/* Test of lseek() function.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2011 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Eric Blake, 2007. */
#include <unistd.h>
+#include "signature.h"
+SIGNATURE_CHECK (lseek, off_t, (int, off_t, int));
+
+#include <errno.h>
+
+#include "macros.h"
+
+/* ARGC must be 2; *ARGV[1] is '0' if stdin and stdout are files, '1'
+ if they are pipes, and '2' if they are closed. Check for proper
+ semantics of lseek. */
int
-main ()
+main (int argc, char **argv)
{
- /* Exit with success only if stdin is seekable. */
- return lseek (0, (off_t)0, SEEK_CUR) < 0;
+ if (argc != 2)
+ return 2;
+ switch (*argv[1])
+ {
+ case '0': /* regular files */
+ ASSERT (lseek (0, (off_t)2, SEEK_SET) == 2);
+ ASSERT (lseek (0, (off_t)-4, SEEK_CUR) == -1);
+ ASSERT (errno == EINVAL);
+ errno = 0;
+#if ! defined __BEOS__
+ /* POSIX says that the last lseek call, when failing, does not change
+ the current offset. But BeOS sets it to 0. */
+ ASSERT (lseek (0, (off_t)0, SEEK_CUR) == 2);
+#endif
+#if 0 /* leads to SIGSYS on IRIX 6.5 */
+ ASSERT (lseek (0, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
+ ASSERT (errno == EINVAL);
+#endif
+ ASSERT (lseek (1, (off_t)2, SEEK_SET) == 2);
+ errno = 0;
+ ASSERT (lseek (1, (off_t)-4, SEEK_CUR) == -1);
+ ASSERT (errno == EINVAL);
+ errno = 0;
+#if ! defined __BEOS__
+ /* POSIX says that the last lseek call, when failing, does not change
+ the current offset. But BeOS sets it to 0. */
+ ASSERT (lseek (1, (off_t)0, SEEK_CUR) == 2);
+#endif
+#if 0 /* leads to SIGSYS on IRIX 6.5 */
+ ASSERT (lseek (1, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
+ ASSERT (errno == EINVAL);
+#endif
+ break;
+
+ case '1': /* pipes */
+ errno = 0;
+ ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
+ ASSERT (errno == ESPIPE);
+ errno = 0;
+ ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
+ ASSERT (errno == ESPIPE);
+ break;
+
+ case '2': /* closed */
+ /* Explicitly close file descriptors 0 and 1. The <&- and >&- in the
+ invoking shell are not enough on HP-UX. */
+ close (0);
+ close (1);
+ errno = 0;
+ ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
+ ASSERT (errno == EBADF);
+ errno = 0;
+ ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
+ ASSERT (errno == EBADF);
+ break;
+
+ default:
+ return 1;
+ }
+ return 0;
}