ec74d1d2f4
We need
fd7328faf9
to fix a crash reported in https://github.com/rfjakob/gocryptfs/issues/430 :
2019/10/30 17:14:16 Unknown opcode 2016
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x508d38]
This patch is only in the v2.x.x branch. Upgrade to v2, as the
old API is also supported there.
Running
git grep hanwen/go-fuse | grep -v hanwen/go-fuse/v2
to check for forgotten references comes back clean.
91 lines
2.6 KiB
Go
91 lines
2.6 KiB
Go
// +build darwin
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// Package fusefrontend interfaces directly with the go-fuse library.
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package fusefrontend
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import (
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"syscall"
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"golang.org/x/sys/unix"
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"github.com/hanwen/go-fuse/v2/fuse"
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"github.com/rfjakob/gocryptfs/internal/syscallcompat"
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)
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// On Darwin it is needed to unset XATTR_NOSECURITY 0x0008
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func filterXattrSetFlags(flags int) int {
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// See https://opensource.apple.com/source/xnu/xnu-1504.15.3/bsd/sys/xattr.h.auto.html
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const XATTR_NOSECURITY = 0x0008
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return flags &^ XATTR_NOSECURITY
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}
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func (fs *FS) getXAttr(relPath string, cAttr string, context *fuse.Context) ([]byte, fuse.Status) {
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// O_NONBLOCK to not block on FIFOs.
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fd, err := fs.openBackingFile(relPath, syscall.O_RDONLY|syscall.O_NONBLOCK)
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if err != nil {
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return nil, fuse.ToStatus(err)
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}
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defer syscall.Close(fd)
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cData, err := syscallcompat.Fgetxattr(fd, cAttr)
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if err != nil {
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return nil, fuse.ToStatus(err)
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}
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return cData, fuse.OK
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}
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func (fs *FS) setXAttr(relPath string, cAttr string, cData []byte, flags int, context *fuse.Context) fuse.Status {
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// O_NONBLOCK to not block on FIFOs.
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fd, err := fs.openBackingFile(relPath, syscall.O_WRONLY|syscall.O_NONBLOCK)
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// Directories cannot be opened read-write. Retry.
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if err == syscall.EISDIR {
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fd, err = fs.openBackingFile(relPath, syscall.O_RDONLY|syscall.O_DIRECTORY|syscall.O_NONBLOCK)
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}
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if err != nil {
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return fuse.ToStatus(err)
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}
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defer syscall.Close(fd)
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err = unix.Fsetxattr(fd, cAttr, cData, flags)
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return fuse.ToStatus(err)
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}
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func (fs *FS) removeXAttr(relPath string, cAttr string, context *fuse.Context) fuse.Status {
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// O_NONBLOCK to not block on FIFOs.
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fd, err := fs.openBackingFile(relPath, syscall.O_WRONLY|syscall.O_NONBLOCK)
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// Directories cannot be opened read-write. Retry.
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if err == syscall.EISDIR {
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fd, err = fs.openBackingFile(relPath, syscall.O_RDONLY|syscall.O_DIRECTORY|syscall.O_NONBLOCK)
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}
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if err != nil {
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return fuse.ToStatus(err)
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}
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defer syscall.Close(fd)
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err = unix.Fremovexattr(fd, cAttr)
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return fuse.ToStatus(err)
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}
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func (fs *FS) listXAttr(relPath string, context *fuse.Context) ([]string, fuse.Status) {
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// O_NONBLOCK to not block on FIFOs.
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fd, err := fs.openBackingFile(relPath, syscall.O_RDONLY|syscall.O_NONBLOCK)
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// On a symlink, openBackingFile fails with ELOOP. Let's pretend there
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// can be no xattrs on symlinks, and always return an empty result.
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if err == syscall.ELOOP {
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return nil, fuse.OK
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}
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if err != nil {
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return nil, fuse.ToStatus(err)
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}
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defer syscall.Close(fd)
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cNames, err := syscallcompat.Flistxattr(fd)
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if err != nil {
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return nil, fuse.ToStatus(err)
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}
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return cNames, fuse.OK
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}
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