diff options
Diffstat (limited to 'signal/signal.h')
| -rw-r--r-- | signal/signal.h | 54 |
1 files changed, 33 insertions, 21 deletions
diff --git a/signal/signal.h b/signal/signal.h index 7b3c26094c..66ab3dd09a 100644 --- a/signal/signal.h +++ b/signal/signal.h @@ -22,7 +22,7 @@ #ifndef _SIGNAL_H -#if !defined(__need_sig_atomic_t) && !defined(__need_sigset_t) +#if !defined __need_sig_atomic_t && !defined __need_sigset_t #define _SIGNAL_H 1 #include <features.h> #endif @@ -32,15 +32,15 @@ __BEGIN_DECLS #include <gnu/types.h> #include <sigset.h> /* __sigset_t, __sig_atomic_t. */ -#if !defined(__sig_atomic_t_defined) && \ - (defined(_SIGNAL_H) || defined(__need_sig_atomic_t)) +#if !defined __sig_atomic_t_defined \ + && (defined _SIGNAL_H || defined __need_sig_atomic_t) /* An integral type that can be modified atomically, without the possibility of a signal arriving in the middle of the operation. */ typedef __sig_atomic_t sig_atomic_t; #endif /* `sig_atomic_t' undefined and <signal.h> or need `sig_atomic_t'. */ -#undef __need_sig_atomic_t +#undef __need_sig_atomic_t -#ifdef _SIGNAL_H +#ifdef _SIGNAL_H #include <signum.h> @@ -51,15 +51,27 @@ typedef void (*__sighandler_t) __P ((int)); returning the old handler, or SIG_ERR on error. */ extern __sighandler_t signal __P ((int __sig, __sighandler_t __handler)); +#if defined __FAVOR_BSD || defined __USE_XOPEN +/* The X/Open definition of `signal' conflicts with the BSD version. + So they defined another function `bsd_signal'. We will use this + implementation as the official `signal' function if the BSD + interface is preferred. */ +extern __sighandler_t bsd_signal __P ((int __sig, __sighandler_t __handler)); + +#ifdef __FAVOR_BSD +#define signal(sig, handler) bsd_signal ((sig), (handler)) +#endif +#endif + /* Send signal SIG to process number PID. If PID is zero, send SIG to all processes in the current process's process group. If PID is < -1, send SIG to all processes in process group - PID. */ extern int __kill __P ((__pid_t __pid, int __sig)); -#ifdef __USE_POSIX +#ifdef __USE_POSIX extern int kill __P ((__pid_t __pid, int __sig)); #endif /* Use POSIX. */ -#if defined(__USE_BSD) || defined(__USE_XOPEN_EXTENDED) +#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED /* Send SIG to all processes in process group PGRP. If PGRP is zero, send SIG to all processes in the current process's process group. */ @@ -69,13 +81,13 @@ extern int killpg __P ((__pid_t __pgrp, int __sig)); /* Raise signal SIG, i.e., send SIG to yourself. */ extern int raise __P ((int __sig)); -#ifdef __USE_SVID +#ifdef __USE_SVID /* SVID names for the same things. */ extern __sighandler_t ssignal __P ((int __sig, __sighandler_t __handler)); extern int gsignal __P ((int __sig)); #endif /* Use SVID. */ -#ifdef __USE_MISC +#ifdef __USE_MISC /* Print a message describing the meaning of the given signal number. */ extern void psignal __P ((int __sig, __const char *__s)); #endif /* Use misc. */ @@ -95,7 +107,7 @@ extern int __sigsetmask __P ((int __mask)); explitcly selects the BSD version. */ extern int __sigpause __P ((int __sig_or_mask, int __is_sig)); -#if defined(__USE_BSD) && !defined(__USE_XOPEN) +#if defined __USE_BSD && !defined __USE_XOPEN /* Set the mask of blocked signals to MASK, wait for a signal to arrive, and then restore the mask. */ #define sigpause(mask) __sigpause ((mask), 0) @@ -107,7 +119,7 @@ extern int __sigpause __P ((int __sig_or_mask, int __is_sig)); #endif -#ifdef __USE_BSD +#ifdef __USE_BSD #define sigmask(sig) __sigmask(sig) extern int sigblock __P ((int __mask)); @@ -119,32 +131,32 @@ extern int siggetmask __P ((void)); #endif /* Use BSD. */ -#ifdef __USE_MISC +#ifdef __USE_MISC #define NSIG _NSIG #endif -#ifdef __USE_GNU +#ifdef __USE_GNU typedef __sighandler_t sighandler_t; #endif /* 4.4 BSD uses the name `sig_t' for this. */ -#ifdef __USE_BSD +#ifdef __USE_BSD typedef __sighandler_t sig_t; #endif #endif /* <signal.h> included. */ -#ifdef __USE_POSIX +#ifdef __USE_POSIX -#if !defined(__sigset_t_defined) && \ - (defined(_SIGNAL_H) || defined(__need_sigset_t)) +#if !defined __sigset_t_defined \ + && (defined _SIGNAL_H || defined __need_sigset_t) typedef __sigset_t sigset_t; #define __sigset_t_defined 1 #endif /* `sigset_t' not defined and <signal.h> or need `sigset_t'. */ -#undef __need_sigset_t +#undef __need_sigset_t -#ifdef _SIGNAL_H +#ifdef _SIGNAL_H /* Clear all signals from SET. */ extern int sigemptyset __P ((sigset_t *__set)); @@ -194,7 +206,7 @@ extern int sigwait __P ((__const sigset_t *__set, int *__sig)); #endif /* Use POSIX. */ -#if defined(_SIGNAL_H) && defined(__USE_BSD) +#if defined _SIGNAL_H && defined __USE_BSD /* Names of the signals. This variable exists only for compatibility. Use `strsignal' instead (see <string.h>). */ @@ -238,7 +250,7 @@ extern int sigreturn __P ((struct sigcontext *__scp)); #endif /* signal.h included and use BSD. */ -#if defined(_SIGNAL_H) && (defined(__USE_BSD) || defined(__USE_XOPEN_EXTENDED)) +#if defined _SIGNAL_H && (defined __USE_BSD || defined __USE_XOPEN_EXTENDED) #define __need_size_t #include <stddef.h> |