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Fix RenameOp compatibility with macfuse 4.x 

Closed-source macfuse 4.x has broken compatibility with osxfuse 3.x:
it passes an additional 64-bit field (flags) after RenameIn regardless
that we don't enable the support for RENAME_SWAP/RENAME_EXCL.

The simplest fix is just to check for the presence of all-zero flags
and strip them when they're present.
geesefs-0-30-9
Vitaliy Filippov 2021-10-08 16:22:30 +03:00
parent ec521aa7b7
commit a7dcac672f
1 changed files with 9 additions and 0 deletions
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9
conversions.go
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@ -207,6 +207,15 @@ func convertInMessage(
}
names := inMsg.ConsumeBytes(inMsg.Len())
// closed-source macfuse 4.x has broken compatibility with osxfuse 3.x:
// it passes an additional 64-bit field (flags) after RenameIn regardless
// that we don't enable the support for RENAME_SWAP/RENAME_EXCL
// the simplest fix is just to check for the presence of all-zero flags
if len(names) >= 8 &&
names[0] == 0 && names[1] == 0 && names[2] == 0 && names[3] == 0 &&
names[4] == 0 && names[5] == 0 && names[6] == 0 && names[7] == 0 {
names = names[8 : ]
}
// names should be "old\x00new\x00"
if len(names) < 4 {
return nil, errors.New("Corrupt OpRename")