December 2006 - Darwin-dev - lists.apple.com

Remapping MacBook Pro eject key
by Andre-John Mas 03 Dec '06

03 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, Andre _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Every so often I will catch the eject key on my MacBook Pro. I have looked around for existing solutions, but I haven't found anything to date. Does anyone know whether this is something that is doable, or is hit hardwired to the DVD drive? This email sent to site_archiver(a)lists.apple.com

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Re: DiskArbitration crash after DADiskMountApprovalCallback exits
by Jeff Johnson 02 Dec '06

02 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Dec 1, 2006, at 11:09 PM, stephen joseph butler wrote: 2006/12/1, Jeff Johnson <publicposting(a)lapcatsoftware.com>: #0 0x90a55387 in objc_msgSend () #1 0x0d2358f0 in ?? () #2 0x9082205c in __CFDictionaryDeallocate () #3 0x9080b1a9 in _CFRelease () #4 0x913fc6f2 in _DADiskSetDescription () #5 0x913fc0cc in _DADispatchCallback () #6 0x913fbc3f in _DASessionCallback () [...] The essence of my DADiskMountApprovalCallback is the following: CFDictionaryRef description = DADiskCopyDescription(disk); if (description) { // Check kDADiskDescriptionVolumeNameKey and kDADiskDescriptionVolumeUUIDKey for relevant values. CFRelease(description); Looking at the backtrace, the error could be coming whlie the dictionary tries to release its keys/values. Is your code possibly releasing something it gets from the dictionary when it shouldn't be? Stephen, -Jeff _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… You are correct. I was doing that with the UUID. It was happening in another function, and I don't do much CF programming anyway, so it was easy for me to overlook. Sorry! Thanks a lot for the help. (I still think it's odd, though, that DADiskCopyDescription() doesn't copy the description.) This email sent to site_archiver(a)lists.apple.com

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Re: statfs and 64bit file lengths?
by Steve Checkoway 02 Dec '06

02 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Dec 1, 2006, at 2:37 PM, jmzorko(a)mac.com wrote: [dualg5:~/temp] steve$ cat statfs.c #include <sys/param.h> #include <sys/mount.h> #include <stdio.h> int main() { struct statfs fs; statfs( "/", &fs ); printf( "%ld, %ld, %lld\n", fs.f_bsize, fs.f_bfree, (int64_t)fs.f_bsize*fs.f_bfree ); return 0; } [dualg5:~/temp] steve$ gcc -Wall statfs.c [dualg5:~/temp] steve$ ./a.out 4096, 16022995, 65630187520 -- Steve Checkoway _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com How do I determine the amount of free disk on a volume on OSX 10.4.x? The *nix statfs() API seems limited to 32bit file lengths, unless i'm misunderstanding something. Can someone send me a quick example of how to do this? smime.p7s

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Re: DiskArbitration crash after DADiskMountApprovalCallback exits
by stephen joseph butler 02 Dec '06

02 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=FMrxrjfdwYpmJyMUIT4FEu0e2PiePRFdxWGIUiLzTJn/0YTuOhiVMoZBAi0rJa+yF0N+CVIrX7xYLV1ep/YrJ0D/bZWQah3AZIWwl3KwDCdh10e6ui5XvE/1NYa+ndTpSDp158F35Rvv+4lGOD+5ENyNzusDFfqNxJgF4oS4/Ho= #0 0x90a55387 in objc_msgSend () #1 0x0d2358f0 in ?? () #2 0x9082205c in __CFDictionaryDeallocate () #3 0x9080b1a9 in _CFRelease () #4 0x913fc6f2 in _DADiskSetDescription () #5 0x913fc0cc in _DADispatchCallback () #6 0x913fbc3f in _DASessionCallback () [...] The essence of my DADiskMountApprovalCallback is the following: CFDictionaryRef description = DADiskCopyDescription(disk); if (description) { // Check kDADiskDescriptionVolumeNameKey and kDADiskDescriptionVolumeUUIDKey for relevant values. CFRelease(description); Looking at the backtrace, the error could be coming whlie the dictionary tries to release its keys/values. Is your code possibly releasing something it gets from the dictionary when it shouldn't be? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… 2006/12/1, Jeff Johnson <publicposting(a)lapcatsoftware.com>: This email sent to site_archiver(a)lists.apple.com

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Re: Bus Error with getch?
by Andre-John Mas 02 Dec '06

02 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Right you are, this works now. Thanks. On 2-Dec-06, at 00:02 , R. Matthew Emerson wrote: On Dec 1, 2006, at 11:49 PM, Andre-John Mas wrote: #include <curses.h> int main ( int argc, char **argv ) { getch(); return 0; } and compiling with -Wall: cc getch2.c -Wall -lcurses You have to call initscr() before you can call other curses functions. You might want to review ncurses(3). _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… gives me no warnings and yet it still crashes. Commenting out getch () the program no longer crashes. This email sent to site_archiver(a)lists.apple.com

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Re: Bus Error with getch?
by R. Matthew Emerson 02 Dec '06

02 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Dec 1, 2006, at 11:49 PM, Andre-John Mas wrote: #include <curses.h> int main ( int argc, char **argv ) { getch(); return 0; } and compiling with -Wall: cc getch2.c -Wall -lcurses You have to call initscr() before you can call other curses functions. You might want to review ncurses(3). _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… gives me no warnings and yet it still crashes. Commenting out getch () the program no longer crashes. This email sent to site_archiver(a)lists.apple.com

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Re: Bus Error with getch?
by Eric Albert 02 Dec '06

02 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Dec 1, 2006, at 8:49 PM, Andre-John Mas wrote: On 1-Dec-06, at 23:06 , Eric Albert wrote: On Dec 1, 2006, at 6:42 PM, Andre-John Mas wrote: int main ( int argc, char *argv ) { int c = getch(); //printf( "%c", c ); } I compiling it with the following command line: cc getch.c -lcurses Changing the code to: #include <curses.h> int main ( int argc, char **argv ) { getch(); return 0; } and compiling with -Wall: cc getch2.c -Wall -lcurses Hope this helps, Eric _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I am getting a Bus Error with this very simple application, on my MacBook Pro: Is this me or libcurses in cause? main is declared as returning an int and you aren't returning anything. Try adding 'return 0;'. I'd suggest compiling your code with warnings on, ideally via - Wall. That'll catch things like this. gives me no warnings and yet it still crashes. Commenting out getch () the program no longer crashes. Just curious as to whether this works for you? I am trying this on MacOS X 10.4.8 A bit of Googling shows that you have to call initscr() before using any curses APIs. That fixes this. This email sent to site_archiver(a)lists.apple.com

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Re: Bus Error with getch?
by Andre-John Mas 02 Dec '06

02 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 1-Dec-06, at 23:06 , Eric Albert wrote: On Dec 1, 2006, at 6:42 PM, Andre-John Mas wrote: int main ( int argc, char *argv ) { int c = getch(); //printf( "%c", c ); } I compiling it with the following command line: cc getch.c -lcurses Changing the code to: #include <curses.h> int main ( int argc, char **argv ) { getch(); return 0; } and compiling with -Wall: cc getch2.c -Wall -lcurses Andre _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I am getting a Bus Error with this very simple application, on my MacBook Pro: Is this me or libcurses in cause? main is declared as returning an int and you aren't returning anything. Try adding 'return 0;'. I'd suggest compiling your code with warnings on, ideally via - Wall. That'll catch things like this. gives me no warnings and yet it still crashes. Commenting out getch() the program no longer crashes. Just curious as to whether this works for you? I am trying this on MacOS X 10.4.8 This email sent to site_archiver(a)lists.apple.com

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DiskArbitration crash after DADiskMountApprovalCallback exits
by Jeff Johnson 02 Dec '06

02 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com The essence of my DADiskMountApprovalCallback is the following: I would be very grateful for any help on this matter. Thanks! -Jeff Johnson _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I'm having trouble with my app crashing after my DADiskMountApprovalCallback gets called. In this case, the callback is the result of my app erasing a disk volume. The callback function successfully exits, so the crash is not happening in my app's code. Here's the backtrace: #0 0x90a55387 in objc_msgSend () #1 0x0d2358f0 in ?? () #2 0x9082205c in __CFDictionaryDeallocate () #3 0x9080b1a9 in _CFRelease () #4 0x913fc6f2 in _DADiskSetDescription () #5 0x913fc0cc in _DADispatchCallback () #6 0x913fbc3f in _DASessionCallback () #7 0x9083a3c5 in __CFMachPortPerform () #8 0x9082a66d in CFRunLoopRunSpecific () #9 0x90829b0e in CFRunLoopRunInMode () #10 0x92dc9bef in RunCurrentEventLoopInMode () #11 0x92dc92fd in ReceiveNextEventCommon () #12 0x92dc9154 in BlockUntilNextEventMatchingListInMode () #13 0x9326e465 in _DPSNextEvent () #14 0x9326e056 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] () #15 0x93267ddb in -[NSApplication run] () #16 0x9325bd2f in NSApplicationMain () #17 0x00002cde in main (argc=1, argv=0xbffff9dc) CFDictionaryRef description = DADiskCopyDescription(disk); if (description) { // Check kDADiskDescriptionVolumeNameKey and kDADiskDescriptionVolumeUUIDKey for relevant values. CFRelease(description); I suspect that ultimately the problem is connected to the fact that DADiskCopyDescription() does not necessarily create a new copy of the description but does a CFRetain(), as one can see in the file DADisc.c in the source code for DiskArbitration. I also wonder whether there is an issue with timeouts on the callbacks, because if I streamline the function by removing all code except the DADiskCopyDescription() and CFRelease(), the crash doesn't occur. With the non-streamlined function, I'm seeing log messages from disarbitrationd that my app is not responding. It doesn't appear that my code is over-releasing the description, because I checked that the retain count for the disk description is 2 immediately after DADiskCopyDescription(disk) and immediately before CFRelease(description). The retain count is 1 immediately before my function returns. If I comment out the CFRelease line, however, the crash does not occur, and for some reason the same volume triggers my callback three times. (Each time I return a DADissenterRef with the status kDAReturnNotPermitted.) This email sent to site_archiver(a)lists.apple.com

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Re: Bus Error with getch?
by Eric Albert 02 Dec '06

02 Dec '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Dec 1, 2006, at 6:42 PM, Andre-John Mas wrote: int main ( int argc, char *argv ) { int c = getch(); //printf( "%c", c ); } I compiling it with the following command line: cc getch.c -lcurses Hope this helps, Eric _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I am getting a Bus Error with this very simple application, on my MacBook Pro: Is this me or libcurses in cause? main is declared as returning an int and you aren't returning anything. Try adding 'return 0;'. I'd suggest compiling your code with warnings on, ideally via -Wall. That'll catch things like this. This email sent to site_archiver(a)lists.apple.com

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