740 lines
16 KiB
C++
740 lines
16 KiB
C++
#include "finder_info_helper.h"
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#include <stdint.h>
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#include <string.h>
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#include <ctype.h>
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#include <string>
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#include <unistd.h>
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#include <fcntl.h>
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#if defined(__APPLE__)
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#include <sys/xattr.h>
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#endif
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#if defined(__linux__)
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#include <sys/xattr.h>
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#define XATTR_FINDERINFO_NAME "user.com.apple.FinderInfo"
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#define XATTR_RESOURCEFORK_NAME "user.com.apple.ResourceFork"
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#endif
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#if defined(__FreeBSD__)
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#include <sys/types.h>
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#include <sys/extattr.h>
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#endif
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#if defined(_AIX)
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#include <sys/ea.h>
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#endif
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#if defined (_WIN32)
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#include <windows.h>
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#define XATTR_FINDERINFO_NAME "AFP_AfpInfo"
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#endif
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#ifndef XATTR_FINDERINFO_NAME
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#define XATTR_FINDERINFO_NAME "com.apple.FinderInfo"
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#endif
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#if defined(_WIN32)
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#define _prodos_file_type _afp.prodos_file_type
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#define _prodos_aux_type _afp.prodos_aux_type
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#define _finder_info _afp.finder_info
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#endif
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namespace {
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/*
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tech note PT515
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ProDOS -> Macintosh conversion
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ProDOS Macintosh
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Filetype Auxtype Creator Filetype
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$00 $0000 'pdos' 'BINA'
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$B0 (SRC) (any) 'pdos' 'TEXT'
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$04 (TXT) $0000 'pdos' 'TEXT'
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$FF (SYS) (any) 'pdos' 'PSYS'
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$B3 (S16) (any) 'pdos' 'PS16'
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$uv $wxyz 'pdos' 'p' $uv $wx $yz
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Programmer's Reference for System 6.0:
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ProDOS Macintosh
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File Type Auxiliary Type Creator Type File Type
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$00 $0000 'pdos' 'BINA'
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$04 (TXT) $0000 'pdos' 'TEXT'
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$FF (SYS) (any) 'pdos' 'PSYS'
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$B3 (S16) $DByz 'pdos' 'p' $B3 $DB $yz
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$B3 (S16) (any) 'pdos' 'PS16'
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$D7 $0000 'pdos' 'MIDI'
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$D8 $0000 'pdos' 'AIFF'
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$D8 $0001 'pdos' 'AIFC'
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$E0 $0005 'dCpy' 'dImg'
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$FF (SYS) (any) 'pdos' 'PSYS'
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$uv $wxyz 'pdos' 'p' $uv $wx $yz
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mpw standard:
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$uv (any) "pdos" printf("%02x ",$uv)
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*/
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int hex(uint8_t c)
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{
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if (c >= '0' && c <= '9') return c - '0';
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if (c >= 'a' && c <= 'f') return c + 10 - 'a';
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if (c >= 'A' && c <= 'F') return c + 10 - 'A';
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return 0;
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}
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bool finder_info_to_filetype(const uint8_t *buffer, uint16_t *file_type, uint32_t *aux_type) {
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if (!memcmp("pdos", buffer + 4, 4))
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{
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if (buffer[0] == 'p') {
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*file_type = buffer[1];
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*aux_type = (buffer[2] << 8) | buffer[3];
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return true;
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}
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if (!memcmp("PSYS", buffer, 4)) {
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*file_type = 0xff;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("PS16", buffer, 4)) {
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*file_type = 0xb3;
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*aux_type = 0x0000;
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return true;
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}
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// old mpw method for encoding.
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if (!isxdigit(buffer[0]) && isxdigit(buffer[1]) && buffer[2] == ' ' && buffer[3] == ' ')
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{
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*file_type = (hex(buffer[0]) << 8) | hex(buffer[1]);
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*aux_type = 0;
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return true;
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}
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}
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if (!memcmp("TEXT", buffer, 4)) {
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*file_type = 0x04;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("BINA", buffer, 4)) {
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*file_type = 0x00;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("dImgdCpy", buffer, 8)) {
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*file_type = 0xe0;
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*aux_type = 0x0005;
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return true;
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}
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if (!memcmp("MIDI", buffer, 4)) {
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*file_type = 0xd7;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("AIFF", buffer, 4)) {
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*file_type = 0xd8;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("AIFC", buffer, 4)) {
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*file_type = 0xd8;
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*aux_type = 0x0001;
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return true;
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}
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return false;
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}
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bool file_type_to_finder_info(uint8_t *buffer, uint16_t file_type, uint32_t aux_type) {
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if (file_type > 0xff || aux_type > 0xffff) return false;
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if (!file_type && aux_type == 0x0000) {
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memcpy(buffer, "BINApdos", 8);
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return true;
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}
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if (file_type == 0x04 && aux_type == 0x0000) {
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memcpy(buffer, "TEXTpdos", 8);
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return true;
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}
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if (file_type == 0xff && aux_type == 0x0000) {
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memcpy(buffer, "PSYSpdos", 8);
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return true;
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}
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if (file_type == 0xb3 && aux_type == 0x0000) {
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memcpy(buffer, "PS16pdos", 8);
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return true;
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}
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if (file_type == 0xd7 && aux_type == 0x0000) {
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memcpy(buffer, "MIDIpdos", 8);
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return true;
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}
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if (file_type == 0xd8 && aux_type == 0x0000) {
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memcpy(buffer, "AIFFpdos", 8);
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return true;
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}
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if (file_type == 0xd8 && aux_type == 0x0001) {
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memcpy(buffer, "AIFCpdos", 8);
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return true;
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}
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if (file_type == 0xe0 && aux_type == 0x0005) {
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memcpy(buffer, "dImgdCpy", 8);
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return true;
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}
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memcpy(buffer, "p pdos", 8);
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buffer[1] = (file_type) & 0xff;
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buffer[2] = (aux_type >> 8) & 0xff;
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buffer[3] = (aux_type) & 0xff;
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return true;
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}
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template<class T>
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T _(const T t, std::error_code &ec) {
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if (t < 0) ec = std::error_code(errno, std::generic_category());
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return t;
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}
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/*
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* extended attributes functions.
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*/
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#if defined(__APPLE__)
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ssize_t size_xattr(int fd, const char *xattr) {
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return fgetxattr(fd, xattr, NULL, 0, 0, 0);
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}
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ssize_t read_xattr(int fd, const char *xattr, void *buffer, size_t size) {
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return fgetxattr(fd, xattr, buffer, size, 0, 0);
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}
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ssize_t write_xattr(int fd, const char *xattr, const void *buffer, size_t size) {
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if (fsetxattr(fd, xattr, buffer, size, 0, 0) < 0) return -1;
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return size;
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}
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int remove_xattr(int fd, const char *xattr) {
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return fremovexattr(fd, xattr, 0);
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}
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#elif defined(__linux__)
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ssize_t size_xattr(int fd, const char *xattr) {
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return fgetxattr(fd, xattr, NULL, 0);
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}
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ssize_t read_xattr(int fd, const char *xattr, void *buffer, size_t size) {
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return fgetxattr(fd, xattr, buffer, size);
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}
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ssize_t write_xattr(int fd, const char *xattr, const void *buffer, size_t size) {
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if (fsetxattr(fd, xattr, buffer, size, 0) < 0) return -1;
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return size;
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}
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int remove_xattr(int fd, const char *xattr) {
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return fremovexattr(fd, xattr);
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}
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#elif defined(__FreeBSD__)
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ssize_t size_xattr(int fd, const char *xattr) {
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return extattr_get_fd(fd, EXTATTR_NAMESPACE_USER, xattr, NULL, 0);
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}
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ssize_t read_xattr(int fd, const char *xattr, void *buffer, size_t size) {
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return extattr_get_fd(fd, EXTATTR_NAMESPACE_USER, xattr, buffer, size);
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}
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ssize_t write_xattr(int fd, const char *xattr, const void *buffer, size_t size) {
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return extattr_set_fd(fd, EXTATTR_NAMESPACE_USER, xattr, buffer, size);
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}
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int remove_xattr(int fd, const char *xattr) {
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return extattr_delete_fd(fd, EXTATTR_NAMESPACE_USER, xattr);
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}
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#elif defined(_AIX)
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ssize_t size_xattr(int fd, const char *xattr) {
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/*
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struct stat64x st;
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if (fstatea(fd, xattr, &st) < 0) return -1;
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return st.st_size;
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*/
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return fgetea(fd, xattr, NULL, 0);
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}
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ssize_t read_xattr(int fd, const char *xattr, void *buffer, size_t size) {
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return fgetea(fd, xattr, buffer, size);
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}
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ssize_t write_xattr(int fd, const char *xattr, const void *buffer, size_t size) {
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if (fsetea(fd, xattr, buffer, size, 0) < 0) return -1;
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return size;
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}
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int remove_xattr(int fd, const char *xattr) {
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return fremoveea(fd, xattr);
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}
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#endif
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void set_or_throw_error(std::error_code *ec, int error, const std::string &what) {
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if (ec) *ec = std::error_code(error, std::system_category());
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else throw std::system_error(error, std::system_category(), what);
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}
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#if defined(_WIN32)
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/*
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* allocating a new string could reset GetLastError() to 0.
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*/
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void set_or_throw_error(std::error_code *ec, const char *what) {
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auto e = GetLastError();
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set_or_throw_error(ec, e, what);
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}
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void set_or_throw_error(std::error_code *ec, const std::string &what) {
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auto e = GetLastError();
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set_or_throw_error(ec, e, what);
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}
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template<class ...Args>
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HANDLE CreateFileX(const std::string &s, Args... args) {
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return CreateFileA(s.c_str(), std::forward<Args>(args)...);
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}
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template<class ...Args>
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HANDLE CreateFileX(const std::wstring &s, Args... args) {
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return CreateFileW(s.c_str(), std::forward<Args>(args)...);
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}
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void fi_close(void *fd) {
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CloseHandle(fd);
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}
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void *fi_open(const std::string &path, int perm, std::error_code &ec) {
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ec.clear();
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std::string s(path);
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s.append(":" XATTR_FINDERINFO_NAME);
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HANDLE fh;
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bool ro = perm == 1;
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fh = CreateFileX(s,
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ro ? GENERIC_READ : GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ,
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nullptr,
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ro ? OPEN_EXISTING : OPEN_ALWAYS,
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ro ? FILE_ATTRIBUTE_READONLY : FILE_ATTRIBUTE_NORMAL,
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nullptr);
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if (fh == INVALID_HANDLE_VALUE)
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set_or_throw_error(&ec, "CreateFile");
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return fh;
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}
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void *fi_open(const std::wstring &path, int perm, std::error_code &ec) {
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ec.clear();
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std::wstring s(path);
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s.append(L":" XATTR_FINDERINFO_NAME);
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HANDLE fh;
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bool ro = perm == 1;
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fh = CreateFileX(s,
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ro ? GENERIC_READ : GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ,
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nullptr,
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ro ? OPEN_EXISTING : OPEN_ALWAYS,
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ro ? FILE_ATTRIBUTE_READONLY : FILE_ATTRIBUTE_NORMAL,
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nullptr);
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if (fh == INVALID_HANDLE_VALUE)
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set_or_throw_error(&ec, "CreateFile");
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return fh;
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}
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int fi_write(void *handle, const void *data, int length, std::error_code &ec) {
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ec.clear();
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DWORD rv = 0;
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BOOL ok;
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LARGE_INTEGER zero = { 0 };
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ok = SetFilePointerEx(handle, zero, nullptr, FILE_BEGIN);
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if (!ok) {
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set_or_throw_error(&ec, "SetFilePointerEx");
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return 0;
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}
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ok = WriteFile(handle, data, length, &rv, nullptr);
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if (!ok) {
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set_or_throw_error(&ec, "WriteFile");
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return 0;
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}
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return rv;
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}
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int fi_read(void *handle, void *data, int length, std::error_code &ec) {
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ec.clear();
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DWORD rv = 0;
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BOOL ok;
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LARGE_INTEGER zero = { 0 };
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ok = SetFilePointerEx(handle, zero, nullptr, FILE_BEGIN);
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if (!ok) {
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set_or_throw_error(&ec, "SetFilePointerEx");
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return 0;
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}
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ok = ReadFile(handle, data, length, &rv, nullptr);
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if (!ok) {
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set_or_throw_error(&ec, "ReadFile");
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return 0;
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}
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return rv;
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}
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#else
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void fi_close(int fd) {
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close(fd);
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}
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int fi_open(const std::string &path, int perm, std::error_code &ec) {
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#if defined(__sun__)
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if (perm == 1) return attropen(path.c_str(), XATTR_FINDERINFO_NAME, O_RDONLY);
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else return attropen(path.c_str(), XATTR_FINDERINFO_NAME, O_RDWR | O_CREAT, 0666);
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#else
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// linux needs to open as read/write to write it?
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//return open(path.c_str(), read_only ? O_RDONLY : O_RDWR);
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return open(path.c_str(), O_RDONLY);
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#endif
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}
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int fi_write(int fd, const void *data, int length, std::error_code &ec) {
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#if defined(__sun__)
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lseek(fd, 0, SEEK_SET);
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return write(fd, data, length);
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#else
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return write_xattr(fd, XATTR_FINDERINFO_NAME, data, length);
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#endif
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}
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int fi_read(int fd, void *data, int length, std::error_code &ec) {
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#if defined(__sun__)
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lseek(fd, 0, SEEK_SET);
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return read(fd, data, length);
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#else
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return read_xattr(fd, XATTR_FINDERINFO_NAME, data, length);
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#endif
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}
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#endif
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#if defined(_WIN32)
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void afp_init(struct AFP_Info *info) {
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//static_assert(sizeof(AFP_Info) == 60, "Incorrect AFP_Info size");
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memset(info, 0, sizeof(*info));
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info->magic = 0x00504641;
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info->version = 0x00010000;
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info->backup_date = 0x80000000;
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}
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int afp_verify(struct AFP_Info *info) {
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if (!info) return 0;
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if (info->magic != 0x00504641) return 0;
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if (info->version != 0x00010000) return 0;
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return 1;
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}
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int afp_to_filetype(struct AFP_Info *info, uint16_t *file_type, uint32_t *aux_type) {
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// check for prodos ftype/auxtype...
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if (info->prodos_file_type || info->prodos_aux_type) {
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*file_type = info->prodos_file_type;
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*aux_type = info->prodos_aux_type;
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return 0;
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}
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int ok = finder_info_to_filetype(info->finder_info, file_type, aux_type);
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if (ok == 0) {
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info->prodos_file_type = *file_type;
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info->prodos_aux_type = *aux_type;
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}
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return 0;
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}
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enum {
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trust_prodos,
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trust_hfs
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};
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void afp_synchronize(struct AFP_Info *info, int trust) {
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// if ftype/auxtype is inconsistent between prodos and finder info, use
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// prodos as source of truth.
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uint16_t f = 0;
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uint32_t a = 0;
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if (finder_info_to_filetype(info->finder_info, &f, &a)) {
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if (f == info->prodos_file_type && a == info->prodos_aux_type) return;
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}
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if (trust == trust_prodos)
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file_type_to_finder_info(info->finder_info, info->prodos_file_type, info->prodos_aux_type);
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else {
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info->prodos_file_type = f;
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info->prodos_aux_type = a;
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}
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}
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#endif
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}
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finder_info_helper::finder_info_helper() {
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#if defined(_WIN32)
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afp_init(&_afp);
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#else
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memset(&_finder_info, 0, sizeof(_finder_info));
|
|
#endif
|
|
}
|
|
|
|
void finder_info_helper::close() {
|
|
#if _WIN32
|
|
if (_fd != INVALID_HANDLE_VALUE) CloseHandle(_fd);
|
|
_fd = INVALID_HANDLE_VALUE;
|
|
#else
|
|
if (_fd >= 0) close(_fd);
|
|
_fd = -1;
|
|
#endif
|
|
|
|
}
|
|
finder_info_helper::~finder_info_helper() {
|
|
close();
|
|
}
|
|
|
|
bool finder_info_helper::open(const std::string &name, open_mode perm, std::error_code &ec) {
|
|
|
|
ec.clear();
|
|
|
|
close();
|
|
|
|
if (perm < 1 || perm > 3) {
|
|
ec = std::make_error_code(std::errc::invalid_argument);
|
|
return false;
|
|
}
|
|
|
|
auto fd = fi_open(name, perm, ec);
|
|
if (ec) return false;
|
|
|
|
// win32 should read even if write-only.
|
|
bool ok = read(_fd, ec);
|
|
|
|
if (perm == read_only) {
|
|
fi_close(fd);
|
|
return ok;
|
|
}
|
|
|
|
// write mode, so it's ok if it doesn't exist.
|
|
if (!ok) ec.clear();
|
|
_fd = fd;
|
|
return true;
|
|
}
|
|
#if _WIN32
|
|
|
|
bool finder_info_helper::open(const std::wstring &name, open_mode perm, std::error_code &ec) {
|
|
|
|
ec.clear();
|
|
|
|
close();
|
|
|
|
if (perm < 1 || perm > 3) {
|
|
ec = std::make_error_code(std::errc::invalid_argument);
|
|
return false;
|
|
}
|
|
|
|
auto fd = fi_open(name, perm, ec);
|
|
if (ec) return false;
|
|
|
|
// win32 should read even if write-only.
|
|
bool ok = read(_fd, ec);
|
|
|
|
if (perm == read_only) {
|
|
fi_close(fd);
|
|
return ok;
|
|
}
|
|
|
|
// write mode, so it's ok if it doesn't exist.
|
|
if (!ok) ec.clear();
|
|
_fd = fd;
|
|
return true;
|
|
}
|
|
|
|
bool finder_info_helper::read(void *fd, std::error_code &ec) {
|
|
|
|
int ok = fi_read(fd, &_afp, sizeof(_afp), ec);
|
|
if (ec) {
|
|
afp_init(&_afp);
|
|
return false;
|
|
}
|
|
if (ok < sizeof(_afp) || !afp_verify(&_afp)) {
|
|
ec = std::make_error_code(std::errc::illegal_byte_sequence); // close enough!
|
|
afp_init(&_afp);
|
|
return false;
|
|
}
|
|
if (!_afp.prodos_file_type && !_afp.prodos_aux_type)
|
|
afp_synchronize(&_afp, trust_hfs);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool finder_info_helper::write(void *fd, std::error_code &ec) {
|
|
return fi_write(fd, &_afp, sizeof(_afp), ec) == sizeof(_afp);
|
|
}
|
|
|
|
#else
|
|
|
|
bool finder_info_helper::read(int fd, std::error_code &ec) {
|
|
|
|
int ok = fi_read(fd, &_finder_info, sizeof(_finder_info), ec);
|
|
if (ok < 0) {
|
|
memset(&_finder_info, 0, sizeof(_finder_info));
|
|
return false;
|
|
}
|
|
finder_info_to_filetype(_finder_info, &_prodos_file_type, &_prodos_aux_type);
|
|
return true;
|
|
}
|
|
|
|
bool finder_info_helper::write(int fd, std::error_code &ec) {
|
|
return fi_write(fd, &_finder_info, sizeof(_finder_info), ec) == sizeof(_finder_info);
|
|
}
|
|
|
|
#endif
|
|
|
|
bool finder_info_helper::write(std::error_code &ec) {
|
|
ec.clear();
|
|
return write(_fd, ec);
|
|
}
|
|
|
|
|
|
bool finder_info_helper::write(const std::string &name, std::error_code &ec) {
|
|
ec.clear();
|
|
auto fd = fi_open(name, write_only, ec);
|
|
|
|
if (ec)
|
|
return false;
|
|
|
|
bool ok = write(fd, ec);
|
|
fi_close(fd);
|
|
return ok;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
bool finder_info_helper::write(const std::wstring &name, std::error_code &ec) {
|
|
ec.clear();
|
|
auto fd = fi_open(name, write_only, ec);
|
|
|
|
if (ec)
|
|
return false;
|
|
|
|
bool ok = write(fd, ec);
|
|
fi_close(fd);
|
|
return ok;
|
|
}
|
|
|
|
#endif
|
|
|
|
void finder_info_helper::set_prodos_file_type(uint16_t ftype, uint32_t atype) {
|
|
_prodos_file_type = ftype;
|
|
_prodos_aux_type = atype;
|
|
file_type_to_finder_info(_finder_info, ftype, atype);
|
|
}
|
|
|
|
|
|
void finder_info_helper::set_prodos_file_type(uint16_t ftype) {
|
|
set_prodos_file_type(ftype, _prodos_aux_type);
|
|
}
|
|
|
|
bool finder_info_helper::is_text() const {
|
|
if (memcmp(_finder_info, "TEXT", 4) == 0) return true;
|
|
if (_prodos_file_type == 0x04) return true;
|
|
if (_prodos_file_type == 0xb0) return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
bool finder_info_helper::is_binary() const {
|
|
if (is_text()) return false;
|
|
if (_prodos_file_type || _prodos_aux_type) return true;
|
|
|
|
if (memcmp(_finder_info, "\x00\x00\x00\x00\x00\x00\x00\x00", 8) == 0) return false;
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
uint32_t finder_info_helper::file_type() const {
|
|
uint32_t rv = 0;
|
|
for (unsigned i = 0; i < 4; ++i) {
|
|
rv <<= 8;
|
|
rv |= _finder_info[i];
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
uint32_t finder_info_helper::creator_type() const {
|
|
uint32_t rv = 0;
|
|
for (unsigned i = 4; i < 8; ++i) {
|
|
rv <<= 8;
|
|
rv |= _finder_info[i];
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
void finder_info_helper::set_file_type(uint32_t x) {
|
|
_finder_info[0] = x >> 24;
|
|
_finder_info[1] = x >> 16;
|
|
_finder_info[2] = x >> 8;
|
|
_finder_info[3] = x >> 0;
|
|
}
|
|
|
|
|
|
void finder_info_helper::set_creator_type(uint32_t x) {
|
|
_finder_info[4] = x >> 24;
|
|
_finder_info[5] = x >> 16;
|
|
_finder_info[6] = x >> 8;
|
|
_finder_info[7] = x >> 0;
|
|
}
|