PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

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

PROLOG         top

       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         top

       pause — suspend the thread until a signal is received

SYNOPSIS         top

       #include <unistd.h>

       int pause(void);

DESCRIPTION         top

       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         top

       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         top

       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         top

       None.

APPLICATION USAGE         top

       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         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       sigsuspend(3p)

       The Base Definitions volume of POSIX.1‐2008, unistd.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) 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.unix.org/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                 2013                           PAUSE(3P)