tests/test-parallel1.c

   1 /*
   2  * Copyright (c) 1995 - 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.
  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 <sys/types.h>
  40 #include <sys/wait.h>
  41 #include <sys/param.h>
  42 #include <unistd.h>
  43
  44 #include <err.h>
  45 #include <roken.h>
  46
  47 #include <atypes.h>
  48 #include <kafs.h>
  49
  50 #ifdef RCSID
  51 RCSID("$Id$");
  52 #endif
  53
  54 #define WORKER_TIMES 100
  55 #define NUM_WORKER 10
  56
  57 static int
  58 worker (int num)
  59 {
  60     int i, fd;
  61
  62     for (i = 0 ; i < WORKER_TIMES ; i++) {
  63         fd = open ("foo", O_CREAT|O_RDWR, 0600);
  64         if (fd >= 0) {
  65             fchmod (fd, 0700);
  66             close (fd);
  67         }
  68         unlink("foo");
  69         if (i % 1000) {
  70             printf (" %d", num);
  71             fflush (stdout);
  72         }
  73     }
  74     return 0;
  75 }
  76
  77
  78 int
  79 main(int argc, char **argv)
  80 {
  81     int i, ret;
  82
  83     setprogname (argv[0]);
  84
  85     for (i = 0; i < NUM_WORKER ; i++) {
  86         int ret;
  87
  88         ret = fork();
  89         switch (ret) {
  90         case 0:
  91             return worker(i);
  92         case -1:
  93             err (1, "fork");
  94         }
  95     }
  96     i = NUM_WORKER;
  97     while (i && wait (&ret)) {
  98         i--;
  99         if (ret)
 100             err (1, "wait: %d", ret);
 101     }
 102     return 0;
 103 }