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_procfs.go | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 src/os/executable_procfs.go (limited to 'src/os/executable_procfs.go') diff --git a/src/os/executable_procfs.go b/src/os/executable_procfs.go new file mode 100644 index 0000000000..597ab7dd54 --- /dev/null +++ b/src/os/executable_procfs.go @@ -0,0 +1,36 @@ +// 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. + +// +build linux netbsd openbsd dragonfly nacl + +package os + +import ( + "errors" + "runtime" +) + +// We query the executable path at init time to avoid the problem of +// readlink returns a path appended with " (deleted)" when the original +// binary gets deleted. +var executablePath, executablePathErr = func () (string, error) { + var procfn string + switch runtime.GOOS { + default: + return "", errors.New("Executable not implemented for " + runtime.GOOS) + case "linux": + procfn = "/proc/self/exe" + case "netbsd": + procfn = "/proc/curproc/exe" + case "openbsd": + procfn = "/proc/curproc/file" + case "dragonfly": + procfn = "/proc/curproc/file" + } + return Readlink(procfn) +}() + +func executable() (string, error) { + return executablePath, executablePathErr +} -- cgit v1.3