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Re: chroot'ed environment?
From: don () paranoia com (don () paranoia com)
Date: Thu, 20 Apr 1995 03:32:16 -0500 (CDT)
Excerpted from 'man 3 openlog' on an AIX 3.2.5 system, but it should be
in any BSD4.3 system:
int openlog (ID, LogOption, Facility)
int LogOption, Facility;
LogOption Specifies a bit field that indicates logging options.
The values of LogOption are:
LOG_NDELAY Opens the connection to the syslogd command immediate-
ly, instead of when the first message is logged. This option is
useful for programs that need to manage the order in which file
descriptors are allocated.
So if you call openlog(argv,LOG_NDELAY,LOG_DAEMON); the LOG_NDELAY
will open /dev/log *now* (presumably before you chroot()). And as we all
know, open file descriptors are not affected by a chroot()....
Computer Systems Engineer
Come to think of it, 'sfingerd' (ftp://hplyot.obspm.fr/net/sfingerd*.tar.gz)
uses this technique, and has been running here at paranoia.com for a while
now, I believe. Works quite well.
Michael E. Glasgow -- don () paranoia com