On Thu, 2006-02-16 at 20:01 +0100, leo2@xxxxxxxxxxxxxx wrote: > The current function to activate core-dumps for vdr running setuid ist only > working for kernel > 2.6.13 ( says the comment in vdr.c ). > Actualy it is not working for 2.4.21 but it was easy an easy change, just > replace > prctl(PR_SET_DUMPABLE, 2, 0, 0, 0) > with > prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) > > If you need the switch with "2" ( what does "2" mean for >2.6.13 ??) It's "2" intentionally. "1" is a "no security" mode, "2" makes the core dumps readable by root only and applies additional checks. Like the comment says, "2" is available in kernels >= 2.6.13 only. For more info, see eg. the suid_dumpable description here: http://marc.theaimsgroup.com/?l=linux-kernel&m=109647550421014&w=2 Yes, the net effect is that the unmodified VDR 1.3.42 won't produce core dumps at all when not running as root with < 2.6.13 kernels, but IMO that's a reasonable tradeoff, at least as far as the default is concerned.
