github.com/go4org/go4@v0.0.0-20200104003542-c7e774b10ea0/osutil/exec_procfs.go (about)

     1  // Copyright 2015 The go4 Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // +build linux netbsd openbsd dragonfly nacl
    16  
    17  package osutil
    18  
    19  import (
    20  	"errors"
    21  	"os"
    22  	"path/filepath"
    23  	"runtime"
    24  )
    25  
    26  func executable() (string, error) {
    27  	var procfn string
    28  	switch runtime.GOOS {
    29  	default:
    30  		return "", errors.New("Executable not implemented for " + runtime.GOOS)
    31  	case "linux":
    32  		procfn = "/proc/self/exe"
    33  	case "netbsd":
    34  		procfn = "/proc/curproc/exe"
    35  	case "openbsd":
    36  		procfn = "/proc/curproc/file"
    37  	case "dragonfly":
    38  		procfn = "/proc/curproc/file"
    39  	}
    40  	p, err := os.Readlink(procfn)
    41  	return filepath.Clean(p), err
    42  }