153 lines
3.4 KiB
Go
153 lines
3.4 KiB
Go
// 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_test
|
|
|
|
import (
|
|
"fmt"
|
|
"internal/testenv"
|
|
"os"
|
|
osexec "os/exec"
|
|
"path/filepath"
|
|
"runtime"
|
|
"testing"
|
|
)
|
|
|
|
const executable_EnvVar = "OSTEST_OUTPUT_EXECPATH"
|
|
|
|
func TestExecutable(t *testing.T) {
|
|
testenv.MustHaveExec(t)
|
|
ep, err := os.Executable()
|
|
if err != nil {
|
|
t.Fatalf("Executable failed: %v", err)
|
|
}
|
|
// we want fn to be of the form "dir/prog"
|
|
dir := filepath.Dir(filepath.Dir(ep))
|
|
fn, err := filepath.Rel(dir, ep)
|
|
if err != nil {
|
|
t.Fatalf("filepath.Rel: %v", err)
|
|
}
|
|
|
|
cmd := &osexec.Cmd{}
|
|
// make child start with a relative program path
|
|
cmd.Dir = dir
|
|
cmd.Path = fn
|
|
// forge argv[0] for child, so that we can verify we could correctly
|
|
// get real path of the executable without influenced by argv[0].
|
|
cmd.Args = []string{"-", "-test.run=XXXX"}
|
|
if runtime.GOOS == "openbsd" || runtime.GOOS == "aix" {
|
|
// OpenBSD and AIX rely on argv[0]
|
|
cmd.Args[0] = fn
|
|
}
|
|
cmd.Env = append(os.Environ(), fmt.Sprintf("%s=1", executable_EnvVar))
|
|
out, err := cmd.CombinedOutput()
|
|
if err != nil {
|
|
t.Fatalf("exec(self) failed: %v", err)
|
|
}
|
|
outs := string(out)
|
|
if !filepath.IsAbs(outs) {
|
|
t.Fatalf("Child returned %q, want an absolute path", out)
|
|
}
|
|
if !sameFile(outs, ep) {
|
|
t.Fatalf("Child returned %q, not the same file as %q", out, ep)
|
|
}
|
|
}
|
|
|
|
func sameFile(fn1, fn2 string) bool {
|
|
fi1, err := os.Stat(fn1)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
fi2, err := os.Stat(fn2)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
return os.SameFile(fi1, fi2)
|
|
}
|
|
|
|
func init() {
|
|
if e := os.Getenv(executable_EnvVar); e != "" {
|
|
// first chdir to another path
|
|
dir := "/"
|
|
if runtime.GOOS == "windows" {
|
|
cwd, err := os.Getwd()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
dir = filepath.VolumeName(cwd)
|
|
}
|
|
os.Chdir(dir)
|
|
if ep, err := os.Executable(); err != nil {
|
|
fmt.Fprint(os.Stderr, "ERROR: ", err)
|
|
} else {
|
|
fmt.Fprint(os.Stderr, ep)
|
|
}
|
|
os.Exit(0)
|
|
}
|
|
}
|
|
|
|
func TestExecutableDeleted(t *testing.T) {
|
|
testenv.MustHaveExec(t)
|
|
switch runtime.GOOS {
|
|
case "windows", "plan9":
|
|
t.Skipf("%v does not support deleting running binary", runtime.GOOS)
|
|
case "openbsd", "freebsd", "aix":
|
|
t.Skipf("%v does not support reading deleted binary name", runtime.GOOS)
|
|
}
|
|
|
|
dir := t.TempDir()
|
|
|
|
src := filepath.Join(dir, "testdel.go")
|
|
exe := filepath.Join(dir, "testdel.exe")
|
|
|
|
err := os.WriteFile(src, []byte(testExecutableDeletion), 0666)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
out, err := osexec.Command(testenv.GoToolPath(t), "build", "-o", exe, src).CombinedOutput()
|
|
t.Logf("build output:\n%s", out)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
out, err = osexec.Command(exe).CombinedOutput()
|
|
t.Logf("exec output:\n%s", out)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
const testExecutableDeletion = `package main
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
)
|
|
|
|
func main() {
|
|
before, err := os.Executable()
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "failed to read executable name before deletion: %v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
|
|
err = os.Remove(before)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "failed to remove executable: %v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
|
|
after, err := os.Executable()
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "failed to read executable name after deletion: %v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
|
|
if before != after {
|
|
fmt.Fprintf(os.Stderr, "before and after do not match: %v != %v\n", before, after)
|
|
os.Exit(1)
|
|
}
|
|
}
|
|
`
|