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| author | Eric Andersen | 2002-11-03 00:25:23 +0000 |
|---|---|---|
| committer | Eric Andersen | 2002-11-03 00:25:23 +0000 |
| commit | 97b141ac69b0bd548531f828dc7fdc892b8dd944 (patch) | |
| tree | d00f6259f19cede37e3f7451cb483fb7d7785ed7 /util-linux/swaponoff.c | |
| parent | bf1cc8b1b7a218a4c2f4bfb23ea44c74b65ebbf6 (diff) | |
| download | busybox-97b141ac69b0bd548531f828dc7fdc892b8dd944.zip busybox-97b141ac69b0bd548531f828dc7fdc892b8dd944.tar.gz | |
Test for holes in swapfiles
-Erik
Diffstat (limited to 'util-linux/swaponoff.c')
| -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); |