The POSIX spec for sscanf() says that whitespace may be matched against 0
bytes which means doing sscanf(" %s") against "#foo" will result in a
match. You can see this behavior by using the verbose options on a garbage
file:
...
mount: you didn't specify a filesystem type for /dev/null
I will try all types mentioned in /etc/filesystems or /proc/filesystems
Trying #
mount: mount(2) syscall: source: "/dev/null", target: "/", filesystemtype: "#", mountflags: -1058209792, data: (null)
Trying #vfat
mount: mount(2) syscall: source: "/dev/null", target: "/", filesystemtype: "#vfat", mountflags: -1058209792, data: (null)
...
Reported-by: Dave Barton <dave.barton@xxxxxxxxxx>
Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx>
---
mount/mount.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/mount/mount.c b/mount/mount.c
index 0f1fc5a..0f986df 100644
--- a/mount/mount.c
+++ b/mount/mount.c
@@ -782,8 +782,8 @@ procfsnext(FILE *procfs) {
char fsname[100];
while (fgets(line, sizeof(line), procfs)) {
- if (sscanf (line, "nodev %[^\n]\n", fsname) == 1) continue;
- if (sscanf (line, " %[^ \n]\n", fsname) != 1) continue;
+ if (sscanf (line, "nodev %[^#\n]\n", fsname) == 1) continue;
+ if (sscanf (line, " %[^# \n]\n", fsname) != 1) continue;
return xstrdup(fsname);
}
return 0;
--
1.7.0
--
To unsubscribe from this list: send the line "unsubscribe util-linux-ng" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
