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92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/* Tests for pread and pwrite.
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Copyright (C) 1998 Free Software Foundation, Inc.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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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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/* 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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char name_len;
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name_len = strlen (test_dir);
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name = malloc (name_len + sizeof ("/preadwriteXXXXXX"));
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mempcpy (mempcpy (name, test_dir, name_len),
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"/preadwriteXXXXXX", sizeof ("/preadwriteXXXXXX"));
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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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char buf[1000];
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char res[1000];
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int i;
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memset (buf, '\0', sizeof (buf));
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memset (res, '\xff', sizeof (res));
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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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for (i = 100; i < 200; ++i)
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buf[i] = i;
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if (pwrite (fd, buf + 100, 100, 100) != 100)
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error (EXIT_FAILURE, errno, "during pwrite");
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for (i = 450; i < 600; ++i)
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buf[i] = i;
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if (pwrite (fd, buf + 450, 150, 450) != 150)
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error (EXIT_FAILURE, errno, "during pwrite");
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if (pread (fd, res, sizeof (buf) - 50, 50) != sizeof (buf) - 50)
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error (EXIT_FAILURE, errno, "during pread");
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close (fd);
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unlink (name);
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return memcmp (buf + 50, res, sizeof (buf) - 50);
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}
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