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Bug#800651: debian-edu-config: debian-edu-fsautoresize fails if /proc/mounts contains /dev/dm-X entries



On Fri, Oct 02, 2015 at 08:45:42AM +0200, Wolfgang Schweer wrote:
> Package: debian-edu-config
> Version: 1.818
> Severity: important
> Tags: patch
 
This patch works for me:

--- a/debian-edu-fsautoresize	2015-09-20 14:11:49.000000000 +0200
+++ b/debian-edu-fsautoresize	2015-09-25 11:34:51.859501842 +0200
@@ -14,6 +14,7 @@
 
 use Getopt::Std;
 use Sys::Syslog qw(openlog syslog closelog LOG_NOTICE);
+use File::Basename;
 
 # Using this module (instead of Filesys::DiskSpace) to get a version
 # providing the device size, and not only free and used.
@@ -194,6 +195,13 @@
         chomp;
         my @f = split(/\s+/);
         my $device = $f[0];
+        # Always use mapper names instead of kernel ones.
+        if (index ($f[0], "/dev/dm-") != -1) {
+            for my $mapdevice (glob "/dev/mapper/*") {
+                my $dmdevice = basename(readlink $mapdevice) if -l $mapdevice;
+                $device = $mapdevice if defined($dmdevice) && $dmdevice =~ basename($f[0]);
+            }
+        }
         my $mountpoint = $f[1];
         my $typename = $f[2];
         next unless (exists $fsops{$typename});


Wolfgang

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