1 /* 2 * Copyright (c) 2015, Juniper Networks, Inc. 3 * All rights reserved. 4 * This SOFTWARE is licensed under the LICENSE provided in the 5 * ../Copyright file. By downloading, installing, copying, or otherwise 6 * using the SOFTWARE, you agree to be bound by the terms of that 7 * LICENSE. 8 * Phil Shafer, June 2015 9 */ 10 11 /* 12 * Portions of this file are: 13 * Copyright (c) 1983, 1988, 1993 14 * The Regents of the University of California. All rights reserved. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #include <sys/cdefs.h> 42 #include <sys/types.h> 43 #include <sys/socket.h> 44 #include <sys/syslog.h> 45 #include <sys/uio.h> 46 #include <sys/un.h> 47 #include <netdb.h> 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <paths.h> 51 #include <pthread.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <time.h> 56 #include <limits.h> 57 #include <unistd.h> 58 #include <stdarg.h> 59 #include <sys/time.h> 60 #include <sys/types.h> 61 #include <sys/sysctl.h> 62 63 #include "xo_config.h" 64 #include "xo.h" 65 #include "xo_encoder.h" /* For xo_realloc */ 66 #include "xo_buf.h" 67 68 /* 69 * SYSLOG (RFC 5424) requires an enterprise identifier. This turns 70 * out to be a fickle little issue. For a single-vendor box, the 71 * system should have a single EID that all software can use. When 72 * VendorX turns FreeBSD into a product, all software (kernel and 73 * utilities) should report VendorX's EID. But when software is 74 * installed on top of an external operating system, the application 75 * should report it's own EID, distinct from the base OS. 76 * 77 * To make this happen, the kernel should support a sysctl to assign a 78 * custom enterprise-id ("kern.syslog.enterprise_id"). libxo then 79 * allows an application to set a custom EID to override that system 80 * wide value, if needed. 81 * 82 * We try to set the stock IANA assigned Enterprise ID value for the 83 * vendors we know about (FreeBSD, macosx), but fallback to the 84 * "example" EID defined by IANA. See: 85 * https://www.iana.org/assignments/enterprise-numbers/enterprise-numbers 86 */ 87 88 #define XO_SYSLOG_ENTERPRISE_ID "kern.syslog.enterprise_id" 89 90 #if defined(__FreeBSD__) 91 #define XO_DEFAULT_EID 2238 92 #elif defined(__macosx__) 93 #define XO_DEFAULT_EID 63 94 #else 95 #define XO_DEFAULT_EID 32473 /* Fallback to the "example" number */ 96 #endif 97 98 #ifndef HOST_NAME_MAX 99 #ifdef _SC_HOST_NAME_MAX 100 #define HOST_NAME_MAX _SC_HOST_NAME_MAX 101 #else 102 #define HOST_NAME_MAX 255 103 #endif /* _SC_HOST_NAME_MAX */ 104 #endif /* HOST_NAME_MAX */ 105 106 #ifndef UNUSED 107 #define UNUSED __attribute__ ((__unused__)) 108 #endif /* UNUSED */ 109 110 static int xo_logfile = -1; /* fd for log */ 111 static int xo_status; /* connection xo_status */ 112 static int xo_opened; /* have done openlog() */ 113 static int xo_logstat = 0; /* xo_status bits, set by openlog() */ 114 static const char *xo_logtag = NULL; /* string to tag the entry with */ 115 static int xo_logfacility = LOG_USER; /* default facility code */ 116 static int xo_logmask = 0xff; /* mask of priorities to be logged */ 117 static pthread_mutex_t xo_syslog_mutex UNUSED = PTHREAD_MUTEX_INITIALIZER; 118 static int xo_unit_test; /* Fake data for unit test */ 119 120 #define REAL_VOID(_x) \ 121 do { int really_ignored = _x; if (really_ignored) { }} while (0) 122 123 #if !defined(HAVE_DECL___ISTHREADED) || !HAVE_DECL___ISTHREADED 124 #define __isthreaded 1 125 #endif 126 127 #define THREAD_LOCK() \ 128 do { \ 129 if (__isthreaded) pthread_mutex_lock(&xo_syslog_mutex); \ 130 } while(0) 131 #define THREAD_UNLOCK() \ 132 do { \ 133 if (__isthreaded) pthread_mutex_unlock(&xo_syslog_mutex); \ 134 } while(0) 135 136 static void xo_disconnect_log(void); /* disconnect from syslogd */ 137 static void xo_connect_log(void); /* (re)connect to syslogd */ 138 static void xo_open_log_unlocked(const char *, int, int); 139 140 enum { 141 NOCONN = 0, 142 CONNDEF, 143 CONNPRIV, 144 }; 145 146 static xo_syslog_open_t xo_syslog_open; 147 static xo_syslog_send_t xo_syslog_send; 148 static xo_syslog_close_t xo_syslog_close; 149 150 static char xo_syslog_enterprise_id[12]; 151 152 /* 153 * Record an enterprise ID, which functions as a namespace for syslog 154 * messages. The value is pre-formatted into a string. This allows 155 * applications to customize their syslog message set, when needed. 156 */ 157 void 158 xo_set_syslog_enterprise_id (unsigned short eid) 159 { 160 snprintf(xo_syslog_enterprise_id, sizeof(xo_syslog_enterprise_id), 161 "%u", eid); 162 } 163 164 /* 165 * Handle the work of transmitting the syslog message 166 */ 167 static void 168 xo_send_syslog (char *full_msg, char *v0_hdr, 169 char *text_only) 170 { 171 if (xo_syslog_send) { 172 xo_syslog_send(full_msg, v0_hdr, text_only); 173 return; 174 } 175 176 int fd; 177 int full_len = strlen(full_msg); 178 179 /* Output to stderr if requested, then we've been passed a v0 header */ 180 if (v0_hdr) { 181 struct iovec iov[3]; 182 struct iovec *v = iov; 183 char newline[] = "\n"; 184 185 v->iov_base = v0_hdr; 186 v->iov_len = strlen(v0_hdr); 187 v += 1; 188 v->iov_base = text_only; 189 v->iov_len = strlen(text_only); 190 v += 1; 191 v->iov_base = newline; 192 v->iov_len = 1; 193 v += 1; 194 REAL_VOID(writev(STDERR_FILENO, iov, 3)); 195 } 196 197 /* Get connected, output the message to the local logger. */ 198 if (!xo_opened) 199 xo_open_log_unlocked(xo_logtag, xo_logstat | LOG_NDELAY, 0); 200 xo_connect_log(); 201 202 /* 203 * If the send() fails, there are two likely scenarios: 204 * 1) syslogd was restarted 205 * 2) /var/run/log is out of socket buffer space, which 206 * in most cases means local DoS. 207 * If the error does not indicate a full buffer, we address 208 * case #1 by attempting to reconnect to /var/run/log[priv] 209 * and resending the message once. 210 * 211 * If we are working with a privileged socket, the retry 212 * attempts end there, because we don't want to freeze a 213 * critical application like su(1) or sshd(8). 214 * 215 * Otherwise, we address case #2 by repeatedly retrying the 216 * send() to give syslogd a chance to empty its socket buffer. 217 */ 218 219 if (send(xo_logfile, full_msg, full_len, 0) < 0) { 220 if (errno != ENOBUFS) { 221 /* 222 * Scenario 1: syslogd was restarted 223 * reconnect and resend once 224 */ 225 xo_disconnect_log(); 226 xo_connect_log(); 227 if (send(xo_logfile, full_msg, full_len, 0) >= 0) { 228 return; 229 } 230 /* 231 * if the resend failed, fall through to 232 * possible scenario 2 233 */ 234 } 235 while (errno == ENOBUFS) { 236 /* 237 * Scenario 2: out of socket buffer space 238 * possible DoS, fail fast on a privileged 239 * socket 240 */ 241 if (xo_status == CONNPRIV) 242 break; 243 usleep(1); 244 if (send(xo_logfile, full_msg, full_len, 0) >= 0) { 245 return; 246 } 247 } 248 } else { 249 return; 250 } 251 252 /* 253 * Output the message to the console; try not to block 254 * as a blocking console should not stop other processes. 255 * Make sure the error reported is the one from the syslogd failure. 256 */ 257 int flags = O_WRONLY | O_NONBLOCK; 258 #ifdef O_CLOEXEC 259 flags |= O_CLOEXEC; 260 #endif /* O_CLOEXEC */ 261 262 if (xo_logstat & LOG_CONS 263 && (fd = open(_PATH_CONSOLE, flags, 0)) >= 0) { 264 struct iovec iov[2]; 265 struct iovec *v = iov; 266 char crnl[] = "\r\n"; 267 char *p; 268 269 p = strchr(full_msg, '>') + 1; 270 v->iov_base = p; 271 v->iov_len = full_len - (p - full_msg); 272 ++v; 273 v->iov_base = crnl; 274 v->iov_len = 2; 275 REAL_VOID(writev(fd, iov, 2)); 276 (void) close(fd); 277 } 278 } 279 280 /* Should be called with mutex acquired */ 281 static void 282 xo_disconnect_log (void) 283 { 284 if (xo_syslog_close) { 285 xo_syslog_close(); 286 return; 287 } 288 289 /* 290 * If the user closed the FD and opened another in the same slot, 291 * that's their problem. They should close it before calling on 292 * system services. 293 */ 294 if (xo_logfile != -1) { 295 close(xo_logfile); 296 xo_logfile = -1; 297 } 298 xo_status = NOCONN; /* retry connect */ 299 } 300 301 /* Should be called with mutex acquired */ 302 static void 303 xo_connect_log (void) 304 { 305 if (xo_syslog_open) { 306 xo_syslog_open(); 307 return; 308 } 309 310 struct sockaddr_un saddr; /* AF_UNIX address of local logger */ 311 312 if (xo_logfile == -1) { 313 int flags = SOCK_DGRAM; 314 #ifdef SOCK_CLOEXEC 315 flags |= SOCK_CLOEXEC; 316 #endif /* SOCK_CLOEXEC */ 317 if ((xo_logfile = socket(AF_UNIX, flags, 0)) == -1) 318 return; 319 } 320 if (xo_logfile != -1 && xo_status == NOCONN) { 321 #ifdef HAVE_SUN_LEN 322 saddr.sun_len = sizeof(saddr); 323 #endif /* HAVE_SUN_LEN */ 324 saddr.sun_family = AF_UNIX; 325 326 /* 327 * First try privileged socket. If no success, 328 * then try default socket. 329 */ 330 331 #ifdef _PATH_LOG_PRIV 332 (void) strncpy(saddr.sun_path, _PATH_LOG_PRIV, 333 sizeof saddr.sun_path); 334 if (connect(xo_logfile, (struct sockaddr *) &saddr, 335 sizeof(saddr)) != -1) 336 xo_status = CONNPRIV; 337 #endif /* _PATH_LOG_PRIV */ 338 339 #ifdef _PATH_LOG 340 if (xo_status == NOCONN) { 341 (void) strncpy(saddr.sun_path, _PATH_LOG, 342 sizeof saddr.sun_path); 343 if (connect(xo_logfile, (struct sockaddr *)&saddr, 344 sizeof(saddr)) != -1) 345 xo_status = CONNDEF; 346 } 347 #endif /* _PATH_LOG */ 348 349 #ifdef _PATH_OLDLOG 350 if (xo_status == NOCONN) { 351 /* 352 * Try the old "/dev/log" path, for backward 353 * compatibility. 354 */ 355 (void) strncpy(saddr.sun_path, _PATH_OLDLOG, 356 sizeof saddr.sun_path); 357 if (connect(xo_logfile, (struct sockaddr *)&saddr, 358 sizeof(saddr)) != -1) 359 xo_status = CONNDEF; 360 } 361 #endif /* _PATH_OLDLOG */ 362 363 if (xo_status == NOCONN) { 364 (void) close(xo_logfile); 365 xo_logfile = -1; 366 } 367 } 368 } 369 370 static void 371 xo_open_log_unlocked (const char *ident, int logstat, int logfac) 372 { 373 if (ident != NULL) 374 xo_logtag = ident; 375 xo_logstat = logstat; 376 if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0) 377 xo_logfacility = logfac; 378 379 if (xo_logstat & LOG_NDELAY) /* open immediately */ 380 xo_connect_log(); 381 382 xo_opened = 1; /* ident and facility has been set */ 383 } 384 385 void 386 xo_open_log (const char *ident, int logstat, int logfac) 387 { 388 THREAD_LOCK(); 389 xo_open_log_unlocked(ident, logstat, logfac); 390 THREAD_UNLOCK(); 391 } 392 393 394 void 395 xo_close_log (void) 396 { 397 THREAD_LOCK(); 398 if (xo_logfile != -1) { 399 (void) close(xo_logfile); 400 xo_logfile = -1; 401 } 402 xo_logtag = NULL; 403 xo_status = NOCONN; 404 THREAD_UNLOCK(); 405 } 406 407 /* xo_set_logmask -- set the log mask level */ 408 int 409 xo_set_logmask (int pmask) 410 { 411 int omask; 412 413 THREAD_LOCK(); 414 omask = xo_logmask; 415 if (pmask != 0) 416 xo_logmask = pmask; 417 THREAD_UNLOCK(); 418 return (omask); 419 } 420 421 void 422 xo_set_syslog_handler (xo_syslog_open_t open_func, 423 xo_syslog_send_t send_func, 424 xo_syslog_close_t close_func) 425 { 426 xo_syslog_open = open_func; 427 xo_syslog_send = send_func; 428 xo_syslog_close = close_func; 429 } 430 431 static ssize_t 432 xo_snprintf (char *out, ssize_t outsize, const char *fmt, ...) 433 { 434 ssize_t status; 435 ssize_t retval = 0; 436 va_list ap; 437 438 if (out && outsize) { 439 va_start(ap, fmt); 440 status = vsnprintf(out, outsize, fmt, ap); 441 if (status < 0) { /* this should never happen, */ 442 *out = 0; /* handle it in the safest way possible if it does */ 443 retval = 0; 444 } else { 445 retval = status; 446 retval = retval > outsize ? outsize : retval; 447 } 448 va_end(ap); 449 } 450 451 return retval; 452 } 453 454 static xo_ssize_t 455 xo_syslog_handle_write (void *opaque, const char *data) 456 { 457 xo_buffer_t *xbp = opaque; 458 int len = strlen(data); 459 int left = xo_buf_left(xbp); 460 461 if (len > left - 1) 462 len = left - 1; 463 464 memcpy(xbp->xb_curp, data, len); 465 xbp->xb_curp += len; 466 *xbp->xb_curp = '\0'; 467 468 return len; 469 } 470 471 static void 472 xo_syslog_handle_close (void *opaque UNUSED) 473 { 474 } 475 476 static int 477 xo_syslog_handle_flush (void *opaque UNUSED) 478 { 479 return 0; 480 } 481 482 void 483 xo_set_unit_test_mode (int value) 484 { 485 xo_unit_test = value; 486 } 487 488 void 489 xo_vsyslog (int pri, const char *name, const char *fmt, va_list vap) 490 { 491 int saved_errno = errno; 492 char tbuf[2048]; 493 char *tp = NULL, *ep = NULL; 494 unsigned start_of_msg = 0; 495 char *v0_hdr = NULL; 496 xo_buffer_t xb; 497 static pid_t my_pid; 498 unsigned log_offset; 499 500 if (my_pid == 0) 501 my_pid = xo_unit_test ? 222 : getpid(); 502 503 /* Check for invalid bits */ 504 if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) { 505 xo_syslog(LOG_ERR | LOG_CONS | LOG_PERROR | LOG_PID, 506 "syslog-unknown-priority", 507 "syslog: unknown facility/priority: %#x", pri); 508 pri &= LOG_PRIMASK|LOG_FACMASK; 509 } 510 511 THREAD_LOCK(); 512 513 /* Check priority against setlogmask values. */ 514 if (!(LOG_MASK(LOG_PRI(pri)) & xo_logmask)) { 515 THREAD_UNLOCK(); 516 return; 517 } 518 519 /* Set default facility if none specified. */ 520 if ((pri & LOG_FACMASK) == 0) 521 pri |= xo_logfacility; 522 523 /* Create the primary stdio hook */ 524 xb.xb_bufp = tbuf; 525 xb.xb_curp = tbuf; 526 xb.xb_size = sizeof(tbuf); 527 528 xo_handle_t *xop = xo_create(XO_STYLE_SDPARAMS, 0); 529 if (xop == NULL) { 530 THREAD_UNLOCK(); 531 return; 532 } 533 534 #ifdef HAVE_GETPROGNAME 535 if (xo_logtag == NULL) 536 xo_logtag = getprogname(); 537 #endif /* HAVE_GETPROGNAME */ 538 539 xo_set_writer(xop, &xb, xo_syslog_handle_write, xo_syslog_handle_close, 540 xo_syslog_handle_flush); 541 542 /* Build the message; start by getting the time */ 543 struct tm tm; 544 struct timeval tv; 545 546 /* Unit test hack: fake a fixed time */ 547 if (xo_unit_test) { 548 tv.tv_sec = 1435085229; 549 tv.tv_usec = 123456; 550 } else 551 gettimeofday(&tv, NULL); 552 553 (void) localtime_r(&tv.tv_sec, &tm); 554 555 if (xo_logstat & LOG_PERROR) { 556 /* 557 * For backwards compatibility, we need to make the old-style 558 * message. This message can be emitted to the console/tty. 559 */ 560 v0_hdr = alloca(2048); 561 tp = v0_hdr; 562 ep = v0_hdr + 2048; 563 564 if (xo_logtag != NULL) 565 tp += xo_snprintf(tp, ep - tp, "%s", xo_logtag); 566 if (xo_logstat & LOG_PID) 567 tp += xo_snprintf(tp, ep - tp, "[%d]", my_pid); 568 if (xo_logtag) 569 tp += xo_snprintf(tp, ep - tp, ": "); 570 } 571 572 log_offset = xb.xb_curp - xb.xb_bufp; 573 574 /* Add PRI, PRIVAL, and VERSION */ 575 xb.xb_curp += xo_snprintf(xb.xb_curp, xo_buf_left(&xb), "<%d>1 ", pri); 576 577 /* Add TIMESTAMP with milliseconds and TZOFFSET */ 578 xb.xb_curp += strftime(xb.xb_curp, xo_buf_left(&xb), "%FT%T", &tm); 579 xb.xb_curp += xo_snprintf(xb.xb_curp, xo_buf_left(&xb), 580 ".%03.3u", tv.tv_usec / 1000); 581 xb.xb_curp += strftime(xb.xb_curp, xo_buf_left(&xb), "%z ", &tm); 582 583 /* 584 * Add HOSTNAME; we rely on gethostname and don't fluff with 585 * ip addresses. Might need to revisit..... 586 */ 587 char hostname[HOST_NAME_MAX]; 588 hostname[0] = '\0'; 589 if (xo_unit_test) 590 strcpy(hostname, "worker-host"); 591 else 592 (void) gethostname(hostname, sizeof(hostname)); 593 594 xb.xb_curp += xo_snprintf(xb.xb_curp, xo_buf_left(&xb), "%s ", 595 hostname[0] ? hostname : "-"); 596 597 /* Add APP-NAME */ 598 xb.xb_curp += xo_snprintf(xb.xb_curp, xo_buf_left(&xb), "%s ", 599 xo_logtag ?: "-"); 600 601 /* Add PROCID */ 602 xb.xb_curp += xo_snprintf(xb.xb_curp, xo_buf_left(&xb), "%d ", my_pid); 603 604 /* 605 * Add MSGID. The user should provide us with a name, which we 606 * prefix with the current enterprise ID, as learned from the kernel. 607 * If the kernel won't tell us, we use the stock/builtin number. 608 */ 609 char *buf UNUSED = NULL; 610 const char *eid = xo_syslog_enterprise_id; 611 const char *at_sign = "@"; 612 613 if (name == NULL) { 614 name = "-"; 615 eid = at_sign = ""; 616 617 } else if (*name == '@') { 618 /* Our convention is to prefix IANA-defined names with an "@" */ 619 name += 1; 620 eid = at_sign = ""; 621 622 } else if (eid[0] == '\0') { 623 #ifdef HAVE_SYSCTLBYNAME 624 /* 625 * See if the kernel knows the sysctl for the enterprise ID 626 */ 627 size_t size = 0; 628 if (sysctlbyname(XO_SYSLOG_ENTERPRISE_ID, NULL, &size, NULL, 0) == 0 629 && size > 0) { 630 buf = alloca(size); 631 if (sysctlbyname(XO_SYSLOG_ENTERPRISE_ID, buf, &size, NULL, 0) == 0 632 && size > 0) 633 eid = buf; 634 } 635 #endif /* HAVE_SYSCTLBYNAME */ 636 637 if (eid[0] == '\0') { 638 /* Fallback to our base default */ 639 xo_set_syslog_enterprise_id(XO_DEFAULT_EID); 640 eid = xo_syslog_enterprise_id; 641 } 642 } 643 644 xb.xb_curp += xo_snprintf(xb.xb_curp, xo_buf_left(&xb), "%s [%s%s%s ", 645 name, name, at_sign, eid); 646 647 /* 648 * Now for the real content. We make two distinct passes thru the 649 * xo_emit engine, first for the SD-PARAMS and then for the text 650 * message. 651 */ 652 va_list ap; 653 va_copy(ap, vap); 654 655 errno = saved_errno; /* Restore saved error value */ 656 xo_emit_hv(xop, fmt, ap); 657 xo_flush_h(xop); 658 659 va_end(ap); 660 661 /* Trim trailing space */ 662 if (xb.xb_curp[-1] == ' ') 663 xb.xb_curp -= 1; 664 665 /* Close the structured data (SD-ELEMENT) */ 666 xb.xb_curp += xo_snprintf(xb.xb_curp, xo_buf_left(&xb), "] "); 667 668 /* 669 * Since our MSG is known to be UTF-8, we MUST prefix it with 670 * that most-annoying-of-all-UTF-8 features, the BOM (0xEF.BB.BF). 671 */ 672 xb.xb_curp += xo_snprintf(xb.xb_curp, xo_buf_left(&xb), 673 "%c%c%c", 0xEF, 0xBB, 0xBF); 674 675 /* Save the start of the message */ 676 if (xo_logstat & LOG_PERROR) 677 start_of_msg = xb.xb_curp - xb.xb_bufp; 678 679 xo_set_style(xop, XO_STYLE_TEXT); 680 xo_set_flags(xop, XOF_UTF8); 681 682 errno = saved_errno; /* Restore saved error value */ 683 xo_emit_hv(xop, fmt, ap); 684 xo_flush_h(xop); 685 686 /* Remove a trailing newline */ 687 if (xb.xb_curp[-1] == '\n') 688 *--xb.xb_curp = '\0'; 689 690 if (xo_get_flags(xop) & XOF_LOG_SYSLOG) 691 fprintf(stderr, "xo: syslog: %s\n", xb.xb_bufp + log_offset); 692 693 xo_send_syslog(xb.xb_bufp, v0_hdr, xb.xb_bufp + start_of_msg); 694 695 xo_destroy(xop); 696 697 THREAD_UNLOCK(); 698 } 699 700 /* 701 * syslog - print message on log file; output is intended for syslogd(8). 702 */ 703 void 704 xo_syslog (int pri, const char *name, const char *fmt, ...) 705 { 706 va_list ap; 707 708 va_start(ap, fmt); 709 xo_vsyslog(pri, name, fmt, ap); 710 va_end(ap); 711 } 712