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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2018 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package ctlcmd
import (
"context"
"errors"
"fmt"
"sort"
"text/tabwriter"
"github.com/snapcore/snapd/client/clientutil"
"github.com/snapcore/snapd/i18n"
"github.com/snapcore/snapd/overlord/servicestate"
"github.com/snapcore/snapd/progress"
"github.com/snapcore/snapd/snap"
)
var (
shortServicesHelp = i18n.G("Query the status of services")
longServicesHelp = i18n.G(`
The services command lists information about the services specified.
`)
)
func init() {
addCommand("services", shortServicesHelp, longServicesHelp, func() command { return &servicesCommand{} })
}
type servicesCommand struct {
baseCommand
Positional struct {
ServiceNames []string `positional-arg-name:"<service>"`
} `positional-args:"yes"`
Global bool `long:"global" short:"g" description:"Show the global enable status for user services instead of the status for the current user"`
User bool `long:"user" short:"u" description:"Show the current status of the user services instead of the global enable status"`
}
type byApp []*snap.AppInfo
func (a byApp) Len() int { return len(a) }
func (a byApp) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a byApp) Less(i, j int) bool {
return a[i].Name < a[j].Name
}
var newStatusDecorator = func(ctx context.Context, isGlobal bool, uid string) clientutil.StatusDecorator {
if isGlobal {
return servicestate.NewStatusDecorator(progress.Null)
} else {
return servicestate.NewStatusDecoratorForUid(progress.Null, ctx, uid)
}
}
func (c *servicesCommand) showGlobalEnablement() bool {
if c.uid == "0" && !c.User {
return true
} else if c.uid != "0" && c.Global {
return true
}
return false
}
func (c *servicesCommand) validateArguments() error {
// can't use --global and --user together
if c.Global && c.User {
return errors.New(i18n.G("cannot combine --global and --user switches."))
}
return nil
}
// The 'snapctl services' command is one of the few commands that can run as
// non-root through snapctl.
func (c *servicesCommand) Execute([]string) error {
ctx, err := c.ensureContext()
if err != nil {
return err
}
if err := c.validateArguments(); err != nil {
return err
}
serviceNames := c.Positional.ServiceNames
serviceNames, patched, err := maybePatchServiceNames(ctx.InstanceName(), serviceNames)
if err != nil {
return err
}
st := ctx.State()
svcInfos, err := getServiceInfos(st, ctx.InstanceName(), serviceNames)
if err != nil {
return err
}
sort.Sort(byApp(svcInfos))
isGlobal := c.showGlobalEnablement()
sd := newStatusDecorator(context.TODO(), isGlobal, c.uid)
services, err := clientutil.ClientAppInfosFromSnapAppInfos(svcInfos, sd)
if err != nil || len(services) == 0 {
return err
}
w := tabwriter.NewWriter(c.stdout, 5, 3, 2, ' ', 0)
defer w.Flush()
fmt.Fprintln(w, i18n.G("Service\tStartup\tCurrent\tNotes"))
for _, svc := range services {
fmt.Fprintln(w, clientutil.FmtServiceStatus(&svc, clientutil.FmtServiceStatusOptions{
IsUserGlobal: isGlobal,
// snap name in services may be subject to patching if the calling
// snap has an instance key but the query used $SNAP_NAME
DropSnapInstanceKey: patched,
}))
}
return nil
}
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