/* 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_ */