Remove the write handler only if there are no longer objects in the output queue...

[redis.git] / src / redis-cli.c

diff --git a/src/redis-cli.c b/src/redis-cli.c
index dd67ff84ab2c44315e3f174f0b3d1bdea68e7a83..d0c9d979f014a769e88e78e311bf484f651e8f08 100644 (file)
--- a/src/redis-cli.c
+++ b/src/redis-cli.c
@@ -55,21 +55,22 @@ static struct config {
     int hostport;
     char *hostsocket;
     long repeat;
     int hostport;
     char *hostsocket;
     long repeat;

+    long interval;

     int dbnum;
     int interactive;
     int shutdown;
     int monitor_mode;
     int pubsub_mode;
     int dbnum;
     int interactive;
     int shutdown;
     int monitor_mode;
     int pubsub_mode;

-    int raw_output; /* output mode per command */
-    int tty; /* flag for default output format */

     int stdinarg; /* get last arg from stdin. (-x option) */
     int stdinarg; /* get last arg from stdin. (-x option) */

-    char mb_sep;

     char *auth;
     char *auth;

-    char *historyfile;
+    int raw_output; /* output mode per command */
+    sds mb_delim;
+    char prompt[32];

 } config;
 
 static void usage();
 char *redisGitSHA1(void);
 } config;
 
 static void usage();
 char *redisGitSHA1(void);

+char *redisGitDirty(void);

 
 /*------------------------------------------------------------------------------
  * Utility functions
 
 /*------------------------------------------------------------------------------
  * Utility functions


@@ -85,10 +86,77 @@ static long long mstime(void) {
     return mst;
 }
 
     return mst;
 }
 

+static void cliRefreshPrompt(void) {
+    if (config.dbnum == 0)
+        snprintf(config.prompt,sizeof(config.prompt),"redis %s:%d> ",
+            config.hostip, config.hostport);
+    else
+        snprintf(config.prompt,sizeof(config.prompt),"redis %s:%d[%d]> ",
+            config.hostip, config.hostport, config.dbnum);
+}
+

 /*------------------------------------------------------------------------------
  * Help functions
  *--------------------------------------------------------------------------- */
 
 /*------------------------------------------------------------------------------
  * Help functions
  *--------------------------------------------------------------------------- */
 

+#define CLI_HELP_COMMAND 1
+#define CLI_HELP_GROUP 2
+
+typedef struct {
+    int type;
+    int argc;
+    sds *argv;
+    sds full;
+
+    /* Only used for help on commands */
+    struct commandHelp *org;
+} helpEntry;
+
+static helpEntry *helpEntries;
+static int helpEntriesLen;
+
+static sds cliVersion() {
+    sds version;
+    version = sdscatprintf(sdsempty(), "%s", REDIS_VERSION);
+
+    /* Add git commit and working tree status when available */
+    if (strtoll(redisGitSHA1(),NULL,16)) {
+        version = sdscatprintf(version, " (git:%s", redisGitSHA1());
+        if (strtoll(redisGitDirty(),NULL,10))
+            version = sdscatprintf(version, "-dirty");
+        version = sdscat(version, ")");
+    }
+    return version;
+}
+
+static void cliInitHelp() {
+    int commandslen = sizeof(commandHelp)/sizeof(struct commandHelp);
+    int groupslen = sizeof(commandGroups)/sizeof(char*);
+    int i, len, pos = 0;
+    helpEntry tmp;
+
+    helpEntriesLen = len = commandslen+groupslen;
+    helpEntries = malloc(sizeof(helpEntry)*len);
+
+    for (i = 0; i < groupslen; i++) {
+        tmp.argc = 1;
+        tmp.argv = malloc(sizeof(sds));
+        tmp.argv[0] = sdscatprintf(sdsempty(),"@%s",commandGroups[i]);
+        tmp.full = tmp.argv[0];
+        tmp.type = CLI_HELP_GROUP;
+        tmp.org = NULL;
+        helpEntries[pos++] = tmp;
+    }
+
+    for (i = 0; i < commandslen; i++) {
+        tmp.argv = sdssplitargs(commandHelp[i].name,&tmp.argc);
+        tmp.full = sdsnew(commandHelp[i].name);
+        tmp.type = CLI_HELP_COMMAND;
+        tmp.org = &commandHelp[i];
+        helpEntries[pos++] = tmp;
+    }
+}
+

 /* Output command help to stdout. */
 static void cliOutputCommandHelp(struct commandHelp *help, int group) {
     printf("\r\n  \x1b[1m%s\x1b[0m \x1b[90m%s\x1b[0m\r\n", help->name, help->params);
 /* Output command help to stdout. */
 static void cliOutputCommandHelp(struct commandHelp *help, int group) {
     printf("\r\n  \x1b[1m%s\x1b[0m \x1b[90m%s\x1b[0m\r\n", help->name, help->params);


@@ -101,21 +169,24 @@ static void cliOutputCommandHelp(struct commandHelp *help, int group) {
 
 /* Print generic help. */
 static void cliOutputGenericHelp() {
 
 /* Print generic help. */
 static void cliOutputGenericHelp() {

+    sds version = cliVersion();

     printf(
         "redis-cli %s\r\n"
         "Type: \"help @<group>\" to get a list of commands in <group>\r\n"
         "      \"help <command>\" for help on <command>\r\n"
         "      \"help <tab>\" to get a list of possible help topics\r\n"
         "      \"quit\" to exit\r\n",
     printf(
         "redis-cli %s\r\n"
         "Type: \"help @<group>\" to get a list of commands in <group>\r\n"
         "      \"help <command>\" for help on <command>\r\n"
         "      \"help <tab>\" to get a list of possible help topics\r\n"
         "      \"quit\" to exit\r\n",

-        REDIS_VERSION
+        version

     );
     );

+    sdsfree(version);

 }
 
 /* Output all command help, filtering by group or command name. */
 static void cliOutputHelp(int argc, char **argv) {
 }
 
 /* Output all command help, filtering by group or command name. */
 static void cliOutputHelp(int argc, char **argv) {

-    int i, len;
-    struct commandHelp *help;
+    int i, j, len;

     int group = -1;
     int group = -1;

+    helpEntry *entry;
+    struct commandHelp *help;

 
     if (argc == 0) {
         cliOutputGenericHelp();
 
     if (argc == 0) {
         cliOutputGenericHelp();


@@ -130,13 +201,21 @@ static void cliOutputHelp(int argc, char **argv) {
         }
     }
 
         }
     }
 

-    len = sizeof(commandHelp)/sizeof(struct commandHelp);

     assert(argc > 0);
     assert(argc > 0);

-    for (i = 0; i < len; i++) {
-        help = &commandHelp[i];
+    for (i = 0; i < helpEntriesLen; i++) {
+        entry = &helpEntries[i];
+        if (entry->type != CLI_HELP_COMMAND) continue;
+
+        help = entry->org;

         if (group == -1) {
         if (group == -1) {

-            if (strcasecmp(help->name, argv[0]) == 0) {
-                cliOutputCommandHelp(help,1);
+            /* Compare all arguments */
+            if (argc == entry->argc) {
+                for (j = 0; j < argc; j++) {
+                    if (strcasecmp(argv[j],entry->argv[j]) != 0) break;
+                }
+                if (j == argc) {
+                    cliOutputCommandHelp(help,1);
+                }

             }
         } else {
             if (group == help->group) {
             }
         } else {
             if (group == help->group) {


@@ -147,69 +226,30 @@ static void cliOutputHelp(int argc, char **argv) {
     printf("\r\n");
 }
 
     printf("\r\n");
 }
 

-#define CLI_COMPLETE_COMMAND 1
-#define CLI_COMPLETE_GROUP 2
-
-typedef struct {
-    char *name;
-    int type;
-} completionEntry;
-
-static completionEntry *completionEntries;
-static int completionEntriesLen;
-
-/* Build 2 different arrays for completion. One for raw command completion and one
- * for completion using HELP (including groups). */
-static void cliInitHelp() {
-    int commandslen = sizeof(commandHelp)/sizeof(struct commandHelp);
-    int groupslen = sizeof(commandGroups)/sizeof(char*);
-    int i, len, pos = 0;
-    completionEntry tmp;
-
-    completionEntriesLen = len = commandslen+groupslen;
-    completionEntries = malloc(sizeof(completionEntry)*len);
-
-    for (i = 0; i < groupslen; i++) {
-        tmp.name = malloc(strlen(commandGroups[i]+2));
-        sprintf(tmp.name,"@%s",commandGroups[i]);
-        tmp.type = CLI_COMPLETE_GROUP;
-        completionEntries[pos++] = tmp;
-    }
-
-    for (i = 0; i < commandslen; i++) {
-        tmp.name = commandHelp[i].name;
-        tmp.type = CLI_COMPLETE_COMMAND;
-        completionEntries[pos++] = tmp;
-    }
-}
-

 static void completionCallback(const char *buf, linenoiseCompletions *lc) {
     size_t startpos = 0;
     int mask;
     int i;
     size_t matchlen;
 static void completionCallback(const char *buf, linenoiseCompletions *lc) {
     size_t startpos = 0;
     int mask;
     int i;
     size_t matchlen;

-    char *tmp;
-    size_t tmpsize;
+    sds tmp;

 
     if (strncasecmp(buf,"help ",5) == 0) {
         startpos = 5;
         while (isspace(buf[startpos])) startpos++;
 
     if (strncasecmp(buf,"help ",5) == 0) {
         startpos = 5;
         while (isspace(buf[startpos])) startpos++;

-        mask = CLI_COMPLETE_COMMAND | CLI_COMPLETE_GROUP;
+        mask = CLI_HELP_COMMAND | CLI_HELP_GROUP;

     } else {
     } else {

-        mask = CLI_COMPLETE_COMMAND;
+        mask = CLI_HELP_COMMAND;

     }
 
     }
 

-    for (i = 0; i < completionEntriesLen; i++) {
-        if (!(completionEntries[i].type & mask)) continue;
+    for (i = 0; i < helpEntriesLen; i++) {
+        if (!(helpEntries[i].type & mask)) continue;

 
         matchlen = strlen(buf+startpos);
 
         matchlen = strlen(buf+startpos);

-        if (strncasecmp(buf+startpos,completionEntries[i].name,matchlen) == 0) {
-            tmpsize = startpos+strlen(completionEntries[i].name)+1;
-            tmp = malloc(tmpsize);
-            memcpy(tmp,buf,startpos);
-            memcpy(tmp+startpos,completionEntries[i].name,tmpsize-startpos);
+        if (strncasecmp(buf+startpos,helpEntries[i].full,matchlen) == 0) {
+            tmp = sdsnewlen(buf,startpos);
+            tmp = sdscat(tmp,helpEntries[i].full);

             linenoiseAddCompletion(lc,tmp);
             linenoiseAddCompletion(lc,tmp);

-            free(tmp);
+            sdsfree(tmp);

         }
     }
 }
         }
     }
 }


@@ -234,11 +274,9 @@ static int cliAuth() {
 /* Send SELECT dbnum to the server */
 static int cliSelect() {
     redisReply *reply;
 /* Send SELECT dbnum to the server */
 static int cliSelect() {
     redisReply *reply;

-    char dbnum[16];

     if (config.dbnum == 0) return REDIS_OK;
 
     if (config.dbnum == 0) return REDIS_OK;
 

-    snprintf(dbnum,sizeof(dbnum),"%d",config.dbnum);
-    reply = redisCommand(context,"SELECT %s",dbnum);
+    reply = redisCommand(context,"SELECT %d",config.dbnum);

     if (reply != NULL) {
         freeReplyObject(reply);
         return REDIS_OK;
     if (reply != NULL) {
         freeReplyObject(reply);
         return REDIS_OK;


@@ -279,36 +317,29 @@ static int cliConnect(int force) {
     return REDIS_OK;
 }
 
     return REDIS_OK;
 }
 

-static void cliPrintContextErrorAndExit() {
+static void cliPrintContextError() {

     if (context == NULL) return;
     fprintf(stderr,"Error: %s\n",context->errstr);
     if (context == NULL) return;
     fprintf(stderr,"Error: %s\n",context->errstr);

-    exit(1);

 }
 
 }
 

-static sds cliFormatReply(redisReply *r, char *prefix) {
+static sds cliFormatReplyTTY(redisReply *r, char *prefix) {

     sds out = sdsempty();
     switch (r->type) {
     case REDIS_REPLY_ERROR:
     sds out = sdsempty();
     switch (r->type) {
     case REDIS_REPLY_ERROR:

-        if (config.tty) out = sdscat(out,"(error) ");
-        out = sdscatprintf(out,"%s\n", r->str);
+        out = sdscatprintf(out,"(error) %s\n", r->str);

     break;
     case REDIS_REPLY_STATUS:
         out = sdscat(out,r->str);
         out = sdscat(out,"\n");
     break;
     case REDIS_REPLY_INTEGER:
     break;
     case REDIS_REPLY_STATUS:
         out = sdscat(out,r->str);
         out = sdscat(out,"\n");
     break;
     case REDIS_REPLY_INTEGER:

-        if (config.tty) out = sdscat(out,"(integer) ");
-        out = sdscatprintf(out,"%lld\n",r->integer);
+        out = sdscatprintf(out,"(integer) %lld\n",r->integer);

     break;
     case REDIS_REPLY_STRING:
     break;
     case REDIS_REPLY_STRING:

-        if (config.raw_output || !config.tty) {
-            out = sdscatlen(out,r->str,r->len);
-        } else {
-            /* If you are producing output for the standard output we want
-             * a more interesting output with quoted characters and so forth */
-            out = sdscatrepr(out,r->str,r->len);
-            out = sdscat(out,"\n");
-        }
+        /* If you are producing output for the standard output we want
+        * a more interesting output with quoted characters and so forth */
+        out = sdscatrepr(out,r->str,r->len);
+        out = sdscat(out,"\n");

     break;
     case REDIS_REPLY_NIL:
         out = sdscat(out,"(nil)\n");
     break;
     case REDIS_REPLY_NIL:
         out = sdscat(out,"(nil)\n");


@@ -344,7 +375,7 @@ static sds cliFormatReply(redisReply *r, char *prefix) {
                 out = sdscatprintf(out,_prefixfmt,i == 0 ? "" : prefix,i+1);
 
                 /* Format the multi bulk entry */
                 out = sdscatprintf(out,_prefixfmt,i == 0 ? "" : prefix,i+1);
 
                 /* Format the multi bulk entry */

-                tmp = cliFormatReply(r->element[i],_prefix);
+                tmp = cliFormatReplyTTY(r->element[i],_prefix);

                 out = sdscatlen(out,tmp,sdslen(tmp));
                 sdsfree(tmp);
             }
                 out = sdscatlen(out,tmp,sdslen(tmp));
                 sdsfree(tmp);
             }


@@ -358,11 +389,46 @@ static sds cliFormatReply(redisReply *r, char *prefix) {
     return out;
 }
 
     return out;
 }
 

-static int cliReadReply() {
+static sds cliFormatReplyRaw(redisReply *r) {
+    sds out = sdsempty(), tmp;
+    size_t i;
+
+    switch (r->type) {
+    case REDIS_REPLY_NIL:
+        /* Nothing... */
+        break;
+    case REDIS_REPLY_ERROR:
+        out = sdscatlen(out,r->str,r->len);
+        out = sdscatlen(out,"\n",1);
+        break;
+    case REDIS_REPLY_STATUS:
+    case REDIS_REPLY_STRING:
+        out = sdscatlen(out,r->str,r->len);
+        break;
+    case REDIS_REPLY_INTEGER:
+        out = sdscatprintf(out,"%lld",r->integer);
+        break;
+    case REDIS_REPLY_ARRAY:
+        for (i = 0; i < r->elements; i++) {
+            if (i > 0) out = sdscat(out,config.mb_delim);
+            tmp = cliFormatReplyRaw(r->element[i]);
+            out = sdscatlen(out,tmp,sdslen(tmp));
+            sdsfree(tmp);
+        }
+        break;
+    default:
+        fprintf(stderr,"Unknown reply type: %d\n", r->type);
+        exit(1);
+    }
+    return out;
+}
+
+static int cliReadReply(int output_raw_strings) {
+    void *_reply;

     redisReply *reply;
     sds out;
 
     redisReply *reply;
     sds out;
 

-    if (redisGetReply(context,(void**)&reply) != REDIS_OK) {
+    if (redisGetReply(context,&_reply) != REDIS_OK) {

         if (config.shutdown)
             return REDIS_OK;
         if (config.interactive) {
         if (config.shutdown)
             return REDIS_OK;
         if (config.interactive) {


@@ -372,23 +438,47 @@ static int cliReadReply() {
             if (context->err == REDIS_ERR_EOF)
                 return REDIS_ERR;
         }
             if (context->err == REDIS_ERR_EOF)
                 return REDIS_ERR;
         }

-        cliPrintContextErrorAndExit();
+        cliPrintContextError();
+        exit(1);

         return REDIS_ERR; /* avoid compiler warning */
     }
 
         return REDIS_ERR; /* avoid compiler warning */
     }
 

-    out = cliFormatReply(reply,"");
-    freeReplyObject(reply);
+    reply = (redisReply*)_reply;
+    if (output_raw_strings) {
+        out = cliFormatReplyRaw(reply);
+    } else {
+        if (config.raw_output) {
+            out = cliFormatReplyRaw(reply);
+            out = sdscat(out,"\n");
+        } else {
+            out = cliFormatReplyTTY(reply,"");
+        }
+    }

     fwrite(out,sdslen(out),1,stdout);
     sdsfree(out);
     fwrite(out,sdslen(out),1,stdout);
     sdsfree(out);

+    freeReplyObject(reply);

     return REDIS_OK;
 }
 
 static int cliSendCommand(int argc, char **argv, int repeat) {
     char *command = argv[0];
     size_t *argvlen;
     return REDIS_OK;
 }
 
 static int cliSendCommand(int argc, char **argv, int repeat) {
     char *command = argv[0];
     size_t *argvlen;

-    int j;
+    int j, output_raw;
+
+    if (context == NULL) return REDIS_ERR;
+
+    output_raw = 0;
+    if (!strcasecmp(command,"info") ||
+        (argc == 2 && !strcasecmp(command,"cluster") &&
+                      (!strcasecmp(argv[1],"nodes") ||
+                       !strcasecmp(argv[1],"info"))) ||
+        (argc == 2 && !strcasecmp(command,"client") &&
+                       !strcasecmp(argv[1],"list")))
+
+    {
+        output_raw = 1;
+    }

 
 

-    config.raw_output = !strcasecmp(command,"info");

     if (!strcasecmp(command,"help") || !strcasecmp(command,"?")) {
         cliOutputHelp(--argc, ++argv);
         return REDIS_OK;
     if (!strcasecmp(command,"help") || !strcasecmp(command,"?")) {
         cliOutputHelp(--argc, ++argv);
         return REDIS_OK;


@@ -406,20 +496,33 @@ static int cliSendCommand(int argc, char **argv, int repeat) {
     while(repeat--) {
         redisAppendCommandArgv(context,argc,(const char**)argv,argvlen);
         while (config.monitor_mode) {
     while(repeat--) {
         redisAppendCommandArgv(context,argc,(const char**)argv,argvlen);
         while (config.monitor_mode) {

-            if (cliReadReply() != REDIS_OK) exit(1);
+            if (cliReadReply(output_raw) != REDIS_OK) exit(1);

             fflush(stdout);
         }
 
         if (config.pubsub_mode) {
             fflush(stdout);
         }
 
         if (config.pubsub_mode) {

-            printf("Reading messages... (press Ctrl-C to quit)\n");
+            if (!config.raw_output)
+                printf("Reading messages... (press Ctrl-C to quit)\n");

             while (1) {
             while (1) {

-                if (cliReadReply() != REDIS_OK) exit(1);
+                if (cliReadReply(output_raw) != REDIS_OK) exit(1);

             }
         }
 
             }
         }
 

-        if (cliReadReply() != REDIS_OK)
+        if (cliReadReply(output_raw) != REDIS_OK) {
+            free(argvlen);

             return REDIS_ERR;
             return REDIS_ERR;

+        } else {
+            /* Store database number when SELECT was successfully executed. */
+            if (!strcasecmp(command,"select") && argc == 2) {
+                config.dbnum = atoi(argv[1]);
+                cliRefreshPrompt();
+            }
+        }
+        if (config.interval) usleep(config.interval);
+        fflush(stdout); /* Make it grep friendly */

     }
     }

+
+    free(argvlen);

     return REDIS_OK;
 }
 
     return REDIS_OK;
 }
 


@@ -434,10 +537,13 @@ static int parseOptions(int argc, char **argv) {
         int lastarg = i==argc-1;
 
         if (!strcmp(argv[i],"-h") && !lastarg) {
         int lastarg = i==argc-1;
 
         if (!strcmp(argv[i],"-h") && !lastarg) {

-            config.hostip = argv[i+1];
+            sdsfree(config.hostip);
+            config.hostip = sdsnew(argv[i+1]);

             i++;
         } else if (!strcmp(argv[i],"-h") && lastarg) {
             usage();
             i++;
         } else if (!strcmp(argv[i],"-h") && lastarg) {
             usage();

+        } else if (!strcmp(argv[i],"--help")) {
+            usage();

         } else if (!strcmp(argv[i],"-x")) {
             config.stdinarg = 1;
         } else if (!strcmp(argv[i],"-p") && !lastarg) {
         } else if (!strcmp(argv[i],"-x")) {
             config.stdinarg = 1;
         } else if (!strcmp(argv[i],"-p") && !lastarg) {


@@ -449,25 +555,26 @@ static int parseOptions(int argc, char **argv) {
         } else if (!strcmp(argv[i],"-r") && !lastarg) {
             config.repeat = strtoll(argv[i+1],NULL,10);
             i++;
         } else if (!strcmp(argv[i],"-r") && !lastarg) {
             config.repeat = strtoll(argv[i+1],NULL,10);
             i++;

+        } else if (!strcmp(argv[i],"-i") && !lastarg) {
+            double seconds = atof(argv[i+1]);
+            config.interval = seconds*1000000;
+            i++;

         } else if (!strcmp(argv[i],"-n") && !lastarg) {
             config.dbnum = atoi(argv[i+1]);
             i++;
         } else if (!strcmp(argv[i],"-a") && !lastarg) {
             config.auth = argv[i+1];
             i++;
         } else if (!strcmp(argv[i],"-n") && !lastarg) {
             config.dbnum = atoi(argv[i+1]);
             i++;
         } else if (!strcmp(argv[i],"-a") && !lastarg) {
             config.auth = argv[i+1];
             i++;

-        } else if (!strcmp(argv[i],"-i")) {
-            fprintf(stderr,
-"Starting interactive mode using -i is deprecated. Interactive mode is started\n"
-"by default when redis-cli is executed without a command to execute.\n"
-            );
-        } else if (!strcmp(argv[i],"-c")) {
-            fprintf(stderr,
-"Reading last argument from standard input using -c is deprecated.\n"
-"When standard input is connected to a pipe or regular file, it is\n"
-"automatically used as last argument.\n"
-            );
-        } else if (!strcmp(argv[i],"-v")) {
-            printf("redis-cli shipped with Redis version %s (%s)\n", REDIS_VERSION, redisGitSHA1());
+        } else if (!strcmp(argv[i],"--raw")) {
+            config.raw_output = 1;
+        } else if (!strcmp(argv[i],"-d") && !lastarg) {
+            sdsfree(config.mb_delim);
+            config.mb_delim = sdsnew(argv[i+1]);
+            i++;
+        } else if (!strcmp(argv[i],"-v") || !strcmp(argv[i], "--version")) {
+            sds version = cliVersion();
+            printf("redis-cli %s\n", version);
+            sdsfree(version);

             exit(0);
         } else {
             break;
             exit(0);
         } else {
             break;


@@ -494,12 +601,36 @@ static sds readArgFromStdin(void) {
 }
 
 static void usage() {
 }
 
 static void usage() {

-    fprintf(stderr, "usage: redis-cli [-iv] [-h host] [-p port] [-s /path/to/socket] [-a authpw] [-r repeat_times] [-n db_num] cmd arg1 arg2 arg3 ... argN\n");
-    fprintf(stderr, "usage: echo \"argN\" | redis-cli -x [options] cmd arg1 arg2 ... arg(N-1)\n\n");
-    fprintf(stderr, "example: cat /etc/passwd | redis-cli -x set my_passwd\n");
-    fprintf(stderr, "example: redis-cli get my_passwd\n");
-    fprintf(stderr, "example: redis-cli -r 100 lpush mylist x\n");
-    fprintf(stderr, "\nRun in interactive mode: redis-cli -i or just don't pass any command\n");
+    sds version = cliVersion();
+    fprintf(stderr,
+"redis-cli %s\n"
+"\n"
+"Usage: redis-cli [OPTIONS] [cmd [arg [arg ...]]]\n"
+"  -h <hostname>    Server hostname (default: 127.0.0.1)\n"
+"  -p <port>        Server port (default: 6379)\n"
+"  -s <socket>      Server socket (overrides hostname and port)\n"
+"  -a <password>    Password to use when connecting to the server\n"
+"  -r <repeat>      Execute specified command N times\n"
+"  -i <interval>    When -r is used, waits <interval> seconds per command.\n"
+"                   It is possible to specify sub-second times like -i 0.1.\n"
+"  -n <db>          Database number\n"
+"  -x               Read last argument from STDIN\n"
+"  -d <delimiter>   Multi-bulk delimiter in for raw formatting (default: \\n)\n"
+"  --raw            Use raw formatting for replies (default when STDOUT is not a tty)\n"
+"  --help           Output this help and exit\n"
+"  --version        Output version and exit\n"
+"\n"
+"Examples:\n"
+"  cat /etc/passwd | redis-cli -x set mypasswd\n"
+"  redis-cli get mypasswd\n"
+"  redis-cli -r 100 lpush mylist x\n"
+"  redis-cli -r 100 -i 1 info | grep used_memory_human:\n"
+"\n"
+"When no command is given, redis-cli starts in interactive mode.\n"
+"Type \"help\" in interactive mode for information on available commands.\n"
+"\n",
+        version);
+    sdsfree(version);

     exit(1);
 }
 
     exit(1);
 }
 


@@ -516,17 +647,32 @@ static char **convertToSds(int count, char** args) {
 
 #define LINE_BUFLEN 4096
 static void repl() {
 
 #define LINE_BUFLEN 4096
 static void repl() {

-    int argc, j;
+    sds historyfile = NULL;
+    int history = 0;

     char *line;
     char *line;

+    int argc;

     sds *argv;
 
     config.interactive = 1;
     linenoiseSetCompletionCallback(completionCallback);
     sds *argv;
 
     config.interactive = 1;
     linenoiseSetCompletionCallback(completionCallback);

-    while((line = linenoise("redis> ")) != NULL) {
+
+    /* Only use history when stdin is a tty. */
+    if (isatty(fileno(stdin))) {
+        history = 1;
+
+        if (getenv("HOME") != NULL) {
+            historyfile = sdscatprintf(sdsempty(),"%s/.rediscli_history",getenv("HOME"));
+            linenoiseHistoryLoad(historyfile);
+        }
+    }
+
+    cliRefreshPrompt();
+    while((line = linenoise(context ? config.prompt : "not connected> ")) != NULL) {

         if (line[0] != '\0') {
             argv = sdssplitargs(line,&argc);
         if (line[0] != '\0') {
             argv = sdssplitargs(line,&argc);

-            linenoiseHistoryAdd(line);
-            if (config.historyfile) linenoiseHistorySave(config.historyfile);
+            if (history) linenoiseHistoryAdd(line);
+            if (historyfile) linenoiseHistorySave(historyfile);
+

             if (argv == NULL) {
                 printf("Invalid argument(s)\n");
                 continue;
             if (argv == NULL) {
                 printf("Invalid argument(s)\n");
                 continue;


@@ -535,19 +681,34 @@ static void repl() {
                     strcasecmp(argv[0],"exit") == 0)
                 {
                     exit(0);
                     strcasecmp(argv[0],"exit") == 0)
                 {
                     exit(0);

+                } else if (argc == 3 && !strcasecmp(argv[0],"connect")) {
+                    sdsfree(config.hostip);
+                    config.hostip = sdsnew(argv[1]);
+                    config.hostport = atoi(argv[2]);
+                    cliConnect(1);
+                } else if (argc == 1 && !strcasecmp(argv[0],"clear")) {
+                    linenoiseClearScreen();

                 } else {
                     long long start_time = mstime(), elapsed;
                 } else {
                     long long start_time = mstime(), elapsed;

+                    int repeat, skipargs = 0;

 
 

-                    if (cliSendCommand(argc,argv,1) != REDIS_OK) {
-                        printf("Reconnecting... ");
-                        fflush(stdout);
-                        if (cliConnect(1) != REDIS_OK) exit(1);
-                        printf("OK\n");
+                    repeat = atoi(argv[0]);
+                    if (repeat) {
+                        skipargs = 1;
+                    } else {
+                        repeat = 1;
+                    }

 
 

-                        /* If we still cannot send the command,
-                         * print error and abort. */
-                        if (cliSendCommand(argc,argv,1) != REDIS_OK)
-                            cliPrintContextErrorAndExit();
+                    if (cliSendCommand(argc-skipargs,argv+skipargs,repeat)
+                        != REDIS_OK)
+                    {
+                        cliConnect(1);
+
+                        /* If we still cannot send the command print error.
+                         * We'll try to reconnect the next time. */
+                        if (cliSendCommand(argc-skipargs,argv+skipargs,repeat)
+                            != REDIS_OK)
+                            cliPrintContextError();

                     }
                     elapsed = mstime()-start_time;
                     if (elapsed >= 500) {
                     }
                     elapsed = mstime()-start_time;
                     if (elapsed >= 500) {


@@ -556,8 +717,7 @@ static void repl() {
                 }
             }
             /* Free the argument vector */
                 }
             }
             /* Free the argument vector */

-            for (j = 0; j < argc; j++)
-                sdsfree(argv[j]);
+            while(argc--) sdsfree(argv[argc]);

             zfree(argv);
         }
         /* linenoise() returns malloc-ed lines like readline() */
             zfree(argv);
         }
         /* linenoise() returns malloc-ed lines like readline() */


@@ -582,38 +742,35 @@ static int noninteractive(int argc, char **argv) {
 int main(int argc, char **argv) {
     int firstarg;
 
 int main(int argc, char **argv) {
     int firstarg;
 

-    config.hostip = "127.0.0.1";
+    config.hostip = sdsnew("127.0.0.1");

     config.hostport = 6379;
     config.hostsocket = NULL;
     config.repeat = 1;
     config.hostport = 6379;
     config.hostsocket = NULL;
     config.repeat = 1;

+    config.interval = 0;

     config.dbnum = 0;
     config.interactive = 0;
     config.shutdown = 0;
     config.monitor_mode = 0;
     config.pubsub_mode = 0;
     config.dbnum = 0;
     config.interactive = 0;
     config.shutdown = 0;
     config.monitor_mode = 0;
     config.pubsub_mode = 0;

-    config.raw_output = 0;

     config.stdinarg = 0;
     config.auth = NULL;
     config.stdinarg = 0;
     config.auth = NULL;

-    config.historyfile = NULL;
-    config.tty = isatty(fileno(stdout)) || (getenv("FAKETTY") != NULL);
-    config.mb_sep = '\n';
+    config.raw_output = !isatty(fileno(stdout)) && (getenv("FAKETTY") == NULL);
+    config.mb_delim = sdsnew("\n");

     cliInitHelp();
 
     cliInitHelp();
 

-    if (getenv("HOME") != NULL) {
-        config.historyfile = malloc(256);
-        snprintf(config.historyfile,256,"%s/.rediscli_history",getenv("HOME"));
-        linenoiseHistoryLoad(config.historyfile);
-    }
-

     firstarg = parseOptions(argc,argv);
     argc -= firstarg;
     argv += firstarg;
 
     firstarg = parseOptions(argc,argv);
     argc -= firstarg;
     argv += firstarg;
 

-    /* Try to connect */
-    if (cliConnect(0) != REDIS_OK) exit(1);
-

     /* Start interactive mode when no command is provided */
     /* Start interactive mode when no command is provided */

-    if (argc == 0) repl();
+    if (argc == 0) {
+        /* Note that in repl mode we don't abort on connection error.
+         * A new attempt will be performed for every command send. */
+        cliConnect(0);
+        repl();
+    }
+

     /* Otherwise, we have some arguments to execute */
     /* Otherwise, we have some arguments to execute */

+    if (cliConnect(0) != REDIS_OK) exit(1);

     return noninteractive(argc,convertToSds(argc,argv));
 }
     return noninteractive(argc,convertToSds(argc,argv));
 }