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mpw/toolbox/os_internal.cpp
Kelvin Sherlock 119d9aab57 APFS - when opening a resource fork as rdwr, create it as well 
--
Under HFS, empty resource fork always exists. on APFS, it must be specifically created.
2017-10-02 16:31:33 -04:00

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/*
* Copyright (c) 2013, Kelvin W Sherlock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "os_internal.h"
#include "os.h"
#include "toolbox.h"
#include <macos/errors.h>
#include <stdexcept>
#include <cerrno>
#include <cstring>
#include <algorithm>
#include <memory>
#include <unistd.h>
#include <fcntl.h>
#include <sys/xattr.h>
#include <sys/attr.h>
#include <sys/paths.h>
#include <machine/endian.h>
using ToolBox::Log;
using MacOS::macos_error_from_errno;
namespace OS { namespace Internal {
/*
tech note PT515
ProDOS -> Macintosh conversion
ProDOS Macintosh
Filetype Auxtype Creator Filetype
$00 $0000 'pdos' 'BINA'
$B0 (SRC) (any) 'pdos' 'TEXT'
$04 (TXT) $0000 'pdos' 'TEXT'
$FF (SYS) (any) 'pdos' 'PSYS'
$B3 (S16) (any) 'pdos' 'PS16'
$uv $wxyz 'pdos' 'p' $uv $wx $yz
Programmer's Reference for System 6.0:
ProDOS Macintosh
File Type Auxiliary Type Creator Type File Type
$00 $0000 “pdos” “BINA”
$04 (TXT) $0000 “pdos” “TEXT”
$FF (SYS) (any) “pdos” “PSYS”
$B3 (S16) $DByz “pdos” “p” $B3 $DB $yz
$B3 (S16) (any) “pdos” “PS16”
$D7 $0000 “pdos” “MIDI”
$D8 $0000 “pdos” “AIFF”
$D8 $0001 “pdos” “AIFC”
$E0 $0005 “dCpy” “dImg”
$FF (SYS) (any) “pdos” “PSYS”
$uv $wxyz “pdos” “p” $uv $wx $yz
mpw standard:
$uv (any) "pdos" printf("%02x ",$uv)
*/
uint16_t GetFinderInfo(const std::string &pathName, void *info, bool extended)
{
// todo -- move to separate function? used in multiple places.
uint8_t buffer[32];
std::memset(buffer, 0, sizeof(buffer));
int rv;
rv = ::getxattr(pathName.c_str(), XATTR_FINDERINFO_NAME, buffer, 32, 0, 0);
if (rv < 0)
{
switch (errno)
{
case ENOENT:
case EACCES:
return macos_error_from_errno();
}
// check for prodos ftype/auxtype
uint8_t ftype;
uint16_t atype;
int rv1, rv2;
rv1 = ::getxattr(pathName.c_str(), "prodos.FileType", &ftype, 1, 0, 0);
rv2 = ::getxattr(pathName.c_str(), "prodos.AuxType", &atype, 2, 0, 0);
if (rv1 == 1 && rv2 == 2)
{
#if BYTE_ORDER == BIG_ENDIAN
ftype = (ftype >> 8) | (ftype << 8);
#endif
char tmp[8] = {
'p', ' ', ' ', ' ',
'p', 'd', 'o', 's'
};
tmp[1] = (char)ftype;
tmp[2] = (char)((atype >> 8) & 0xff);
tmp[3] = (char)(atype & 0xff);
switch (atype)
{
case 0x00:
std::memcpy(tmp, "BINA", 4);
break;
case 0x04:
case 0xb0:
std::memcpy(tmp, "TEXT", 4);
break;
case 0xff:
std::memcpy(tmp, "PSYS", 4);
break;
case 0xd7:
std::memcpy(tmp, "MIDI", 4);
break;
case 0xd8:
switch (atype)
{
case 0x0000:
std::memcpy(tmp, "AIFF", 4);
break;
case 0x0001:
std::memcpy(tmp, "AIFC", 4);
break;
}
break;
case 0xe0:
switch (atype)
{
case 0x0005:
std::memcpy(tmp, "dImgdCpy", 8);
break;
}
case 0xb3:
if (atype == 0)
{
std::memcpy(tmp, "PS16", 4); // verify dumpobj.
break;
}
}
std::memcpy(buffer, tmp, 8);
}
}
// override for source files.
// TODO -- only override if missing?
if (IsTextFile(pathName))
{
std::memcpy(buffer, "TEXTMPS ", 8);
}
// convert pdos types...
if (std::memcmp(buffer + 4, "pdos", 4) == 0)
{
// mpw expects 'xx ' where
// xx are the ascii-encode hex value of the file type.
// the hfs fst uses 'p' ftype8 auxtype16
// todo -- but only if auxtype is $0000 ??
if (buffer[0] == 'p')
{
static char Hex[] = "0123456789ABCDEF";
uint8_t ftype = buffer[1];
buffer[0] = Hex[ftype >> 4];
buffer[1] = Hex[ftype & 0x0f];
buffer[2] = ' ';
buffer[3] = ' ';
}
}
if (extended)
std::memcpy(info, buffer, 32);
else
std::memcpy(info, buffer, 16);
return 0;
}
unsigned tox(unsigned x)
{
if (x >= '0' && x <= '9') return x - '0';
if (x >= 'a' && x <= 'f') return x - 'a' + 10;
if (x >= 'A' && x <= 'F') return x - 'A' + 10;
return 0;
}
uint16_t SetFinderInfo(const std::string &pathName, uint32_t fileType, uint32_t creator)
{
uint8_t buffer[32];
std::memset(buffer, 0, sizeof(buffer));
buffer[0] = fileType >> 24;
buffer[1] = fileType >> 16;
buffer[2] = fileType >> 8;
buffer[3] = fileType >> 0;
buffer[4] = creator >> 24;
buffer[5] = creator >> 16;
buffer[6] = creator >> 8;
buffer[7] = creator >> 0;
return SetFinderInfo(pathName, buffer, true);
}
uint16_t SetFinderInfo(const std::string &pathName, void *info, bool extended)
{
uint8_t buffer[32];
std::memset(buffer, 0, sizeof(buffer));
int rv;
if (extended)
{
std::memmove(buffer, info, 32);
}
else
{
rv = ::getxattr(pathName.c_str(), XATTR_FINDERINFO_NAME, buffer, 32, 0, 0);
if (rv < 0)
{
switch (errno)
{
case ENOENT:
case EACCES:
return macos_error_from_errno();
}
}
std::memmove(buffer, info, 16);
}
// convert pdos types.
if (::memcmp(buffer + 2, " pdos", 6) == 0)
{
unsigned a = buffer[0];
unsigned b = buffer[1];
if (isxdigit(a) && isxdigit(b))
{
buffer[0] = 'p';
buffer[1] = (tox(a) << 4) | tox(b);
buffer[2] = 0;
buffer[3] = 0;
}
}
rv = ::setxattr(pathName.c_str(), XATTR_FINDERINFO_NAME, buffer, 32, 0, 0);
if (rv < 0) return macos_error_from_errno();
return 0;
}
uint16_t SetFileDates(const std::string &pathname, uint32_t createDate, uint32_t modificationDate, uint32_t backupDate)
{
// utimes(2) sets the access and mod times.
// setattrlist sets the create and mod times (among other things)
// this is kind of unfortunate in that a roundtrip will strip any nanoseconds, etc from the date/time.
int rv;
struct attrlist list;
unsigned i = 0;
timespec dates[3];
memset(&list, 0, sizeof(list));
memset(dates, 0, sizeof(dates));
list.bitmapcount = ATTR_BIT_MAP_COUNT;
list.commonattr = 0;
if (createDate)
{
dates[i++].tv_sec = MacToUnix(createDate);
list.commonattr |= ATTR_CMN_CRTIME;
}
if (modificationDate)
{
dates[i++].tv_sec = MacToUnix(modificationDate);
list.commonattr |= ATTR_CMN_MODTIME;
}
if (backupDate)
{
dates[i++].tv_sec = MacToUnix(backupDate);
list.commonattr |= ATTR_CMN_BKUPTIME;
}
if (!i) return 0;
rv = setattrlist(pathname.c_str(), &list, dates, i * sizeof(timespec), 0);
if (rv < 0 && errno == ENOTSUP)
{
// try utimes.
struct timeval tv[2];
memset(tv, 0, sizeof(tv));
if (modificationDate) {
tv[1].tv_sec = MacToUnix(modificationDate);
rv = utimes(pathname.c_str(), tv);
}
}
if (rv < 0) return macos_error_from_errno();
return 0;
}
int32_t mac_seek(uint16_t refNum, uint16_t mode, int32_t offset)
{
off_t rv;
switch (mode & 0x03)
{
case OS::fsAtMark:
mode = SEEK_CUR;
offset = 0;
break;
case OS::fsFromStart:
mode = SEEK_SET;
break;
case OS::fsFromLEOF:
mode = SEEK_END;
break;
case OS::fsFromMark:
mode = SEEK_CUR;
break;
}
rv = ::lseek(refNum, offset, mode);
if (rv < 0) return macos_error_from_errno();
return rv;
}
//std::deque<FDEntry> FDTable;
std::deque<FDEntry> FDEntry::FDTable;
FDEntry& FDEntry::allocate(int fd)
{
std::string noname;
return allocate(fd, noname);
}
FDEntry& FDEntry::allocate(int fd, std::string &&filename)
{
if (fd < 0) throw std::out_of_range("Invalid FD");
if (FDTable.size() <= fd)
FDTable.resize(fd + 1);
auto &e = FDTable[fd];
e.refcount = 1;
e.text = false;
e.resource = false;
e.filename = std::move(filename);
return e;
}
FDEntry& FDEntry::allocate(int fd, const std::string &filename)
{
if (fd < 0) throw std::out_of_range("Invalid FD");
if (FDTable.size() <= fd)
FDTable.resize(fd + 1);
auto &e = FDTable[fd];
e.refcount = 1;
e.text = false;
e.resource = false;
e.filename = filename;
return e;
}
int FDEntry::close(int fd, bool force)
{
if (fd < 0 || fd >= FDTable.size())
{
errno = EBADF;
return -1;
}
auto &e = FDTable[fd];
if (!e.refcount)
{
errno = EBADF;
return -1;
}
if (--e.refcount == 0 || force)
{
e.refcount = 0;
return ::close(fd);
}
return 0;
}
ssize_t FDEntry::read(int fd, void *buffer, size_t count)
{
if (fd < 0 || fd >= FDTable.size())
{
errno = EBADF;
return -1;
}
auto const &e = FDTable[fd];
if (!e.refcount)
{
errno = EBADF;
return -1;
}
// hmm... keep a current seek position?
ssize_t size;
if (e.text)
{
std::unique_ptr<uint8_t[]> trbuffer(new uint8_t[count]);
size = ::read(fd, trbuffer.get(), count);
if (size > 0)
{
std::transform(trbuffer.get(), trbuffer.get() + size, (uint8_t *)buffer,
[](uint8_t c) { return c == '\n' ? '\r' : c; }
);
}
}
else
{
size = ::read(fd, buffer, count);
}
return size;
}
ssize_t FDEntry::write(int fd, const void *buffer, size_t count)
{
if (fd < 0 || fd >= FDTable.size())
{
errno = EBADF;
return -1;
}
auto const &e = FDTable[fd];
if (!e.refcount)
{
errno = EBADF;
return -1;
}
// hmm... keep a current seek position?
ssize_t size;
if (e.text)
{
std::unique_ptr<uint8_t[]> trbuffer(new uint8_t[count]);
if (count > 0)
{
std::transform((const uint8_t *)buffer, (const uint8_t *)buffer + count, trbuffer.get(),
[](uint8_t c) { return c == '\r' ? '\n' : c; }
);
}
size = ::write(fd, trbuffer.get(), count);
}
else
{
size = ::write(fd, buffer, count);
}
return size;
}
int FDEntry::open(const std::string &filename, int ioPermission, int fork)
{
int fd;
if (filename.empty()) return MacOS::bdNamErr;
int access = 0;
// ignore the deny bits for now.
switch(ioPermission & 0x0f)
{
case fsWrPerm:
case fsRdWrPerm:
case fsRdWrShPerm:
case fsCurPerm:
access = O_RDWR;
break;
case fsRdPerm:
access = O_RDONLY;
break;
default:
return MacOS::paramErr;
break;
}
std::string xname = filename;
if (fork) {
xname.append(_PATH_RSRCFORKSPEC);
// O_RDWR should also O_CREAT
}
Log(" open(%s, %04x)\n", xname.c_str(), access);
fd = ::open(xname.c_str(), access);
if (fd < 0 && access == O_RDWR && errno == ENOENT && fork)
{
fd = ::open(xname.c_str(), O_RDWR | O_CREAT, 0666);
}
if (fd < 0 && ioPermission == fsCurPerm && errno == EACCES)
{
fd = ::open(xname.c_str(), O_RDONLY);
}
if (fd < 0)
{
return macos_error_from_errno();
}
// allocate the fd entry
auto &e = OS::Internal::FDEntry::allocate(fd, filename);
e.resource = fork;
e.text = fork ? false : IsTextFile(filename);
return fd;
}
} }
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