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Resolve UUID= and LABEL= refs when searching Mount_Info (#162) 

Implemented the second half of the solution described in the previous
commit.  Resolve UUID= and LABEL= references when searching in the
Mount_Info cache so that mount points of encrypted file systems listed
in /etc/fstab can be found using the later added FS_Info details.

Closes #162 - It is no longer possible to mount a LUKS encrypted file
              system
This commit is contained in:
Mike Fleetwood 2021-08-10 21:08:06 +01:00 committed by Curtis Gedak
parent 5bede18e58
commit 49747f656d
2 changed files with 53 additions and 3 deletions
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2
include/Mount_Info.h
View File

@ -66,7 +66,7 @@ private:
MountMapping & map );
static bool have_rootfs_dev( MountMapping & map );
static void read_mountpoints_from_mount_command( MountMapping & map );
static const MountEntry & find( const MountMapping & map, const Glib::ustring & path );
static const MountEntry& find(MountMapping& map, const Glib::ustring& path);
};
} //GParted

54
src/Mount_Info.cc
View File

@ -254,12 +254,62 @@ void Mount_Info::read_mountpoints_from_mount_command( MountMapping & map )
}
}
const MountEntry & Mount_Info::find( const MountMapping & map, const Glib::ustring & path )
const MountEntry& Mount_Info::find(MountMapping& map, const Glib::ustring& path)
{
MountMapping::const_iterator iter_mp = map.find( BlockSpecial( path ) );
BlockSpecial bs_path = BlockSpecial(path);
// 1) Key look up by path. E.g. BlockSpecial("/dev/sda1").
MountMapping::const_iterator iter_mp = map.find(bs_path);
if ( iter_mp != map.end() )
return iter_mp->second;
// 2) Not found so iterate over all mount entries resolving UUID= and LABEL=
// references; checking after each for the requested mount entry.
// (Unresolved UUID= and LABEL= references are added by
// read_mountpoints_from_file("/etc/fstab", fstab_info) for open encryption
// mappings as the file system details are only added later into the FS_Info
// cache by GParted_Core::detect_filesystem_in_encryption_mappings()).
std::vector<BlockSpecial> ref_nodes;
for (iter_mp = map.begin(); iter_mp != map.end(); ++iter_mp)
{
if (iter_mp->first.m_name.compare(0, 5, "UUID=") == 0 ||
iter_mp->first.m_name.compare(0, 6, "LABEL=") == 0 )
{
ref_nodes.push_back(iter_mp->first);
}
}
for (unsigned i = 0; i < ref_nodes.size(); i++)
{
Glib::ustring node;
Glib::ustring uuid = Utils::regexp_label(ref_nodes[i].m_name, "^UUID=(.*)");
if (! uuid.empty())
{
Glib::ustring temp = FS_Info::get_path_by_uuid(uuid);
if (! temp.empty())
node = temp;
}
Glib::ustring label = Utils::regexp_label(ref_nodes[i].m_name, "^LABEL=(.*)");
if (! label.empty())
{
Glib::ustring temp = FS_Info::get_path_by_label(label);
if (! temp.empty())
node = temp;
}
if (! node.empty())
{
// Insert new mount entry and delete the old one.
map[BlockSpecial(node)] = map[ref_nodes[i]];
map.erase(ref_nodes[i]);
if (BlockSpecial(node) == bs_path)
// This resolved mount entry is the one being searched for.
return map[bs_path];
}
}
static MountEntry not_mounted = MountEntry();
return not_mounted;
}