Game detection: foreign GPU holders take an external lock hold (GAME_PROCS, GPU_FOREIGN_VRAM_MB)

internal/game/procs_linux.go

@@ -0,0 +1,30 @@
+//go:build linux
+
+package game
+
+import (
+	"os"
+	"strconv"
+	"strings"
+)
+
+// processes lists the running processes from /proc/<pid>/comm.
+func processes() ([]Process, error) {
+	entries, err := os.ReadDir("/proc")
+	if err != nil {
+		return nil, err
+	}
+	var ps []Process
+	for _, e := range entries {
+		pid, err := strconv.Atoi(e.Name())
+		if err != nil {
+			continue
+		}
+		comm, err := os.ReadFile("/proc/" + e.Name() + "/comm")
+		if err != nil {
+			continue // process vanished mid-walk
+		}
+		ps = append(ps, Process{PID: pid, Name: strings.TrimSpace(string(comm))})
+	}
+	return ps, nil
+}