Finder icon not in sync with file when locking / unlocking

Subject: Finder icon not in sync with file when locking / unlocking

From: Joakim Nyström <email@hidden>

Date: Thu, 15 Dec 2005 17:36:54 +0100

Delivered-to: email@hidden

From what I understand, since 10.4 Finder uses the kqueue mechanism to keep the graphics in sync with files on disk. This works very well most of the time but I have encountered circumstances where it is not working.

What I try to do is to lock and thereafter unlock a file. In my particular case I end up with a file which is unlocked but where the icon have a lock symbol in the lower left corner. Below is the source code for a simple command-line utility which reproduces the bug. (The call to sleep() is needed for the bug to occur and is put there to simulate some work.)

Has anyone had a similar problem? What are the best (i.e. simplest) work-arounds?

/ Joakim Nyström

#include <iostream>

#include <sys/stat.h>

#include <errno.h>

#include <fcntl.h>

int main(int argc, char* argv[]) {

int result = 0;

if (argc != 2) {

std::cerr << "Exactely one filename must be specified" << std::endl;

exit(1);

}

std::cout << "Creating file '" << argv[1] << "'" << std::endl;

int fd = ::open(argv[1], O_CREAT);

if (fd == -1) {

std::cerr << "open failed" << std::endl;

exit(2);

}

::close(fd);

//::sleep(10);

// lock

std::cout << "locking file" << std::endl;

result = ::chflags(argv[1], UF_IMMUTABLE);

if (result != 0) {

std::cerr << "chflags failed (" << errno << ")" << std::endl;

exit(3);

}

::sleep(1);

//unlock

std::cout << "unlocking file" << std::endl;

result = ::chflags(argv[1], 0);

if (result != 0) {

std::cerr << "chflags failed (" << errno << ")" << std::endl;

exit(4);

}

return 0;

}

(I have also reported this to radar as #4380992)

Joakim Nyström

Developer

Propellerhead Software

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