[#issue 3127] Add xattr support for Solaris

doc/020_installation.rst

@@ -295,6 +295,8 @@ supply the target OS and platform via the command-line options like this
 
     $ go run build.go --goos linux --goarch arm --goarm 6
 
+    $ go run build.go --goos solaris --goarch amd64
+
 The resulting binary is statically linked and does not require any
 libraries.
 

internal/restic/node_solaris.go

@@ -9,19 +9,3 @@ func (node Node) restoreSymlinkTimestamps(path string, utimes [2]syscall.Timespe
 func (s statT) atim() syscall.Timespec { return s.Atim }
 func (s statT) mtim() syscall.Timespec { return s.Mtim }
 func (s statT) ctim() syscall.Timespec { return s.Ctim }
-
-// Getxattr retrieves extended attribute data associated with path.
-func Getxattr(path, name string) ([]byte, error) {
-	return nil, nil
-}
-
-// Listxattr retrieves a list of names of extended attributes associated with the
-// given path in the file system.
-func Listxattr(path string) ([]string, error) {
-	return nil, nil
-}
-
-// Setxattr associates name and data together as an attribute of path.
-func Setxattr(path, name string, data []byte) error {
-	return nil
-}

internal/restic/node_xattr.go

@@ -1,4 +1,5 @@
-// +build darwin freebsd linux
+//go:build darwin || freebsd || linux || solaris
+// +build darwin freebsd linux solaris
 
 package restic