diff --git a/docs/pg.1 b/docs/pg.1
index e0f1f99..53aced0 100644
--- a/docs/pg.1
+++ b/docs/pg.1
@@ -1,4 +1,9 @@
-.TH P 1
+.\" Copyright (c) 2024 DTB <trinity@trinity.moe>
+.\"
+.\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
+.\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
+
+.TH PG 1
 
 .SH NAME
 
diff --git a/src/pg.c b/src/pg.c
index 5cb02a1..5130450 100644
--- a/src/pg.c
+++ b/src/pg.c
@@ -1,8 +1,28 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+/*
+ * Copyright (c) 2024 DTB <trinity@trinity.moe>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see https://www.gnu.org/licenses/.
+ */
 
-#if !defined EX_USAGE || !defined EX_SOFTWARE
+#include <stdio.h> /* fclose(3), feof(3), fgetc(3), fgets(3), fopen(3),
+                    * fprintf(3), fputc(3), stderr, stdin, stdout, EOF, FILE,
+                    * NULL */
+#include <stdlib.h> /* size_t */
+#include <string.h> /* strchr */
+
+#if !defined EX_OK || !defined EX_SOFTWARE || !defined EX_USAGE 
 #	include <sysexits.h>
 #endif
 
@@ -14,13 +34,13 @@
 
 static size_t l = 22; /* plan9 default */
 
-static char *program_name = "p";
+static char *program_name = "pg";
 
 static int print_lines(FILE *f, size_t l){
 	int c;
 
-	while((c = getc(f)) != EOF)
-		if((c = putc(c, stdout)) == EOF || (l -= (c == '\n')) == 0)
+	while((c = fgetc(f)) != EOF)
+		if((c = fputc(c, stdout)) == EOF || (l -= (c == '\n')) == 0)
 			break;
 
 	return c;
@@ -45,12 +65,12 @@ int main(int argc, char *argv[]){
 	}
 
 	while(print_lines(stdin, l) != EOF){
-		fgets(cmd, (sizeof cmd) / (sizeof *cmd), t);
-		for(p = cmd; *p != '\0' && strchr(" \t", *p) != NULL; ++p);
+		fgets((char *)cmd, (sizeof cmd) / (sizeof *cmd), t);
+		for(p = (char *)cmd; *p != '\0' && strchr(" \t", *p) != NULL; ++p);
 		if(feof(t) || (*p | 32) == 'q')
 			break;
 	}
 
 exit:	fclose(t);
-	return 0;
+	return EX_OK;
 }