1 /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
18 #if defined _AIX && !defined __GNUC__
26 #if _LIBC || HAVE_STDLIB_H
29 #if _LIBC || HAVE_STRING_H
33 #if !__GNU_LIBRARY__ && !HAVE_STRCHR
42 # define alloca __builtin_alloca
44 extern char *alloca ();
45 # endif /* __GNUC__ */
46 # endif /* HAVE_ALLOCA_H */
50 /* Put STRING, which is of the form "NAME=VALUE", in the environment. */
54 const char *const name_end
= strchr (string
, '=');
60 int use_malloc
= !__libc_use_alloca (name_end
- string
+ 1);
61 if (__builtin_expect (use_malloc
, 0))
63 name
= __strndup (string
, name_end
- string
);
68 name
= strndupa (string
, name_end
- string
);
71 name
= malloc (name_end
- string
+ 1);
74 memcpy (name
, string
, name_end
- string
);
75 name
[name_end
- string
] = '\0';
77 int result
= __add_to_environ (name
, NULL
, string
, 1);
79 if (__glibc_unlikely (use_malloc
))