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Use paths for volumes without file ID support

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This fixes an issue where remote folders on the Basilisk II "Unix"
volume would not resolve correctly after a system restart.
This commit is contained in:
Dietrich Epp 2023-05-06 14:03:13 -04:00
parent 5f1b8e872b
commit 3398ed425c
2 changed files with 39 additions and 5 deletions
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SyncFiles CW4.mcp
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macos/project.c
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@ -38,7 +38,9 @@ uint32 chunk crc32
Chunks: (names zero-padded)
"LOCA" local directory alias
"LOCP" local directory path
"REMA" destination directory alias
"REMP" destination directory path
Chunks are aligned to 16 byte boundaries, and the file is padded to a 16 byte
boundary. This is just to make it easier to read hexdumps.
@ -183,7 +185,7 @@ static void ProjectClose(WindowRef window, ProjectHandle project)
DisposeHandle((Handle)project);
}
#define kChunkCount 2
#define kChunkCount 4
#define ALIGN(x) (((x) + 15) & ~(UInt32)15)
@ -218,6 +220,7 @@ static OSErr ProjectWriteHeader(short refNum, int nchunks,
}
static const UInt32 kProjectAliasChunks[2] = {'LOCA', 'REMA'};
static const UInt32 kProjectPathChunks[2] = {'LOCP', 'REMP'};
static OSErr ProjectFlush(short refNum)
{
@ -250,6 +253,12 @@ static OSErr ProjectWriteContent(ProjectHandle project, short refNum)
ckInfo[nchunks].id = kProjectAliasChunks[i];
nchunks++;
}
h = (*project)->dirs[i].path;
if (h != NULL) {
ckData[nchunks] = h;
ckInfo[nchunks].id = kProjectPathChunks[i];
nchunks++;
}
}
// Calculate chunk offsets.
@ -543,6 +552,28 @@ void ProjectActivate(WindowRef window, ProjectHandle project, int isActive)
}
}
// VolumeDoesSupportIDs returns true if the volume supports file IDs. If the
// volume does not support file IDs, then we fall back to using paths to refer
// to project directories. This applies to the Basilisk II "Unix" volume. If you
// try to resolve an alias to a file on the Basilisk II "Unix" volume, you may
// get a different file than intended, because the directory IDs are not stable.
static Boolean VolumeDoesSupportIDs(short vRefNum)
{
HParamBlockRec hb;
GetVolParmsInfoBuffer parms;
OSErr err;
memset(&hb, 0, sizeof(hb));
hb.ioParam.ioVRefNum = vRefNum;
hb.ioParam.ioBuffer = (Ptr)&parms;
hb.ioParam.ioReqCount = sizeof(parms);
err = PBHGetVolParms(&hb, false);
if (err != noErr) {
ExitErrorOS(kErrUnknown, err);
}
return (parms.vMAttrib & (1ul << bHasFileIDs)) != 0;
}
static void ProjectChooseDir(WindowRef window, ProjectHandle project,
int whichDir)
{
@ -557,13 +588,16 @@ static void ProjectChooseDir(WindowRef window, ProjectHandle project,
if (!ChooseDirectory(&directory)) {
return;
}
err = NewAlias(NULL, &directory, &alias);
if (err != noErr) {
ExitErrorOS(kErrUnknown, err);
if (VolumeDoesSupportIDs(directory.vRefNum)) {
err = NewAlias(NULL, &directory, &alias);
if (err != noErr) {
ExitErrorOS(kErrUnknown, err);
}
} else {
alias = NULL;
}
err = GetDirPath(&directory, &pathLength, &path);
if (err != noErr) {
DisposeHandle((Handle)alias);
ExitErrorOS(kErrUnknown, err);
}
projectp = *project;