trap.h

   1 /* trap.h -- data structures used in the trap mechanism. */
   2
   3 /* Copyright (C) 1993 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bash, the Bourne Again SHell.
   6
   7    Bash is free software; you can redistribute it and/or modify it under
   8    the terms of the GNU General Public License as published by the Free
   9    Software Foundation; either version 2, or (at your option) any later
  10    version.
  11
  12    Bash is distributed in the hope that it will be useful, but WITHOUT ANY
  13    WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15    for more details.
  16
  17    You should have received a copy of the GNU General Public License along
  18    with Bash; see the file COPYING.  If not, write to the Free Software
  19    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 #if !defined (_TRAP_H_)
  22 #define _TRAP_H_
  23
  24 #include "stdc.h"
  25
  26 #if !defined (SIG_DFL)
  27 #include "bashtypes.h"
  28 #include <signal.h>
  29 #endif /* SIG_DFL */
  30
  31 #if !defined (NSIG)
  32 #define NSIG 64
  33 #endif /* !NSIG */
  34
  35 #define NO_SIG -1
  36 #define DEFAULT_SIG SIG_DFL
  37 #define IGNORE_SIG  SIG_IGN
  38
  39 /* Special shell trap names. */
  40 #define DEBUG_TRAP NSIG
  41 #define EXIT_TRAP 0
  42
  43 #define signal_object_p(x) (decode_signal (x) != NO_SIG)
  44
  45 extern char *trap_list[];
  46
  47 /* Externally-visible functions declared in trap.c. */
  48 extern void initialize_traps __P((void));
  49 extern void run_pending_traps __P((void));
  50 extern void maybe_set_sigchld_trap __P((char *));
  51 extern void set_sigchld_trap __P((char *));
  52 extern void set_debug_trap __P((char *));
  53 extern void set_sigint_trap __P((char *));
  54 extern void set_signal __P((int, char *));
  55 extern void restore_default_signal __P((int));
  56 extern void ignore_signal __P((int));
  57 extern int run_exit_trap __P((void));
  58 extern void run_trap_cleanup __P((int));
  59 extern void run_debug_trap __P((void));
  60 extern void free_trap_strings __P((void));
  61 extern void reset_signal_handlers __P((void));
  62 extern void restore_original_signals __P((void));
  63
  64 extern char *signal_name __P((int));
  65
  66 extern int decode_signal __P((char *));
  67 extern void run_interrupt_trap __P((void));
  68 extern int maybe_call_trap_handler __P((int));
  69 extern int signal_is_trapped __P((int));
  70 extern int signal_is_ignored __P((int));
  71 extern int signal_is_special __P((int));
  72 extern void set_signal_ignored __P((int));
  73
  74 #endif /* _TRAP_H_ */