I wanted to develop sample framework on OSX with having requirement that at any point in time the framework should be used by only single client, i am not getting how to achieve this ? is their any API's to detect weather the framework is in use? can we use some file related API for this?..i have seen a windows sample where they where detecting the dylib's usage using Following API's ?? CreateFileMappingW MapViewOfFile OpenFileMappingW
Does anyone has come across such scenarios??
You can use lsof command. it will return list of open files.
In the absence of any options, lsof lists all open files belonging to all active processes.
NSTask* task = [[NSTask alloc] init];
NSPipe* pipe = [[NSPipe alloc] init];
NSArray* args = [NSArray arrayWithObjects: @"-c", @"lsof | grep -i some.framework | wc -l",nil];
[task setLaunchPath: @"/bin/sh"];
[task setArguments: args];
[task setStandardOutput: pipe];
[task setStandardError: pipe];
[task setStandardInput: [NSPipe pipe]];
[task launch];
[task waitUntilExit];
NSFileHandle* file = [pipe fileHandleForReading];
NSString* result = [[NSString alloc] initWithData: [file readDataToEndOfFile] encoding: NSASCIIStringEncoding];
NSLog(@"%@",result);
[result release];
[task release];
[pipe release];
