diff options
Diffstat (limited to 'internal/syscallcompat/sys_linux.go')
| -rw-r--r-- | internal/syscallcompat/sys_linux.go | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/internal/syscallcompat/sys_linux.go b/internal/syscallcompat/sys_linux.go index 36ce7d5..45c18d2 100644 --- a/internal/syscallcompat/sys_linux.go +++ b/internal/syscallcompat/sys_linux.go @@ -130,6 +130,9 @@ func asUser(f func() (int, error), context *fuse.Context) (int, error) { // // It switches the current thread to the new user, performs the syscall, // and switches back. +// +// If `context` is nil, this function behaves like ordinary Openat (no +// user switching). func OpenatUser(dirfd int, path string, flags int, mode uint32, context *fuse.Context) (fd int, err error) { f := func() (int, error) { return Openat(dirfd, path, flags, mode) @@ -143,6 +146,7 @@ func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) { } // MknodatUser runs the Mknodat syscall in the context of a different user. +// If `context` is nil, this function behaves like ordinary Mknodat. // // See OpenatUser() for how this works. func MknodatUser(dirfd int, path string, mode uint32, dev int, context *fuse.Context) (err error) { @@ -195,6 +199,7 @@ func FchmodatNofollow(dirfd int, path string, mode uint32) (err error) { } // SymlinkatUser runs the Symlinkat syscall in the context of a different user. +// If `context` is nil, this function behaves like ordinary Symlinkat. // // See OpenatUser() for how this works. func SymlinkatUser(oldpath string, newdirfd int, newpath string, context *fuse.Context) (err error) { @@ -207,6 +212,7 @@ func SymlinkatUser(oldpath string, newdirfd int, newpath string, context *fuse.C } // MkdiratUser runs the Mkdirat syscall in the context of a different user. +// If `context` is nil, this function behaves like ordinary Mkdirat. // // See OpenatUser() for how this works. func MkdiratUser(dirfd int, path string, mode uint32, context *fuse.Context) (err error) { @@ -218,6 +224,20 @@ func MkdiratUser(dirfd int, path string, mode uint32, context *fuse.Context) (er return err } +// LsetxattrUser runs the Lsetxattr syscall in the context of a different user. +// This is useful when setting ACLs, as the result depends on the user running +// the operation (see fuse-xfstests generic/375). +// +// If `context` is nil, this function behaves like ordinary Lsetxattr. +func LsetxattrUser(path string, attr string, data []byte, flags int, context *fuse.Context) (err error) { + f := func() (int, error) { + err := unix.Lsetxattr(path, attr, data, flags) + return -1, err + } + _, err = asUser(f, context) + return err +} + func timesToTimespec(a *time.Time, m *time.Time) []unix.Timespec { ts := make([]unix.Timespec, 2) ts[0] = unix.Timespec(fuse.UtimeToTimespec(a)) |