projects / thirdparty / bash.git / blame
| Commit | Line | Data |
|---|---|---|
| ccc6cda3 JA |
1 | /* sig.h -- header file for signal handler definitions. */ |
| 2 | ||
| 3 | /* Copyright (C) 1994 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. */ |
| ccc6cda3 JA |
20 | |
| 21 | /* Make sure that this is included *after* config.h! */ | |
| 22 | ||
| 23 | #if !defined (_SIG_H_) | |
| 24 | # define _SIG_H_ | |
| 25 | ||
| 26 | #include "stdc.h" | |
| 27 | ||
| 28 | #if !defined (SIGABRT) && defined (SIGIOT) | |
| 29 | # define SIGABRT SIGIOT | |
| 30 | #endif | |
| 31 | ||
| 32 | #define sighandler RETSIGTYPE | |
| 33 | typedef RETSIGTYPE SigHandler (); | |
| 34 | ||
| 35 | #if defined (VOID_SIGHANDLER) | |
| 36 | # define SIGRETURN(n) return | |
| 37 | #else | |
| 38 | # define SIGRETURN(n) return(n) | |
| 39 | #endif /* !VOID_SIGHANDLER */ | |
| 40 | ||
| 41 | /* Here is a definition for set_signal_handler () which simply expands to | |
| 42 | a call to signal () for non-Posix systems. The code for set_signal_handler | |
| 43 | in the Posix case resides in general.c. */ | |
| 44 | #if !defined (HAVE_POSIX_SIGNALS) | |
| 45 | # define set_signal_handler(sig, handler) (SigHandler *)signal (sig, handler) | |
| 46 | #else | |
| 47 | extern SigHandler *set_signal_handler (); /* in sig.c */ | |
| 48 | #endif /* _POSIX_VERSION */ | |
| 49 | ||
| 50 | /* Definitions used by the job control code. */ | |
| 51 | #if defined (JOB_CONTROL) | |
| 52 | ||
| 53 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
| 54 | # define SIGCHLD SIGCLD | |
| 55 | #endif | |
| 56 | ||
| 57 | #if !defined (HAVE_POSIX_SIGNALS) && !defined (sigmask) | |
| 58 | # define sigmask(x) (1 << ((x)-1)) | |
| 59 | #endif /* !HAVE_POSIX_SIGNALS && !sigmask */ | |
| 60 | ||
| 61 | #if !defined (HAVE_POSIX_SIGNALS) | |
| 62 | # if !defined (SIG_BLOCK) | |
| 63 | # define SIG_BLOCK 2 | |
| 64 | # define SIG_SETMASK 3 | |
| 65 | # endif /* SIG_BLOCK */ | |
| 66 | ||
| 67 | /* sigset_t defined in config.h */ | |
| 68 | ||
| 69 | /* Make sure there is nothing inside the signal set. */ | |
| 70 | # define sigemptyset(set) (*(set) = 0) | |
| 71 | ||
| 72 | /* Initialize the signal set to hold all signals. */ | |
| 73 | # define sigfillset(set) (*set) = sigmask (NSIG) - 1 | |
| 74 | ||
| 75 | /* Add SIG to the contents of SET. */ | |
| 76 | # define sigaddset(set, sig) *(set) |= sigmask (sig) | |
| 77 | ||
| 78 | /* Delete SIG from signal set SET. */ | |
| 79 | # define sigdelset(set, sig) *(set) &= ~sigmask (sig) | |
| 80 | ||
| 81 | /* Is SIG a member of the signal set SET? */ | |
| 82 | # define sigismember(set, sig) ((*(set) & sigmask (sig)) != 0) | |
| 83 | ||
| 84 | /* Suspend the process until the reception of one of the signals | |
| 85 | not present in SET. */ | |
| 86 | # define sigsuspend(set) sigpause (*(set)) | |
| 87 | #endif /* !HAVE_POSIX_SIGNALS */ | |
| 88 | ||
| 89 | /* These definitions are used both in POSIX and non-POSIX implementations. */ | |
| 90 | ||
| 91 | #define BLOCK_SIGNAL(sig, nvar, ovar) \ | |
| 92 | sigemptyset (&nvar); \ | |
| 93 | sigaddset (&nvar, sig); \ | |
| 94 | sigemptyset (&ovar); \ | |
| 95 | sigprocmask (SIG_BLOCK, &nvar, &ovar) | |
| 96 | ||
| 97 | #if defined (HAVE_POSIX_SIGNALS) | |
| 98 | # define BLOCK_CHILD(nvar, ovar) \ | |
| 99 | BLOCK_SIGNAL (SIGCHLD, nvar, ovar) | |
| 100 | # define UNBLOCK_CHILD(ovar) \ | |
| 101 | sigprocmask (SIG_SETMASK, &ovar, (sigset_t *) NULL) | |
| 102 | #else /* !HAVE_POSIX_SIGNALS */ | |
| 103 | # define BLOCK_CHILD(nvar, ovar) ovar = sigblock (sigmask (SIGCHLD)) | |
| 104 | # define UNBLOCK_CHILD(ovar) sigsetmask (ovar) | |
| 105 | #endif /* !HAVE_POSIX_SIGNALS */ | |
| 106 | ||
| 107 | #endif /* JOB_CONTROL */ | |
| 108 | ||
| 109 | /* Functions from sig.c. */ | |
| 110 | extern sighandler termination_unwind_protect __P((int)); | |
| 111 | extern sighandler sigint_sighandler __P((int)); | |
| 112 | extern void initialize_signals __P((void)); | |
| 113 | extern void reinitialize_signals __P((void)); | |
| d166f048 | 114 | extern void initialize_terminating_signals __P((void)); |
| ccc6cda3 JA |
115 | extern void reset_terminating_signals __P((void)); |
| 116 | extern void throw_to_top_level __P((void)); | |
| f73dda09 | 117 | extern void jump_to_top_level __P((int)) __attribute__((__noreturn__)); |
| ccc6cda3 JA |
118 | |
| 119 | /* Functions defined in trap.c. */ | |
| 120 | extern SigHandler *set_sigint_handler __P((void)); | |
| e8ce775d JA |
121 | extern SigHandler *trap_to_sighandler __P((int)); |
| 122 | extern sighandler trap_handler __P((int)); | |
| ccc6cda3 JA |
123 | |
| 124 | #endif /* _SIG_H_ */ |