maint: update copyright

[gnulib.git] / m4 / getlogin_r.m4

diff --git a/m4/getlogin_r.m4 b/m4/getlogin_r.m4
index 236872c..d9fa1ca 100644 (file)
--- a/m4/getlogin_r.m4
+++ b/m4/getlogin_r.m4
@@ -1,6 +1,6 @@
-#serial 6
+#serial 11
 
-# Copyright (C) 2005-2007, 2009-2010 Free Software Foundation, Inc.
+# Copyright (C) 2005-2007, 2009-2014 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -16,16 +16,69 @@ 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
-    AC_LIBOBJ([getlogin_r])
-    gl_PREREQ_GETLOGIN_R
-    AC_CHECK_DECLS_ONCE([getlogin_r])
-    if test $ac_cv_have_decl_getlogin_r = no; then
-      HAVE_DECL_GETLOGIN_R=0
-    fi
+    HAVE_GETLOGIN_R=0
+  else
+    HAVE_GETLOGIN_R=1
+    dnl On OSF/1 5.1, getlogin_r returns a truncated result if the buffer is
+    dnl not large enough.
+    AC_REQUIRE([AC_CANONICAL_HOST])
+    AC_CACHE_CHECK([whether getlogin_r works with small buffers],
+      [gl_cv_func_getlogin_r_works],
+      [
+        dnl Initial guess, used when cross-compiling.
+changequote(,)dnl
+        case "$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
 ])