From 2fc67e71af142bfa1e7662a4fde361f43509d2d7 Mon Sep 17 00:00:00 2001 From: Shenghou Ma Date: Sun, 1 Nov 2015 04:18:58 -0500 Subject: os: add Executable() (string, error) // Executable returns the path name for the executable that started // the current process. There is no guarantee that the path is still // pointing to the correct executable. If a symlink was used to start // the process, depending on the operating system, the result might // be the symlink or the path it pointed to. If a stable result is // needed, path/filepath.EvalSymlinks might help. // // Executable returns an absolute path unless an error occurred. // // The main use case is finding resources located relative to an // executable. // // Executable is not supported on nacl or OpenBSD (unless procfs is // mounted.) func Executable() (string, error) { return executable() } Fixes #12773. Change-Id: I469738d905b12f0b633ea4d88954f8859227a88c Reviewed-on: https://go-review.googlesource.com/16551 Run-TryBot: Minux Ma TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/os/executable_windows.go | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 src/os/executable_windows.go (limited to 'src/os/executable_windows.go') diff --git a/src/os/executable_windows.go b/src/os/executable_windows.go new file mode 100644 index 0000000000..fc5cf86005 --- /dev/null +++ b/src/os/executable_windows.go @@ -0,0 +1,32 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package os + +import ( + "internal/syscall/windows" + "syscall" +) + +func getModuleFileName(handle syscall.Handle) (string, error) { + n := uint32(1024) + var buf []uint16 + for { + buf = make([]uint16, n) + r, err := windows.GetModuleFileName(handle, &buf[0], n) + if err != nil { + return "", err + } + if r < n { + break + } + // r == n means n not big enough + n += 1024 + } + return syscall.UTF16ToString(buf), nil +} + +func executable() (string, error) { + return getModuleFileName(0) +} -- cgit v1.3