Update: I *finally* got a bead on this.
The user running my main application has parental controls enabled. The user is
allowed to run the main application, and can, but the helper task that is
bundled inside the main application's bundle is not allowed to run. When the
*task* launches, *it* crashes, but since it happens *while* fork/exec'ing, the
crash *appears* to be main application crashing, but it's not.
When the task launches, the user is shown a dialog by the OS: "You don't have
permission to use the application "mytask."" There are options to Always allow,
allow once, and just ignore and move on. Allowing once, and even "Always allow"
always results in the same message, and the task crashing. The permissions do
not stick at all, probably because it's bundled inside the main .app package's
Resource folder?
Any ideas what to do?
--
Seth Willits
On Feb 4, 2013, at 11:26 AM, Seth Willits wrote:
>
> In my app I have to launch background processes (bundled within my app's
> Resources folder) to do some things, and I launch them with NSTask. Every now
> and then I get a crash report which shows NSTask throws some fatal exception
> which is not caught by a wrapping @try block.
>
>
> For example:
>
>
>
> @try {
> NSString * taskPath = [[[NSBundle mainBundle] resourcePath]
> stringByAppendingPathComponent:@"mytask"];
> task = [[NSTask alloc] init];
> task.launchPath = taskPath;
> task.arguments = @[aUUIDString];
> [task launch];
> }
> @catch (NSException * e) {
> ...
> }
>
>
>
> And it crashes:
>
>
> Exception Type: EXC_BREAKPOINT (SIGTRAP)
> Exception Codes: 0x0000000000000002, 0x0000000000000000
>
> *** NSTask: Task create for path
> '/Applications/App.app/Contents/Resources/mytask' failed: 22, "Invalid
> argument". Terminating temporary process.
> *** multi-threaded process forked ***
>
> Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
> 0 com.apple.Foundation 0x978142d8
> ___NEW_PROCESS_COULD_NOT_BE_EXECD___ + 7
> 1 com.apple.Foundation 0x976d2e16 -[NSConcreteTask
> launchWithDictionary:] + 4698
> 2 com.apple.Foundation 0x97744447 -[NSConcreteTask launch] + 40
>
>
--
Seth Willits
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