Add gocage list snapshot myjail

cmd/snapshots.go

@@ -0,0 +1,87 @@
+package cmd
+
+import (
+	"fmt"
+	"time"
+	"strings"
+)
+
+/********************************************************************************
+ * List all snapshots jails have
+ *******************************************************************************/
+func ListJailsSnapshots(args []string) {
+	var jailNames []string
+	
+	if len(args) > 0 {
+		for _, a := range args {
+			jailNames = append(jailNames, a)
+		}
+	} 
+	
+	if len(jailNames) == 0 || len(args) == 0 {
+		for _, j := range gJails {
+			listJailSnapshots(j)
+		}
+	} else {
+		for _, cj := range gJails {
+			for _, jn := range jailNames {
+				if strings.EqualFold(cj.Name, jn) {
+					listJailSnapshots(cj)
+				}
+			}
+		}
+	}
+}
+
+
+/********************************************************************************
+ * List all snapshots a jail have
+ *******************************************************************************/
+func listJailSnapshots(jail Jail) {
+	var snapshots []Snapshot
+	
+	// 1. List all datasets
+	// TODO : Include mounted filesystems?
+	rs := strings.Split(jail.RootPath, "/")
+	rootDataset := strings.Join(rs[:len(rs)-1], "/")
+	cmd := fmt.Sprintf("zfs list -r -H -o name,mountpoint,used,referenced,creation -t snapshot %s", rootDataset)
+	out, err := executeCommand(cmd)
+	if err != nil {
+		fmt.Printf("Error: %s\n", err.Error())
+		return
+	}
+	
+	fmt.Printf(out)
+	
+	dateLayout := "Mon Jan _2 15:04 2006"
+	loc, _ := time.LoadLocation(gTimeZone)
+	
+	for _, line := range strings.Split(out, "\n") {
+		if len(line) > 0 {
+			ls := strings.Split(line, "\t")
+			// Parse creation date so we can use it to sort snapshots
+			creationts, err := time.ParseInLocation(dateLayout, ls[4], loc)
+			if err != nil {
+				fmt.Println("Error while parsing date %s:", ls[4], err)
+				return
+			}
+			// Get subdir to append to snapshot name
+			subdir := strings.Replace(strings.Split(ls[0], "@")[0], rootDataset, "", 1)
+			
+			snapshots = append(snapshots, Snapshot{Dsname: ls[0],
+				Name: fmt.Sprintf("%s%s", strings.Split(ls[0], "@")[1], subdir),
+				Mountpoint: ls[1],
+				Used: ls[2],
+				Referenced: ls[3],
+				Creation: creationts})
+		}
+	}
+	
+	// Sort snapshots by creation date
+	ss := initSnapshotSortStruct()
+	SnapshotsOrderedBy(ss.CreationInc).Sort(snapshots)
+	
+	for _, s := range snapshots {
+		fmt.Printf("| %s | %s | %s | %s |\n", s.Name, s.Creation.String(), s.Referenced, s.Used)
+	}
+}