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update mpw open to be more consistent with actual implementation. Also support for non-HFS volumes.

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This commit is contained in:
Kelvin Sherlock 2017-10-02 21:15:51 -04:00
parent 119d9aab57
commit 776b385a41
1 changed files with 62 additions and 7 deletions
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69
mpw/mpw_access.cpp
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@ -155,6 +155,46 @@ namespace MPW
} }
/*
MPW's open logic pseudo code:
if (flags & 0x1000) { // undocumented - use old tool calls
oserr = flags & O_RSRC ? PBOPENRF() : PBOPEN();
} else {
oserr = flags & O_RSRC ? PBHOPENRF() : PBHOPEN();
}
if (!oserr) {
if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) {
errno = EEXIST;
return;
}
return;
}
if (oserr == file not found) {
if (flags & O_CREAT) {
oserr = PBCreate();
if (!oserr) {
oserr = flag & O_RSRC ? PBOpenRF() : PBOpen();
}
}
PBGETFCBINFO();
if (file size) {
if (flags & O_TRUNC) {
oserr = PBSetEOF();
}
if (!permission check) {
errno = EPERM;
PBClose();
}
*/
uint32_t ftrap_open(uint32_t name, uint32_t parm) uint32_t ftrap_open(uint32_t name, uint32_t parm)
{ {
uint32_t d0; uint32_t d0;
@ -162,7 +202,7 @@ namespace MPW
std::string sname; std::string sname;
MPWFile f; MPWFile f;
int nativeFlags; int nativeFlags = 0;
std::memset(&f, 0, sizeof(f)); std::memset(&f, 0, sizeof(f));
f.flags = memoryReadWord(parm); f.flags = memoryReadWord(parm);
@ -194,15 +234,30 @@ namespace MPW
Log(" open(%s, %04x)\n", sname.c_str(), f.flags); Log(" open(%s, %04x)\n", sname.c_str(), f.flags);
// TODO -- can you create a resource file like this?
if (f.flags & kO_RSRC) if (f.flags & kO_RSRC) {
sname.append(_PATH_RSRCFORKSPEC);
if (f.flags & kO_CREAT) // O_CREAT and O_EXCL apply to the file, not the fork.
int flags = O_RDONLY | (nativeFlags & (O_CREAT | O_EXCL));
int parent = ::open(sname.c_str(), flags, 0666);
fd = -1;
if (parent >= 0) {
sname.append(_PATH_RSRCFORKSPEC);
nativeFlags &= ~O_EXCL;
// APFS, etc - resource fork doesn't automatically exist so
// need O_CREAT.
if ((nativeFlags & O_ACCMODE) != O_RDONLY) nativeFlags |= O_CREAT;
fd = ::open(sname.c_str(), nativeFlags, 0666);
close(parent);
}
} else {
fd = ::open(sname.c_str(), nativeFlags, 0666); fd = ::open(sname.c_str(), nativeFlags, 0666);
else }
fd = ::open(sname.c_str(), nativeFlags);
if (fd < 0) if (fd < 0)
{ {