src/tests/write-large.c

   1 /*
   2  * Copyright (c) 2001 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 #ifndef _LARGEFILE64_SOURCE
  35 # define _LARGEFILE64_SOURCE
  36 #endif
  37
  38 #ifdef HAVE_CONFIG_H
  39 #include <config.h>
  40 #endif
  41
  42 #include <sys/types.h>
  43
  44 #include <stdio.h>
  45
  46 #include <sys/stat.h>
  47 #include <fcntl.h>
  48 #include <unistd.h>
  49
  50
  51 #include <err.h>
  52
  53 const char *fn = "foobar";
  54
  55 static void
  56 check_size(const char *fn, size_t sz, int paranoia)
  57 {
  58     struct stat sb;
  59
  60     if (paranoia)
  61         return;
  62
  63     if (stat(fn, &sb) < 0)
  64         err(1, "stat");
  65     if (sb.st_size != sz)
  66         errx(1, "st_size mismatch %d != %d", (int)sb.st_size, (int)sz);
  67 }
  68
  69 int
  70 main(int argc, char **argv)
  71 {
  72     int fd, cnt, ret;
  73     int buf[1024];
  74
  75 #ifdef O_LARGEFILE
  76     fd = open(fn, O_RDWR | O_CREAT | O_TRUNC | O_LARGEFILE, 0644);
  77 #else
  78     fd = open(fn, O_RDWR | O_CREAT | O_TRUNC, 0644);
  79 #endif
  80     if (fd < 0)
  81         err(1, "open1");
  82     cnt = 0;
  83     while (cnt < 2097151) {
  84         ret = write(fd, buf, 1024);
  85         if (ret != 1024)
  86             errx(1, "write1 %d %d", cnt, ret);
  87         cnt++;
  88     }
  89     ret = write(fd, buf, 1024);
  90     if (ret != 1023)
  91         errx(1, "write1 last %d", ret);
  92     if (close(fd) < 0)
  93         err(1, "close1");
  94
  95     check_size(fn, 2147483647, 0);
  96
  97     return 0;
  98 }