| /* sig.h -- header file for signal handler definitions. */ |
| |
| /* Copyright (C) 1994-2009 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* Make sure that this is included *after* config.h! */ |
| |
| #if !defined (_SIG_H_) |
| # define _SIG_H_ |
| |
| #include "stdc.h" |
| |
| #if !defined (SIGABRT) && defined (SIGIOT) |
| # define SIGABRT SIGIOT |
| #endif |
| |
| #define sighandler RETSIGTYPE |
| typedef RETSIGTYPE SigHandler __P((int)); |
| |
| #if defined (VOID_SIGHANDLER) |
| # define SIGRETURN(n) return |
| #else |
| # define SIGRETURN(n) return(n) |
| #endif /* !VOID_SIGHANDLER */ |
| |
| /* Here is a definition for set_signal_handler () which simply expands to |
| a call to signal () for non-Posix systems. The code for set_signal_handler |
| in the Posix case resides in general.c. */ |
| #if !defined (HAVE_POSIX_SIGNALS) |
| # define set_signal_handler(sig, handler) (SigHandler *)signal (sig, handler) |
| #else |
| extern SigHandler *set_signal_handler __P((int, SigHandler *)); /* in sig.c */ |
| #endif /* _POSIX_VERSION */ |
| |
| /* Definitions used by the job control code. */ |
| #if defined (JOB_CONTROL) |
| |
| #if !defined (SIGCHLD) && defined (SIGCLD) |
| # define SIGCHLD SIGCLD |
| #endif |
| |
| #if !defined (HAVE_POSIX_SIGNALS) && !defined (sigmask) |
| # define sigmask(x) (1 << ((x)-1)) |
| #endif /* !HAVE_POSIX_SIGNALS && !sigmask */ |
| |
| #if !defined (HAVE_POSIX_SIGNALS) |
| # if !defined (SIG_BLOCK) |
| # define SIG_BLOCK 2 |
| # define SIG_SETMASK 3 |
| # endif /* SIG_BLOCK */ |
| |
| /* sigset_t defined in config.h */ |
| |
| /* Make sure there is nothing inside the signal set. */ |
| # define sigemptyset(set) (*(set) = 0) |
| |
| /* Initialize the signal set to hold all signals. */ |
| # define sigfillset(set) (*set) = sigmask (NSIG) - 1 |
| |
| /* Add SIG to the contents of SET. */ |
| # define sigaddset(set, sig) *(set) |= sigmask (sig) |
| |
| /* Delete SIG from signal set SET. */ |
| # define sigdelset(set, sig) *(set) &= ~sigmask (sig) |
| |
| /* Is SIG a member of the signal set SET? */ |
| # define sigismember(set, sig) ((*(set) & sigmask (sig)) != 0) |
| |
| /* Suspend the process until the reception of one of the signals |
| not present in SET. */ |
| # define sigsuspend(set) sigpause (*(set)) |
| #endif /* !HAVE_POSIX_SIGNALS */ |
| |
| /* These definitions are used both in POSIX and non-POSIX implementations. */ |
| |
| #define BLOCK_SIGNAL(sig, nvar, ovar) \ |
| do { \ |
| sigemptyset (&nvar); \ |
| sigaddset (&nvar, sig); \ |
| sigemptyset (&ovar); \ |
| sigprocmask (SIG_BLOCK, &nvar, &ovar); \ |
| } while (0) |
| |
| #if defined (HAVE_POSIX_SIGNALS) |
| # define BLOCK_CHILD(nvar, ovar) \ |
| BLOCK_SIGNAL (SIGCHLD, nvar, ovar) |
| # define UNBLOCK_CHILD(ovar) \ |
| sigprocmask (SIG_SETMASK, &ovar, (sigset_t *) NULL) |
| #else /* !HAVE_POSIX_SIGNALS */ |
| # define BLOCK_CHILD(nvar, ovar) ovar = sigblock (sigmask (SIGCHLD)) |
| # define UNBLOCK_CHILD(ovar) sigsetmask (ovar) |
| #endif /* !HAVE_POSIX_SIGNALS */ |
| |
| #endif /* JOB_CONTROL */ |
| |
| /* Extern variables */ |
| extern volatile int sigwinch_received; |
| |
| extern int interrupt_immediately; |
| extern int terminate_immediately; |
| |
| /* Functions from sig.c. */ |
| extern sighandler termsig_sighandler __P((int)); |
| extern void termsig_handler __P((int)); |
| extern sighandler sigint_sighandler __P((int)); |
| extern void initialize_signals __P((int)); |
| extern void initialize_terminating_signals __P((void)); |
| extern void reset_terminating_signals __P((void)); |
| extern void top_level_cleanup __P((void)); |
| extern void throw_to_top_level __P((void)); |
| extern void jump_to_top_level __P((int)) __attribute__((__noreturn__)); |
| |
| extern sighandler sigwinch_sighandler __P((int)); |
| extern void set_sigwinch_handler __P((void)); |
| extern void unset_sigwinch_handler __P((void)); |
| |
| /* Functions defined in trap.c. */ |
| extern SigHandler *set_sigint_handler __P((void)); |
| extern SigHandler *trap_to_sighandler __P((int)); |
| extern sighandler trap_handler __P((int)); |
| |
| #endif /* _SIG_H_ */ |