Mass update of *headers* in dist/U from git

[metaconfig.git] / dist / U / d_getpgrp.U

?RCS: $Id$
?RCS:
?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
?RCS: 
?RCS: You may redistribute only under the terms of the Artistic License,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic License; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?RCS: $Log: d_getpgrp.U,v $
?RCS: Revision 3.0.1.1  1997/02/28  15:34:28  ram
?RCS: patch61: new USE_BSD_GETPGRP to detect the getpgrp() flavour
?RCS:
?RCS: Revision 3.0  1993/08/18  12:06:15  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?MAKE:d_getpgrp d_bsdgetpgrp: Guess Inlibc Setvar cat rm \
	+cc +ccflags +ldflags +libs i_unistd
?MAKE:	-pick add $@ %<
?S:d_getpgrp:
?S:	This variable conditionally defines HAS_GETPGRP if getpgrp() is
?S:	available to get the current process group.
?S:.
?S:d_bsdgetpgrp:
?S:	This variable conditionally defines USE_BSD_GETPGRP if
?S:	getpgrp needs one arguments whereas USG one needs none.
?S:.
?C:HAS_GETPGRP (GETPGRP):
?C:	This symbol, if defined, indicates that the getpgrp routine is
?C:	available to get the current process group.
?C:.
?C:USE_BSD_GETPGRP:
?C:	This symbol, if defined, indicates that getpgrp needs one
?C:	arguments whereas USG one needs none.
?C:.
?H:#$d_getpgrp HAS_GETPGRP		/**/
?H:#$d_bsdgetpgrp USE_BSD_GETPGRP	/**/
?H:.
?F:!set !set.c
?T:xxx
?LINT:set d_getpgrp d_bsdgetpgrp
: see if getpgrp exists
set getpgrp d_getpgrp
eval $inlibc

@if USE_BSD_GETPGRP || d_bsdgetpgrp
case "$d_getpgrp" in
"$define")
	echo " "
	echo "Checking to see which flavor of getpgrp is in use..."
	$cat >set.c <<EOP
#$i_unistd I_UNISTD
#include <sys/types.h>
#ifdef I_UNISTD
#  include <unistd.h>
#endif
int main()
{
	if (getuid() == 0) {
		printf("(I see you are running Configure as super-user...)\n");
		setuid(1);
	}
#ifdef TRY_BSD_PGRP
	if (getpgrp(1) == 0)
		exit(0);
#else
	if (getpgrp() > 0)
		exit(0);
#endif
	exit(1);
}
EOP
	if $cc -DTRY_BSD_PGRP $ccflags $ldflags -o set set.c $libs >/dev/null 2>&1
		&& ./set
	then
		echo "You have to use getpgrp(pid) instead of getpgrp()." >&4
		val="$define"
	elif $cc $ccflags $ldflags -o set set.c $libs >/dev/null 2>&1 && ./set; then
		echo "You have to use getpgrp() instead of getpgrp(pid)." >&4
		val="$undef"
	else
		echo "I can't seem to compile and run the test program."
		if ./usg; then
			xxx="a USG one, i.e. you use getpgrp()."
		else
			# SVR4 systems can appear rather BSD-ish.
			case "$i_unistd" in
			$undef)
				xxx="a BSD one, i.e. you use getpgrp(pid)."
				val="$define"
				;;
			$define)
				xxx="probably a USG one, i.e. you use getpgrp()."
				val="$undef"
				;;
			esac
		fi
		echo "Assuming your getpgrp is $xxx" >&4
	fi
	;;
*) val="$undef";;
esac
set d_bsdgetpgrp
eval $setvar
$rm -f set set.c
@end