diff options
| -rw-r--r-- | miscutils/mountpoint.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/miscutils/mountpoint.c b/miscutils/mountpoint.c index b541ce2..a35c389 100644 --- a/miscutils/mountpoint.c +++ b/miscutils/mountpoint.c @@ -55,8 +55,17 @@ int mountpoint_main(int argc UNUSED_PARAM, char **argv) if (opt & OPT_d) printf("%u:%u\n", major(st_dev), minor(st_dev)); - if (opt & OPT_n) - printf("%s %s\n", find_block_device(arg), arg); + if (opt & OPT_n) { + const char *d = find_block_device(arg); + /* name is undefined, but device is mounted -> anonymous superblock! */ + /* happens with btrfs */ + if (!d) { + d = "UNKNOWN"; + /* TODO: iterate /proc/mounts, or /proc/self/mountinfo + * to find out the device name */ + } + printf("%s %s\n", d, arg); + } if (!(opt & (OPT_q | OPT_d | OPT_n))) printf("%s is %sa mountpoint\n", arg, is_not_mnt ? "not " : ""); return is_not_mnt; |