tests/sleepwriter.c

   1 /*
   2  * Copyright (c) 2001, 2006 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.
  12  *
  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.
  16  *
  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.
  20  *
  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.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <sys/types.h>
  41 #include <fcntl.h>
  42 #include <unistd.h>
  43
  44 #include <roken.h>
  45 #include <err.h>
  46
  47 RCSID("$Id$");
  48
  49 #define BUF_SIZE        (128*1024)
  50 #define TOTAL_SIZE      (8 * BUF_SIZE)
  51
  52 static void
  53 doit(const char *filename)
  54 {
  55     size_t sz = BUF_SIZE;
  56     size_t nbytes = TOTAL_SIZE;
  57     char *buf = malloc(sz);
  58     off_t offset = 0;
  59     int fd, ret;
  60
  61     if (!buf)
  62         errx(1, "malloc failed");
  63
  64     memset(buf, 0, BUF_SIZE);
  65
  66     fd = open(filename, O_RDWR | O_TRUNC | O_CREAT, 0666);
  67     if (fd < 0)
  68         err(1, "open %s", filename);
  69
  70     while (offset < nbytes) {
  71         ret = write(fd, buf, sz);
  72         if (ret != sz)
  73             err(1, "write at %llu", (unsigned long long)offset);
  74         offset += sz;
  75         (void)sleep(1);
  76     }
  77
  78     (void)close(fd);
  79
  80     free(buf);
  81 }
  82
  83 int
  84 main(int argc, char **argv)
  85 {
  86     setprogname(argv[0]);
  87
  88     if (argc == 1)
  89         doit("foo");
  90     else if (argc == 2)
  91         doit(argv[1]);
  92     else
  93         errx(1, "usage: %s [filename]", argv[0]);
  94     return 0;
  95 }