| // Copyright Istio Authors |
| // |
| // 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 ( |
| "fmt" |
| "os/exec" |
| "strings" |
| ) |
| |
| import ( |
| "github.com/google/shlex" |
| "istio.io/pkg/log" |
| ) |
| |
| var scope = log.RegisterScope("shell", "Shell execution scope", 0) |
| |
| // Execute the given command. |
| func Execute(combinedOutput bool, format string, args ...interface{}) (string, error) { |
| s := fmt.Sprintf(format, args...) |
| |
| parts, err := shlex.Split(s) |
| if err != nil { |
| return "", fmt.Errorf("fail to parse cmd: %q, err: %v", s, err) |
| } |
| |
| var p []string |
| for i := 0; i < len(parts); i++ { |
| if parts[i] != "" { |
| p = append(p, parts[i]) |
| } |
| } |
| |
| var argStrings []string |
| if len(p) > 0 { |
| argStrings = p[1:] |
| } |
| return ExecuteArgs(nil, combinedOutput, parts[0], argStrings...) |
| } |
| |
| func ExecuteArgs(env []string, combinedOutput bool, name string, args ...string) (string, error) { |
| if scope.DebugEnabled() { |
| cmd := strings.Join(args, " ") |
| cmd = name + " " + cmd |
| scope.Debugf("Executing command: %s", cmd) |
| } |
| |
| c := exec.Command(name, args...) |
| c.Env = env |
| |
| var b []byte |
| var err error |
| if combinedOutput { |
| // Combine stderr and stdout in b. |
| b, err = c.CombinedOutput() |
| } else { |
| // Just return stdout in b. |
| b, err = c.Output() |
| } |
| |
| if err != nil || !c.ProcessState.Success() { |
| scope.Debugf("Command[%s] => (FAILED) %s", name, string(b)) |
| } else { |
| scope.Debugf("Command[%s] => %s", name, string(b)) |
| } |
| |
| return string(b), err |
| } |