util-linux/util-linux-2.13-mkswap-mounted.patch
kzak 04e2fdeac1 - fix #209911 - losetup.8 updated (use dm-crypt rather than deprecated
cryptoloop)
- fix #210338 - spurious error from '/bin/login -h $PHONENUMBER' (bug in
    IPv6 patch)
- fix #208634 - mkswap "works" without warning on a mounted device
2006-10-12 10:10:37 +00:00

63 lines
1.6 KiB
Diff

--- util-linux-2.13-pre6/disk-utils/mkswap.c.kzak 2006-10-12 11:33:50.000000000 +0200
+++ util-linux-2.13-pre6/disk-utils/mkswap.c 2006-10-12 11:36:08.000000000 +0200
@@ -36,6 +36,7 @@
#include <string.h>
#include <fcntl.h>
#include <stdlib.h>
+#include <mntent.h>
#include <sys/ioctl.h> /* for _IO */
#include <sys/utsname.h>
#include <sys/stat.h>
@@ -485,6 +486,29 @@
return (c >= '1' && c <= '9');
}
+
+/*
+ * Check to make certain that our new filesystem won't be created on
+ * an already mounted partition. Code adapted from mke2fs, Copyright
+ * (C) 1994 Theodore Ts'o. Also licensed under GPL.
+ * (C) 2006 Karel Zak -- port to mkswap
+ */
+static int
+check_mount(void) {
+ FILE * f;
+ struct mntent * mnt;
+
+ if ((f = setmntent (MOUNTED, "r")) == NULL)
+ return 0;
+ while ((mnt = getmntent (f)) != NULL)
+ if (strcmp (device_name, mnt->mnt_fsname) == 0)
+ break;
+ endmntent (f);
+ if (!mnt)
+ return 0;
+ return 1;
+}
+
int
main(int argc, char ** argv) {
struct stat statbuf;
@@ -648,8 +672,19 @@
/* Want a block device. Probably not /dev/hda or /dev/hdb. */
if (!S_ISBLK(statbuf.st_mode))
check=0;
- else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
- die(_("Will not try to make swapdevice on '%s'"));
+ else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340) {
+ fprintf(stderr,
+ _("%s: error: "
+ "will not try to make swapdevice on '%s'\n"),
+ program_name, device_name);
+ exit(1);
+ } else if (check_mount()) {
+ fprintf(stderr,
+ _("%s: error: "
+ "%s is mounted; will not make swapspace.\n"),
+ program_name, device_name);
+ exit(1);
+ }
#ifdef __sparc__
if (!force && version == 0) {