pause - wait for signal
#include <unistd.h>
int pause(void);
The pause library function causes the invoking process (or thread) to
sleep until a signal is received that either terminates it or causes it
to call a signal-catching function.
The pause function only returns when a signal was caught and the signal-catching
function returned. In this case pause returns -1, and
errno is set to EINTR.
EINTR a signal was caught and the signal-catching function returned.
SVr4, SVID, POSIX, X/OPEN, BSD 4.3, SUSv2
kill(2), select(2), signal(2)
Linux 1995-08-31 PAUSE(2)
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