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 <errno.h> +#include <limits.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -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); /* ??? */ } _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
