Code updated in the main page.

It works. It finally works. [edit]In every way that I have always wanted it to that is - it obviously worked almost entire before, but now the segfault at early boot issue is solved too, so it fully works as I've wanted ever since I started on this like 2-3 years ago.[/edit] I have one more N900 with a never-touched-R&D-mode-area, on which it needs a tiny bit of testing (to make sure nothing I changed between last year when I fixed that problem and this year when I fixed this one, or nothing that I forgot to clean up, causes any issues there). But I am pretty confident that even as is, it's usable in all of the scenarios it needed to be usable in.

It's frakking awesome. It scans through /proc/self/mounts to check if a /dev/shm is listed in there, and if it is, proceeds. If it reaches the end of file without having found one, it mounts one before proceeding and then unmounts it later when it's done (only if it mounted it prior of course). For academic purposes I still want to know how cal-tool redirects its semaphore placement to /tmp, but I like my way better unless their way is vastly more efficient.

There are is at least one spot where I want to go over the code to A. verify that I didn't mess anything up with the R&D cal area 'virgin' N900s, and B. tweak the actual output that it makes. But I do believe that should work. (expect an edit within 24 hours (probably, who knows with me) to the front post once more, but after that it should stabilize for a while again)

In the long run, there will be refactoring. What people might not realize is this was effectively my first meaningful C program. It has grown along with me over the years (and, quiet poetically, it is the first piece of code where I used a goto (two even); I've always been against the anti-goto dogma, being an efficiency zealot deep down, but I have also always held off on using it until it seemed like it was notably the best option for what I wanted. In a silly, irrational way, I am glad that it was this piece of code that it first came up).

Anyway, I would ultimately like to make the commandline parameter parsing more robust and more informative when something wrong is done. I would also like to make it do a full pass over all of the commandline parameters before beginning to construct the actual string to write into the R&D mode area of CAL, so that it doesn't was time realloc-ing and strcpy-ing all over the place only to reach later commandline flags that negate what the earlier flags specified. (Not that that's a good use of the program anyway so that's the user's fault, but there is a few possible spots where being able to parse the parameters in advance may in theory be useful.

I also need to get around to submitting the bugfix(es?*) to freemangordon's libcal.

*I noticed this before but at the time didn't understand why it might be an issue: Nokia's libcal uses a named semaphore "nokiacal". The open libcal uses a named semaphore "nokiacal3". So far it seems that nothing that uses the cal area on the N900 does so by other means than libcal, but if by some chance some system/program has "nokiacal" as the named semaphore hardcoded into it, and doesn't go through libcal, we could have a problem of concurrent access to the cal area, which is exactly what the semaphores are presumably meant to protect against. Furthermore, just strictly speaking a recode of some system library (or in general any software) doesn't need to make changes to the name of a semaphore that it uses (or in general, anything it uses) unless there are technical reasons why that's an improvement.

P.S. I expect tears will be shed by those reading my code who are non-believers in the goto. The goto will forgive you, and welcome you with open arms when you come to accept the goto wisdom. (What I seriously mean to say is, those who have a problem with where I used goto calls are ultimately welcome to give me a rewritten version that is qualitatively easier to understand, and we can discuss from there. I am not likely to be convinced by just the typical anti-goto mentality though if it's just preachy.)