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Manual page for SIGSUSPEND(2P)

sigsuspend - (POSIX only) suspend the process until delivery of a specified signal.

SYNOPSIS

#include <signal.h>


sigsuspend(const sigset_t *sigmask);

DESCRIPTION

The information in this specification applies only to POSIX applications.

The sigsuspend function replaces the signal mask of the process with the set of signals pointed to by the argument sigmask and then suspends the process until delivery of a signal whose action is either to execute a signal-catching function or to terminate the process.

If the action is to terminate the process, sigsuspend does not return. If the action is to execute a signal-catching function, sigsuspend returns after the signal-catching function returns, with the signal mask restored to the set that existed prior to the sigsuspend call.

RETURN VALUE

Since sigsuspend suspends process execution indefinitely, there is no successful completion return value. A value of -1 is returned and errno is set to indicate the error.

ERRORS

[EINTR]
A signal is caught by the calling process, and control is returned from the signal-catching function.

SEE ALSO

pause(3), sigaction(2P), sigpending(2P), sigprocmask(2P), sigsetops(3)

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