110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/* Test of lseek() function.
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Copyright (C) 2007-2021 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Eric Blake, 2007. */
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#include <config.h>
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#include <unistd.h>
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#include "signature.h"
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SIGNATURE_CHECK (lseek, off_t, (int, off_t, int));
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#include <errno.h>
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#include "macros.h"
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/* ARGC must be 2; *ARGV[1] is '0' if stdin and stdout are files, '1'
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if they are pipes, and '2' if they are closed. Check for proper
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semantics of lseek. */
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int
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main (int argc, char **argv)
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{
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if (argc != 2)
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return 2;
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switch (*argv[1])
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{
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case '0': /* regular files */
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ASSERT (lseek (0, (off_t)2, SEEK_SET) == 2);
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ASSERT (lseek (0, (off_t)-4, SEEK_CUR) == -1);
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ASSERT (errno == EINVAL);
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errno = 0;
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#if ! defined __BEOS__
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/* POSIX says that the last lseek call, when failing, does not change
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the current offset. But BeOS sets it to 0. */
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ASSERT (lseek (0, (off_t)0, SEEK_CUR) == 2);
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#endif
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#if 0 /* leads to SIGSYS on IRIX 6.5 */
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ASSERT (lseek (0, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
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ASSERT (errno == EINVAL);
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#endif
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ASSERT (lseek (1, (off_t)2, SEEK_SET) == 2);
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errno = 0;
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ASSERT (lseek (1, (off_t)-4, SEEK_CUR) == -1);
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ASSERT (errno == EINVAL);
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errno = 0;
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#if ! defined __BEOS__
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/* POSIX says that the last lseek call, when failing, does not change
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the current offset. But BeOS sets it to 0. */
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ASSERT (lseek (1, (off_t)0, SEEK_CUR) == 2);
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#endif
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#if 0 /* leads to SIGSYS on IRIX 6.5 */
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ASSERT (lseek (1, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
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ASSERT (errno == EINVAL);
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#endif
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break;
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case '1': /* pipes */
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errno = 0;
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ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
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ASSERT (errno == ESPIPE);
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errno = 0;
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ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
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ASSERT (errno == ESPIPE);
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break;
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case '2': /* closed */
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/* Explicitly close file descriptors 0 and 1. The <&- and >&- in the
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invoking shell are not enough on HP-UX. */
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close (0);
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close (1);
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errno = 0;
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ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
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ASSERT (errno == EBADF);
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errno = 0;
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ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
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ASSERT (errno == EBADF);
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/* Test behaviour for invalid file descriptors. */
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errno = 0;
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ASSERT (lseek (-1, (off_t)0, SEEK_CUR) == -1);
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ASSERT (errno == EBADF);
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close (99);
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errno = 0;
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ASSERT (lseek (99, (off_t)0, SEEK_CUR) == -1);
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ASSERT (errno == EBADF);
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break;
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default:
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return 1;
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}
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return 0;
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}
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