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From: dlong@sdsu.UUCP
Newsgroups: comp.os.minix
Subject: diff for head.c
Message-ID: <2549@sdsu.UUCP>
Date: Mon, 2-Mar-87 01:48:33 EST
Article-I.D.: sdsu.2549
Posted: Mon Mar  2 01:48:33 1987
Date-Received: Wed, 4-Mar-87 19:18:47 EST
Reply-To: dlong@sdsu.UUCP (Dean Long)
Distribution: world
Organization: University of California, San Diego
Lines: 37

Keywords:

The following is a diff for commands/head.c to hopefully fix a bug
that allows the buffer to overflow at EOF or lines longer than 256
characters.
----------------------------------------------------------------------

1a2
> /* Minor changes by: Dean Long 2/24/87 */
5a7
> #define LINE    256
8c10
< char lbuf[256];
---
> char lbuf[LINE];
58c60,61
<   while (n--) do_line();
---
>   /* Stop at EOF. -dl 2/24/87 */
>   while (n-- && do_line()) continue;
66c69,71
<   char c, *cp;
---
>   int c;
>   char *cp;
> 
68c73,76
<   while ( (c = getc(stdin)) != '\n') *cp++ = c;
---
> /* Stop at EOF or buffer full. -dl 2/24/87 */
>   while ((c = getc(stdin)) != '\n' && c != EOF && cp < lbuf + LINE - 2)
>     *cp++ = (char)c;
>   if (c == EOF) return 0;
71a80
>   return 1;
-- 
Dean Long
University of California, San Diego
sdcsvax!tiamat!dlong