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Diffstat (limited to 'vendor/github.com/mattn/go-isatty/isatty_windows.go')
-rw-r--r--vendor/github.com/mattn/go-isatty/isatty_windows.go125
1 files changed, 125 insertions, 0 deletions
diff --git a/vendor/github.com/mattn/go-isatty/isatty_windows.go b/vendor/github.com/mattn/go-isatty/isatty_windows.go
new file mode 100644
index 000000000..1fa869154
--- /dev/null
+++ b/vendor/github.com/mattn/go-isatty/isatty_windows.go
@@ -0,0 +1,125 @@
+// +build windows
+// +build !appengine
+
+package isatty
+
+import (
+ "errors"
+ "strings"
+ "syscall"
+ "unicode/utf16"
+ "unsafe"
+)
+
+const (
+ objectNameInfo uintptr = 1
+ fileNameInfo = 2
+ fileTypePipe = 3
+)
+
+var (
+ kernel32 = syscall.NewLazyDLL("kernel32.dll")
+ ntdll = syscall.NewLazyDLL("ntdll.dll")
+ procGetConsoleMode = kernel32.NewProc("GetConsoleMode")
+ procGetFileInformationByHandleEx = kernel32.NewProc("GetFileInformationByHandleEx")
+ procGetFileType = kernel32.NewProc("GetFileType")
+ procNtQueryObject = ntdll.NewProc("NtQueryObject")
+)
+
+func init() {
+ // Check if GetFileInformationByHandleEx is available.
+ if procGetFileInformationByHandleEx.Find() != nil {
+ procGetFileInformationByHandleEx = nil
+ }
+}
+
+// IsTerminal return true if the file descriptor is terminal.
+func IsTerminal(fd uintptr) bool {
+ var st uint32
+ r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, fd, uintptr(unsafe.Pointer(&st)), 0)
+ return r != 0 && e == 0
+}
+
+// Check pipe name is used for cygwin/msys2 pty.
+// Cygwin/MSYS2 PTY has a name like:
+// \{cygwin,msys}-XXXXXXXXXXXXXXXX-ptyN-{from,to}-master
+func isCygwinPipeName(name string) bool {
+ token := strings.Split(name, "-")
+ if len(token) < 5 {
+ return false
+ }
+
+ if token[0] != `\msys` &&
+ token[0] != `\cygwin` &&
+ token[0] != `\Device\NamedPipe\msys` &&
+ token[0] != `\Device\NamedPipe\cygwin` {
+ return false
+ }
+
+ if token[1] == "" {
+ return false
+ }
+
+ if !strings.HasPrefix(token[2], "pty") {
+ return false
+ }
+
+ if token[3] != `from` && token[3] != `to` {
+ return false
+ }
+
+ if token[4] != "master" {
+ return false
+ }
+
+ return true
+}
+
+// getFileNameByHandle use the undocomented ntdll NtQueryObject to get file full name from file handler
+// since GetFileInformationByHandleEx is not avilable under windows Vista and still some old fashion
+// guys are using Windows XP, this is a workaround for those guys, it will also work on system from
+// Windows vista to 10
+// see https://stackoverflow.com/a/18792477 for details
+func getFileNameByHandle(fd uintptr) (string, error) {
+ if procNtQueryObject == nil {
+ return "", errors.New("ntdll.dll: NtQueryObject not supported")
+ }
+
+ var buf [4 + syscall.MAX_PATH]uint16
+ var result int
+ r, _, e := syscall.Syscall6(procNtQueryObject.Addr(), 5,
+ fd, objectNameInfo, uintptr(unsafe.Pointer(&buf)), uintptr(2*len(buf)), uintptr(unsafe.Pointer(&result)), 0)
+ if r != 0 {
+ return "", e
+ }
+ return string(utf16.Decode(buf[4 : 4+buf[0]/2])), nil
+}
+
+// IsCygwinTerminal() return true if the file descriptor is a cygwin or msys2
+// terminal.
+func IsCygwinTerminal(fd uintptr) bool {
+ if procGetFileInformationByHandleEx == nil {
+ name, err := getFileNameByHandle(fd)
+ if err != nil {
+ return false
+ }
+ return isCygwinPipeName(name)
+ }
+
+ // Cygwin/msys's pty is a pipe.
+ ft, _, e := syscall.Syscall(procGetFileType.Addr(), 1, fd, 0, 0)
+ if ft != fileTypePipe || e != 0 {
+ return false
+ }
+
+ var buf [2 + syscall.MAX_PATH]uint16
+ r, _, e := syscall.Syscall6(procGetFileInformationByHandleEx.Addr(),
+ 4, fd, fileNameInfo, uintptr(unsafe.Pointer(&buf)),
+ uintptr(len(buf)*2), 0, 0)
+ if r == 0 || e != 0 {
+ return false
+ }
+
+ l := *(*uint32)(unsafe.Pointer(&buf))
+ return isCygwinPipeName(string(utf16.Decode(buf[2 : 2+l/2])))
+}