diff options
Diffstat (limited to 'signal/signal.h')
| -rw-r--r-- | signal/signal.h | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/signal/signal.h b/signal/signal.h index 26212cba5a..7b3c26094c 100644 --- a/signal/signal.h +++ b/signal/signal.h @@ -29,9 +29,6 @@ __BEGIN_DECLS -#define __need_size_t -#include <stddef.h> - #include <gnu/types.h> #include <sigset.h> /* __sigset_t, __sig_atomic_t. */ @@ -90,16 +87,31 @@ extern int __sigblock __P ((int __mask)); /* Set the mask of blocked signals to MASK, returning the old mask. */ extern int __sigsetmask __P ((int __mask)); + +/* The `sigpause' function has two different interfaces. The original + BSD definition defines the argument as a mask of the signal, while + the more modern interface in X/Open defines it as the signal + number. We go with the more modern version unless the user + explitcly selects the BSD version. */ +extern int __sigpause __P ((int __sig_or_mask, int __is_sig)); + +#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. */ -extern int __sigpause __P ((int __mask)); +#define sigpause(mask) __sigpause ((mask), 0) +#else +#ifdef __USE_XOPEN +/* Remove a signal from the signal mask and suspend the process. */ +#define sigpause(sig) __sigpause ((sig), 1) +#endif +#endif + #ifdef __USE_BSD #define sigmask(sig) __sigmask(sig) extern int sigblock __P ((int __mask)); extern int sigsetmask __P ((int __mask)); -extern int sigpause __P ((int __mask)); /* This function is here only for compatibility. Use `sigprocmask' instead. */ @@ -147,7 +159,7 @@ extern int sigaddset __P ((sigset_t *__set, int __signo)); extern int sigdelset __P ((sigset_t *__set, int __signo)); /* Return 1 if SIGNO is in SET, 0 if not. */ -extern int sigismember __P ((__const sigset_t *__set, int signo)); +extern int sigismember __P ((__const sigset_t *__set, int __signo)); /* Get the system-specific definitions of `struct sigaction' and the `SA_*' and `SIG_*'. constants. */ @@ -184,7 +196,7 @@ extern int sigwait __P ((__const sigset_t *__set, int *__sig)); #if defined(_SIGNAL_H) && defined(__USE_BSD) -/* Names of the signals. This variable exists only for compatiblity. +/* Names of the signals. This variable exists only for compatibility. Use `strsignal' instead (see <string.h>). */ extern __const char *__const _sys_siglist[NSIG]; extern __const char *__const sys_siglist[NSIG]; @@ -228,6 +240,9 @@ extern int sigreturn __P ((struct sigcontext *__scp)); #if defined(_SIGNAL_H) && (defined(__USE_BSD) || defined(__USE_XOPEN_EXTENDED)) +#define __need_size_t +#include <stddef.h> + /* If INTERRUPT is nonzero, make signal SIG interrupt system calls (causing them to fail with EINTR); if INTERRUPT is zero, make system calls be restarted after signal SIG. */ |