stdio-common/bug4.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <string.h>
   4
   5 int stdio_block_read = 1, stdio_block_write = 1;
   6
   7 int
   8 main (int argc, char *argv[])
   9 {
  10   FILE *f;
  11   int i;
  12   char buffer[31];
  13   const char filename[] = "/tmp/bug4.test";
  14
  15   while ((i = getopt (argc, argv, "rw")) != -1)
  16     switch (i)
  17       {
  18       case 'r':
  19         stdio_block_read = 0;
  20         break;
  21       case 'w':
  22         stdio_block_write = 0;
  23         break;
  24       }
  25
  26   f = fopen (filename, "w+");
  27   for (i = 0; i < 9000; ++i)
  28     putc('x', f);
  29
  30   fseek (f, 8180L, 0);
  31   fwrite ("Where does this text come from?", 1, 31, f);
  32   fseek (f, 8180L, 0);
  33   fread (buffer, 1, 31, f);
  34   fwrite (buffer, 1, 31, stdout);
  35   fclose (f);
  36   remove (filename);
  37
  38   if (!memcmp (buffer, "Where does this text come from?", 31))
  39     {
  40       puts ("\nTest succeeded.");
  41       return 0;
  42     }
  43   else
  44     {
  45       puts ("\nTest FAILED!");
  46       return 1;
  47     }
  48 }