2 * Copyright (c) 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
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
38 #include <sys/types.h>
49 const char *fn = "foobar";
52 check_size(const char *fn, size_t sz, int paranoia)
59 if (stat(fn, &sb) < 0)
62 errx(1, "st_size mismatch %d != %d", (int)sb.st_size, (int)sz);
66 check_size_read(int fd, size_t sz)
72 if ((old_off = lseek(fd, 0, SEEK_CUR)) < 0)
75 if (lseek(fd, 0, SEEK_SET) < 0)
80 if ((sz2 = read(fd, buf, sz)) < 0)
83 errx(1, "end before end: sz2 (%u) != sz (%u)", (unsigned)sz2,
85 if ((sz2 = lseek(fd, 0, SEEK_END)) < 0)
88 errx(1, "end past end: sz2 (%u) != sz (%u)", (unsigned)sz2,
95 main(int argc, char **argv)
99 fd = open(fn, O_RDWR | O_CREAT | O_TRUNC, 0644);
102 if (write(fd, "kaka", 4) != 4)
104 check_size(fn, 4, 1);
108 check_size(fn, 4, 0);
110 fd = open(fn, O_RDWR | O_CREAT | O_TRUNC, 644);
113 check_size(fn, 0, 1);
114 if (write(fd, "kaka", 4) != 4)
116 check_size(fn, 4, 1);
117 check_size_read(fd, 4);
120 check_size(fn, 4, 1);