refactor(tools): refact shell codes

tools/shell/src/shellArguments.c

@@ -207,7 +207,6 @@ static struct argp_option shellOptions[] = {
 
 static error_t shellParseOpt(int32_t key, char *arg, struct argp_state *state) {
   SShellArgs *arguments = &shell.args;
-  wordexp_t   full_path = {0};
 
   switch (key) {
     case 'h':

tools/shell/src/shellEngine.c

@@ -178,7 +178,6 @@ int32_t shellRunCommand(char *command) {
 
 void shellRunSingleCommandImp(char *command) {
   int64_t st, et;
-  wordexp_t full_path;
   char   *sptr = NULL;
   char   *cptr = NULL;
   char   *fname = NULL;
@@ -250,10 +249,6 @@ void shellRunSingleCommandImp(char *command) {
 
   printf("\n");
 
-  if (fname != NULL) {
-    wordfree(&full_path);
-  }
-
   atomic_store_64(&shell.result, 0);
 }
 
@@ -396,7 +391,7 @@ int32_t shellDumpResultToFile(const char *fname, TAOS_RES *tres) {
     row = taos_fetch_row(tres);
   } while (row != NULL);
 
-  shell.result = 0;
+  atomic_store_64(&shell.result, 0);
   taosCloseFile(&pFile);
 
   return numOfRows;
@@ -862,7 +857,7 @@ void shellGetGrantInfo() {
               taos_get_server_info(shell.conn), expiretime);
     }
 
-    shell.result = 0;
+    atomic_store_64(&shell.result, 0);
     taos_free_result(tres);
   }
 

tools/shell/src/shellMain.c

@@ -20,11 +20,11 @@ SShellObj shell = {0};
 
 int main(int argc, char *argv[]) {
   if (shellCheckIntSize() != 0) {
-    return 0;
+    return -1;
   }
 
   if (shellParseArgs(argc, argv) != 0) {
-    return 0;
+    return -1;
   }
 
   if (shell.args.is_version) {
@@ -38,6 +38,7 @@ int main(int argc, char *argv[]) {
   }
 
   if (shell.args.is_help) {
+    shellPrintVersion();
     return 0;
   }