From 4cf76d704c0f912e844bca2dad9bc7d96921b7c5 Mon Sep 17 00:00:00 2001
From: teodor <teodor>
Date: Tue, 5 Oct 2004 08:25:25 +0000
Subject: [PATCH] Add linux compatibility - 2

---
 flatdb.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/flatdb.c b/flatdb.c
index 79a1ec6..05dbe34 100644
--- a/flatdb.c
+++ b/flatdb.c
@@ -34,6 +34,7 @@
 #include <errno.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/file.h>
 
 #include "tlog.h"
 #include "tmalloc.h"
@@ -114,9 +115,19 @@ FDBOpen(FDB *db, char *file, int readonly) {
 
 	if ( readonly ) {
 		db->readonly=1;
-		db->fd = open(file, O_RDONLY | O_SHLOCK);
+		db->fd = open(file, O_RDONLY);
+		if ( flock( db->fd, LOCK_SH ) < 0 ) {
+			tlog(TL_CRIT,"FDBOpen: flock failed: %s",strerror(errno));
+			close(db->fd);
+			return FDB_ERROR;
+		} 
 	} else {
-		db->fd = open(file, O_CREAT | O_RDWR | O_EXLOCK, 0666);
+		db->fd = open(file, O_CREAT | O_RDWR, 0666);
+		if ( flock( db->fd, LOCK_EX ) < 0 ) {
+			tlog(TL_CRIT,"FDBOpen: flock failed: %s",strerror(errno));
+			close(db->fd);
+			return FDB_ERROR;
+		} 
 	}
 
 	if ( db->fd < 0 ) {
@@ -128,16 +139,19 @@ FDBOpen(FDB *db, char *file, int readonly) {
 	rc = read(db->fd, &header, sizeof(FDBHeader));
 
 	if ( rc<0 ) {
+		flock( db->fd, LOCK_UN );
 		close(db->fd);
 		tlog(TL_CRIT,"FDBOpen: read failed: %s", strerror(errno));
 		return FDB_ERROR;
 	} else if ( rc==0 ) {
 		memset(&header, 0, sizeof(FDBHeader));
 	} else if ( rc != sizeof(FDBHeader) ) {
+		flock( db->fd, LOCK_UN );
 		close(db->fd);
 		tlog(TL_CRIT,"FDBOpen: header fault: %d bytes only", rc);
 		return FDB_ERROR;
 	} else if ( header.isopened ) {
+		flock( db->fd, LOCK_UN );
 		close(db->fd);
 		tlog(TL_CRIT,"FDBOpen: file wasn't closed correctly");
 		return FDB_ERROR;
@@ -151,6 +165,7 @@ FDBOpen(FDB *db, char *file, int readonly) {
 		
 			if ( lseek(db->fd, header.freespace, SEEK_SET)!=header.freespace || 
 					read( db->fd, db->space,  header.lenfreespace ) !=  header.lenfreespace ) {
+				flock( db->fd, LOCK_UN );
 				close(db->fd);
 				tlog(TL_CRIT,"FDBOpen: free space read failed: %s", strerror(errno));
 				return FDB_ERROR;
@@ -168,6 +183,7 @@ FDBOpen(FDB *db, char *file, int readonly) {
 		if ( lseek(db->fd, 0, SEEK_SET)!=0 || 
 				write(db->fd, &header, sizeof(FDBHeader)) != sizeof(FDBHeader) || 
 				fsync(db->fd) ) {
+			flock( db->fd, LOCK_UN );
 			close(db->fd);
 			if ( db->space ) tfree( db->space );
 			tlog(TL_CRIT,"FDBOpen: can't modify header: %s", strerror(errno));
@@ -217,6 +233,7 @@ FDBClose(FDB *db) {
 			tlog(TL_CRIT|TL_EXIT,"FDBClose: header write  failed: %s", strerror(errno)); 
 	}
 
+	flock( db->fd, LOCK_UN );
 	close(db->fd);
 
 	if ( db->space )
-- 
2.37.3