mkswap: set errno=0 in write_all()

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/disk-utils/mkswap.c b/disk-utils/mkswap.c
index dc3a3d308b81b387cf8c1fe4ee5f5baaf938ccbb..10068b7130515d6b1e61d7cac3ef10e1ad01aeb7 100644 (file)
--- a/disk-utils/mkswap.c
+++ b/disk-utils/mkswap.c
@@ -469,8 +469,10 @@ check_mount(void) {
 static int
 write_all(int fd, const void *buf, size_t count) {
        while(count) {
-               ssize_t tmp = write(fd, buf, count);
+               ssize_t tmp;
 
+               errno = 0;
+               tmp = write(fd, buf, count);
                if (tmp > 0) {
                        count -= tmp;
                        if (count)