From 11add79cb131e2ace75337c84c9170035a159aa5 Mon Sep 17 00:00:00 2001
From: Kurt Zeilenga <kurt@openldap.org>
Date: Fri, 26 Mar 1999 17:43:23 +0000
Subject: [PATCH] Update locking codes.

---
 include/ac/unistd.h        | 47 +++++++++++++++++++++++++-------------
 include/lutil_lockf.h      | 16 ++++---------
 libraries/liblutil/lockf.c | 12 ++++------
 3 files changed, 40 insertions(+), 35 deletions(-)

diff --git a/include/ac/unistd.h b/include/ac/unistd.h
index b4baba4fe6..0162d49ca4 100644
--- a/include/ac/unistd.h
+++ b/include/ac/unistd.h
@@ -52,27 +52,42 @@ extern char* getpass LDAP_P((const char *getpass));
 	extern char *mktemp(char *);
 #endif
 
-/* use _POSIX_VERSION for POSIX.1 code */
-
 /* Setup file locking macros */
-#if defined (HAVE_LOCKF) && defined (F_LOCK) && defined (F_ULOCK)
-#	define ldap_lockf(x) lockf(fileno(x),F_LOCK, 0)
-#	define ldap_unlockf(x) lockf(fileno(x),F_ULOCK, 0)
-#elif defined (HAVE_FCNTL_H) && defined (F_WRLCK) && defined (F_UNLCK)
-#	ifndef  NEED_FCNTL_LOCKING
-#		define NEED_FCNTL_LOCKING
+#if !defined( ldap_lockf ) && HAVE_LOCKF && defined( F_LOCK )
+#	define ldap_lockf(x)	lockf(fileno(x), F_LOCK, 0)
+#	define ldap_unlockf(x)	lockf(fileno(x), F_ULOCK, 0)
+#endif
+
+#if !defined( ldap_lockf ) && HAVE_FCNTL
+#	ifdef HAVE_FCNTL_H
+#		include <fcntl.h>
 #	endif
-#	include <lutil_lockf.h>
-#	define ldap_lockf(x) lutil_ldap_lockf(x)
-#	define ldap_unlockf(x) lutil_ldap_unlockf(x)
-#elif defined (HAVE_FLOCK) && defined (LOCK_EX) && defined (LOCK_UN)
+
+#	ifdef F_WRLCK
+#		ifndef  NEED_FCNTL_LOCKING
+#			define NEED_FCNTL_LOCKING
+#		endif
+#		include <lutil_lockf.h>
+#		define ldap_lockf(x)	lutil_lockf(x)
+#		define ldap_unlockf(x)	lutil_unlockf(x)
+#	endif
+#endif
+
+#if !defined( ldap_lockf ) && HAVE_FLOCK
 #	if HAVE_SYS_FILE_H
 #		include <sys/file.h>
 #	endif
-#	define ldap_lockf(x) flock(fileno(x),LOCK_EX)
-#	define ldap_unlockf(x) flock(fileno(x),LOCK_UN)
-#else
-#error no_suitable_locking_found
+#	ifdef LOCK_EX
+#		define ldap_lockf(x)	flock(fileno(x), LOCK_EX)
+#		define ldap_unlockf(x)	flock(fileno(x), LOCK_UN)
+#	endif
+#endif
+
+#if !defined( ldap_lockf )
+	/* use some simplistic locking method */
+#	include <lutil_lockf.h>
+#	define ldap_lockf(x)	lutil_lockf(x)
+#	define ldap_unlockf(x)	lutil_unlockf(x)
 #endif
 
 #endif /* _AC_UNISTD_H */
diff --git a/include/lutil_lockf.h b/include/lutil_lockf.h
index 9a791d8c3a..166cbe1a40 100644
--- a/include/lutil_lockf.h
+++ b/include/lutil_lockf.h
@@ -7,26 +7,18 @@
  * license is available at http://www.OpenLDAP.org/license.html or
  * in file LICENSE in the top-level directory of the distribution.
  */
+
 /* File locking methods */
+/* only available if fcntl() locking is required */
 
 #ifndef _LUTIL_LOCKF_H_
 #define _LUTIL_LOCKF_H_
 
-#include <stdio.h>
-#include <ldap_cdefs.h>
-#include <ac/bytes.h>
-
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-
-#ifdef NEED_FCNTL_LOCKING
 LDAP_BEGIN_DECL
 
-LDAP_F int lutil_ldap_lockf LDAP_P(( FILE *fs ));
-LDAP_F int lutil_ldap_unlockf LDAP_P(( FILE *fs ));
+LDAP_F int lutil_lockf LDAP_P(( FILE *fs ));
+LDAP_F int lutil_unlockf LDAP_P(( FILE *fs ));
 
 LDAP_END_DECL
-#endif /* NEED_FCNTL_LOCKING */
 
 #endif /* _LUTIL_LOCKF_H_ */
diff --git a/libraries/liblutil/lockf.c b/libraries/liblutil/lockf.c
index 7f0d569f81..7307720dd6 100644
--- a/libraries/liblutil/lockf.c
+++ b/libraries/liblutil/lockf.c
@@ -14,28 +14,26 @@
 #include <stdio.h>
 #include <ac/unistd.h>
 
-#if defined(NEED_FCNTL_LOCKING) && defined(HAVE_FCNTL_H)
+#if defined(NEED_FCNTL_LOCKING)
 
-#include <fcntl.h>
-
-int lutil_ldap_lockf ( FILE *fs ) {
+int lutil_lockf ( FILE *fp ) {
 	struct flock file_lock;
 	memset( &file_lock, 0, sizeof( file_lock ) );
 	file_lock.l_type = F_WRLCK;
 	file_lock.l_whence = SEEK_SET;
 	file_lock.l_start = 0;
 	file_lock.l_len = 0;
-	return( fcntl( fileno( fs ), F_SETLKW, &file_lock ) );
+	return( fcntl( fileno(fp), F_SETLKW, &file_lock ) );
 }
 
-int lutil_ldap_unlockf ( FILE *fs ) {
+int lutil_unlockf ( FILE *fp ) {
 	struct flock file_lock;
 	memset( &file_lock, 0, sizeof( file_lock ) );
 	file_lock.l_type = F_UNLCK;
 	file_lock.l_whence = SEEK_SET;
 	file_lock.l_start = 0;
 	file_lock.l_len = 0;
-	return ( fcntl( fileno( fs ), F_SETLK, &file_lock ) );
+	return ( fcntl( fileno(fp), F_SETLK, &file_lock ) );
 }
 
 #endif /* !HAVE_FILE_LOCKING */
-- 
2.39.5