--- tftpd/tftpd.c.orig	2003-01-31 03:22:33.000000000 +0100
+++ tftpd/tftpd.c	2003-04-11 09:19:35.000000000 +0200
@@ -477,6 +477,22 @@
       setsid();
 #endif
 #endif
+#ifdef PID_FILE
+  /* Write PID file */
+  {
+    mode_t old_umask;
+    pid_t  pid;
+    FILE   *fp;
+
+    old_umask = umask((mode_t) 0022);
+    pid = getpid();
+    if ((fp = fopen(PID_FILE, "w")) == NULL)
+      syslog(LOG_ERR, "cannot write PID file '%s'", PID_FILE);
+    fprintf(fp, "%ld\n", (long)pid);
+    fclose(fp);
+    umask(old_umask);
+  }
+#endif
     }
   } else {
     /* 0 is our socket descriptor */