From 18a064438f020ec9358c33efdfc172cd04bdff38 Mon Sep 17 00:00:00 2001 From: Ed Schouten Date: Sat, 11 Apr 2009 14:33:10 +0000 Subject: [PATCH] Use ftruncate() instead of lseek()+write()+lseek() to set the created file (-C) to the requested size. Submitted by: Christoph Mallon --- sbin/newfs_msdos/newfs_msdos.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/sbin/newfs_msdos/newfs_msdos.c b/sbin/newfs_msdos/newfs_msdos.c index cccc9e9402c..0b787717037 100644 --- a/sbin/newfs_msdos/newfs_msdos.c +++ b/sbin/newfs_msdos/newfs_msdos.c @@ -356,17 +356,13 @@ main(int argc, char *argv[]) } dtype = *argv; if (opt_create) { - off_t pos; - if (opt_N) errx(1, "create (-C) is incompatible with -N"); fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644); if (fd == -1) errx(1, "failed to create %s", fname); - pos = lseek(fd, opt_create - 1, SEEK_SET); - if (write(fd, "\0", 1) != 1) + if (ftruncate(fd, opt_create)) errx(1, "failed to initialize %jd bytes", (intmax_t)opt_create); - pos = lseek(fd, 0, SEEK_SET); } else if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1 || fstat(fd, &sb)) err(1, "%s", fname);