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Check that the pid in pidfile exists before preventing docker to start

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This commit is contained in:
Guillaume J. Charmes 2013-04-22 15:57:31 -07:00
parent acb546cd1b
commit f079fbe3fa
1 changed files with 9 additions and 2 deletions
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11
docker/docker.go
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@ -7,9 +7,11 @@ import (
"github.com/dotcloud/docker/rcli"
"github.com/dotcloud/docker/term"
"io"
"io/ioutil"
"log"
"os"
"os/signal"
"strconv"
"syscall"
)
@ -54,8 +56,13 @@ func main() {
}
func createPidFile(pidfile string) error {
if _, err := os.Stat(pidfile); err == nil {
return fmt.Errorf("pid file found, ensure docker is not running or delete %s", pidfile)
if pidString, err := ioutil.ReadFile(pidfile); err == nil {
pid, err := strconv.Atoi(string(pidString))
if err == nil {
if _, err := os.Stat(fmt.Sprintf("/proc/%d/", pid)); err == nil {
return fmt.Errorf("pid file found, ensure docker is not running or delete %s", pidfile)
}
}
}
file, err := os.Create(pidfile)