Provided by: manpages-dev_2.17-1_all
sigpause - atomically release blocked signals and wait for interrupt
int sigpause(int sigmask); /* BSD */
int sigpause(int sig); /* Unix95 */
Don’t use this function. Use sigsuspend(2) instead.
The function sigpause() is designed to wait for some signal. It
changes the process’ signal mask (set of blocked signals), and then
waits for a signal to arrive. Upon arrival of a signal, the original
signal mask is restored.
If sigpause() returns, it was interrupted by a signal and the return
value is -1 with errno set to EINTR.
The classical BSD version of this function appeared in 4.2BSD. It sets
the process’ signal mask to sigmask. When the number of signals was
increased above 32, this version was replaced by the incompatible
Unix95 one, which removes only the specified signal sig from the
process’ signal mask. The unfortunate situation with two incompatible
functions with the same name was solved by the sigsuspend(2) function,
that takes a sigset_t * parameter (instead of an int).
On Linux, this routine is a system call only on the Sparc (sparc64)
architecture. Libc4 and libc5 only know about the BSD version. Glibc
uses the BSD version unless _XOPEN_SOURCE is defined.
kill(2), sigaction(2), sigblock(2), sigprocmask(2), sigsuspend(2),