Update.
[glibc.git] / posix / tst-preadwrite.c
blob9d97609836cdf01eab3b053ba93ebead9231c201
1 /* Tests for pread and pwrite.
2 Copyright (C) 1998, 2000 Free Software Foundation, Inc.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <errno.h>
21 #include <error.h>
22 #include <string.h>
23 #include <unistd.h>
26 /* Allow testing of the 64-bit versions as well. */
27 #ifndef PREAD
28 # define PREAD pread
29 # define PWRITE pwrite
30 #endif
32 #define STRINGIFY(s) STRINGIFY2 (s)
33 #define STRINGIFY2(s) #s
35 /* Prototype for our test function. */
36 extern void do_prepare (int argc, char *argv[]);
37 extern int do_test (int argc, char *argv[]);
39 /* We have a preparation function. */
40 #define PREPARE do_prepare
42 /* We might need a bit longer timeout. */
43 #define TIMEOUT 20 /* sec */
45 /* This defines the `main' function and some more. */
46 #include <test-skeleton.c>
48 /* These are for the temporary file we generate. */
49 char *name;
50 int fd;
52 void
53 do_prepare (int argc, char *argv[])
55 char name_len;
57 #define FNAME FNAME2(TRUNCATE)
58 #define FNAME2(s) "/" STRINGIFY(s) "XXXXXX"
60 name_len = strlen (test_dir);
61 name = malloc (name_len + sizeof (FNAME));
62 if (name == NULL)
63 error (EXIT_FAILURE, errno, "cannot allocate file name");
64 mempcpy (mempcpy (name, test_dir, name_len), FNAME, sizeof (FNAME));
65 add_temp_file (name);
67 /* Open our test file. */
68 fd = mkstemp (name);
69 if (fd == -1)
70 error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
74 int
75 do_test (int argc, char *argv[])
77 char buf[1000];
78 char res[1000];
79 int i;
81 memset (buf, '\0', sizeof (buf));
82 memset (res, '\xff', sizeof (res));
84 if (write (fd, buf, sizeof (buf)) != sizeof (buf))
85 error (EXIT_FAILURE, errno, "during write");
87 for (i = 100; i < 200; ++i)
88 buf[i] = i;
89 if (PWRITE (fd, buf + 100, 100, 100) != 100)
90 error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
92 for (i = 450; i < 600; ++i)
93 buf[i] = i;
94 if (PWRITE (fd, buf + 450, 150, 450) != 150)
95 error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
97 if (PREAD (fd, res, sizeof (buf) - 50, 50) != sizeof (buf) - 50)
98 error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PREAD));
100 close (fd);
101 unlink (name);
103 return memcmp (buf + 50, res, sizeof (buf) - 50);