find_mount_point: fix find_mount_point for char devices
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>
diff --git a/libbb/find_mount_point.c b/libbb/find_mount_point.c
index 56637ad..9676b5f 100644
--- a/libbb/find_mount_point.c
+++ b/libbb/find_mount_point.c
@@ -30,7 +30,8 @@
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;
}