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losetup: handle symlinks in /dev/loop/ 

The loop_scandir() expects all the files in /dev/loop/ to be actual
devices and not symlinks to devices.  However, udev by default sets up
symlinks in /dev/loop/ thereby breaking the fallback scan logic when
looking for devices more than the default number of 8.

Simple way to reproduce is:
 - <detach all devices>
 - cd /dev/loop
 - rm -f [2-7]
 - losetup 0 autogen.sh
 - mv 1 8
 - for n in {1..7} ; do ln -s 0 $n ; done
 - losetup -f
	<error but should have found /dev/loop/8>

[kay.sievers@vrfy.org:  
       just a note, udev does not do that by default. It is
       devfs-nonsense, which the "default" never did.]

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Reported-by: Mario Bachmann <grafgrimm77@gmx.de>
This commit is contained in:
Mike Frysinger 2009-05-10 16:57:31 -04:00 committed by Karel Zak
parent c9239f23ac
commit 72f6902e43
1 changed files with 1 additions and 1 deletions
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2
mount/lomount.c
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@ -256,7 +256,7 @@ loop_scandir(const char *dirname, int **ary, int hasprefix)
*ary = NULL;
while((d = readdir(dir))) {
if (d->d_type != DT_BLK && d->d_type != DT_UNKNOWN)
if (d->d_type != DT_BLK && d->d_type != DT_UNKNOWN && d->d_type != DT_LNK)
continue;
n = name2minor(hasprefix, d->d_name);
if (n == -1 || n < NLOOPS_DEFAULT)