2 * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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40 #include <sys/types.h>
50 #define MAP_FAILED ((void *)-1)
54 generate_random_file(const char *filename, unsigned npages, unsigned pagesize,
62 size_t sz = npages * pagesize;
66 err(1, "malloc %u", (unsigned)sz);
68 for (i = 0; i < npages; ++i)
69 memset(buf + pagesize * i, '0' + i, pagesize);
71 fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0666);
73 err(1, "open %s", filename);
75 if (ftruncate(fd, sz) < 0)
78 prot = PROT_READ | PROT_WRITE;
81 fbuf = mmap(0, sz, prot, flags, fd, 0);
82 if (fbuf == (void *)MAP_FAILED)
86 if (write(fd, "hej\n", 4) != 4)
90 memcpy(fbuf, buf, sz);
93 if (msync(fbuf, sz, MS_SYNC))
97 if (munmap(fbuf, sz) != 0)
106 read_file(int fd, size_t sz)
113 err(1, "malloc %u", (unsigned)sz);
114 ret = read(fd, buf, sz);
118 errx(1, "short read %d < %u", (int)ret, (unsigned)sz);
123 test(const char *file, int writep)
125 const size_t sz = 4 * getpagesize();
131 buf = generate_random_file(file, 4, getpagesize(), writep);
133 fd = open(file, O_RDONLY, 0);
135 err(1, "open %s", file);
137 malloc_buf = read_file(fd, sz);
139 ret = memcmp(buf, malloc_buf, sz);
147 main(int argc, char **argv)
153 if (test("foo", 1) != 0)
155 if (test("bar", 0) != 0)