Re: [PATCH] Enable dhcpcd instead of dhclient

[Roy Marples <roy marples name>]

Michael Biebl wrote:
> Roy Marples wrote:
> > On Thu, 2008-07-17 at 10:14 -0400, Dan Williams wrote:
> > > I don't have a problem with that.  So lets:
> > >
> > > 1) if given a full path that ends in dhclient or dhcpcd, don't do
> > > further checks just use that
> > > 2) Document the required versions in the README
> > > 3) If nothing is found or specified, default to dhclient since that's
> > > what it's been up until now
> >
> > Sounds good to me.
>
> Roy, will you write a patch for that?

Atttached is a patch for 1 and 3.
If no dhcp client is found, default to /sbin/dhclient and warn about it.
If a full path is given then don't check version, just use it. But do 
check we have a backend .c file for it.

I didn't do 2 as NM doesn't have a requirements file I could find.

Thanks

Roy

Index: configure.in
===================================================================
--- configure.in	(revision 3912)
+++ configure.in	(working copy)
@@ -336,7 +336,14 @@
 
 # DHCP client
 AC_ARG_WITH([dhcp-client], AS_HELP_STRING([--with-dhcp-client=dhcpcd|dhclient], [path to the chosen dhcp client]))
-if test "x$with_dhcp_client" = "x" || test x`basename "$with_dhcp_client"` = "xdhclient"; then
+# If a full path is given, use that and do not test if it works or not.
+case "${with_dhcp_client}" in
+	/*)
+		DHCP_CLIENT_PATH="${with_dhcp_client}"
+		AC_MSG_NOTICE(using the DHCP client ${DHCP_CLIENT_PATH})
+		;;
+esac
+if test "x$with_dhcp_client" = "x" -a "x$DHCP_CLIENT_PATH" != "x" || test x`basename "$with_dhcp_client"` = "xdhclient"; then
 	# We only work with ISC dhclient - the FreeBSD and OpenBSD derivatives don't have the same userland.
 	AC_MSG_CHECKING(for dhclient)
 	for client in "$with_dhcp_client" /sbin/dhclient /usr/pkg/sbin/dhclient /usr/local/sbin/dhclient; do
@@ -353,7 +360,7 @@
 	fi
 	AC_MSG_RESULT($DHCP_CLIENT_PATH)
 fi
-if test "x$with_dhcp_client" = "x" -a "x$DHCP_CLIENT_PATH" = "x" || test x`basename "$with_dhcp_client"` = "xdhcpcd"; then
+if test "x$with_dhcp_client" = "x" -a "x$DHCP_CLIENT_PATH" != "x" || test x`basename "$with_dhcp_client"` = "xdhcpcd"; then
 	# We fully work with upstream dhcpcd-4
 	AC_MSG_CHECKING([for dhcpcd])
 	for client in "$with_dhcp_client" /sbin/dhcpcd /usr/pkg/sbin/dhcpcd /usr/local/sbin/dhcpcd; do
@@ -372,10 +379,18 @@
 	AC_MSG_RESULT($DHCP_CLIENT_PATH)
 fi
 if test "x$DHCP_CLIENT_PATH" = "x"; then
-	AC_MSG_ERROR([Could not find a suitable DHCP client])
+	# DHCP clients are not a build time dependency, only runtime.
+	# dhclient has been the longtime default for NM and it's in /sbin
+	# in most distros, so use it.
+	AC_MSG_WARN([Could not find a suitable DHCP client])
+	DHCP_CLIENT_PATH=/sbin/dhclient
+	AC_MSG_WARN([Falling back to ISC dhclient, ${DHCP_CLIENT_PATH}])
 fi
 AC_SUBST(DHCP_CLIENT_PATH)
 DHCP_CLIENT=`basename "$DHCP_CLIENT_PATH"`
+if ! test -f src/dhcp-manager/nm-dhcp-"${DHCP_CLIENT}".c; then
+	AC_MSG_ERROR([No backend for the DHCP client ${DHCP_CLIENT}])
+fi
 AC_SUBST(DHCP_CLIENT)
 
 AC_ARG_ENABLE(more-warnings,