Cannot start session in PHP on ARM

Question

I have PHP installed on ARM91. It works fine until I use session_start. Then I get the following Warning: session_start(): read returned less bytes than requested This does not seem to be a permission problem - the sess_* files are created. When you try to put anything into such session, it creates sparse file (17GB size) for the session with real size 12 bytes (exactly what i wanted to write there). Doing strace I think the problem is somewhere in __llseek that cause creation of such huge sparse file. I have similar issue with SQLITE (cannot open any DB, disk I/O error but i can cat the DB file and also seems it's llseek issue when creating DB journal file). I have no idea where to look further or how to solve that, fail to google any similar reports.

Answer 1

This sounds like something worthy of reporting to the PHP bug tracker.

If nothing comes up that helps, you could roll your own session storage functions using session_save_handler(). If you check out the manual page, there is an example for a complete alternative rewrite of the file based session handler.

Answer 2

Seems it was issue of incompatible uclibc. After recompiling everything with carefully reviewed settings it started to work.