I am trying to make an embedded Linux for a SuperH processor board. I am using the Buildroot 2012.2 toolchain with uClibc.
All compiles fine but when I try to run some of the BusyBox applets (for instance 'ls' or 'mount'), I get an error like this:
ls: : Unknown error 2
For 'ls' in particular it writes this error number-of-files-in-folder times.
Do you have any ideas what might be causing this? No one on the internet seems to have the same problem and I am crawling the configs for several days without luck.
I believe the error might be caused by misconfigured uClibc but it is just my guess.
Thanks.
EDIT:
I enabled several error message options in uClibc and now I get "no such file or directory" error.
I will answer my own question.
The first and most important problem was, that I have over-optimized uClibc so all reasonable error reports were not included. If you are reading this and have same problem, switch error messages on. They are quite small and very useful.
After resolving human readable error reports, I realized, that the putchar function was disabled. Enabling it solved the problem.
To future generation I advise extreme caution, which features of uClibc you decide to disable, unless you want to spend several days finding an unexpected bug.
Related
I'm attempting to try out some modifications in SAP's Privileges.app. Unfortunately, their (understandable) Support policy is
This project is 'as-is' with no support, no changes being made. You are welcome to make changes to improve it but we are not available for questions or support of any kind.
Unfortunately, this app uses two constructs I've never come across before in my professional experience, an XPC service + helper (Launch daemon?) and a DockTile plugin. I'm having a hard time just fundamentally getting the app to work when launched from Xcode - it launches, but it seems that there are issues between (maybe?) sandboxing, signing and perhaps entitlements? I've updated the signing to use my own team, of course, and everything compiles/links/launches properly, but when the XPC service tries to install the helper tool it fails
2022-06-29 17:03:56.284544-0500 PrivilegesXPC[13079:128535] [logging-persist] cannot open file at line 45530 of [9ff244ce07]
2022-06-29 17:03:56.284570-0500 PrivilegesXPC[13079:128535] [logging-persist] os_unix.c:45530: (0) open(/var/db/DetachedSignatures) - Undefined error: 0
2022-06-29 17:04:21.060214-0500 PrivilegesXPC[13079:128537] SAPCorp: ERROR! Failed to connect to helper tool: NSCocoaErrorDomain / 4097
2022-06-29 17:04:31.471555-0500 Privileges[13064:127420] SAPCorp: ERROR! Error Domain=NSPOSIXErrorDomain Code=25 "Inappropriate ioctl for device"
2022-06-29 17:04:45.717751-0500 Privileges[13064:129162] SAPCorp: ERROR! Installation of the helper tool failed: Error Domain=CFErrorDomainLaunchd Code=4 "(null)"
As near as I can tell, the last two errors are thrown from a failure in
success = SMJobBless(
kSMDomainSystemLaunchd,
CFSTR("corp.sap.privileges.helper"),
self->_authRef,
&error
);
but I haven't been able to ascertain why this is failing. Searching for errors around Inappropriate ioctl for device has not been fruitful, unfortunately.
If there's anyone out there with some experience in dealing with apps using some of these more esoteric moving parts that can share some things to try, I'd be much obliged. Bonus points if there's any way to debug code running in a DockTile plugin - as near as I can tell, it's running in SystemUIServer, but I can't attach to that (even as root) from Xcode.
I think I've sorted out getting this running. Here's a few roadblocks I encountered.
SMJobBless has some very particular expectations around code-signing - you'll find references to this in some forum posts and there's a sample project that's also referenced with a utility script - which doesn't run on modern macOS because it's written for Python 2 -- which isn't installed by default anymore and a bit difficult to come by. But, after agonizingly converting Python 2-isms over to Python 3, you'll come to find out that that's not the only thing that's changed, a number of the tools (codesign and otool) don't output the same on ARM64 at which time you'll finally stumble across a kind soul that converted SMJobBless.py ... only to find out that it's not actually needed for this project?! Not sure if it's because the Launch Service is contained in the XPC and not the app, but either way - it seems to not be needed.
If you've run Privileges before, it'll have installed it's escalated helper, which will stand in the way of a local Xcode build copying itself over - which matters because of the aforementioned code signing. You'll need to clear away these artifacts
$ sudo rm -rf /Library/PrivilegedHelperTools/corp.sap.privileges.helper
$ sudo rm /Library/LaunchDaemons/corp.sap.privileges.helper.plist
Just deleting them isn't enough, it seems some sort of runtime launchd state needs to be wiped. It's unclear to me if some incantation of launchctl will clear this out, maybe an invocation of launchctl kickstart -k <foo> or something? I ended up rebooting and that seemed to do the trick anyway.
It seems like you need a particular signing certificate to allow the various signing validations that SMJobBless and the XPC communications are doing to be valid. Particularly, it seems you'll need a Developer ID Application, which happens to match what's encoded in the .xcodeproj pulled down from the GitHub repo. This means you can't enable Automatically manage signing as you won't get this type of certificate (as near as I can tell - please correct me if I'm wrong).
Once you've got all that sorted, since you aren't signing with the SAP developer's certificate, your certificate will have a different unique Team ID, so you'll need to update SMAuthorizedClients and SMPrivilegedExecutables, respectively, (look for 7R5ZEU67FQ and replace with your team ID) in
PrivilegesHelper/PrivilegesHelper-Info.plist
PrivilegesXPC/Info.plist
I think that's basically got it. Hope that helps someone else
We are using OPUS Make in our build infrastructure. (Basically traditional make with some wrappers around I guess)
Our codebase is mostly Java and I have been making changes and building for many months now. No issues.
Suddenly, a couple of days back, when I tried to build,i started seeing this error:
OPUS MAKE: Unknown status. Stop.
I see this error no matter what I try to build. More imp - it looks like it is not even trying to actually compile my code and for some reason just stops before with the above error.
I tried doing a clean build. Even manually cleaned up all old generated build files. Still did not work.
I even tried restarting my environment itself. Restarted Clearcase. Still no use.
I see there is a way to build with debug information. Did that also make -d
However, that did not give any useful info either. Just the same line as above. I was hoping that it would give some debug logs or some error code that I could use to solve the problem.
I see there is an option: make -n. That comes out clean. But from the name, it looks like it does not even attempt to run the build itself.
Please suggest what the issue could be.
thx - Om
"Unknown status" means that a shell command in a target returned a status that make did not understand. Run with -d to see which command is failing. And debug that shell command.
I'm an amateur programmer. I use jGRASP.
I made a lot of functional, running, zero-error programs and copied them to a new computer. Now, when I try to run them, I get that message: "compilation failed but no error lines."
What's going on here? I'd like any help as soon as possible, I have an assignment due.
Do you have the JDK installed (not just JRE)?
What is the compiler output? Any general messages there (not related to your code, but something like a missing javac or javac crashing)?
Is the source code in the correct package structure?
Are the source files in a directory where your login account does not have write access?
I'm experiencing a problem that I could not find a solution for yet.
I use Test Complete to automate some GUI related scenarios for an app. I developed some scripts that were working at some point in the past. After a few months I got back and tried to run one of the scripts. The script failed with the following error while it was executing a ClickCell operation on a grid object.
An error occurred.
Possible reasons:
1. The application stopped responding.
2. The application was compiled incorrectly (see the Open Applications topic in the help system).
3. An error occurred in TestComplete.
Technical information:
379 0x80070057 (The parameter is incorrect.) .
Tested object:
...
I executed the same script on another machine with another Test Complete installation and it worked. So I guess it's not the target app that is the problem.
I checked solutions on the web for this issue, but nothing worked. I cleaned up the temp files in all the locations I could find in this answer. The behavior was the same.
So I guess it might be something related with the Test Complete installation. I tried reinstalling it a few times, but it didn't do the trick.
I then used Dependency Walker (as suggested somewhere on the web) on testcomplete.exe and found that there are some dlls that are missing from the Bin directory of Test Complete. Could they generate this error? If yes, how can I get them? As I said, I already re-installed the app a few times.
Did anyone bump into this while working with Test Complete? Is there any .net temp location that I should clean?
I am starting to develop a new air/html/ajax application today and for some reason my trace() output is not being printed to the console window anymore. Plus, I am also not getting any error messages printed for syntax errors or runtime errors. I tried this on a different machine and there was no problem, so it must have been something wrong with this particular machine. I was thinking it had to do with me using the flex 3 sdk, but removing that from my path variable did not help, neither did reinstalling the air sdk. If anyone has encountered this before, help would be greatly appreciated.
This is not specific to the debugger player. The availability of trace statements in the console from ADL is dependent on whether or not any one of the following settings are turned on in your mm.cfg file:
ErrorReportingEnable
TraceOutputFileEnable
Either one of those will block trace output in the console window - stderr I believe - and instead (in the case of TraceOutputFileEnable) redirect it to a log file.
More information about mm.cfg is available here.
I figured it out. It is because I installed the flash debug player. Now the error messages all go the the log file where the debug player writes to.