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3bbee82a56
Test p{read,write}64 with offset > 4GB. Since it is not an error for a
successful pread/pwrite call to transfer fewer bytes than requested, we
should check if the return value is -1. No need to close and unlink
temporary file, which is handled by test-skeleton.c.
[BZ #20350]
* posix/tst-preadwrite.c: Renamed to ...
* posix/tst-preadwrite-common.c: This.
(PREAD): Removed.
(PWRITE): Likewise.
(STRINGIFY): Likewise.
(STRINGIFY2): Likewise.
(do_prepare): Make it static and remove function arguments.
(do_test): Likewise.
(PREPARE): Updated.
(TEST_FUNCTION): New.
(name): Make it static.
(fd): Likewise.
(do_prepare): Use create_temp_file.
(do_test): Renamed to ...
(do_test_with_offset): This. Make it static and accept offset.
Properly check return value of PWRITE and PREAD. Return bytes
read. Don't close fd nor unlink name.
* posix/tst-preadwrite.c: Rewrite.
* posix/tst-preadwrite64.c: Likewise.
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/* Tests for pread64 and pwrite64.
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Copyright (C) 2000-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#define _FILE_OFFSET_BITS 64
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#include "tst-preadwrite-common.c"
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static int
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do_test (void)
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{
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ssize_t ret;
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ret = do_test_with_offset (0);
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if (ret == -1)
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return 1;
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/* Create a sparse file larger than 4GB to check if offset is handled
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correctly in p{write,read}64. */
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off_t base_offset = UINT32_MAX + 2048LL;
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ret = do_test_with_offset (base_offset);
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if (ret == -1)
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return 1;
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struct stat st;
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if (fstat (fd, &st) == -1)
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{
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printf ("error: fstat on temporary file failed: %m");
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return 1;
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}
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/* The file size should >= base_offset plus bytes read. */
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off_t expected_value = base_offset + ret;
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if (st.st_size < expected_value)
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{
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printf ("error: file size less than expected (%jd > %jd)\n",
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(intmax_t) expected_value, (intmax_t) st.st_size);
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return 1;
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}
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return 0;
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}
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