137 lines
4.3 KiB
C
137 lines
4.3 KiB
C
/* sig.h -- header file for signal handler definitions. */
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/* Copyright (C) 1994-2009 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Make sure that this is included *after* config.h! */
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#if !defined (_SIG_H_)
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# define _SIG_H_
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#include "stdc.h"
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#if !defined (SIGABRT) && defined (SIGIOT)
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# define SIGABRT SIGIOT
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#endif
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#define sighandler RETSIGTYPE
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typedef RETSIGTYPE SigHandler __P((int));
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#if defined (VOID_SIGHANDLER)
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# define SIGRETURN(n) return
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#else
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# define SIGRETURN(n) return(n)
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#endif /* !VOID_SIGHANDLER */
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/* Here is a definition for set_signal_handler () which simply expands to
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a call to signal () for non-Posix systems. The code for set_signal_handler
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in the Posix case resides in general.c. */
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#if !defined (HAVE_POSIX_SIGNALS)
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# define set_signal_handler(sig, handler) (SigHandler *)signal (sig, handler)
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#else
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extern SigHandler *set_signal_handler __P((int, SigHandler *)); /* in sig.c */
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#endif /* _POSIX_VERSION */
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/* Definitions used by the job control code. */
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#if defined (JOB_CONTROL)
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#if !defined (SIGCHLD) && defined (SIGCLD)
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# define SIGCHLD SIGCLD
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#endif
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#if !defined (HAVE_POSIX_SIGNALS) && !defined (sigmask)
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# define sigmask(x) (1 << ((x)-1))
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#endif /* !HAVE_POSIX_SIGNALS && !sigmask */
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#if !defined (HAVE_POSIX_SIGNALS)
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# if !defined (SIG_BLOCK)
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# define SIG_BLOCK 2
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# define SIG_SETMASK 3
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# endif /* SIG_BLOCK */
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/* sigset_t defined in config.h */
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/* Make sure there is nothing inside the signal set. */
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# define sigemptyset(set) (*(set) = 0)
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/* Initialize the signal set to hold all signals. */
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# define sigfillset(set) (*set) = sigmask (NSIG) - 1
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/* Add SIG to the contents of SET. */
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# define sigaddset(set, sig) *(set) |= sigmask (sig)
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/* Delete SIG from signal set SET. */
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# define sigdelset(set, sig) *(set) &= ~sigmask (sig)
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/* Is SIG a member of the signal set SET? */
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# define sigismember(set, sig) ((*(set) & sigmask (sig)) != 0)
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/* Suspend the process until the reception of one of the signals
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not present in SET. */
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# define sigsuspend(set) sigpause (*(set))
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#endif /* !HAVE_POSIX_SIGNALS */
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/* These definitions are used both in POSIX and non-POSIX implementations. */
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#define BLOCK_SIGNAL(sig, nvar, ovar) \
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do { \
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sigemptyset (&nvar); \
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sigaddset (&nvar, sig); \
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sigemptyset (&ovar); \
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sigprocmask (SIG_BLOCK, &nvar, &ovar); \
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} while (0)
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#if defined (HAVE_POSIX_SIGNALS)
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# define BLOCK_CHILD(nvar, ovar) \
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BLOCK_SIGNAL (SIGCHLD, nvar, ovar)
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# define UNBLOCK_CHILD(ovar) \
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sigprocmask (SIG_SETMASK, &ovar, (sigset_t *) NULL)
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#else /* !HAVE_POSIX_SIGNALS */
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# define BLOCK_CHILD(nvar, ovar) ovar = sigblock (sigmask (SIGCHLD))
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# define UNBLOCK_CHILD(ovar) sigsetmask (ovar)
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#endif /* !HAVE_POSIX_SIGNALS */
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#endif /* JOB_CONTROL */
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/* Extern variables */
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extern volatile int sigwinch_received;
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extern int interrupt_immediately;
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extern int terminate_immediately;
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/* Functions from sig.c. */
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extern sighandler termsig_sighandler __P((int));
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extern void termsig_handler __P((int));
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extern sighandler sigint_sighandler __P((int));
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extern void initialize_signals __P((int));
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extern void initialize_terminating_signals __P((void));
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extern void reset_terminating_signals __P((void));
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extern void top_level_cleanup __P((void));
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extern void throw_to_top_level __P((void));
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extern void jump_to_top_level __P((int)) __attribute__((__noreturn__));
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extern sighandler sigwinch_sighandler __P((int));
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extern void set_sigwinch_handler __P((void));
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extern void unset_sigwinch_handler __P((void));
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/* Functions defined in trap.c. */
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extern SigHandler *set_sigint_handler __P((void));
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extern SigHandler *trap_to_sighandler __P((int));
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extern sighandler trap_handler __P((int));
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#endif /* _SIG_H_ */
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