--- grepcidr.c.orig	Tue Jan 24 18:23:44 2023
+++ grepcidr.c	Tue Jan 24 18:25:23 2023
@@ -1,6 +1,6 @@
 /*
 
-  grepcidr 3.0 - Filter IP addresses matching IPv4 and IPv6 CIDR specification
+  grepcidr3 3.0 - Filter IP addresses matching IPv4 and IPv6 CIDR specification
   Parts copyright (C) 2004, 2005  Jem E. Berkes <jberkes@pc-tools.net>
   	www.sysdesign.ca
   Somewhat rewritten by John Levine <johnl@standcore.com>
@@ -12,6 +12,8 @@
 #include <string.h>
 #include <getopt.h>
 #include <ctype.h>
+#include <unistd.h>
+#include <err.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/mman.h>
@@ -21,10 +23,10 @@
 #define EXIT_NOMATCH	1
 #define EXIT_ERROR	2
 
-#define TXT_VERSION	"grepcidr 3.0\nParts copyright (C) 2004, 2005  Jem E. Berkes <jberkes@pc-tools.net>\n"
+#define TXT_VERSION	"grepcidr3 3.0\nParts copyright (C) 2004, 2005  Jem E. Berkes <jberkes@pc-tools.net>\n"
 #define TXT_USAGE	"Usage:\n" \
-			"\tgrepcidr [-V] [-cCDvhais] PATTERN [FILE...]\n" \
-			"\tgrepcidr [-V] [-cCDvhais] [-e PATTERN | -f FILE] [FILE...]\n"
+			"\tgrepcidr3 [-V] [-cCDvhais] PATTERN [FILE...]\n" \
+			"\tgrepcidr3 [-V] [-cCDvhais] [-e PATTERN | -f FILE] [FILE...]\n"
 #define MAXFIELD	512
 #define TOKEN_SEPS	"\t,\r\n"	/* so user can specify multiple patterns on command line */
 #define INIT_NETWORKS	8192
@@ -608,6 +610,9 @@
 	char* pat_filename = NULL;		/* filename containing patterns */
 	char* pat_strings = NULL;		/* pattern strings on command line */
 	int foundopt;
+
+	if (pledge("stdio rpath", NULL) == -1)
+		err(1, "pledge");
 
 	if (argc == 1)
 	{