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Add RFC 5424 syslog message output to syslogd.

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- Move all of the code responsible for transmitting log messages into a
  separate function, fprintlog_write().
- Instead of manually modifying a list of iovecs, add a structure
  iovlist with some helper functions.
- Alter the F_FORW (UDP message forwarding) case to also use iovecs like
  the other cases. Use sendmsg() instead of sendto().
- In the case of F_FORW, truncate the message to a size dependent on the
  address family (AF_INET, AF_INET6), as proposed by RFC 5426.
- Move all traditional message formatting into fprintlog_bsd(). Get rid
  of some of the string copying and snprintf()'ing. Simply emit more
  iovecs to get the job done.
- Increase ttymsg()'s limit of 7 iovecs to 32. Add a definition for this
  limit, so it can be reused by iovlist.
- Add fprintlog_rfc5424() to emit RFC 5424 formatted log entries.
- Add a "-O" command line option to enable RFC 5424 formatting. It would
  have been nicer if we supported "-o rfc5424", just like on NetBSD.
  Unfortunately, the "-o" flag is already used for a different purpose
  on FreeBSD.
- Don't truncate hostnames in the RFC 5424 case, as suggested by that
  specific RFC.

For people interested in using this, this feature can be enabled by
adding the following line to /etc/rc.conf:

  syslogd_flags="-s -O rfc5424"

Differential Revision:	https://reviews.freebsd.org/D15011
This commit is contained in:
Ed Schouten 2018-04-15 08:34:16 +00:00
parent 5bc896bcc2
commit 1a874a126a
4 changed files with 305 additions and 167 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
usr.bin/wall/ttymsg.c
View File

@ -61,7 +61,7 @@ static const char sccsid[] = "@(#)ttymsg.c 8.2 (Berkeley) 11/16/93";
const char * const char *
ttymsg(struct iovec *iov, int iovcnt, const char *line, int tmout) ttymsg(struct iovec *iov, int iovcnt, const char *line, int tmout)
{ {
struct iovec localiov[7]; struct iovec localiov[TTYMSG_IOV_MAX];
ssize_t left, wret; ssize_t left, wret;
int cnt, fd; int cnt, fd;
char device[MAXNAMLEN] = _PATH_DEV; char device[MAXNAMLEN] = _PATH_DEV;

2
usr.bin/wall/ttymsg.h
View File

@ -1,3 +1,5 @@
/* $FreeBSD$ */ /* $FreeBSD$ */
#define TTYMSG_IOV_MAX 32
const char *ttymsg(struct iovec *, int, const char *, int); const char *ttymsg(struct iovec *, int, const char *, int);

17
usr.sbin/syslogd/syslogd.8
View File

@ -28,7 +28,7 @@
.\" @(#)syslogd.8 8.1 (Berkeley) 6/6/93 .\" @(#)syslogd.8 8.1 (Berkeley) 6/6/93
.\" $FreeBSD$ .\" $FreeBSD$
.\" .\"
.Dd November 28, 2017 .Dd April 9, 2018
.Dt SYSLOGD 8 .Dt SYSLOGD 8
.Os .Os
.Sh NAME .Sh NAME
@ -42,6 +42,7 @@
.Op Fl f Ar config_file .Op Fl f Ar config_file
.Op Fl l Oo Ar mode Ns \&: Oc Ns Ar path .Op Fl l Oo Ar mode Ns \&: Oc Ns Ar path
.Op Fl m Ar mark_interval .Op Fl m Ar mark_interval
.Op Fl O Ar format
.Op Fl P Ar pid_file .Op Fl P Ar pid_file
.Op Fl p Ar log_socket .Op Fl p Ar log_socket
.Op Fl S Ar logpriv_socket .Op Fl S Ar logpriv_socket
@ -242,6 +243,20 @@ Usually the
.Dq kern .Dq kern
facility is reserved for messages read directly from facility is reserved for messages read directly from
.Pa /dev/klog . .Pa /dev/klog .
.It Fl O Ar format
Select the output format of generated log messages.
The values
.Ar bsd
and
.Ar rfc3164
are used to generate RFC 3164 log messages.
The values
.Ar syslog
and
.Ar rfc5424
are used to generate RFC 5424 log messages,
having RFC 3339 timestamps with microsecond precision.
The default is to generate RFC 3164 log messages.
.It Fl m Ar mark_interval .It Fl m Ar mark_interval
Select the number of minutes between Select the number of minutes between
.Dq mark .Dq mark

449
usr.sbin/syslogd/syslogd.c
View File

@ -136,6 +136,7 @@ __FBSDID("$FreeBSD$");
#include <netdb.h> #include <netdb.h>
#include <paths.h> #include <paths.h>
#include <signal.h> #include <signal.h>
#include <stdbool.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
@ -367,9 +368,12 @@ static int KeepKernFac; /* Keep remotely logged kernel facility */
static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */ static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */
static struct pidfh *pfh; static struct pidfh *pfh;
static int sigpipe[2]; /* Pipe to catch a signal during select(). */ static int sigpipe[2]; /* Pipe to catch a signal during select(). */
static bool RFC3164OutputFormat = true; /* Use legacy format by default. */
static volatile sig_atomic_t MarkSet, WantDie, WantInitialize, WantReapchild; static volatile sig_atomic_t MarkSet, WantDie, WantInitialize, WantReapchild;
struct iovlist;
static int allowaddr(char *); static int allowaddr(char *);
static int addfile(struct filed *); static int addfile(struct filed *);
static int addpeer(struct peer *); static int addpeer(struct peer *);
@ -386,6 +390,7 @@ static void dofsync(void);
static void domark(int); static void domark(int);
static void fprintlog_first(struct filed *, const char *, const char *, static void fprintlog_first(struct filed *, const char *, const char *,
const char *, const char *, const char *, const char *, int); const char *, const char *, const char *, const char *, int);
static void fprintlog_write(struct filed *, struct iovlist *, int);
static void fprintlog_successive(struct filed *, int); static void fprintlog_successive(struct filed *, int);
static void init(int); static void init(int);
static void logerror(const char *); static void logerror(const char *);
@ -498,7 +503,7 @@ main(int argc, char *argv[])
if (madvise(NULL, 0, MADV_PROTECT) != 0) if (madvise(NULL, 0, MADV_PROTECT) != 0)
dprintf("madvise() failed: %s\n", strerror(errno)); dprintf("madvise() failed: %s\n", strerror(errno));
while ((ch = getopt(argc, argv, "468Aa:b:cCdf:FHkl:m:nNop:P:sS:Tuv")) while ((ch = getopt(argc, argv, "468Aa:b:cCdf:FHkl:m:nNoO:p:P:sS:Tuv"))
!= -1) != -1)
switch (ch) { switch (ch) {
#ifdef INET #ifdef INET
@ -621,6 +626,16 @@ main(int argc, char *argv[])
case 'n': case 'n':
resolve = 0; resolve = 0;
break; break;
case 'O':
if (strcmp(optarg, "bsd") == 0 ||
strcmp(optarg, "rfc3164") == 0)
RFC3164OutputFormat = true;
else if (strcmp(optarg, "syslog") == 0 ||
strcmp(optarg, "rfc5424") == 0)
RFC3164OutputFormat = false;
else
usage();
break;
case 'o': case 'o':
use_bootfile = 1; use_bootfile = 1;
break; break;
@ -880,12 +895,12 @@ static void
usage(void) usage(void)
{ {
fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n", fprintf(stderr,
"usage: syslogd [-468ACcdFHknosTuv] [-a allowed_peer]", "usage: syslogd [-468ACcdFHknosTuv] [-a allowed_peer]\n"
" [-b bind_address] [-f config_file]", " [-b bind_address] [-f config_file]\n"
" [-l [mode:]path] [-m mark_interval]", " [-l [mode:]path] [-m mark_interval]\n"
" [-P pid_file] [-p log_socket]", " [-O format] [-P pid_file] [-p log_socket]\n"
" [-S logpriv_socket]"); " [-S logpriv_socket]\n");
exit(1); exit(1);
} }
@ -1558,177 +1573,114 @@ dofsync(void)
} }
} }
#define IOV_SIZE 7 /*
static void * List of iovecs to which entries can be appended.
fprintlog_first(struct filed *f, const char *hostname, const char *app_name, * Used for constructing the message to be logged.
const char *procid, const char *msgid __unused,
const char *structured_data __unused, const char *msg, int flags)
{
struct iovec iov[IOV_SIZE];
struct addrinfo *r;
int l, lsent = 0;
char tagged_msg[MAXLINE + 1], line[MAXLINE + 1], greetings[200];
char nul[] = "", space[] = " ", lf[] = "\n", crlf[] = "\r\n";
char timebuf[RFC3164_DATELEN + 1];
const char *msgret;
if (strftime(timebuf, sizeof(timebuf), RFC3164_DATEFMT,
&f->f_lasttime.tm) == 0)
timebuf[0] = '\0';
if (f->f_type == F_WALL) {
/* The time displayed is not synchornized with the other log
* destinations (like messages). Following fragment was using
* ctime(&now), which was updating the time every 30 sec.
* With f_lasttime, time is synchronized correctly.
*/ */
iov[0] = (struct iovec){ struct iovlist {
.iov_base = greetings, struct iovec iov[TTYMSG_IOV_MAX];
.iov_len = snprintf(greetings, sizeof(greetings), size_t iovcnt;
"\r\n\7Message from syslogd@%s " size_t totalsize;
"at %.24s ...\r\n", hostname, timebuf) };
};
if (iov[0].iov_len >= sizeof(greetings)) static void
iov[0].iov_len = sizeof(greetings) - 1; iovlist_init(struct iovlist *il)
iov[1] = (struct iovec){ {
.iov_base = nul,
.iov_len = 0 il->iovcnt = 0;
il->totalsize = 0;
}
static void
iovlist_append(struct iovlist *il, const char *str)
{
size_t size;
/* Discard components if we've run out of iovecs. */
if (il->iovcnt < nitems(il->iov)) {
size = strlen(str);
il->iov[il->iovcnt++] = (struct iovec){
.iov_base = __DECONST(char *, str),
.iov_len = size,
}; };
il->totalsize += size;
}
}
static void
iovlist_truncate(struct iovlist *il, size_t size)
{
struct iovec *last;
size_t diff;
while (size > il->totalsize) {
diff = size - il->totalsize;
last = &il->iov[il->iovcnt - 1];
if (diff >= last->iov_len) {
/* Remove the last iovec entirely. */
--il->iovcnt;
il->totalsize -= last->iov_len;
} else { } else {
iov[0] = (struct iovec){ /* Remove the last iovec partially. */
.iov_base = timebuf, last->iov_len -= diff;
.iov_len = strlen(timebuf) il->totalsize -= diff;
};
iov[1] = (struct iovec){
.iov_base = space,
.iov_len = 1
};
} }
}
}
if (LogFacPri) { static void
static char fp_buf[30]; /* Hollow laugh */ fprintlog_write(struct filed *f, struct iovlist *il, int flags)
int fac = f->f_prevpri & LOG_FACMASK; {
int pri = LOG_PRI(f->f_prevpri); struct msghdr msghdr;
const char *f_s = NULL; struct addrinfo *r;
char f_n[5]; /* Hollow laugh */ struct socklist *sl;
const char *p_s = NULL; const char *msgret;
char p_n[5]; /* Hollow laugh */ ssize_t lsent;
if (LogFacPri > 1) {
const CODE *c;
for (c = facilitynames; c->c_name; c++) {
if (c->c_val == fac) {
f_s = c->c_name;
break;
}
}
for (c = prioritynames; c->c_name; c++) {
if (c->c_val == pri) {
p_s = c->c_name;
break;
}
}
}
if (!f_s) {
snprintf(f_n, sizeof f_n, "%d", LOG_FAC(fac));
f_s = f_n;
}
if (!p_s) {
snprintf(p_n, sizeof p_n, "%d", pri);
p_s = p_n;
}
snprintf(fp_buf, sizeof fp_buf, "<%s.%s> ", f_s, p_s);
iov[2] = (struct iovec){
.iov_base = fp_buf,
.iov_len = strlen(fp_buf)
};
} else {
iov[2] = (struct iovec){
.iov_base = nul,
.iov_len = 0
};
}
/* Prepend the application name to the message if provided. */
if (app_name != NULL) {
if (procid != NULL)
snprintf(tagged_msg, sizeof(tagged_msg),
"%s[%s]: %s", app_name, procid, msg);
else
snprintf(tagged_msg, sizeof(tagged_msg),
"%s: %s", app_name, msg);
msg = tagged_msg;
}
iov[3] = (struct iovec){
.iov_base = __DECONST(char *, hostname),
.iov_len = strlen(hostname)
};
iov[4] = (struct iovec){
.iov_base = space,
.iov_len = 1
};
iov[5] = (struct iovec){
.iov_base = __DECONST(char *, msg),
.iov_len = strlen(msg)
};
dprintf("Logging to %s", TypeNames[f->f_type]);
f->f_time = now;
switch (f->f_type) { switch (f->f_type) {
case F_UNUSED:
dprintf("\n");
break;
case F_FORW: case F_FORW:
/* Truncate messages to RFC 5426 recommended size. */
dprintf(" %s", f->fu_forw_hname); dprintf(" %s", f->fu_forw_hname);
switch (f->fu_forw_addr->ai_addr->sa_family) { switch (f->fu_forw_addr->ai_addr->sa_family) {
#ifdef INET #ifdef INET
case AF_INET: case AF_INET:
dprintf(":%d\n", dprintf(":%d\n",
ntohs(satosin(f->fu_forw_addr->ai_addr)->sin_port)); ntohs(satosin(f->fu_forw_addr->ai_addr)->sin_port));
iovlist_truncate(il, 480);
break; break;
#endif #endif
#ifdef INET6 #ifdef INET6
case AF_INET6: case AF_INET6:
dprintf(":%d\n", dprintf(":%d\n",
ntohs(satosin6(f->fu_forw_addr->ai_addr)->sin6_port)); ntohs(satosin6(f->fu_forw_addr->ai_addr)->sin6_port));
iovlist_truncate(il, 1180);
break; break;
#endif #endif
default: default:
dprintf("\n"); dprintf("\n");
} }
/* check for local vs remote messages */
if (strcasecmp(hostname, LocalHostName))
l = snprintf(line, sizeof line - 1,
"<%d>%.15s Forwarded from %s: %s",
f->f_prevpri, (char *)iov[0].iov_base,
hostname, (char *)iov[5].iov_base);
else
l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
f->f_prevpri, (char *)iov[0].iov_base,
(char *)iov[5].iov_base);
if (l < 0)
l = 0;
else if (l > MAXLINE)
l = MAXLINE;
lsent = 0;
for (r = f->fu_forw_addr; r; r = r->ai_next) { for (r = f->fu_forw_addr; r; r = r->ai_next) {
struct socklist *sl; memset(&msghdr, 0, sizeof(msghdr));
msghdr.msg_name = r->ai_addr;
msghdr.msg_namelen = r->ai_addrlen;
msghdr.msg_iov = il->iov;
msghdr.msg_iovlen = il->iovcnt;
STAILQ_FOREACH(sl, &shead, next) { STAILQ_FOREACH(sl, &shead, next) {
if (sl->sl_ss.ss_family == AF_LOCAL || if (sl->sl_ss.ss_family == AF_LOCAL ||
sl->sl_ss.ss_family == AF_UNSPEC || sl->sl_ss.ss_family == AF_UNSPEC ||
sl->sl_socket < 0) sl->sl_socket < 0)
continue; continue;
lsent = sendto(sl->sl_socket, line, l, 0, lsent = sendmsg(sl->sl_socket, &msghdr, 0);
r->ai_addr, r->ai_addrlen); if (lsent == (ssize_t)il->totalsize)
if (lsent == l)
break; break;
} }
if (lsent == l && !send_to_all) if (lsent == (ssize_t)il->totalsize && !send_to_all)
break; break;
} }
dprintf("lsent/l: %d/%d\n", lsent, l); dprintf("lsent/totalsize: %zd/%zu\n", lsent, il->totalsize);
if (lsent != l) { if (lsent != (ssize_t)il->totalsize) {
int e = errno; int e = errno;
logerror("sendto"); logerror("sendto");
errno = e; errno = e;
@ -1758,11 +1710,8 @@ fprintlog_first(struct filed *f, const char *hostname, const char *app_name,
case F_FILE: case F_FILE:
dprintf(" %s\n", f->fu_fname); dprintf(" %s\n", f->fu_fname);
iov[6] = (struct iovec){ iovlist_append(il, "\n");
.iov_base = lf, if (writev(f->f_file, il->iov, il->iovcnt) < 0) {
.iov_len = 1
};
if (writev(f->f_file, iov, nitems(iov)) < 0) {
/* /*
* If writev(2) fails for potentially transient errors * If writev(2) fails for potentially transient errors
* like the filesystem being full, ignore it. * like the filesystem being full, ignore it.
@ -1782,10 +1731,7 @@ fprintlog_first(struct filed *f, const char *hostname, const char *app_name,
case F_PIPE: case F_PIPE:
dprintf(" %s\n", f->fu_pipe_pname); dprintf(" %s\n", f->fu_pipe_pname);
iov[6] = (struct iovec){ iovlist_append(il, "\n");
.iov_base = lf,
.iov_len = 1
};
if (f->fu_pipe_pid == 0) { if (f->fu_pipe_pid == 0) {
if ((f->f_file = p_open(f->fu_pipe_pname, if ((f->f_file = p_open(f->fu_pipe_pname,
&f->fu_pipe_pid)) < 0) { &f->fu_pipe_pid)) < 0) {
@ -1793,7 +1739,7 @@ fprintlog_first(struct filed *f, const char *hostname, const char *app_name,
break; break;
} }
} }
if (writev(f->f_file, iov, nitems(iov)) < 0) { if (writev(f->f_file, il->iov, il->iovcnt) < 0) {
int e = errno; int e = errno;
deadq_enter(f->fu_pipe_pid, f->fu_pipe_pname); deadq_enter(f->fu_pipe_pid, f->fu_pipe_pname);
@ -1812,12 +1758,9 @@ fprintlog_first(struct filed *f, const char *hostname, const char *app_name,
case F_TTY: case F_TTY:
dprintf(" %s%s\n", _PATH_DEV, f->fu_fname); dprintf(" %s%s\n", _PATH_DEV, f->fu_fname);
iov[6] = (struct iovec){ iovlist_append(il, "\r\n");
.iov_base = crlf,
.iov_len = 2
};
errno = 0; /* ttymsg() only sometimes returns an errno */ errno = 0; /* ttymsg() only sometimes returns an errno */
if ((msgret = ttymsg(iov, nitems(iov), f->fu_fname, 10))) { if ((msgret = ttymsg(il->iov, il->iovcnt, f->fu_fname, 10))) {
f->f_type = F_UNUSED; f->f_type = F_UNUSED;
logerror(msgret); logerror(msgret);
} }
@ -1826,14 +1769,190 @@ fprintlog_first(struct filed *f, const char *hostname, const char *app_name,
case F_USERS: case F_USERS:
case F_WALL: case F_WALL:
dprintf("\n"); dprintf("\n");
iov[6] = (struct iovec){ iovlist_append(il, "\r\n");
.iov_base = crlf, wallmsg(f, il->iov, il->iovcnt);
.iov_len = 2
};
wallmsg(f, iov, nitems(iov));
break; break;
} }
}
static void
fprintlog_rfc5424(struct filed *f, const char *hostname, const char *app_name,
const char *procid, const char *msgid, const char *structured_data,
const char *msg, int flags)
{
struct iovlist il;
suseconds_t usec;
int i;
char timebuf[33], priority_number[5];
iovlist_init(&il);
if (f->f_type == F_WALL)
iovlist_append(&il, "\r\n\aMessage from syslogd ...\r\n");
iovlist_append(&il, "<");
snprintf(priority_number, sizeof(priority_number), "%d", f->f_prevpri);
iovlist_append(&il, priority_number);
iovlist_append(&il, ">1 ");
if (strftime(timebuf, sizeof(timebuf), "%FT%T.______%z",
&f->f_lasttime.tm) == sizeof(timebuf) - 2) {
/* Add colon to the time zone offset, which %z doesn't do. */
timebuf[32] = '\0';
timebuf[31] = timebuf[30];
timebuf[30] = timebuf[29];
timebuf[29] = ':';
/* Overwrite space for microseconds with actual value. */
usec = f->f_lasttime.usec;
for (i = 25; i >= 20; --i) {
timebuf[i] = usec % 10 + '0';
usec /= 10;
}
iovlist_append(&il, timebuf);
} else
iovlist_append(&il, "-");
iovlist_append(&il, " ");
iovlist_append(&il, hostname);
iovlist_append(&il, " ");
iovlist_append(&il, app_name == NULL ? "-" : app_name);
iovlist_append(&il, " ");
iovlist_append(&il, procid == NULL ? "-" : procid);
iovlist_append(&il, " ");
iovlist_append(&il, msgid == NULL ? "-" : msgid);
iovlist_append(&il, " ");
iovlist_append(&il, structured_data == NULL ? "-" : structured_data);
iovlist_append(&il, " ");
iovlist_append(&il, msg);
fprintlog_write(f, &il, flags);
}
static void
fprintlog_rfc3164(struct filed *f, const char *hostname, const char *app_name,
const char *procid, const char *msg, int flags)
{
struct iovlist il;
const CODE *c;
int facility, priority;
char timebuf[RFC3164_DATELEN + 1], facility_number[5],
priority_number[5];
bool facility_found, priority_found;
if (strftime(timebuf, sizeof(timebuf), RFC3164_DATEFMT,
&f->f_lasttime.tm) == 0)
timebuf[0] = '\0';
iovlist_init(&il);
switch (f->f_type) {
case F_FORW:
/* Message forwarded over the network. */
iovlist_append(&il, "<");
snprintf(priority_number, sizeof(priority_number), "%d",
f->f_prevpri);
iovlist_append(&il, priority_number);
iovlist_append(&il, ">");
iovlist_append(&il, timebuf);
if (strcasecmp(hostname, LocalHostName) != 0) {
iovlist_append(&il, " Forwarded from ");
iovlist_append(&il, hostname);
iovlist_append(&il, ":");
}
iovlist_append(&il, " ");
break;
case F_WALL:
/* Message written to terminals. */
iovlist_append(&il, "\r\n\aMessage from syslogd@");
iovlist_append(&il, hostname);
iovlist_append(&il, " at ");
iovlist_append(&il, timebuf);
iovlist_append(&il, " ...\r\n");
break;
default:
/* Message written to files. */
iovlist_append(&il, timebuf);
iovlist_append(&il, " ");
iovlist_append(&il, hostname);
iovlist_append(&il, " ");
if (LogFacPri) {
iovlist_append(&il, "<");
facility = f->f_prevpri & LOG_FACMASK;
facility_found = false;
if (LogFacPri > 1) {
for (c = facilitynames; c->c_name; c++) {
if (c->c_val == facility) {
iovlist_append(&il, c->c_name);
facility_found = true;
break;
}
}
}
if (!facility_found) {
snprintf(facility_number,
sizeof(facility_number), "%d",
LOG_FAC(facility));
iovlist_append(&il, facility_number);
}
iovlist_append(&il, ".");
priority = LOG_PRI(f->f_prevpri);
priority_found = false;
if (LogFacPri > 1) {
for (c = prioritynames; c->c_name; c++) {
if (c->c_val == priority) {
iovlist_append(&il, c->c_name);
priority_found = true;
break;
}
}
}
if (!priority_found) {
snprintf(priority_number,
sizeof(priority_number), "%d", priority);
iovlist_append(&il, priority_number);
}
iovlist_append(&il, "> ");
}
break;
}
/* Message body with application name and process ID prefixed. */
if (app_name != NULL) {
iovlist_append(&il, app_name);
if (procid != NULL) {
iovlist_append(&il, "[");
iovlist_append(&il, procid);
iovlist_append(&il, "]");
}
iovlist_append(&il, ": ");
}
iovlist_append(&il, msg);
fprintlog_write(f, &il, flags);
}
static void
fprintlog_first(struct filed *f, const char *hostname, const char *app_name,
const char *procid, const char *msgid __unused,
const char *structured_data __unused, const char *msg, int flags)
{
dprintf("Logging to %s", TypeNames[f->f_type]);
f->f_time = now;
f->f_prevcount = 0; f->f_prevcount = 0;
if (f->f_type == F_UNUSED) {
dprintf("\n");
return;
}
if (RFC3164OutputFormat)
fprintlog_rfc3164(f, hostname, app_name, procid, msg, flags);
else
fprintlog_rfc5424(f, hostname, app_name, procid, msgid,
structured_data, msg, flags);
} }
/* /*
@ -2229,8 +2348,10 @@ init(int signo)
if (gethostname(LocalHostName, sizeof(LocalHostName))) if (gethostname(LocalHostName, sizeof(LocalHostName)))
err(EX_OSERR, "gethostname() failed"); err(EX_OSERR, "gethostname() failed");
if ((p = strchr(LocalHostName, '.')) != NULL) { if ((p = strchr(LocalHostName, '.')) != NULL) {
*p++ = '\0'; /* RFC 5424 prefers logging FQDNs. */
LocalDomain = p; if (RFC3164OutputFormat)
*p = '\0';
LocalDomain = p + 1;
} else { } else {
LocalDomain = ""; LocalDomain = "";
} }