As a convenience, the system operator concatenates its arguments

piaoapiao · Jun 10, 2012 · 806d8f6 · 806d8f6
1 parent 8226890
commit 806d8f6
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/objc/Nu.m b/objc/Nu.m
@@ -8676,7 +8676,12 @@ @interface Nu_system_operator : NuOperator {}
 @implementation Nu_system_operator
 - (id) callWithArguments:(id)cdr context:(NSMutableDictionary *)context
 {
-    id command = [[cdr car] evalWithContext:context];
+    id cursor = cdr;
+    NSMutableString *command = [NSMutableString string];
+    while (cursor && (cursor != [NSNull null])) {
+        [command appendString:[[[cursor car] evalWithContext:context] stringValue]];        
+        cursor = [cursor cdr];
+    }
     const char *commandString = [[command stringValue] cStringUsingEncoding:NSUTF8StringEncoding];
     int result = system(commandString) >> 8;      // this needs an explanation
     return [NSNumber numberWithInt:result];