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RedHat 9 (Linux i386) - man page for pause (redhat section 2)

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

NAME
pause - wait for signal
SYNOPSIS
#include <unistd.h> int pause(void);
DESCRIPTION
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.
RETURN VALUE
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.
ERRORS
EINTR a signal was caught and the signal-catching function returned.
CONFORMING TO
SVr4, SVID, POSIX, X/OPEN, BSD 4.3
SEE ALSO
kill(2), select(2), signal(2) Linux 1995-08-31 PAUSE(2)