Fix parsing of /proc/self/stat

[hevrard]

The code in init_log_file relies on the process name (COMM) to not contain whitespaces. This change fixes it by looking up the right-most parenthesis to safely jump past COMM.

For more context see: https://www.openwall.com/lists/oss-security/2022/12/21/6

[zkabelac]

Hi

Hmm, yeah a bit annoying issue - not really sure it's even worth fixing - the code there is really there only for debugging purposes and has no real use for a standard usage of lvm2 commands.

But will think if there aren't some easier ways how to get the info for test suite purpose.

[teigland]

Just use getpid() and time() or gettimeofday(), and drop /proc/self/stat.

[zkabelac]

So although the code affects purely debugging mode of lvm2 execution I've pushed modified version if this code upstream. Hopefully this will quiet your security warning system.

[hevrard]

Brilliant, thanks!