introduce `workingdir` option for docker exec

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

api/swagger.yaml

@@ -7269,6 +7269,9 @@ paths:
               User:
                 type: "string"
                 description: "The user, and optionally, group to run the exec process inside the container. Format is one of: `user`, `user:group`, `uid`, or `uid:gid`."
+              WorkingDir:
+                type: "string"
+                description: "The working directory for the exec process inside the container."
             example:
               AttachStdin: false
               AttachStdout: true

api/types/configs.go

@@ -50,6 +50,7 @@ type ExecConfig struct {
 	Detach       bool     // Execute in detach mode
 	DetachKeys   string   // Escape keys for detach
 	Env          []string // Environment variables
+	WorkingDir   string   // Working directory
 	Cmd          []string // Execution commands and args
 }
 

daemon/exec.go

@@ -122,6 +122,7 @@ func (d *Daemon) ContainerExecCreate(name string, config *types.ExecConfig) (str
 	execConfig.Tty = config.Tty
 	execConfig.Privileged = config.Privileged
 	execConfig.User = config.User
+	execConfig.WorkingDir = config.WorkingDir
 
 	linkedEnv, err := d.setupLinkedContainers(cntr)
 	if err != nil {
@@ -131,6 +132,9 @@ func (d *Daemon) ContainerExecCreate(name string, config *types.ExecConfig) (str
 	if len(execConfig.User) == 0 {
 		execConfig.User = cntr.Config.User
 	}
+	if len(execConfig.WorkingDir) == 0 {
+		execConfig.WorkingDir = cntr.Config.WorkingDir
+	}
 
 	d.registerExecCommand(cntr, execConfig)
 
@@ -211,7 +215,7 @@ func (d *Daemon) ContainerExecStart(ctx context.Context, name string, stdin io.R
 		Args:     append([]string{ec.Entrypoint}, ec.Args...),
 		Env:      ec.Env,
 		Terminal: ec.Tty,
-		Cwd:      c.Config.WorkingDir,
+		Cwd:      ec.WorkingDir,
 	}
 	if p.Cwd == "" {
 		p.Cwd = "/"

daemon/exec/exec.go

@@ -31,6 +31,7 @@ type Config struct {
 	Tty          bool
 	Privileged   bool
 	User         string
+	WorkingDir   string
 	Env          []string
 	Pid          int
 }