Hello, I'm using util-linux-ng version 2.15 compiled from sources with internal libblkid enabled, --with-fsprobe=builtin. For test purpose I've created and assembled two partitions as an level 1 software-raid. Blkid from e2fsprogs reports these partition as follows: #:> blkid /dev/sda7 /dev/sda7: UUID="c193d159-1fd4-1a4b-4037-f3433e016f3d" TYPE="mdraid" The blkid binary build from the util-linux-ng sources just hangs forever with 100% cpu load with the same command. To exclude any linker/library problems I've created a static binary, a strace with the same call as above is below. Running the same command as a normal user and not root works, probably because there's no write access to /dev/sda7 than. Other partition types than mdraid are working, even with write access. See the output, created as normal user, below for the types I have available and also tested. Complete build log of util-linux-ng is available from [1]. Thanks and regards Juergen [1] http://jue.li/tmp/util-linux-ng-2.15-config.log ==> run as root or user with write access #> strace ./blkid.static /dev/sda7 execve("./blkid.static", ["./blkid.static", "/dev/sda7"], [/* 36 vars */]) = 0 uname({sys="Linux", node="jue", ...}) = 0 brk(0) = 0x80d6000 brk(0x80d6cb0) = 0x80d6cb0 set_thread_area({entry_number:-1 -> 6, base_addr:0x80d6830, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0 brk(0x80f7cb0) = 0x80f7cb0 brk(0x80f8000) = 0x80f8000 getuid32() = 0 geteuid32() = 0 getgid32() = 0 getegid32() = 0 prctl(0x3, 0, 0, 0, 0) = 1 getuid32() = 0 geteuid32() = 0 getgid32() = 0 getegid32() = 0 prctl(0x3, 0, 0, 0, 0) = 1 open("/etc/blkid.conf", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory) brk(0x80f7000) = 0x80f7000 open("/etc/blkid.tab", O_RDONLY|O_LARGEFILE) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=1399, ...}) = 0 fcntl64(3, F_GETFL) = 0x8000 (flags O_RDONLY|O_LARGEFILE) fstat64(3, {st_mode=S_IFREG|0644, st_size=1399, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb80d0000 _llseek(3, 0, [0], SEEK_CUR) = 0 read(3, "<device DEVNO=\"0x0801\" TIME=\"1242"..., 4096) = 1399 access("/dev/sda1", F_OK) = 0 access("/dev/sda2", F_OK) = 0 access("/dev/sda3", F_OK) = 0 access("/dev/sda5", F_OK) = 0 access("/dev/sda6", F_OK) = 0 access("/dev/sda7", F_OK) = 0 access("/dev/sda8", F_OK) = 0 access("/dev/sda9", F_OK) = 0 access("/dev/sda10", F_OK) = 0 access("/dev/sda11", F_OK) = 0 access("/dev/sda12", F_OK) = 0 access("/dev/md0", F_OK) = 0 read(3, ""..., 4096) = 0 close(3) = 0 munmap(0xb80d0000, 4096) = 0 time(NULL) = 1242308376 stat64("/dev/sda7", {st_mode=S_IFBLK|0660, st_rdev=makedev(8, 7), ...}) = 0 open("/dev/sda7", O_RDONLY|O_LARGEFILE) = 3 fstat64(3, {st_mode=S_IFBLK|0660, st_rdev=makedev(8, 7), ...}) = 0 uname({sys="Linux", node="jue", ...}) = 0 ioctl(3, BLKGETSIZE64, 0x80d7cbc) = 0 _llseek(3, 0, [0], SEEK_SET) = 0 read(3, "XFSB\0\0\20\0\0\0\0\0\0%JP\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0002"..., 69632) = 69632 _llseek(3, 10010034176, [10010034176], SEEK_SET) = 0 read(3, "\374N+\251\0\0\0\0Z\0\0\0\0\0\0\0\0\0\0\0\301\223\321Y\"^\254F\1\0\0\0@"..., 64) = 64 ==> run as user without write access $:> ./blkid.static /dev/sda1: UUID="06e42969-4921-4730-a41c-821f9d77a4f9" TYPE="xfs" /dev/sda2: UUID="672ae0cd-4c8c-460a-97fc-03f1e72fd2d6" TYPE="xfs" /dev/sda3: UUID="01345298-41a7-4180-8463-c46141323f59" TYPE="jfs" /dev/sda5: TYPE="swap" UUID="e43447df-e972-4e80-b6da-0c4385308de4" /dev/sda6: UUID="01637b47-7597-4b1c-9a01-fae5e9cf8b1e" TYPE="xfs" /dev/sda7: UUID="c193d159-1fd4-1a4b-4037-f3433e016f3d" TYPE="mdraid" /dev/sda8: UUID="c193d159-1fd4-1a4b-4037-f3433e016f3d" TYPE="mdraid" /dev/sda9: UUID="6112d739-cb37-4cfe-a993-57b5a11e4414" TYPE="ext3" /dev/sda10: UUID="512cdc40-3e36-42dd-86e1-1c855eda895b" TYPE="jfs" /dev/sda11: UUID="e42e8680-0a99-47f2-924f-056075a3f0e9" TYPE="jfs" /dev/sda12: UUID="71fb1d3d-090b-42a4-8168-34a738cec852" TYPE="jfs" /dev/md0: UUID="32033fe5-e35e-4dd2-b7df-9fec0941c07d" TYPE="xfs" -- Juergen Daubert | mailto:jue@xxxxxx Korb, Germany | http://jue.li/crux -- To unsubscribe from this list: send the line "unsubscribe util-linux-ng" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
