From owner-svn-src-head@freebsd.org Mon Feb 15 18:14:22 2016 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9C8DCAA95D1; Mon, 15 Feb 2016 18:14:22 +0000 (UTC) (envelope-from pfg@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 54027844; Mon, 15 Feb 2016 18:14:22 +0000 (UTC) (envelope-from pfg@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u1FIELQp067399; Mon, 15 Feb 2016 18:14:21 GMT (envelope-from pfg@FreeBSD.org) Received: (from pfg@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u1FIEL7w067397; Mon, 15 Feb 2016 18:14:21 GMT (envelope-from pfg@FreeBSD.org) Message-Id: <201602151814.u1FIEL7w067397@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: pfg set sender to pfg@FreeBSD.org using -f From: "Pedro F. Giffuni" Date: Mon, 15 Feb 2016 18:14:21 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r295632 - head/lib/libc/stdio X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Feb 2016 18:14:22 -0000 Author: pfg Date: Mon Feb 15 18:14:21 2016 New Revision: 295632 URL: https://svnweb.freebsd.org/changeset/base/295632 Log: getln: We cannot expand the buffer beyond INT_MAX. In such cases return ENOMEM. This is a limitation of our implementation, alternatively you may consider getline(3). Differential Revision: https://reviews.freebsd.org/D442 (Partial) Obtained from: Apple Inc. (Libc 997.90.3) Relnotes: yes Modified: head/lib/libc/stdio/fgetln.3 head/lib/libc/stdio/fgetln.c Modified: head/lib/libc/stdio/fgetln.3 ============================================================================== --- head/lib/libc/stdio/fgetln.3 Mon Feb 15 18:13:33 2016 (r295631) +++ head/lib/libc/stdio/fgetln.3 Mon Feb 15 18:14:21 2016 (r295632) @@ -28,7 +28,7 @@ .\" @(#)fgetln.3 8.3 (Berkeley) 4/19/94 .\" $FreeBSD$ .\" -.Dd April 19, 1994 +.Dd February 15, 2016 .Dt FGETLN 3 .Os .Sh NAME @@ -97,6 +97,9 @@ These changes are lost as soon as the po The argument .Fa stream is not a stream open for reading. +.It Bq Er ENOMEM +The internal line buffer could not be expanded due to lack of available memory, +or because it would need to expand beyond INT_MAX in size. .El .Pp The Modified: head/lib/libc/stdio/fgetln.c ============================================================================== --- head/lib/libc/stdio/fgetln.c Mon Feb 15 18:13:33 2016 (r295631) +++ head/lib/libc/stdio/fgetln.c Mon Feb 15 18:14:21 2016 (r295632) @@ -37,6 +37,8 @@ static char sccsid[] = "@(#)fgetln.c 8.2 __FBSDID("$FreeBSD$"); #include "namespace.h" +#include +#include #include #include #include @@ -61,6 +63,10 @@ __slbexpand(FILE *fp, size_t newsize) #endif if (fp->_lb._size >= newsize) return (0); + if (newsize > INT_MAX) { + errno = ENOMEM; + return (-1); + } if ((p = realloc(fp->_lb._base, newsize)) == NULL) return (-1); fp->_lb._base = p; @@ -152,13 +158,14 @@ fgetln(FILE *fp, size_t *lenp) } *lenp = len; #ifdef notdef - fp->_lb._base[len] = 0; + fp->_lb._base[len] = '\0'; #endif FUNLOCKFILE(fp); return ((char *)fp->_lb._base); error: *lenp = 0; /* ??? */ + fp->_flags |= __SERR; FUNLOCKFILE(fp); return (NULL); /* ??? */ }