From 72ef8d00bcb7cbdc0eb77b39c6bdc521d0bd3010 Mon Sep 17 00:00:00 2001
From: emma <emma@tebibyte.media>
Date: Sat, 10 Aug 2024 15:22:07 -0600
Subject: [PATCH] npc(1): adds pledge(2) support

---
 src/npc.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/npc.c b/src/npc.c
index 7ef760a..ca16171 100644
--- a/src/npc.c
+++ b/src/npc.c
@@ -19,8 +19,13 @@
 
 #include <stdio.h> /* fprintf(3), fputs(3), getc(3), perror(3), putc(3), stdin,
                     * stdout, EOF */
-#include <sysexits.h> /* EX_IOERR, EX_OK, EX_USAGE */
-#include <unistd.h> /* getopt(3) */
+#include <sysexits.h> /* EX_IOERR, EX_OK, EX_OSERR, EX_USAGE */
+#include <unistd.h> /* pledge(2), getopt(3) */
+
+#ifdef __OpenBSD__
+#	include <errno.h> /* errno */
+#	include <string.h> /* strerror(3) */
+#endif
 
 char *program_name = "npc";
 
@@ -39,13 +44,22 @@ usage(char *argv0) {
 }
 
 int main(int argc, char *argv[]) {
+#ifdef __OpenBSD__
+	program_name = argv[0] == NULL ? program_name : argv[0];
+
+	if (pledge("stdio", NULL) == -1) {
+		(void)fprintf(stderr, "%s: %s\n", program_name, strerror(errno));
+		return EX_OSERR;
+	}
+#endif
 	int c;
 	char showend = 0; /* print a dollar sign before each newline */
 	char showtab = 0; /* prints tab characters in caret notation */
 
 	if (argc > 0) {
+#ifndef __OpenBSD__
 		program_name = argv[0];
-
+#endif
 		while ((c = getopt(argc, argv, "et")) != -1) {
 			switch (c){
 				case 'e': showend = 1; break;