| /* Basic fallocate test (no specific flags is checked). |
| Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <limits.h> |
| #include <stdint.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include <support/support.h> |
| #include <support/check.h> |
| #include <support/temp_file.h> |
| |
| #define XSTR(s) STR(S) |
| #define STR(s) #s |
| |
| static char *temp_filename; |
| static int temp_fd; |
| |
| static void |
| do_prepare (int argc, char **argv) |
| { |
| temp_fd = create_temp_file ("tst-fallocate.", &temp_filename); |
| if (temp_fd == -1) |
| FAIL_EXIT1 ("cannot create temporary file: %m"); |
| } |
| #define PREPARE do_prepare |
| |
| static int |
| do_test_with_offset (off_t offset) |
| { |
| int ret; |
| struct stat finfo; |
| #define BLK_SIZE 1024 |
| char bwrite[BLK_SIZE] = { 0xf0 }; |
| char bread[BLK_SIZE]; |
| |
| /* It tries to fallocate 1024 bytes from 'offset' and then write 1024 bytes. |
| After both operation rewind the file descriptor and read 1024 bytes |
| and check if both buffer have the same contents. */ |
| ret = fallocate (temp_fd, 0, offset, BLK_SIZE); |
| if (ret == -1) |
| { |
| /* fallocate might not be fully supported by underlying filesystem (for |
| instance some NFS versions). */ |
| if (errno == EOPNOTSUPP) |
| FAIL_EXIT (77, "fallocate not supported"); |
| FAIL_EXIT1 ("fallocate failed"); |
| } |
| |
| ret = fstat (temp_fd, &finfo); |
| if (ret == -1) |
| FAIL_EXIT1 ("fstat failed"); |
| |
| if (finfo.st_size < (offset + BLK_SIZE)) |
| FAIL_EXIT1 ("size of first fallocate less than expected (%llu)", |
| (long long unsigned int)offset + BLK_SIZE); |
| |
| if (lseek (temp_fd, offset, SEEK_SET) == (off_t) -1) |
| FAIL_EXIT1 ("fseek (0, SEEK_SET) failed"); |
| |
| if (write (temp_fd, bwrite, BLK_SIZE) != BLK_SIZE) |
| FAIL_EXIT1 ("fail trying to write " XSTR (BLK_SIZE) " bytes"); |
| |
| if (lseek (temp_fd, offset, SEEK_SET) == (off_t) -1) |
| FAIL_EXIT1 ("fseek (0, SEEK_SET) failed"); |
| |
| if (read (temp_fd, bread, BLK_SIZE) != BLK_SIZE) |
| FAIL_EXIT1 ("fail trying to read " XSTR (BLK_SIZE) " bytes"); |
| |
| if (memcmp (bwrite, bread, BLK_SIZE) != 0) |
| FAIL_EXIT1 ("buffer written different than buffer readed"); |
| |
| return 0; |
| } |
| |
| /* This function is defined by the individual tests. */ |
| static int do_test (void); |
| |
| #include <support/test-driver.c> |
