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Description of problem: The blkid command does not return any output when run as a non-privileged user. In Fedora 8, the blkid command would return information like volume UUIDs to a user without access to the underlying block device by reading from the file /etc/blkid/blkid.tab. In Fedora 9 this doesn't work. Strace shows that blkid attempts to open the block device and fails. Version-Release number of selected component (if applicable): e2fsprogs-1.40.8-2.fc9.x86_64 How reproducible: always Steps to Reproduce: 1. Login as a user with no r/w access to block devices 2. /sbin/blkid Actual results: No output is produced. Program exits with status 2. Expected results: Program should display volume UUIDs, labels, etc. Additional info: This is a regression from Fedora 8.
Thanks for the report. On F8 it looks like it opens & reads blkid.tab, tries to open the bdev & fails, but prints the cached info anyway, without setting the VERIFIED flag. On F9 it does almost the same, but looks like it exits on the device open failure. This is the mod that changed the behavior: http://git.kernel.org/?p=fs/ext2/e2fsprogs.git;a=commitdiff;h=838f133c72a583eae67414368e46ee0303e0a51f diff --git a/lib/blkid/probe.c b/lib/blkid/probe.c index e87c0b9..917447b 100644 --- a/lib/blkid/probe.c +++ b/lib/blkid/probe.c @@ -1155,7 +1155,7 @@ blkid_dev blkid_verify(blkid_cache cache, blkid_dev dev) if (((probe.fd = open(dev->bid_name, O_RDONLY)) < 0) || (fstat(probe.fd, &st) < 0)) { if (probe.fd >= 0) close(probe.fd); - if (errno == ENXIO || errno == ENODEV || errno == ENOENT) { + if (errno != EPERM) { blkid_free_dev(dev); return NULL; } it should probably add "&& errno != EACCES" since that's what we're getting in this case. I'll float that upstream. Thanks, -Eric
Sent upstream: http://marc.info/?l=linux-ext4&m=121191651317306&w=2
Whoops, actually this was already fixed in 1.40.10. I'll get things updated for F8. http://git.kernel.org/?p=fs/ext2/e2fsprogs.git;a=commitdiff;h=8bcaaabb1a023af4852dbf0dba76249982c62e40
Built in e2fsprogs-1.40.10-fc9 and pushed to testing...
e2fsprogs-1.40.10-1.fc9 has been submitted as an update for Fedora 9
e2fsprogs-1.40.10-1.fc9 has been pushed to the Fedora 9 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with su -c 'yum --enablerepo=updates-testing update e2fsprogs'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F9/FEDORA-2008-4808
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Fix is in F9 now, somehow the automatic bug-closer got confused I guess.