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=d8302bc22923ede0a52d345107b5682a66a1955e;hp=53b4cfff0ba9dec02978e710af61ce51343687fd;hb=e5931bb7d86226a3823bdf5f4ec01c857827d386;hpb=2f2c4fa442f33d7eaee02eda016d6149b9aa0be6 diff --git a/extras/volume_id/vol_id.c b/extras/volume_id/vol_id.c index 53b4cfff0..d8302bc22 100644 --- a/extras/volume_id/vol_id.c +++ b/extras/volume_id/vol_id.c @@ -1,7 +1,7 @@ /* * 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 @@ -34,48 +34,32 @@ #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; - 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; 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(NULL, priority, file, line, NULL, format, args); va_end(args); -#endif return; } @@ -126,6 +110,7 @@ static int all_probers(volume_id_probe_fn_t probe_fn, int main(int argc, char *argv[]) { + struct udev *udev; static const struct option options[] = { { "label", 0, NULL, 'l' }, { "label-raw", 0, NULL, 'L' }, @@ -134,6 +119,8 @@ int main(int argc, char *argv[]) { "export", 0, NULL, 'x' }, { "skip-raid", 0, NULL, 's' }, { "probe-all", 0, NULL, 'a' }, + { "offset", 2, NULL, 'o' }, + { "debug", 0, NULL, 'd' }, { "help", 0, NULL, 'h' }, {} }; @@ -147,19 +134,24 @@ int main(int argc, char *argv[]) } print = PRINT_EXPORT; struct volume_id *vid = NULL; - char label_safe[128]; - char uuid_safe[128]; + char label_safe[256]; + char label_enc[256]; + char uuid_enc[256]; uint64_t size; int skip_raid = 0; int probe_all = 0; + uint64_t offset = 0; const char *node; - struct passwd *pw; int fd; const char *label, *uuid, *type, *type_version, *usage; int retval; int rc = 0; + udev = udev_new(); + if (udev == NULL) + goto exit; logging_init("vol_id"); + udev_set_log_fn(udev, log_fn); /* hook in our debug into libvolume_id */ volume_id_log_fn = vid_log; @@ -167,11 +159,16 @@ int main(int argc, char *argv[]) while (1) { int option; - option = getopt_long(argc, argv, "lLutxsah", options, NULL); + option = getopt_long(argc, argv, "lLutxsaodh", options, NULL); if (option == -1) break; switch (option) { + case 'd': + debug = 1; + if (udev_get_log_priority(udev) < LOG_INFO) + udev_set_log_priority(udev, LOG_INFO); + break; case 'l': print = PRINT_LABEL; break; @@ -193,15 +190,21 @@ int main(int argc, char *argv[]) case 'a': probe_all = 1; 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" + " --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" + " --debug print debug output to stderr\n" " --help\n\n"); goto exit; default: @@ -212,7 +215,7 @@ int main(int argc, char *argv[]) node = argv[optind]; if (!node) { - err("no device"); + err(udev, "no device\n"); fprintf(stderr, "no device\n"); rc = 1; goto exit; @@ -233,31 +236,30 @@ int main(int argc, char *argv[]) if (ioctl(fd, BLKGETSIZE64, &size) != 0) size = 0; - dbg("BLKGETSIZE64=%llu", (unsigned long long)size); + info(udev, "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, "unable to drop privileges: %s\n\n", strerror(errno)); } } if (probe_all) { - volume_id_all_probers(all_probers, vid, 0, size, NULL); + 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; @@ -275,8 +277,9 @@ int main(int argc, char *argv[]) set_str(label_safe, label, sizeof(label_safe)); replace_chars(label_safe, ALLOWED_CHARS_INPUT); - set_str(uuid_safe, uuid, sizeof(uuid_safe)); - replace_chars(uuid_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: @@ -284,8 +287,9 @@ int main(int argc, char *argv[]) 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_SAFE=%s\n", uuid_safe); + 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: @@ -299,11 +303,11 @@ int main(int argc, char *argv[]) printf("%s\n", label_safe); break; case PRINT_UUID: - if (uuid_safe[0] == '\0' || strcmp(usage, "raid") == 0) { + if (uuid_enc[0] == '\0' || strcmp(usage, "raid") == 0) { rc = 4; goto exit; } - printf("%s\n", uuid_safe); + printf("%s\n", uuid_enc); break; case PRINT_LABEL_RAW: if (label[0] == '\0' || strcmp(usage, "raid") == 0) { @@ -317,7 +321,7 @@ int main(int argc, char *argv[]) exit: if (vid != NULL) volume_id_close(vid); - + udev_unref(udev); logging_close(); return rc; }