diff options
author | Rainer Gerhards <rgerhards@adiscon.com> | 2007-12-17 11:52:10 +0000 |
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committer | Rainer Gerhards <rgerhards@adiscon.com> | 2007-12-17 11:52:10 +0000 |
commit | 9088ee33893803cc47a69ba671ebfe10cc09c95b (patch) | |
tree | e0889ed5bb7dc349eff57d0af1a21c5a81c86218 | |
parent | 369b0ebd927545b9a9e4be211580ce6e0d77284d (diff) | |
download | rsyslog-9088ee33893803cc47a69ba671ebfe10cc09c95b.tar.gz rsyslog-9088ee33893803cc47a69ba671ebfe10cc09c95b.tar.xz rsyslog-9088ee33893803cc47a69ba671ebfe10cc09c95b.zip |
begun imklog, replacing klogd.c (finally we get rid of it...)
-rw-r--r-- | Makefile.am | 17 | ||||
-rw-r--r-- | configure.ac | 3 | ||||
-rw-r--r-- | klogd.c | 1201 | ||||
-rw-r--r-- | klogd.h | 45 | ||||
-rw-r--r-- | module-template.h | 7 | ||||
-rw-r--r-- | plugins/imklog/.cvsignore | 6 | ||||
-rw-r--r-- | plugins/imklog/Makefile.am | 8 | ||||
-rw-r--r-- | plugins/imklog/imklog.c | 753 | ||||
-rw-r--r-- | plugins/imklog/ksym.c (renamed from ksym.c) | 0 | ||||
-rw-r--r-- | plugins/imklog/ksym_mod.c (renamed from ksym_mod.c) | 0 | ||||
-rw-r--r-- | plugins/imklog/ksyms.h (renamed from ksyms.h) | 0 | ||||
-rw-r--r-- | plugins/imklog/module.h | 81 | ||||
-rw-r--r-- | plugins/immark/immark.c | 4 | ||||
-rw-r--r-- | syslog.c | 141 | ||||
-rw-r--r-- | syslogd.c | 2 | ||||
-rw-r--r-- | syslogd.h | 2 |
16 files changed, 864 insertions, 1406 deletions
diff --git a/Makefile.am b/Makefile.am index 7e738f18..c9053f24 100644 --- a/Makefile.am +++ b/Makefile.am @@ -1,15 +1,4 @@ -sbin_PROGRAMS = rklogd rfc3195d rsyslogd - -rklogd_SOURCES = \ - klogd.c \ - klogd.h \ - syslog.c \ - pidfile.c \ - pidfile.h \ - ksym.c \ - ksyms.h \ - ksym_mod.c \ - module.h +sbin_PROGRAMS = rfc3195d rsyslogd rfc3195d_SOURCES = rfc3195d.c rsyslog.h @@ -87,6 +76,10 @@ SUBDIRS = doc SUBDIRS += plugins/immark +if ENABLE_IMKLOGD +SUBDIRS += plugins/imklog +endif + if ENABLE_MYSQL SUBDIRS += plugins/ommysql endif diff --git a/configure.ac b/configure.ac index ef5353d9..2cf912ec 100644 --- a/configure.ac +++ b/configure.ac @@ -204,6 +204,7 @@ AC_ARG_ENABLE(klogd, if test "$enable_klogd" = "yes"; then AC_DEFINE(FEATURE_KLOGD, 1, [klogd functionality is integrated.]) fi +AM_CONDITIONAL(ENABLE_IMKLOGD, test x$enable_klogd = xyes) # # SYSLOG_UNIXAF @@ -348,7 +349,7 @@ AC_SUBST(pgsql_libs) -AC_CONFIG_FILES([Makefile doc/Makefile plugins/immark/Makefile plugins/ommysql/Makefile plugins/ompgsql/Makefile]) +AC_CONFIG_FILES([Makefile doc/Makefile plugins/immark/Makefile plugins/imklog/Makefile plugins/ommysql/Makefile plugins/ompgsql/Makefile]) AC_OUTPUT echo "****************************************************" diff --git a/klogd.c b/klogd.c deleted file mode 100644 index e2e9df21..00000000 --- a/klogd.c +++ /dev/null @@ -1,1201 +0,0 @@ -/* - klogd.c - main program for Linux kernel log daemon. - Copyright (c) 1995 Dr. G.W. Wettstein <greg@wind.rmcc.com> - * - * This file is part of rsyslog. - * - * Rsyslog is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * Rsyslog is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with Rsyslog. If not, see <http://www.gnu.org/licenses/>. - * - * A copy of the GPL can be found in the file "COPYING" in this distribution. -*/ -#include "config.h" - -#ifdef FEATURE_KLOGD -/* - * 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. - */ - - -/* Includes. */ -#include <unistd.h> -#include <signal.h> -#include <errno.h> -#include <sys/fcntl.h> -#include <sys/stat.h> -#if !defined(__GLIBC__) -#include <linux/time.h> -#endif /* __GLIBC__ */ -#include <stdarg.h> -#include <paths.h> -#include <stdlib.h> -#include "klogd.h" -#include "ksyms.h" -#ifndef TESTING -#include "pidfile.h" -#endif - -#define __LIBRARY__ -#include <linux/unistd.h> -#if !defined(__GLIBC__) -# define __NR_ksyslog __NR_syslog -_syscall3(int,ksyslog,int, type, char *, buf, int, len); -#else -#include <sys/klog.h> -#define ksyslog klogctl -#endif -extern int writeSyslogV(int pri, const char *szFmt, va_list va); -extern int writeSyslog(int iPri, const char *szFmt, ...); - -#ifndef _PATH_KLOG -#define _PATH_KLOG "/proc/kmsg" -#endif - -#define LOG_BUFFER_SIZE 4096 -#define LOG_LINE_LENGTH 1000 - -#ifndef TESTING -#if defined(FSSTND) -static char *PidFile = _PATH_VARRUN "rklogd.pid"; -#else -static char *PidFile = "/etc/rklogd.pid"; -#endif -#endif - -static int kmsg, - change_state = 0, - terminate = 0, - caught_TSTP = 0, - reload_symbols = 0, - console_log_level = -1; - -static int use_syscall = 0, - one_shot = 0, - symbol_lookup = 1, - no_fork = 0; /* don't fork - don't run in daemon mode */ - -static char *symfile = (char *) 0, - log_buffer[LOG_BUFFER_SIZE]; - -static FILE *output_file = (FILE *) 0; - -static enum LOGSRC {none, proc, kernel} logsrc; - -int debugging = 0; -int symbols_twice = 0; - - -/* Function prototypes. */ -extern int ksyslog(int type, char *buf, int len); -static void CloseLogSrc(void); -extern void restart(int sig); -extern void stop_logging(int sig); -extern void stop_daemon(int sig); -extern void reload_daemon(int sig); -static void Terminate(void); -static void SignalDaemon(int); -static void ReloadSymbols(void); -static void ChangeLogging(void); -static enum LOGSRC GetKernelLogSrc(void); -static void LogLine(char *ptr, int len); -static void LogKernelLine(void); -static void LogProcLine(void); -extern int main(int argc, char *argv[]); - - -extern void Syslog(int priority, char *fmt, ...) __attribute__((format(printf,2, 3))); -extern void Syslog(int priority, char *fmt, ...) -{ - va_list ap; - char *argl; - - if(debugging) - { - fputs("Logging line:\n", stderr); - fprintf(stderr, "\tLine: %s\n", fmt); - fprintf(stderr, "\tPriority: %d\n", priority); - } - - /* Handle output to a file. */ - if ( output_file != (FILE *) 0 ) { - va_start(ap, fmt); - vfprintf(output_file, fmt, ap); - va_end(ap); - fputc('\n', output_file); - fflush(output_file); - if (!one_shot) - fsync(fileno(output_file)); - return; - } - - /* Output using syslog. */ - if (!strcmp(fmt, "%s")) { - va_start(ap, fmt); - argl = va_arg(ap, char *); - if (argl[0] == '<' && argl[1] && argl[2] == '>') { - switch ( argl[1] ) - { - case '0': - priority = LOG_EMERG; - break; - case '1': - priority = LOG_ALERT; - break; - case '2': - priority = LOG_CRIT; - break; - case '3': - priority = LOG_ERR; - break; - case '4': - priority = LOG_WARNING; - break; - case '5': - priority = LOG_NOTICE; - break; - case '6': - priority = LOG_INFO; - break; - case '7': - default: - priority = LOG_DEBUG; - } - argl += 3; - } - writeSyslog(priority, fmt, argl); - va_end(ap); -#ifdef TESTING - putchar('\n'); -#endif - return; - } - - va_start(ap, fmt); - writeSyslogV(priority, fmt, ap); - va_end(ap); -#ifdef TESTING - printf ("\n"); -#endif - - return; -} - - -static void CloseLogSrc(void) -{ - /* Turn on logging of messages to console, but only if we had the -c - * option -- rgerhards, 2007-08-01 - */ - if (console_log_level != -1) - ksyslog(7, NULL, 0); - - /* Shutdown the log sources. */ - switch ( logsrc ) - { - case kernel: - ksyslog(0, 0, 0); - Syslog(LOG_INFO, "Kernel logging (ksyslog) stopped."); - break; - case proc: - close(kmsg); - Syslog(LOG_INFO, "Kernel logging (proc) stopped."); - break; - case none: - break; - } - - if ( output_file != (FILE *) 0 ) - fflush(output_file); - return; -} - - -void restart(int __attribute__((unused)) sig) -{ - change_state = 1; - caught_TSTP = 0; - return; -} - - -void stop_logging(int __attribute__((unused)) sig) -{ - change_state = 1; - caught_TSTP = 1; - return; -} - - -void stop_daemon(int __attribute__((unused)) sig) -{ - change_state = 1; - terminate = 1; - return; -} - - -void reload_daemon(int sig) -{ - change_state = 1; - reload_symbols = 1; - - if ( sig == SIGUSR2 ) - { - ++reload_symbols; - } - - return; -} - - -static void Terminate(void) -{ - CloseLogSrc(); - Syslog(LOG_INFO, "Kernel log daemon terminating."); - sleep(1); - if ( output_file != (FILE *) 0 ) - fclose(output_file); - closelog(); -#ifndef TESTING - (void) remove_pid(PidFile); -#endif - exit(1); -} - -static void SignalDaemon(int sig) -{ -#ifndef TESTING - auto int pid = check_pid(PidFile); - - kill(pid, sig); -#else - kill(getpid(), sig); -#endif - return; -} - - -static void ReloadSymbols(void) -{ - if (symbol_lookup) { - if ( reload_symbols > 1 ) - InitKsyms(symfile); - InitMsyms(); - } - reload_symbols = change_state = 0; - return; -} - - -static void ChangeLogging(void) -{ - /* Terminate kernel logging. */ - if ( terminate == 1 ) - Terminate(); - - /* Indicate that something is happening. */ - Syslog(LOG_INFO, "rklogd %s, ---------- state change ----------\n", \ - VERSION); - - /* Reload symbols. */ - if ( reload_symbols > 0 ) - { - ReloadSymbols(); - return; - } - - /* Stop kernel logging. */ - if ( caught_TSTP == 1 ) - { - CloseLogSrc(); - logsrc = none; - change_state = 0; - return; - } - - /* - * The rest of this function is responsible for restarting - * kernel logging after it was stopped. - * - * In the following section we make a decision based on the - * kernel log state as to what is causing us to restart. Somewhat - * groady but it keeps us from creating another static variable. - */ - if ( logsrc != none ) - { - Syslog(LOG_INFO, "Kernel logging re-started after SIGSTOP."); - change_state = 0; - return; - } - - /* Restart logging. */ - logsrc = GetKernelLogSrc(); - change_state = 0; - return; -} - - -static enum LOGSRC GetKernelLogSrc(void) -{ - auto struct stat sb; - - /* Set level of kernel console messaging.. */ - if ( (console_log_level != -1) && - (ksyslog(8, NULL, console_log_level) < 0) && - (errno == EINVAL) ) - { - /* - * An invalid arguement error probably indicates that - * a pre-0.14 kernel is being run. At this point we - * issue an error message and simply shut-off console - * logging completely. - */ - Syslog(LOG_WARNING, "Cannot set console log level - disabling " - "console output."); - } - - /* - * First do a stat to determine whether or not the proc based - * file system is available to get kernel messages from. - */ - if ( use_syscall || - ((stat(_PATH_KLOG, &sb) < 0) && (errno == ENOENT)) ) - { - /* Initialize kernel logging. */ - ksyslog(1, NULL, 0); -#ifdef DEBRELEASE - Syslog(LOG_INFO, "rklogd %s#%s, log source = ksyslog " - "started.", VERSION, DEBRELEASE); -#else - Syslog(LOG_INFO, "rklogd %s, log source = ksyslog " - "started.", VERSION); -#endif - return(kernel); - } - -#ifndef TESTING - if ( (kmsg = open(_PATH_KLOG, O_RDONLY)) < 0 ) - { - fprintf(stderr, "rklogd: Cannot open proc file system, " \ - "%d - %s.\n", errno, strerror(errno)); - ksyslog(7, NULL, 0); - exit(1); - } -#else - kmsg = fileno(stdin); -#endif - -#ifdef DEBRELEASE - Syslog(LOG_INFO, "rklogd %ss#%s, log source = %s started.", \ - VERSION, DEBRELEASE, _PATH_KLOG); -#else - Syslog(LOG_INFO, "rklogd %s, log source = %s started.", \ - VERSION, _PATH_KLOG); -#endif - return(proc); -} - - -/* - * Copy characters from ptr to line until a char in the delim - * string is encountered or until min( space, len ) chars have - * been copied. - * - * Returns the actual number of chars copied. - */ -static int copyin( char *line, int space, - const char *ptr, int len, - const char *delim ) -{ - auto int i; - auto int count; - - count = len < space ? len : space; - - for(i=0; i<count && !strchr(delim, *ptr); i++ ) { - *line++ = *ptr++; - } - - return( i ); -} - -/* - * Messages are separated by "\n". Messages longer than - * LOG_LINE_LENGTH are broken up. - * - * Kernel symbols show up in the input buffer as : "[<aaaaaa>]", - * where "aaaaaa" is the address. These are replaced with - * "[symbolname+offset/size]" in the output line - symbolname, - * offset, and size come from the kernel symbol table. - * - * If a kernel symbol happens to fall at the end of a message close - * in length to LOG_LINE_LENGTH, the symbol will not be expanded. - * (This should never happen, since the kernel should never generate - * messages that long. - * - * To preserve the original addresses, lines containing kernel symbols - * are output twice. Once with the symbols converted and again with the - * original text. Just in case somebody wants to run their own Oops - * analysis on the syslog, e.g. ksymoops. - */ -static void LogLine(char *ptr, int len) -{ - enum parse_state_enum { - PARSING_TEXT, - PARSING_SYMSTART, /* at < */ - PARSING_SYMBOL, - PARSING_SYMEND /* at ] */ - }; - - static char line_buff[LOG_LINE_LENGTH]; - - static char *line =line_buff; - static enum parse_state_enum parse_state = PARSING_TEXT; - static int space = sizeof(line_buff)-1; - - static char *sym_start; /* points at the '<' of a symbol */ - - auto int delta = 0; /* number of chars copied */ - auto int symbols_expanded = 0; /* 1 if symbols were expanded */ - auto int skip_symbol_lookup = 0; /* skip symbol lookup on this pass */ - auto char *save_ptr = ptr; /* save start of input line */ - auto int save_len = len; /* save length at start of input line */ - - while( len > 0 ) - { - if( space == 0 ) /* line buffer is full */ - { - /* - ** Line too long. Start a new line. - */ - *line = 0; /* force null terminator */ - - if ( debugging ) - { - fputs("Line buffer full:\n", stderr); - fprintf(stderr, "\tLine: %s\n", line); - } - - Syslog( LOG_INFO, "%s", line_buff ); - line = line_buff; - space = sizeof(line_buff)-1; - parse_state = PARSING_TEXT; - symbols_expanded = 0; - skip_symbol_lookup = 0; - save_ptr = ptr; - save_len = len; - } - - switch( parse_state ) - { - case PARSING_TEXT: - delta = copyin( line, space, ptr, len, "\n[" ); - line += delta; - ptr += delta; - space -= delta; - len -= delta; - - if( space == 0 || len == 0 ) - { - break; /* full line_buff or end of input buffer */ - } - - if( *ptr == '\0' ) /* zero byte */ - { - ptr++; /* skip zero byte */ - space -= 1; - len -= 1; - - break; - } - - if( *ptr == '\n' ) /* newline */ - { - ptr++; /* skip newline */ - space -= 1; - len -= 1; - - *line = 0; /* force null terminator */ - Syslog( LOG_INFO, "%s", line_buff ); - line = line_buff; - space = sizeof(line_buff)-1; - if (symbols_twice) { - if (symbols_expanded) { - /* reprint this line without symbol lookup */ - symbols_expanded = 0; - skip_symbol_lookup = 1; - ptr = save_ptr; - len = save_len; - } - else - { - skip_symbol_lookup = 0; - save_ptr = ptr; - save_len = len; - } - } - break; - } - if( *ptr == '[' ) /* possible kernel symbol */ - { - *line++ = *ptr++; - space -= 1; - len -= 1; - if (!skip_symbol_lookup) - parse_state = PARSING_SYMSTART; /* at < */ - break; - } - /* Now that line_buff is no longer fed to *printf as format - * string, '%'s are no longer "dangerous". - */ - break; - - case PARSING_SYMSTART: - if( *ptr != '<' ) - { - parse_state = PARSING_TEXT; /* not a symbol */ - break; - } - - /* - ** Save this character for now. If this turns out to - ** be a valid symbol, this char will be replaced later. - ** If not, we'll just leave it there. - */ - - sym_start = line; /* this will point at the '<' */ - - *line++ = *ptr++; - space -= 1; - len -= 1; - parse_state = PARSING_SYMBOL; /* symbol... */ - break; - - case PARSING_SYMBOL: - delta = copyin( line, space, ptr, len, ">\n[" ); - line += delta; - ptr += delta; - space -= delta; - len -= delta; - if( space == 0 || len == 0 ) - { - break; /* full line_buff or end of input buffer */ - } - if( *ptr != '>' ) - { - parse_state = PARSING_TEXT; - break; - } - - *line++ = *ptr++; /* copy the '>' */ - space -= 1; - len -= 1; - - parse_state = PARSING_SYMEND; - - break; - - case PARSING_SYMEND: - if( *ptr != ']' ) - { - parse_state = PARSING_TEXT; /* not a symbol */ - break; - } - - /* - ** It's really a symbol! Replace address with the - ** symbol text. - */ - { - auto int sym_space; - - unsigned long value; - auto struct symbol sym; - auto char *symbol; - - *(line-1) = 0; /* null terminate the address string */ - value = strtoul(sym_start+1, (char **) 0, 16); - *(line-1) = '>'; /* put back delim */ - - if ( !symbol_lookup || (symbol = LookupSymbol(value, &sym)) == (char *)0 ) - { - parse_state = PARSING_TEXT; - break; - } - - /* - ** verify there is room in the line buffer - */ - sym_space = space + ( line - sym_start ); - if( (unsigned) sym_space < strlen(symbol) + 30 ) /*(30 should be overkill)*/ - { - parse_state = PARSING_TEXT; /* not enough space */ - break; - } - - delta = sprintf( sym_start, "%s+%d/%d]", - symbol, sym.offset, sym.size ); - - space = sym_space + delta; - line = sym_start + delta; - symbols_expanded = 1; - } - ptr++; - len--; - parse_state = PARSING_TEXT; - break; - - default: /* Can't get here! */ - parse_state = PARSING_TEXT; - - } - } - - return; -} - - -static void LogKernelLine(void) -{ - auto int rdcnt; - - /* - * Zero-fill the log buffer. This should cure a multitude of - * problems with klogd logging the tail end of the message buffer - * which will contain old messages. Then read the kernel log - * messages into this fresh buffer. - */ - memset(log_buffer, '\0', sizeof(log_buffer)); - if ( (rdcnt = ksyslog(2, log_buffer, sizeof(log_buffer)-1)) < 0 ) - { - if ( errno == EINTR ) - return; - fprintf(stderr, "rklogd: Error return from sys_sycall: " \ - "%d - %s\n", errno, strerror(errno)); - } - else - LogLine(log_buffer, rdcnt); - return; -} - - -static void LogProcLine(void) -{ - auto int rdcnt; - - /* - * Zero-fill the log buffer. This should cure a multitude of - * problems with klogd logging the tail end of the message buffer - * which will contain old messages. Then read the kernel messages - * from the message pseudo-file into this fresh buffer. - */ - memset(log_buffer, '\0', sizeof(log_buffer)); - if ( (rdcnt = read(kmsg, log_buffer, sizeof(log_buffer)-1)) < 0 ) - { - if ( errno == EINTR ) - return; - Syslog(LOG_ERR, "Cannot read proc file system: %d - %s.", \ - errno, strerror(errno)); - } - else - LogLine(log_buffer, rdcnt); - - return; -} - - -/* helper routine to spit out an error message and terminate - * klogd when setting a signal error fails. - */ -void sigactionErrAbort() -{ - fprintf(stderr, "rklogd: could net set a signal handler - terminating. Error: %s\n", - strerror(errno)); - exit(1); -} - - -int main(int argc, char *argv[]) -{ - int ch, - use_output = 0; - - char *log_level = (char *) 0, - *output = (char *) 0; - struct sigaction sigAct; - -#ifndef TESTING - chdir ("/"); -#endif - /* Parse the command-line. */ - while ((ch = getopt(argc, argv, "c:df:iIk:nopsvx2")) != EOF) - switch((char)ch) - { - case '2': /* Print lines with symbols twice. */ - symbols_twice = 1; - break; - case 'c': /* Set console message level. */ - log_level = optarg; - break; - case 'd': /* Activity debug mode. */ - debugging = 1; - break; - case 'f': /* Define an output file. */ - output = optarg; - use_output++; - break; - case 'i': /* Reload module symbols. */ - SignalDaemon(SIGUSR1); - return(0); - case 'I': - SignalDaemon(SIGUSR2); - return(0); - case 'k': /* Kernel symbol file. */ - symfile = optarg; - break; - case 'n': /* don't fork */ - no_fork++; - break; - case 'o': /* One-shot mode. */ - one_shot = 1; - break; - case 'p': - SetParanoiaLevel(1); /* Load symbols on oops. */ - break; - case 's': /* Use syscall interface. */ - use_syscall = 1; - break; - case 'v': - printf("rklogd %s\n", VERSION); - exit (1); - case 'x': - symbol_lookup = 0; - break; - } - - - /* Set console logging level. */ - if ( log_level != (char *) 0 ) - { - if ( (strlen(log_level) > 1) || \ - (strchr("12345678", *log_level) == (char *) 0) ) - { - fprintf(stderr, "rklogd: Invalid console logging " - "level <%s> specified.\n", log_level); - return(1); - } - console_log_level = *log_level - '0'; - } - - -#ifndef TESTING - /* - * The following code allows klogd to auto-background itself. - * What happens is that the program forks and the parent quits. - * The child closes all its open file descriptors, and issues a - * call to setsid to establish itself as an independent session - * immune from control signals. - * - * fork() is only called if it should run in daemon mode, fork is - * not disabled with the command line argument and there's no - * such process running. - */ - if ( (!one_shot) && (!no_fork) ) - { - if (!check_pid(PidFile)) - { - if ( fork() == 0 ) - { - auto int fl; - int num_fds = getdtablesize(); - - /* This is the child closing its file descriptors. */ - for (fl= 0; fl <= num_fds; ++fl) - { - if ( fileno(stdout) == fl && use_output ) - if ( strcmp(output, "-") == 0 ) - continue; - close(fl); - } - - setsid(); - } - else - exit(0); - } - else - { - fputs("rklogd: Already running.\n", stderr); - exit(1); - } - } - - - /* tuck my process id away */ - if (!check_pid(PidFile)) - { - if (!write_pid(PidFile)) - Terminate(); - } - else - { - fputs("rklogd: Already running.\n", stderr); - Terminate(); - } -#endif - - /* Signal setups. - * Please note that the "original" klogd in sysklogd tries to - * handle SIGKILL and SIGSTOP. That does not work - but as the - * original klogd had no error checking, nobody ever noticed. We - * do now have error checking and consequently those ever-failing - * calls are now removed. - */ - sigemptyset(&sigAct.sa_mask); - sigAct.sa_flags = 0; - - /* first, set all signals to ignore - * In this loop, we try blindly to ignore all signals. I am leaving - * intentionally out all error checking. If we can ignore the signal, - * that's nice, but if we can't ... well, so be it ;) - * RGerhards, 2007-06-15 - */ - sigAct.sa_handler = SIG_IGN; - for (ch= 1; ch < NSIG ; ++ch) - { - if(ch != SIGKILL && ch != SIGSTOP) - sigaction(ch, &sigAct, NULL); - } - - /* Now specific handlers (one after another) */ - sigAct.sa_handler = stop_daemon; - if(sigaction(SIGINT, &sigAct, NULL) != 0) sigactionErrAbort(); - if(sigaction(SIGTERM, &sigAct, NULL) != 0) sigactionErrAbort(); - if(sigaction(SIGHUP, &sigAct, NULL) != 0) sigactionErrAbort(); - - sigAct.sa_handler = stop_daemon; - if(sigaction(SIGTSTP, &sigAct, NULL) != 0) sigactionErrAbort(); - - sigAct.sa_handler = restart; - if(sigaction(SIGCONT, &sigAct, NULL) != 0) sigactionErrAbort(); - - sigAct.sa_handler = reload_daemon; - if(sigaction(SIGUSR1, &sigAct, NULL) != 0) sigactionErrAbort(); - if(sigaction(SIGUSR2, &sigAct, NULL) != 0) sigactionErrAbort(); - - - /* Open outputs. */ - if ( use_output ) - { - if ( strcmp(output, "-") == 0 ) - output_file = stdout; - else if ( (output_file = fopen(output, "w")) == (FILE *) 0 ) - { - fprintf(stderr, "rklogd: Cannot open output file " \ - "%s - %s\n", output, strerror(errno)); - return(1); - } - } - - /* Handle one-shot logging. */ - if ( one_shot ) - { - if (symbol_lookup) { - symbol_lookup = (InitKsyms(symfile) == 1); - symbol_lookup |= InitMsyms(); - if (symbol_lookup == 0) { - Syslog(LOG_WARNING, "cannot find any symbols, turning off symbol lookups\n"); - } - } - if ( (logsrc = GetKernelLogSrc()) == kernel ) - LogKernelLine(); - else - LogProcLine(); - Terminate(); - } - - /* Determine where kernel logging information is to come from. */ -#if defined(KLOGD_DELAY) - sleep(KLOGD_DELAY); -#endif - logsrc = GetKernelLogSrc(); - if (symbol_lookup) { - symbol_lookup = (InitKsyms(symfile) == 1); - symbol_lookup |= InitMsyms(); - if (symbol_lookup == 0) { - Syslog(LOG_WARNING, "cannot find any symbols, turning off symbol lookups\n"); - } - } - - /* The main loop. */ - /* The main loop will be broken by a signal handler which set the - * terminate variable. That is then cheked in ChangeLogging(), which - * will then terminate klogd. - * RGerhards, 2007-06-15 - */ - while(1) - { - if ( change_state ) - ChangeLogging(); - switch ( logsrc ) - { - case kernel: - LogKernelLine(); - break; - case proc: - LogProcLine(); - break; - case none: - pause(); - break; - } - } -} -#else /* #ifdef FEATURE_KLOGD */ -#include <stdio.h> -int main() -{ - fprintf(stderr, "FEATURE_KLOGD was disabled during make, so rklogd is not available.\n"); - return(1); -} -#endif /* #ifdef WITH_KLOGD */ -/* - * Local variables: - * c-indent-level: 8 - * c-basic-offset: 8 - * tab-width: 8 - * End: - * vi:set ai: - */ diff --git a/klogd.h b/klogd.h deleted file mode 100644 index b9261caf..00000000 --- a/klogd.h +++ /dev/null @@ -1,45 +0,0 @@ -/* - klogd.h - main header file for Linux kernel log daemon. - Copyright (c) 1995 Dr. G.W. Wettstein <greg@wind.rmcc.com> - - * This file is part of rsyslog. - * - * Rsyslog is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * Rsyslog is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with Rsyslog. If not, see <http://www.gnu.org/licenses/>. - * - * A copy of the GPL can be found in the file "COPYING" in this distribution. -*/ - -/* - * 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> -#include <stdarg.h> -#undef syslog -#undef vsyslog - -/* Function prototypes. */ -extern int InitKsyms(char *); -extern int InitMsyms(void); -extern char * ExpandKadds(char *, char *); -extern void SetParanoiaLevel(int); -extern void Syslog(int priority, char *fmt, ...); -extern void vsyslog(int pri, const char *fmt, va_list ap); -extern void openlog(const char *ident, int logstat, int logfac); diff --git a/module-template.h b/module-template.h index 4dbb5a2c..96af4d83 100644 --- a/module-template.h +++ b/module-template.h @@ -32,8 +32,13 @@ /* macro to define standard output-module static data members */ -#define DEF_OMOD_STATIC_DATA \ +#define DEF_MOD_STATIC_DATA \ static rsRetVal (*omsdRegCFSLineHdlr)(); +#define DEF_OMOD_STATIC_DATA \ + DEF_MOD_STATIC_DATA +#define DEF_IMOD_STATIC_DATA \ + DEF_MOD_STATIC_DATA + /* Macro to define the module type. Each module can only have a single type. If * a module provides multiple types, several separate modules must be created which diff --git a/plugins/imklog/.cvsignore b/plugins/imklog/.cvsignore new file mode 100644 index 00000000..f43c5593 --- /dev/null +++ b/plugins/imklog/.cvsignore @@ -0,0 +1,6 @@ +.deps +.libs +Makefile +Makefile.in +imklog.la +immklog-ommysql.lo diff --git a/plugins/imklog/Makefile.am b/plugins/imklog/Makefile.am new file mode 100644 index 00000000..23530758 --- /dev/null +++ b/plugins/imklog/Makefile.am @@ -0,0 +1,8 @@ +pkglib_LTLIBRARIES = imklog.la + +imklog_la_SOURCES = imklog.c module.h ksym.c ksyms.h ksym_mod.c ../../module-template.h +imklog_la_CPPFLAGS = -I$(srcdir)/../.. $(pthreads_cflags) +imklog_la_LDFLAGS = -module -avoid-version +imklog_la_LIBADD = + +EXTRA_DIST = diff --git a/plugins/imklog/imklog.c b/plugins/imklog/imklog.c new file mode 100644 index 00000000..a6e2a856 --- /dev/null +++ b/plugins/imklog/imklog.c @@ -0,0 +1,753 @@ +/* The kernel log input module for Linux. This file heavily + * borrows from the klogd daemon provided by the sysklogd project. + * Many thanks for this piece of software. + * + * Please note that this file replaces the klogd daemon that was + * also present in pre-v3 versions of rsyslog. + * + * I have begun to convert this to an input module on 2007-12-17. + * IMPORTANT: more than a single instance is currently not supported. This + * needs to be revisited once the config file and input module interface + * supports multiple instances! + * + * This file is part of rsyslog. + * + * Rsyslog is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * Rsyslog is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with Rsyslog. If not, see <http://www.gnu.org/licenses/>. + * + * A copy of the GPL can be found in the file "COPYING" in this distribution. +*/ +#include "config.h" +#include "rsyslog.h" +#include <stdlib.h> +#include <stdio.h> +#include <assert.h> +#include <signal.h> +#include <string.h> +#include <pthread.h> +#include "syslogd.h" +#include "cfsysline.h" +#include "template.h" +#include "msg.h" +#include "module-template.h" + +MODULE_TYPE_INPUT +TERM_SYNC_TYPE(eTermSync_SIGNAL) + +/* defines */ +#define DEFAULT_MARK_PERIOD (20 * 60) + +/* Module static data */ +DEF_IMOD_STATIC_DATA +typedef struct _instanceData { +} instanceData; + + +/* Includes. */ +#include <unistd.h> +#include <errno.h> +#include <sys/fcntl.h> +#include <sys/stat.h> +#if !defined(__GLIBC__) +#include <linux/time.h> +#endif /* __GLIBC__ */ +#include <stdarg.h> +#include <paths.h> +#include "ksyms.h" + +#define __LIBRARY__ +#include <linux/unistd.h> +#if !defined(__GLIBC__) +# define __NR_ksyslog __NR_syslog +_syscall3(int,ksyslog,int, type, char *, buf, int, len); +#else +#include <sys/klog.h> +#define ksyslog klogctl +#endif + +#ifndef _PATH_KLOG +#define _PATH_KLOG "/proc/kmsg" +#endif + +#define LOG_BUFFER_SIZE 4096 +#define LOG_LINE_LENGTH 1000 + +static int kmsg, + console_log_level = -1; + +static int use_syscall = 0, + symbol_lookup = 1; + +static char *symfile = (char *) 0, + log_buffer[LOG_BUFFER_SIZE]; + +static enum LOGSRC {none, proc, kernel} logsrc; + +int debugging = 0; +int symbols_twice = 0; + + +/* Function prototypes. */ +extern int ksyslog(int type, char *buf, int len); +static enum LOGSRC GetKernelLogSrc(void); +static void LogLine(char *ptr, int len); +static void LogKernelLine(void); +static void LogProcLine(void); + + + +/* Write a message to the message queue. + * returns -1 if it fails, something else otherwise + */ +static rsRetVal writeSyslogV(int iPRI, const char *szFmt, va_list va)// __attribute__((format(printf,2, 3))); +{ + DEFiRet; + int iChars; + int iLen; + time_t tNow; + char msgBuf[2048]; /* we use the same size as sysklogd to remain compatible */ + msg_t *pMsg; + + assert(szFmt != NULL); + + /* build the message */ + time(&tNow); + /* we can use sprintf safely below, because we know the size of the constants. + * By doing so, we save some cpu cycles and code complexity (for unnecessary + * error checking). + */ + iLen = sprintf(msgBuf, "<%d>%.15s kernel: ", iPRI, ctime(&tNow) + 4); + + iChars = vsnprintf(msgBuf + iLen, sizeof(msgBuf) / sizeof(char) - iLen, szFmt, va); + + /* here we must create our message object and supply it to the message queue + */ + if((pMsg = MsgConstruct()) == NULL){ + /* There is not much we can do in this case - we discard the message + * then. + */ + dbgprintf("Memory shortage in imklogd: could not construct Msg object.\n"); + return RS_RET_OUT_OF_MEMORY; + } + +dbgprintf("klogd logging Raw: '%s',\nmsg: '%s'\n", msgBuf, msgBuf + iLen); + MsgSetUxTradMsg(pMsg, msgBuf); + MsgSetRawMsg(pMsg, msgBuf); + MsgSetMSG(pMsg, (msgBuf + iLen)); + MsgSetHOSTNAME(pMsg, LocalHostName); + MsgSetTAG(pMsg, "kernel:"); + pMsg->iFacility = LOG_FAC(LOG_KERN); + pMsg->iSeverity = LOG_PRI(iPRI); + pMsg->bParseHOSTNAME = 0; + getCurrTime(&(pMsg->tTIMESTAMP)); /* use the current time! */ + + /* provide message to the queue engine */ + logmsg(iPRI, pMsg, INTERNAL_MSG); + + return iRet; +} + +/* And now the same with variable arguments */ +static int writeSyslog(int iPRI, const char *szFmt, ...) +{ + int iRet; + va_list va; + + assert(szFmt != NULL); + va_start(va, szFmt); + iRet = writeSyslogV(iPRI, szFmt, va); + va_end(va); + + return(iRet); +} + +rsRetVal Syslog(int priority, char *fmt, ...) __attribute__((format(printf,2, 3))); +rsRetVal Syslog(int priority, char *fmt, ...) +{ + DEFiRet; + va_list ap; + char *argl; + + /* Output using syslog. */ + if (!strcmp(fmt, "%s")) { + va_start(ap, fmt); + argl = va_arg(ap, char *); + if (argl[0] == '<' && argl[1] && argl[2] == '>') { + switch ( argl[1] ) + { + case '0': + priority = LOG_EMERG; + break; + case '1': + priority = LOG_ALERT; + break; + case '2': + priority = LOG_CRIT; + break; + case '3': + priority = LOG_ERR; + break; + case '4': + priority = LOG_WARNING; + break; + case '5': + priority = LOG_NOTICE; + break; + case '6': + priority = LOG_INFO; + break; + case '7': + default: + priority = LOG_DEBUG; + } + argl += 3; + } + iRet = writeSyslog(priority, fmt, argl); + va_end(ap); + } else { + va_start(ap, fmt); + iRet = writeSyslogV(priority, fmt, ap); + va_end(ap); + } + + return iRet; +} + + +static void CloseLogSrc(void) +{ + /* Turn on logging of messages to console, but only if we had the -c + * option -- rgerhards, 2007-08-01 + */ + if (console_log_level != -1) + ksyslog(7, NULL, 0); + + /* Shutdown the log sources. */ + switch ( logsrc ) + { + case kernel: + ksyslog(0, 0, 0); + Syslog(LOG_INFO, "Kernel logging (ksyslog) stopped."); + break; + case proc: + close(kmsg); + Syslog(LOG_INFO, "Kernel logging (proc) stopped."); + break; + case none: + break; + } + + return; +} + + +static enum LOGSRC GetKernelLogSrc(void) +{ + auto struct stat sb; + + /* Set level of kernel console messaging.. */ + if ( (console_log_level != -1) && + (ksyslog(8, NULL, console_log_level) < 0) && + (errno == EINVAL) ) + { + /* + * An invalid arguement error probably indicates that + * a pre-0.14 kernel is being run. At this point we + * issue an error message and simply shut-off console + * logging completely. + */ + Syslog(LOG_WARNING, "Cannot set console log level - disabling " + "console output."); + } + + /* + * First do a stat to determine whether or not the proc based + * file system is available to get kernel messages from. + */ + if ( use_syscall || + ((stat(_PATH_KLOG, &sb) < 0) && (errno == ENOENT)) ) + { + /* Initialize kernel logging. */ + ksyslog(1, NULL, 0); + Syslog(LOG_INFO, "imklogd %s, log source = ksyslog " + "started.", VERSION); + return(kernel); + } + + if ( (kmsg = open(_PATH_KLOG, O_RDONLY)) < 0 ) + { + fprintf(stderr, "rklogd: Cannot open proc file system, " \ + "%d - %s.\n", errno, strerror(errno)); + ksyslog(7, NULL, 0); + exit(1); + } + + Syslog(LOG_INFO, "imklog %s, log source = %s started.", \ + VERSION, _PATH_KLOG); + return(proc); +} + + +/* Copy characters from ptr to line until a char in the delim + * string is encountered or until min( space, len ) chars have + * been copied. + * + * Returns the actual number of chars copied. + */ +static int copyin( char *line, int space, + const char *ptr, int len, + const char *delim ) +{ + auto int i; + auto int count; + + count = len < space ? len : space; + + for(i=0; i<count && !strchr(delim, *ptr); i++ ) { + *line++ = *ptr++; + } + + return( i ); +} + +/* + * Messages are separated by "\n". Messages longer than + * LOG_LINE_LENGTH are broken up. + * + * Kernel symbols show up in the input buffer as : "[<aaaaaa>]", + * where "aaaaaa" is the address. These are replaced with + * "[symbolname+offset/size]" in the output line - symbolname, + * offset, and size come from the kernel symbol table. + * + * If a kernel symbol happens to fall at the end of a message close + * in length to LOG_LINE_LENGTH, the symbol will not be expanded. + * (This should never happen, since the kernel should never generate + * messages that long. + * + * To preserve the original addresses, lines containing kernel symbols + * are output twice. Once with the symbols converted and again with the + * original text. Just in case somebody wants to run their own Oops + * analysis on the syslog, e.g. ksymoops. + */ +static void LogLine(char *ptr, int len) +{ + enum parse_state_enum { + PARSING_TEXT, + PARSING_SYMSTART, /* at < */ + PARSING_SYMBOL, + PARSING_SYMEND /* at ] */ + }; + + static char line_buff[LOG_LINE_LENGTH]; + + static char *line =line_buff; + static enum parse_state_enum parse_state = PARSING_TEXT; + static int space = sizeof(line_buff)-1; + + static char *sym_start; /* points at the '<' of a symbol */ + + auto int delta = 0; /* number of chars copied */ + auto int symbols_expanded = 0; /* 1 if symbols were expanded */ + auto int skip_symbol_lookup = 0; /* skip symbol lookup on this pass */ + auto char *save_ptr = ptr; /* save start of input line */ + auto int save_len = len; /* save length at start of input line */ + + while( len > 0 ) + { + if( space == 0 ) /* line buffer is full */ + { + /* + ** Line too long. Start a new line. + */ + *line = 0; /* force null terminator */ + + if ( debugging ) + { + fputs("Line buffer full:\n", stderr); + fprintf(stderr, "\tLine: %s\n", line); + } + + Syslog( LOG_INFO, "%s", line_buff ); + line = line_buff; + space = sizeof(line_buff)-1; + parse_state = PARSING_TEXT; + symbols_expanded = 0; + skip_symbol_lookup = 0; + save_ptr = ptr; + save_len = len; + } + + switch( parse_state ) + { + case PARSING_TEXT: + delta = copyin( line, space, ptr, len, "\n[" ); + line += delta; + ptr += delta; + space -= delta; + len -= delta; + + if( space == 0 || len == 0 ) + { + break; /* full line_buff or end of input buffer */ + } + + if( *ptr == '\0' ) /* zero byte */ + { + ptr++; /* skip zero byte */ + space -= 1; + len -= 1; + + break; + } + + if( *ptr == '\n' ) /* newline */ + { + ptr++; /* skip newline */ + space -= 1; + len -= 1; + + *line = 0; /* force null terminator */ + Syslog( LOG_INFO, "%s", line_buff ); + line = line_buff; + space = sizeof(line_buff)-1; + if (symbols_twice) { + if (symbols_expanded) { + /* reprint this line without symbol lookup */ + symbols_expanded = 0; + skip_symbol_lookup = 1; + ptr = save_ptr; + len = save_len; + } + else + { + skip_symbol_lookup = 0; + save_ptr = ptr; + save_len = len; + } + } + break; + } + if( *ptr == '[' ) /* possible kernel symbol */ + { + *line++ = *ptr++; + space -= 1; + len -= 1; + if (!skip_symbol_lookup) + parse_state = PARSING_SYMSTART; /* at < */ + break; + } + /* Now that line_buff is no longer fed to *printf as format + * string, '%'s are no longer "dangerous". + */ + break; + + case PARSING_SYMSTART: + if( *ptr != '<' ) + { + parse_state = PARSING_TEXT; /* not a symbol */ + break; + } + + /* + ** Save this character for now. If this turns out to + ** be a valid symbol, this char will be replaced later. + ** If not, we'll just leave it there. + */ + + sym_start = line; /* this will point at the '<' */ + + *line++ = *ptr++; + space -= 1; + len -= 1; + parse_state = PARSING_SYMBOL; /* symbol... */ + break; + + case PARSING_SYMBOL: + delta = copyin( line, space, ptr, len, ">\n[" ); + line += delta; + ptr += delta; + space -= delta; + len -= delta; + if( space == 0 || len == 0 ) + { + break; /* full line_buff or end of input buffer */ + } + if( *ptr != '>' ) + { + parse_state = PARSING_TEXT; + break; + } + + *line++ = *ptr++; /* copy the '>' */ + space -= 1; + len -= 1; + + parse_state = PARSING_SYMEND; + + break; + + case PARSING_SYMEND: + if( *ptr != ']' ) + { + parse_state = PARSING_TEXT; /* not a symbol */ + break; + } + + /* + ** It's really a symbol! Replace address with the + ** symbol text. + */ + { + auto int sym_space; + + unsigned long value; + auto struct symbol sym; + auto char *symbol; + + *(line-1) = 0; /* null terminate the address string */ + value = strtoul(sym_start+1, (char **) 0, 16); + *(line-1) = '>'; /* put back delim */ + + if ( !symbol_lookup || (symbol = LookupSymbol(value, &sym)) == (char *)0 ) + { + parse_state = PARSING_TEXT; + break; + } + + /* + ** verify there is room in the line buffer + */ + sym_space = space + ( line - sym_start ); + if( (unsigned) sym_space < strlen(symbol) + 30 ) /*(30 should be overkill)*/ + { + parse_state = PARSING_TEXT; /* not enough space */ + break; + } + + delta = sprintf( sym_start, "%s+%d/%d]", + symbol, sym.offset, sym.size ); + + space = sym_space + delta; + line = sym_start + delta; + symbols_expanded = 1; + } + ptr++; + len--; + parse_state = PARSING_TEXT; + break; + + default: /* Can't get here! */ + parse_state = PARSING_TEXT; + + } + } + + return; +} + + +static void LogKernelLine(void) +{ + auto int rdcnt; + + /* + * Zero-fill the log buffer. This should cure a multitude of + * problems with klogd logging the tail end of the message buffer + * which will contain old messages. Then read the kernel log + * messages into this fresh buffer. + */ + memset(log_buffer, '\0', sizeof(log_buffer)); + if ( (rdcnt = ksyslog(2, log_buffer, sizeof(log_buffer)-1)) < 0 ) + { + if ( errno == EINTR ) + return; + fprintf(stderr, "rklogd: Error return from sys_sycall: " \ + "%d - %s\n", errno, strerror(errno)); + } + else + LogLine(log_buffer, rdcnt); + return; +} + + +static void LogProcLine(void) +{ + auto int rdcnt; + + /* + * Zero-fill the log buffer. This should cure a multitude of + * problems with klogd logging the tail end of the message buffer + * which will contain old messages. Then read the kernel messages + * from the message pseudo-file into this fresh buffer. + */ + memset(log_buffer, '\0', sizeof(log_buffer)); + if ( (rdcnt = read(kmsg, log_buffer, sizeof(log_buffer)-1)) < 0 ) + { + if ( errno == EINTR ) + return; + Syslog(LOG_ERR, "Cannot read proc file system: %d - %s.", \ + errno, strerror(errno)); + } + else + LogLine(log_buffer, rdcnt); + + return; +} + + +#if 0 +int main(int argc, char *argv[]) +{ + int ch, + use_output = 0; + + char *log_level = (char *) 0, + *output = (char *) 0; + + /* Parse the command-line. */ + while ((ch = getopt(argc, argv, "c:df:iIk:nopsvx2")) != EOF) + switch((char)ch) + { + case '2': /* Print lines with symbols twice. */ + symbols_twice = 1; + break; + case 'c': /* Set console message level. */ + log_level = optarg; + break; + case 'd': /* Activity debug mode. */ + debugging = 1; + break; + case 'f': /* Define an output file. */ + output = optarg; + use_output++; + break; + case 'k': /* Kernel symbol file. */ + symfile = optarg; + break; + case 'p': + SetParanoiaLevel(1); /* Load symbols on oops. */ + break; + case 's': /* Use syscall interface. */ + use_syscall = 1; + break; + case 'x': + symbol_lookup = 0; + break; + } + + + /* Set console logging level. */ + if ( log_level != (char *) 0 ) + { + if ( (strlen(log_level) > 1) || \ + (strchr("12345678", *log_level) == (char *) 0) ) + { + fprintf(stderr, "rklogd: Invalid console logging " + "level <%s> specified.\n", log_level); + return(1); + } + console_log_level = *log_level - '0'; + } +} +#endif + +BEGINrunInput +CODESTARTrunInput + /* Determine where kernel logging information is to come from. */ + logsrc = GetKernelLogSrc(); + if (symbol_lookup) { + symbol_lookup = (InitKsyms(symfile) == 1); + symbol_lookup |= InitMsyms(); + if (symbol_lookup == 0) { + Syslog(LOG_WARNING, "cannot find any symbols, turning off symbol lookups\n"); + } + } + + /* this is an endless loop - it is terminated when the thread is + * signalled to do so. This, however, is handled by the framework, + * right into the sleep below. + */ + while(!pThrd->bShallStop) { + /* we do not need to handle the RS_RET_TERMINATE_NOW case any + * special because we just need to terminate. This may be different + * if a cleanup is needed. But for now, we can just use CHKiRet(). + * rgerhards, 2007-12-17 + */ + switch ( logsrc ) + { + case kernel: + LogKernelLine(); + break; + case proc: + LogProcLine(); + break; + case none: + pause(); + break; + } +// CHKiRet(thrdSleep(pThrd, iMarkMessagePeriod, 0)); /* seconds, micro seconds */ + } +finalize_it: + /* cleanup here */ + CloseLogSrc(); + + return iRet; +ENDrunInput + + +BEGINwillRun +CODESTARTwillRun +ENDwillRun + + +BEGINfreeInstance +CODESTARTfreeInstance +ENDfreeInstance + + +BEGINdbgPrintInstInfo +CODESTARTdbgPrintInstInfo +ENDdbgPrintInstInfo + + +BEGINmodExit +CODESTARTmodExit +ENDmodExit + + +BEGINqueryEtryPt +CODESTARTqueryEtryPt +CODEqueryEtryPt_STD_IMOD_QUERIES +ENDqueryEtryPt + +static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal) +{ + + return RS_RET_OK; +} + +BEGINmodInit() +CODESTARTmodInit + *ipIFVersProvided = 1; /* so far, we only support the initial definition */ +CODEmodInit_QueryRegCFSLineHdlr + //CHKiRet(omsdRegCFSLineHdlr((uchar *)"markmessageperiod", 0, eCmdHdlrInt, NULL, &iMarkMessagePeriod, STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler, resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID)); +ENDmodInit +/* + * Local variables: + * c-indent-level: 8 + * c-basic-offset: 8 + * tab-width: 8 + * End: + * vi:set ai: + */ diff --git a/ksym.c b/plugins/imklog/ksym.c index baee2c05..baee2c05 100644 --- a/ksym.c +++ b/plugins/imklog/ksym.c diff --git a/ksym_mod.c b/plugins/imklog/ksym_mod.c index 51ca2fb8..51ca2fb8 100644 --- a/ksym_mod.c +++ b/plugins/imklog/ksym_mod.c diff --git a/ksyms.h b/plugins/imklog/ksyms.h index 316950a0..316950a0 100644 --- a/ksyms.h +++ b/plugins/imklog/ksyms.h diff --git a/plugins/imklog/module.h b/plugins/imklog/module.h new file mode 100644 index 00000000..71eac2c4 --- /dev/null +++ b/plugins/imklog/module.h @@ -0,0 +1,81 @@ +/* Module definitions for klogd's module support + * + * Copyright 2007 by Rainer Gerhards and others + * + * This file is part of rsyslog. + * + * Rsyslog is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * Rsyslog is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with Rsyslog. If not, see <http://www.gnu.org/licenses/>. + * + * A copy of the GPL can be found in the file "COPYING" in this distribution. + */ +struct kernel_sym +{ + unsigned long value; + char name[60]; +}; + +struct module_symbol +{ + unsigned long value; + const char *name; +}; + +struct module_ref +{ + struct module *dep; /* "parent" pointer */ + struct module *ref; /* "child" pointer */ + struct module_ref *next_ref; +}; + +struct module_info +{ + unsigned long addr; + unsigned long size; + unsigned long flags; + long usecount; +}; + + +typedef struct { volatile int counter; } atomic_t; + +struct module +{ + unsigned long size_of_struct; /* == sizeof(module) */ + struct module *next; + const char *name; + unsigned long size; + + union + { + atomic_t usecount; + long pad; + } uc; /* Needs to keep its size - so says rth */ + + unsigned long flags; /* AUTOCLEAN et al */ + + unsigned nsyms; + unsigned ndeps; + + struct module_symbol *syms; + struct module_ref *deps; + struct module_ref *refs; + int (*init)(void); + void (*cleanup)(void); + const struct exception_table_entry *ex_table_start; + const struct exception_table_entry *ex_table_end; +#ifdef __alpha__ + unsigned long gp; +#endif +}; + diff --git a/plugins/immark/immark.c b/plugins/immark/immark.c index fa603260..78adcbac 100644 --- a/plugins/immark/immark.c +++ b/plugins/immark/immark.c @@ -30,7 +30,6 @@ * A copy of the GPL can be found in the file "COPYING" in this distribution. */ #include "config.h" -#if 1 /* IMMARK */ #include "rsyslog.h" #include <stdlib.h> #include <stdio.h> @@ -49,7 +48,7 @@ TERM_SYNC_TYPE(eTermSync_SIGNAL) #define DEFAULT_MARK_PERIOD (20 * 60) /* Module static data */ -DEF_OMOD_STATIC_DATA +DEF_IMOD_STATIC_DATA static int iMarkMessagePeriod = DEFAULT_MARK_PERIOD; typedef struct _instanceData { @@ -129,7 +128,6 @@ CODEmodInit_QueryRegCFSLineHdlr CHKiRet(omsdRegCFSLineHdlr((uchar *)"markmessageperiod", 0, eCmdHdlrInt, NULL, &iMarkMessagePeriod, STD_LOADABLE_MODULE_ID)); CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler, resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID)); ENDmodInit -#endif /* #if 0 */ /* * vi:set ai: */ diff --git a/syslog.c b/syslog.c deleted file mode 100644 index 111a37f9..00000000 --- a/syslog.c +++ /dev/null @@ -1,141 +0,0 @@ -/* logger.c - * Helper routines for klogd. It replaces the regular glibc syslog() - * call. The reason is that the glibc version does not support - * logging with the kernel facility. This file is a re-implementation - * of the functions with only the functionality required for klogd. - * So it can NOT be used as a general-purpose replacment. - * Thanks to being special, this version is deemed to be considerable - * faster than its glibc counterpart. - * To avoid confusion, the syslog() replacement is named writeSyslog(). - * all other functions are just helpers to it. - * RGerhards, 2007-06-14 - * - * Copyright (C) 2007 Rainer Gerhards - * - * This file is part of rsyslog. - * - * Rsyslog is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * Rsyslog is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with Rsyslog. If not, see <http://www.gnu.org/licenses/>. - * - * A copy of the GPL can be found in the file "COPYING" in this distribution. - */ -#include "config.h" - -#include <stdio.h> -#include <assert.h> -#include <sys/socket.h> -#include <string.h> -#include <time.h> -#include <stdarg.h> -#include <unistd.h> - -#define PATH_LOGNAME "/dev/log" /* be sure you know what you do if you change this! */ - -static struct sockaddr LoggerAddr; /* AF_UNIX address of local logger */ -static int connected; /* have done connect */ -static int fdLog = -1; /* fd for log - -1 if closed */ - -/* klogOpenLog - * opens the system log for writing. The log is opened immediately. - * If it is already open, no action is taken) - */ -static void klogOpenlog(void) -{ - if (fdLog == -1) { - LoggerAddr.sa_family = AF_UNIX; - strncpy(LoggerAddr.sa_data, PATH_LOGNAME, sizeof(LoggerAddr.sa_data)); - fdLog = socket(AF_UNIX, SOCK_DGRAM, 0); - } - if (fdLog != -1 && !connected) - if(connect(fdLog, &LoggerAddr, sizeof(LoggerAddr.sa_family) + - sizeof(PATH_LOGNAME) - 1 /* for \0 byte!*/ ) != -1) - connected = 1; -} - -/* Close the log file if it is currently open. - */ -static void klogCloselog(void) -{ - if(fdLog != -1) - close(fdLog); - fdLog = -1; - connected = 0; -} - -/* Write a message to the syslogd. - * returns -1 if it fails, something else otherwise - */ -int writeSyslogV(int iPRI, const char *szFmt, va_list va) -{ - int iChars; - int iLen; - time_t tNow; - int iWritten; /* number of bytes written */ - char msgBuf[2048]; /* we use the same size as sysklogd to remain compatible */ - - assert(szFmt != NULL); - - if (fdLog < 0 || !connected) - klogOpenlog(); - - /* build the message */ - time(&tNow); - /* we can use sprintf safely below, because we know the size of the constants. - * By doing so, we save some cpu cycles and code complexity (for unnecessary - * error checking). - */ - iLen = sprintf(msgBuf, "<%d>%.15s kernel: ", iPRI, ctime(&tNow) + 4); - - iChars = vsnprintf(msgBuf + iLen, sizeof(msgBuf) / sizeof(char) - iLen, szFmt, va); - if(iChars > (int)(sizeof(msgBuf) / sizeof(char) - iLen)) - iLen = sizeof(msgBuf) / sizeof(char) - 1; /* full buffer siz minus \0 byte */ - else - iLen += iChars; - - /* output the message to the local logger */ - iWritten = write(fdLog, msgBuf, iLen); - /* Debug aid below - uncomment to use - printf("wrote to log(%d): '%s'\n", iWritten, msgBuf); */ - - if(iWritten == -1) { - /* retry */ - klogCloselog(); - klogOpenlog(); - iWritten = write(fdLog, msgBuf, iLen); - } - - return(iWritten); -} - -/* And now the same with variable arguments */ -int writeSyslog(int iPRI, const char *szFmt, ...) -{ - int iRet; - va_list va; - - assert(szFmt != NULL); - va_start(va, szFmt); - iRet = writeSyslogV(iPRI, szFmt, va); - va_end(va); - - return(iRet); -} - -/* - * Local variables: - * c-indent-level: 4 - * c-basic-offset: 4 - * tab-width: 4 - * End: - * vi:set ai: - */ @@ -492,7 +492,6 @@ static char *LogPort = "514"; /* port number for INET connections */ static int MarkInterval = 20 * 60; /* interval between marks in seconds - read-only after startup */ int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both), set via cmdline */ int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */ -static int MarkSeq = 0; /* mark sequence number - modified in domark() only */ static int NoFork = 0; /* don't fork - don't run in daemon mode - read-only after startup */ static int AcceptRemote = 0;/* receive messages that come via UDP - read-only after startup */ int ACLAddHostnameOnFail = 0; /* add hostname to acl when DNS resolving has failed */ @@ -650,7 +649,6 @@ static void *singleWorker(); /* REMOVEME later 2005-10-24 */ /* Function prototypes. */ static char **crunch_list(char *list); static void printline(char *hname, char *msg, int iSource); -static void logmsg(int pri, msg_t*, int flags); static rsRetVal fprintlog(action_t *pAction); static void reapchild(); static void debug_switch(); @@ -23,6 +23,7 @@ #include "syslogd-types.h" #include "objomsr.h" +#include "template.h" #ifdef USE_NETZIP #include <unistd.h> @@ -71,6 +72,7 @@ int getSubString(uchar **ppSrc, char *pDst, size_t DstSize, char cSep); * module interface -- rgerhards, 2007-12-12 */ void logmsgInternal(int pri, char *msg, int flags); +void logmsg(int pri, msg_t *pMsg, int flags); extern int bFinished; /* used by termination signal handler, read-only except there */ extern int glblHadMemShortage; /* indicates if we had memory shortage some time during the run */ |