From 60953f20d3530b190c830fc814bed5ca943566bd Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Tue, 22 Nov 2022 13:25:49 +0000
Subject: [PATCH 01/11] feat: Add plumbing for motd file

---
 coderd/database/databasefake/databasefake.go  |   2 +
 coderd/database/dump.sql                      |   5 +-
 coderd/database/models.go                     |   2 +
 coderd/database/queries.sql.go                |  23 +-
 coderd/database/queries/workspaceagents.sql   |   5 +-
 coderd/database/sqlc.yaml                     |   1 +
 .../provisionerdserver/provisionerdserver.go  |   1 +
 provisioner/terraform/resources.go            |   2 +
 .../multiple-agents/multiple-agents.tf        |   1 +
 provisionersdk/proto/provisioner.pb.go        | 336 +++++++++---------
 provisionersdk/proto/provisioner.proto        |   1 +
 11 files changed, 206 insertions(+), 173 deletions(-)

diff --git a/coderd/database/databasefake/databasefake.go b/coderd/database/databasefake/databasefake.go
index 8b57f242a3f49..ae1551ba630cf 100644
--- a/coderd/database/databasefake/databasefake.go
+++ b/coderd/database/databasefake/databasefake.go
@@ -2363,6 +2363,7 @@ func (q *fakeQuerier) InsertWorkspaceAgent(_ context.Context, arg database.Inser
 		ResourceMetadata:         arg.ResourceMetadata,
 		ConnectionTimeoutSeconds: arg.ConnectionTimeoutSeconds,
 		TroubleshootingURL:       arg.TroubleshootingURL,
+		MOTDFile:                 arg.MOTDFile,
 	}
 
 	q.workspaceAgents = append(q.workspaceAgents, agent)
@@ -2895,6 +2896,7 @@ func (q *fakeQuerier) UpdateWorkspaceBuildByID(_ context.Context, arg database.U
 	}
 	return database.WorkspaceBuild{}, sql.ErrNoRows
 }
+
 func (q *fakeQuerier) UpdateWorkspaceBuildCostByID(_ context.Context, arg database.UpdateWorkspaceBuildCostByIDParams) (database.WorkspaceBuild, error) {
 	q.mutex.Lock()
 	defer q.mutex.Unlock()
diff --git a/coderd/database/dump.sql b/coderd/database/dump.sql
index be9c0c7b9c19f..c598280397c4d 100644
--- a/coderd/database/dump.sql
+++ b/coderd/database/dump.sql
@@ -413,7 +413,8 @@ CREATE TABLE workspace_agents (
     version text DEFAULT ''::text NOT NULL,
     last_connected_replica_id uuid,
     connection_timeout_seconds integer DEFAULT 0 NOT NULL,
-    troubleshooting_url text DEFAULT ''::text NOT NULL
+    troubleshooting_url text DEFAULT ''::text NOT NULL,
+    motd_file text DEFAULT ''::text NOT NULL
 );
 
 COMMENT ON COLUMN workspace_agents.version IS 'Version tracks the version of the currently running workspace agent. Workspace agents register their version upon start.';
@@ -422,6 +423,8 @@ COMMENT ON COLUMN workspace_agents.connection_timeout_seconds IS 'Connection tim
 
 COMMENT ON COLUMN workspace_agents.troubleshooting_url IS 'URL for troubleshooting the agent.';
 
+COMMENT ON COLUMN workspace_agents.motd_file IS 'Path to file inside workspace containing the message of the day (MOTD) to show to the user when logging in via SSH.';
+
 CREATE TABLE workspace_apps (
     id uuid NOT NULL,
     created_at timestamp with time zone NOT NULL,
diff --git a/coderd/database/models.go b/coderd/database/models.go
index 46e96a83e71b5..38ddb1a4b7b53 100644
--- a/coderd/database/models.go
+++ b/coderd/database/models.go
@@ -675,6 +675,8 @@ type WorkspaceAgent struct {
 	ConnectionTimeoutSeconds int32 `db:"connection_timeout_seconds" json:"connection_timeout_seconds"`
 	// URL for troubleshooting the agent.
 	TroubleshootingURL string `db:"troubleshooting_url" json:"troubleshooting_url"`
+	// Path to file inside workspace containing the message of the day (MOTD) to show to the user when logging in via SSH.
+	MOTDFile string `db:"motd_file" json:"motd_file"`
 }
 
 type WorkspaceApp struct {
diff --git a/coderd/database/queries.sql.go b/coderd/database/queries.sql.go
index d5bdd266b3bec..1f41ea479da04 100644
--- a/coderd/database/queries.sql.go
+++ b/coderd/database/queries.sql.go
@@ -4613,7 +4613,7 @@ func (q *sqlQuerier) UpdateUserStatus(ctx context.Context, arg UpdateUserStatusP
 
 const getWorkspaceAgentByAuthToken = `-- name: GetWorkspaceAgentByAuthToken :one
 SELECT
-	id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url
+	id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url, motd_file
 FROM
 	workspace_agents
 WHERE
@@ -4647,13 +4647,14 @@ func (q *sqlQuerier) GetWorkspaceAgentByAuthToken(ctx context.Context, authToken
 		&i.LastConnectedReplicaID,
 		&i.ConnectionTimeoutSeconds,
 		&i.TroubleshootingURL,
+		&i.MOTDFile,
 	)
 	return i, err
 }
 
 const getWorkspaceAgentByID = `-- name: GetWorkspaceAgentByID :one
 SELECT
-	id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url
+	id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url, motd_file
 FROM
 	workspace_agents
 WHERE
@@ -4685,13 +4686,14 @@ func (q *sqlQuerier) GetWorkspaceAgentByID(ctx context.Context, id uuid.UUID) (W
 		&i.LastConnectedReplicaID,
 		&i.ConnectionTimeoutSeconds,
 		&i.TroubleshootingURL,
+		&i.MOTDFile,
 	)
 	return i, err
 }
 
 const getWorkspaceAgentByInstanceID = `-- name: GetWorkspaceAgentByInstanceID :one
 SELECT
-	id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url
+	id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url, motd_file
 FROM
 	workspace_agents
 WHERE
@@ -4725,13 +4727,14 @@ func (q *sqlQuerier) GetWorkspaceAgentByInstanceID(ctx context.Context, authInst
 		&i.LastConnectedReplicaID,
 		&i.ConnectionTimeoutSeconds,
 		&i.TroubleshootingURL,
+		&i.MOTDFile,
 	)
 	return i, err
 }
 
 const getWorkspaceAgentsByResourceIDs = `-- name: GetWorkspaceAgentsByResourceIDs :many
 SELECT
-	id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url
+	id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url, motd_file
 FROM
 	workspace_agents
 WHERE
@@ -4769,6 +4772,7 @@ func (q *sqlQuerier) GetWorkspaceAgentsByResourceIDs(ctx context.Context, ids []
 			&i.LastConnectedReplicaID,
 			&i.ConnectionTimeoutSeconds,
 			&i.TroubleshootingURL,
+			&i.MOTDFile,
 		); err != nil {
 			return nil, err
 		}
@@ -4784,7 +4788,7 @@ func (q *sqlQuerier) GetWorkspaceAgentsByResourceIDs(ctx context.Context, ids []
 }
 
 const getWorkspaceAgentsCreatedAfter = `-- name: GetWorkspaceAgentsCreatedAfter :many
-SELECT id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url FROM workspace_agents WHERE created_at > $1
+SELECT id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url, motd_file FROM workspace_agents WHERE created_at > $1
 `
 
 func (q *sqlQuerier) GetWorkspaceAgentsCreatedAfter(ctx context.Context, createdAt time.Time) ([]WorkspaceAgent, error) {
@@ -4818,6 +4822,7 @@ func (q *sqlQuerier) GetWorkspaceAgentsCreatedAfter(ctx context.Context, created
 			&i.LastConnectedReplicaID,
 			&i.ConnectionTimeoutSeconds,
 			&i.TroubleshootingURL,
+			&i.MOTDFile,
 		); err != nil {
 			return nil, err
 		}
@@ -4850,10 +4855,11 @@ INSERT INTO
 		instance_metadata,
 		resource_metadata,
 		connection_timeout_seconds,
-		troubleshooting_url
+		troubleshooting_url,
+		motd_file
 	)
 VALUES
-	($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16) RETURNING id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url
+	($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17) RETURNING id, created_at, updated_at, name, first_connected_at, last_connected_at, disconnected_at, resource_id, auth_token, auth_instance_id, architecture, environment_variables, operating_system, startup_script, instance_metadata, resource_metadata, directory, version, last_connected_replica_id, connection_timeout_seconds, troubleshooting_url, motd_file
 `
 
 type InsertWorkspaceAgentParams struct {
@@ -4873,6 +4879,7 @@ type InsertWorkspaceAgentParams struct {
 	ResourceMetadata         pqtype.NullRawMessage `db:"resource_metadata" json:"resource_metadata"`
 	ConnectionTimeoutSeconds int32                 `db:"connection_timeout_seconds" json:"connection_timeout_seconds"`
 	TroubleshootingURL       string                `db:"troubleshooting_url" json:"troubleshooting_url"`
+	MOTDFile                 string                `db:"motd_file" json:"motd_file"`
 }
 
 func (q *sqlQuerier) InsertWorkspaceAgent(ctx context.Context, arg InsertWorkspaceAgentParams) (WorkspaceAgent, error) {
@@ -4893,6 +4900,7 @@ func (q *sqlQuerier) InsertWorkspaceAgent(ctx context.Context, arg InsertWorkspa
 		arg.ResourceMetadata,
 		arg.ConnectionTimeoutSeconds,
 		arg.TroubleshootingURL,
+		arg.MOTDFile,
 	)
 	var i WorkspaceAgent
 	err := row.Scan(
@@ -4917,6 +4925,7 @@ func (q *sqlQuerier) InsertWorkspaceAgent(ctx context.Context, arg InsertWorkspa
 		&i.LastConnectedReplicaID,
 		&i.ConnectionTimeoutSeconds,
 		&i.TroubleshootingURL,
+		&i.MOTDFile,
 	)
 	return i, err
 }
diff --git a/coderd/database/queries/workspaceagents.sql b/coderd/database/queries/workspaceagents.sql
index cdcf34f28eb96..12193013cec8d 100644
--- a/coderd/database/queries/workspaceagents.sql
+++ b/coderd/database/queries/workspaceagents.sql
@@ -55,10 +55,11 @@ INSERT INTO
 		instance_metadata,
 		resource_metadata,
 		connection_timeout_seconds,
-		troubleshooting_url
+		troubleshooting_url,
+		motd_file
 	)
 VALUES
-	($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16) RETURNING *;
+	($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17) RETURNING *;
 
 -- name: UpdateWorkspaceAgentConnectionByID :exec
 UPDATE
diff --git a/coderd/database/sqlc.yaml b/coderd/database/sqlc.yaml
index 564a82eba1309..cbd809334468e 100644
--- a/coderd/database/sqlc.yaml
+++ b/coderd/database/sqlc.yaml
@@ -53,3 +53,4 @@ rename:
   group_acl: GroupACL
   troubleshooting_url: TroubleshootingURL
   default_ttl: DefaultTTL
+  motd_file: MOTDFile
diff --git a/coderd/provisionerdserver/provisionerdserver.go b/coderd/provisionerdserver/provisionerdserver.go
index f3ecba76e6f47..0c3705f719c81 100644
--- a/coderd/provisionerdserver/provisionerdserver.go
+++ b/coderd/provisionerdserver/provisionerdserver.go
@@ -898,6 +898,7 @@ func InsertWorkspaceResource(ctx context.Context, db database.Store, jobID uuid.
 			},
 			ConnectionTimeoutSeconds: prAgent.GetConnectionTimeoutSeconds(),
 			TroubleshootingURL:       prAgent.GetTroubleshootingUrl(),
+			MOTDFile:                 prAgent.GetMotdFile(),
 		})
 		if err != nil {
 			return xerrors.Errorf("insert agent: %w", err)
diff --git a/provisioner/terraform/resources.go b/provisioner/terraform/resources.go
index e1fead516213b..d8c0581c59b6a 100644
--- a/provisioner/terraform/resources.go
+++ b/provisioner/terraform/resources.go
@@ -24,6 +24,7 @@ type agentAttributes struct {
 	StartupScript            string            `mapstructure:"startup_script"`
 	ConnectionTimeoutSeconds int32             `mapstructure:"connection_timeout"`
 	TroubleshootingURL       string            `mapstructure:"troubleshooting_url"`
+	MOTDFile                 string            `mapstructure:"motd_file"`
 }
 
 // A mapping of attributes on the "coder_app" resource.
@@ -130,6 +131,7 @@ func ConvertResources(module *tfjson.StateModule, rawGraph string) ([]*proto.Res
 			Directory:                attrs.Directory,
 			ConnectionTimeoutSeconds: attrs.ConnectionTimeoutSeconds,
 			TroubleshootingUrl:       attrs.TroubleshootingURL,
+			MotdFile:                 attrs.MOTDFile,
 		}
 		switch attrs.Auth {
 		case "token":
diff --git a/provisioner/terraform/testdata/multiple-agents/multiple-agents.tf b/provisioner/terraform/testdata/multiple-agents/multiple-agents.tf
index 48d34a3181239..2162965a29c38 100644
--- a/provisioner/terraform/testdata/multiple-agents/multiple-agents.tf
+++ b/provisioner/terraform/testdata/multiple-agents/multiple-agents.tf
@@ -16,6 +16,7 @@ resource "coder_agent" "dev2" {
   os                 = "darwin"
   arch               = "amd64"
   connection_timeout = 1
+  motd_file          = "/etc/motd"
 }
 
 resource "coder_agent" "dev3" {
diff --git a/provisionersdk/proto/provisioner.pb.go b/provisionersdk/proto/provisioner.pb.go
index 90db4232ba53f..c9b60b6a9ba3e 100644
--- a/provisionersdk/proto/provisioner.pb.go
+++ b/provisionersdk/proto/provisioner.pb.go
@@ -768,6 +768,7 @@ type Agent struct {
 	Auth                     isAgent_Auth `protobuf_oneof:"auth"`
 	ConnectionTimeoutSeconds int32        `protobuf:"varint,11,opt,name=connection_timeout_seconds,json=connectionTimeoutSeconds,proto3" json:"connection_timeout_seconds,omitempty"`
 	TroubleshootingUrl       string       `protobuf:"bytes,12,opt,name=troubleshooting_url,json=troubleshootingUrl,proto3" json:"troubleshooting_url,omitempty"`
+	MotdFile                 string       `protobuf:"bytes,13,opt,name=motd_file,json=motdFile,proto3" json:"motd_file,omitempty"`
 }
 
 func (x *Agent) Reset() {
@@ -893,6 +894,13 @@ func (x *Agent) GetTroubleshootingUrl() string {
 	return ""
 }
 
+func (x *Agent) GetMotdFile() string {
+	if x != nil {
+		return x.MotdFile
+	}
+	return ""
+}
+
 type isAgent_Auth interface {
 	isAgent_Auth()
 }
@@ -2145,7 +2153,7 @@ var file_provisionersdk_proto_provisioner_proto_rawDesc = []byte{
 	0x70, 0x75, 0x74, 0x22, 0x37, 0x0a, 0x14, 0x49, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x63, 0x65, 0x49,
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+	0x52, 0x0a, 0x69, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x63, 0x65, 0x49, 0x64, 0x22, 0x9b, 0x04, 0x0a,
 	0x05, 0x41, 0x67, 0x65, 0x6e, 0x74, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01,
 	0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02,
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@@ -2173,170 +2181,172 @@ var file_provisionersdk_proto_provisioner_proto_rawDesc = []byte{
 	0x6d, 0x65, 0x6f, 0x75, 0x74, 0x53, 0x65, 0x63, 0x6f, 0x6e, 0x64, 0x73, 0x12, 0x2f, 0x0a, 0x13,
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+	0x72, 0x6f, 0x76, 0x69, 0x73, 0x69, 0x6f, 0x6e, 0x65, 0x72, 0x73, 0x64, 0x6b, 0x2f, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/provisionersdk/proto/provisioner.proto b/provisionersdk/proto/provisioner.proto
index fd4a55e741f54..a4d1b0f8bf64c 100644
--- a/provisionersdk/proto/provisioner.proto
+++ b/provisionersdk/proto/provisioner.proto
@@ -87,6 +87,7 @@ message Agent {
     }
 	int32 connection_timeout_seconds = 11;
 	string troubleshooting_url = 12;
+	string motd_file = 13;
 }
 
 enum AppSharingLevel {

From 797001bed77d531f0b68d380140a9e09b674024d Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Tue, 22 Nov 2022 14:57:36 +0000
Subject: [PATCH 02/11] feat: Print motd on SSH login sessions

---
 agent/agent.go              | 88 ++++++++++++++++++++++++++++++++-----
 coderd/workspaceagents.go   |  1 +
 codersdk/workspaceagents.go |  1 +
 3 files changed, 80 insertions(+), 10 deletions(-)

diff --git a/agent/agent.go b/agent/agent.go
index fe0f6a7b0d36e..da322e8fe3a78 100644
--- a/agent/agent.go
+++ b/agent/agent.go
@@ -1,6 +1,7 @@
 package agent
 
 import (
+	"bufio"
 	"context"
 	"crypto/rand"
 	"crypto/rsa"
@@ -675,6 +676,18 @@ func (a *agent) handleSSHSession(session ssh.Session) (retErr error) {
 		// See https://github.com/coder/coder/issues/3371.
 		session.DisablePTYEmulation()
 
+		if !isQuietLogin(session.RawCommand()) {
+			metadata, ok := a.metadata.Load().(codersdk.WorkspaceAgentMetadata)
+			if ok {
+				err = showMOTD(session, metadata.MOTDFile)
+				if err != nil {
+					a.logger.Error(ctx, "show MOTD", slog.Error(err))
+				}
+			} else {
+				a.logger.Warn(ctx, "metadata lookup failed, unable to show MOTD")
+			}
+		}
+
 		cmd.Env = append(cmd.Env, fmt.Sprintf("TERM=%s", sshPty.Term))
 
 		// The pty package sets `SSH_TTY` on supported platforms.
@@ -1000,19 +1013,74 @@ func Bicopy(ctx context.Context, c1, c2 io.ReadWriteCloser) {
 	}
 }
 
-// ExpandRelativeHomePath expands the tilde at the beginning of a path to the
-// current user's home directory and returns a full absolute path.
-func ExpandRelativeHomePath(in string) (string, error) {
-	usr, err := user.Current()
+// isQuietLogin checks if the SSH server should perform a quiet login or not.
+//
+// https://github.com/openssh/openssh-portable/blob/25bd659cc72268f2858c5415740c442ee950049f/session.c#L816
+func isQuietLogin(rawCommand string) bool {
+	// We are always quiet unless this is a login shell.
+	if len(rawCommand) != 0 {
+		return true
+	}
+
+	// Best effort, if we can't get the home directory,
+	// we can't lookup .hushlogin.
+	homedir, err := getHomeDir()
+	if err == nil {
+		if _, err := os.Stat(filepath.Join(homedir, ".hushlogin")); err == nil {
+			return true
+		}
+	}
+
+	return false
+}
+
+// showMOTD will output the message of the day from
+// the given filename to dest, if the file exists.
+//
+// https://github.com/openssh/openssh-portable/blob/25bd659cc72268f2858c5415740c442ee950049f/session.c#L784
+func showMOTD(dest io.Writer, filename string) error {
+	if filename == "" {
+		return nil
+	}
+
+	f, err := os.Open(filename)
 	if err != nil {
-		return "", xerrors.Errorf("get current user details: %w", err)
+		if xerrors.Is(err, os.ErrNotExist) {
+			// This is not an error, there simply isn't a MOTD to show.
+			return nil
+		}
+		return xerrors.Errorf("open MOTD: %w", err)
 	}
+	defer f.Close()
 
-	if in == "~" {
-		in = usr.HomeDir
-	} else if strings.HasPrefix(in, "~/") {
-		in = filepath.Join(usr.HomeDir, in[2:])
+	s := bufio.NewScanner(f)
+	for s.Scan() {
+		// Carriage return ensures each line starts
+		// at the beginning of the terminal.
+		_, err = fmt.Fprint(dest, s.Text()+"\r\n")
+		if err != nil {
+			return xerrors.Errorf("write MOTD: %w", err)
+		}
+	}
+	if err := s.Err(); err != nil {
+		return xerrors.Errorf("read MOTD: %w", err)
 	}
 
-	return filepath.Abs(in)
+	return nil
+}
+
+// getHomeDir returns the home directory of the current user, giving
+// priority to the $HOME environment variable.
+func getHomeDir() (string, error) {
+	// First we check the environment.
+	homedir, err := os.UserHomeDir()
+	if err != nil {
+		// As a fallback, we try the user information.
+		u, err := user.Current()
+		if err != nil {
+			return "", xerrors.Errorf("current user: %w", err)
+		}
+		return u.HomeDir, nil
+	}
+	return homedir, nil
 }
diff --git a/coderd/workspaceagents.go b/coderd/workspaceagents.go
index 21b6d83b599c3..bf3732ee52849 100644
--- a/coderd/workspaceagents.go
+++ b/coderd/workspaceagents.go
@@ -132,6 +132,7 @@ func (api *API) workspaceAgentMetadata(rw http.ResponseWriter, r *http.Request)
 		StartupScript:        apiAgent.StartupScript,
 		Directory:            apiAgent.Directory,
 		VSCodePortProxyURI:   vscodeProxyURI,
+		MOTDFile:             workspaceAgent.MOTDFile,
 	})
 }
 
diff --git a/codersdk/workspaceagents.go b/codersdk/workspaceagents.go
index f90e615de8917..63b895a2091e9 100644
--- a/codersdk/workspaceagents.go
+++ b/codersdk/workspaceagents.go
@@ -131,6 +131,7 @@ type WorkspaceAgentMetadata struct {
 	EnvironmentVariables map[string]string `json:"environment_variables"`
 	StartupScript        string            `json:"startup_script"`
 	Directory            string            `json:"directory"`
+	MOTDFile             string            `json:"motd_file"`
 }
 
 // AuthWorkspaceGoogleInstanceIdentity uses the Google Compute Engine Metadata API to

From 5657cb0bc46b175e79a6827f7fc3797c41583551 Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Tue, 22 Nov 2022 14:58:48 +0000
Subject: [PATCH 03/11] chore: Unify homedir lookup in agent

---
 agent/agent.go | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/agent/agent.go b/agent/agent.go
index da322e8fe3a78..f9415b05d0f99 100644
--- a/agent/agent.go
+++ b/agent/agent.go
@@ -480,12 +480,11 @@ func (a *agent) init(ctx context.Context) {
 				var opts []sftp.ServerOption
 				// Change current working directory to the users home
 				// directory so that SFTP connections land there.
-				// https://github.com/coder/coder/issues/3620
-				u, err := user.Current()
+				homedir, err := getHomeDir()
 				if err != nil {
-					sshLogger.Warn(ctx, "get sftp working directory failed, unable to get current user", slog.Error(err))
+					sshLogger.Warn(ctx, "get sftp working directory failed, unable to get home dir", slog.Error(err))
 				} else {
-					opts = append(opts, sftp.WithServerWorkingDirectory(u.HomeDir))
+					opts = append(opts, sftp.WithServerWorkingDirectory(homedir))
 				}
 
 				server, err := sftp.NewServer(session, opts...)
@@ -599,8 +598,12 @@ func (a *agent) createCommand(ctx context.Context, rawCommand string, env []stri
 	cmd := exec.CommandContext(ctx, shell, args...)
 	cmd.Dir = metadata.Directory
 	if cmd.Dir == "" {
-		// Default to $HOME if a directory is not set!
-		cmd.Dir = os.Getenv("HOME")
+		// Default to user home if a directory is not set.
+		homedir, err := getHomeDir()
+		if err != nil {
+			return nil, xerrors.Errorf("get home dir: %w", err)
+		}
+		cmd.Dir = homedir
 	}
 	cmd.Env = append(os.Environ(), env...)
 	executablePath, err := os.Executable()

From df9bd37e171d49428ea69bbf9f3072841f9ad794 Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Tue, 22 Nov 2022 15:01:26 +0000
Subject: [PATCH 04/11] chore: Add terraform test for motd_file

---
 provisioner/terraform/resources_test.go               |  1 +
 .../testdata/multiple-agents/multiple-agents.tf       |  2 +-
 .../multiple-agents/multiple-agents.tfplan.json       | 11 ++++++++++-
 .../multiple-agents/multiple-agents.tfstate.json      |  3 +++
 4 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/provisioner/terraform/resources_test.go b/provisioner/terraform/resources_test.go
index 781f3ae5d0bea..ebcc07dc84a16 100644
--- a/provisioner/terraform/resources_test.go
+++ b/provisioner/terraform/resources_test.go
@@ -99,6 +99,7 @@ func TestConvertResources(t *testing.T) {
 				Architecture:             "amd64",
 				Auth:                     &proto.Agent_Token{},
 				ConnectionTimeoutSeconds: 1,
+				MotdFile:                 "/etc/motd",
 			}, {
 				Name:                     "dev3",
 				OperatingSystem:          "windows",
diff --git a/provisioner/terraform/testdata/multiple-agents/multiple-agents.tf b/provisioner/terraform/testdata/multiple-agents/multiple-agents.tf
index 2162965a29c38..ca40d81479532 100644
--- a/provisioner/terraform/testdata/multiple-agents/multiple-agents.tf
+++ b/provisioner/terraform/testdata/multiple-agents/multiple-agents.tf
@@ -2,7 +2,7 @@ terraform {
   required_providers {
     coder = {
       source  = "coder/coder"
-      version = "0.6.1"
+      version = "0.6.4"
     }
   }
 }
diff --git a/provisioner/terraform/testdata/multiple-agents/multiple-agents.tfplan.json b/provisioner/terraform/testdata/multiple-agents/multiple-agents.tfplan.json
index a6c92cf1e4fb2..66ec6c3d868b2 100644
--- a/provisioner/terraform/testdata/multiple-agents/multiple-agents.tfplan.json
+++ b/provisioner/terraform/testdata/multiple-agents/multiple-agents.tfplan.json
@@ -17,6 +17,7 @@
             "connection_timeout": 120,
             "dir": null,
             "env": null,
+            "motd_file": null,
             "os": "linux",
             "startup_script": null,
             "troubleshooting_url": null
@@ -36,6 +37,7 @@
             "connection_timeout": 1,
             "dir": null,
             "env": null,
+            "motd_file": "/etc/motd",
             "os": "darwin",
             "startup_script": null,
             "troubleshooting_url": null
@@ -55,6 +57,7 @@
             "connection_timeout": 120,
             "dir": null,
             "env": null,
+            "motd_file": null,
             "os": "windows",
             "startup_script": null,
             "troubleshooting_url": "https://coder.com/troubleshoot"
@@ -94,6 +97,7 @@
           "connection_timeout": 120,
           "dir": null,
           "env": null,
+          "motd_file": null,
           "os": "linux",
           "startup_script": null,
           "troubleshooting_url": null
@@ -126,6 +130,7 @@
           "connection_timeout": 1,
           "dir": null,
           "env": null,
+          "motd_file": "/etc/motd",
           "os": "darwin",
           "startup_script": null,
           "troubleshooting_url": null
@@ -158,6 +163,7 @@
           "connection_timeout": 120,
           "dir": null,
           "env": null,
+          "motd_file": null,
           "os": "windows",
           "startup_script": null,
           "troubleshooting_url": "https://coder.com/troubleshoot"
@@ -200,7 +206,7 @@
       "coder": {
         "name": "coder",
         "full_name": "registry.terraform.io/coder/coder",
-        "version_constraint": "0.6.1"
+        "version_constraint": "0.6.4"
       },
       "null": {
         "name": "null",
@@ -238,6 +244,9 @@
             "connection_timeout": {
               "constant_value": 1
             },
+            "motd_file": {
+              "constant_value": "/etc/motd"
+            },
             "os": {
               "constant_value": "darwin"
             }
diff --git a/provisioner/terraform/testdata/multiple-agents/multiple-agents.tfstate.json b/provisioner/terraform/testdata/multiple-agents/multiple-agents.tfstate.json
index eebfce2376cd5..68db0a20abf8d 100644
--- a/provisioner/terraform/testdata/multiple-agents/multiple-agents.tfstate.json
+++ b/provisioner/terraform/testdata/multiple-agents/multiple-agents.tfstate.json
@@ -19,6 +19,7 @@
             "env": null,
             "id": "e545d734-f852-4fda-ac8f-39e3ff094e58",
             "init_script": "",
+            "motd_file": null,
             "os": "linux",
             "startup_script": null,
             "token": "c2c47266-af7a-467c-9ffc-30c3270ffecb",
@@ -41,6 +42,7 @@
             "env": null,
             "id": "b5e18556-d202-478f-80d9-76f34a4cb105",
             "init_script": "",
+            "motd_file": "/etc/motd",
             "os": "darwin",
             "startup_script": null,
             "token": "795082f9-642a-4647-a595-6539edaa74a3",
@@ -63,6 +65,7 @@
             "env": null,
             "id": "27e1114a-bc92-4e35-ab57-1680f3b7658f",
             "init_script": "",
+            "motd_file": null,
             "os": "windows",
             "startup_script": null,
             "token": "c4fc1679-eb42-4d9f-bca8-fcf9641a7256",

From 36dc4461e7d60237a2ddba33105d96bcef2e22c6 Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Tue, 22 Nov 2022 15:41:13 +0000
Subject: [PATCH 05/11] Add motd and hushlogin test

---
 agent/agent_test.go | 81 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)

diff --git a/agent/agent_test.go b/agent/agent_test.go
index 92a5fe6d0f149..ee4711bb3347b 100644
--- a/agent/agent_test.go
+++ b/agent/agent_test.go
@@ -2,6 +2,7 @@ package agent_test
 
 import (
 	"bufio"
+	"bytes"
 	"context"
 	"encoding/json"
 	"fmt"
@@ -193,6 +194,86 @@ func TestAgent(t *testing.T) {
 		}
 	})
 
+	t.Run("Session TTY MOTD", func(t *testing.T) {
+		t.Parallel()
+
+		if runtime.GOOS == "windows" {
+			// This might be our implementation, or ConPTY itself.
+			// It's difficult to find extensive tests for it, so
+			// it seems like it could be either.
+			t.Skip("ConPTY appears to be inconsistent on Windows.")
+		}
+
+		wantMOTD := "Welcome to your Coder workspace!"
+
+		name := filepath.Join(t.TempDir(), "motd")
+		err := os.WriteFile(name, []byte(wantMOTD), 0o600)
+		require.NoError(t, err, "write motd file")
+
+		session := setupSSHSession(t, codersdk.WorkspaceAgentMetadata{
+			MOTDFile: name,
+		})
+		err = session.RequestPty("xterm", 128, 128, ssh.TerminalModes{})
+		require.NoError(t, err)
+
+		ptty := ptytest.New(t)
+		var stdout bytes.Buffer
+		session.Stdout = &stdout
+		session.Stderr = ptty.Output()
+		session.Stdin = ptty.Input()
+		err = session.Start("")
+		require.NoError(t, err)
+
+		ptty.WriteLine("exit")
+		err = session.Wait()
+		require.NoError(t, err)
+
+		require.Contains(t, stdout.String(), wantMOTD, "should show motd")
+	})
+
+	//nolint:paralleltest // This test sets an environment variable.
+	t.Run("Session TTY Hushlogin", func(t *testing.T) {
+		if runtime.GOOS == "windows" {
+			// This might be our implementation, or ConPTY itself.
+			// It's difficult to find extensive tests for it, so
+			// it seems like it could be either.
+			t.Skip("ConPTY appears to be inconsistent on Windows.")
+		}
+
+		wantNotMOTD := "Welcome to your Coder workspace!"
+
+		tmpdir := t.TempDir()
+		name := filepath.Join(tmpdir, "motd")
+		err := os.WriteFile(name, []byte(wantNotMOTD), 0o600)
+		require.NoError(t, err, "write motd file")
+		f, err := os.Create(filepath.Join(tmpdir, ".hushlogin"))
+		require.NoError(t, err, "create .hushlogin file")
+		err = f.Close()
+		require.NoError(t, err, "close .hushlogin file")
+
+		t.Setenv("HOME", tmpdir)
+
+		session := setupSSHSession(t, codersdk.WorkspaceAgentMetadata{
+			MOTDFile: name,
+		})
+		err = session.RequestPty("xterm", 128, 128, ssh.TerminalModes{})
+		require.NoError(t, err)
+
+		ptty := ptytest.New(t)
+		var stdout bytes.Buffer
+		session.Stdout = &stdout
+		session.Stderr = ptty.Output()
+		session.Stdin = ptty.Input()
+		err = session.Start("")
+		require.NoError(t, err)
+
+		ptty.WriteLine("exit")
+		err = session.Wait()
+		require.NoError(t, err)
+
+		require.NotContains(t, stdout.String(), wantNotMOTD, "should not show motd")
+	})
+
 	t.Run("LocalForwarding", func(t *testing.T) {
 		t.Parallel()
 		random, err := net.Listen("tcp", "127.0.0.1:0")

From 80d35ebdcbf01385f3c6755dad92a606c98f99ec Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Tue, 22 Nov 2022 17:40:15 +0000
Subject: [PATCH 06/11] Start session Shell vs Run

---
 agent/agent_test.go | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/agent/agent_test.go b/agent/agent_test.go
index ee4711bb3347b..8c500a11b0ef4 100644
--- a/agent/agent_test.go
+++ b/agent/agent_test.go
@@ -221,10 +221,10 @@ func TestAgent(t *testing.T) {
 		session.Stdout = &stdout
 		session.Stderr = ptty.Output()
 		session.Stdin = ptty.Input()
-		err = session.Start("")
+		err = session.Shell()
 		require.NoError(t, err)
 
-		ptty.WriteLine("exit")
+		ptty.WriteLine("exit 0")
 		err = session.Wait()
 		require.NoError(t, err)
 
@@ -264,10 +264,10 @@ func TestAgent(t *testing.T) {
 		session.Stdout = &stdout
 		session.Stderr = ptty.Output()
 		session.Stdin = ptty.Input()
-		err = session.Start("")
+		err = session.Shell()
 		require.NoError(t, err)
 
-		ptty.WriteLine("exit")
+		ptty.WriteLine("exit 0")
 		err = session.Wait()
 		require.NoError(t, err)
 

From eabc6bd36a5a5418b4164a1f458173b25181879a Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Tue, 22 Nov 2022 17:59:46 +0000
Subject: [PATCH 07/11] Add migrations

---
 .../migrations/000082_add_motd_file_to_coder_agents.down.sql  | 2 ++
 .../migrations/000082_add_motd_file_to_coder_agents.up.sql    | 4 ++++
 2 files changed, 6 insertions(+)
 create mode 100644 coderd/database/migrations/000082_add_motd_file_to_coder_agents.down.sql
 create mode 100644 coderd/database/migrations/000082_add_motd_file_to_coder_agents.up.sql

diff --git a/coderd/database/migrations/000082_add_motd_file_to_coder_agents.down.sql b/coderd/database/migrations/000082_add_motd_file_to_coder_agents.down.sql
new file mode 100644
index 0000000000000..55828f74ecd4d
--- /dev/null
+++ b/coderd/database/migrations/000082_add_motd_file_to_coder_agents.down.sql
@@ -0,0 +1,2 @@
+ALTER TABLE workspace_agents
+	DROP COLUMN motd_file;
diff --git a/coderd/database/migrations/000082_add_motd_file_to_coder_agents.up.sql b/coderd/database/migrations/000082_add_motd_file_to_coder_agents.up.sql
new file mode 100644
index 0000000000000..567dad3bf8f19
--- /dev/null
+++ b/coderd/database/migrations/000082_add_motd_file_to_coder_agents.up.sql
@@ -0,0 +1,4 @@
+ALTER TABLE workspace_agents
+	ADD COLUMN motd_file text NOT NULL DEFAULT '';
+
+COMMENT ON COLUMN workspace_agents.motd_file IS 'Path to file inside workspace containing the message of the day (MOTD) to show to the user when logging in via SSH.';

From 2d7c6af8f28f22b4c81880f2c53c58366ca8ae67 Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Wed, 23 Nov 2022 10:04:04 +0000
Subject: [PATCH 08/11] fix: Set HOME for motd test as well

---
 .vscode/settings.json |  1 +
 agent/agent_test.go   | 12 +++++++++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/.vscode/settings.json b/.vscode/settings.json
index b63792e2477fc..4a0ab16e558ed 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -128,6 +128,7 @@
     "tfplan",
     "tfstate",
     "tios",
+    "tmpdir",
     "tparallel",
     "trialer",
     "trimprefix",
diff --git a/agent/agent_test.go b/agent/agent_test.go
index 8c500a11b0ef4..bc9f923e76987 100644
--- a/agent/agent_test.go
+++ b/agent/agent_test.go
@@ -194,9 +194,8 @@ func TestAgent(t *testing.T) {
 		}
 	})
 
+	//nolint:paralleltest // This test sets an environment variable.
 	t.Run("Session TTY MOTD", func(t *testing.T) {
-		t.Parallel()
-
 		if runtime.GOOS == "windows" {
 			// This might be our implementation, or ConPTY itself.
 			// It's difficult to find extensive tests for it, so
@@ -206,10 +205,14 @@ func TestAgent(t *testing.T) {
 
 		wantMOTD := "Welcome to your Coder workspace!"
 
-		name := filepath.Join(t.TempDir(), "motd")
+		tmpdir := t.TempDir()
+		name := filepath.Join(tmpdir, "motd")
 		err := os.WriteFile(name, []byte(wantMOTD), 0o600)
 		require.NoError(t, err, "write motd file")
 
+		// Set HOME so we can ensure no ~/.hushlogin is present.
+		t.Setenv("HOME", tmpdir)
+
 		session := setupSSHSession(t, codersdk.WorkspaceAgentMetadata{
 			MOTDFile: name,
 		})
@@ -246,11 +249,14 @@ func TestAgent(t *testing.T) {
 		name := filepath.Join(tmpdir, "motd")
 		err := os.WriteFile(name, []byte(wantNotMOTD), 0o600)
 		require.NoError(t, err, "write motd file")
+
+		// Create hushlogin to silence motd.
 		f, err := os.Create(filepath.Join(tmpdir, ".hushlogin"))
 		require.NoError(t, err, "create .hushlogin file")
 		err = f.Close()
 		require.NoError(t, err, "close .hushlogin file")
 
+		// Set HOME so we can ensure ~/.hushlogin is present.
 		t.Setenv("HOME", tmpdir)
 
 		session := setupSSHSession(t, codersdk.WorkspaceAgentMetadata{

From 5dba999e5845e02e0c54273f70b4acfc7b0b54c0 Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Wed, 23 Nov 2022 10:58:07 +0000
Subject: [PATCH 09/11] Rename migrations

---
 ...nts.down.sql => 000083_add_motd_file_to_coder_agents.down.sql} | 0
 ..._agents.up.sql => 000083_add_motd_file_to_coder_agents.up.sql} | 0
 2 files changed, 0 insertions(+), 0 deletions(-)
 rename coderd/database/migrations/{000082_add_motd_file_to_coder_agents.down.sql => 000083_add_motd_file_to_coder_agents.down.sql} (100%)
 rename coderd/database/migrations/{000082_add_motd_file_to_coder_agents.up.sql => 000083_add_motd_file_to_coder_agents.up.sql} (100%)

diff --git a/coderd/database/migrations/000082_add_motd_file_to_coder_agents.down.sql b/coderd/database/migrations/000083_add_motd_file_to_coder_agents.down.sql
similarity index 100%
rename from coderd/database/migrations/000082_add_motd_file_to_coder_agents.down.sql
rename to coderd/database/migrations/000083_add_motd_file_to_coder_agents.down.sql
diff --git a/coderd/database/migrations/000082_add_motd_file_to_coder_agents.up.sql b/coderd/database/migrations/000083_add_motd_file_to_coder_agents.up.sql
similarity index 100%
rename from coderd/database/migrations/000082_add_motd_file_to_coder_agents.up.sql
rename to coderd/database/migrations/000083_add_motd_file_to_coder_agents.up.sql

From 073544f9dbbf152dabd949218aa3b1393857e51c Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Thu, 24 Nov 2022 10:37:00 +0000
Subject: [PATCH 10/11] Amend PR comments

---
 agent/agent.go | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/agent/agent.go b/agent/agent.go
index f9415b05d0f99..9fd3d99320af3 100644
--- a/agent/agent.go
+++ b/agent/agent.go
@@ -1028,13 +1028,12 @@ func isQuietLogin(rawCommand string) bool {
 	// Best effort, if we can't get the home directory,
 	// we can't lookup .hushlogin.
 	homedir, err := getHomeDir()
-	if err == nil {
-		if _, err := os.Stat(filepath.Join(homedir, ".hushlogin")); err == nil {
-			return true
-		}
+	if err != nil {
+		return false
 	}
 
-	return false
+	_, err = os.Stat(filepath.Join(homedir, ".hushlogin"))
+	return err == nil
 }
 
 // showMOTD will output the message of the day from
@@ -1077,13 +1076,14 @@ func showMOTD(dest io.Writer, filename string) error {
 func getHomeDir() (string, error) {
 	// First we check the environment.
 	homedir, err := os.UserHomeDir()
+	if err == nil {
+		return homedir, nil
+	}
+
+	// As a fallback, we try the user information.
+	u, err := user.Current()
 	if err != nil {
-		// As a fallback, we try the user information.
-		u, err := user.Current()
-		if err != nil {
-			return "", xerrors.Errorf("current user: %w", err)
-		}
-		return u.HomeDir, nil
+		return "", xerrors.Errorf("current user: %w", err)
 	}
-	return homedir, nil
+	return u.HomeDir, nil
 }

From 9e6ca996e19878cfb255e6a178dc3dcc5222e4ec Mon Sep 17 00:00:00 2001
From: Mathias Fredriksson <mafredri@gmail.com>
Date: Thu, 24 Nov 2022 10:40:31 +0000
Subject: [PATCH 11/11] s/getHomeDir/userHomeDir/ get is less idiomatic

---
 agent/agent.go | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/agent/agent.go b/agent/agent.go
index 9fd3d99320af3..bb40e27aa97e6 100644
--- a/agent/agent.go
+++ b/agent/agent.go
@@ -480,7 +480,7 @@ func (a *agent) init(ctx context.Context) {
 				var opts []sftp.ServerOption
 				// Change current working directory to the users home
 				// directory so that SFTP connections land there.
-				homedir, err := getHomeDir()
+				homedir, err := userHomeDir()
 				if err != nil {
 					sshLogger.Warn(ctx, "get sftp working directory failed, unable to get home dir", slog.Error(err))
 				} else {
@@ -599,7 +599,7 @@ func (a *agent) createCommand(ctx context.Context, rawCommand string, env []stri
 	cmd.Dir = metadata.Directory
 	if cmd.Dir == "" {
 		// Default to user home if a directory is not set.
-		homedir, err := getHomeDir()
+		homedir, err := userHomeDir()
 		if err != nil {
 			return nil, xerrors.Errorf("get home dir: %w", err)
 		}
@@ -1027,7 +1027,7 @@ func isQuietLogin(rawCommand string) bool {
 
 	// Best effort, if we can't get the home directory,
 	// we can't lookup .hushlogin.
-	homedir, err := getHomeDir()
+	homedir, err := userHomeDir()
 	if err != nil {
 		return false
 	}
@@ -1071,9 +1071,9 @@ func showMOTD(dest io.Writer, filename string) error {
 	return nil
 }
 
-// getHomeDir returns the home directory of the current user, giving
+// userHomeDir returns the home directory of the current user, giving
 // priority to the $HOME environment variable.
-func getHomeDir() (string, error) {
+func userHomeDir() (string, error) {
 	// First we check the environment.
 	homedir, err := os.UserHomeDir()
 	if err == nil {