Hi Martin, On Mar 24, 2013, at 5:43 PM, Martin Steigerwald wrote: [snip] >> > > mkfs.xfs was the first and to my knowledge long time the only mkfs which > checked for existing filesystems. And it does so via blkid (at least > meanwhile, I think it used different means initially). This way it detects > all current Linux filesystems without duplicating the detection code. blkid > also detects nilfs: > > merkaba:~> mkfs.nilfs2 -L test /dev/merkaba/zeit > mkfs.nilfs2 (nilfs-utils 2.1.4) > Start writing file system initial data to the device > Blocksize:4096 Device:/dev/merkaba/zeit Device Size:21474836480 > File system initialization succeeded !! > merkaba:~> blkid /dev/merkaba/zeit > /dev/merkaba/zeit: LABEL="test" UUID="3a105634-638e-4288-8f39-0e5324361431" > TYPE="nilfs2" > > On some occasion the thought came up that it would be good to have a similar > behavior in mkfs.btrfs. And mkfs.btrfs basically got a similar > implementation provided by Eric Sandeen. I digged it out, neither > ixquick.com nor Google found it out of the box and gmane search also didn´t > yield a result. Thus manually browsed: > > http://www.mail-archive.com/linux-btrfs@xxxxxxxxxxxxxxx/msg22216.html > Thank you for detailed explanation and for the link. Yes, using of libblkid is an excellent suggestion. As I see, it exists an example for mkfs utilities in libblkid library. So, I'll do it in the way that you suggest. Thanks, Vyacheslav Dubeyko. > Ciao > -- > Martin 'Helios' Steigerwald - http://www.Lichtvoll.de > GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
