false(1): fixes pledge(2) invocation

src/false.c

@@ -8,13 +8,12 @@
  */
 
 #ifdef __OpenBSD__
-#	include <unistd.h> /* NULL, pledge(2), unveil(2) */
+#	include <unistd.h> /* pledge(2) */
 #endif
 
 int main(void) {
 #ifdef __OpenBSD__
-	(void)pledge(NULL, NULL);
-	(void)unveil(NULL, NULL);
+	(void)pledge("stdio", "");
 #endif
 	return 1;
 }

src/npc.c

@@ -44,7 +44,7 @@ int main(int argc, char *argv[]) {
 	char showtab = 0; /* prints tab characters in caret notation */
 
 #ifdef __OpenBSD__
-	if (pledge("stdio unveil", NULL) == -1 || unveil(NULL, NULL)) {
+	if (pledge("stdio unveil", "") == -1 || unveil(NULL, NULL)) {
 		perror(argv[0] == NULL ? program_name : argv[0]);
 		return EX_OSERR;
 	}

src/scrut.c

@@ -46,7 +46,7 @@ int main(int argc, char *argv[]) {
 	program_name = argv[0] == NULL ? program_name : argv[0];
 
 #ifdef __OpenBSD__
-	if (pledge("rpath stdio unveil", NULL) == -1) {
+	if (pledge("rpath stdio unveil", "") == -1) {
 		perror(program_name);
 		return EX_OSERR;
 	}

src/str.c

@@ -62,7 +62,7 @@ int main(int argc, char *argv[]) {
 	program_name = argv[0] == NULL ? program_name : argv[0];
 
 #ifdef __OpenBSD__
-	if (pledge("stdio unveil", NULL) == -1 || unveil(NULL, NULL) == -1) {
+	if (pledge("stdio unveil", "") == -1 || unveil(NULL, NULL) == -1) {
 		perror(program_name);
 		return EX_OSERR;
 	}

src/strcmp.c

@@ -29,7 +29,7 @@ int main(int argc, char *argv[]) {
 	unsigned int i;
 
 #ifdef __OpenBSD__
-	if (pledge("stdio unveil", NULL) == -1 || unveil(NULL, NULL) == -1) {
+	if (pledge("stdio unveil", "") == -1 || unveil(NULL, NULL) == -1) {
 		perror(argv[0] == NULL ? program_name : argv[0]);
 
 		return EX_OSERR;

src/true.c

@@ -8,12 +8,11 @@
  */
 
 #ifdef __OpenBSD__
-#	include <unistd.h> /* NULL, pledge(2), unveil(2) */
+#	include <unistd.h> /* pledge(2) */
 #endif
 
 int main(void) {
 #ifdef __OpenBSD__
-	(void)pledge(NULL, NULL);
-	(void)unveil(NULL, NULL);
+	(void)pledge("stdio", "");
 #endif
 }