Minor improvement of get_prog_name().

1 files changed, 3 insertions, 3 deletions

diff --git a/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
index 5889a62b5..57c6e6819 100644
--- a/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
@@ -979,19 +979,19 @@ static Fl_Window *calc_transient_parent(int &center_x, int &center_y) {
 }
 
 
-static char *get_prog_name() {
+static const char *get_prog_name() {
   pid_t pid = getpid();
   char fname[100];
   sprintf(fname, "/proc/%u/cmdline", pid);
   FILE *in = fopen(fname, "r");
   if (in) {
     static char line[200];
-    char *p = fgets(line, sizeof(line), in);
+    const char *p = fgets(line, sizeof(line), in);
     fclose(in);
     p = strrchr(line, '/'); if (!p) p = line; else p++;
     return p;
   }
-  return NULL;
+  return "unknown";
 }