Equivalent to setpgid(0,0). Not
available on all platforms.
/*
* call-seq:
* Process.setpgrp => 0
*
* Equivalent to <code>setpgid(0,0)</code>. Not available on all
* platforms.
*/
static VALUE
proc_setpgrp()
{
rb_secure(2);
/* check for posix setpgid() first; this matches the posix */
/* getpgrp() above. It appears that configure will set SETPGRP_VOID */
/* even though setpgrp(0,0) would be prefered. The posix call avoids */
/* this confusion. */
#ifdef HAVE_SETPGID
if (setpgid(0,0) < 0) rb_sys_fail(0);
#elif defined(HAVE_SETPGRP) && defined(SETPGRP_VOID)
if (setpgrp() < 0) rb_sys_fail(0);
#else
rb_notimplement();
#endif
return INT2FIX(0);
}