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redis-cli when SELECT fails, we should reset dbnum to 0 (#8898)

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when SELECT fails, we should reset dbnum to 0, so the prompt will not
display incorrectly.

Additionally when SELECT and HELLO fail, we output message to inform
it.

Add config.input_dbnum which means the dbnum about to select.
And config.dbnum means currently selected dbnum. When users succeed to
select db, config.dbnum and config.input_dbnum will be the same. When
users select db failed, config.input_dbnum will be kept. Next time if users
auth success, config.input_dbnum will be automatically selected.
When reconnect, we should select the origin dbnum.

Co-authored-by: Oran Agra <oran@redislabs.com>
(cherry picked from commit 6b475989984bb28499327e33cc79315d6264bc06)
This commit is contained in:
Huang Zhw 2021-05-06 23:34:45 +08:00 committed by Oran Agra
parent 530c70b0a9
commit 1ce06604de
1 changed files with 25 additions and 12 deletions
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37
src/redis-cli.c
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@ -207,7 +207,8 @@ static struct config {
cliSSLconfig sslconfig;
long repeat;
long interval;
int dbnum;
int dbnum; /* db num currently selected */
int input_dbnum; /* db num user input */
int interactive;
int shutdown;
int monitor_mode;
@ -445,7 +446,7 @@ static void parseRedisUri(const char *uri) {
if (curr == end) return;
/* Extract database number. */
config.dbnum = atoi(curr);
config.input_dbnum = atoi(curr);
}
static uint64_t dictSdsHash(const void *key) {
@ -801,15 +802,21 @@ static int cliAuth(redisContext *ctx, char *user, char *auth) {
return REDIS_ERR;
}
/* Send SELECT dbnum to the server */
/* Send SELECT input_dbnum to the server */
static int cliSelect(void) {
redisReply *reply;
if (config.dbnum == 0) return REDIS_OK;
if (config.input_dbnum == config.dbnum) return REDIS_OK;
reply = redisCommand(context,"SELECT %d",config.dbnum);
reply = redisCommand(context,"SELECT %d",config.input_dbnum);
if (reply != NULL) {
int result = REDIS_OK;
if (reply->type == REDIS_REPLY_ERROR) result = REDIS_ERR;
if (reply->type == REDIS_REPLY_ERROR) {
result = REDIS_ERR;
fprintf(stderr,"SELECT %d failed: %s\n",config.input_dbnum,reply->str);
} else {
config.dbnum = config.input_dbnum;
cliRefreshPrompt();
}
freeReplyObject(reply);
return result;
}
@ -824,7 +831,10 @@ static int cliSwitchProto(void) {
reply = redisCommand(context,"HELLO 3");
if (reply != NULL) {
int result = REDIS_OK;
if (reply->type == REDIS_REPLY_ERROR) result = REDIS_ERR;
if (reply->type == REDIS_REPLY_ERROR) {
result = REDIS_ERR;
fprintf(stderr,"HELLO 3 failed: %s\n",reply->str);
}
freeReplyObject(reply);
return result;
}
@ -1434,7 +1444,7 @@ static int cliSendCommand(int argc, char **argv, long repeat) {
if (!strcasecmp(command,"select") && argc == 2 &&
config.last_cmd_type != REDIS_REPLY_ERROR)
{
config.dbnum = atoi(argv[1]);
config.input_dbnum = config.dbnum = atoi(argv[1]);
cliRefreshPrompt();
} else if (!strcasecmp(command,"auth") && (argc == 2 || argc == 3)) {
cliSelect();
@ -1446,15 +1456,17 @@ static int cliSendCommand(int argc, char **argv, long repeat) {
cliRefreshPrompt();
} else if (!strcasecmp(command,"exec") && argc == 1 && config.in_multi) {
config.in_multi = 0;
if (config.last_cmd_type == REDIS_REPLY_ERROR) {
config.dbnum = config.pre_multi_dbnum;
if (config.last_cmd_type == REDIS_REPLY_ERROR ||
config.last_cmd_type == REDIS_REPLY_NIL)
{
config.input_dbnum = config.dbnum = config.pre_multi_dbnum;
}
cliRefreshPrompt();
} else if (!strcasecmp(command,"discard") && argc == 1 &&
config.last_cmd_type != REDIS_REPLY_ERROR)
{
config.in_multi = 0;
config.dbnum = config.pre_multi_dbnum;
config.input_dbnum = config.dbnum = config.pre_multi_dbnum;
cliRefreshPrompt();
}
}
@ -1541,7 +1553,7 @@ static int parseOptions(int argc, char **argv) {
double seconds = atof(argv[++i]);
config.interval = seconds*1000000;
} else if (!strcmp(argv[i],"-n") && !lastarg) {
config.dbnum = atoi(argv[++i]);
config.input_dbnum = atoi(argv[++i]);
} else if (!strcmp(argv[i], "--no-auth-warning")) {
config.no_auth_warning = 1;
} else if (!strcmp(argv[i], "--askpass")) {
@ -8209,6 +8221,7 @@ int main(int argc, char **argv) {
config.repeat = 1;
config.interval = 0;
config.dbnum = 0;
config.input_dbnum = 0;
config.interactive = 0;
config.shutdown = 0;
config.monitor_mode = 0;