[src/trunk]: src/sbin/resize_lfs don't use sprintf

[dholland <dholland%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/30ce5d1ae583
branches:  trunk
changeset: 794749:30ce5d1ae583
user:      dholland <dholland%NetBSD.org@localhost>
date:      Sun Mar 23 05:26:23 2014 +0000

description:
don't use sprintf

diffstat:

 sbin/resize_lfs/resize_lfs.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (29 lines):

diff -r eafe2a9bc044 -r 30ce5d1ae583 sbin/resize_lfs/resize_lfs.c
--- a/sbin/resize_lfs/resize_lfs.c      Sun Mar 23 05:07:59 2014 +0000
+++ b/sbin/resize_lfs/resize_lfs.c      Sun Mar 23 05:26:23 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: resize_lfs.c,v 1.7 2013/06/19 01:07:55 christos Exp $  */
+/*     $NetBSD: resize_lfs.c,v 1.8 2014/03/23 05:26:23 dholland Exp $  */
 /*-
  * Copyright (c) 2005 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -60,6 +60,7 @@
 main(int argc, char **argv)
 {
        char *rdev, *fsname, buf[LFS_SBPAD];
+       size_t rdevlen;
        daddr_t newsize, newnsegs;
        int devfd, rootfd;
        int ch, i, verbose;
@@ -95,8 +96,9 @@
         */
        if (statvfs(fsname, &vfs) < 0)
                err(1, "%s", fsname);
-       rdev = (char *)malloc(strlen(vfs.f_mntfromname + 2));
-       sprintf(rdev, "/dev/r%s", vfs.f_mntfromname + 5);
+       rdevlen = strlen(vfs.f_mntfromname) + 2;
+       rdev = malloc(rdevlen);
+       snprintf(rdev, rdevlen, "/dev/r%s", vfs.f_mntfromname + 5);
        devfd = open(rdev, O_RDONLY);
        if (devfd < 0)
                err(1, "open raw device");