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author | ed <ed@FreeBSD.org> | 2009-04-11 14:33:10 +0000 |
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committer | ed <ed@FreeBSD.org> | 2009-04-11 14:33:10 +0000 |
commit | 9f361d5f3eaa36786458891796c4d1c7df17212c (patch) | |
tree | 38ddd17e8d35b3694d4b5319f1d80d3de4c2b952 /sbin | |
parent | 9b05913c11944ede886f15a7d29725de2774fbcb (diff) | |
download | FreeBSD-src-9f361d5f3eaa36786458891796c4d1c7df17212c.zip FreeBSD-src-9f361d5f3eaa36786458891796c4d1c7df17212c.tar.gz |
Use ftruncate() instead of lseek()+write()+lseek() to set the created
file (-C) to the requested size.
Submitted by: Christoph Mallon <christoph mallon gmx de>
Diffstat (limited to 'sbin')
-rw-r--r-- | sbin/newfs_msdos/newfs_msdos.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/sbin/newfs_msdos/newfs_msdos.c b/sbin/newfs_msdos/newfs_msdos.c index cccc9e9..0b78771 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); |