pause(3p) — Linux manual page

PAUSE(3P)               POSIX Programmer's Manual              PAUSE(3P)

PROLOG

       This manual page is part of the POSIX Programmer's Manual.  The
       Linux implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior),
       or the interface may not be implemented on Linux.

NAME

       pause — suspend the thread until a signal is received

SYNOPSIS

       #include <unistd.h>

       int pause(void);

DESCRIPTION

       The pause() function shall suspend the calling thread 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, pause() shall not
       return.

       If the action is to execute a signal-catching function, pause()
       shall return after the signal-catching function returns.

RETURN VALUE

       Since pause() suspends thread execution indefinitely unless
       interrupted by a signal, there is no successful completion return
       value. A value of -1 shall be returned and errno set to indicate
       the error.

ERRORS

       The pause() function shall fail if:

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

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       Many common uses of pause() have timing windows. The scenario
       involves checking a condition related to a signal and, if the
       signal has not occurred, calling pause().  When the signal occurs
       between the check and the call to pause(), the process often
       blocks indefinitely. The sigprocmask() and sigsuspend() functions
       can be used to avoid this type of problem.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       sigsuspend(3p)

       The Base Definitions volume of POSIX.1‐2017, unistd.h(0p)

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any
       discrepancy between this version and the original IEEE and The
       Open Group Standard, the original IEEE and The Open Group
       Standard is the referee document. The original Standard can be
       obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page
       are most likely to have been introduced during the conversion of
       the source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group               2017                         PAUSE(3P)

Pages that refer to this page: unistd.h(0p), alarm(3p), sighold(3p), signal(3p), sigsuspend(3p), sigtimedwait(3p), sigwait(3p), sleep(3p)

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