diff options
| -rw-r--r-- | util-linux/swaponoff.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/util-linux/swaponoff.c b/util-linux/swaponoff.c index a57dfe4..918a5bc 100644 --- a/util-linux/swaponoff.c +++ b/util-linux/swaponoff.c @@ -48,6 +48,18 @@ static const int SWAPOFF_APP = 1; static int swap_enable_disable(const char *device) { int status; + struct stat st; + + if (stat(device, &st) < 0) { + perror_msg_and_die("cannot stat %s"); + } + + /* test for holes */ + if (S_ISREG(st.st_mode)) { + if (st.st_blocks * 512 < st.st_size) { + error_msg_and_die("swap file has holes"); + } + } if (whichApp == SWAPON_APP) status = swapon(device, 0); |