_id == VOLUME_ID_RAID) { + if (label_safe[0] == '\0' || strcmp(usage, "raid") == 0) { rc = 3; goto exit; } - printf("%s\n", name); + printf("%s\n", label_safe); break; case PRINT_UUID: - if (vid->uuid[0] == '\0' || vid->usage_id == VOLUME_ID_RAID) { + if (uuid_enc[0] == '\0' || strcmp(usage, "raid") == 0) { rc = 4; goto exit; } - printf("%s\n", vid->uuid); + printf("%s\n", uuid_enc); break; - case PRINT_RAW_LABEL: - if (vid->label[0] == '\0' || vid->usage_id == VOLUME_ID_RAID) { + case PRINT_LABEL_RAW: + if (label[0] == '\0' || strcmp(usage, "raid") == 0) { rc = 3; goto exit; } - printf("%s\n", vid->label); + printf("%s\n", label); break; } exit: if (vid != NULL) volume_id_close(vid); - + udev_unref(udev_ctx); logging_close(); return rc; }