root/trunk/Jgraph/exit.c

/*
**++
**  FUNCTIONAL DESCRIPTION:
**
**      Exit is a VMS replacement for the standard Unix exit function
**
**  FORMAL PARAMETERS:
**
**      error_code      integer passed by value (optional)
**
**  SIDE EFFECTS:
**
**      Exit will never return to calling program
**      VMS exit status ($STATUS) will be set
**--
**/
#include <stdarg.h>

exit(va_alist)
va_dcl
{
        int             nargs;
        va_list         va;
        int             exit_code = 0;
        /*
         * Pick up the argument, if present
         */
        va_count(nargs);
        va_start(va);
        if (nargs > 0) exit_code = va_arg(va,int);
        /*
         * Set the VMS $STATUS to the appropriate value:
         *      if exit_code == 0 then $STATUS := success
         *      if exit_code >  0 then $STATUS := error
         *      if exit_code <  0 then $STATUS := severe_error
         * and perform exit.
         *
         * Note:
         *      the %X10000000 added to the actual success/error indicator
         *      will prevent DCL from printing a message.
         *      A 'on error' will be obeyed however.
         */
        if (exit_code == 0)             /* success      */
                sys$exit(0x10000001);
        else if (exit_code > 0)         /* error        */
                sys$exit(0x10000002);
        else                            /* severe error */
                sys$exit(0x10000004);
}