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authorRainer Gerhards <rgerhards@adiscon.com>2007-07-10 16:12:46 +0000
committerRainer Gerhards <rgerhards@adiscon.com>2007-07-10 16:12:46 +0000
commit33c28c8d7ada38372fbf7aa414337b4be9377bd8 (patch)
tree4b0f7322c2c8999d01b96abe950bc4080333feb8 /NEWS
parentcff4955448a2895a7e1fad8106f5dd1b9a0bfbe7 (diff)
downloadrsyslog-33c28c8d7ada38372fbf7aa414337b4be9377bd8.tar.gz
rsyslog-33c28c8d7ada38372fbf7aa414337b4be9377bd8.tar.xz
rsyslog-33c28c8d7ada38372fbf7aa414337b4be9377bd8.zip
upgrading to autotools build system - thank Peter Vrabec for patches and
the idea
Diffstat (limited to 'NEWS')
-rw-r--r--NEWS954
1 files changed, 1 insertions, 953 deletions
diff --git a/NEWS b/NEWS
index f9c9a968..1b14f65e 100644
--- a/NEWS
+++ b/NEWS
@@ -1,953 +1 @@
----------------------------------------------------------------------------
-Version 1.15.1 (RGer), 2007-07-10
-- fixed a bug that caused a dynaFile selector to stall when there was
- an open error with one file
-- improved template processing for dynaFiles; templates are now only
- looked up during initialization - speeds up processing
-- optimized memory layout in struct filed when compiled with MySQL
- support
-- fixed a bug that caused compilation without SYSLOG_INET to fail
-- re-enabled the "last message repeated n times" feature. This
- feature was not taken care of while rsyslogd evolved from sysklogd
- and it was more or less defunct. Now it is fully functional again.
-- added system properties: $NOW, $YEAR, $MONTH, $DAY, $HOUR, $MINUTE
-- fixed a bug in iovAsString() that caused a memory leak under stress
- conditions (most probably memory shortage). This was unlikely to
- ever happen, but it doesn't hurt doing it right
-- cosmetic: defined type "uchar", change all unsigned chars to uchar
----------------------------------------------------------------------------
-Version 1.15.0 (RGer), 2007-07-05
-- added ability to dynamically generate file names based on templates
- and thus properties. This was a much-requested feature. It makes
- life easy when it e.g. comes to splitting files based on the sender
- address.
-- added $umask and $FileCreateMode config file directives
-- applied a patch from Bartosz Kuzma to compile cleanly under NetBSD
-- checks for extra (unexpected) characters in system config file lines
- have been added
-- added IPv6 documentation - was accidently missing from CVS
-- begun to change char to unsigned char
----------------------------------------------------------------------------
-Version 1.14.2 (RGer), 2007-07-03
-** this release fixes all known nits with IPv6 **
-- restored capability to do /etc/service lookup for "syslog"
- service when -r 0 was given
-- documented IPv6 handling of syslog messages
-- integrate patch from Bartosz Ku┼║ma to make rsyslog compile under
- Solaris again (the patch replaced a strndup() call, which is not
- available under Solaris
-- improved debug logging when waiting on select
-- updated rsyslogd man page with new options (-46A)
----------------------------------------------------------------------------
-Version 1.14.1 (RGer/Peter Vrabec), 2007-06-29
-- added Peter Vrabec's patch for IPv6 TCP
-- prefixed all messages send to stderr in rsyslogd with "rsyslogd: "
----------------------------------------------------------------------------
-Version 1.14.0 (RGer/Peter Vrabec), 2007-06-28
-- Peter Vrabec provided IPv6 for rsyslog, so we are now IPv6 enabled
- IPv6 Support is currently for UDP only, TCP is to come soon.
- AllowedSender configuration does not yet work for IPv6.
-- fixed code in iovCreate() that broke C's strict aliasing rules
-- fixed some char/unsigned char differences that forced the compiler
- to spit out warning messages
-- updated the Red Hat init script to fix a known issue (thanks to
- Peter Vrabec)
----------------------------------------------------------------------------
-Version 1.13.5 (RGer), 2007-06-22
-- made the TCP session limit configurable via command line switch
- now -t <port>,<max sessions>
-- added man page for rklogd(8) (basically a copy from klogd, but now
- there is one...)
-- fixed a bug that caused internal messages (e.g. rsyslogd startup) to
- appear without a tag.
-- removed a minor memory leak that occurred when TAG processing requalified
- a HOSTNAME to be a TAG (and a TAG already was set).
-- removed potential small memory leaks in MsgSet***() functions. There
- would be a leak if a property was re-set, something that happened
- extremely seldom.
----------------------------------------------------------------------------
-Version 1.13.4 (RGer), 2007-06-18
-- added a new property "PRI-text", which holds the PRI field in
- textual form (e.g. "syslog.info")
-- added alias "syslogseverity" for "syslogpriority", which is a
- misleading property name that needs to stay for historical
- reasons (and backward-compatility)
-- added doc on how to record PRI value in log file
-- enhanced signal handling in klogd, including removal of an unsafe
- call to the logging system during signal handling
----------------------------------------------------------------------------
-Version 1.13.3 (RGer), 2007-06-15
-- create a version of syslog.c from scratch. This is now
- - highly optimized for rsyslog
- - removes an incompatible license problem as the original
- version had a BSD license with advertising clause
- - fixed in the regard that rklogd will continue to work when
- rsysogd has been restarted (the original version, as well
- as sysklogd, will remain silent then)
- - solved an issue with an extra NUL char at message end that the
- original version had
-- applied some changes to klogd to care for the new interface
-- fixed a bug in syslogd.c which prevented compiling under debian
----------------------------------------------------------------------------
-Version 1.13.2 (RGer), 2007-06-13
-- lib order in makefile patched to facilitate static linking - thanks
- to Bennett Todd for providing the patch
-- Integrated a patch from Peter Vrabec (pvrabec@redheat.com):
- - added klogd under the name of rklogd (remove dependency on
- original sysklogd package
- - createDB.sql now in UTF
- - added additional config files for use on Red Hat
----------------------------------------------------------------------------
-Version 1.13.1 (RGer), 2007-02-05
-- changed the listen backlog limit to a more reasonable value based on
- the maximum number of TCP connections configurd (10% + 5) - thanks to Guy
- Standen for the hint (actually, the limit was 5 and that was a
- left-over from early testing).
-- fixed a bug in makefile which caused DB-support to be disabled when
- NETZIP support was enabled
-- added the -e option to allow transmission of every message to remote
- hosts (effectively turns off duplicate message suppression)
-- (somewhat) improved memory consumption when compiled with MySQL support
-- looks like we fixed an incompatibility with MySQL 5.x and above software
- At least in one case, the remote server name was destroyed, leading to
- a connection failure. The new, improved code does not have this issue and
- so we see this as solved (the new code is generally somewhat better, so
- there is a good chance we fixed this incompatibility).
----------------------------------------------------------------------------
-Version 1.13.0 (RGer), 2006-12-19
-- added '$' as ToPos proptery replacer specifier - means "up to the
- end of the string"
-- property replacer option "escape-cc", "drop-cc" and "space-cc" added
-- changed the handling of \0 characters inside syslog messages. We now
- consistently escape them to "#000". This is somewhat recommended in
- the draft-ietf-syslog-protocol-19 draft. While the real recomendation
- is to not escape any characters at all, we can not do this without
- considerable modification of the code. So we escape it to "#000", which
- is consistent with a sample found in the Internet-draft.
-- removed message glue logic (see printchopped() comment for details)
- Also caused removal of parts table and thus some improvements in
- memory usage.
-- changed the default MAXLINE to 2048 to take care of recent syslog
- standardization efforts (can easily be changed in syslogd.c)
-- added support for byte-counted TCP syslog messages (much like
- syslog-transport-tls-05 Internet Draft). This was necessary to
- support compression over TCP.
-- added support for receiving compressed syslog messages
-- added support for sending compressed syslog messages
-- fixed a bug where the last message in a syslog/tcp stream was
- lost if it was not properly terminated by a LF character
----------------------------------------------------------------------------
-Version 1.12.3 (RGer), 2006-10-04
-- implemented some changes to support Solaris (but support is not
- yet complete)
-- commented out (via #if 0) some methods that are currently not being use
- but should be kept for further us
-- added (interim) -u 1 option to turn off hostname and tag parsing
-- done some modifications to better support Fedora
-- made the field delimiter inside property replace configurable via
- template
-- fixed a bug in property replacer: if fields were used, the delimitor
- became part of the field. Up until now, this was barely noticable as
- the delimiter as TAB only and thus invisible to a human. With other
- delimiters available now, it quickly showed up. This bug fix might cause
- some grief to existing installations if they used the extra TAB for
- whatever reasons - sorry folks... Anyhow, a solution is easy: just add
- a TAB character contstant into your template. Thus, there has no attempt
- been made to do this in a backwards-compatible way.
----------------------------------------------------------------------------
-Version 1.12.2 (RGer), 2006-02-15
-- fixed a bug in the RFC 3339 date formatter. An extra space was added
- after the actual timestamp
-- added support for providing high-precision RFC3339 timestamps for
- (rsyslogd-)internally-generated messages
-- very (!) experimental support for syslog-protocol internet draft
- added (the draft is experimental, the code is solid ;))
-- added support for field-extracting in the property replacer
-- enhanced the legacy-syslog parser so that it can interpret messages
- that do not contain a TIMESTAMP
-- fixed a bug that caused the default socket (usually /dev/log) to be
- opened even when -o command line option was given
-- fixed a bug in the Debian sample startup script - it caused rsyslogd
- to listen to remote requests, which it shouldn't by default
----------------------------------------------------------------------------
-Version 1.12.1 (RGer), 2005-11-23
-- made multithreading work with BSD. Some signal-handling needed to be
- restructured. Also, there might be a slight delay of up to 10 seconds
- when huping and terminating rsyslogd under BSD
-- fixed a bug where a NULL-pointer was passed to printf() in logmsg().
-- fixed a bug during "make install" where rc3195d was not installed
- Thanks to Bennett Todd for spotting this.
-- fixed a bug where rsyslogd dumped core when no TAG was found in the
- received message
-- enhanced message parser so that it can deal with missing hostnames
- in many cases (may not be totally fail-safe)
-- fixed a bug where internally-generated messages did not have the correct
- TAG
----------------------------------------------------------------------------
-Version 1.12.0 (RGer), 2005-10-26
-- moved to a multi-threaded design. single-threading is still optionally
- available. Multi-threading is experimental!
-- fixed a potential race condition. In the original code, marking was done
- by an alarm handler, which could lead to all sorts of bad things. This
- has been changed now. See comments in syslogd.c/domark() for details.
-- improved debug output for property-based filters
-- not a code change, but: I have checked all exit()s to make sure that
- none occurs once rsyslogd has started up. Even in unusual conditions
- (like low-memory conditions) rsyslogd somehow remains active. Of course,
- it might loose a message or two, but at least it does not abort and it
- can also recover when the condition no longer persists.
-- fixed a bug that could cause loss of the last message received
- immediately before rsyslogd was terminated.
-- added comments on thread-safety of global variables in syslogd.c
-- fixed a small bug: spurios printf() when TCP syslog was used
-- fixed a bug that causes rsyslogd to dump core on termination when one
- of the selector lines did not receive a message during the run (very
- unlikely)
-- fixed an one-too-low memory allocation in the TCP sender. Could result
- in rsyslogd dumping core.
-- fixed a bug with regular expression support (thanks to Andres Riancho)
-- a little bit of code restructuring (especially main(), which was
- horribly large)
----------------------------------------------------------------------------
-Version 1.11.1 (RGer), 2005-10-19
-- support for BSD-style program name and host blocks
-- added a new property "programname" that can be used in templates
-- added ability to specify listen port for rfc3195d
-- fixed a bug that rendered the "startswith" comparison operation
- unusable.
-- changed more functions to "static" storage class to help compiler
- optimize (should have been static in the first place...)
-- fixed a potential memory leak in the string buffer class destructor.
- As the destructur was previously never called, the leak did not actually
- appear.
-- some internal restructuring in anticipation/preparation of minimal
- multi-threading support
-- rsyslogd still shares some code with the sysklogd project. Some patches
- for this shared code have been brought over from the sysklogd CVS.
----------------------------------------------------------------------------
-Version 1.11.0 (RGer), 2005-10-12
-- support for receiving messages via RFC 3195; added rfc3195d for that
- purpose
-- added an additional guard to prevent rsyslogd from aborting when the
- 2gb file size limit is hit. While a user can configure rsyslogd to
- handle such situations, it would abort if that was not done AND large
- file support was not enabled (ok, this is hopefully an unlikely scenario)
-- fixed a bug that caused additional Unix domain sockets to be incorrectly
- processed - could lead to message loss in extreme cases
----------------------------------------------------------------------------
-Version 1.10.2 (RGer), 2005-09-27
-- added comparison operations in property-based filters:
- * isequal
- * startswith
-- added ability to negate all property-based filter comparison operations
- by adding a !-sign right in front of the operation name
-- added the ability to specify remote senders for UDP and TCP
- received messages. Allows to block all but well-known hosts
-- changed the $-config line directives to be case-INsensitive
-- new command line option -w added: "do not display warnings if messages
- from disallowed senders are received"
-- fixed a bug that caused rsyslogd to dump core when the compare value
- was not quoted in property-based filters
-- fixed a bug in the new CStr compare function which lead to invalid
- results (fortunately, this function was not yet used widely)
-- added better support for "debugging" rsyslog.conf property filters
- (only if -d switch is given)
-- changed some function definitions to static, which eventually enables
- some compiler optimizations
-- fixed a bug in MySQL code; when a SQL error occured, rsyslogd could
- run in a tight loop. This was due to invalid sequence of error reporting
- and is now fixed.
----------------------------------------------------------------------------
-Version 1.10.1 (RGer), 2005-09-23
-- added the ability to execute a shell script as an action.
- Thanks to Bjoern Kalkbrenner for providing the code!
-- fixed a bug in the MySQL code; due to the bug the automatic one-time
- retry after an error did not happen - this lead to error message in
- cases where none should be seen (e.g. after a MySQL restart)
-- fixed a security issue with SQL-escaping in conjunction with
- non-(SQL-)standard MySQL features.
----------------------------------------------------------------------------
-Version 1.10.0 (RGer), 2005-09-20
- REMINDER: 1.10 is the first unstable version if the 1.x series!
-- added the capability to filter on any property in selector lines
- (not just facility and priority)
-- changed stringbuf into a new counted string class
-- added support for a "discard" action. If a selector line with
- discard (~ character) is found, no selector lines *after* that
- line will be processed.
-- thanks to Andres Riancho, regular expression support has been
- added to the template engine
-- added the FROMHOST property in the template processor, which could
- previously not be obtained. Thanks to Cristian Testa for pointing
- this out and even providing a fix.
-- added display of compile-time options to -v output
-- performance improvement for production build - made some checks
- to happen only during debug mode
-- fixed a problem with compiling on SUSE and - while doing so - removed
- the socket call to set SO_BSDCOMPAT in cases where it is obsolete.
----------------------------------------------------------------------------
-Version 1.0.4 (RGer), 2006-02-01
-- a small but important fix: the tcp receiver had two forgotten printf's
- in it that caused a lot of unnecessary output to stdout. This was
- important enough to justify a new release
----------------------------------------------------------------------------
-Version 1.0.3 (RGer), 2005-11-14
-- added an additional guard to prevent rsyslogd from aborting when the
- 2gb file size limit is hit. While a user can configure rsyslogd to
- handle such situations, it would abort if that was not done AND large
- file support was not enabled (ok, this is hopefully an unlikely scenario)
-- fixed a bug that caused additional Unix domain sockets to be incorrectly
- processed - could lead to message loss in extreme cases
-- applied some patches available from the sysklogd project to code
- shared from there
-- fixed a bug that causes rsyslogd to dump core on termination when one
- of the selector lines did not receive a message during the run (very
- unlikely)
-- fixed an one-too-low memory allocation in the TCP sender. Could result
- in rsyslogd dumping core.
-- fixed a bug in the TCP sender that caused the retry logic to fail
- after an error or receiver overrun
-- fixed a bug in init() that could lead to dumping core
-- fixed a bug that could lead to dumping core when no HOSTNAME or no TAG
- was present in the syslog message
----------------------------------------------------------------------------
-Version 1.0.2 (RGer), 2005-10-05
-- fixed an issue with MySQL error reporting. When an error occured,
- the MySQL driver went into an endless loop (at least in most cases).
----------------------------------------------------------------------------
-Version 1.0.1 (RGer), 2005-09-23
-- fixed a security issue with SQL-escaping in conjunction with
- non-(SQL-)standard MySQL features.
----------------------------------------------------------------------------
-Version 1.0.0 (RGer), 2005-09-12
-- changed install doc to cover daily cron scripts - a trouble source
-- added rc script for slackware (provided by Chris Elvidge - thanks!)
-- fixed a really minor bug in usage() - the -r option was still
- reported as without the port parameter
----------------------------------------------------------------------------
-Version 0.9.8 (RGer), 2005-09-05
-- made startup and shutdown message more consistent and included the
- pid, so that they can be easier correlated. Used syslog-protocol
- structured data format for this purpose.
-- improved config info in startup message, now tells not only
- if it is listening remote on udp, but also for tcp. Also includes
- the port numbers. The previous startup message was misleading, because
- it did not say "remote reception" if rsyslogd was only listening via
- tcp (but not via udp).
-- added a "how can you help" document to the doc set
----------------------------------------------------------------------------
-Version 0.9.7 (RGer), 2005-08-15
-- some of the previous doc files (like INSTALL) did not properly
- reflect the changes to the build process and the new doc. Fixed
- that.
-- changed syslogd.c so that when compiled without database support,
- an error message is displayed when a database action is detected
- in the config file (previously this was used as an user rule ;))
-- fixed a bug in the os-specific Makefiles which caused MySQL
- support to not be compiled, even if selected
----------------------------------------------------------------------------
-Version 0.9.6 (RGer), 2005-08-09
-- greatly enhanced documentation. Now available in html format in
- the "doc" folder and FreeBSD. Finally includes an install howto.
-- improved MySQL error messages a little - they now show up as log
- messages, too (formerly only in debug mode)
-- added the ability to specify the listen port for udp syslog.
- WARNING: This introduces an incompatibility. Formerly, udp
- syslog was enabled by the -r command line option. Now, it is
- "-r [port]", which is consistent with the tcp listener. However,
- just -r will now return an error message.
-- added sample startup scripts for Debian and FreeBSD
-- added support for easy feature selection in the makefile. Un-
- fortunately, this also means I needed to spilt the make file
- for different OS and distros. There are some really bad syntax
- differences between FreeBSD and Linux make.
----------------------------------------------------------------------------
-Version 0.9.5 (RGer), 2005-08-01
-- the "semicolon bug" was actually not (fully) solved in 0.9.4. One
- part of the bug was solved, but another still existed. This one
- is fixed now, too.
-- the "semicolon bug" actually turned out to be a more generic bug.
- It appeared whenever an invalid template name was given. With some
- selector actions, rsyslogd dumped core, with other it "just" had
- a small ressource leak with others all worked well. These anomalies
- are now fixed. Note that they only appeared during system initaliziation
- once the system was running, nothing bad happened.
-- improved error reporting for template errors on startup. They are now
- shown on the console and the start-up tty. Formerly, they were only
- visible in debug mode.
-- support for multiple instances of rsyslogd on a single machine added
-- added new option "-o" --> omit local unix domain socket. This option
- enables rsyslogd NOT to listen to the local socket. This is most
- helpful when multiple instances of rsyslogd (or rsyslogd and another
- syslogd) shall run on a single system.
-- added new option "-i <pidfile>" which allows to specify the pidfile.
- This is needed when multiple instances of rsyslogd are to be run.
-- the new project home page is now online at www.rsyslog.com
----------------------------------------------------------------------------
-Version 0.9.4 (RGer), 2005-07-25
-- finally added the TCP sender. It now supports non-blocking mode, no
- longer disabling message reception during connect. As it is now, it
- is usable in production. The code could be more sophisticated, but
- I've kept it short in anticipation of the move to liblogging, which
- will lead to the removal of the code just written ;)
-- the "exiting on signal..." message still had the "syslogd" name in
- it. Changed this to "rsyslogd", as we do not have a large user base
- yet, this should pose no problem.
-- fixed "the semiconlon" bug. rsyslogd dumped core if a write-db action
- was specified but no semicolon was given after the password (an empty
- template was ok, but the semicolon needed to be present).
-- changed a default for traditional output format. During testing, it
- was seen that the timestamp written to file in default format was
- the time of message reception, not the time specified in the TIMESTAMP
- field of the message itself. Traditionally, the message TIMESTAMP is
- used and this has been changed now.
----------------------------------------------------------------------------
-Version 0.9.3 (RGer), 2005-07-19
-- fixed a bug in the message parser. In June, the RFC 3164 timestamp
- was not correctly parsed (yes, only in June and some other months,
- see the code comment to learn why...)
-- added the ability to specify the destination port when forwarding
- syslog messages (both for TCP and UDP)
-- added an very experimental TCP sender (activated by
- @@machine:port in config). This is not yet for production use. If
- the receiver is not alive, rsyslogd will wait quite some time until
- the connection request times out, which most probably leads to
- loss of incoming messages.
-
----------------------------------------------------------------------------
-Version 0.9.2 (RGer), around 2005-07-06
-- I intended to change the maxsupported message size to 32k to
- support IHE - but given the memory inefficiency in the usual use
- cases, I have not done this. I have, however, included very
- specific instructions on how to do this in the source code. I have
- also done some testing with 32k messages, so you can change the
- max size without taking too much risk.
-- added a syslog/tcp receiver; we now can receive messages via
- plain tcp, but we can still send only via UDP. The syslog/tcp
- receiver is the primary enhancement of this release.
-- slightly changed some error messages that contained a spurios \n at
- the end of the line (which gives empty lines in your log...)
-
----------------------------------------------------------------------------
-Version 0.9.1 (RGer)
-- fixed code so that it compiles without errors under FreeBSD
-- removed now unused function "allocate_log()" from syslogd.c
-- changed the make file so that it contains more defines for
- different environments (in the long term, we need a better
- system for disabling/enabling features...)
-- changed some printf's printing off_t types to %lld and
- explicit (long long) casts. I tried to figure out the exact type,
- but did not succeed in this. In the worst case, ultra-large peta-
- byte files will now display funny informational messages on rollover,
- something I think we can live with for the next 10 years or so...
-
----------------------------------------------------------------------------
-Version 0.9.0 (RGer)
-- changed the filed structure to be a linked list. Previously, it
- was a table - well, for non-SYSV it was defined as linked list,
- but from what I see that code did no longer work after my
- modifications. I am now using a linked list in general because
- that is needed for other upcoming modifications.
-- fixed a bug that caused rsyslogd not to listen to anything if
- the configuration file could not be read
-- pervious versions disabled network logging (send/receive) if
- syslog/udp port was not in /etc/services. Now defaulting to
- port 514 in this case.
-- internal error messages are now supported up to 256 bytes
-- error message seen during config file read are now also displayed
- to the attached tty and not only the console
-- changed some error messages during init to be sent to the console
- and/or emergency log. Previously, they were only seen if the
- -d (debug) option was present on the command line.
-- fixed the "2gb file issue on 32bit systems". If a file grew to
- more than 2gb, the syslogd was aborted with "file size exceeded".
- Now, defines have been added according to
- http://www.daimi.au.dk/~kasperd/comp.os.linux.development.faq.html#LARGEFILE
- Testing revealed that they work ;)
- HOWEVER, if your file system, glibc, kernel, whatever does not
- support files larger 2gb, you need to set a file size limit with
- the new output channel mechanism.
-- updated man pages to reflect the changes
-
----------------------------------------------------------------------------
-Version 0.8.4
-
-- improved -d debug output (removed developer-only content)
-- now compiles under FreeBSD and NetBSD (only quick testing done on NetBSD)
----------------------------------------------------------------------------
-Version 0.8.3
-
-- security model in "make install" changed
-- minor doc updates
----------------------------------------------------------------------------
-Version 0.8.2
-
-- added man page for rsyslog.conf and rsyslogd
-- gave up on the concept of rsyslog being a "drop in" replacement
- for syslogd. Now, the user installs rsyslogd and also needs to
- adjust his system settings to this specifically. This also lead
- to these changes:
- * changed Makefile so that install now installs rsyslogd instead
- of dealing with syslogd
- * changed the default config file name to rsyslog.conf
----------------------------------------------------------------------------
-Version 0.8.1
-
-- fixed a nasty memory leak (probably not the last one with this release)
-- some enhancements to Makefile as suggested by Bennett Todd
-- syslogd-internal messages (like restart) were missing the hostname
- this has been corrected
----------------------------------------------------------------------------
-Version 0.8.0
-
-Initial testing release. Based on the sysklogd package. Thanks to the
-sysklogd maintainers for all their good work!
----------------------------------------------------------------------------
-
-----------------------------------------------------------------------
-The following comments are from the stock syslogd.c source. They provide
-some insight into what happened to the source before we forked
-rsyslogd. However, much of the code already has been replaced and more
-is to be replaced. So over time, these comments become less valuable.
-I have moved them out of the syslogd.c file to shrink it, especially
-as a lot of them do no longer apply. For historical reasons and
-understanding of how the daemon evolved, they are probably still
-helpful.
-----------------------------------------------------------------------
-/*
- * syslogd -- log system messages
- *
- * This program implements a system log. It takes a series of lines.
- * Each line may have a priority, signified as "<n>" as
- * the first characters of the line. If this is
- * not present, a default priority is used.
- *
- * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will
- * cause it to reread its configuration file.
- *
- * Defined Constants:
- *
- * MAXLINE -- the maximum line length that can be handled.
- * DEFUPRI -- the default priority for user messages
- * DEFSPRI -- the default priority for kernel messages
- *
- * Author: Eric Allman
- * extensive changes by Ralph Campbell
- * more extensive changes by Eric Allman (again)
- *
- * Steve Lord: Fix UNIX domain socket code, added linux kernel logging
- * change defines to
- * SYSLOG_INET - listen on a UDP socket
- * SYSLOG_UNIXAF - listen on unix domain socket
- * SYSLOG_KERNEL - listen to linux kernel
- *
- * Mon Feb 22 09:55:42 CST 1993: Dr. Wettstein
- * Additional modifications to the source. Changed priority scheme
- * to increase the level of configurability. In its stock configuration
- * syslogd no longer logs all messages of a certain priority and above
- * to a log file. The * wildcard is supported to specify all priorities.
- * Note that this is a departure from the BSD standard.
- *
- * Syslogd will now listen to both the inetd and the unixd socket. The
- * strategy is to allow all local programs to direct their output to
- * syslogd through the unixd socket while the program listens to the
- * inetd socket to get messages forwarded from other hosts.
- *
- * Fri Mar 12 16:55:33 CST 1993: Dr. Wettstein
- * Thanks to Stephen Tweedie (dcs.ed.ac.uk!sct) for helpful bug-fixes
- * and an enlightened commentary on the prioritization problem.
- *
- * Changed the priority scheme so that the default behavior mimics the
- * standard BSD. In this scenario all messages of a specified priority
- * and above are logged.
- *
- * Add the ability to specify a wildcard (=) as the first character
- * of the priority name. Doing this specifies that ONLY messages with
- * this level of priority are to be logged. For example:
- *
- * *.=debug /usr/adm/debug
- *
- * Would log only messages with a priority of debug to the /usr/adm/debug
- * file.
- *
- * Providing an * as the priority specifies that all messages are to be
- * logged. Note that this case is degenerate with specifying a priority
- * level of debug. The wildcard * was retained because I believe that
- * this is more intuitive.
- *
- * Thu Jun 24 11:34:13 CDT 1993: Dr. Wettstein
- * Modified sources to incorporate changes in libc4.4. Messages from
- * syslog are now null-terminated, syslogd code now parses messages
- * based on this termination scheme. Linux as of libc4.4 supports the
- * fsync system call. Modified code to fsync after all writes to
- * log files.
- *
- * Sat Dec 11 11:59:43 CST 1993: Dr. Wettstein
- * Extensive changes to the source code to allow compilation with no
- * complaints with -Wall.
- *
- * Reorganized the facility and priority name arrays so that they
- * compatible with the syslog.h source found in /usr/include/syslog.h.
- * NOTE that this should really be changed. The reason I do not
- * allow the use of the values defined in syslog.h is on account of
- * the extensions made to allow the wildcard character in the
- * priority field. To fix this properly one should malloc an array,
- * copy the contents of the array defined by syslog.h and then
- * make whatever modifications that are desired. Next round.
- *
- * Thu Jan 6 12:07:36 CST 1994: Dr. Wettstein
- * Added support for proper decomposition and re-assembly of
- * fragment messages on UNIX domain sockets. Lack of this capability
- * was causing 'partial' messages to be output. Since facility and
- * priority information is encoded as a leader on the messages this
- * was causing lines to be placed in erroneous files.
- *
- * Also added a patch from Shane Alderton (shane@ion.apana.org.au) to
- * correct a problem with syslogd dumping core when an attempt was made
- * to write log messages to a logged-on user. Thank you.
- *
- * Many thanks to Juha Virtanen (jiivee@hut.fi) for a series of
- * interchanges which lead to the fixing of problems with messages set
- * to priorities of none and emerg. Also thanks to Juha for a patch
- * to exclude users with a class of LOGIN from receiving messages.
- *
- * Shane Alderton provided an additional patch to fix zombies which
- * were conceived when messages were written to multiple users.
- *
- * Mon Feb 6 09:57:10 CST 1995: Dr. Wettstein
- * Patch to properly reset the single priority message flag. Thanks
- * to Christopher Gori for spotting this bug and forwarding a patch.
- *
- * Wed Feb 22 15:38:31 CST 1995: Dr. Wettstein
- * Added version information to startup messages.
- *
- * Added defines so that paths to important files are taken from
- * the definitions in paths.h. Hopefully this will insure that
- * everything follows the FSSTND standards. Thanks to Chris Metcalf
- * for a set of patches to provide this functionality. Also thanks
- * Elias Levy for prompting me to get these into the sources.
- *
- * Wed Jul 26 18:57:23 MET DST 1995: Martin Schulze
- * Linux' gethostname only returns the hostname and not the fqdn as
- * expected in the code. But if you call hostname with an fqdn then
- * gethostname will return an fqdn, so we have to mention that. This
- * has been changed.
- *
- * The 'LocalDomain' and the hostname of a remote machine is
- * converted to lower case, because the original caused some
- * inconsistency, because the (at least my) nameserver did respond an
- * fqdn containing of upper- _and_ lowercase letters while
- * 'LocalDomain' consisted only of lowercase letters and that didn't
- * match.
- *
- * Sat Aug 5 18:59:15 MET DST 1995: Martin Schulze
- * Now no messages that were received from any remote host are sent
- * out to another. At my domain this missing feature caused ugly
- * syslog-loops, sometimes.
- *
- * Remember that no message is sent out. I can't figure out any
- * scenario where it might be useful to change this behavior and to
- * send out messages to other hosts than the one from which we
- * received the message, but I might be shortsighted. :-/
- *
- * Thu Aug 10 19:01:08 MET DST 1995: Martin Schulze
- * Added my pidfile.[ch] to it to perform a better handling with
- * pidfiles. Now both, syslogd and klogd, can only be started
- * once. They check the pidfile.
- *
- * Sun Aug 13 19:01:41 MET DST 1995: Martin Schulze
- * Add an addition to syslog.conf's interpretation. If a priority
- * begins with an exclamation mark ('!') the normal interpretation
- * of the priority is inverted: ".!*" is the same as ".none", ".!=info"
- * don't logs the info priority, ".!crit" won't log any message with
- * the priority crit or higher. For example:
- *
- * mail.*;mail.!=info /usr/adm/mail
- *
- * Would log all messages of the facility mail except those with
- * the priority info to /usr/adm/mail. This makes the syslogd
- * much more flexible.
- *
- * Defined TABLE_ALLPRI=255 and changed some occurrences.
- *
- * Sat Aug 19 21:40:13 MET DST 1995: Martin Schulze
- * Making the table of facilities and priorities while in debug
- * mode more readable.
- *
- * If debugging is turned on, printing the whole table of
- * facilities and priorities every hexadecimal or 'X' entry is
- * now 2 characters wide.
- *
- * The number of the entry is prepended to each line of
- * facilities and priorities, and F_UNUSED lines are not shown
- * anymore.
- *
- * Corrected some #ifdef SYSV's.
- *
- * Mon Aug 21 22:10:35 MET DST 1995: Martin Schulze
- * Corrected a strange behavior during parsing of configuration
- * file. The original BSD syslogd doesn't understand spaces as
- * separators between specifier and action. This syslogd now
- * understands them. The old behavior caused some confusion over
- * the Linux community.
- *
- * Thu Oct 19 00:02:07 MET 1995: Martin Schulze
- * The default behavior has changed for security reasons. The
- * syslogd will not receive any remote message unless you turn
- * reception on with the "-r" option.
- *
- * Not defining SYSLOG_INET will result in not doing any network
- * activity, i.e. not sending or receiving messages. I changed
- * this because the old idea is implemented with the "-r" option
- * and the old thing didn't work anyway.
- *
- * Thu Oct 26 13:14:06 MET 1995: Martin Schulze
- * Added another logfile type F_FORW_UNKN. The problem I ran into
- * was a name server that runs on my machine and a forwarder of
- * kern.crit to another host. The hosts address can only be
- * fetched using the nameserver. But named is started after
- * syslogd, so syslogd complained.
- *
- * This logfile type will retry to get the address of the
- * hostname ten times and then complain. This should be enough to
- * get the named up and running during boot sequence.
- *
- * Fri Oct 27 14:08:15 1995: Dr. Wettstein
- * Changed static array of logfiles to a dynamic array. This
- * can grow during process.
- *
- * Fri Nov 10 23:08:18 1995: Martin Schulze
- * Inserted a new tabular sys_h_errlist that contains plain text
- * for error codes that are returned from the net subsystem and
- * stored in h_errno. I have also changed some wrong lookups to
- * sys_errlist.
- *
- * Wed Nov 22 22:32:55 1995: Martin Schulze
- * Added the fabulous strip-domain feature that allows us to
- * strip off (several) domain names from the fqdn and only log
- * the simple hostname. This is useful if you're in a LAN that
- * has a central log server and also different domains.
- *
- * I have also also added the -l switch do define hosts as
- * local. These will get logged with their simple hostname, too.
- *
- * Thu Nov 23 19:02:56 MET DST 1995: Martin Schulze
- * Added the possibility to omit fsyncing of logfiles after every
- * write. This will give some performance back if you have
- * programs that log in a very verbose manner (like innd or
- * smartlist). Thanks to Stephen R. van den Berg <srb@cuci.nl>
- * for the idea.
- *
- * Thu Jan 18 11:14:36 CST 1996: Dr. Wettstein
- * Added patche from beta-testers to stop compile error. Also
- * added removal of pid file as part of termination cleanup.
- *
- * Wed Feb 14 12:42:09 CST 1996: Dr. Wettstein
- * Allowed forwarding of messages received from remote hosts to
- * be controlled by a command-line switch. Specifying -h allows
- * forwarding. The default behavior is to disable forwarding of
- * messages which were received from a remote host.
- *
- * Parent process of syslogd does not exit until child process has
- * finished initialization process. This allows rc.* startup to
- * pause until syslogd facility is up and operating.
- *
- * Re-arranged the select code to move UNIX domain socket accepts
- * to be processed later. This was a contributed change which
- * has been proposed to correct the delays sometimes encountered
- * when syslogd starts up.
- *
- * Minor code cleanups.
- *
- * Thu May 2 15:15:33 CDT 1996: Dr. Wettstein
- * Fixed bug in init function which resulted in file descripters
- * being orphaned when syslogd process was re-initialized with SIGHUP
- * signal. Thanks to Edvard Tuinder
- * (Edvard.Tuinder@praseodymium.cistron.nl) for putting me on the
- * trail of this bug. I am amazed that we didn't catch this one
- * before now.
- *
- * Tue May 14 00:03:35 MET DST 1996: Martin Schulze
- * Corrected a mistake that causes the syslogd to stop logging at
- * some virtual consoles under Linux. This was caused by checking
- * the wrong error code. Thanks to Michael Nonweiler
- * <mrn20@hermes.cam.ac.uk> for sending me a patch.
- *
- * Mon May 20 13:29:32 MET DST 1996: Miquel van Smoorenburg <miquels@cistron.nl>
- * Added continuation line supported and fixed a bug in
- * the init() code.
- *
- * Tue May 28 00:58:45 MET DST 1996: Martin Schulze
- * Corrected behaviour of blocking pipes - i.e. the whole system
- * hung. Michael Nonweiler <mrn20@hermes.cam.ac.uk> has sent us
- * a patch to correct this. A new logfile type F_PIPE has been
- * introduced.
- *
- * Mon Feb 3 10:12:15 MET DST 1997: Martin Schulze
- * Corrected behaviour of logfiles if the file can't be opened.
- * There was a bug that causes syslogd to try to log into non
- * existing files which ate cpu power.
- *
- * Sun Feb 9 03:22:12 MET DST 1997: Martin Schulze
- * Modified syslogd.c to not kill itself which confuses bash 2.0.
- *
- * Mon Feb 10 00:09:11 MET DST 1997: Martin Schulze
- * Improved debug code to decode the numeric facility/priority
- * pair into textual information.
- *
- * Tue Jun 10 12:35:10 MET DST 1997: Martin Schulze
- * Corrected freeing of logfiles. Thanks to Jos Vos <jos@xos.nl>
- * for reporting the bug and sending an idea to fix the problem.
- *
- * Tue Jun 10 12:51:41 MET DST 1997: Martin Schulze
- * Removed sleep(10) from parent process. This has caused a slow
- * startup in former times - and I don't see any reason for this.
- *
- * Sun Jun 15 16:23:29 MET DST 1997: Michael Alan Dorman
- * Some more glibc patches made by <mdorman@debian.org>.
- *
- * Thu Jan 1 16:04:52 CET 1998: Martin Schulze <joey@infodrom.north.de
- * Applied patch from Herbert Thielen <Herbert.Thielen@lpr.e-technik.tu-muenchen.de>.
- * This included some balance parentheses for emacs and a bug in
- * the exclamation mark handling.
- *
- * Fixed small bug which caused syslogd to write messages to the
- * wrong logfile under some very rare conditions. Thanks to
- * Herbert Xu <herbert@gondor.apana.org.au> for fiddling this out.
- *
- * Thu Jan 8 22:46:35 CET 1998: Martin Schulze <joey@infodrom.north.de>
- * Reworked one line of the above patch as it prevented syslogd
- * from binding the socket with the result that no messages were
- * forwarded to other hosts.
- *
- * Sat Jan 10 01:33:06 CET 1998: Martin Schulze <joey@infodrom.north.de>
- * Fixed small bugs in F_FORW_UNKN meachanism. Thanks to Torsten
- * Neumann <torsten@londo.rhein-main.de> for pointing me to it.
- *
- * Mon Jan 12 19:50:58 CET 1998: Martin Schulze <joey@infodrom.north.de>
- * Modified debug output concerning remote receiption.
- *
- * Mon Feb 23 23:32:35 CET 1998: Topi Miettinen <Topi.Miettinen@ml.tele.fi>
- * Re-worked handling of Unix and UDP sockets to support closing /
- * opening of them in order to have it open only if it is needed
- * either for forwarding to a remote host or by receiption from
- * the network.
- *
- * Wed Feb 25 10:54:09 CET 1998: Martin Schulze <joey@infodrom.north.de>
- * Fixed little comparison mistake that prevented the MARK
- * feature to work properly.
- *
- * Wed Feb 25 13:21:44 CET 1998: Martin Schulze <joey@infodrom.north.de>
- * Corrected Topi's patch as it prevented forwarding during
- * startup due to an unknown LogPort.
- *
- * Sat Oct 10 20:01:48 CEST 1998: Martin Schulze <joey@infodrom.north.de>
- * Added support for TESTING define which will turn syslogd into
- * stdio-mode used for debugging.
- *
- * Sun Oct 11 20:16:59 CEST 1998: Martin Schulze <joey@infodrom.north.de>
- * Reworked the initialization/fork code. Now the parent
- * process activates a signal handler which the daughter process
- * will raise if it is initialized. Only after that one the
- * parent process may exit. Otherwise klogd might try to flush
- * its log cache while syslogd can't receive the messages yet.
- *
- * Mon Oct 12 13:30:35 CEST 1998: Martin Schulze <joey@infodrom.north.de>
- * Redirected some error output with regard to argument parsing to
- * stderr.
- *
- * Mon Oct 12 14:02:51 CEST 1998: Martin Schulze <joey@infodrom.north.de>
- * Applied patch provided vom Topi Miettinen with regard to the
- * people from OpenBSD. This provides the additional '-a'
- * argument used for specifying additional UNIX domain sockets to
- * listen to. This is been used with chroot()'ed named's for
- * example. See for http://www.psionic.com/papers/dns.html
- *
- * Mon Oct 12 18:29:44 CEST 1998: Martin Schulze <joey@infodrom.north.de>
- * Added `ftp' facility which was introduced in glibc version 2.
- * It's #ifdef'ed so won't harm with older libraries.
- *
- * Mon Oct 12 19:59:21 MET DST 1998: Martin Schulze <joey@infodrom.north.de>
- * Code cleanups with regard to bsd -> posix transition and
- * stronger security (buffer length checking). Thanks to Topi
- * Miettinen <tom@medialab.sonera.net>
- * . index() --> strchr()
- * . sprintf() --> snprintf()
- * . bcopy() --> memcpy()
- * . bzero() --> memset()
- * . UNAMESZ --> UT_NAMESIZE
- * . sys_errlist --> strerror()
- *
- * Mon Oct 12 20:22:59 CEST 1998: Martin Schulze <joey@infodrom.north.de>
- * Added support for setutent()/getutent()/endutend() instead of
- * binary reading the UTMP file. This is the the most portable
- * way. This allows /var/run/utmp format to change, even to a
- * real database or utmp daemon. Also if utmp file locking is
- * implemented in libc, syslog will use it immediately. Thanks
- * to Topi Miettinen <tom@medialab.sonera.net>.
- *
- * Mon Oct 12 20:49:18 MET DST 1998: Martin Schulze <joey@infodrom.north.de>
- * Avoid logging of SIGCHLD when syslogd is in the process of
- * exiting and closing its files. Again thanks to Topi.
- *
- * Mon Oct 12 22:18:34 CEST 1998: Martin Schulze <joey@infodrom.north.de>
- * Modified printline() to support 8bit characters - such as
- * russion letters. Thanks to Vladas Lapinskas <lapinskas@mail.iae.lt>.
- *
- * Sat Nov 14 02:29:37 CET 1998: Martin Schulze <joey@infodrom.north.de>
- * ``-m 0'' now turns of MARK logging entirely.
- *
- * Tue Jan 19 01:04:18 MET 1999: Martin Schulze <joey@infodrom.north.de>
- * Finally fixed an error with `-a' processing, thanks to Topi
- * Miettinen <tom@medialab.sonera.net>.
- *
- * Sun May 23 10:08:53 CEST 1999: Martin Schulze <joey@infodrom.north.de>
- * Removed superflous call to utmpname(). The path to the utmp
- * file is defined in the used libc and should not be hardcoded
- * into the syslogd binary referring the system it was compiled on.
- *
- * Sun Sep 17 20:45:33 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
- * Fixed some bugs in printline() code that did not escape
- * control characters '\177' through '\237' and contained a
- * single-byte buffer overflow. Thanks to Solar Designer
- * <solar@false.com>.
- *
- * Sun Sep 17 21:26:16 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
- * Don't close open sockets upon reload. Thanks to Bill
- * Nottingham.
- *
- * Mon Sep 18 09:10:47 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
- * Fixed bug in printchopped() that caused syslogd to emit
- * kern.emerg messages when splitting long lines. Thanks to
- * Daniel Jacobowitz <dan@debian.org> for the fix.
- *
- * Mon Sep 18 15:33:26 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
- * Removed unixm/unix domain sockets and switch to Datagram Unix
- * Sockets. This should remove one possibility to play DoS with
- * syslogd. Thanks to Olaf Kirch <okir@caldera.de> for the patch.
- *
- * Sun Mar 11 20:23:44 CET 2001: Martin Schulze <joey@infodrom.ffis.de>
- * Don't return a closed fd if `-a' is called with a wrong path.
- * Thanks to Bill Nottingham <notting@redhat.com> for providing
- * a patch.
- *
- * The following copyright and license applies to the original
- * sysklogd package that was used as a basis for this release of
- * rsyslogd. Obviously, it applies to those parts stemming directly
- * back to the original sysklogd package.
- *
- * Copyright (c) 1983, 1988 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
+This file has been superseeded by ChangeLog. Please see there.