Make it possible to run cron without a root#574
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CyberDem0n merged 2 commits intomasterfrom Apr 22, 2021
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March 31, 2021 10:59
* Don't set suid bit on /usr/sbin/cron (even if it could be used there
is no way to safely create the root cronjob, but it also means that
sys_nice capability which is set on chrt and renice could be used).
* Use LD_PRELOAD trick for hooking seteuid() and initgroups() functions
when starting cron deamon as non-root.
* Enchance scheduling (or not scheduling) the renice cronjob depending
on the initial conditions (root, sys_nice, no-new-privileges).
* Disable unwanted cronjobs (/etc/crontab, /etc/cron.{hourly,daily,...})
Close: #562
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/usr/sbin/cron(even if it could be used there is no way to safely create the root cronjob, but it also means that thesys_nicecapability which is set onchrtandrenicecould be used).LD_PRELOADtrick for hookingseteuid()andinitgroups()functions when starting cron deamon without a root./etc/crontab,/etc/cron.{hourly,daily,...}), they produce "scary" logs when cron is running without a root.Close: #562