Christian Kauhaus 0c0f068f35 cron: fix crontab(5) and cron job PATH ... Switch off HAVE_SAVED_UIDS since it activates a code path for temporary privilege dropping which does not work on NixOS. Vixie-cron's sources ship with two implementations. Unfortunately, the one activated by HAVE_SAVED_UIDS (using setuid()) does not work on NixOS. Saved UIDs work only if the program which is using them has the setuid bit set on its own executable, not if called from a setuid wrapper (as we do it in NixOS). The other implementation (using setreuid()) works without problems. Quote from <http://stackoverflow.com/questions/8499296/realuid-saved-uid-effective-uid-whats-going-on>: If you're euid is root and you change the uid, the privileges gets dropped permanently.If effective user id is not root then saved user id is never touched and you can regain the root privilege back anytime you want in your program. Also extend the default PATH with NixOS-specific bin directories as vixie-cron's default is not really usable on NixOS. Re #16518 Closes #16522		2016-07-02 00:09:07 +02:00
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