pgaskin / nickelhook Goto Github PK

The failsafe works perfectly fine right now, but there's room for improvement. It would also be nice to be able to use the failsafe at times other than just startup.

I'm thinking of having an API like:

• nh_failsafe_t *nh_failsafe_create(const char *fn, const char *fn_temp) - creates a new failsafe for the specified file
• nh_failsafe_t *nh_failsafe_global() - returns or creates the global instance
• nh_failsafe_claim_t nh_failsafe_claim(nh_failsafe_t*, int timeout) - creates a claim with an optional timeout, activates the failsafe if it isn't active, and extends the it to remain active while the claim exists
• void nh_failsafe_release(nh_failsafe_t*, nh_failsafe_claim_t, int delay) - releases a claim after an optional delay
• void nh_failsafe_trigger(nh_failsafe_t*) - triggers the failsafe (works even when there aren't any claims)
• void nh_failsafe_uninstall(nh_failsafe_t*) - deletes the temporary file
• NH_FAILSAFE(failsafe, timeout, delay) - macro to create a claim and use the GCC cleanup attribute to release it when it goes out of scope

I noticed your little note regarding a versioning mechanism. Is it too early to discuss this? 😀

One option is to do something similar to what I prototyped in NDB. Another potential option might be some sort of external version file(s).

Ideally, a mod should be able to be included in a KoboRoot.tgz without fear of clobbering a newer version that is already installed.

Hi,

I have been struggling with this for a few days now - and I'm sure it's something trivial I am doing wrong, but I am frustrated.

I am having difficulties setting things up. I can correctly combine, and I can correctly edit the preload to get the library to load.

When I do I get the following error:

fatal: dlopen libnickel: libQtSolutions_IOCompressor-2.3.so.1: cannot open shared object file: No such file or directory

I can get past this by opening the files it throws for before the lib nickel is opened.

dlopen("/usr/local/Kobo/libQtSolutions_IOCompressor-2.3.so.1", RTLD_LAZY|RTLD_NODELETE);
dlopen("/usr/local/Kobo/libsunpinyin.so.3", RTLD_LAZY|RTLD_NODELETE);
dlopen("/usr/local/Kobo/librmsdk.so.1", RTLD_LAZY|RTLD_NODELETE);

It seems to then load, it informs me that the symbol has been replaced.

However, it seems to just keep loading itself over and over.

All I am currently doing is printing, and then returning the original implementation. Absolutely nothing is printed. I originally thought this might be a null or something similar, but I'd expect it to log before this happens.

https://gist.github.com/Podginator/8bb19abf009673abc8eb1cf9f19afe05

I am probably doing something wrong, but I have had similar issues trying to load the examples in kobo_mods, and NickelClock.

Any help is greatly appreciated.