diff options
Diffstat (limited to 'stdlib')
| -rw-r--r-- | stdlib/putenv.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/stdlib/putenv.c b/stdlib/putenv.c index 4e86934..d97eb54 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); |