replace read/write with tread/twrite in wal.

src/wal/src/walMain.c

@@ -28,6 +28,7 @@
 #include "taoserror.h"
 #include "twal.h"
 #include "tqueue.h"
+#include "tfile.h"
 
 #define walPrefix "wal"
 
@@ -180,7 +181,7 @@ int walWrite(void *handle, SWalHead *pHead) {
   taosCalcChecksumAppend(0, (uint8_t *)pHead, sizeof(SWalHead));
   int contLen = pHead->len + sizeof(SWalHead);
 
-  if(write(pWal->fd, pHead, contLen) != contLen) {
+  if(twrite(pWal->fd, pHead, contLen) != contLen) {
     wError("wal:%s, failed to write(%s)", pWal->name, strerror(errno));
     terrno = TAOS_SYSTEM_ERROR(errno);
   } else {
@@ -325,7 +326,7 @@ static int walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp) {
   wDebug("wal:%s, start to restore", name);
 
   while (1) {
-    int ret = read(fd, pHead, sizeof(SWalHead));
+    int ret = tread(fd, pHead, sizeof(SWalHead));
     if ( ret == 0)  break;  
 
     if (ret != sizeof(SWalHead)) {
@@ -340,7 +341,7 @@ static int walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp) {
       break;
     } 
 
-    ret = read(fd, pHead->cont, pHead->len);
+    ret = tread(fd, pHead->cont, pHead->len);
     if ( ret != pHead->len) {
       wWarn("wal:%s, failed to read body, skip, len:%d ret:%d", name, pHead->len, ret);
       terrno = TAOS_SYSTEM_ERROR(errno);