From 1863a89ae9d52847142b4a205899bd53f97d0fef Mon Sep 17 00:00:00 2001
From: millert <millert@openbsd.org>
Date: Wed, 22 Jan 1997 06:43:51 +0000
Subject: [PATCH] Fix off-by-one differently--add an extra byte to buffer
 (ick). Don't dump core on empty file.

---
 usr.bin/sort/files.c |  6 +++---
 usr.bin/sort/fsort.c |  8 ++++----
 usr.bin/sort/msort.c | 37 ++++++++++++++++++++-----------------
 3 files changed, 27 insertions(+), 24 deletions(-)

diff --git a/usr.bin/sort/files.c b/usr.bin/sort/files.c
index f345877e48e..a11a882ccae 100644
--- a/usr.bin/sort/files.c
+++ b/usr.bin/sort/files.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: files.c,v 1.1 1997/01/20 19:39:50 millert Exp $	*/
+/*	$OpenBSD: files.c,v 1.2 1997/01/22 06:43:51 millert Exp $	*/
 
 /*-
  * Copyright (c) 1993
@@ -40,7 +40,7 @@
 #if 0
 static char sccsid[] = "@(#)files.c	8.1 (Berkeley) 6/6/93";
 #else
-static char rcsid[] = "$OpenBSD: files.c,v 1.1 1997/01/20 19:39:50 millert Exp $";
+static char rcsid[] = "$OpenBSD: files.c,v 1.2 1997/01/22 06:43:51 millert Exp $";
 #endif
 #endif /* not lint */
 
@@ -184,7 +184,7 @@ makeline(flno, filelist, nfiles, buffer, bufend, dummy2)
 			if(flno >= 0) fstack[flno].fp = 0;
 		} else {
 			buffer->data[100] = '\000';
-			warnx("line too long:ignoring %s...", buffer->data);
+			warnx("line too long: ignoring %s...", buffer->data);
 		}
 	}
 }
diff --git a/usr.bin/sort/fsort.c b/usr.bin/sort/fsort.c
index 122608ae646..3537dfb9f5e 100644
--- a/usr.bin/sort/fsort.c
+++ b/usr.bin/sort/fsort.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fsort.c,v 1.2 1997/01/22 05:49:19 millert Exp $	*/
+/*	$OpenBSD: fsort.c,v 1.3 1997/01/22 06:43:52 millert Exp $	*/
 
 /*-
  * Copyright (c) 1993
@@ -40,7 +40,7 @@
 #if 0
 static char sccsid[] = "@(#)fsort.c	8.1 (Berkeley) 6/6/93";
 #else
-static char rcsid[] = "$OpenBSD: fsort.c,v 1.2 1997/01/22 05:49:19 millert Exp $";
+static char rcsid[] = "$OpenBSD: fsort.c,v 1.3 1997/01/22 06:43:52 millert Exp $";
 #endif
 #endif /* not lint */
 
@@ -92,12 +92,12 @@ fsort(binno, depth, infiles, nfiles, outfp, ftbl)
 	tfield[0].icol.num = 1;
 	weights = ftbl[0].weights;
 	if (!buffer) {
-		buffer = malloc(BUFSIZE);
+		buffer = malloc(BUFSIZE + 1);
 		keylist = malloc(MAXNUM * sizeof(u_char *));
 		if (!SINGL_FLD)
 			linebuf = malloc(MAXLLEN);
 	}
-	bufend = buffer + BUFSIZE - 1;
+	bufend = buffer + BUFSIZE;
 	if (binno >= 0) {
 		tfiles.top = infiles.top + nfiles;
 		get = getnext;
diff --git a/usr.bin/sort/msort.c b/usr.bin/sort/msort.c
index 09081480e67..5e2fc6556d6 100644
--- a/usr.bin/sort/msort.c
+++ b/usr.bin/sort/msort.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: msort.c,v 1.1 1997/01/20 19:39:53 millert Exp $	*/
+/*	$OpenBSD: msort.c,v 1.2 1997/01/22 06:43:53 millert Exp $	*/
 
 /*-
  * Copyright (c) 1993
@@ -40,7 +40,7 @@
 #if 0
 static char sccsid[] = "@(#)msort.c	8.1 (Berkeley) 6/6/93";
 #else
-static char rcsid[] = "$OpenBSD: msort.c,v 1.1 1997/01/20 19:39:53 millert Exp $";
+static char rcsid[] = "$OpenBSD: msort.c,v 1.2 1997/01/22 06:43:53 millert Exp $";
 #endif
 #endif /* not lint */
 
@@ -151,6 +151,7 @@ merge(infl0, nfiles, get, outfp, put, ftbl)
 	int c, i, j;
 	union f_handle dummy = {0};
 	struct mfile *flist[16], *cfile;
+
 	for (i = j = 0; i < nfiles; i++) {
 		cfile = (MFILE *) (buffer +
 		    i * LALIGN(MAXLLEN + sizeof(TMFILE)));
@@ -170,22 +171,24 @@ merge(infl0, nfiles, get, outfp, put, ftbl)
 		}
 		j++;
 	}
-	cfile = cfilebuf;
-	cfile->flno = flist[0]->flno;
-	cfile->end = cfile->rec->data + MAXLLEN;
-	while (nfiles) {
-		for (c = 1; c == 1;) {
-			if (EOF == (c = get(cfile->flno, dummy, nfiles,
-			   cfile->rec, cfile->end, ftbl))) {
-				put(flist[0]->rec, outfp);
-				memmove(flist, flist + 1,
-				    sizeof(MFILE *) * (--nfiles));
-				cfile->flno = flist[0]->flno;
-				break;
+	if (nfiles > 0) {
+		cfile = cfilebuf;
+		cfile->flno = flist[0]->flno;
+		cfile->end = cfile->rec->data + MAXLLEN;
+		while (nfiles) {
+			for (c = 1; c == 1;) {
+				if (EOF == (c = get(cfile->flno, dummy, nfiles,
+				   cfile->rec, cfile->end, ftbl))) {
+					put(flist[0]->rec, outfp);
+					memmove(flist, flist + 1,
+					    sizeof(MFILE *) * (--nfiles));
+					cfile->flno = flist[0]->flno;
+					break;
+				}
+				if (!(c = insert(flist, &cfile, nfiles, DELETE)))
+					put(cfile->rec, outfp);
 			}
-			if (!(c = insert(flist, &cfile, nfiles, DELETE)))
-				put(cfile->rec, outfp);
-		}
+		}	
 	}	
 }
 
-- 
2.20.1