. strerror() assumes this . remove generated libminc/errlist.c . errno's in <sys/errno.h> have to be in sorted order . filtering out some errno.h in Makefile lets us use near-stock errlist.awk
939 lines
25 KiB
C
939 lines
25 KiB
C
/*
|
|
** Copyright (c) 1983, 1988
|
|
** The Regents of the University of California. All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. All advertising materials mentioning features or use of this software
|
|
** must display the following acknowledgement:
|
|
** This product includes software developed by the University of
|
|
** California, Berkeley and its contributors.
|
|
** 4. Neither the name of the University nor the names of its contributors
|
|
** may be used to endorse or promote products derived from this software
|
|
** without specific prior written permission.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
** ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
** SUCH DAMAGE.
|
|
**
|
|
** #ifndef lint
|
|
** char copyright2[] =
|
|
** "@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\
|
|
** All rights reserved.\n";
|
|
** #endif
|
|
**
|
|
** #ifndef lint
|
|
** static char sccsid[] = "@(#)syslogd.c 5.27 (Berkeley) 10/10/88";
|
|
** #endif
|
|
**
|
|
** -----------------------------------------------------------------------
|
|
**
|
|
** SYSLOGD -- log system messages
|
|
** This program implements a system log.
|
|
** It takes a series of lines and outputs them according to the setup
|
|
** defined in the configuration file.
|
|
** Each line may have a priority, signified as "<n>" as
|
|
** the first characters of the line. If this is
|
|
** not present, a default priority is used.
|
|
**
|
|
** To kill syslogd, send a signal 15 (terminate).
|
|
** A signal 1 (hup) will cause it to reread its configuration file.
|
|
**
|
|
** Defined Constants:
|
|
** MAXLINE -- the maximimum line length that can be handled.
|
|
** MAXSVLINE -- the length of saved messages (for filtering)
|
|
** 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)
|
|
** changes by Steve Lord
|
|
**
|
|
** Extensive rewriting by G. Falzoni <gfalzoni@inwind.it> for porting to Minix
|
|
**
|
|
** $Log$
|
|
** Revision 1.3 2006/04/04 14:22:40 beng
|
|
** Fix
|
|
**
|
|
** Revision 1.2 2006/04/04 14:18:16 beng
|
|
** Make syslogd work, even if it can only open klog and not udp or vice versa
|
|
** (but not neither)
|
|
**
|
|
** Revision 1.1 2006/04/03 13:07:42 beng
|
|
** Kick out usyslogd in favour of syslogd Giovanni's syslogd port
|
|
**
|
|
** Revision 1.3 2005/09/16 10:10:12 lsodgf0
|
|
** Rework for Minix 3. Adds kernel logs from /dev/klogd
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <limits.h>
|
|
#include <time.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/select.h>
|
|
#include <sys/wait.h>
|
|
#include <net/netlib.h>
|
|
#include <net/hton.h>
|
|
#include <net/gen/in.h>
|
|
#include <net/gen/udp.h>
|
|
#include <net/gen/udp_io.h>
|
|
#include <net/gen/netdb.h>
|
|
|
|
#define SYSLOG_NAMES
|
|
#include <syslog.h>
|
|
#define KLOGD 1
|
|
/** Define following values to your requirements **/
|
|
#define MAXLINE 512 /* maximum line length */
|
|
#define MAXSVLINE 256 /* maximum saved line length */
|
|
|
|
#define DEFUPRI (LOG_USER|LOG_NOTICE)
|
|
#define DEFSPRI (LOG_KERN|LOG_CRIT)
|
|
|
|
/* Flags to logmsg() */
|
|
#define IGN_CONS 0x001 /* don't print on console */
|
|
#define SYNC_FILE 0x002 /* do fsync on file after printing */
|
|
#define ADDDATE 0x004 /* add a date to the message */
|
|
#define MARK 0x008 /* this message is a mark */
|
|
|
|
#define CTTY "/dev/log" /* Minix log device (console) */
|
|
|
|
#define dprintf if(DbgOpt!=0)printf
|
|
#if debug == 0
|
|
#define DEBUG(statement)
|
|
#else
|
|
#define DEBUG(statement) statement
|
|
#endif
|
|
#if !defined PIDFILE
|
|
#define PIDFILE "/var/run/syslogd.pid"
|
|
#endif
|
|
|
|
#define UNAMESZ 8 /* length of a login name */
|
|
#define MAXUNAMES 20 /* maximum number of user names */
|
|
#define MAXFNAME 200 /* max file pathname length */
|
|
#define MAXHOSTNAMELEN 64 /* max length of FQDN host name */
|
|
|
|
/* Intervals at which we flush out "message repeated" messages,
|
|
* in seconds after previous message is logged. After each flush,
|
|
* we move to the next interval until we reach the largest. */
|
|
#define TIMERINTVL 30 /* interval for checking flush, mark */
|
|
#define INTERVAL1 30
|
|
#define INTERVAL2 60
|
|
#define MAXREPEAT ((sizeof(repeatinterval)/sizeof(repeatinterval[0]))-1)
|
|
#define REPEATTIME(f) ((f)->f_time+repeatinterval[(f)->f_repeatcount])
|
|
#define BACKOFF(f) {if(++(f)->f_repeatcount>MAXREPEAT)(f)->f_repeatcount=MAXREPEAT;}
|
|
|
|
/* Values for f_type */
|
|
#define F_UNUSED 0 /* unused entry */
|
|
#define F_FILE 1 /* regular file */
|
|
#define F_TTY 2 /* terminal */
|
|
#define F_CONSOLE 3 /* console terminal */
|
|
#define F_FORW 4 /* remote machine */
|
|
#define F_USERS 5 /* list of users */
|
|
#define F_WALL 6 /* everyone logged on */
|
|
|
|
#define max(a,b) ((a)>=(b)?(a):(b))
|
|
|
|
/* This structure represents the files that will have log copies printed */
|
|
struct filed {
|
|
struct filed *f_next; /* next in linked list */
|
|
short f_type; /* entry type, see below */
|
|
short f_file; /* file descriptor */
|
|
time_t f_time; /* time this was last written */
|
|
char f_pmask[LOG_NFACILITIES + 1]; /* priority mask */
|
|
union {
|
|
char f_uname[MAXUNAMES][UNAMESZ + 1];
|
|
char f_fname[MAXFNAME];
|
|
} f_un;
|
|
char f_prevline[MAXSVLINE]; /* last message logged */
|
|
char f_lasttime[16]; /* time of last occurrence */
|
|
char f_prevhost[MAXHOSTNAMELEN + 1]; /* host from which recd. */
|
|
int f_prevpri; /* pri of f_prevline */
|
|
int f_prevlen; /* length of f_prevline */
|
|
int f_prevcount; /* repetition cnt of prevline */
|
|
int f_repeatcount; /* number of "repeated" msgs */
|
|
int f_flags; /* store some additional flags */
|
|
};
|
|
|
|
static const char *const TypeNames[] =
|
|
{
|
|
"UNUSED", "FILE", "TTY", "CONSOLE", "FORW", "USERS", "WALL", NULL,
|
|
};
|
|
|
|
static struct filed *Files = NULL;
|
|
static struct filed consfile;
|
|
static int DbgOpt = 0; /* debug flag */
|
|
static char LocalHostName[MAXHOSTNAMELEN + 1]; /* our hostname */
|
|
static int Initialized = 0; /* set when we have initialized ourselves */
|
|
static int MarkInterval = 20 * 60; /* interval between marks in seconds */
|
|
static int MarkSeq = 0; /* mark sequence number */
|
|
static time_t now;
|
|
|
|
static const char *ConfFile = "/etc/syslog.conf";
|
|
static const char *PidFile = PIDFILE; /* "/var/run/syslogd.pid" */
|
|
static const char ctty[] = CTTY;
|
|
|
|
static const char ProgName[] = "syslogd:";
|
|
static const char version[] = "1.3 (Minix)";
|
|
static const char usage[] =
|
|
/* */ "usage:\tsyslogd [-d] [-m markinterval] [-f conf-file]\n"
|
|
"\t\t[-p listeningport] [-v] [-?]\n" ;
|
|
static const int repeatinterval[] =
|
|
/* */ {INTERVAL1, INTERVAL2,}; /* # of secs before flush */
|
|
|
|
/*
|
|
** Name: void wallmsg(struct filed *fLog, char *message);
|
|
** Function: Write the specified message to either the entire
|
|
** world, or a list of approved users.
|
|
*/
|
|
void wallmsg(struct filed * fLog, char *message)
|
|
{
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** Name: void fprintlog(struct filed *fLog, int flags, char *message);
|
|
** Function:
|
|
*/
|
|
void fprintlog(struct filed * fLog, int flags, char *message)
|
|
{
|
|
int len;
|
|
char line[MAXLINE + 1];
|
|
char repbuf[80];
|
|
|
|
if (message == NULL) {
|
|
if (fLog->f_prevcount > 1) {
|
|
sprintf(repbuf, "last message repeated %d times", fLog->f_prevcount);
|
|
message = repbuf;
|
|
} else
|
|
message = fLog->f_prevline;
|
|
}
|
|
snprintf(line, sizeof(line), "%s %s %s",
|
|
fLog->f_lasttime, fLog->f_prevhost, message);
|
|
DEBUG(dprintf("Logging to %s", TypeNames[fLog->f_type]);)
|
|
fLog->f_time = now;
|
|
switch (fLog->f_type) {
|
|
case F_UNUSED: /* */
|
|
DEBUG(dprintf("\n");)
|
|
break;
|
|
case F_CONSOLE:
|
|
if (flags & IGN_CONS) {
|
|
case F_FORW: /* */
|
|
DEBUG(dprintf(" (ignored)\n");)
|
|
break;
|
|
} /* else Fall Through */
|
|
case F_TTY:
|
|
case F_FILE:
|
|
DEBUG(dprintf(" %s\n", fLog->f_un.f_fname);)
|
|
strcat(line, fLog->f_type != F_FILE ? "\r\n" : "\n");
|
|
len = strlen(line);
|
|
if (write(fLog->f_file, line, len) != len) {
|
|
/* Handle errors */ ;
|
|
} else if (flags & SYNC_FILE)
|
|
sync();
|
|
break;
|
|
case F_USERS:
|
|
case F_WALL:
|
|
DEBUG(dprintf("\n");)
|
|
strcat(line, "\r\n");
|
|
wallmsg(fLog, line);
|
|
break;
|
|
}
|
|
fLog->f_prevcount = 0;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** Name: void logmsg(int pri, char *msg, char *from, int flags);
|
|
** Function: Log a message to the appropriate log files, users, etc.
|
|
** based on the priority.
|
|
*/
|
|
void logmsg(int pri, char *msg, char *from, int flags)
|
|
{
|
|
struct filed *f;
|
|
int fac, prilev;
|
|
int omask, msglen;
|
|
char *timestamp;
|
|
|
|
DEBUG(dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n", pri, flags, from, msg);)
|
|
/*
|
|
omask = sigblock(__sigmask(SIGHUP) | __sigmask(SIGALRM));
|
|
*/
|
|
/* Check to see if msg looks non-standard. */
|
|
msglen = strlen(msg);
|
|
if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' ||
|
|
msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
|
|
flags |= ADDDATE;
|
|
|
|
time(&now);
|
|
if (flags & ADDDATE)
|
|
timestamp = ctime(&now) + 4;
|
|
else {
|
|
timestamp = msg;
|
|
msg += 16;
|
|
msglen -= 16;
|
|
}
|
|
|
|
/* Extract facility and priority level */
|
|
fac = (flags & MARK) ? LOG_NFACILITIES : LOG_FAC(pri);
|
|
prilev = LOG_PRI(pri);
|
|
|
|
/* Log the message to the particular outputs */
|
|
if (!Initialized) {
|
|
/* Not yet initialized. Every message goes to console */
|
|
f = &consfile;
|
|
f->f_file = open(ctty, O_WRONLY | O_NOCTTY);
|
|
if (f->f_file >= 0) {
|
|
if (!DbgOpt) setsid();
|
|
fprintlog(f, flags, msg);
|
|
close(f->f_file);
|
|
}
|
|
} else {
|
|
for (f = Files; f; f = f->f_next) {
|
|
|
|
/* Skip messages that are incorrect priority */
|
|
if (f->f_pmask[fac] < prilev || f->f_pmask[fac] == INTERNAL_NOPRI)
|
|
continue;
|
|
|
|
if (f->f_type == F_CONSOLE && (flags & IGN_CONS)) continue;
|
|
|
|
/* Don't output marks to recently written files */
|
|
if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2)
|
|
continue;
|
|
|
|
/* Suppress duplicate lines to this file */
|
|
if ((flags & MARK) == 0 && msglen == f->f_prevlen &&
|
|
!strcmp(msg, f->f_prevline) &&
|
|
!strcmp(from, f->f_prevhost)) {
|
|
strncpy(f->f_lasttime, timestamp, 15);
|
|
f->f_prevcount += 1;
|
|
DEBUG(dprintf("msg repeated %d times, %ld sec of %d\n",
|
|
f->f_prevcount, now - f->f_time,
|
|
repeatinterval[f->f_repeatcount]);)
|
|
/* If domark would have logged this by now,
|
|
* flush it now (so we don't hold isolated
|
|
* messages), but back off so we'll flush
|
|
* less often in the future. */
|
|
if (now > REPEATTIME(f)) {
|
|
fprintlog(f, flags, (char *) NULL);
|
|
BACKOFF(f);
|
|
}
|
|
} else {
|
|
/* New line, save it */
|
|
if (f->f_prevcount) fprintlog(f, 0, (char *) NULL);
|
|
f->f_repeatcount = 0;
|
|
strncpy(f->f_lasttime, timestamp, 15);
|
|
strncpy(f->f_prevhost, from, sizeof(f->f_prevhost));
|
|
if (msglen < MAXSVLINE) {
|
|
f->f_prevlen = msglen;
|
|
f->f_prevpri = pri;
|
|
strcpy(f->f_prevline, msg);
|
|
fprintlog(f, flags, (char *) NULL);
|
|
} else {
|
|
f->f_prevline[0] = 0;
|
|
f->f_prevlen = 0;
|
|
fprintlog(f, flags, msg);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
sigsetmask(omask);
|
|
*/
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** Name: void logerror(char *type);
|
|
** Function: Prints syslogd errors in some place.
|
|
*/
|
|
void logerror(char *type)
|
|
{
|
|
char buf[100];
|
|
|
|
if (errno == 0) sprintf(buf, "%s %s", ProgName, type);
|
|
|
|
sprintf(buf, "%s %s - %s", ProgName, type, strerror(errno));
|
|
|
|
errno = 0;
|
|
dprintf("%s\n", buf);
|
|
logmsg(LOG_SYSLOG | LOG_ERR, buf, LocalHostName, ADDDATE);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** Name: void die(int sig);
|
|
** Function: Signal handler for kill signals.
|
|
*/
|
|
void die(int sig)
|
|
{
|
|
struct filed *f;
|
|
char buf[100];
|
|
|
|
for (f = Files; f != NULL; f = f->f_next) {
|
|
/* Flush any pending output */
|
|
if (f->f_prevcount) fprintlog(f, 0, NULL);
|
|
}
|
|
if (sig >= 0) {
|
|
DEBUG(dprintf("%s exiting on signal %d\n", ProgName, sig);)
|
|
sprintf(buf, "exiting on signal %d", sig);
|
|
errno = 0;
|
|
logerror(buf);
|
|
}
|
|
unlink(PidFile);
|
|
exit(sig == (-1) ? EXIT_FAILURE : EXIT_SUCCESS);
|
|
}
|
|
|
|
/*
|
|
** Name: void domark(int sig);
|
|
** Function: Signal handler for alarm.
|
|
** Used for messages filtering and mark facility.
|
|
*/
|
|
void domark(int sig)
|
|
{
|
|
struct filed *f;
|
|
|
|
now = time(NULL);
|
|
MarkSeq += TIMERINTVL;
|
|
if (MarkSeq >= MarkInterval) {
|
|
logmsg(LOG_INFO, "-- MARK --", LocalHostName, ADDDATE | MARK);
|
|
MarkSeq = 0;
|
|
}
|
|
for (f = Files; f; f = f->f_next) {
|
|
if (f->f_prevcount && now >= REPEATTIME(f)) {
|
|
DEBUG(dprintf("flush %s: repeated %d times, %d sec.\n",
|
|
TypeNames[f->f_type], f->f_prevcount,
|
|
repeatinterval[f->f_repeatcount]);)
|
|
fprintlog(f, 0, NULL);
|
|
BACKOFF(f);
|
|
}
|
|
}
|
|
signal(SIGALRM, domark);
|
|
alarm(TIMERINTVL);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** Name: int decode(char *name, struct _code *codetab);
|
|
** Function: Decode a symbolic name to a numeric value
|
|
*/
|
|
int decode(char *name, const struct _code *codetab)
|
|
{
|
|
const struct _code *c;
|
|
char *p;
|
|
char buf[40];
|
|
|
|
DEBUG(dprintf("symbolic name: %s", name);)
|
|
if (isdigit(*name)) return (atoi(name));
|
|
|
|
strcpy(buf, name);
|
|
for (p = buf; *p; p += 1) {
|
|
if (isupper(*p)) *p = tolower(*p);
|
|
}
|
|
for (c = codetab; c->c_name; c += 1) {
|
|
if (!strcmp(buf, c->c_name)) {
|
|
DEBUG(dprintf(" ==> %d\n", c->c_val);)
|
|
return (c->c_val);
|
|
}
|
|
}
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
** Name: void cfline(char *line, struct filed *f);
|
|
** Function: Parse a configuration file line
|
|
*/
|
|
void cfline(char *line, struct filed * fLog)
|
|
{
|
|
char *p, *q, *bp;
|
|
int ix, pri;
|
|
char buf[MAXLINE];
|
|
char xbuf[200];
|
|
|
|
DEBUG(dprintf("cfline(%s)\n", line);)
|
|
|
|
/* Keep sys_errlist stuff out of logerror messages */
|
|
errno = 0;
|
|
|
|
/* Clear out file entry */
|
|
memset(fLog, 0, sizeof(*fLog));
|
|
for (ix = 0; ix <= LOG_NFACILITIES; ix += 1) /* */
|
|
fLog->f_pmask[ix] = INTERNAL_NOPRI;
|
|
|
|
/* Scan through the list of selectors */
|
|
for (p = line; *p && *p != '\t';) {
|
|
|
|
/* Find the end of this facility name list */
|
|
for (q = p; *q && *q != '\t' && *q++ != '.';) continue;
|
|
|
|
/* Collect priority name */
|
|
for (bp = buf; *q && !strchr("\t,;", *q);) *bp++ = *q++;
|
|
*bp = '\0';
|
|
|
|
/* Skip cruft */
|
|
while (strchr(", ;", *q)) q++;
|
|
|
|
/* Decode priority name */
|
|
#ifdef __NBSD_LIBC
|
|
pri = decode(buf, prioritynames);
|
|
#else
|
|
pri = decode(buf, PriNames);
|
|
#endif
|
|
if (pri < 0) {
|
|
sprintf(xbuf, "unknown priority name \"%s\"", buf);
|
|
logerror(xbuf);
|
|
return;
|
|
}
|
|
|
|
/* Scan facilities */
|
|
while (*p && !strchr("\t.;", *p)) {
|
|
for (bp = buf; *p && !strchr("\t,;.", *p);) *bp++ = *p++;
|
|
*bp = '\0';
|
|
if (*buf == '*') {
|
|
for (ix = 0; ix <= LOG_NFACILITIES; ix += 1)
|
|
if ((fLog->f_pmask[ix] < pri) ||
|
|
(fLog->f_pmask[ix] == INTERNAL_NOPRI)) {
|
|
fLog->f_pmask[ix] = pri;
|
|
}
|
|
} else {
|
|
#ifdef __NBSD_LIBC
|
|
ix = decode(buf, facilitynames);
|
|
#else
|
|
ix = decode(buf, FacNames);
|
|
#endif
|
|
if (ix < 0) {
|
|
sprintf(xbuf, "unknown facility name \"%s\"", buf);
|
|
logerror(xbuf);
|
|
return;
|
|
}
|
|
if ((fLog->f_pmask[ix >> 3] < pri) ||
|
|
(fLog->f_pmask[ix >> 3] == INTERNAL_NOPRI)) {
|
|
fLog->f_pmask[ix >> 3] = pri;
|
|
}
|
|
}
|
|
while (*p == ',' || *p == ' ') p++;
|
|
}
|
|
p = q;
|
|
}
|
|
|
|
/* Skip to action part */
|
|
while (*p == '\t' || *p == ' ') p++;
|
|
|
|
DEBUG(dprintf("leading char in action: %c\n", *p);)
|
|
switch (*p) {
|
|
case '@': /* Logging to a remote host */
|
|
break; /* NOT IMPLEMENTED */
|
|
|
|
case '/': /* Logging to a local file/device */
|
|
strcpy(fLog->f_un.f_fname, p);
|
|
DEBUG(dprintf("filename: %s\n", p); /* ASP */)
|
|
if ((fLog->f_file = open(p, O_WRONLY | O_APPEND | O_CREAT | O_NOCTTY, 0644)) < 0) {
|
|
fLog->f_file = F_UNUSED;
|
|
sprintf(xbuf, "unknown file/device (%s)", p);
|
|
logerror(xbuf);
|
|
break;
|
|
}
|
|
if (isatty(fLog->f_file)) {
|
|
if (!DbgOpt) setsid();
|
|
fLog->f_type = F_TTY;
|
|
} else
|
|
fLog->f_type = F_FILE;
|
|
if (strcmp(p, ctty) == 0) fLog->f_type = F_CONSOLE;
|
|
break;
|
|
|
|
case '*': /* Logging to all users */
|
|
DEBUG(dprintf("write-all\n");)
|
|
fLog->f_type = F_WALL;
|
|
break;
|
|
|
|
default: /* Logging to selected users */
|
|
DEBUG(dprintf("users: %s\n", p); /* ASP */)
|
|
for (ix = 0; ix < MAXUNAMES && *p; ix += 1) {
|
|
for (q = p; *q && *q != ',';) q += 1;
|
|
strncpy(fLog->f_un.f_uname[ix], p, UNAMESZ);
|
|
if ((q - p) > UNAMESZ)
|
|
fLog->f_un.f_uname[ix][UNAMESZ] = '\0';
|
|
else
|
|
fLog->f_un.f_uname[ix][q - p] = '\0';
|
|
while (*q == ',' || *q == ' ') q++;
|
|
p = q;
|
|
}
|
|
fLog->f_type = F_USERS;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** Name: void printline(char *hname, char *msg);
|
|
** Function: Takes a raw input line, decodes the message and
|
|
** prints the message on the appropriate log files.
|
|
*/
|
|
void printline(char *hname, char *msg)
|
|
{
|
|
char line[MAXLINE + 1];
|
|
char *p = msg, *q = line;
|
|
int ch, pri = DEFUPRI;
|
|
|
|
/* Test for special codes */
|
|
if (*p == '<') {
|
|
pri = 0;
|
|
while (isdigit(*++p)) {
|
|
if ((*p - '0') < 8) {
|
|
/* Only 3 bits allocated for pri -- ASP */
|
|
pri = 10 * pri + (*p - '0');
|
|
} else
|
|
pri = 10 * pri + 7;
|
|
}
|
|
if (*p == '>') ++p;
|
|
}
|
|
if (pri & ~(LOG_FACMASK | LOG_PRIMASK)) pri = DEFUPRI;
|
|
|
|
/* Does not allow users to log kernel messages */
|
|
if (LOG_FAC(pri) == LOG_KERN) pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
|
|
|
|
/* Copies message to local buffer, translating control characters */
|
|
while ((ch = *p++ & 0177) != '\0' && q < &line[sizeof(line) - 1]) {
|
|
if (ch == '\n') /* Removes newlines */
|
|
*q++ = ' ';
|
|
else if (iscntrl(ch)) { /* Translates control characters */
|
|
*q++ = '^';
|
|
*q++ = ch ^ 0100;
|
|
} else
|
|
*q++ = ch;
|
|
}
|
|
*q = '\0';
|
|
|
|
logmsg(pri, line, hname, 0);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** Name: void printkline(char *hname, char *msg);
|
|
** Function: Takes a raw input line from kernel and
|
|
** prints the message on the appropriate log files.
|
|
*/
|
|
void printkline(char *hname, char *msg)
|
|
{
|
|
char line[MAXLINE + 1];
|
|
char *p = msg, *q = line;
|
|
int ch, pri = DEFUPRI;
|
|
|
|
/* Copies message to local buffer, adding source program tag */
|
|
snprintf(line, sizeof(line), "kernel: %s", msg);
|
|
|
|
logmsg(LOG_KERN | LOG_INFO, line, hname, ADDDATE);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** Name: void init(int sig);
|
|
** Function: Initialize syslogd from configuration file.
|
|
** Used at startup or after a SIGHUP signal.
|
|
*/
|
|
void init(int sig)
|
|
{
|
|
int i;
|
|
FILE *cf;
|
|
struct filed *fLog, *next, **nextp;
|
|
char *p;
|
|
char cline[BUFSIZ];
|
|
|
|
DEBUG(dprintf("init\n");)
|
|
|
|
/* Close all open log files. */
|
|
Initialized = 0;
|
|
for (fLog = Files; fLog != NULL; fLog = next) {
|
|
|
|
/* Flush any pending output */
|
|
if (fLog->f_prevcount) fprintlog(fLog, 0, NULL);
|
|
|
|
switch (fLog->f_type) {
|
|
case F_FILE:
|
|
case F_TTY:
|
|
case F_CONSOLE: close(fLog->f_file); break;
|
|
}
|
|
next = fLog->f_next;
|
|
free((char *) fLog);
|
|
}
|
|
Files = NULL;
|
|
nextp = &Files;
|
|
|
|
/* Open the configuration file */
|
|
if ((cf = fopen(ConfFile, "r")) != NULL) {
|
|
/* Foreach line in the configuration table, open that file. */
|
|
fLog = NULL;
|
|
while (fgets(cline, sizeof(cline), cf) != NULL) {
|
|
/* Check for end-of-section, comments, strip off
|
|
* trailing spaces and newline character. */
|
|
for (p = cline; isspace(*p); p += 1);
|
|
if (*p == '\0' || *p == '#') continue;
|
|
for (p = strchr(cline, '\0'); isspace(*--p););
|
|
*++p = '\0';
|
|
fLog = (struct filed *) calloc(1, sizeof(*fLog));
|
|
*nextp = fLog;
|
|
nextp = &fLog->f_next;
|
|
cfline(cline, fLog);
|
|
}
|
|
|
|
/* Close the configuration file */
|
|
fclose(cf);
|
|
Initialized = 1;
|
|
DEBUG (
|
|
if (DbgOpt) {
|
|
for (fLog = Files; fLog; fLog = fLog->f_next) {
|
|
for (i = 0; i <= LOG_NFACILITIES; i += 1)
|
|
if (fLog->f_pmask[i] == INTERNAL_NOPRI)
|
|
printf("X ");
|
|
else
|
|
printf("%d ", fLog->f_pmask[i]);
|
|
printf("%s: ", TypeNames[fLog->f_type]);
|
|
switch (fLog->f_type) {
|
|
case F_FILE:
|
|
case F_TTY:
|
|
case F_CONSOLE:
|
|
printf("%s", fLog->f_un.f_fname);
|
|
break;
|
|
case F_FORW:
|
|
break;
|
|
case F_USERS:
|
|
for (i = 0; i < MAXUNAMES && *fLog->f_un.f_uname[i]; i += 1)
|
|
printf("%s, ", fLog->f_un.f_uname[i]);
|
|
break;
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
)
|
|
logmsg(LOG_SYSLOG | LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
|
|
signal(SIGHUP, init);
|
|
DEBUG(dprintf("%s restarted\n", ProgName);)
|
|
} else {
|
|
DEBUG(dprintf("cannot open %s\n", ConfFile);)
|
|
*nextp = (struct filed *) calloc(1, sizeof(*fLog));
|
|
cfline("*.ERR\t" CTTY, *nextp);
|
|
(*nextp)->f_next = (struct filed *) calloc(1, sizeof(*fLog));
|
|
cfline("*.PANIC\t*", (*nextp)->f_next);
|
|
Initialized = 1;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** Name: void daemonize(char *line);
|
|
** Function: Clone itself and becomes a daemon releasing unnecessay resources.
|
|
*/
|
|
void daemonize(char *line)
|
|
{
|
|
int lfd, len, pid;
|
|
|
|
if ((lfd = open(PidFile, O_CREAT | O_RDWR, 0600)) > 0) {
|
|
len = read(lfd, line, 10);
|
|
line[len] = '\0';
|
|
close(lfd);
|
|
if ((kill(len = atoi(line), 0) < 0 && errno == ESRCH) || len == 0) {
|
|
if (!DbgOpt) {
|
|
/* Parent ends and child becomes a daemon */
|
|
if ((pid = fork()) > 0) {
|
|
/* Write process id. in pid file */
|
|
lfd = open(PidFile, O_TRUNC | O_WRONLY);
|
|
len = sprintf(line, "%5d", pid);
|
|
write(lfd, line, len);
|
|
close(lfd);
|
|
|
|
/* Wait for initialization to complete */
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
sleep(1);
|
|
setsid(); /* Set as session leader */
|
|
chdir("/"); /* Change to the root directory */
|
|
/* Get rid of all open files */
|
|
for (lfd = STDERR_FILENO + 1; lfd < OPEN_MAX; lfd += 1)
|
|
close(lfd);
|
|
}
|
|
} else {
|
|
fprintf(stderr, "\n%s already running\n", ProgName);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
} else {
|
|
fprintf(stderr, "\n%s can't open %s (%s)\n", ProgName, PidFile, strerror(errno));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** Name: int main(int argc, char **argv);
|
|
** Function: Syslog daemon entry point
|
|
*/
|
|
int main(int argc, char **argv)
|
|
{
|
|
char *p, *udpdev, *eol;
|
|
int nfd, kfd, len, fdmax;
|
|
int ch, port = 0;
|
|
fd_set fdset;
|
|
struct nwio_udpopt udpopt;
|
|
struct servent *sp;
|
|
char line[MAXLINE + 1];
|
|
|
|
while ((ch = getopt(argc, argv, "df:m:p:v?")) != EOF) {
|
|
switch ((char) ch) {
|
|
case 'd': /* Debug */
|
|
DbgOpt += 1;
|
|
break;
|
|
case 'f': /* Set configuration file */
|
|
ConfFile = optarg;
|
|
break;
|
|
case 'm': /* Set mark interval */
|
|
MarkInterval = atoi(optarg) * 60;
|
|
break;
|
|
case 'p': /* Set listening port */
|
|
port = atoi(optarg);
|
|
break;
|
|
case 'v': /* Print version */
|
|
fprintf(stderr, "%s version %s\n", ProgName, version);
|
|
return EXIT_FAILURE;
|
|
case '?': /* Help */
|
|
default:
|
|
fprintf(stderr, usage);
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
if (argc -= optind) {
|
|
fprintf(stderr, usage);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
daemonize(line);
|
|
|
|
/* Get the official name of local host. */
|
|
gethostname(LocalHostName, sizeof(LocalHostName) - 1);
|
|
if ((p = strchr(LocalHostName, '.'))) *p = '\0';
|
|
|
|
udpdev = (p = getenv("UDP_DEVICE")) ? p : UDP_DEVICE;
|
|
sp = getservbyname("syslog", "udp");
|
|
|
|
signal(SIGTERM, die);
|
|
signal(SIGINT, DbgOpt ? die : SIG_IGN);
|
|
signal(SIGQUIT, DbgOpt ? die : SIG_IGN);
|
|
signal(SIGALRM, domark);
|
|
|
|
alarm(TIMERINTVL);
|
|
|
|
/* Open UDP device */
|
|
nfd = open(udpdev, O_NONBLOCK | O_RDONLY);
|
|
|
|
/* Configures the UDP device */
|
|
udpopt.nwuo_flags = NWUO_SHARED | NWUO_LP_SET | NWUO_EN_LOC |
|
|
NWUO_DI_BROAD | NWUO_RP_SET | NWUO_RA_SET |
|
|
NWUO_RWDATONLY | NWUO_DI_IPOPT;
|
|
udpopt.nwuo_locport = udpopt.nwuo_remport =
|
|
port == 0 ? sp->s_port : htons(port);
|
|
udpopt.nwuo_remaddr = udpopt.nwuo_locaddr = htonl(0x7F000001L);
|
|
|
|
if(nfd >= 0) {
|
|
while (ioctl(nfd, NWIOSUDPOPT, &udpopt) < 0 ||
|
|
ioctl(nfd, NWIOGUDPOPT, &udpopt) < 0) {
|
|
if (errno == EAGAIN) {
|
|
sleep(1);
|
|
continue;
|
|
}
|
|
logerror("Set/Get UDP options failed");
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
|
|
/* Open kernel log device */
|
|
kfd = open("/dev/klog", O_NONBLOCK | O_RDONLY);
|
|
|
|
if(kfd < 0 && nfd < 0) {
|
|
logerror("open /dev/klog and udp device failed - can't log anything");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
fdmax = max(nfd, kfd) + 1;
|
|
|
|
DEBUG(dprintf("off & running....\n");)
|
|
|
|
init(-1); /* Initilizes log data structures */
|
|
|
|
for (;;) { /* Main loop */
|
|
|
|
FD_ZERO(&fdset); /* Setup descriptors for select */
|
|
if(nfd >= 0) FD_SET(nfd, &fdset);
|
|
if(kfd >= 0) FD_SET(kfd, &fdset);
|
|
|
|
if (select(fdmax, &fdset, NULL, NULL, NULL) <= 0) {
|
|
sleep(1);
|
|
continue;
|
|
|
|
}
|
|
if (nfd >= 0 && FD_ISSET(nfd, &fdset)) {
|
|
|
|
/* Read a message from application programs */
|
|
len = read(nfd, line, MAXLINE);
|
|
if (len > 0) { /* Got a message */
|
|
line[len] = '\0';
|
|
dprintf("got a message (%d, %#x)\n", nfd, len);
|
|
printline(LocalHostName, line);
|
|
|
|
} else if (len < 0) { /* Got an error or signal while reading */
|
|
if (errno != EINTR) /* */
|
|
{
|
|
logerror("Receive error from UDP channel");
|
|
close(nfd);
|
|
nfd= -1;
|
|
}
|
|
|
|
} else { /* (len == 0) Channel has been closed */
|
|
logerror("UDP channel has closed");
|
|
close(nfd);
|
|
die(-1);
|
|
}
|
|
}
|
|
if (kfd >= 0 && FD_ISSET(kfd, &fdset)) {
|
|
static char linebuf[5*1024];
|
|
|
|
/* Read a message from kernel (klog) */
|
|
len = read(kfd, linebuf, sizeof(linebuf)-2);
|
|
dprintf("got a message (%d, %#x)\n", kfd, len);
|
|
for (ch = 0; ch < len; ch += 1)
|
|
if (linebuf[ch] == '\0') linebuf[ch] = ' ';
|
|
if (linebuf[len - 1] == '\n') len -= 1;
|
|
linebuf[len] = '\n';
|
|
linebuf[len + 1] = '\0';
|
|
p = linebuf;
|
|
while(eol = strchr(p, '\n')) {
|
|
*eol = '\0';
|
|
printkline(LocalHostName, p);
|
|
p = eol+1;
|
|
}
|
|
}
|
|
}
|
|
/* Control never gets here */
|
|
}
|
|
|
|
/** syslogd.c **/
|