From 3c04ecde671ef12c01ff79393f936b879fb08f04 Mon Sep 17 00:00:00 2001
From: Matthijs Kooijman <matthijs@stdin.nl>
Date: Fri, 19 Mar 2010 21:30:31 +0100
Subject: [PATCH] Add local and chroot backends.

---
 configure.in             |  1 +
 lib/Makefile.am          |  2 ++
 lib/backend.in           |  2 +-
 lib/backends/Makefile.am | 19 ++++++++++++++++++
 lib/backends/chroot.in   | 42 ++++++++++++++++++++++++++++++++++++++++
 lib/backends/local.in    | 33 +++++++++++++++++++++++++++++++
 6 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 lib/backends/Makefile.am
 create mode 100644 lib/backends/chroot.in
 create mode 100644 lib/backends/local.in

diff --git a/configure.in b/configure.in
index da2d6ba..0bae7ea 100644
--- a/configure.in
+++ b/configure.in
@@ -80,6 +80,7 @@ AC_CONFIG_FILES([Makefile
                 examples/Makefile
                 handlers/Makefile
                 lib/Makefile
+                lib/backends/Makefile
                 man/Makefile
                 src/Makefile])
 
diff --git a/lib/Makefile.am b/lib/Makefile.am
index df8ed61..a3b11a5 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -4,6 +4,8 @@ CLEANFILES = $(pkglib_SCRIPTS)
 
 EXTRA_DIST = $(pkglib_SCRIPTS:%=%.in)
 
+SUBDIRS = backends
+
 edit = sed \
     -e "s,@CFGDIR\@,$(CFGDIR),g" \
     -e "s,@BASH\@,$(BASH),g" \
diff --git a/lib/backend.in b/lib/backend.in
index 0c130f2..ea1be82 100644
--- a/lib/backend.in
+++ b/lib/backend.in
@@ -1,7 +1,7 @@
 # -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
 # vim: set filetype=sh sw=3 sts=3 expandtab autoindent:
 
-defined_backends=()
+defined_backends=(local, chroot)
 available_backends=()
 
 function init_backends () {
diff --git a/lib/backends/Makefile.am b/lib/backends/Makefile.am
new file mode 100644
index 0000000..a297908
--- /dev/null
+++ b/lib/backends/Makefile.am
@@ -0,0 +1,19 @@
+BACKENDS = local chroot
+
+pkglib_SCRIPTS = $(BACKENDS)
+
+CLEANFILES = $(BACKENDS)
+
+EXTRA_DIST = $(BACKENDS:%=%.in)
+
+edit = sed \
+    -e "s,@CFGDIR\@,$(CFGDIR),g" \
+    -e "s,@BASH\@,$(BASH),g" \
+    -e "s,@AWK\@,$(AWK),g" \
+    -e "s,@SED\@,$(SED),g" \
+    -e "s,@MKTEMP\@,$(MKTEMP),g" \
+    -e "s,@libdir\@,$(pkglibdir),g" 
+
+$(BACKENDS): %: $(srcdir)/%.in
+	rm -f $@
+	$(edit) $@.in > $@
diff --git a/lib/backends/chroot.in b/lib/backends/chroot.in
new file mode 100644
index 0000000..b0c5cfa
--- /dev/null
+++ b/lib/backends/chroot.in
@@ -0,0 +1,42 @@
+# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
+# vim: set filetype=sh sw=3 sts=3 expandtab autoindent:
+
+getconf CHROOT "`which chroot`"
+
+function backend_chroot_init () {
+	# Is the changeroot command available?
+    [ -x "$CHROOT" ]
+}
+
+function backend_chroot_host_available () {
+   if [ -d "$1" ]; then
+      # The root exists and is a directory, everything ok
+      return 0
+   else
+      if [ ! -e "$1" ]; then
+         # The root does not exist?
+         eval "$2=\"No such file or directory: '\$1'\""
+      else
+         # The root exists, so is not a directory
+         eval "$2=\"Not a directory: '\$1'\""
+      fi
+      return 1
+   fi
+}
+
+function backend_chroot_host_root () {
+   # The host part is the root, but strip any trailing slashes
+   echo "$1" | sed 's/\/*$//'
+}
+
+function backend_chroot_run () {
+   # Run the command using the chroot command
+   "$CHROOT" "$root" "$@"
+}
+
+function backend_chroot_interpolate_vars () {
+   echo ""
+}
+
+function backend_chroot_interpolate_value () {
+}
diff --git a/lib/backends/local.in b/lib/backends/local.in
new file mode 100644
index 0000000..069e201
--- /dev/null
+++ b/lib/backends/local.in
@@ -0,0 +1,33 @@
+# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
+# vim: set filetype=sh sw=3 sts=3 expandtab autoindent:
+
+function backend_local_init () {
+	# We're always available
+	return 0
+}
+
+function backend_local_host_available () {
+   if [ -n "$1" ]; then
+      eval "$2=The local backend does not support named hosts: '\$1'"
+      return 1
+   fi
+   # The empty host (i.e., "local:") is always available
+   return 0
+}
+
+function backend_local_host_root () {
+   # We just use the entire filesystem
+   echo ""
+}
+
+function backend_local_run () {
+   # Running locally is simple, just run the command
+   "$@"
+}
+
+function backend_local_interpolate_vars () {
+   echo ""
+}
+
+function backend_local_interpolate_value () {
+}
-- 
2.30.2