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utils.go
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utils.go
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package main
import (
"errors"
log "github.com/Sirupsen/logrus"
"os"
"os/exec"
"strings"
"time"
)
func check(e error) {
if e != nil {
panic(e)
}
}
func waitForPathToExist(fileName string, numTries int) bool {
log.Info("Waiting for path")
for i := 0; i < numTries; i++ {
_, err := os.Stat(fileName)
if err == nil {
log.Debug("path found: ", fileName)
return true
}
if err != nil && !os.IsNotExist(err) {
return false
}
time.Sleep(time.Second)
out, err := exec.Command("partprobe").CombinedOutput()
log.Debug("Result of partprobe cmd: ", string(out))
}
return false
}
func GetFSType(device string) string {
log.Debugf("Begin utils.GetFSType: %s", device)
fsType := ""
out, err := exec.Command("blkid", device).CombinedOutput()
if err != nil {
return fsType
}
if strings.Contains(string(out), "TYPE=") {
for _, v := range strings.Split(string(out), " ") {
if strings.Contains(v, "TYPE=") {
fsType = strings.Split(v, "=")[1]
fsType = strings.Replace(fsType, "\"", "", -1)
}
}
}
return fsType
}
func FormatVolume(device, fsType string) error {
log.Debugf("Begin utils.FormatVolume: %s, %s", device, fsType)
cmd := "mkfs.ext4"
if fsType == "xfs" {
cmd = "mkfs.xfs"
}
log.Debug("Perform ", cmd, " on device: ", device)
out, err := exec.Command(cmd, "-F", device).CombinedOutput()
log.Debug("Result of mkfs cmd: ", string(out))
return err
}
func Mount(device, mountpoint string) error {
log.Debugf("Begin utils.Mount device: %s on: %s", device, mountpoint)
out, err := exec.Command("mkdir", mountpoint).CombinedOutput()
out, err = exec.Command("mount", device, mountpoint).CombinedOutput()
log.Debug("Response from mount ", device, " at ", mountpoint, ": ", string(out))
if err != nil {
log.Error("Error in mount: ", err)
}
return err
}
func Umount(mountpoint string) error {
log.Debugf("Begin utils.Umount: %s", mountpoint)
out, err := exec.Command("umount", mountpoint).CombinedOutput()
if err != nil {
log.Warningf("Unmount call returned error: %s (%s)", err, out)
if strings.Contains(string(out), "not mounted") {
log.Debug("Ignore request for unmount on unmounted volume")
err = errors.New("Volume is not mounted")
} else {
return err
}
}
out, err = exec.Command("rmdir", mountpoint).CombinedOutput()
if err != nil {
log.Warningf("Remove dir call returned error: %s (%s)", err, out)
if strings.Contains(string(out), "No such file or directory") {
log.Debug("Ignore request for rmdir on missing directory")
err = errors.New("Volume dir already gone")
}
}
return err
}