| /* Test truncating a file. |
| Copyright (C) 2011-2020 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/>. */ |
| |
| #include <config.h> |
| |
| #include <unistd.h> |
| |
| #include "signature.h" |
| SIGNATURE_CHECK (ftruncate, int, (int, off_t)); |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| |
| #include "macros.h" |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| const char *filename = argv[1]; |
| |
| /* Test behaviour for invalid file descriptors. */ |
| { |
| errno = 0; |
| ASSERT (ftruncate (-1, 0) == -1); |
| ASSERT (errno == EBADF); |
| } |
| { |
| close (99); |
| errno = 0; |
| ASSERT (ftruncate (99, 0) == -1); |
| ASSERT (errno == EBADF); |
| } |
| |
| /* Test behaviour for read-only file descriptors. */ |
| { |
| int fd = open (filename, O_RDONLY); |
| ASSERT (fd >= 0); |
| errno = 0; |
| ASSERT (ftruncate (fd, 0) == -1); |
| ASSERT (errno == EBADF || errno == EINVAL |
| || errno == EACCES /* seen on mingw */ |
| ); |
| close (fd); |
| } |
| |
| return 0; |
| } |