108 lines
2.7 KiB
Go
108 lines
2.7 KiB
Go
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/fs"
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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 we have 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 (n *Node) getXAttr(cAttr string) (out []byte, errno syscall.Errno) {
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dirfd, cName, errno := n.prepareAtSyscallMyself()
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if errno != 0 {
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return
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}
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defer syscall.Close(dirfd)
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// O_NONBLOCK to not block on FIFOs.
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fd, err := syscallcompat.Openat(dirfd, cName, syscall.O_RDONLY|syscall.O_NONBLOCK, 0)
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if err != nil {
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return nil, fs.ToErrno(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, fs.ToErrno(err)
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}
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return cData, 0
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}
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func (n *Node) setXAttr(context *fuse.Context, cAttr string, cData []byte, flags uint32) (errno syscall.Errno) {
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dirfd, cName, errno := n.prepareAtSyscallMyself()
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if errno != 0 {
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return
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}
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defer syscall.Close(dirfd)
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// O_NONBLOCK to not block on FIFOs.
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fd, err := syscallcompat.Openat(dirfd, cName, syscall.O_WRONLY|syscall.O_NONBLOCK, 0)
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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 = syscallcompat.Openat(dirfd, cName, syscall.O_RDONLY|syscall.O_DIRECTORY|syscall.O_NONBLOCK, 0)
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}
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if err != nil {
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fs.ToErrno(err)
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}
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defer syscall.Close(fd)
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err = unix.Fsetxattr(fd, cAttr, cData, int(flags))
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return fs.ToErrno(err)
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}
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func (n *Node) removeXAttr(cAttr string) (errno syscall.Errno) {
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dirfd, cName, errno := n.prepareAtSyscallMyself()
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if errno != 0 {
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return
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}
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defer syscall.Close(dirfd)
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// O_NONBLOCK to not block on FIFOs.
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fd, err := syscallcompat.Openat(dirfd, cName, syscall.O_WRONLY|syscall.O_NONBLOCK, 0)
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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 = syscallcompat.Openat(dirfd, cName, syscall.O_RDONLY|syscall.O_DIRECTORY|syscall.O_NONBLOCK, 0)
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}
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if err != nil {
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return fs.ToErrno(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 fs.ToErrno(err)
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}
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func (n *Node) listXAttr() (out []string, errno syscall.Errno) {
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dirfd, cName, errno := n.prepareAtSyscallMyself()
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if errno != 0 {
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return
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}
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defer syscall.Close(dirfd)
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// O_NONBLOCK to not block on FIFOs.
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fd, err := syscallcompat.Openat(dirfd, cName, syscall.O_RDONLY|syscall.O_NONBLOCK, 0)
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if err != nil {
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return nil, fs.ToErrno(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, fs.ToErrno(err)
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}
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return cNames, 0
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}
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