1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
package main
import (
"fmt"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/spf13/cobra"
"os"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/pkg/rootless"
"github.com/pkg/errors"
)
var (
execCommand cliconfig.ExecValues
execDescription = `
podman exec
Run a command in a running container
`
_execCommand = &cobra.Command{
Use: "exec",
Short: "Run a process in a running container",
Long: execDescription,
RunE: func(cmd *cobra.Command, args []string) error {
execCommand.InputArgs = args
execCommand.GlobalFlags = MainGlobalOpts
return execCmd(&execCommand)
},
Example: `podman exec -it ctrID ls
podman exec -it -w /tmp myCtr pwd
podman exec --user root ctrID ls`,
}
)
func init() {
execCommand.Command = _execCommand
execCommand.SetUsageTemplate(UsageTemplate())
flags := execCommand.Flags()
flags.SetInterspersed(false)
flags.StringSliceVarP(&execCommand.Env, "env", "e", []string{}, "Set environment variables")
flags.BoolVarP(&execCommand.Interfactive, "interactive", "i", false, "Not supported. All exec commands are interactive by default")
flags.BoolVarP(&execCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
flags.BoolVar(&execCommand.Privileged, "privileged", false, "Give the process extended Linux capabilities inside the container. The default is false")
flags.BoolVarP(&execCommand.Tty, "tty", "t", false, "Allocate a pseudo-TTY. The default is false")
flags.StringVarP(&execCommand.User, "user", "u", "", "Sets the username or UID used and optionally the groupname or GID for the specified command")
flags.StringVarP(&execCommand.Workdir, "workdir", "w", "", "Working directory inside the container")
}
func execCmd(c *cliconfig.ExecValues) error {
args := c.InputArgs
var ctr *libpod.Container
var err error
argStart := 1
if len(args) < 1 && !c.Latest {
return errors.Errorf("you must provide one container name or id")
}
if len(args) < 2 && !c.Latest {
return errors.Errorf("you must provide a command to exec")
}
if c.Latest {
argStart = 0
}
rootless.SetSkipStorageSetup(true)
cmd := args[argStart:]
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
if c.Latest {
ctr, err = runtime.GetLatestContainer()
} else {
ctr, err = runtime.LookupContainer(args[0])
}
if err != nil {
return errors.Wrapf(err, "unable to exec into %s", args[0])
}
pid, err := ctr.PID()
if err != nil {
return err
}
became, ret, err := rootless.JoinNS(uint(pid))
if err != nil {
return err
}
if became {
os.Exit(ret)
}
// ENVIRONMENT VARIABLES
env := map[string]string{}
if err := readKVStrings(env, []string{}, c.Env); err != nil {
return errors.Wrapf(err, "unable to process environment variables")
}
envs := []string{}
for k, v := range env {
envs = append(envs, fmt.Sprintf("%s=%s", k, v))
}
return ctr.Exec(c.Tty, c.Privileged, envs, cmd, c.User, c.Workdir)
}
|
