diff -rN -u old-ucspi-unix-1.0/unixclient.c new-ucspi-unix-1.0/unixclient.c
--- old-ucspi-unix-1.0/unixclient.c	2020-10-10 20:09:42.852096610 +0200
+++ new-ucspi-unix-1.0/unixclient.c	2020-10-10 20:09:42.852096610 +0200
@@ -13,10 +13,14 @@
 static const char* argv0;
 static const char* opt_socket;
 static char** command_argv;
+static unsigned opt_quiet = 0;
+static unsigned opt_verbose = 0;
 
 void die(const char* msg)
 {
-  perror(msg);
+  if(!opt_quiet) {
+    perror(msg);
+  }
   exit(1);
 }
 
@@ -44,20 +48,27 @@
 {
   if(message)
     fprintf(stderr, "%s: %s\n", argv0, message);
-  fprintf(stderr, "usage: %s [options] socket program\n"
-	  "  -q           Quiet. Do not print any messages.\n"
-	  "  -Q (default) Print error messages.\n"
-	  "  -v           Verbose.  Print error and status messages.\n"
-	  "  -c N         Do not handle more than N simultaneous connections.\n"
-	  "               (default 10)\n", argv0);
+  fprintf(stderr,
+    "usage: %s [options] socket program\n"
+    "  -q           Quiet. Do not print any messages.\n"
+    "  -Q (default) Print error messages.\n"
+    "  -v           Verbose.  Print error and status messages.\n", argv0);
   exit(1);
 }
 
 void parse_options(int argc, char* argv[])
 {
+  int opt;
   argv0 = argv[0];
-  ++argv;
-  --argc;
+  while((opt = getopt(argc, argv, "qQv")) != EOF) {
+    switch(opt) {
+    case 'q': opt_quiet = 1; opt_verbose = 0; break;
+    case 'Q': opt_quiet = 0; break;
+    case 'v': opt_quiet = 0; opt_verbose = 1; break;
+    }
+  }
+  argc -= optind;
+  argv += optind;
   if(argc < 2)
     usage(0);
   opt_socket = argv[0];
patch be48e9b5484a0ea65ec4fc2011a340e6f65cbb56
Author: Ben Franksen <ben.franksen@online.de>
Date:   Sat Oct 10 19:04:53 CEST 2020
  * unixclient: actually handle the standard -q, -Q, and -v options