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find_mount_point: fix find_mount_point for char devices

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This allows to find mount points of 'char' devices such as UBI volumes
which otherwise fail for example with 'df' command:

/ # df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root             72091984  12360980  56068924  18% /
devtmpfs                115236         4    115232   0% /dev
tmpfs                    28672        32     28640   0% /tmp
/dev/ubi0_0             360268     18348    341920   5% /tmp/mnt/userfs

/ # df /dev/ubi0_0
Filesystem           1K-blocks      Used Available Use% Mounted on
devtmpfs                115236         4    115232   0% /dev

Signed-off-by: Javier Viguera <javier.viguera@digi.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Javier Viguera 2012-01-18 01:49:11 +01:00 committed by Denys Vlasenko
parent fdd0b3b398
commit ce4f39ac7c
1 changed files with 2 additions and 1 deletions
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3
libbb/find_mount_point.c
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@ -30,7 +30,8 @@ struct mntent* FAST_FUNC find_mount_point(const char *name, int subdir_too)
devno_of_name = s.st_dev;
block_dev = 0;
if (S_ISBLK(s.st_mode)) {
/* Why S_ISCHR? - UBI volumes use char devices, not block */
if (S_ISBLK(s.st_mode) || S_ISCHR(s.st_mode)) {
devno_of_name = s.st_rdev;
block_dev = 1;
}