89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
/* Common f{truncate} tests definitions.
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Copyright (C) 2016-2019 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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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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static void do_prepare (void);
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#define PREPARE(argc, argv) do_prepare ()
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static int do_test (void);
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#define TEST_FUNCTION do_test ()
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#include <test-skeleton.c>
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static char *temp_filename;
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static int temp_fd;
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static void
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do_prepare (void)
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{
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temp_fd = create_temp_file ("tst-trucate.", &temp_filename);
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if (temp_fd == -1)
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{
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printf ("cannot create temporary file: %m\n");
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exit (1);
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}
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}
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#define FAIL(str) \
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do { printf ("error: %s (line %d)\n", str, __LINE__); return 1; } while (0)
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static int
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do_test_with_offset (off_t offset)
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{
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struct stat st;
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char buf[1000];
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memset (buf, 0xcf, sizeof (buf));
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if (pwrite (temp_fd, buf, sizeof (buf), offset) != sizeof (buf))
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FAIL ("write failed");
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if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + sizeof (buf)))
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FAIL ("initial size wrong");
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if (ftruncate (temp_fd, offset + 800) < 0)
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FAIL ("size reduction with ftruncate failed");
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if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + 800))
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FAIL ("size after reduction with ftruncate is incorrect");
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/* The following test covers more than POSIX. POSIX does not require
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that ftruncate() can increase the file size. But we are testing
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Unix systems. */
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if (ftruncate (temp_fd, offset + 1200) < 0)
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FAIL ("size increate with ftruncate failed");
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if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + 1200))
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FAIL ("size after increase is incorrect");
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if (truncate (temp_filename, offset + 800) < 0)
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FAIL ("size reduction with truncate failed");
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if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + 800))
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FAIL ("size after reduction with truncate incorrect");
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/* The following test covers more than POSIX. POSIX does not require
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that truncate() can increase the file size. But we are testing
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Unix systems. */
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if (truncate (temp_filename, (offset + 1200)) < 0)
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FAIL ("size increase with truncate failed");
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if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + 1200))
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FAIL ("size increase with truncate is incorrect");
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return 0;
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}
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