Hi to all,
This patch is useful for:
1) remove an unused var from extern char *find_real_root_device_name(const char* name)
changing it to extern char *find_real_root_device_name(void).
2) fixes include/libbb.h, coreutils/df.c, util-linux/mount.c and util-linux/umount.c accordingly.
3) fixes a bug, really a false positive, in find_real_root_device_name() that happens if
in the /dev directory exists a link named root (/dev/root) that should be skipped but
is not. This affects applets like df that display wrong results
device ID iff the named file is a character or block special device. Otherwise
it is meaningless junk, in which case st_dev should be used. This was done
incorrectly, which could cause mount to display bogus mount info.
-Erik
1) fixed a bug that could crash df, mount, and umount applets if the root
device name was longer then the word "root" (/dev/loop1 vs /dev/root) -
2) severl functions needed static declaration in the umount applet
3) update declaration for function in last_char_is() in libbb
