Add overmind signal command

cmd_signal.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/DarthSim/overmind/v2/utils"
+	"github.com/urfave/cli"
+)
+
+type cmdSignalHandler struct{ dialer }
+
+func (h *cmdSignalHandler) Run(c *cli.Context) error {
+	if len(c.Args()) < 1 {
+		utils.Fatal("Signal name is required")
+	}
+
+	conn, err := h.Dial()
+	utils.FatalOnErr(err)
+
+	fmt.Fprintf(conn, "signal %v\n", strings.Join(c.Args(), " "))
+
+	return nil
+}

main.go

@@ -125,6 +125,18 @@ func setupQuitCmd() cli.Command {
 	}
 }
 
+func setupSignalCmd() cli.Command {
+	c := cmdSignalHandler{}
+
+	return cli.Command{
+		Name:      "signal",
+		Usage:     "Send a signal to specified processes (or all if none specified)",
+		Action:    c.Run,
+		ArgsUsage: "<signal> [process name...]",
+		Flags:     socketFlags(&c.SocketPath, &c.Network),
+	}
+}
+
 func setupKillCmd() cli.Command {
 	c := cmdKillHandler{}
 
@@ -192,6 +204,7 @@ func main() {
 		setupStartCmd(),
 		setupRestartCmd(),
 		setupStopCmd(),
+		setupSignalCmd(),
 		setupConnectCmd(),
 		setupQuitCmd(),
 		setupKillCmd(),

start/command_center.go

@@ -84,6 +84,8 @@ func (c *commandCenter) handleConnection(conn net.Conn) {
 			c.processRestart(args)
 		case "stop":
 			c.processStop(args)
+		case "signal":
+			c.processSignal(args)
 		case "quit":
 			c.processQuit()
 		case "kill":
@@ -132,6 +134,33 @@ func (c *commandCenter) processStop(args []string) {
 	}
 }
 
+func (c *commandCenter) processSignal(args []string) {
+	if len(args) == 0 {
+		return
+	}
+
+	sig, ok := signalMap[args[0]]
+	if !ok {
+		return
+	}
+
+	processes := args[1:]
+
+	for _, p := range c.cmd.processes {
+		if len(processes) == 0 {
+			p.Signal(sig)
+			continue
+		}
+
+		for _, pattern := range processes {
+			if utils.WildcardMatch(pattern, p.Name) {
+				p.Signal(sig)
+				break
+			}
+		}
+	}
+}
+
 func (c *commandCenter) processKill() {
 	for _, p := range c.cmd.processes {
 		p.Kill(false)

start/handler.go

@@ -16,6 +16,7 @@ import (
 
 var signalMap = map[string]syscall.Signal{
 	"ABRT": syscall.SIGABRT,
+	"HUP":  syscall.SIGHUP,
 	"INT":  syscall.SIGINT,
 	"KILL": syscall.SIGKILL,
 	"QUIT": syscall.SIGQUIT,

start/process.go

@@ -130,6 +130,15 @@ func (p *process) Kill(keepAlive bool) {
 	}
 }
 
+func (p *process) Signal(sig syscall.Signal) {
+	if p.Running() {
+		p.output.WriteBoldLinef(p, "Sending signal %v...", sig)
+		if err := p.groupSignal(sig); err != nil {
+			p.output.WriteErr(p, fmt.Errorf("Can't send signal: %s", err))
+		}
+	}
+}
+
 func (p *process) Info() {
 	p.groupSignal(SIGINFO)
 }