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This page displays the COHERENT manpage for sigsuspend() [Install a signal mask and suspend process].
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sigsuspend() -- System Call (libc) Install a signal mask and suspend process #include <signal.h> int sigsuspend(set) const sigset_t *set; sigsuspend() replaces the process's signal mask with the set of signals to which set points, then suspends the current process until it receives a signal that either terminates the process or invokes a signal-handling function. If the received signal terminates the process, sigsuspend() does not return. If, however, the received signal invokes a signal-handling function, sigsuspend() restores the original signal mask. Because sigsuspend() indefinitely suspends execution of the process, there is no return value that indicates successful completion. If something goes wrong, it returns -1 and sets errno to an appropriate value. sigsuspend() fails if either of the following is true: -> The calling process catches a signal and grabs control from the signal- catching function. sigsuspend() sets errno to EINTR. -> set points outside the process's allocated address space. sigsuspend() sets errno to EFAULT. See Also libc, siglongjmp(), signal(), sigsetjmp() POSIX Standard, §3.3.7