compiler/clib/signal.c

   1 /*
   2     Copyright © 2004-2012, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include "__signal.h"
   7
   8 /*****************************************************************************
   9
  10     NAME */
  11
  12 #include <signal.h>
  13
  14         __sighandler_t *signal(
  15
  16 /*  SYNOPSIS */
  17         int signum,
  18         __sighandler_t *handler)
  19
  20 /*  FUNCTION
  21         Set signal handler for a signal.
  22
  23     INPUTS
  24         signum - the signal number to register a handler for
  25         handler - the signal handler; can be SIG_IGN, SIG_DFL or a function
  26                   pointer that will handle the signal
  27
  28     RESULT
  29         The old handler that was replaced by the new handler.
  30
  31     NOTES
  32         Implemented but no interrupts will be generated like when pressing
  33         Ctrl-C; signal handlers can for now only be called by raise() in the
  34         program itself.
  35
  36     EXAMPLE
  37
  38     BUGS
  39
  40     SEE ALSO
  41
  42     INTERNALS
  43
  44 ******************************************************************************/
  45 {
  46     struct signal_func_data *sigfuncdata = __sig_getfuncdata(signum);
  47
  48     if (!sigfuncdata)
  49         return SIG_ERR;
  50
  51     __sighandler_t *ret = sigfuncdata->sigfunc;
  52     sigfuncdata->sigfunc = handler;
  53
  54     return ret;
  55 }
  56