1 # Look up an environment variable more securely.
2 dnl Copyright 2013-2018 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_SECURE_GETENV],
9 dnl Persuade glibc <stdlib.h> to declare secure_getenv().
10 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
12 AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
13 AC_CHECK_FUNCS_ONCE([secure_getenv])
14 if test $ac_cv_func_secure_getenv = no; then
19 # Prerequisites of lib/secure_getenv.c.
20 AC_DEFUN([gl_PREREQ_SECURE_GETENV], [
21 AC_CHECK_FUNCS([__secure_getenv])
22 if test $ac_cv_func___secure_getenv = no; then
23 AC_CHECK_FUNCS([issetugid])
25 AC_CHECK_FUNCS_ONCE([getuid geteuid getgid getegid])