From 5a81dcea78a779824179c7e626261a4903241139 Mon Sep 17 00:00:00 2001
From: millert <millert@openbsd.org>
Date: Wed, 18 Jul 2018 17:20:54 +0000
Subject: [PATCH] Convert from fgetln(3) to getline(3).  Based on a diff from
 Lauri Tirkkonen. With a tweak and OK from schwarze@

---
 usr.bin/join/join.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/usr.bin/join/join.c b/usr.bin/join/join.c
index 3049a423196..d3745f167a0 100644
--- a/usr.bin/join/join.c
+++ b/usr.bin/join/join.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: join.c,v 1.27 2015/10/09 01:37:07 deraadt Exp $	*/
+/* $OpenBSD: join.c,v 1.28 2018/07/18 17:20:54 millert Exp $	*/
 
 /*-
  * Copyright (c) 1991, 1993, 1994
@@ -298,9 +298,10 @@ void
 slurpit(INPUT *F)
 {
 	LINE *lp, *lastlp, tmp;
-	size_t len;
+	ssize_t len;
+	size_t linesize;
 	u_long cnt;
-	char *bp, *fieldp;
+	char *bp, *fieldp, *line;
 	long fpos;
 	/*
 	 * Read all of the lines from an input file that have the same
@@ -308,6 +309,8 @@ slurpit(INPUT *F)
 	 */
 
 	F->setcnt = 0;
+	line = NULL;
+	linesize = 0;
 	for (lastlp = NULL; ; ++F->setcnt, lastlp = lp) {
 		/*
 		 * If we're out of space to hold line structures, allocate
@@ -343,13 +346,17 @@ slurpit(INPUT *F)
 			F->pushbool = 0;
 			continue;
 		}
-		if ((bp = fgetln(F->fp, &len)) == NULL)
-			return;
+		if ((len = getline(&line, &linesize, F->fp)) == -1)
+			break;
 		/*
 		 * we depend on knowing on what field we are, one safe way is
 		 * the file position.
 		*/
 		fpos = ftell(F->fp) - len;
+
+		/* Remove trailing newline, if it exists, and copy line. */
+		if (line[len - 1] == '\n')
+			len--;
 		if (lp->linealloc <= len + 1) {
 			char *p;
 			u_long newsize = lp->linealloc +
@@ -360,17 +367,13 @@ slurpit(INPUT *F)
 			lp->linealloc = newsize;
 		}
 		F->setusedc++;
-		memmove(lp->line, bp, len);
+		memcpy(lp->line, line, len);
+		lp->line[len] = '\0';
 		lp->fpos = fpos;
-		/* Replace trailing newline, if it exists. */
-		if (bp[len - 1] == '\n')
-			lp->line[len - 1] = '\0';
-		else
-			lp->line[len] = '\0';
-		bp = lp->line;
 
 		/* Split the line into fields, allocate space as necessary. */
 		lp->fieldcnt = 0;
+		bp = lp->line;
 		while ((fieldp = strsep(&bp, tabchar)) != NULL) {
 			if (spans && *fieldp == '\0')
 				continue;
@@ -393,6 +396,7 @@ slurpit(INPUT *F)
 			break;
 		}
 	}
+	free(line);
 }
 
 int
-- 
2.20.1