[LTP] [PATCH] commands/mkswap01: Update wait_for_file function

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> Hmm, in my case swapon -L test does not fail, if there is no 
> /dev/disk/by-label/test:
> 
> root@skholman-m7 stas]# rm /dev/disk/by-label/test
> rm: remove symbolic link `/dev/disk/by-label/test'? y
> [root@skholman-m7 stas]# BLKID_FILE=/tmp/none strace swapon -L test &> 
> /tmp/o; echo $?
> 0
> [root@skholman-m7 stas]# grep by-label /tmp/o
> stat64("/dev/disk/by-label/test", 0x7feff9b6130) = -1 ENOENT (No such 
> file or directory)
> [root@skholman-m7 stas]#
> 
> (but in the strace output I see that swapon tries to read some sectors 
> from all available block devices)
> 
> Maybe the version of libblkid plays a role here.
> 
> Using 'blkid -t' simply makes wait_for_file/wait_for_device not fail if 
> there is no /dev/disk/by-label/ symlink. I suppose 'blkid -t' could be 
> substituted with /bin/true in my case.

Unfortunately for me the swapon just looks for the symlink
(util-linux-2.19.1) while blkid -t also reads first 512 bytes of each
block device. So I guess that using blkid will not help in this case.

Then what about just changing the 'tst_resm TWARN "The file $path
haven't appeared"' from TWARN to TINFO?

-- 
Cyril Hrubis
chrubis@suse.cz