From: Andre Noll <maan@tuebingen.mpg.de>
Date: Fri, 17 Feb 2017 14:29:52 +0000 (+0100)
Subject: ipc.c: Use ftok() instead of SuperFastHash.
X-Git-Tag: v1.0.0~30
X-Git-Url: http://git.tuebingen.mpg.de/?p=dss.git;a=commitdiff_plain;h=c92370affe722f38a85a41d1b5524e4a102b8f4d;hp=c92370affe722f38a85a41d1b5524e4a102b8f4d

ipc.c: Use ftok() instead of SuperFastHash.

ftok(3) uses the identity of the named file to generate a key_t type
System V IPC key, which is easier than computing the key by hashing
the (resolved) pathname of the config file. This change allows to
get rid of the realpath() and the super_fast_hash() implementation.

If ftok(3) fails, presumably because the underlying call to stat(2)
fails, we now simply return a phony identifier, similar to what we did
before in this case. This eliminates the only possible failure path
in get_key_or_die(), so this function is renamed to get_key().
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