70 lines
2.6 KiB
Text
70 lines
2.6 KiB
Text
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This is just syslogd and the test programs now. syslog() is in libc 4.2
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syslogd has been changed to use /proc/kmsg for kernel messages. It also
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avoids making any terminal it opens its controlling terminal. Otherwise
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we have a dodgy race condition between processes connecting to terminals
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which can result in the terminal having the wrong group at the wrong time.
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The syslog() in libc 4.2 needs changing to use O_NOCTTY on its opens as
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well.
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Mike Jagdis Internet: jaggy@purplet.demon.co.uk
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FidoNet: Mike Jagdis, 2:252/305
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---------------------------------------------------------------------------
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Syslogd and Syslog.o
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These are the syslogd and syslog ported from 4.3BSD (that's the new one with
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the *very* flexible config file).
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Syslogd is essentially unchanged from the 4.3BSD, with the exception that
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*nothing* is ever logged to the console (BAD thing to do on a UNIXpc). You
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can configure it (via /etc/syslog.conf) to log messages in different
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logfiles (depending upon the sender's facility code and the priority), log
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to users' terminals (same dependancies), and if things get real bad, it can
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do a wall (write-all; same dependancies).
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Syslog is really only modified in that it uses UDP datagrams because I had
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no luck at all using UNIX domain sockets on the 3B1. See syslog.h for
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facility codes and priorities that can be used.
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BUGS:
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Messages from facilities LOG_KERN, LOG_USER, and LOG_PRT never can be
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wall-ed, no matter how high the priority. I'm still trying to decide if
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this is a bug or a feature. :-)
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ALSO INCLUDED:
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Syslog_test, sendlog (to use from shell scripts) and logger (for use in
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shell script also).
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NEEDED:
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The resolver routines in libresolv.a are not needed, but allow you to log to
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hosts not present in /etc/hosts and to accept logging from same.
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-----------------------------------------------------------------------
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Fixed up UNIX domain socket code, added Linux specific code to read messages
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from the kernel.
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The #ifdefs are now :-
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SYSLOG_INET listen on a UDP socket (syslogd)
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log via UDP (syslog library call)
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SYSLOG_UNIXAF listen on a UNIX domain socker (syslogd)
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log via UNIX domain (syslogd library)
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SYSLOG_KERNEL fork a second copy to read kernel messages using
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syslog system call.
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syslogd should be built with one or more of these flags, libsyslog.a should
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be built with SYSLOG_INET or SYSLOG_UNIXAF, SYSLOG_INET is used in preference
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to SYSLOG_UNIXAF.
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readlog is a program which reads from the kernel and records the messages
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it finds in syslogd via the normal library call interface, it can be run
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instead of building syslogd with SYSLOG_KERNEL.
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