On: Finding bugs in Tarsnap

[Flowdalic]

> tarsnap had a signal handler that was reading from a constant array. So what, how could this matter? The standard says thou shalt not.

An references to the standard (I assume he is referring to POSIX) where this is disallowed?

[lokedhs → Flowdalic]

I believe this is in reference to the following quote: http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2...

The relevant quote is:

    the behavior is undefined if the signal handler refers to any object
    other than errno with static storage duration other than by assigning
    a value to an object declared as volatile sig_atomic_t, or if the
    signal handler calls any function defined in this standard other than
    one of the functions listed in the following table.