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Diffstat (limited to 'sig.h')
| -rw-r--r-- | sig.h | 121 |
1 files changed, 121 insertions, 0 deletions
@@ -0,0 +1,121 @@ +/* sig.h -- header file for signal handler definitions. */ + +/* Copyright (C) 1994 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* 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 (); + +#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 (); /* 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) \ + sigemptyset (&nvar); \ + sigaddset (&nvar, sig); \ + sigemptyset (&ovar); \ + sigprocmask (SIG_BLOCK, &nvar, &ovar) + +#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 */ + +/* Functions from sig.c. */ +extern sighandler termination_unwind_protect __P((int)); +extern sighandler sigint_sighandler __P((int)); +extern void initialize_signals __P((void)); +extern void reinitialize_signals __P((void)); +extern void reset_terminating_signals __P((void)); +extern void throw_to_top_level __P((void)); +extern void jump_to_top_level __P((int)); + +/* Functions defined in trap.c. */ +extern SigHandler *set_sigint_handler __P((void)); + +#endif /* _SIG_H_ */ |