46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
|
package runc
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"io/ioutil"
|
||
|
|
"os/exec"
|
||
|
|
"strconv"
|
||
|
|
"syscall"
|
||
|
|
)
|
||
|
|
|
||
|
|
// ReadPidFile reads the pid file at the provided path and returns
|
||
|
|
// the pid or an error if the read and conversion is unsuccessful
|
||
|
|
func ReadPidFile(path string) (int, error) {
|
||
|
|
data, err := ioutil.ReadFile(path)
|
||
|
|
if err != nil {
|
||
|
|
return -1, err
|
||
|
|
}
|
||
|
|
return strconv.Atoi(string(data))
|
||
|
|
}
|
||
|
|
|
||
|
|
// runOrError will run the provided command. If an error is
|
||
|
|
// encountered and neither Stdout or Stderr was set the error and the
|
||
|
|
// stderr of the command will be returned in the format of <error>:
|
||
|
|
// <stderr>
|
||
|
|
func runOrError(cmd *exec.Cmd) error {
|
||
|
|
if cmd.Stdout != nil || cmd.Stderr != nil {
|
||
|
|
return cmd.Run()
|
||
|
|
}
|
||
|
|
data, err := cmd.CombinedOutput()
|
||
|
|
if err != nil {
|
||
|
|
return fmt.Errorf("%s: %s", err, data)
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
const exitSignalOffset = 128
|
||
|
|
|
||
|
|
// exitStatus returns the correct exit status for a process based on if it
|
||
|
|
// was signaled or exited cleanly
|
||
|
|
func exitStatus(status syscall.WaitStatus) int {
|
||
|
|
if status.Signaled() {
|
||
|
|
return exitSignalOffset + int(status.Signal())
|
||
|
|
}
|
||
|
|
return status.ExitStatus()
|
||
|
|
}
|