Thomas Viehmann wrote: > Andreas Tille wrote: >> 2. Make the temp file save against symlink attacks. The question >> I have for this case which should probably be prefered is: How >> can I savely teach an independent script about the PIDs of a >> crashed program that should be stopped. I think random file names >> will not really work here or do I miss something? > How about using mkstemp with a prefix containing the pid (i.e. template > foo_$PID_XXXXXX) and have other programs discard the random part. The > main thing here is that he file must be created in a way that ensures > the file to be created does not exist, not that it must not contain a > pattern.
Oh, and if you really care, be sure that it's a regular file (not a symlink pointing to something) owned by yourself before using it as a hint to kill your processes. Kind regards T. -- Thomas Viehmann, http://thomas.viehmann.net/ -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
