[launchd-dev] SMJobBless() fails to replace outdated version

[James Foster]

Hi Damien,

Thanks very much. That seems to have done it!

 Some time ago I copied one of the many scripts out there that provides for auto-incrementing the build, and it defaulted to hex. I’ve switched to decimal and that works.

James Foster


> On Jan 27, 2017, at 12:09 PM, Damien Sorresso <dsorresso at apple.com> wrote:
> 
> Hi James,
> 
> "E6" is not a valid CFBundleVersion. CFBundleVersions are very specifically tuples consisting solely of three numeric elements as proscribed in
> 
> https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html#//apple_ref/doc/uid/20001431-102364 <https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html#//apple_ref/doc/uid/20001431-102364>
> 
> The daemon which backs SMJobBless() is strict in this regard. Because the version was invalid, it assumed a version of "0.0.0", and chose not to perform the update.
> -damien
> 
>> On 27 Jan, 2017, at 11:31, James Foster <james.foster at gemtalksystems.com <mailto:james.foster at gemtalksystems.com>> wrote:
>> 
>> According to Damien Sorresso, BSD Engineering, Apple Inc. (see https://lists.macosforge.org/pipermail/launchd-dev/2010-October/000834.html <https://lists.macosforge.org/pipermail/launchd-dev/2010-October/000834.html>), "ServiceManagement will check the CFBundleVersion of the tool and, if it's the same ..., will not overwrite it."
>> 
>> I've updated my code to show the CFBundleVersion of the tool both before and after a "successful" invocation of SMJobBless(). Is there anything I can do to get this to work?
>> 
>> 2017-01-27 09:10... existing: 	<string>84</string>
>> 2017-01-27 09:10... replacement: 	<string>E6</string>
>> 2017-01-27 09:10... SMJobBless(com.GemTalk.GemStone.Helper,...) returned true...
>> 2017-01-27 09:10... now found: 	<string>84</string>
>> 
>>> On Jan 25, 2017, at 4:48 PM, James Foster <james.foster at gemtalksystems.com <mailto:james.foster at gemtalksystems.com>> wrote:
>>> 
>>> I am attempting to replace a helper tool. Most of the time if I increment the version (of my application and of the helper tool) then the new tool will be installed. Sometimes it won't be installed and I have to delete the old one manually. The problem seems to occur about every dozen versions or so, and once it happens the replacement will not occur even if I change the version numbers again.
>>> 
>>> https://developer.apple.com/reference/servicemanagement/1431078-smjobbless?language=objc <https://developer.apple.com/reference/servicemanagement/1431078-smjobbless?language=objc> states "If the job is already installed, success is returned.” 
>>> 
>>> How does SMJobBless() determine that the job is already installed? What do I need to do, beyond creating an entirely new job name, to make it look different enough to replace?
>>> 
>>> Following is my code and console output (from macOS 10.12.2).
>>> 
>>> James Foster
>>> 
>>> 
>>> CODE:
>>> 
>>> - (void)installHelperTool;
>>> {
>>>     OSStatus status = AuthorizationCreate(...);
>>>     // handle errors
>>>     
>>>     NSLog(@"existing: %@", [self system:@"/usr/bin/otool -P "
>>> 	"/Library/PrivilegedHelperTools/com.GemTalk.GemStone.Helper | "
>>> 	"grep -A 1 VersionString | tail -1"]);
>>>     NSLog(@"replacement: %@", [self system:@"/usr/bin/otool -P "
>>> 	"GemStone.app/Contents/Library/LaunchServices/com.GemTalk.GemStone.Helper | "
>>> 	  "grep -A 1 VersionString | tail -1"]);
>>>     CFErrorRef cfError = nil;
>>>     if (SMJobBless(kSMDomainSystemLaunchd, (__bridge CFStringRef)@kHelperIdentifier, authRef, &cfError)) {
>>>         NSLog(@"SMJobBless(%s,...) returned true; attempting (%s).", kHelperIdentifier, kShortVersionString);
>>> 	NSLog(@"now found: %@", [self system:@"/usr/bin/otool -P "
>>> 		 "/Library/PrivilegedHelperTools/com.GemTalk.GemStone.Helper | "
>>> 		"grep -A 1 VersionString | tail -1"]);
>>>     } else {
>>>         AppError(@"Helper tool installation failed: %@", [(__bridge NSError*) cfError localizedDescription]);
>>>     }
>>> }
>>> 
>>> 
>>> CONSOLE:
>>> 
>>> default	14:25:04.368568 -0800	authd	Succeeded authorizing right 'com.apple.ServiceManagement.blesshelper' by client '/Users/jfoster/Library/Developer/Xcode/DerivedData/GemStone-akfvfyaoddyaavgbcxnrdhnovoal/Build/Products/Debug/GemStone.app' [5626] for authorization created by '/Users/jfoster/Library/Developer/Xcode/DerivedData/GemStone-akfvfyaoddyaavgbcxnrdhnovoal/Build/Products/Debug/GemStone.app' [5626] (13,0)
>>> default	14:25:04.889238 -0800	kernel	AMFI: allowing exception handler for 'GemStone' (5626) because the process is not restricted.
>>> default	14:25:04.385444 -0800	GemStone	existing: 	<string>1.3.3.9</string>
>>> default	14:25:04.900905 -0800	kernel	AMFI: allowing exception handler for 'GemStone' (5626) because the process is not restricted.
>>> default	14:25:04.397113 -0800	GemStone	replacement: 	<string>1.4.0</string>
>>> default	14:25:04.398426 -0800	authd	Succeeded authorizing right 'com.apple.ServiceManagement.blesshelper' by client '/usr/libexec/smd' [251] for authorization created by '/Users/jfoster/Library/Developer/Xcode/DerivedData/GemStone-akfvfyaoddyaavgbcxnrdhnovoal/Build/Products/Debug/GemStone.app' [5626] (3,0)
>>> default	14:25:04.408694 -0800	GemStone	SMJobBless(com.GemTalk.GemStone.Helper,...) returned true; attempting (1.4.0).
>>> default	14:25:04.923798 -0800	kernel	AMFI: allowing exception handler for 'GemStone' (5626) because the process is not restricted.
>>> default	14:25:04.419988 -0800	GemStone	now found: 	<string>1.3.3.9</string>
>>> 
>> 
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