r18505: add configure checks for telldir() and seekdir()

telldir() is different on older OpenBSD versions
seekdir() is different Tru64

tridge: OpenBSD seems to like this replacement:-)
        while MAC OS 10 gets 134 runtime error:-(
	lets wait what Tru64 will give

metze
(This used to be commit 1f4e602ff239b7feabb2dd1d6938dedf91bde5cd)

3 files changed, 47 insertions, 4 deletions

diff --git a/source4/lib/replace/libreplace_macros.m4 b/source4/lib/replace/libreplace_macros.m4
index 41ec03f07a..91f816c75d 100644
--- a/source4/lib/replace/libreplace_macros.m4
+++ b/source4/lib/replace/libreplace_macros.m4
@@ -268,3 +268,23 @@ dnl AS_HELP_STRING is not available in autoconf 2.57, and AC_HELP_STRING is depr
 dnl in autoconf 2.59, so define AS_HELP_STRING to be AC_HELP_STRING unless it is already
 dnl defined.
 m4_ifdef([AS_HELP_STRING], , [m4_define([AS_HELP_STRING], m4_defn([AC_HELP_STRING]))])
+
+dnl check if the prototype in the header matches the given one
+dnl AC_VERIFY_C_PROTOTYPE(prototype,functionbody,[IF-TRUE].[IF-FALSE],[extraheaders])
+AC_DEFUN(AC_VERIFY_C_PROTOTYPE,
+[AC_CACHE_CHECK([for prototype $1], AS_TR_SH([ac_cv_c_prototype_$1]),
+	AC_COMPILE_IFELSE([
+		AC_INCLUDES_DEFAULT
+		$5
+		$1
+		{
+			$2
+		}
+	],[
+		AS_TR_SH([ac_cv_c_prototype_$1])=yes
+		$3
+	],[
+		AS_TR_SH([ac_cv_c_prototype_$1])=no
+		$4
+	])
+)])
diff --git a/source4/lib/replace/repdir.m4 b/source4/lib/replace/repdir.m4
index 06a01964a8..93bf4ec911 100644
--- a/source4/lib/replace/repdir.m4
+++ b/source4/lib/replace/repdir.m4
@@ -14,7 +14,7 @@ if test x"$libreplace_READDIR_NEEDED" = x"yes"; then
 AC_CHECK_FUNCS(getdents)
 AC_CACHE_CHECK([for replacing readdir using getdents()],libreplace_READDIR_GETDENTS,[
 	AC_TRY_RUN([
-#include "confdefs.h"
+#define _LIBREPLACE_REPLACE_H
 #include "$libreplacedir/repdir_getdents.c"
 #define test_readdir_os2_delete main
 #include "$libreplacedir/test/os2_delete.c"],
@@ -34,9 +34,26 @@ fi
 #
 if test x"$libreplace_READDIR_NEEDED" = x"yes"; then
 AC_CHECK_FUNCS(getdirentries)
+AC_VERIFY_C_PROTOTYPE([long telldir(const DIR *dir)],
+	[
+	return 0;
+	],[
+	AC_DEFINE(TELLDIR_TAKES_CONST_DIR, 1, [Whether telldir takes a const pointer])
+	],[],[
+	#include <dirent.h>
+	])
+
+AC_VERIFY_C_PROTOTYPE([int seekdir(DIR *dir, long ofs)],
+	[
+	return 0;
+	],[
+	AC_DEFINE(SEEKDIR_RETURNS_INT, 1, [Whether seekdir returns an int])
+	],[],[
+	#include <dirent.h>
+	])
 AC_CACHE_CHECK([for replacing readdir using getdirentries()],libreplace_READDIR_GETDIRENTRIES,[
 	AC_TRY_RUN([
-#include "confdefs.h"
+#define _LIBREPLACE_REPLACE_H
 #include "$libreplacedir/repdir_getdirentries.c"
 #define test_readdir_os2_delete main
 #include "$libreplacedir/test/os2_delete.c"],
diff --git a/source4/lib/replace/repdir_getdirentries.c b/source4/lib/replace/repdir_getdirentries.c
index a9c1c1ce82..9e4b63145c 100644
--- a/source4/lib/replace/repdir_getdirentries.c
+++ b/source4/lib/replace/repdir_getdirentries.c
@@ -48,6 +48,7 @@
   well. Contact the author.
 */
 
+#include "replace.h"
 #include <stdlib.h>
 #include <sys/stat.h>
 #include <unistd.h>
@@ -104,8 +105,6 @@ struct dirent *readdir(DIR *dir)
 	return de;
 }
 
-#define TELLDIR_TAKES_CONST_DIR
-
 #ifdef TELLDIR_TAKES_CONST_DIR
 long telldir(const DIR *dir)
 #else
@@ -126,7 +125,11 @@ long telldir(DIR *dir)
 	return d->seekpos + d->ofs;
 }
 
+#ifdef SEEKDIR_RETURNS_INT
+int seekdir(DIR *dir, long ofs)
+#else
 void seekdir(DIR *dir, long ofs)
+#endif
 {
 	struct dir_buf *d = (struct dir_buf *)dir;
 	long pos;
@@ -136,6 +139,9 @@ void seekdir(DIR *dir, long ofs)
 	while (d->ofs < (ofs & (DIR_BUF_SIZE-1))) {
 		if (readdir(dir) == NULL) break;
 	}
+#ifdef SEEKDIR_RETURNS_INT
+	return -1;
+#endif
 }
 
 void rewinddir(DIR *dir)