1 /* Tests for pread64 and pwrite64. 2 Copyright (C) 2000-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #define _FILE_OFFSET_BITS 64 20 #include "tst-preadwrite-common.c" 21 22 static int do_test(void)23do_test (void) 24 { 25 ssize_t ret; 26 27 ret = do_test_with_offset (0); 28 if (ret == -1) 29 return 1; 30 31 /* Create a sparse file larger than 4GB to check if offset is handled 32 correctly in p{write,read}64. */ 33 off_t base_offset = UINT32_MAX + 2048LL; 34 ret = do_test_with_offset (base_offset); 35 if (ret == -1) 36 return 1; 37 38 struct stat st; 39 if (fstat (fd, &st) == -1) 40 { 41 printf ("error: fstat on temporary file failed: %m"); 42 return 1; 43 } 44 45 /* The file size should >= base_offset plus bytes read. */ 46 off_t expected_value = base_offset + ret; 47 if (st.st_size < expected_value) 48 { 49 printf ("error: file size less than expected (%jd > %jd)\n", 50 (intmax_t) expected_value, (intmax_t) st.st_size); 51 return 1; 52 } 53 54 return 0; 55 } 56