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// This is a roxen module. Copyright © 2000 - 2009, Roxen IS. 
 
inherit "module"; 
 
constant cvs_version= "$Id: tarfs.pike,v 1.12 2009/05/07 14:15:54 mast Exp $"; 
 
// The Filesystem.Tar module is not threadsafe. 
constant thread_safe=0; 
 
//<locale-token project="mod_tarfs">_</locale-token> 
#define _(X,Y)        _DEF_LOCALE("mod_tarfs",X,Y) 
// end of the locale related stuff 
#include <module.h> 
 
constant module_type = MODULE_LOCATION; 
LocaleString module_name = _(1,"File systems: Tar File"); 
LocaleString module_doc = 
_(2,"This is a file system module that makes it possible to mount a " 
 "directory structure from a tar-file directly on the site. gzip compressed " 
 "tar-files are not supported"); 
constant module_unique = 0; 
 
void create() 
{ 
  defvar( "mountpoint", "/",  
          _(3,"Mount point"), TYPE_LOCATION|VAR_INITIAL, 
          _(4,"Where the module will be mounted in the site's virtual file " 
          "system.") ); 
 
  defvar("tarfile", "docs.tar",  
         _(5,"Tar file and root path"), TYPE_FILE|VAR_INITIAL, 
         _(6,"The tarfile, and an optional root path (syntax: /tar/file.tar:/" 
           "root/dir/)") ); 
} 
 
string mp; 
 
Filesystem.Tar tar; 
 
string query_name() 
{ 
  return query("mountpoint")+" from "+query("tarfile"); 
} 
 
void start() 
{ 
  string path = "", tf = query( "tarfile" ); 
  mp = query("mountpoint"); 
  sscanf( tf, "%s:%s", tf, path ); 
  tar = 0; 
  if( catch(tar = Filesystem.Tar( tf )) ) 
  { 
    report_error( "Failed to open tar-file "+tf+"!\n" ); 
    tar = 0; 
  } 
  else if( strlen( path ) ) 
    tar->cd( path ); 
} 
 
 
string query_location() 
{ 
  return mp; 
} 
 
Stat stat_file( string f, RequestID id ) 
{ 
  if(!tar) return 0; 
  object s = tar->stat( f ); 
  if( s ) 
    return ({ s->mode, s->size, s->atime, s->mtime, s->ctime, s->uid, s->gid }); 
} 
 
string real_file( string f, RequestID id ) 
{ 
  return 0; 
} 
 
array find_dir( string f, RequestID id ) 
{ 
  if(!tar) return 0; 
  return tar->get_dir( f ); 
} 
 
mixed find_file( string f, RequestID id ) 
{ 
  if(!tar) return 0; 
  object s = tar->stat( f ); 
  if( !s ) return 0; 
  if( s->isdir() ) return -1; 
  return StringFile( tar->open( f, "r" )->read(),  
                     stat_file( f, id )); 
}