| 1 | # Look up an environment variable more securely. |
| 2 | dnl Copyright 2013-2016 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. |
| 6 | |
| 7 | AC_DEFUN([gl_FUNC_SECURE_GETENV], |
| 8 | [ |
| 9 | dnl Persuade glibc <stdlib.h> to declare secure_getenv(). |
| 10 | AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) |
| 11 | |
| 12 | AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) |
| 13 | AC_CHECK_FUNCS_ONCE([secure_getenv]) |
| 14 | if test $ac_cv_func_secure_getenv = no; then |
| 15 | HAVE_SECURE_GETENV=0 |
| 16 | fi |
| 17 | ]) |
| 18 | |
| 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]) |
| 24 | fi |
| 25 | AC_CHECK_FUNCS_ONCE([getuid geteuid getgid getegid]) |
| 26 | ]) |