Imporant bug leading to data corruption fixed (NOT affecting stable...

Imporant bug leading to data corruption fixed (NOT affecting stable distribution), Tcl client lib MSET/MSETNX implementation fixed, Added new tests for MSET and MSETNX in test-redis.tcl

client-libraries/tcl/redis.tcl

@@ -27,7 +27,7 @@ foreach redis_bulk_cmd {
 
 # Flag commands requiring last argument as a bulk write operation
 foreach redis_multibulk_cmd {
-    mset
+    mset msetnx
 } {
     set ::redis::multibulkarg($redis_multibulk_cmd) {}
 }
@@ -53,12 +53,13 @@ proc ::redis::__dispatch__ {id method args} {
             append cmd [lindex $args end]
             ::redis::redis_writenl $fd $cmd
         } elseif {[info exists ::redis::multibulkarg($method)]} {
-            set cmd "*[expr {[llength $args]}+1]\r\n"
+            set cmd "*[expr {[llength $args]+1}]\r\n"
             append cmd "$[string length $method]\r\n$method\r\n"
             foreach a $args {
                 append cmd "$[string length $a]\r\n$a\r\n"
             }
             ::redis::redis_write $fd $cmd
+            flush $fd
         } else {
             set cmd "$method "
             append cmd [join $args]

redis.c

@@ -1936,7 +1936,7 @@ static robj *tryObjectSharing(robj *o) {
  *
  * If so, the function returns REDIS_OK and *longval is set to the value
  * of the number. Otherwise REDIS_ERR is returned */
-static int isStringRepresentableAsLong(char *s, long *longval) {
+static int isStringRepresentableAsLong(sds s, long *longval) {
     char buf[32], *endptr;
     long value;
     int slen;
@@ -1947,7 +1947,7 @@ static int isStringRepresentableAsLong(char *s, long *longval) {
 
     /* If the number converted back into a string is not identical
      * then it's not possible to encode the string as integer */
-    if (strlen(buf) != (unsigned)slen || memcmp(buf,s,slen)) return REDIS_ERR;
+    if (sdslen(s) != (unsigned)slen || memcmp(buf,s,slen)) return REDIS_ERR;
     if (longval) *longval = value;
     return REDIS_OK;
 }

test-redis.tcl

@@ -750,19 +750,37 @@ proc main {server port} {
         format $err
     } {ERR*}
 
+    test {MSET base case} {
+        $r mset x 10 y "foo bar" z "x x x x x x x\n\n\r\n"
+        $r mget x y z
+    } [list 10 {foo bar} "x x x x x x x\n\n\r\n"]
+
+    test {MSET wrong number of args} {
+        catch {$r mset x 10 y "foo bar" z} err
+        format $err
+    } {*wrong number*}
+
+    test {MSETNX with already existent key} {
+        list [$r msetnx x1 xxx y2 yyy x 20] [$r exists x1] [$r exists y2]
+    } {0 0 0}
+
+    test {MSETNX with not existing keys} {
+        list [$r msetnx x1 xxx y2 yyy] [$r get x1] [$r get y2]
+    } {1 xxx yyy}
+
     foreach fuzztype {binary alpha compr} {
         test "FUZZ stresser with data model $fuzztype" {
             set err 0
-            for {set i 0} {$i < 1000} {incr i} {
+            for {set i 0} {$i < 10000} {incr i} {
                 set fuzz [randstring 0 512 $fuzztype]
                 $r set foo $fuzz
                 set got [$r get foo]
                 if {$got ne $fuzz} {
-                    incr err
+                    set err [list $fuzz $got]
                     break
                 }
             }
-            format $err
+            set _ $err
         } {0}
     }