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Remove historical changelogs from files

Browse Source 
We don't need to carry it any longer.  Anyone who wants to read them can
access an older GIT version, or released tarball.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This commit is contained in:
Joachim Nilsson 2019-10-27 21:30:03 +01:00
parent 0603849891
commit bf448fc6a1
9 changed files with 0 additions and 918 deletions
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236
src/klogd.c
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@ -22,242 +22,6 @@
* MA 02110-1301, USA.
*/
/*
* Steve Lord (lord@cray.com) 7th Nov 92
*
* Modified to check for kernel info by Dr. G.W. Wettstein 02/17/93.
*
* Fri Mar 12 16:53:56 CST 1993: Dr. Wettstein
* Modified LogLine to use a newline as the line separator in
* the kernel message buffer.
*
* Added debugging code to dump the contents of the kernel message
* buffer at the start of the LogLine function.
*
* Thu Jul 29 11:40:32 CDT 1993: Dr. Wettstein
* Added syscalls to turn off logging of kernel messages to the
* console when klogd becomes responsible for kernel messages.
*
* klogd now catches SIGTERM and SIGKILL signals. Receipt of these
* signals cases the clean_up function to be called which shuts down
* kernel logging and re-enables logging of messages to the console.
*
* Sat Dec 11 11:54:22 CST 1993: Dr. Wettstein
* Added fixes to allow compilation with no complaints with -Wall.
*
* When the daemon catches a fatal signal (SIGTERM, SIGKILL) a
* message is output to the logfile advising that the daemon is
* going to terminate.
*
* Thu Jan 6 11:54:10 CST 1994: Dr. Wettstein
* Major re-write/re-organization of the code.
*
* Klogd now assigns kernel messages to priority levels when output
* to the syslog facility is requested. The priority level is
* determined by decoding the prioritization sequence which is
* tagged onto the start of the kernel messages.
*
* Added the following program options: -f arg -c arg -s -o -d
*
* The -f switch can be used to specify that output should
* be written to the named file.
*
* The -c switch is used to specify the level of kernel
* messages which are to be directed to the console.
*
* The -s switch causes the program to use the syscall
* interface to the kernel message facility. This can be
* used to override the presence of the /proc filesystem.
*
* The -o switch causes the program to operate in 'one-shot'
* mode. A single call will be made to read the complete
* kernel buffer. The contents of the buffer will be
* output and the program will terminate.
*
* The -d switch causes 'debug' mode to be activated. This
* will cause the daemon to generate LOTS of output to stderr.
*
* The buffer decomposition function (LogLine) was re-written to
* squash a bug which was causing only partial kernel messages to
* be written to the syslog facility.
*
* The signal handling code was modified to properly differentiate
* between the STOP and TSTP signals.
*
* Added pid saving when the daemon detaches into the background. Thank
* you to Juha Virtanen (jiivee@hut.fi) for providing this patch.
*
* Mon Feb 6 07:31:29 CST 1995: Dr. Wettstein
* Significant re-organization of the signal handling code. The
* signal handlers now only set variables. Not earth shaking by any
* means but aesthetically pleasing to the code purists in the group.
*
* Patch to make things more compliant with the file system standards.
* Thanks to Chris Metcalf for prompting this helpful change.
*
* The routines responsible for reading the kernel log sources now
* initialize the buffers before reading. I think that this will
* solve problems with non-terminated kernel messages producing
* output of the form: new old old old
*
* This may also help influence the occassional reports of klogd
* failing under significant load. I think that the jury may still
* be out on this one though. My thanks to Joerg Ahrens for initially
* tipping me off to the source of this problem. Also thanks to
* Michael O'Reilly for tipping me off to the best fix for this problem.
* And last but not least Mark Lord for prompting me to try this as
* a means of attacking the stability problem.
*
* Specifying a - as the arguement to the -f switch will cause output
* to be directed to stdout rather than a filename of -. Thanks to
* Randy Appleton for a patch which prompted me to do this.
*
* Wed Feb 22 15:37:37 CST 1995: Dr. Wettstein
* Added version information to logging startup messages.
*
* Wed Jul 26 18:57:23 MET DST 1995: Martin Schulze
* Added an commandline argument "-n" to avoid forking. This obsoletes
* the compiler define NO_FORK. It's more useful to have this as an
* argument as there are many binary versions and one doesn't need to
* recompile the daemon.
*
* 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.
*
* Fri Nov 17 15:05:43 CST 1995: Dr. Wettstein
* Added support for kernel address translation. This required moving
* some definitions and includes to the new klogd.h file. Some small
* code cleanups and modifications.
*
* Mon Nov 20 10:03:39 MET 1995
* Added -v option to print the version and exit.
*
* Thu Jan 18 11:19:46 CST 1996: Dr. Wettstein
* Added suggested patches from beta-testers. These address two
* two problems. The first is segmentation faults which occur with
* the ELF libraries. This was caused by passing a null pointer to
* the strcmp function.
*
* Added a second patch to remove the pidfile as part of the
* termination cleanup sequence. This minimizes the potential for
* conflicting pidfiles causing immediate termination at boot time.
*
* Wed Aug 21 09:13:03 CDT 1996: Dr. Wettstein
* Added ability to reload static symbols and kernel module symbols
* under control of SIGUSR1 and SIGUSR2 signals.
*
* Added -p switch to select 'paranoid' behavior with respect to the
* loading of kernel module symbols.
*
* Informative line now printed whenever a state change occurs due
* to signal reception by the daemon.
*
* Added the -i and -I command line switches to signal the currently
* executing daemon.
*
* Tue Nov 19 10:15:36 PST 1996: Leland Olds <olds@eskimo.com>
* Corrected vulnerability to buffer overruns by rewriting LogLine
* routine. Obscenely long kernel messages will now be broken up
* into lines no longer than LOG_LINE_LENGTH.
*
* The last version of LogLine was vulnerable to buffer overruns:
* - Kernel messages longer than LOG_LINE_LENGTH caused a buffer
* overrun.
* - If a line was determined to be shorter than LOG_LINE_LENGTH,
* the routine "ExpandKadds" could cause the line grow by
* an unknown amount and overrun a buffer.
* I turned these routines into a little parsing state machine that
* should not have these problems.
*
* Sun Jun 15 16:23:29 MET DST 1997: Michael Alan Dorman
* Some more glibc patches made by <mdorman@debian.org>.
*
* Thu Aug 21 12:11:27 MET DST 1997: Martin Schulze <joey@infodrom.north.de>
* Fixed little mistake which prevented klogd from accepting a
* console log
*
* Fri Jan 9 00:39:52 CET 1998: Martin Schulze <joey@infodrom.north.de>
* Changed the behaviour of klogd when receiving a terminate
* signal. Now the program terminates immediately instead of
* completing the receipt of a kernel message, i.e the read()
* call. The old behaveiour could result in klogd being
* recognized as being undead, because it'll only die after a
* message has been received.
*
* Fri Jan 9 11:03:48 CET 1998: Martin Schulze <joey@infodrom.north.de>
* Corrected some code that caused klogd to dump core when
* receiving messages containing '%', some of them exist in
* 2.1.78. Thanks to Chu-yeon Park <kokids@doit.ajou.ac.kr> for
* informing me.
*
* Fri Jan 9 23:38:19 CET 1998: Florian La Roche <florian@knorke.saar.de>
* Added -x switch to omit EIP translation and System.map evaluation.
*
* Sun Jan 25 20:47:46 CET 1998: Martin Schulze <joey@infodrom.north.de>
* As the bug covering the %'s introduced a problem with
* unevaluated priorities I've worked out a real fix that strips
* %'s to an even number which is harmless for printf.
*
* Sat Oct 10 20:01:48 CEST 1998: Martin Schulze <joey@infodrom.north.de>
* Added support for TESTING define which will turn klogd into
* stdio-mode used for debugging.
*
* Mon Apr 13 18:18:45 CEST 1998: Martin Schulze <joey@infodrom.north.de>
* Modified System.map read function to try all possible map
* files until a file with matching version is found. Added support for
* Debian release.
*
* Mon Oct 12 13:01:27 MET DST 1998: Martin Schulze <joey@infodrom.north.de>
* Used unsigned long and strtoul() to resolve kernel oops symbols.
*
* Sun Jan 3 18:38:03 CET 1999: Martin Schulze <joey@infodrom.north.de>
* Shortened LOG_LINE_LENGTH in order to get long lines splitted
* up earlier and syslogd has a better chance concatenating them
* together again.
*
* Sat Aug 21 12:27:02 CEST 1999: Martin Schulze <joey@infodrom.north.de>
* Skip newline when reading in messages.
*
* Tue Sep 12 22:14:33 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
* Don't feed a buffer directly to a printf-type routine, use
* "%s" as format string instead. Thanks to Jouko Pynnönen
* <jouko@solutions.fi> for pointing this out.
*
* Tue Sep 12 22:44:57 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
* Commandline option `-2': When symbols are expanded, print the
* line twice. Once with addresses converted to symbols, once with the
* raw text. Allows external programs such as ksymoops do their own
* processing on the original data. Thanks to Keith Owens
* <kaos@ocs.com.au> for the patch.
*
* Mon Sep 18 09:32:27 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
* Added patch to fix priority decoding after moving kernel
* messgages into "%s". Thanks to Solar Designer
* <solar@false.com> for the patch.
*
* Sun Mar 11 20:23:44 CET 2001: Martin Schulze <joey@infodrom.ffis.de>
* Stop LogLine() from being called with wrong argument when a
* former calculation failed already. Thanks to Thomas Roessler
* <roessler@does-not-exist.org> for providing a patch.
*
* Ignore zero bytes, no busy loop is entered anymore. Several
* people have submitted patches: Troels Walsted Hansen
* <troels@thule.no>, Wolfgang Oertl <Wolfgang.Oertl@uibk.ac.at>
* and Thomas Roessler.
*
* Thu Apr 29 15:24:07 2004: Solar Designer <solar@openwall.com>
* Prevent potential buffer overflow in reading messages from the
* kernel log rinbuffer.
*
* Sat May 26 16:33:18 2007: Martin Schulze <joey@infodrom.org>
* Improved daemonise routine to stabilise startup.
*
* Mon May 28 18:07:59 CEST 2007: Matthew Fischer <futhark@vzavenue.net>
* Remove special treatment of the percent sign.
*/
#include "config.h"
#include <errno.h>

9
src/klogd.h
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@ -22,20 +22,11 @@
* MA 02110-1301, USA.
*/
/*
* Symbols and definitions needed by klogd.
*
* Thu Nov 16 12:45:06 CST 1995: Dr. Wettstein
* Initial version.
*/
/* Useful include files. */
#include <stdio.h>
#include <syslog.h>
#include <string.h>
/* Function prototypes. */
extern int InitKsyms(char *);
extern int InitMsyms(void);
extern char *ExpandKadds(char *, char *);

100
src/ksym.c
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@ -27,108 +27,8 @@
/*
* This file contains functions which handle the translation of kernel
* numeric addresses into symbols for the klogd utility.
*
* Sat Oct 28 09:00:14 CDT 1995: Dr. Wettstein
* Initial Version.
*
* Fri Nov 24 12:50:52 CST 1995: Dr. Wettstein
* Added VERBOSE_DEBUGGING define to make debugging output more
* manageable.
*
* Added support for verification of the loaded kernel symbols. If
* no version information can be be found in the mapfile a warning
* message is issued but translation will still take place. This
* will be the default case if kernel versions < 1.3.43 are used.
*
* If the symbols in the mapfile are of the same version as the kernel
* that is running an informative message is issued. If the symbols
* in the mapfile do not match the current kernel version a warning
* message is issued and translation is disabled.
*
* Wed Dec 6 16:14:11 CST 1995: Dr. Wettstein
* Added /boot/System.map to the list of symbol maps to search for.
* Also made this map the first item in the search list. I am open
* to CONSTRUCTIVE suggestions for any additions or corrections to
* the list of symbol maps to search for. Be forewarned that the
* list in use is the consensus agreement between myself, Linus and
* some package distributers. It is a given that no list will suit
* everyone's taste. If you have rabid concerns about the list
* please feel free to edit the system_maps array and compile your
* own binaries.
*
* Added support for searching of the list of symbol maps. This
* allows support for access to multiple symbol maps. The theory
* behind this is that a production kernel may have a system map in
* /boot/System.map. If a test kernel is booted this system map
* would be skipped in favor of one found in /usr/src/linux.
*
* Thu Jan 18 11:18:31 CST 1996: Dr. Wettstein
* Added patch from beta-testers to allow for reading of both
* ELF and a.out map files.
*
* Wed Aug 21 09:15:49 CDT 1996: Dr. Wettstein
* Reloading of kernel module symbols is now turned on by the
* SetParanoiaLevel function. The default behavior is to NOT reload
* the kernel module symbols when a protection fault is detected.
*
* Added support for freeing of the current kernel module symbols.
* This was necessary to support reloading of the kernel module symbols.
*
* When a matching static symbol table is loaded the kernel version
* number is printed.
*
* Mon Jun 9 17:12:42 CST 1997: Martin Schulze
* Added #1 and #2 to some error messages in order to being able
* to divide them (ulmo@Q.Net)
*
* Fri Jun 13 10:50:23 CST 1997: Martin Schulze
* Changed definition of LookupSymbol to non-static because it is
* used in klogd.c, too.
*
* Fri Jan 9 23:00:08 CET 1998: Martin Schulze <joey@infodrom.north.de>
* Fixed bug that caused klogd to die if there is no System.map available.
*
* Sun 29 Mar 18:14:07 BST 1998: Mark Simon Phillips <M.S.Phillips@nortel.co.uk>
* Switched to fgets() as gets() is not buffer overrun secure.
*
* Mon Apr 13 18:18:45 CEST 1998: Martin Schulze <joey@infodrom.north.de>
* Modified loop for detecting the correct system map. Now it won't
* stop if a file has been found but doesn't contain the correct map.
* Special thanks go go Mark Simon Phillips for the hint.
*
* Mon Oct 12 00:42:30 CEST 1998: Martin Schulze <joey@infodrom.north.de>
* Modified CheckVersion()
* . Use shift to decode the kernel version
* . Compare integers of kernel version
* . extract major.minor.patch from utsname.release via sscanf()
* The reason lays in possible use of kernel flavours which
* modify utsname.release but no the Version_ symbol.
*
* Sun Feb 21 22:27:49 EST 1999: Keith Owens <kaos@ocs.com.au>
* Fixed bug that caused klogd to die if there is no sym_array available.
*
* Tue Sep 12 23:48:12 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
* Close symbol file in InitKsyms() when an error occurred.
*
* Thu Apr 29 18:07:16 CEST 2004: Dmitry Levin <ldv@altlinux.org>
* Close file descriptor in FindSymbolFile() in order not to leak
* file descriptors.
*
* Fri Jul 16 08:32:49 CEST 2004: Ulf Härnhammar <Ulf.Harnhammar.9485@student.uu.se>
* Added boundary check for fscanf() in InitKsyms() and
* CheckMapVersion() to prevent an unintended crash when reading
* an incorrect System.map.
*
* Mon May 28 08:27:51 CEST 2007: Martin Schulze <joey@infodrom.org>
* Added back /usr/src/linux/System.map as fall-back location.
*
* Thu May 31 16:56:26 CEST 2007: Martin Schulze <joey@infodrom.org>
* Improved symbol lookup, since symbols are spread over the entire
* address space. Return the symbol that fits best instead of
* the first hit.
*/
/* Includes. */
#include "klogd.h"
#include "ksyms.h"
#include "module.h"

63
src/ksym_mod.c
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@ -41,69 +41,6 @@
* possible.
*
* At least that is the plan.
*
* Wed Aug 21 09:20:09 CDT 1996: Dr. Wettstein
* The situation where no module support has been compiled into a
* kernel is now detected. An informative message is output indicating
* that the kernel has no loadable module support whenever kernel
* module symbols are loaded.
*
* An informative message is printed indicating the number of kernel
* modules and the number of symbols loaded from these modules.
*
* Sun Jun 15 16:23:29 MET DST 1997: Michael Alan Dorman
* Some more glibc patches made by <mdorman@debian.org>.
*
* Sat Jan 10 15:00:18 CET 1998: Martin Schulze <joey@infodrom.north.de>
* Fixed problem with klogd not being able to be built on a kernel
* newer than 2.1.18. It was caused by modified structures
* inside the kernel that were included. I have worked in a
* patch from Alessandro Suardi <asuardi@uninetcom.it>.
*
* Sun Jan 25 20:57:34 CET 1998: Martin Schulze <joey@infodrom.north.de>
* Another patch for Linux/alpha by Christopher C Chimelis
* <chris@classnet.med.miami.edu>.
*
* Thu Mar 19 23:39:29 CET 1998: Manuel Rodrigues <pmanuel@cindy.fe.up.pt>
* Changed lseek() to llseek() in order to support > 2GB address
* space which provided by kernels > 2.1.70.
*
* Mon Apr 13 18:18:45 CEST 1998: Martin Schulze <joey@infodrom.north.de>
* Removed <sys/module.h> as it's no longer part of recent glibc
* versions. Added prototyp for llseek() which has been
* forgotton in <unistd.h> from glibc. Added more log
* information if problems occurred while reading a system map
* file, by submission from Mark Simon Phillips <M.S.Phillips@nortel.co.uk>.
*
* Sun Jan 3 18:38:03 CET 1999: Martin Schulze <joey@infodrom.north.de>
* Corrected return value of AddModule if /dev/kmem can't be
* loaded. This will prevent klogd from segfaulting if /dev/kmem
* is not available. Patch from Topi Miettinen <tom@medialab.sonera.net>.
*
* Tue Sep 12 23:11:13 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
* Changed llseek() to lseek64() in order to skip a libc warning.
*
* Wed Mar 31 17:35:01 CEST 2004: Martin Schulze <joey@infodrom.org>
* Removed references to <linux/module.h> since it doesn't work
* anymore with its recent content from Linux 2.4/2.6, created
* module.h locally instead.
*
* Fri May 25 20:07:30 CEST 2007: Martin Schulze <joey@infodrom.org>
* Use new query_module function rather than the old obsolete
* hack of stepping through /dev/kmem.
*
* Mon May 28 16:46:59 CEST 2007: Martin Schulze <joey@infodrom.org>
* Since Linux 2.6 query_module is depricated and no implemented
* anymore. Thus, overhauled symbol import via /proc/kallsyms
*
* Thu May 31 12:12:23 CEST 2007: Martin Schulze <joey@infodrom.org>
* Only read kernel symbols from /proc/kallsyms if no System.map
* has been read as it may contain more symbols.
*
* Thu May 31 16:56:26 CEST 2007: Martin Schulze <joey@infodrom.org>
* Improved symbol lookup, since symbols are spread over the entire
* address space. Return the symbol that fits best instead of
* the first hit.
*/
#include "config.h"

3
src/ksyms.h
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@ -23,7 +23,6 @@
* MA 02110-1301, USA.
*/
/* Variables, structures and type definitions static to this module. */
struct symbol {
char *name;
@ -31,7 +30,5 @@ struct symbol {
int offset;
};
/* Function prototypes. */
extern char *LookupSymbol(unsigned long, struct symbol *);
extern char *LookupModuleSymbol(unsigned long int, struct symbol *);

14
src/module.h
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@ -23,20 +23,6 @@
* MA 02110-1301, USA.
*/
/* ChangeLog:
*
* Wed Mar 31 17:35:01 CEST 2004: Martin Schulze <joey@infodrom.org>
* Created local copy of module.h based on the content of Linux
* 2.2 since <linux/module.h> doesn't work anymore with its
* recent content from Linux 2.4/2.6.
*
* Thu May 25 09:14:33 CEST 2006: Martin Schulze <joey@infodrom.org>
* Removed asm/atomic.h since it is not needed anymore.
*
* Mon May 28 16:46:59 CEST 2007: Martin Schulze <joey@infodrom.org>
* Removed several structs not used anymore. Moved structs from
* ksym_mod.c over here.
*/
struct sym_table {
unsigned long value;

5
src/pidfile.c
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@ -22,11 +22,6 @@
* MA 02110-1301, USA.
*/
/*
* Sat Aug 19 13:24:33 MET DST 1995: Martin Schulze
* First version (v0.2) released
*/
#include <errno.h>
#include <fcntl.h>
#include <signal.h>

15
src/syslog_tst.c
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@ -1,20 +1,5 @@
/* Program to test daemon logging. */
/*
* Sat Dec 11 12:07:50 CST 1993: Dr. Wettstein
* Compiles clean with -Wall. Renamed for first public distribution.
* Use this freely but if you make a ton of money with it I
* expect a cut... :-)
*
* Thu Jan 6 11:52:10 CST 1994: Dr. Wettstein
* Added support for reading getting log input from the standard
* input. To activate this use a - as the single arguement to the
* the program. Note that there is a hack in the code to pause
* after each 1K has been written. This eliminates what appears
* to be a problem with overrunning a UNIX domain socket with
* excessive amounts of input.
*/
#include <stdio.h>
#include <string.h>
#include <sys/param.h>

473
src/syslogd.c
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@ -48,479 +48,6 @@ static char sccsid[] __attribute__((unused)) =
* 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 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.
* Thu Apr 13 05:08:10 CEST 2001: Jon Burgess <Jon_Burgess@eur.3com.com>
* Moved the installation of the signal handler up a little bit
* so it guaranteed to be available when the child is forked,
* hence, fixing a race condition. This used to create problems
* with UML and fast machines.
*
* Sat Apr 17 18:03:05 CEST 2004: Steve Grubb <linux_4ever@yahoo.com>
* Correct memory allocation for for commandline arguments in
* crunch_list().
*
* Thu Apr 29 12:38:39 CEST 2004: Solar Designer <solar@openwall.com>
* Applied Openwall paranoia patches to improve crunch_list().
*
* Tue May 4 16:47:30 CEST 2004: Solar Designer <solar@openwall.com>
* Ensure that "len" is not placed in a register, and that the
* endtty() signal handler is not installed too early which could
* cause a segmentation fault or worse.
*
* Tue May 4 16:52:01 CEST 2004: Solar Designer <solar@openwall.com>
* Adjust the size of a variable to prevent a buffer overflow
* should _PATH_DEV ever contain something different than "/dev/".
*
* Tue Nov 2 20:28:23 CET 2004: Colin Phipps <cph@cph.demon.co.uk>
* Don't block on the network socket, in case a packet gets lost
* between select and recv.
*
* Sun Nov 7 12:28:47 CET 2004: Martin Schulze <joey@infodrom.org>
* Discard any timestamp information found in received syslog
* messages. This will affect local messages sent from a
* different timezone.
*
* Sun Nov 7 13:47:00 CET 2004: Martin Schulze <joey@infodrom.org>
* Remove trailing newline when forwarding messages.
*
* Thu May 25 09:47:38 CEST 2006: Martin Schulze <joey@infodrom.org>
* Reset the 'restart' flag immediately after entering the
* restart code, so that subsequent SIGHUPs are able to set it
* again and cause a new restart. This fixes a race condition
* when somebody sends tons of HUP signals.
*
* Thu May 24 15:24:49 CEST 2007: Martin Schulze <joey@infodrom.org>
* Ignore errors caused by filled up disks so that the log
* continues to be written as soon as space becomes available
* again.
*
* Sat May 26 10:05:05 CEST 2007: Martin Schulze <joey@infodrom.org>
* Only try to gather the local domain name when messages are to
* be received from the network, it's not needed otherwise.
*
* Sat May 26 12:22:44 CEST 2007: Martin Schulze <joey@infodrom.org>
* Properly accompany the MARK message with the facility.
*
* Mon May 28 19:44:39 CEST 2007: Martin Schulze <joey@infodrom.org>
* Notify the waiting parent process if the client dies to it
* doesn't wait the entire five minutes.
*
* Wed Jul 4 21:02:22 CEST 2007: Martin Schulze <joey@infodrom.org>
* Open a pipe with O_NOCTTY to avoid them becoming the controlling
* tty and normal files with O_NONBLOCK to avoid blocking.
*
* Fri Oct 26 17:21:15 CEST 2007: Thomas Jarosch <thomas.jarosch@intra2net.com>
* Move hostname setting code from main() into init().
*
* Wed May 7 21:00:39 CEST 2007: Martin Schulze <joey@infodrom.org>
* Make sure that the service name is only queried, when it is needed,
* i.e. when we are sending to or receiving from the network.
*
* Sun Oct 11 11:28:07 CEST 2009: Joachim Nilsson <troglobit@gmail.com>
* Port log rotation from BusyBox syslogd. This adds -b and -c
* options for size and rotate count. Disabled by default.
*
* Fri Sep 10 08:29:04 CEST 2010: Martin Schulze <joey@infodrom.org>
* Replace strcpy with memmove to fix continuation line problems
* on 64bit architectures, patch by David Couture.
*/
#define MAXLINE 1024 /* maximum line length */