Metaconfig documentation update (part 2)

[metaconfig.git] / dist-3.0at70b / mcon / U / i_sysioctl.U

?RCS: $Id: i_sysioctl.U,v 3.0.1.2 1994/05/06 15:04:57 ram Exp $
?RCS:
?RCS: Copyright (c) 1991-1993, Raphael Manfredi
?RCS: 
?RCS: You may redistribute only under the terms of the Artistic Licence,
?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 Licence; a copy of which may be found at the root
?RCS: of the source tree for dist 3.0.
?RCS:
?RCS: $Log: i_sysioctl.U,v $
?RCS: Revision 3.0.1.2  1994/05/06  15:04:57  ram
?RCS: patch23: added knowledge for <sys/filio.h> (WED)
?RCS: patch23: optimized amount of findhdr calls
?RCS:
?RCS: Revision 3.0.1.1  1993/11/10  17:36:09  ram
?RCS: patch14: now use a compiler check for TIOCNOTTY because of HP-UX 9.x
?RCS:
?RCS: Revision 3.0  1993/08/18  12:08:32  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?MAKE:i_sysioctl i_bsdioctl i_sysfilio i_syssockio d_voidtty: test contains \
	cat i_termio i_termios i_sgtty Setvar Findhdr +cc rm Inhdr
?MAKE:	-pick add $@ %<
?S:i_sysioctl:
?S:	This variable conditionally defines the I_SYS_IOCTL symbol, which
?S:	indicates to the C program that <sys/ioctl.h> exists and should
?S:	be included.
?S:.
?S:i_sysfilio:
?S:	This variable conditionally defines the I_SYS_FILIO symbol, which
?S:	indicates to the C program that <sys/filio.h> exists and should
?S:	be included in preference to <sys/ioctl.h>.
?S:.
?S:i_bsdioctl:
?S:	This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
?S:	indicates to the C program that <sys/bsdioctl.h> exists and should
?S:	be included.
?S:.
?S:i_syssockio:
?S:	This variable conditionally defines I_SYS_SOCKIO to indicate to the
?S:	C program that socket ioctl codes may be found in <sys/sockio.h>
?S:	instead of <sys/ioctl.h>.
?S:.
?S:d_voidtty:
?S:	This variable conditionally defines USE_IOCNOTTY to indicate that the
?S:	ioctl() call with TIOCNOTTY should be used to void tty association.
?S:	Otherwise (on USG probably), it is enough to close the standard file
?S:	decriptors and do a setpgrp().
?S:.
?C:I_SYS_IOCTL (I_SYSIOCTL):
?C:	This symbol, if defined, indicates that <sys/ioctl.h> exists and should
?C:	be included. Otherwise, include <sgtty.h> or <termio.h>.
?C:.
?C:I_SYS_FILIO:
?C:	This symbol, if defined, indicates that <sys/filio.h> exists and
?C:	should be included instead of <sys/ioctl.h>.
?C:.
?C:I_SYS_BSDIOCTL (I_BSDIOCTL):
?C:	This symbol, if defined, indicates that <sys/bsdioctl.h> exists and should
?C:	be included. Otherwise, try <sys/ioctl.h>. This is primarly intended for
?C:	definitions of sockets options, like SIOCATMARK.
?C:.
?C:I_SYS_SOCKIO (I_SYSSOCKIO):
?C:	This symbol, if defined, indicates the <sys/sockio.h> should be included
?C:	to get socket ioctl options, like SIOCATMARK.
?C:.
?C:USE_TIOCNOTTY (VOIDTTY):
?C:	This symbol, if defined indicate to the C program that the ioctl()
?C:	call with TIOCNOTTY should be used to void tty association.
?C:	Otherwise (on USG probably), it is enough to close the standard file
?C:	decriptors and do a setpgrp().
?C:.
?H:#$i_sysioctl	I_SYS_IOCTL		/**/
?H:#$i_sysfilio	I_SYS_FILIO		/**/
?H:#$i_bsdioctl	I_SYS_BSDIOCTL		/**/
?H:#$i_syssockio I_SYS_SOCKIO	/**/
?H:#$d_voidtty USE_TIOCNOTTY	/**/
?H:.
?T:xxx
: see if ioctl defs are in sgtty, termio, sys/filio or sys/ioctl
?LINT:set i_sysfilio
set sys/filio.h i_sysfilio
eval $inhdr
echo " "
if $test `./findhdr sys/ioctl.h`; then
	val="$define"
	echo '<sys/ioctl.h> found.' >&4
else
	val="$undef"
	if $test $i_sysfilio = "$define"; then
	    echo '<sys/ioctl.h> NOT found.' >&4
	else
		$test $i_sgtty = "$define" && xxx="sgtty.h"
		$test $i_termio = "$define" && xxx="termio.h"
		$test $i_termios = "$define" && xxx="termios.h"
echo "No <sys/ioctl.h> found, assuming ioctl args are defined in <$xxx>." >&4
	fi
fi
?LINT:set i_sysioctl
set i_sysioctl
eval $setvar

@if I_BSDIOCTL || i_bsdioctl
?X:
?X:	The only machine I know where this inclusion was necessary is a
?X:	BULL DPX 5000 (a French machine).
?X:
: see if socket ioctl defs are in sys/bsdioctl or sys/ioctl
echo " "
xxx=`./findhdr sys/bsdioctl.h`
if $test "$xxx"; then
	if $contains SIOCATMARK $xxx >/dev/null 2>&1; then
		val="$define"
		echo "You have socket ioctls defined in <sys/bsdioctl.h>." >&4
	else
		val="$undef"
		echo "No socket ioctls found in <sys/bsdioctl.h>." >&4
	fi
else
	val="$undef"
	echo "<sys/bsdioctl.h> not found, but that's ok." >&4
fi
?LINT:set i_bsdioctl
set i_bsdioctl
eval $setvar

@end
@if I_SYSSOCKIO || i_syssockio
: see if socket ioctl defs are in sys/sockio.h
echo " "
xxx=`./findhdr sys/sockio.h`
if $test "$xxx"; then
	if $contains SIOCATMARK $xxx >/dev/null 2>&1; then
		val="$define"
		echo "You have socket ioctls defined in <sys/sockio.h>." >&4
	else
		val="$undef"
		echo "No socket ioctls found in <sys/sockio.h>." >&4
	fi
else
	val="$undef"
@if I_BSDIOCTL
	case "$i_bsdioctl" in
	"$define") $cat <<EOM
<sys/sockio.h> not found, using ioctls from <sys/bsdioctl.h>.
EOM
	;;
	*) $cat <<EOM
<sys/sockio.h> not found, assuming socket ioctls are in <sys/ioctl.h>.
EOM
	;;
	esac
@else
	$cat <<EOM
<sys/sockio.h> not found, assuming socket ioctls are in <sys/ioctl.h>.
EOM
@end
fi
?LINT:set i_syssockio
set i_syssockio
eval $setvar

@end
@if VOIDTTY || d_voidtty
: check how to void tty association
echo " "
case "$i_sysioctl" in
"$define") xxx='sys/ioctl.h';;
?X: otherwise $xxx was set during the determination of i_sysioctl, above.
esac
?X:
?X: Can't use $contains here since HP-UX 9.x has TIOCNOTTY between a pair
?X: of #ifdef/#endif and is never actually defined. Oh well...
?X:
$cat > tcio.c <<EOM
#include <sys/types.h>	/* Just in case */
#include <$xxx>

int main()
{
#ifdef TIOCNOTTY
	exit(0);
#else
	exit(1);
#endif
}
EOM
if ($cc -o tcio tcio.c && ./tcio) >/dev/null 2>&1; then
	val="$define"
	echo "TIOCNOTTY found in <$xxx>." >&4
	echo "Using ioctl() call on /dev/tty to void tty association." >&4
else
	val="$undef"
	echo "Closing standard file descriptors should void tty association." >&4
fi
?LINT:set d_voidtty
set d_voidtty
eval $setvar
$rm -f tcio tcio.? core

@end