Databases
StackOverflow2013
Postsdbo
POExecute terminal command top from a Cocoa app
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POExecute terminal command top from a Cocoa app
    primarykey
    data
    text
    <p>I want to execute top and get the result in order to know how much memory is used by a process.</p> <p>First, I want to execute a terminal command. I use code from this question <a href="https://stackoverflow.com/questions/412562/execute-a-terminal-command-from-a-cocoa-app/696942#696942">Execute a terminal command from a Cocoa app</a></p> <p>I tried with uptime and it worked flawlessly. </p> <p>But, when I tried to use top instead of uptime, i get the following error:</p> <p><strong>Error opening terminal: unknown.</strong></p> <p>Or, top is in /usr/bin/top, I don't know why it refuses to use it.</p> <p>Here is my code:</p> <pre><code> NSTask *task; task = [[NSTask alloc] init]; [task setLaunchPath: @"/usr/bin/top"]; /*NSArray *arguments; arguments = [NSArray arrayWithObjects: @"foo", @"bar.txt", nil]; [task setArguments: arguments];*/ NSPipe *pipe; pipe = [NSPipe pipe]; [task setStandardOutput: pipe]; NSFileHandle *file; file = [pipe fileHandleForReading]; [task launch]; NSData *data; data = [file readDataToEndOfFile]; NSString *string; string = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding]; [label setStringValue: string]; [string release]; [task release]; </code></pre> <p>Second question: the thing I am trying to do is to know how much memory is used by Google Chrome. Because it uses a process for each tab, it's difficult to know how much memeroy in total it uses.</p> <p>Problem 1: top changes its value every second, how can I get a value? Problem 2: how can I search in the result of top in order to find only the processes I want (given that I know their names).</p> <p>Thanks.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USCommunity
    1. USN..
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload