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[arla.git] / tests / write-error.c
bloba6622a334bd667e07242de454ec350aa535252ab
1 /*
2 * Copyright (c) 2000 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
34 #ifdef HAVE_CONFIG_H
35 #include <config.h>
36 #endif
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <errno.h>
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #include <sys/mman.h>
46 #include <fcntl.h>
47 #include <unistd.h>
48 #include <dirent.h>
50 #include <roken.h>
52 #include <err.h>
54 #ifndef MAP_FAILED
55 #define MAP_FAILED ((void *)-1)
56 #endif
58 RCSID("$Id$");
60 static void
61 doit (const char *filename)
63 size_t sz = getpagesize();
64 int fd;
65 int ret;
66 void *buf;
68 fd = open (filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
69 if (fd < 0)
70 err (1, "open %s", filename);
71 #ifdef MAP_ANON
72 buf = mmap (NULL, sz, PROT_READ|PROT_WRITE,
73 MAP_ANON|MAP_PRIVATE, -1, 0);
74 #else
76 int fd;
78 fd = open ("/dev/zero", O_RDWR);
79 if (fd < 0)
80 err (1, "open /dev/zero");
81 buf = mmap (NULL, sz, PROT_READ | PROT_WRITE,
82 MAP_PRIVATE, fd, 0);
83 close (fd);
85 #endif
86 ret = munmap (buf, sz);
87 if (ret < 0)
88 err (1, "munmap %s", filename);
90 ret = write(fd, buf, 1);
91 if (ret != -1)
92 err (1, "write did not fail %s", filename);
94 ret = close (fd);
95 if (ret < 0)
96 err (1, "close %s", filename);
99 int
100 main(int argc, char **argv)
102 const char *file = "foo";
104 setprogname (argv[0]);
105 if (argc != 1 && argc != 2)
106 errx (1, "usage: %s [file]", argv[0]);
107 if (argc == 2)
108 file = argv[1];
109 doit (file);
110 return 0;