From ea389b12b3b65c4a7fa91fa76f8c99867eb37865 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Mon, 16 May 2011 10:13:54 -0400 Subject: Handle long variable names in putenv --- stdlib/putenv.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) (limited to 'stdlib/putenv.c') diff --git a/stdlib/putenv.c b/stdlib/putenv.c index 4e8693403a..d97eb5423a 100644 --- a/stdlib/putenv.c +++ b/stdlib/putenv.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 94, 95, 96, 97, 98, 99 Free Software Foundation, Inc. +/* Copyright (C) 1991, 94, 95, 96, 97, 98, 99, 11 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -57,14 +57,31 @@ putenv (string) if (name_end != NULL) { + char *name; #ifdef _LIBC - char *name = strndupa (string, name_end - string); + int use_malloc = !__libc_use_alloca (name_end - string + 1); + if (__builtin_expect (use_malloc, 0)) + { + name = strndup (string, name_end - string); + if (name == NULL) + return -1; + } + else + name = strndupa (string, name_end - string); #else - char *name = alloca (name_end - string + 1); +# define use_malloc 1 + name = malloc (name_end - string + 1); + if (name == NULL) + return -1; memcpy (name, string, name_end - string); name[name_end - string] = '\0'; #endif - return __add_to_environ (name, NULL, string, 1); + int result = __add_to_environ (name, NULL, string, 1); + + if (__builtin_expect (use_malloc, 0)) + free (name); + + return result; } __unsetenv (string); -- cgit v1.2.3