Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

sigsuspend(2) [opensolaris man page]

sigsuspend(2)							   System Calls 						     sigsuspend(2)

NAME
sigsuspend - install a signal mask and suspend caller until signal SYNOPSIS
#include <signal.h> int sigsuspend(const sigset_t *set); DESCRIPTION
The sigsuspend() function replaces the caller's signal mask with the set of signals pointed to by the set argument and suspends the caller until delivery of a signal whose action is either to execute a signal catching function or to terminate the process. If the set argument points to an invalid address, the behavior is undefined and errno may be set to EFAULT. If the action is to terminate the process, sigsuspend() does not return. If the action is to execute a signal catching function, sigsus- pend() returns after the signal catching function returns. On return, the signal mask is restored to the set that existed before the call to sigsuspend(). It is not possible to block signals that cannot be ignored (see signal.h(3HEAD)). This restriction is silently imposed by the system. RETURN VALUES
Since sigsuspend() suspends the caller's execution indefinitely, there is no successful completion return value. On failure, it returns -1 and sets errno to indicate the error. ERRORS
The sigsuspend() function will fail if: EINTR A signal was caught by the caller and control was returned from the signal catching function. The sigsuspend() function may fail if: EFAULT The set argument points to an illegal address. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO
sigaction(2), sigprocmask(2), sigwait(2), signal(3C), signal.h(3HEAD), sigsetops(3C), attributes(5) NOTES
If the caller specifies more than one unblocked signal in the mask to sigsuspend(), more than one signal might be processed before the call to sigsuspend() returns. While the caller is executing the signal handler that interrupted its call to sigsuspend(), its signal mask is the one passed to sigsus- pend(), modified as usual by the signal mask specification in the signal's sigaction(2) parameters. The caller's signal mask is not restored to its previous value until the caller returns from all the signal handlers that interrupted sigsuspend(). SunOS 5.11 24 Jun 2001 sigsuspend(2)

Check Out this Related Man Page

SIGSUSPEND(2)						     Linux Programmer's Manual						     SIGSUSPEND(2)

NAME
sigsuspend - wait for a signal SYNOPSIS
#include <signal.h> int sigsuspend(const sigset_t *mask); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): sigsuspend(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE DESCRIPTION
sigsuspend() temporarily replaces the signal mask of the calling process with the mask given by mask and then suspends the process until delivery of a signal whose action is to invoke a signal handler or to terminate a process. If the signal terminates the process, then sigsuspend() does not return. If the signal is caught, then sigsuspend() returns after the sig- nal handler returns, and the signal mask is restored to the state before the call to sigsuspend(). It is not possible to block SIGKILL or SIGSTOP; specifying these signals in mask, has no effect on the process's signal mask. RETURN VALUE
sigsuspend() always returns -1, with errno set to inndicate the error (normally, EINTR). ERRORS
EFAULT mask points to memory which is not a valid part of the process address space. EINTR The call was interrupted by a signal. CONFORMING TO
POSIX.1-2001. NOTES
Normally, sigsuspend() is used in conjunction with sigprocmask(2) in order to prevent delivery of a signal during the execution of a criti- cal code section. The caller first blocks the signals with sigprocmask(2). When the critical code has completed, the caller then waits for the signals by calling sigsuspend() with the signal mask that was returned by sigprocmask(2) (in the oldset argument). See sigsetops(3) for details on manipulating signal sets. SEE ALSO
kill(2), pause(2), sigaction(2), signal(2), sigprocmask(2), sigwaitinfo(2), sigsetops(3), sigwait(3), signal(7) COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2013-04-19 SIGSUSPEND(2)
Man Page