| /* Test of lseek() function. |
| Copyright (C) 2007-2020 Free Software Foundation, Inc. |
| |
| 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 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 |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 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, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Eric Blake, 2007. */ |
| |
| #include <config.h> |
| |
| #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 (int argc, char **argv) |
| { |
| 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); |
| |
| /* Test behaviour for invalid file descriptors. */ |
| errno = 0; |
| ASSERT (lseek (-1, (off_t)0, SEEK_CUR) == -1); |
| ASSERT (errno == EBADF); |
| |
| close (99); |
| errno = 0; |
| ASSERT (lseek (99, (off_t)0, SEEK_CUR) == -1); |
| ASSERT (errno == EBADF); |
| |
| break; |
| |
| default: |
| return 1; |
| } |
| return 0; |
| } |