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NAME
       raise - send a signal to the executing process


SYNOPSIS
       #include <signal.h>

       int raise(int sig);


DESCRIPTION
       The  raise()  function  shall  send  the  signal  sig to the executing    thread or process.  If a signal
       handler is called, the raise() function shall not return until after the signal handler does.

       If the implementation supports the Threads option, the effect of the raise() function shall be equivalent
       to calling:

              pthread_kill(pthread_self(), sig);

       Otherwise, the effect of the raise() function shall be equivalent to calling:

              kill(getpid(), sig);


RETURN VALUE
       Upon  successful  completion,  0  shall be returned. Otherwise, a non-zero value shall be returned    and
       errno shall be set to indicate the error.


ERRORS
       The raise() function shall fail if:

       EINVAL The value of the sig argument is an invalid signal number.

       The following sections are informative.


EXAMPLES
       None.


APPLICATION USAGE
       None.


RATIONALE
       The term "thread" is an extension to the ISO C standard.


FUTURE DIRECTIONS
       None.


SEE ALSO
       kill() , sigaction() , the Base Definitions volume of IEEE Std 1003.1-2001, <signal.h>, <sys/types.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 .