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);