diff options
Diffstat (limited to 'm4/secure_getenv.m4')
| -rw-r--r-- | m4/secure_getenv.m4 | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/m4/secure_getenv.m4 b/m4/secure_getenv.m4 new file mode 100644 index 0000000..4e1dcdb --- /dev/null +++ b/m4/secure_getenv.m4 @@ -0,0 +1,26 @@ +# Look up an environment variable more securely. +dnl Copyright 2013-2022 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_FUNC_SECURE_GETENV], +[ + dnl Persuade glibc <stdlib.h> to declare secure_getenv(). + AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) + + AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) + AC_CHECK_FUNCS_ONCE([secure_getenv]) + if test $ac_cv_func_secure_getenv = no; then + HAVE_SECURE_GETENV=0 + fi +]) + +# Prerequisites of lib/secure_getenv.c. +AC_DEFUN([gl_PREREQ_SECURE_GETENV], [ + AC_CHECK_FUNCS([__secure_getenv]) + if test $ac_cv_func___secure_getenv = no; then + AC_CHECK_FUNCS([issetugid]) + fi + AC_CHECK_FUNCS_ONCE([getuid geteuid getgid getegid]) +]) |