#!/bin/sh
#
# $FreeBSD: head/usr.bin/kdump/mkioctls 226157 2011-10-08 12:47:00Z des $

set -e

if [ -z "$1" ]; then
	echo "usage: sh $0 include-dir"
	exit 1
fi

LC_ALL=C; export LC_ALL

# Build a list of headers that have ioctls in them.
# XXX should we use an ANSI cpp?
ioctl_includes=`
	cd $1
	find -H -s * -name '*.h' |
		xargs egrep -l \
'^#[ 	]*define[ 	]+[A-Za-z_][A-Za-z0-9_]*[ 	]+_IO[^a-z0-9_]' |
		awk '{printf("#include <%s>\\\\n", $1)}'
`

awk -v x="$ioctl_includes" 'BEGIN {print x}' |
	gcc -E -I$1 -dM -DCOMPAT_43TTY - |
	awk -v ioctl_includes="$ioctl_includes" '
BEGIN {
	print "/* XXX obnoxious prerequisites. */"
	print "#define COMPAT_43"
	print "#define COMPAT_43TTY"
	print "#include <sys/param.h>"
	print "#include <sys/devicestat.h>"
	print "#include <sys/disklabel.h>"
	print "#include <sys/socket.h>"
	print "#include <sys/time.h>"
	print "#include <sys/tty.h>"
	print "#include <bsm/audit.h>"
	print "#include <net/ethernet.h>"
	print "#include <net/if.h>"
	print "#include <net/if_var.h>"
	print "#include <net/pfvar.h>"
	print "#include <net/route.h>"
	print "#include <netinet/in.h>"
	print "#include <netinet/ip_mroute.h>"
	print "#include <netinet6/in6_var.h>"
	print "#include <netinet6/nd6.h>"
	print "#include <netinet6/ip6_mroute.h>"
	print "#include <stdio.h>"
	print "#include <cam/cam.h>"
	print ""
	print "void ioctlname(unsigned long val, int decimal);"
	print ""
	print ioctl_includes
	print ""
	print "void"
	print "ioctlname(unsigned long val, int decimal)"
	print "{"
	print "\tconst char *str = NULL;"
	print ""
}

/^#[ 	]*define[ 	]+[A-Za-z_][A-Za-z0-9_]*[ 	]+_IO/ {

	# find where the name starts
	for (i = 1; i <= NF; i++)
		if ($i ~ /define/)
			break;
	++i;
	#
	print("\t");
	if (n++ > 0)
		print("else ");
	printf("if (val == %s)\n", $i);
	printf("\t\tstr = \"%s\";\n", $i);
}
END {
	print "\n"
	print "\tif (str != NULL)\n"
	print "\t\tprintf(\"%s\", str);\n"
	print "\telse if (decimal)\n"
	print "\t\tprintf(\"%lu\", val);\n"
	print "\telse\n"
	print "\t\tprintf(\"%#lx\", val);\n"
	print "}"
}
'