[Pkg-sysvinit-devel] [PATCH 2/4] update-rc.d: Allow update-rc.d to perform actions on alternative filesystems

[Kel Modderman]

Add a -d <path> command line option so that runlevel links can be manipulated
in eg. different chroot or in test suite.
---
--- a/debian/sysv-rc/sbin/update-rc.d
+++ b/debian/sysv-rc/sbin/update-rc.d
@@ -6,8 +6,9 @@
 use strict;
 use warnings;
 
-my $initd = "/etc/init.d";
-my $etcd  = "/etc/rc";
+my $dir   = "/";
+my $initd = "etc/init.d";
+my $etcd  = "etc/rc";
 my $notreally = 0;
 
 # Print usage message and die.
@@ -15,11 +16,12 @@
 sub usage {
 	print STDERR "update-rc.d: error: @_\n" if ($#_ >= 0);
 	print STDERR <<EOF;
-usage: update-rc.d [-n] [-f] <basename> remove
-       update-rc.d [-n] <basename> defaults [NN | SS KK]
-       update-rc.d [-n] <basename> start|stop NN runlvl [runlvl] [...] .
+usage: update-rc.d [-d <path>] [-n] [-f] <basename> remove
+       update-rc.d [-d <path>] [-n] <basename> defaults [NN | SS KK]
+       update-rc.d [-d <path>] [-n] <basename> start|stop NN runlvl [runlvl] [...] .
 		-n: not really
 		-f: force
+		-d: path to alternate /
 EOF
 	exit (1);
 }
@@ -31,6 +33,7 @@
 	shift @ARGV;
 	if (/^-n$/) { $notreally++; next }
 	if (/^-f$/) { $force++; next }
+	if (/^-d$/) { $dir = shift @ARGV; next }
 	if (/^-h|--help$/) { &usage; }
 	&usage("unknown option");
 }
@@ -38,6 +41,16 @@
 # Action.
 
 &usage() if ($#ARGV < 1);
+
+if (-d $dir) {
+    $dir =~ s/\/$//;
+    $initd = "$dir/$initd";
+    $etcd  = "$dir/$etcd";
+} else {
+    print STDERR "update-rc.d: directory does not exist '$dir'\n";
+    exit (1)
+}
+
 my $bn = shift @ARGV;
 
 unless ($bn =~ m/[a-zA-Z0-9+.-]+/) {
--- a/debian/sysv-rc/man8/update-rc.d.8
+++ b/debian/sysv-rc/man8/update-rc.d.8
@@ -5,16 +5,19 @@
 update\-rc.d \- install and remove System-V style init script links
 .SH SYNOPSIS
 .B update\-rc.d
+.RI [ -d " path " ]
 .RI [ -n ]
 .RI [ -f ]
 .IB name " remove"
 .HP
 .B update-rc.d
+.RI [ -d " path " ]
 .RI [ -n ]
 .IB name " defaults"
 .RI [ NN " | " SS " " KK ]
 .HP
 .B update-rc.d
+.RI [ -d " path " ]
 .RI [ -n ]
 .I name
 .BR start | stop
@@ -200,6 +203,11 @@
 
 .SH OPTIONS
 .TP
+.I -d path
+Path to alternative /, actions are performed on initscripts and
+runlevel directories relative to
+.BI <path> "."
+.TP
 .I -n
 Don't do anything, just show what we would do.
 .TP
---