projects / thirdparty / bash.git / blame
| Commit | Line | Data |
|---|---|---|
| 726f6388 JA |
1 | /* quit.h -- How to handle SIGINT gracefully. */ |
| 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 | |
| bb70624e | 19 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
| 726f6388 | 20 | |
| ccc6cda3 JA |
21 | #if !defined (_QUIT_H_) |
| 22 | #define _QUIT_H_ | |
| 726f6388 JA |
23 | |
| 24 | /* Non-zero means SIGINT has already ocurred. */ | |
| 0628567a JA |
25 | extern volatile int interrupt_state; |
| 26 | extern volatile int terminating_signal; | |
| 27 | ||
| 28 | /* Macro to call a great deal. SIGINT just sets the interrupt_state variable. | |
| 29 | When it is safe, put QUIT in the code, and the "interrupt" will take | |
| 30 | place. The same scheme is used for terminating signals (e.g., SIGHUP) | |
| 31 | and the terminating_signal variable. That calls a function which will | |
| 32 | end up exiting the shell. */ | |
| 33 | #define QUIT \ | |
| 34 | do { \ | |
| 35 | if (terminating_signal) termsig_handler (terminating_signal); \ | |
| 36 | if (interrupt_state) throw_to_top_level (); \ | |
| 37 | } while (0) | |
| 726f6388 | 38 | |
| ccc6cda3 JA |
39 | #define SETINTERRUPT interrupt_state = 1 |
| 40 | #define CLRINTERRUPT interrupt_state = 0 | |
| 41 | ||
| 42 | #define ADDINTERRUPT interrupt_state++ | |
| 43 | #define DELINTERRUPT interrupt_state-- | |
| 44 | ||
| 0628567a JA |
45 | /* The same sort of thing, this time just for signals that would ordinarily |
| 46 | cause the shell to terminate. */ | |
| 47 | ||
| 48 | #define CHECK_TERMSIG \ | |
| 49 | do { \ | |
| 50 | if (terminating_signal) termsig_handler (terminating_signal); \ | |
| 51 | } while (0) | |
| 52 | ||
| ccc6cda3 | 53 | #endif /* _QUIT_H_ */ |