1 /* Environment handling for dynamic loader.
2 Copyright (C) 1995-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
24 /* Walk through the environment of the process and return all entries
25 starting with `LD_'. */
27 _dl_next_ld_env_entry (char ***position
)
29 char **current
= *position
;
32 while (*current
!= NULL
)
34 if (__builtin_expect ((*current
)[0] == 'L', 0)
35 && (*current
)[1] == 'D' && (*current
)[2] == '_')
37 result
= &(*current
)[3];
39 /* Save current position for next visit. */
40 *position
= ++current
;
52 /* In ld.so __environ is not exported. */
53 extern char **__environ attribute_hidden
;
56 unsetenv (const char *name
)
65 while ((*ep
)[cnt
] == name
[cnt
] && name
[cnt
] != '\0')
68 if (name
[cnt
] == '\0' && (*ep
)[cnt
] == '=')
70 /* Found it. Remove this pointer by moving later ones to
77 /* Continue the loop in case NAME appears again. */