| #serial 11 |
| |
| # Copyright (C) 2005-2007, 2009-2016 Free Software Foundation, Inc. |
| # |
| # This file is free software; the Free Software Foundation |
| # gives unlimited permission to copy and/or distribute it, |
| # with or without modifications, as long as this notice is preserved. |
| |
| dnl From Derek Price |
| dnl |
| dnl Provide getlogin_r when the system lacks it. |
| dnl |
| |
| AC_DEFUN([gl_FUNC_GETLOGIN_R], |
| [ |
| AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) |
| |
| dnl Persuade glibc <unistd.h> to declare getlogin_r(). |
| dnl Persuade Solaris <unistd.h> to provide the POSIX compliant declaration of |
| dnl getlogin_r(). |
| AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) |
| |
| AC_CHECK_DECLS_ONCE([getlogin_r]) |
| if test $ac_cv_have_decl_getlogin_r = no; then |
| HAVE_DECL_GETLOGIN_R=0 |
| fi |
| |
| AC_CHECK_FUNCS_ONCE([getlogin_r]) |
| if test $ac_cv_func_getlogin_r = no; then |
| HAVE_GETLOGIN_R=0 |
| else |
| HAVE_GETLOGIN_R=1 |
| dnl On OSF/1 5.1, getlogin_r returns a truncated result if the buffer is |
| dnl not large enough. |
| AC_REQUIRE([AC_CANONICAL_HOST]) |
| AC_CACHE_CHECK([whether getlogin_r works with small buffers], |
| [gl_cv_func_getlogin_r_works], |
| [ |
| dnl Initial guess, used when cross-compiling. |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess no on OSF/1. |
| osf*) gl_cv_func_getlogin_r_works="guessing no" ;; |
| # Guess yes otherwise. |
| *) gl_cv_func_getlogin_r_works="guessing yes" ;; |
| esac |
| changequote([,])dnl |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stddef.h> |
| #include <unistd.h> |
| #if !HAVE_DECL_GETLOGIN_R |
| extern |
| # ifdef __cplusplus |
| "C" |
| # endif |
| int getlogin_r (char *, size_t); |
| #endif |
| int |
| main (void) |
| { |
| int result = 0; |
| char buf[100]; |
| |
| if (getlogin_r (buf, 0) == 0) |
| result |= 16; |
| if (getlogin_r (buf, 1) == 0) |
| result |= 17; |
| return result; |
| }]])], |
| [gl_cv_func_getlogin_r_works=yes], |
| [case $? in |
| 16 | 17) gl_cv_func_getlogin_r_works=no ;; |
| esac |
| ], |
| [:]) |
| ]) |
| case "$gl_cv_func_getlogin_r_works" in |
| *yes) ;; |
| *) REPLACE_GETLOGIN_R=1 ;; |
| esac |
| fi |
| ]) |
| |
| AC_DEFUN([gl_PREREQ_GETLOGIN_R], |
| [ |
| AC_CHECK_DECLS_ONCE([getlogin]) |
| ]) |
