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Date: Thu, 8 Oct 2009 00:10:11 -0300
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Subject: SIGINT default behavior
From: Pedro Izecksohn <pedro DOT izecksohn AT gmail DOT com>
To: cygwin AT cygwin DOT com
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root AT turion ~/programming/c/sigint
$ cat test.c
#include <stdio.h>
#include <stdlib.h>

int main ()
{
  printf ("Press Control c\n");
  char buffer [3];
  char *fgets_returned = fgets (buffer, sizeof buffer, stdin);
  if (!fgets_returned)
  {
    if (ferror (stdin))
    {
      perror ("ferror (stdin)");
      return EXIT_FAILURE;
    }
    if (feof (stdin)) printf ("EOF\n");
    return EXIT_SUCCESS;
  }
  printf ("You did not press Control c .\n");
  return EXIT_SUCCESS;
}

root AT turion ~/programming/c/sigint
$ gcc -Wall test.c -o test_cygwin.exe

root AT turion ~/programming/c/sigint
$ ./test_cygwin.exe
Press Control c
ferror (stdin)

root AT turion ~/programming/c/sigint
$ cat /proc/version
CYGWIN_NT-6.0 1.5.25(0.156/4/2) 2008-06-12 19:34

  The default behavior is not always the same. I also got:
ferror (stdin):
  and
ferror (stdin): Interrupted system call
  and the expected behavior of just the exit code 130.

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