Andrey Smirnov 9379cf9ee1 refactor: expose provision as public package
This change is only moving packages and updating import paths.

Goal: expose `internal/pkg/provision` as `pkg/provision` to enable other
projects to import Talos provisioning library.

As cluster checks are almost always required as part of provisioning
process, package `internal/pkg/cluster` was also made public as
`pkg/cluster`.

Other changes were direct dependencies discovered by `importvet` which
were updated.

Public packages (useful, general purpose packages with stable API):

* `internal/pkg/conditions` -> `pkg/conditions`
* `internal/pkg/tail` -> `pkg/tail`

Private packages (used only on provisioning library internally):

* `internal/pkg/inmemhttp` -> `pkg/provision/internal/inmemhttp`
* `internal/pkg/kernel/vmlinuz` -> `pkg/provision/internal/vmlinuz`
* `internal/pkg/cniutils` -> `pkg/provision/internal/cniutils`

Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
2020-08-12 05:12:05 -07:00

55 lines
1.2 KiB
Go

// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package vm
import (
"errors"
"fmt"
"os"
"syscall"
)
func stopProcessByPidfile(pidPath string) error {
pidFile, err := os.Open(pidPath)
if err != nil {
if os.IsNotExist(err) {
return nil
}
return fmt.Errorf("error checking PID file %q: %w", pidPath, err)
}
defer pidFile.Close() //nolint: errcheck
var pid int
if _, err = fmt.Fscanf(pidFile, "%d", &pid); err != nil {
return fmt.Errorf("error reading PID for %q: %w", pidPath, err)
}
proc, err := os.FindProcess(pid)
if err != nil {
return fmt.Errorf("error finding process %d for %q: %w", pid, pidPath, err)
}
if err = proc.Signal(syscall.SIGTERM); err != nil {
if err.Error() == "os: process already finished" {
return nil
}
return fmt.Errorf("error sending SIGTERM to %d (path %q): %w", pid, pidPath, err)
}
if _, err = proc.Wait(); err != nil {
if errors.Is(err, syscall.ECHILD) {
return nil
}
return fmt.Errorf("error waiting for %d to exit (path %q): %w", pid, pidPath, err)
}
return nil
}