pike.git/lib/modules/Filesystem.pmod/Zip.pmod:1b19b643765dd02991fc8aa72195cab868a9d544

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Filesystem which can be used to mount a ZIP file. //! //! @param filename //! The tar file to mount. //! @param parent //! The parent filesystem. If non is given, the normal system //! filesystem is assumed. This allows mounting a ZIP-file within //! a zipfile. //! @param file //! If specified, this should be an open file descriptor. This object //! could e.g. be a @[Stdio.File] or similar object. Stdio.File fd; // Compression mechanisms constant L_COMP_STORE = 0; constant L_COMP_DEFLATE = 8; constant L_COMP_BZIP2 = 12; typedef int short; typedef int long; //! traditional Zip encryption is CRC32 based, and rather insecure. //! support here exists to ease transition and to work with legacy files. class Decrypt { private array key = ({305419896, 591751049, 878082192}); private array tab = allocate(256); private void create(string pw) { gentab(); foreach(pw;; int ch) { update_keys(ch); } } // populate the crc table private void gentab() { int poly = 0xedb88320; for(int i; i<sizeof(tab); i++) { int crc = i; for(int j = 0; j < 8; j++) { if(crc & 1) crc = ((crc >> 1) & 0x7fffffff) ^ poly; else crc = ((crc >> 1) & 0x7fffffff); } tab[i] = crc; } } // single byte crc private int crc32(int c, int crc) { return ((crc >> 8) & 0xffffff) ^ tab[(crc ^ c) & 0xff]; } private void update_keys(int ch) { key[0] = crc32(ch, key[0]); key[1] = (key[1] + (key[0] & 255)) & 0xffffffff; key[1] = ((key[1] * 134775813) + 1) & 0xffffffff; key[2] = crc32((key[1] >> 24) & 255, key[2]); } private int decrypt_char(int c) { int k = key[2] | 2; c = c ^ (((k * (k^1)) >> 8) & 255); update_keys(c); return c; } //! decrypt a string //! //! @param x //! encrypted string to decrypt string decrypt(string x) { String.Buffer buf = String.Buffer(); foreach(x;; int c) buf->putchar(decrypt_char(c)); return buf->get(); } } //! A class for reading and writing ZIP files. //! //! Note that this class does not support the full ZIP format //! specification, but does support the most common features. //! //! Storing, Deflating and Bzip2 (if the Bz2 module is available) are //! supported storage methods. //! //! This class is able to extract data from traditional ZIP password //! encrypted archives. //! //! Notably, advanced PKware encryption (beyond reading traditional //! password protected archives) and multi-part archives are not //! currently supported. class _Zip { object fd; string filename; int use_zip64; int use_bzip2; protected string password; array entries = ({}); int compression_value = 6; //! sets the compression value (0 to 9) void set_compression_value(int(0..9) v) { compression_value = v; } //! sets the password to be used for files encrypted using traditional //! PKZip encryption. void set_password(string pw) { password = pw; } //! enable zip64 extensions (large files) for this archive //! //! @note //! This setting may be used to force zip64 for files that do not //! otherwise require its use. If a file whose properties requires //! the use of zip65 is added to an archive, zip64 extensions will //! be enabled automatically. void set_zip64(int flag) { use_zip64 = flag; } //! is this archive using zip64 extensions? int is_zip64() { return use_zip64; } class CentralRecord { inherit Filesystem.Stat; constant this_size = 4*6 + 11*2; long signature; short version_made_by; short ver_2_extract; short general_flags; short comp_method; short date; short time; long crc32; long comp_size; long uncomp_size; short filename_len; short extra_len; short comment_len; short start_disk; short int_file_attr; long ext_file_attr; long local_offset; string filename; string extra; string comment; protected void create() { sscanf( fd->read( this_size ), "%-4c" + "%-2c"*6 + "%-4c"*3 + "%-2c"*5 + "%-4c"*2, signature, version_made_by, ver_2_extract, general_flags, comp_method, date, time, crc32, comp_size, uncomp_size, filename_len, extra_len, comment_len, start_disk, int_file_attr, ext_file_attr, local_offset ); filename = fd->read( filename_len ); extra = fd->read( extra_len ); parse_extra(extra); object fds; if(fd) fds = fd->stat(); if(!uid && fds) uid = fds->uid; if(!gid && fds) gid = fds->gid; if(filename[-1] == '/') { // if the extra field doesn't specify the mode, we fake it by // using the parent file's. note that we need to figure out a // special dispensation for directories in this case. if(!mode && fds) { mode = fds->mode; mode |= (!!(mode&256) << 6); mode |= (!!(mode&32) << 3); mode |= (!!(mode&4) << 0); } set_type("dir"); filename = filename[..<1]; } else { if(!mode && fds) mode = fds->mode; set_type("reg"); } name = (filename/"/")[-1]; fullpath = filename; comment = fd->read( comment_len ); filename = replace( filename, "\\", "/" ); if( filename_len ) while( filename[0] == '/' ) filename = filename[1..]; mtime = date_dos2unix(date, time); atime = ctime = mtime; size = uncomp_size; central_records[(filename)] = this; } LocalFileRecord local_record; LocalFileRecord open() { if( !local_record ) local_record = LocalFileRecord( local_offset, this ); return local_record; } void parse_extra(string extra) { int id, len; string val; while(sizeof(extra)) { sscanf(extra, "%-2c%-2c%s", id, len, extra); if(len) sscanf(extra, "%" + len + "s%s", val, extra); string rest; int ver; switch(id) { case 0x0001: // ZIP64 sscanf(val, "%-8c%-8c%-8c%-4c", uncomp_size, comp_size, local_offset, start_disk); break; case 0x000d: // UNIX extension // unix sscanf(val, "%-4c%-4c%-2c%-2c", atime, mtime, uid, gid); break; case 0x5455: // Extended Timestamp extension int info; sscanf(val, "%-1c%-4c", info, mtime); break; case 0x7075: // UTF8 Name extension int crc; sscanf(val, "%-1c%-4c%s", ver, crc, rest); filename = utf8_to_string(rest); case 0x7875: // New UNIX extension // unix int l; sscanf(val, "%-1c%-1c%s", ver, l, val); if(ver != 1) break; sscanf(val, "%-" +l + "c%-1c%s", uid, l, val); sscanf(val, "%-" +l + "c%-1c%s", gid, l, val); break; } } } } // end central record /* local file header signature 4 bytes (0x04034b50) version needed to extract 2 bytes general purpose bit flag 2 bytes compression method 2 bytes last mod file time 2 bytes last mod file date 2 bytes crc-32 4 bytes compressed size 4 bytes uncompressed size 4 bytes file name length 2 bytes extra field length 2 bytes file name (variable size) extra field (variable size) */ class LocalFileRecord { inherit Filesystem.Stat; constant this_size = 4*4 + 7*2; long signature; //< local file header signature 4 bytes (0x04034b50) short ver_2_extract; //< version needed to extract short general_flags; //< general purpose bit flag short comp_method; //< compression method short date; //< last mod file time short time; //< last mod file date long crc32; //< crc-32 long comp_size; //< compressed size long uncomp_size; //< uncompressed size short filename_len; //< file name length short extra_len; //< extra field length string filename; string extra; string comment; long data_offset; object _fd; protected string _sprintf(mixed t) { return "LocalFileRecord(" + filename + ")"; } protected void create(int | mapping entry, object|void central_record) { if(mappingp(entry)) populate(entry); else decode(entry, central_record); } // // entry keys // no_compress // bzip // data // stat // filename // stamp void populate(mapping entry) { signature = 0x04034b50; general_flags = 0; comp_method = ((!entry->data||entry->no_compress)?L_COMP_STORE:(entry->bzip2?L_COMP_BZIP2:L_COMP_DEFLATE)); // deflate if(entry->bzip2) use_bzip2 = 1; if(!entry->stat && objectp(entry->data)) entry->stat = entry->data->stat(); if(entry->stat) attach_statobject(entry->stat); // it appears that files are stored in utc without tz info if(size > 0xffffffff) use_zip64 = 1; filename = entry->filename; if(!entry->data) ; else if(objectp(entry->data)) _fd = entry->data; else _fd = Stdio.FakeFile(entry->data); if(entry->stamp) mtime = entry->stamp; [time, date] = date_unix2dos(mtime - Calendar.Second(mtime)->utc_offset()); if(comp_method == L_COMP_BZIP2) ver_2_extract = 46; else if(use_zip64) ver_2_extract = 45; else ver_2_extract = 2; } string encode_central_record(int offset) { encode_extra(offset); return sprintf( "%-4c" + "%-c%-c"+ "%-2c"*5 + "%-4c"*3 + "%-2c"*5 + "%-4c"*2, 0x02014b50, 3 /* UNIX */, ver_2_extract, ver_2_extract, general_flags, comp_method, time, date, crc32, (use_zip64?0xffffffff:comp_size), (use_zip64?0xffffffff:uncomp_size), filename?sizeof(filename):0, extra?sizeof(extra):0, comment?sizeof(comment):0, 0/*start_disk*/, 0/*int_file_attr*/, 0/*ext_file_attr*/, (use_zip64?0xffffffff:offset)) + (filename?filename:"") + (extra?extra:"") + (comment?comment:""); } string encode() { string cdata; string ucdata; if(_fd) { ucdata = _fd->read(0x7fffffff); uncomp_size += sizeof(ucdata||""); crc32 = Gz.crc32(ucdata, crc32); if(ucdata) cdata = write(ucdata); comp_size = sizeof(cdata||""); } encode_extra(-1); string ret = sprintf( "%-4c" + "%-2c"*5 + "%-4c"*5 + "%-2c"*2, signature, ver_2_extract, general_flags, comp_method, time, date, crc32, comp_size, uncomp_size, (use_zip64?0xffffffff:comp_size), (use_zip64?0xffffffff:uncomp_size), filename?sizeof(filename):0, extra?sizeof(extra):0 ); if(filename) ret += ( filename ); if(extra) ret += ( extra ); data_offset = sizeof(ret); return ret + (cdata||""); } void encode_extra(int|void offset) { string field; extra = ""; // 0x7075 UTF-8 filename field = string_to_utf8(filename); field = sprintf("%-1c%-4c%s", 1, Gz.crc32(field), field); extra += sprintf("%-2c%-2c%s", 0x7075, sizeof(field), field); // 0x000d UNIX string unixdata = ""; unixdata = sprintf(("%-4c" * 2) + ("%-2c" * 2), atime, mtime, uid, gid); extra += sprintf("%-2c%-2c%s", 0x000d, sizeof(unixdata), unixdata); // 0x7875 New UNIX unixdata = sprintf("%-1c%-1c%-" + get_int_size(uid) + "c%-1c%-" + get_int_size(gid) + "c", 1, get_int_size(uid), uid, get_int_size(gid), gid); extra += sprintf("%-2c%-2c%s", 0x7875, sizeof(unixdata), unixdata); // 0x5455 extended timestamp unixdata = sprintf("%-1c%-4c", 0, mtime); extra += sprintf("%-2c%-2c%s", 0x5455, sizeof(unixdata), unixdata); if(use_zip64 && offset != -1) { unixdata = sprintf("%-8c%-8c%-8c%-4c", uncomp_size, comp_size, offset, 0 /* disk start */); extra += sprintf("%-2c%-2c%s", 0x0001, sizeof(unixdata), unixdata); } } int get_int_size(int val) { if (val < 0xffff) { if (val < 0xff) return 1; // 8 bit else return 2;// 16 bit } else { if (val < 0xffffffff) return 4;// 32 bit else return 8;// 64 bit } } int get_data_length() { return data_offset + comp_size; } void decode( int offset, object|void central_record ) { fd->seek( offset ); sscanf( fd->read( this_size ), "%-4c" + "%-2c"*5 + "%-4c"*3 + "%-2c"*2, signature, ver_2_extract, general_flags, comp_method, date, time, crc32, comp_size, uncomp_size, filename_len, extra_len ); filename = fd->read( filename_len ); if(filename[-1] == '/') set_type("dir"); extra = fd->read( extra_len ); parse_extra(extra); if( offset+filename_len+extra_len+this_size != fd->tell() ) error("Truncated ZIP\n"); data_offset = fd->tell(); if(general_flags & 0x08) { // lengths were not available at header creation. use central record. crc32 = central_record->crc32; uncomp_size = central_record->uncomp_size; comp_size = central_record->comp_size; } if(general_flags >> 11 & 0x01) { // utf-8 encoded filename. filename = utf8_to_string(filename); } } void parse_extra(string extra) { int id, len; string val; while(sizeof(extra)) { sscanf(extra, "%-2c%-2c%s", id, len, extra); if(len) sscanf(extra, "%" + len + "s%s", val, extra); string rest; int ver; switch(id) { case 0x000d: // UNIX extension // unix sscanf(val, "%-4c%-4c%-2c%-2c", atime, mtime, uid, gid); break; case 0x5455: // Extended Timestamp extension int info; sscanf(val, "%-1c%-4c", info, mtime); break; case 0x7075: // UTF8 Name extension int crc; sscanf(rest, "%-1c%-4c%s", ver, crc, rest); filename = utf8_to_string(rest); case 0x7875: // New UNIX extension // unix int l; sscanf(val, "%-1c%-1c%s", ver, l, rest); if(ver != 1) break; sscanf(rest, "%-" +l + "c%-1c%s", uid, l, rest); sscanf(rest, "%-" +l + "c%-1c%s", gid, l, rest); break; } } } string write(string data) { switch(comp_method) { case L_COMP_STORE: return data; #if constant(Bz2.Inflate) case L_COMP_BZIP2: return Bz2.Deflate()->deflate(data); #endif case L_COMP_DEFLATE: return Gz.deflate(0-compression_value)->deflate(data); default: throw(Error.Generic("Unknown compression type " + comp_method + ".\n")); } } string read() { int check; string data; data = low_read(); check = (Gz.crc32(data) & 0xffffffff); if(check != crc32) { throw(Error.Generic(sprintf("Bad CRC for file %O: expected %x, got %x.\n", filename, crc32, check))); } return data; } string low_read() { int check; fd->seek( data_offset ); string data = fd->read( comp_size ); if(general_flags & 0x1) { if(!password) throw(Error.Generic("File encrypted, but no password supplied.\n")); object d = Decrypt(password); string head; sscanf(data, "%12s%s", head, data); head = d->decrypt(head); if(general_flags & 0x08) // if streaming, use high byte of date { check = (date >> 8) & 0xff; } else { check = (crc32 >> 24) & 0xff; } if(check != head[-1]) { throw(Error.Generic("Invalid password supplied.\n")); } data = d->decrypt(data); } switch( comp_method ) { case L_COMP_STORE: return data; #if constant(Bz2.Inflate) case L_COMP_BZIP2: return Bz2.Inflate()->inflate(data); #endif case L_COMP_DEFLATE: return Gz.inflate()->inflate( sprintf("%1c%1c", 8, ((310-8)<<8)%31) + data ); default: error(sprintf("Unsupported compression method: %d\n", comp_method)); } } } class EndRecord64 { /* Zip64 end of central directory record zip64 end of central dir signature 4 bytes (0x06064b50) size of zip64 end of central directory record 8 bytes version made by 2 bytes version needed to extract 2 bytes number of this disk 4 bytes number of the disk with the start of the central directory 4 bytes total number of entries in the central directory on this disk 8 bytes total number of entries in the central directory 8 bytes size of the central directory 8 bytes offset of start of central directory with respect to the starting disk number 8 bytes zip64 extensible data sector (variable size) */ constant this_size = 12; // the size of the header only. int signature; int version_made_by; int version_2_ext; int this_disk; int central_start_disk; int entries_here; int file_count; int central_size; int central_start_offset; string extra; protected void create(int offset) { int full_size; int i; fd->seek( offset ); string data = fd->read( 4 ); sscanf(data, "%-4c", signature ); if( signature != 0x06064b50 ) error("Could not find Zip64 EndDirectory record\n"); fd->seek( offset ); sscanf( fd->read(this_size), ("%-4c%-8c"), signature, full_size); sscanf(fd->read(full_size), "%-2c"*2 + "%-4c"*2 + ("%-8c"*4) + "%s", version_made_by, version_2_ext, this_disk, central_start_disk, entries_here, file_count, central_size, central_start_offset, extra ); if( (this_disk != central_start_disk) ) error("Could not find Zip-file index\n"); fd->seek( central_start_offset ); for( i = 0; i<file_count; i++ ) { CentralRecord( ); } } } // EndRecord64 end; class EndRecordLocator64 { /* Zip64 end of central directory locator zip64 end of central dir locator signature 4 bytes (0x07064b50) number of the disk with the start of the zip64 end of central directory 4 bytes relative offset of the zip64 end of central directory record 8 bytes total number of disks 4 bytes */ constant this_size = 20; // the size of the header only. int signature; int central_end_disk; int central_end_offset; int disk_count; protected void create(int from) { int i; for( i = from-this_size; i > from-50; i-- ) { fd->seek( i ); string data = fd->read( 4 ); sscanf( data, "%-4c", signature ); if( signature == 0x07064b50 ) { use_zip64 = 1; break; } } if(!use_zip64) return; use_zip64 = 1; fd->seek( i ); sscanf( fd->read(this_size), ("%-4c%-4c%-8c%-4c"), signature, central_end_disk, central_end_offset, disk_count); // if( (this_disk != central_end_disk) ) // error("Could not find Zip-file index\n"); EndRecord64(central_end_offset); } } // EndRecordLocator64 end; /* End of central directory record end of central dir signature 4 bytes (0x06054b50) number of this disk 2 bytes number of the disk with the start of the central directory 2 bytes total number of entries in the central directory on this disk 2 bytes total number of entries in the central directory 2 bytes size of the central directory 4 bytes offset of start of central directory with respect to the starting disk number 4 bytes .ZIP file comment length 2 bytes .ZIP file comment (variable size) */ class EndRecord { long signature; short this_disk; short central_start_disk; short entries_here; short file_count; long central_size; long central_start_offset; short comment_len; constant this_size = (6 * 2) + (3 * 4); protected void create() { int i; for( i = -10; i>-(0xffff+23); i-- ) { fd->seek( i ); string data = fd->read( 4 ); sscanf( data, "%-4c", signature ); if( signature == 0x06054b50 ) break; } if( i < -50000 ) error("Could not find Zip-file index\n"); fd->seek( i ); sscanf( fd->read(this_size), ("%-4c" + "%-2c"*4 + "%-4c"*2 + "%-2c"), signature, this_disk, central_start_disk, entries_here, file_count, central_size, central_start_offset, comment_len ); if( (this_disk != central_start_disk) ) error("Could not find Zip-file index\n"); EndRecordLocator64(i); if(!use_zip64) { fd->seek( central_start_offset ); for( i = 0; i<file_count; i++ ) CentralRecord(); } } } // EndRecord end; mapping central_records = ([]); string read_flat( string file ) { return read( "\0"+file ); } string read( string file ) { file = lower_case( file ); while( strlen(file) && file[0] == '/' ) file = file[1..]; if( central_records[file] ) return central_records[file]->open()->read(); } array(string) get_dir_flat() { array res = ({}); foreach( central_records; string d; object rec ) { if( sizeof(d) && !d[0] ) res += ({ d[1..] }); } return res; } array(string) get_dir( string base ) { base = lower_case( base ); while( sizeof(base) && base[0] == '/' ) base = base[1..]; if( sizeof(base) && base[-1] != '/' ) base += "/"; mapping res = ([]); foreach( central_records; string d; object rec ) { if( strlen(d) && d[0] && sscanf( d, base+"%[^/]/", d ) ) res[d] = 1; } return indices(res); } //! protected void create(object|void fd, string|void filename, object|void parent) { this_program::filename = filename; this_program::fd = fd; if(!fd) return; // trigger parsing of the zip file EndRecord(); } //! void unzip(string todir) { string start = ""; low_unzip(start, todir); } protected void low_unzip(string start, string todir) { foreach(get_dir(start);; string fn) { string rfn = combine_path(start, fn); string s; if(sizeof(rfn) && (rfn[-1] == '/')) continue; else if(s = read(rfn)) { Stdio.write_file(combine_path(todir, rfn), s); } else { if(rfn[-1] == '/') rfn = rfn[0..sizeof(rfn)-2]; mkdir(combine_path(todir, rfn)); low_unzip(rfn, todir); } } } //! generate the zip archive string generate() { int offset = 0; int cdstart; int cdlength; String.Buffer buf = String.Buffer(); if(sizeof(entries) > 65535) use_zip64 = 1; foreach(entries;; object entry) { buf += entry->encode(); } cdstart = sizeof(buf); foreach(entries;; object entry) { buf += entry->encode_central_record(offset); offset += entry->get_data_length(); } cdlength = sizeof(buf) - cdstart; if(use_zip64) { int record_start = sizeof(buf); buf += encode_end_record64(cdlength, cdstart); buf += encode_end_record_locator64(record_start); } cdlength = sizeof(buf) - cdstart; buf += encode_end_record(cdlength, cdstart); return buf->get(); } protected string encode_end_record_locator64(int start) { return sprintf("%-4c%-4c%-8c%-4c", 0x07064b50, 0, start, 0); } protected string encode_end_record64(int cdlength, int cdstart) { string data = sprintf( "%-c%-c%-2c" + "%-4c"*2 + "%-8c"*4, 45, 3, (use_bzip2?46:(use_zip64?45:2)), 0, 0, // NB this might be wrong sizeof(entries), sizeof(entries), cdlength, cdstart ); return sprintf("%-4c%-8c%s", 0x06064b50, sizeof(data), data); } protected string encode_end_record(int central_size, int central_start_offset, string|void comment) { return sprintf (("%-4c" + "%-2c"*4 + "%-4c"*2 + "%-2c"), 0x06054b50, 0, 0, sizeof(entries), sizeof(entries), central_size, central_start_offset, (comment?sizeof(comment):0) ) + (comment?comment:""); } //! adds a directory to an archive void add_dir(string path, int recurse, string|void archiveroot) { object i=Filesystem.System(path); object stat = file_stat(path); if(!archiveroot) archiveroot = ""; low_add_dir(i, archiveroot, recurse, stat); } protected void low_add_dir(object i, string current_dir, int recurse, object stat) { add_file(current_dir + "/", 0, stat); foreach(i->get_dir();; string fn) { if(i->stat(fn)->isdir) { if(recurse) low_add_dir(i->cd(fn), current_dir + "/" + fn, recurse, i->stat(fn)); } else { add_file(current_dir + "/" + fn, i->open(fn, "r")); } } } //! add a file to an archive. //! void add_file(string filename, string|Stdio.File data, int|object|void stamp, int|void no_compress) { mapping entry = ([]); entry->filename = filename; entry->data = data; if(objectp(stamp)) entry->stat = stamp; else entry->stamp = stamp; entry->no_compress = no_compress; entries += ({LocalFileRecord(entry)}); } // http://www.koders.com/cpp/fid254A78DD4D45BF598B2ACD5FA6C522D08D34F87F.aspx // Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). /* Linear day numbers of the respective 1sts in non-leap years. */ constant day_n = ({ 0,31,59,90,120,151,181,212,243,273,304,334,0,0,0,0 }); /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */ //! Convert MS-DOS time/date pair to a linear UNIX date. int date_dos2unix(int time,int date) { int month,year,secs; month = ((date >> 5) & 15)-1; year = date >> 9; secs = (time & 31)*2+60*((time >> 5) & 63)+(time >> 11)*3600+86400* ((date & 31)-1+day_n[month]+(year/4)+year*365-((year & 3) == 0 && month < 2 ? 1 : 0)+3653); /* days since 1.1.70 plus 80's leap day */ return secs; } //! Convert linear UNIX date to a MS-DOS time/date pair. //! @returns //! an array containing ({time, date}) array date_unix2dos(int unix_date) { int date, time; int day,year,nl_day,month; time = (unix_date % 60)/2+(((unix_date/60) % 60) << 5)+ (((unix_date/3600) % 24) << 11); day = unix_date/86400-3652; year = day/365; if ((year+3)/4+365*year > day) year--; day -= (year+3)/4+365*year; if (day == 59 && !(year & 3)) { nl_day = day; month = 2; } else { nl_day = (year & 3) || day <= 59 ? day : day-1; for (month = 0; month < 12; month++) if (day_n[month] > nl_day) break; } date = nl_day-day_n[month-1]+1+(month << 5)+(year << 9); return ({time,date}); } } // End class _Zip class _ZipFS { inherit Filesystem.System; _Zip zip; protected void create(_Zip _zip, string _wd, string _root, Filesystem.Base _parent) { zip = _zip; sscanf(reverse(_wd), "%*[\\/]%s", wd); wd = reverse(wd); if(wd=="") wd = "/"; sscanf(_root, "%*[/]%s", root); parent = _parent; } //! void set_password(string pw) { zip->set_password(pw); } protected string _sprintf(int t) { return t=='O' && sprintf("_ZipFS(/* root=%O, wd=%O */)", root, wd); } Filesystem.Stat stat(string file, void|int lstat) { string d; d = combine_path_unix(wd, file); if(d[0] == '/') d = d[1..]; return zip->central_records[d]; } array(string) get_dir(void|string directory, void|string|array globs) { string d; directory = combine_path_unix(wd, (directory||""), ""); d = root+directory; if(d[0] == '/') d = d[1..]; array f = glob(d+"?*", indices(zip->central_records)); f -= glob(d+"*/?*", f); // stay here foreach(f;int x; string fn) { if(fn[-1] == '/') f[x] = (fn/"/")[-2]; else f[x] = (fn/"/")[-1]; } return f; } Filesystem.Base cd(string directory) { Filesystem.Stat st = stat(directory); if(!st) return 0; if(st->isdir) // stay in this filesystem { object new = _ZipFS(zip, st->fullpath, root, parent); return new; } return st->cd(); // try something else } Stdio.File open(string filename, string mode) { string d; d = combine_path_unix(wd, filename); if(d[0] == '/') d = d[1..]; return zip->central_records[d] && Stdio.FakeFile(zip->central_records[d]->open(mode)->read()); } int access(string filename, string mode) { return 1; // sure } int rm(string filename) { } void chmod(string filename, int|string mode) { } void chown(string filename, int|object owner, int|object group) { } } class `() { inherit _ZipFS; protected void create(string|object filename, void|Filesystem.Base parent, void|object f) { if(!parent) parent = Filesystem.System(); object fd; if(f) fd = f; else fd = parent->open(filename, "r"); if(!fd) error("Not a Zip file\n"); _Zip zip = _Zip(fd, filename, this); _ZipFS::create(zip, "/", "", parent); } protected string _sprintf(int t) { return t=='O' && sprintf("Filesystem.zip(/* zip->filename=%O, root=%O, wd=%O */)", zip && zip->filename, root, wd); } }

pike.git/ lib/ modules/ Filesystem.pmod/ Zip.pmod > 1b19b643765dd02991fc8aa72195cab868a9d544 [Annotate]