Re: Launching Terminal Application
Re: Launching Terminal Application
- Subject: Re: Launching Terminal Application
- From: Bryan Blackburn <email@hidden>
- Date: Fri, 29 Nov 2002 22:08:53 -0700
- Mail-followup-to: Cocoa-dev <email@hidden>
If you run top manually just as you are running it here (top ln0) you'll
see it still goes into interactive mode as it's ignoring your argument.
Interactive mode requires a terminal with which top can communicate, and
a pipe isn't one of them, hence the error.
Instead, try
[taskCalledTop setArguments:[NSArray arrayWithObject:@"-l1"]];
to get one sample from top, without requiring a terminal top knows.
Bryan
On Nov 29, 2002 23:49, mw stated:
>
Hey all,
>
>
I based this little bit of "sample code" off of an Apple code example in the
>
dev docs. It is just supposed to load up 'top' from the command-line, and
>
then pipe the output back into the cocoa program and display it in an
>
NSTextView. But it doesn't work. I get an error that says "Error opening
>
terminal: unknown." I have no idea what I am doing wrong. Here is the code.
>
>
#import "AppController.h"
>
#import <Foundation/Foundation.h>
>
>
@implementation AppController
>
>
- (IBAction)runPipe:(id)sender
>
{
>
NSTask *taskCalledTop = [[NSTask alloc] init];
>
NSPipe *readPipeToTop = [NSPipe pipe];
>
NSFileHandle *readHandleToTop = [readPipeToTop fileHandleForReading];
>
NSData *dataFromTop = nil;
>
>
[taskCalledTop setStandardOutput:readPipeToTop];
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[taskCalledTop setLaunchPath:@"/usr/bin/top"];
>
[taskCalledTop setArguments:[NSArray arrayWithObject:@"ln0"]];
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[taskCalledTop launch];
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dataFromTop = [readHandleToTop availableData];
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[self dataToTextView:dataFromTop];
>
>
[taskCalledTop release];
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}
>
>
- (void)dataToTextView:(NSData *)data
>
{
>
[textView insertText:data];
>
}
>
>
@end
>
>
Btw, the error is being shown after the line [taskCalledTop launch] is
>
executed. Any ideas?
>
>
TIA, mw
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