siginterrupt(3p) — Linux manual page

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

       siginterrupt — allow signals to interrupt functions

SYNOPSIS

       #include <signal.h>

       int siginterrupt(int sig, int flag);

DESCRIPTION

       The siginterrupt() function shall change the restart behavior
       when a function is interrupted by the specified signal. The
       function siginterrupt(sig, flag) has an effect as if implemented
       as:

           int siginterrupt(int sig, int flag) {
               int ret;
               struct sigaction act;

               (void) sigaction(sig, NULL, &act);
               if (flag)
                   act.sa_flags &= ~SA_RESTART;
               else
                   act.sa_flags |= SA_RESTART;
               ret = sigaction(sig, &act, NULL);
               return ret;
           }

RETURN VALUE

       Upon successful completion, siginterrupt() shall return 0;
       otherwise, -1 shall be returned and errno set to indicate the
       error.

ERRORS

       The siginterrupt() function shall fail if:

       EINVAL The sig argument is not a valid signal number.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       The siginterrupt() function supports programs written to
       historical system interfaces.  Applications should use the
       sigaction() with the SA_RESTART flag instead of the obsolescent
       siginterrupt() function.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       Section 2.4, Signal Concepts, sigaction(3p)

       The Base Definitions volume of POSIX.1‐2017, signal.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                  SIGINTERRUPT(3P)

Pages that refer to this page: signal.h(0p)

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