os: add more examples

Updates #16360.

Adds examples for:
+ Chmod
+ Chtimes
+ FileMode

Change-Id: I1b61ee0392fa3774593a7f36aaf0fa1e484c778b
Reviewed-on: https://go-review.googlesource.com/28963
Run-TryBot: Andrew Gerrand <adg@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>

diff --git a/src/os/example_test.go b/src/os/example_test.go
index e82ee3e3c384feee677bf3e3c0aed6ba0c29b7b4..a28255254b4cde0dae6762e5ce30c1e7820b58db 100644 (file)
--- a/src/os/example_test.go
+++ b/src/os/example_test.go
@@ -5,8 +5,10 @@
 package os_test
 
 import (
+       "fmt"
        "log"
        "os"
+       "time"
 )
 
 func ExampleOpenFile() {
@@ -18,3 +20,35 @@ func ExampleOpenFile() {
                log.Fatal(err)
        }
 }
+
+func ExampleChmod() {
+       if err := os.Chmod("some-filename", 0644); err != nil {
+               log.Fatal(err)
+       }
+}
+
+func ExampleChtimes() {
+       mtime := time.Date(2006, time.February, 1, 3, 4, 5, 0, time.UTC)
+       atime := time.Date(2007, time.March, 2, 4, 5, 6, 0, time.UTC)
+       if err := os.Chtimes("some-filename", atime, mtime); err != nil {
+               log.Fatal(err)
+       }
+}
+
+func ExampleFileMode() {
+       fi, err := os.Stat("some-filename")
+       if err != nil {
+               log.Fatal(err)
+       }
+
+       switch mode := fi.Mode(); {
+       case mode.IsRegular():
+               fmt.Println("regular file")
+       case mode.IsDir():
+               fmt.Println("directory")
+       case mode&os.ModeSymlink != 0:
+               fmt.Println("symbolic link")
+       case mode&os.ModeNamedPipe != 0:
+               fmt.Println("named pipe")
+       }
+}