cherry pick from develop/feature branch.

src/kit/taosdemo/taosdemo.c

@@ -866,8 +866,12 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
             arguments->user = argv[++i];
         } else if (strncmp(argv[i], "-p", 2) == 0) {
             if (strlen(argv[i]) == 2) {
-                printf("Enter password:");
-                scanf("%s", arguments->password);
+                printf("Enter password: ");
+                taosSetConsoleEcho(false);
+                if (scanf("%s", arguments->password) > 1) {
+                    fprintf(stderr, "password read error!\n");
+                }
+                taosSetConsoleEcho(true);
             } else {
                 tstrncpy(arguments->password, (char *)(argv[i] + 2), MAX_PASSWORD_SIZE);
             }

src/kit/taosdump/taosdump.c

@@ -561,9 +561,11 @@ static void parse_password(
         if (strncmp(argv[i], "-p", 2) == 0) {
             if (strlen(argv[i]) == 2) {
                 printf("Enter password: ");
+                taosSetConsoleEcho(false);
                 if(scanf("%20s", arguments->password) > 1) {
                     errorPrint("%s() LN%d, password read error!\n", __func__, __LINE__);
                 }
+                taosSetConsoleEcho(true);
             } else {
                 tstrncpy(arguments->password, (char *)(argv[i] + 2), MAX_PASSWORD_SIZE);
             }

src/os/inc/osSystem.h

@@ -24,6 +24,8 @@ void* taosLoadDll(const char *filename);
 void* taosLoadSym(void* handle, char* name);
 void taosCloseDll(void *handle);
 
+int taosSetConsoleEcho(bool on);
+
 #ifdef __cplusplus
 }
 #endif

src/os/src/darwin/darwinSystem.c

@@ -29,4 +29,30 @@ void* taosLoadSym(void* handle, char* name) {
 void taosCloseDll(void *handle) {
 }
 
+int taosSetConsoleEcho(bool on)
+{
+#if 0
+#define ECHOFLAGS (ECHO | ECHOE | ECHOK | ECHONL)
+    int err;
+    struct termios term;
+
+    if (tcgetattr(STDIN_FILENO, &term) == -1) {
+        perror("Cannot get the attribution of the terminal");
+        return -1;
+    }
+
+    if (on)
+        term.c_lflag|=ECHOFLAGS;
+    else
+        term.c_lflag &=~ECHOFLAGS;
+
+    err = tcsetattr(STDIN_FILENO,TCSAFLUSH,&term);
+    if (err == -1 && err == EINTR) {
+        perror("Cannot set the attribution of the terminal");
+        return -1;
+    }
+
+#endif
+    return 0;
+}
 

src/os/src/linux/osSystem.c

@@ -51,4 +51,28 @@ void taosCloseDll(void *handle) {
   }
 }
 
+int taosSetConsoleEcho(bool on)
+{
+#define ECHOFLAGS (ECHO | ECHOE | ECHOK | ECHONL)
+    int err;
+    struct termios term;
+
+    if (tcgetattr(STDIN_FILENO, &term) == -1) {
+        perror("Cannot get the attribution of the terminal");
+        return -1;
+    }
+
+    if (on)
+        term.c_lflag|=ECHOFLAGS;
+    else
+        term.c_lflag &=~ECHOFLAGS;
+
+    err = tcsetattr(STDIN_FILENO,TCSAFLUSH,&term);
+    if (err == -1 && err == EINTR) {
+        perror("Cannot set the attribution of the terminal");
+        return -1;
+    }
+
+    return 0;
+}
 

src/os/src/windows/wSystem.c

@@ -30,3 +30,17 @@ void taosCloseDll(void *handle) {
 }
 
 
+int taosSetConsoleEcho(bool on)
+{
+    HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE); 
+    DWORD mode = 0;
+    GetConsoleMode(hStdin, &mode );
+    if (on) {
+        mode |= ENABLE_ECHO_INPUT;
+    } else {
+        mode &= ~ENABLE_ECHO_INPUT;
+    }
+    SetConsoleMode(hStdin, mode);
+
+    return 0;
+}