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133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/* Tests for ftruncate and truncate.
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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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Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
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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 <errno.h>
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#include <error.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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/* Allow testing of the 64-bit versions as well. */
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#ifndef TRUNCATE
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# define TRUNCATE truncate
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# define FTRUNCATE ftruncate
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#endif
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#define STRINGIFY(s) STRINGIFY2 (s)
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#define STRINGIFY2(s) #s
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/* Prototype for our test function. */
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extern void do_prepare (int argc, char *argv[]);
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extern int do_test (int argc, char *argv[]);
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/* We have a preparation function. */
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#define PREPARE do_prepare
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/* We might need a bit longer timeout. */
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#define TIMEOUT 20 /* sec */
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/* This defines the `main' function and some more. */
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#include <test-skeleton.c>
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/* These are for the temporary file we generate. */
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char *name;
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int fd;
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void
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do_prepare (int argc, char *argv[])
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{
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size_t name_len;
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#define FNAME FNAME2(TRUNCATE)
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#define FNAME2(s) "/" STRINGIFY(s) "XXXXXX"
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name_len = strlen (test_dir);
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name = malloc (name_len + sizeof (FNAME));
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mempcpy (mempcpy (name, test_dir, name_len), FNAME, sizeof (FNAME));
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add_temp_file (name);
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/* Open our test file. */
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fd = mkstemp (name);
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if (fd == -1)
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error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
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}
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int
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do_test (int argc, char *argv[])
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{
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struct stat st;
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char buf[1000];
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memset (buf, '\0', sizeof (buf));
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if (write (fd, buf, sizeof (buf)) != sizeof (buf))
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error (EXIT_FAILURE, errno, "during write");
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if (fstat (fd, &st) < 0 || st.st_size != sizeof (buf))
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error (EXIT_FAILURE, 0, "initial size wrong");
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if (FTRUNCATE (fd, 800) < 0)
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error (EXIT_FAILURE, errno, "size reduction with %s failed",
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STRINGIFY (FTRUNCATE));
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if (fstat (fd, &st) < 0 || st.st_size != 800)
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error (EXIT_FAILURE, 0, "size after reduction with %s incorrect",
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STRINGIFY (FTRUNCATE));
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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 (fd, 1200) < 0)
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error (EXIT_FAILURE, errno, "size increase with %s failed",
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STRINGIFY (FTRUNCATE));
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if (fstat (fd, &st) < 0 || st.st_size != 1200)
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error (EXIT_FAILURE, 0, "size after increase with %s incorrect",
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STRINGIFY (FTRUNCATE));
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if (TRUNCATE (name, 800) < 0)
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error (EXIT_FAILURE, errno, "size reduction with %s failed",
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STRINGIFY (TRUNCATE));
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if (fstat (fd, &st) < 0 || st.st_size != 800)
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error (EXIT_FAILURE, 0, "size after reduction with %s incorrect",
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STRINGIFY (TRUNCATE));
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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 (name, 1200) < 0)
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error (EXIT_FAILURE, errno, "size increase with %s failed",
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STRINGIFY (TRUNCATE));
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if (fstat (fd, &st) < 0 || st.st_size != 1200)
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error (EXIT_FAILURE, 0, "size after increase with %s incorrect",
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STRINGIFY (TRUNCATE));
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close (fd);
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unlink (name);
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return 0;
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}
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