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/*
* Copyright (C) 2014 ~ 2018 Deepin Technology Co., Ltd.
*
* Author: jouyouyun <jouyouwen717@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package utils
// #include <stdlib.h>
import "C"
import "unsafe"
import (
"bytes"
"fmt"
"os"
"os/exec"
"os/user"
"strings"
"time"
)
func IsEnvExists(envName string) (ok bool) {
for _, e := range os.Environ() {
if strings.HasPrefix(e, envName+"=") {
ok = true
break
}
}
return
}
func UnsetEnv(envName string) (err error) {
doUnsetEnvC(envName) // call C.unsetenv() is necessary
envs := os.Environ()
newEnvsData := make(map[string]string)
for _, e := range envs {
a := strings.SplitN(e, "=", 2)
var name, value string
if len(a) == 2 {
name = a[0]
value = a[1]
} else {
name = a[0]
value = ""
}
if name != envName {
newEnvsData[name] = value
}
}
os.Clearenv()
for e, v := range newEnvsData {
err = os.Setenv(e, v)
if err != nil {
return
}
}
return
}
func doUnsetEnvC(envName string) {
cname := C.CString(envName)
defer C.free(unsafe.Pointer(cname))
C.unsetenv(cname)
}
func GetUserName() string {
info, err := user.Current()
if err != nil {
return ""
}
return info.Username
}
func ExecAndWait(timeout int, name string, arg ...string) (stdout, stderr string, err error) {
cmd := exec.Command(name, arg...)
var bufStdout, bufStderr bytes.Buffer
cmd.Stdout = &bufStdout
cmd.Stderr = &bufStderr
err = cmd.Start()
if err != nil {
return
}
// wait for process finished
done := make(chan error)
go func() {
done <- cmd.Wait()
}()
select {
case <-time.After(time.Duration(timeout) * time.Second):
if err = cmd.Process.Kill(); err != nil {
return
}
<-done
err = fmt.Errorf("time out and process was killed")
case err = <-done:
stdout = bufStdout.String()
stderr = bufStderr.String()
if err != nil {
return
}
}
return
}
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