Tweak fim kill approach so ALL sub-processes are also killed (this is really important since it's a bash script presently)

ui/slideshow.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"log"
 	"os/exec"
+	"syscall"
 	"time"
 
 	"github.com/eiannone/keyboard"
@@ -21,6 +22,8 @@ func Slideshow() {
 
 	// Run slideshow
 	fim = exec.Command(CMD_FIM)
+	// Put fim into a process group so ALL processes that may be executed are exited when main process exits
+	fim.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 
 	// Setup stdin for fim to control slideshow
 	stdin, err := fim.StdinPipe()
@@ -79,10 +82,14 @@ func Slideshow() {
 				// Exit fim and move to the config UI
 				if event.Key == keyboard.KeyEsc || event.Key == keyboard.KeyEnter || event.Key == keyboard.KeySpace {
 					if fim != nil { // Just in case someone lays on exit key or similar during startup
-						if err := fim.Process.Kill(); err != nil {
+						pgid, err := syscall.Getpgid(fim.Process.Pid)
+						if err == nil {
+							if err := syscall.Kill(-pgid, 9); err != nil {
 								log.Fatalf("failed to kill fim : %s", err)
 							}
 						}
+
+					}
 					break
 				}