static int _check_if_device_is_supported( int st,uid_t uid,char ** dev )
{
string_t fs ;
if( st == 0 ){
seteuid( 0 ) ;
/*
* zuluCryptGetFileSystemFromDevice() is defined in mount_volume.c
*/
fs = zuluCryptGetFileSystemFromDevice( *dev ) ;
seteuid( uid ) ;
if( fs != StringVoid ){
if( StringHasAtLeastOneComponent( fs,"member","swap",NULL ) ){
st = 100 ;
}
StringDelete( &fs ) ;
}
}else{
/*
* safely do free( *dev ) followed by *dev = NULL
*/
StringFree_1( dev ) ;
}
return st ;
}
int zuluCryptMountVolume( const char * path,const char * m_point,unsigned long mount_opts,const char * fs_opts,uid_t uid )
{
int h ;
string_t opts = StringVoid ;
string_t fs = StringVoid ;
string_t loop = StringVoid ;
int fd = -1 ;
m_struct mst ;
mst.device = path ;
mst.m_point = m_point ;
mst.uid = uid ;
mst.m_flags = mount_opts ;
/*
* zuluCryptGetFileSystemFromDevice() is defined in this source file
*/
fs = zuluCryptGetFileSystemFromDevice( path ) ;
if( fs == StringVoid ){
/*
* failed to read file system,probably because the volume does have any or
* a plain volume was opened with a wrong key
*/
return zuluExit( 4,fd,opts,fs,loop ) ;
}
if( StringStartsWith( fs,"crypto" ) ){
/*
* we cant mount an encrypted volume, exiting
*/
return zuluExit( 4,fd,opts,fs,loop ) ;
}
/*
* zuluCryptMountHasNotAllowedFileSystemOptions() is defined in ./mount_fs_options.c
*/
if( zuluCryptMountHasNotAllowedFileSystemOptions( uid,fs_opts,fs ) ){
return zuluExit( -1,fd,opts,fs,loop ) ;
}
mst.fs_flags = fs_opts ;
mst.fs = StringContent( fs ) ;
opts = set_mount_options( &mst ) ;
if( StringPrefixNotEqual( path,"/dev/" ) ){
/*
* zuluCryptAttachLoopDeviceToFile() is defined in ./create_loop_device.c
*/
if( zuluCryptAttachLoopDeviceToFile( mst.device,O_RDWR,&fd,&loop ) ){
mst.device = StringContent( loop ) ;
}else{
return zuluExit( -1,fd,opts,fs,loop ) ;
}
}
if( zuluCryptFileSystemIsFUSEbased( path ) ){
/*
* These file systems dont see to work with mount() command for some reason.
* Them being FUSE based could be a reason.
*/
switch( mount_FUSEfs( &mst ) ){
case 0 : return zuluExit( 0,fd,opts,fs,loop ) ;
case 16 : return zuluExit( 12,fd,opts,fs,loop ) ;
default : return zuluExit( 1,fd,opts,fs,loop ) ;
}
}else{
h = mount_volume( &mst ) ;
}
return zuluExit( h,fd,opts,fs,loop ) ;
}
