> FILE *file = popen("sqlite3 test.db .tables","r");
>
> However, I've not been able to read the information from the returned file.

What exactly isn't working? Maybe this helps:

    NSString *fullPathToDatabase = @"/Users/dave/test.db";
    NSTask *sqliteTask = [[NSTask alloc] init];
    NSPipe *readPipe = [NSPipe pipe];

    [sqliteTask setLaunchPath: @"/usr/bin/sqlite3"];
    [sqliteTask setArguments: [NSArray arrayWithObjects:
        fullPathToDatabase, @".tables", nil]];
    [sqliteTask setStandardOutput: readPipe];
    [sqliteTask launch];

    NSLog(@"sqlite wisdom: %@", [[[NSString alloc] initWithData:
        [[readPipe fileHandleForReading] readDataToEndOfFile]
            encoding: NSUTF8StringEncoding] autorelease]);
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