int zuluCryptUnmountVolume( const char * device,char ** m_point )
{
int h = 3 ;
char * e ;
size_t s ;
stringList_t stl ;
StringListIterator it ;
StringListIterator end ;
ssize_t r ;
string_t st ;
string_t xt ;
if( StringPrefixEqual( device,"/dev/loop" ) ){
/*
* zuluCryptLoopDeviceAddress() is defined in create_loop_device.c
*/
e = zuluCryptLoopDeviceAddress( device ) ;
if( e == NULL ){
return h ;
}else{
stl = _get_mount_entries( e ) ;
StringFree( e ) ;
}
}else{
stl = _get_mount_entries( device ) ;
}
s = StringListSize( stl ) ;
if( s == 0 ){
/*
* volume appear to not be mounted.
*/
}else if( s == 1 ){
/*
* there is only one mount point for the volume,unmount it normally
*/
h = _zuluCryptUnmountVolume_0( StringListStringAtFirstPlace( stl ),m_point ) ;
}else{
/*
* There are multiple mount points for the same volume.
*
* Try to figure out which one among the mount points is ours and then try
* first to unmount the rest of them.
*/
r = StringListHasSequence( stl," /run/media/private/" ) ;
if( r == -1 ){
/*
* Probable reason for getting here is if a user use a home mount point path,
* we dont know the path because we dont know the user we are serving
* and hence we bail out with an error.
*/
h = 10 ;
}else{
/*
* We got our mount point,take it out of the list to use it last
*/
st = StringListDetachAt( stl,r ) ;
StringListGetIterators( stl,&it,&end ) ;
while( it != end ){
xt = *it ;
it++ ;
if( _zuluCryptUnmountVolume_0( xt,NULL ) != 0 ){
/*
* Failed to unmount one of the extra mount points,
* bail out with an error.
*/
h = 10 ;
break ;
}
}
if( h != 10 ){
/*
* Attempt to unmount our mount point last.
*/
h = _zuluCryptUnmountVolume_0( st,m_point ) ;
}
StringDelete( &st ) ;
}
}
if( h != 0 && h != 3 && h != 4 && h != 1 && h != 10 ){
h = 2 ;
}
StringListDelete( &stl ) ;
return h ;
}
int zuluCryptBindMountVolume( const char * device,string_t z_path,unsigned long flags )
{
struct stat st ;
string_t path ;
string_t tmp ;
ssize_t index = StringLastIndexOfChar( z_path,'/' ) ;
const char * o_path = StringContent( z_path ) ;
const char * m_path ;
const char * e ;
int xt ;
stringList_t stl ;
mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IXOTH | S_IROTH ;
if( index == -1 ){
return 1 ;
}
if( device ){;}
zuluCryptSecurityGainElevatedPrivileges() ;
/*
* zuluCryptGetMoutedListFromMountInfo() is defined in ../lib/process_mountinfo.c
*/
stl = zuluCryptGetMoutedListFromMountInfo() ;
path = String( "/run/media/public/" ) ;
m_path = StringAppend( path,o_path + index + 1 ) ;
#define path_does_not_exist( x ) stat( x,&st ) != 0
#define path_does_exist( x ) stat( x,&st ) == 0
if( path_does_not_exist( "/run" ) ){
mkdir( "/run",mode ) ;
_chown( "/run",0,0 ) ;
}
if( path_does_not_exist( "/run/media" ) ){
mkdir( "/run/media",mode ) ;
_chown( "/run/media",0,0 ) ;
}
if( path_does_not_exist( "/run/media/public" ) ){
mkdir( "/run/media/public",mode ) ;
_chown( "/run/media/public",0,0 ) ;
}
if( path_does_exist( m_path ) ){
/*
* bind mount point exists,this will happen if the mount point is already taken or a mount point folder
* was not autodeleted for some reason
*/
tmp = StringCopy( path ) ;
e = StringAppend( tmp," " ) ;
if( StringListHasSequence( stl,e ) != -1 ){
/*
* An attempt is made to bind mount on a path already bind mounted path,dont attempt to mount
*/
xt = 1 ;
}else{
/*
* the mount point folder is there for some reason but is not being used.
*/
xt = mount( o_path,m_path,"",flags|MS_BIND,"" ) ;
}
StringDelete( &tmp ) ;
}else{
mkdir( m_path,S_IRWXU | S_IRWXG | S_IRWXG ) ;
_chown( m_path,0,0 ) ;
xt = mount( o_path,m_path,"",flags|MS_BIND,"" ) ;
if( xt != 0 ){
rmdir( m_path ) ;
}
}
StringListDelete( &stl ) ;
StringDelete( &path ) ;
zuluCryptSecurityDropElevatedPrivileges() ;
return xt ;
}