From 8eae53de0f2d11a664cf71412bc6354e6fa6b2ff Mon Sep 17 00:00:00 2001
From: codehelp <codehelp@debian.org>
Date: Mon, 7 Feb 2011 12:19:44 +0000
Subject: [PATCH] Improve the fix for #553599 and generalise it. Handle making
 a real directory for amd64 to cope with libc6-amd64 [i386].

git-svn-id: http://emdebian.org/svn/current@7752 563faec7-e20c-0410-992a-a66f704d0ccd
---
 debian/changelog |  4 ++-
 multistrap       | 69 ++++++++++++++++++++----------------------------
 pod/multistrap   | 22 ++++++++++++++-
 3 files changed, 52 insertions(+), 43 deletions(-)

diff --git a/debian/changelog b/debian/changelog
index 3c682ea..33bbcae 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,8 +4,10 @@ multistrap (2.1.11) unstable; urgency=low
     use consistent tabs. (Closes: #611808)
   * Add example for wheezy and use permanent codenames.
   * Remove workaround for apt from lenny.
+  * Improve the fix for #553599 and generalise it. Handle making a real
+    directory for amd64 to cope with libc6-amd64 [i386].
 
- -- Neil Williams <codehelp@debian.org>  Mon, 07 Feb 2011 12:09:55 +0000
+ -- Neil Williams <codehelp@debian.org>  Mon, 07 Feb 2011 12:14:17 +0000
 
 multistrap (2.1.10) experimental; urgency=low
 
diff --git a/multistrap b/multistrap
index 6157c9f..057e1cc 100755
--- a/multistrap
+++ b/multistrap
@@ -193,27 +193,7 @@ if (not -d "${dir}dev") {
 	mkdir "${dir}dev";
 }
 
-# prevent the absolute symlink in libc6 from allowing
-# writes outside the multistrap root dir. See: #553599
-if (-l "${dir}lib64" ) {
-	my $r = readlink "${dir}lib64";
-	if ($r =~ m:^/:) {
-		my $old = `pwd`;
-		chomp ($old);
-		unlink "${dir}lib64";
-		chdir ("$dir");
-		print _g("INF: ./lib64 -> /lib symbolic link reset to ./lib.\n");
-		symlink "./lib", "lib64";
-		chdir ("${old}");
-	}
-} else {
-	my $old = `pwd`;
-	chomp ($old);
-	chdir ("$dir");
-	print _g("INF: Setting ./lib64 -> ./lib symbolic link.\n");
-	symlink "./lib", "lib64";
-	chdir ("${old}");
-}
+&guard_lib64($dir);
 
 system ("rm -rf ${dir}etc/apt/sources.list.d/*");
 unlink ("${dir}etc/apt/sources.list")
@@ -378,13 +358,8 @@ system ("$setupsh $dir $arch") if ((defined $setupsh) and (-x $setupsh));
 &add_extra_packages;
 system ("cp $configsh $dir/") if ((defined $configsh) and (-f $configsh));
 (not defined $tidy) ? system ("apt-get $config_str update") : &tidy_apt;
-if (-l "${dir}lib64" ) {
-	my $r = readlink "${dir}lib64";
-	if ($r =~ m:^/:) {
-		print _g("ERR: ./lib64 -> /lib symbolic link reset to ./lib after unpacking.\n");
-		printf (_g("ERR: Some files may have been unpacked outside %s!\n"), $dir);
-	}
-}
+&guard_lib64($dir);
+
 # cleanly separate the bootstrap sources from the final apt sources.
 unlink ("${dir}etc/apt/sources.list.d/multistrap.sources.list")
 	if (-f "${dir}etc/apt/sources.list.d/multistrap.sources.list");
@@ -570,19 +545,7 @@ sub force_unpack {
 		print STATUS "\n";
 		close (STATUS);
 		system ("rm -rf ./${tmpdir}");
-		if (-l "${dir}lib64" ) {
-			my $r = readlink "${dir}lib64";
-			if ($r =~ m:^/:) {
-				my $old = `pwd`;
-				chomp ($old);
-				printf (_g("ERR: lib64 -> ./lib symbolic link clobbered by %s\n"), $pkg);
-				unlink "${dir}lib64";
-				chdir ("$dir");
-				print _g("INF: lib64 -> /lib symbolic link reset to ./lib.\n");
-				symlink "./lib", "lib64";
-				chdir ("${old}");
-			}
-		}
+		&guard_lib64 ($dir);
 	}
 	chdir ("$old");
 	print _g("I: Unpacking complete.\n");
@@ -600,6 +563,30 @@ sub force_unpack {
 	}
 }
 
+# prevent the absolute symlink in libc6 from allowing
+# writes outside the multistrap root dir. See: #553599
+sub guard_lib64 {
+	my $dir = shift;
+	my $old = `pwd`;
+	chomp ($old);
+	unlink "${dir}lib64" if (-f "${dir}lib64");
+	if (-l "${dir}lib64" ) {
+		my $r = readlink "${dir}lib64";
+		chomp ($r);
+		unlink "${dir}lib64" if ($r =~ m:^/lib$:);
+	} elsif (not -d "${dir}lib64") {
+		chdir ("$dir");
+		if ($host eq 'i386' and $arch eq 'amd64') {
+			print _g("INF: Replaced ./lib64 -> /lib symbolic link with new ./lib64 directory.\n");
+			mkdir ("./lib64");
+		} else {
+			print _g("INF: Setting ./lib64 -> ./lib symbolic link.\n");
+			symlink "./lib", "lib64";
+		}
+	}
+	chdir ("${old}");
+}
+
 sub check_bin_sh {
 	$dir = shift;
 	my $old = `pwd`;
diff --git a/pod/multistrap b/pod/multistrap
index 4600dff..4dfb278 100644
--- a/pod/multistrap
+++ b/pod/multistrap
@@ -227,7 +227,7 @@ never actually happen.
 listed in this Section. If no keyring is specified, the C<noauth>
 option must be set to B<true>. See Secure Apt.
 
-'suite' is the suite to use from this source. Note that this B<must>
+'suite' is the suite to use from this source. Note that this should
 be the suite, not the codename.
 
 Suites change from time to time: (oldstable, stable, testing, sid)
@@ -592,6 +592,26 @@ Files which do not exist or which cannot be opened will be silently
 ignored. Check the results of the parsing using the C<--simulate>
 option to C<multistrap>.
 
+=head1 Hooks
+
+If a hook directory is specified in the General section of the
+C<multistrap> configuration file, the hook scripts which are executable
+will be run from outside the multistrap directory at the following stages:
+
+ A hooks
+
+Executed before unpacking is started
+
+ D hooks
+
+Executed immediately before the tarball is created or C<multistrap> exits
+if not configured to create a tarball.
+
+Hooks are passed the absolute path to the directory which will be the
+top level directory of the chroot or multistrap system. Hooks which
+cannot be resolved using realpath or which are not executable will be
+ignored.
+
 =head1 Output
 
 C<multistrap> can produce a lot of output - informational messages