trusty (3) siginterrupt.3posix.gz

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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. A conforming
       application, when being written or rewritten, should use sigaction() with the SA_RESTART flag instead  of
       siginterrupt().


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       Signal Concepts , sigaction() , the Base Definitions volume of IEEE Std 1003.1-2001, <signal.h>


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base
       Specifications Issue 6, Copyright (C) 2001-2003 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 .