Remove usage of pkill (fix #286)

lib/Controller/VideoController.php

@@ -234,7 +234,7 @@ class VideoController extends ApiBase
         $env .= "FFMPEG='{$ffmpegPath}' FFPROBE='{$ffprobePath}' GOVOD_TEMPDIR='{$tmpPath}/go-vod' ";
 
         // Check if already running
-        exec("pkill {$transcoder}");
+        \OCA\Memories\Util::pkill($transcoder);
         shell_exec("{$env} nohup {$transcoder} > {$tmpPath}/go-vod.log 2>&1 & > /dev/null");
 
         // wait for 1s and try again

lib/Migration/Repair.php

@@ -25,7 +25,7 @@ class Repair implements IRepairStep
     public function run(IOutput $output): void
     {
         // kill any instances of go-transcode and go-vod
-        shell_exec('pkill go-transcode');
-        shell_exec('pkill go-vod');
+        \OCA\Memories\Util::pkill('go-transcode');
+        \OCA\Memories\Util::pkill('go-vod');
     }
 }

lib/Util.php

@@ -141,4 +141,20 @@ class Util
 
         return false;
     }
+
+    /**
+     * Kill all instances of a process by name.
+     * Similar to pkill, which may not be available on all systems.
+     */
+    public static function pkill(string $name): void
+    {
+        // get pids using ps as array
+        $pids = shell_exec("ps -ef | grep $name | grep -v grep | awk '{print $2}'");
+        $pids = array_filter(explode("\n", $pids));
+
+        // kill all pids
+        foreach ($pids as $pid) {
+            posix_kill((int) $pid, SIGKILL);
+        }
+    }
 }