diff options
author | Florian Weimer <fweimer@redhat.com> | 2018-02-02 10:46:26 +0100 |
---|---|---|
committer | Florian Weimer <fweimer@redhat.com> | 2018-02-02 10:46:26 +0100 |
commit | d4b4a00a462348750bb18544eb30853ee6ac5d10 (patch) | |
tree | ede7a1a13907496496c48e436a5b5dc85be3ac2e /misc/tst-preadvwritev-common.c | |
parent | 84c94d2fd90d84ae7e67657ee8e22c2d1b796f63 (diff) | |
download | glibc-d4b4a00a462348750bb18544eb30853ee6ac5d10.zip glibc-d4b4a00a462348750bb18544eb30853ee6ac5d10.tar.gz glibc-d4b4a00a462348750bb18544eb30853ee6ac5d10.tar.bz2 |
preadv2/pwritev2: Handle offset == -1 [BZ #22753]
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'misc/tst-preadvwritev-common.c')
-rw-r--r-- | misc/tst-preadvwritev-common.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/misc/tst-preadvwritev-common.c b/misc/tst-preadvwritev-common.c index 560c8f8..b59a3de 100644 --- a/misc/tst-preadvwritev-common.c +++ b/misc/tst-preadvwritev-common.c @@ -16,6 +16,7 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#include <array_length.h> #include <stdio.h> #include <stdint.h> #include <errno.h> @@ -25,6 +26,7 @@ #include <support/check.h> #include <support/temp_file.h> +#include <support/xunistd.h> static char *temp_filename; static int temp_fd; @@ -50,6 +52,42 @@ do_prepare (int argc, char **argv) pwritev (__fd, __iov, __iovcnt, __offset) #endif +static __attribute__ ((unused)) void +do_test_without_offset (void) +{ + xftruncate (temp_fd, 0); + + xwrite (temp_fd, "123", 3); + xlseek (temp_fd, 2, SEEK_SET); + { + struct iovec iov[] = + { + { (void *) "abc", 3 }, + { (void *) "xyzt", 4 }, + }; + TEST_COMPARE (PWRITEV (temp_fd, iov, array_length (iov), -1), 7); + } + TEST_COMPARE (xlseek (temp_fd, 0, SEEK_CUR), 9); + + xlseek (temp_fd, 1, SEEK_SET); + char buf1[3]; + char buf2[2]; + { + struct iovec iov[] = + { + { buf1, sizeof (buf1) }, + { buf2, sizeof (buf2) }, + }; + TEST_COMPARE (PREADV (temp_fd, iov, array_length (iov), -1), + sizeof (buf1) + sizeof (buf2)); + TEST_COMPARE (memcmp ("2ab", buf1, sizeof (buf1)), 0); + TEST_COMPARE (memcmp ("cx", buf2, sizeof (buf2)), 0); + TEST_COMPARE (xlseek (temp_fd, 0, SEEK_CUR), 6); + } + + xftruncate (temp_fd, 0); +} + static int do_test_with_offset (off_t offset) { |