[RedWolf890]

Hello,
Part of the app I'm writing is basically the commandline with an aqua makeover. However, system() function isn't behaving like I would expect. The code given at the bottom is the for the command action, which is whenever someone presses enter from the command field or presses the Send button in the gui. However, when I type "w" (then Send) and then "vim" (then Send) the following errors are reported. I get these same errors no matter

[Session started at 2005-05-28 19:24:39 -0500.]
sh: line 1: \240\364: command not found
sh: line 1: \240\364: command not found

I know all my outlets, buttons and actions are all properly connected. I am also having a problem with outputting to the NSTextView object called resultTextView. For instance, the code seems like it should output "TEST" every time a command is given, but instead it does nothing.

- (IBAction)command: (id)sender
{
NSString *cmd = [[NSString alloc] init];
NSMutableString *result = [[NSMutableString alloc] init];
cmd = [commandField stringValue];
system((char *)cmd);
[result setString:@"TEST"];
[resultTextView insertText:result];
}

Sorry if this is really amateur...I tried looking stuff up on the apple website and other posts, but it didn't help all that much. I figured I'd get some people's input. Thanks!

[Wevah]

cmd is a pointer to an NSString, not a buffer. You need to be using something like system([cmd UTF8String]); .

You should also be releasing cmd and result before the end of the method, since they're not autoreleased and you're not storing their pointers anywhere visible outside of the method's scope.

[Chuckit]

The inital assignment of cmd to [[NSString alloc] init] is also a memory leak, since you immediately turn around and assign it to [commandField stringValue] without ever releasing that initial blank string. Just make it NSString *cmd = [commandField stringValue].

Also, just to offer more detail on why it isn't working: You can't cast objects to different types in Objective-C. The variables you use to refer to objects are all pointers (e.g. NSString*), so casting it to another type (e.g. char*) just fools the compiler without actually performing any sort of conversion. In order to convert an object, you should call the appropriate method (e.g. [myString UTF8String]).

[Angus_D]

And you should probably be using NSTask, anyway. system() is horrible.