pkg/kernel: add new package

Move functionality to build kernel/image
from syz-gce to a separate package.

1 files changed, 36 insertions, 0 deletions

diff --git a/pkg/osutil/osutil.go b/pkg/osutil/osutil.go
new file mode 100644
index 000000000..0bd4cdfac
--- /dev/null
+++ b/pkg/osutil/osutil.go
@@ -0,0 +1,36 @@
+// Copyright 2017 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package osutil
+
+import (
+	"bytes"
+	"fmt"
+	"os/exec"
+	"time"
+)
+
+// RunCmd runs "bin args..." in dir with timeout and returns its output.
+func RunCmd(timeout time.Duration, dir, bin string, args ...string) ([]byte, error) {
+	output := new(bytes.Buffer)
+	cmd := exec.Command(bin, args...)
+	cmd.Dir = dir
+	cmd.Stdout = output
+	cmd.Stderr = output
+	if err := cmd.Start(); err != nil {
+		return nil, fmt.Errorf("failed to start %v %+v: %v", bin, args, err)
+	}
+	done := make(chan bool)
+	go func() {
+		select {
+		case <-time.After(time.Hour):
+			cmd.Process.Kill()
+		case <-done:
+		}
+	}()
+	defer close(done)
+	if err := cmd.Wait(); err != nil {
+		return nil, fmt.Errorf("failed to run %v %+v: %v\n%v", bin, args, err, output.String())
+	}
+	return output.Bytes(), nil
+}