[PATCH 49/50] Modify hook loading to make it slightly easier to script.

Modules are now responsible for loading their hooks into the initrd.

This should be all the structure we need to make it easy for things
to integrate with dracut -- now to document and test it all.

Makefile

@@ -4,16 +4,16 @@ all:
 install:
 	mkdir -p $(DESTDIR)/usr/libexec/dracut
 	mkdir -p $(DESTDIR)/sbin
-	mkdir -p $(DESTDIR)/usr/libexec/dracut/pre-mount
-	mkdir -p $(DESTDIR)/usr/libexec/dracut/pre-udev
-	mkdir -p $(DESTDIR)/usr/libexec/dracut/pre-pivot
+	mkdir -p $(DESTDIR)/usr/libexec/dracut/hooks
+	mkdir -p $(DESTDIR)/usr/libexec/dracut/modules
 	install -m 0755 dracut $(DESTDIR)/sbin/dracut
 	install -m 0755 init $(DESTDIR)/usr/libexec/dracut/init
 	install -m 0755 switch_root $(DESTDIR)/usr/libexec/dracut/switch_root
 	install -m 0755 dracut-functions $(DESTDIR)/usr/libexec/dracut/functions
 	mkdir $(DESTDIR)/usr/libexec/dracut/rules.d
 	for rule in rules.d/*.rules ; do install -m 0644 $$rule $(DESTDIR)/usr/libexec/dracut ; done
-	for hooks in pre-*/* ; do install -m 0755 $$hook $(DESTDIR/usr/libexec/dracut ; done
+	for hooks in hooks/* ; do install -m 0755 $$hook $(DESTDIR)/usr/libexec/dracut ; done
+	for module in modules/*; do install -m 0755 $$module $(DESTDIR)/usr/libexec/dracut ; done
 clean:
 	rm -f *~
 

dracut-functions

@@ -145,6 +145,22 @@ inst() {
     return 1
 }
 
+# install function specialized for hooks
+# $1 = type of hook, $2 = hook priority (lower runs first), $3 = hook
+# All hooks should be POSIX/SuS compliant, they will be sourced by init.
+inst_hook() {
+    [[ -f $3 ]] || {
+	echo "Cannot install a hook ($3) that does not exist." >&2
+	echo "Aborting initrd creation." >&2
+	exit 1
+    }
+    strstr "$hookdirs" "$1" || {
+	echo "No such hook type $1. Aborting initrd creation." >&2
+	exit 1
+    }
+    inst_simple "$3" "/${1}/${2}${3##*/}"
+}
+
 dracut_install() {
     while (($# > 0)); do
 	inst "$1" && shift

modules/90crypt

@@ -1,3 +1,4 @@
 #!/bin/bash
 inst cryptsetup
 inst_rules "$dsrc/rules.d/63-luks.rules"
+inst_hook pre-mount 50 "$dsrc/hooks/cryptroot"

modules/99base

@@ -4,9 +4,6 @@ dracut_install mount mknod mkdir modprobe pidof sleep chroot echo sed sh ls
 # install our scripts and hooks
 inst "$initfile" "/init"
 inst "$switchroot" "/sbin/switch_root"
-for hookdir in $hookdirs; do
-    for hook in "$dsrc/$hookdir"/*; do
-	[[ -f $hook ]] && inst "$hook" "/$hookdir/${hook##*/}"
-    done
-done
+inst_hook pre-pivot 50 "$dsrc/hooks/selinux-loadpolicy"
+inst_hook pre-mount 99 "$dsrc/hooks/resume"