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// Copyright 2019 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package shell
import (
"bytes"
"os/exec"
"time"
)
// Exec runs the executable exe with the given arguments, in the working
// directory wd, with the custom environment flags.
// If the process does not finish within timeout a errTimeout will be returned.
func Exec(timeout time.Duration, exe, wd string, env []string, toStdin string, args ...string) ([]byte, error) {
stdin := &bytes.Buffer{}
stdin.WriteString(toStdin)
b := bytes.Buffer{}
c := exec.Command(exe, args...)
c.Dir = wd
c.Env = env
c.Stdin = stdin
c.Stdout = &b
c.Stderr = &b
if err := c.Start(); err != nil {
return nil, err
}
res := make(chan error)
go func() { res <- c.Wait() }()
select {
case <-time.NewTimer(timeout).C:
c.Process.Kill()
return b.Bytes(), ErrTimeout{exe, timeout}
case err := <-res:
return b.Bytes(), err
}
}