df: fix "df /"

also, clean up mount checks in mkfs/fsck.

function                                             old     new   delta
find_mount_point                                     243     261     +18
sha1_process_block64                                 497     510     +13
find_main                                            436     444      +8
display_speed                                         85      90      +5
df_main                                              795     793      -2
parse_command                                       1463    1460      -3
static.ignored_mounts                                  8       -      -8
mkfs_minix_main                                     2962    2937     -25
fsck_minix_main                                     3065    2970     -95
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 4/4 up/down: 44/-133)           Total: -89 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/loginutils/getty.c b/loginutils/getty.c
index 34b09cecc..838adf2e7 100644
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -239,7 +239,7 @@ static void open_tty(const char *tty)
 //              cur_dir_fd = xopen(".", O_DIRECTORY | O_NONBLOCK);
 //              xchdir("/dev");
 //              xstat(tty, &st);
-//              if ((st.st_mode & S_IFMT) != S_IFCHR)
+//              if (!S_ISCHR(st.st_mode))
 //                      bb_error_msg_and_die("%s: not a character device", tty);
 
                 if (tty[0] != '/')