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/* quit.h -- How to handle SIGINT gracefully. */
/* Copyright (C) 1993 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
Bash is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with Bash; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#if !defined (_QUIT_H_)
#define _QUIT_H_
/* Non-zero means SIGINT has already ocurred. */
extern volatile int interrupt_state;
extern volatile int terminating_signal;
/* Macro to call a great deal. SIGINT just sets the interrupt_state variable.
When it is safe, put QUIT in the code, and the "interrupt" will take
place. The same scheme is used for terminating signals (e.g., SIGHUP)
and the terminating_signal variable. That calls a function which will
end up exiting the shell. */
#define QUIT \
do { \
if (terminating_signal) termsig_handler (terminating_signal); \
if (interrupt_state) throw_to_top_level (); \
} while (0)
#define SETINTERRUPT interrupt_state = 1
#define CLRINTERRUPT interrupt_state = 0
#define ADDINTERRUPT interrupt_state++
#define DELINTERRUPT interrupt_state--
/* The same sort of thing, this time just for signals that would ordinarily
cause the shell to terminate. */
#define CHECK_TERMSIG \
do { \
if (terminating_signal) termsig_handler (terminating_signal); \
} while (0)
#endif /* _QUIT_H_ */
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