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1.1 ! root 1: /* ! 2: * Copyright (c) 1983, 1988 Regents of the University of California. ! 3: * All rights reserved. ! 4: * ! 5: * Redistribution and use in source and binary forms are permitted ! 6: * provided that the above copyright notice and this paragraph are ! 7: * duplicated in all such forms and that any documentation, ! 8: * advertising materials, and other materials related to such ! 9: * distribution and use acknowledge that the software was developed ! 10: * by the University of California, Berkeley. The name of the ! 11: * University may not be used to endorse or promote products derived ! 12: * from this software without specific prior written permission. ! 13: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR ! 14: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED ! 15: * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. ! 16: */ ! 17: ! 18: #ifndef lint ! 19: char copyright[] = ! 20: "@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\ ! 21: All rights reserved.\n"; ! 22: #endif /* not lint */ ! 23: ! 24: #ifndef lint ! 25: static char sccsid[] = "@(#)syslogd.c 5.24 (Berkeley) 6/18/88"; ! 26: #endif /* not lint */ ! 27: ! 28: /* ! 29: * syslogd -- log system messages ! 30: * ! 31: * This program implements a system log. It takes a series of lines. ! 32: * Each line may have a priority, signified as "<n>" as ! 33: * the first characters of the line. If this is ! 34: * not present, a default priority is used. ! 35: * ! 36: * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will ! 37: * cause it to reread its configuration file. ! 38: * ! 39: * Defined Constants: ! 40: * ! 41: * MAXLINE -- the maximimum line length that can be handled. ! 42: * DEFUPRI -- the default priority for user messages ! 43: * DEFSPRI -- the default priority for kernel messages ! 44: * ! 45: * Author: Eric Allman ! 46: * extensive changes by Ralph Campbell ! 47: * more extensive changes by Eric Allman (again) ! 48: */ ! 49: ! 50: #define MAXLINE 1024 /* maximum line length */ ! 51: #define MAXSVLINE 120 /* maximum saved line length */ ! 52: #define DEFUPRI (LOG_USER|LOG_NOTICE) ! 53: #define DEFSPRI (LOG_KERN|LOG_CRIT) ! 54: #define TIMERINTVL 30 /* interval for checking flush, mark */ ! 55: ! 56: #include <stdio.h> ! 57: #include <utmp.h> ! 58: #include <ctype.h> ! 59: #include <strings.h> ! 60: #include <setjmp.h> ! 61: ! 62: #include <sys/syslog.h> ! 63: #include <sys/param.h> ! 64: #include <sys/errno.h> ! 65: #include <sys/ioctl.h> ! 66: #include <sys/stat.h> ! 67: #include <sys/wait.h> ! 68: #include <sys/socket.h> ! 69: #include <sys/file.h> ! 70: #include <sys/msgbuf.h> ! 71: #include <sys/uio.h> ! 72: #include <sys/un.h> ! 73: #include <sys/time.h> ! 74: #include <sys/resource.h> ! 75: #include <sys/signal.h> ! 76: ! 77: #include <netinet/in.h> ! 78: #include <netdb.h> ! 79: ! 80: #define CTTY "/dev/console" ! 81: char *LogName = "/dev/log"; ! 82: char *ConfFile = "/etc/syslog.conf"; ! 83: char *PidFile = "/etc/syslog.pid"; ! 84: char ctty[] = CTTY; ! 85: ! 86: #define FDMASK(fd) (1 << (fd)) ! 87: ! 88: #define dprintf if (Debug) printf ! 89: ! 90: #define UNAMESZ 8 /* length of a login name */ ! 91: #define MAXUNAMES 20 /* maximum number of user names */ ! 92: #define MAXFNAME 200 /* max file pathname length */ ! 93: ! 94: #define NOPRI 0x10 /* the "no priority" priority */ ! 95: #define LOG_MARK LOG_MAKEPRI(LOG_NFACILITIES, 0) /* mark "facility" */ ! 96: ! 97: /* ! 98: * Flags to logmsg(). ! 99: */ ! 100: ! 101: #define IGN_CONS 0x001 /* don't print on console */ ! 102: #define SYNC_FILE 0x002 /* do fsync on file after printing */ ! 103: #define ADDDATE 0x004 /* add a date to the message */ ! 104: #define MARK 0x008 /* this message is a mark */ ! 105: ! 106: /* ! 107: * This structure represents the files that will have log ! 108: * copies printed. ! 109: */ ! 110: ! 111: struct filed { ! 112: struct filed *f_next; /* next in linked list */ ! 113: short f_type; /* entry type, see below */ ! 114: short f_file; /* file descriptor */ ! 115: time_t f_time; /* time this was last written */ ! 116: u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */ ! 117: union { ! 118: char f_uname[MAXUNAMES][UNAMESZ+1]; ! 119: struct { ! 120: char f_hname[MAXHOSTNAMELEN+1]; ! 121: struct sockaddr_in f_addr; ! 122: } f_forw; /* forwarding address */ ! 123: char f_fname[MAXFNAME]; ! 124: } f_un; ! 125: char f_prevline[MAXSVLINE]; /* last message logged */ ! 126: char f_lasttime[16]; /* time of last occurrence */ ! 127: char f_prevhost[MAXHOSTNAMELEN+1]; /* host from which recd. */ ! 128: int f_prevpri; /* pri of f_prevline */ ! 129: int f_prevlen; /* length of f_prevline */ ! 130: int f_prevcount; /* repetition cnt of prevline */ ! 131: int f_repeatcount; /* number of "repeated" msgs */ ! 132: }; ! 133: ! 134: /* ! 135: * Intervals at which we flush out "message repeated" messages, ! 136: * in seconds after previous message is logged. After each flush, ! 137: * we move to the next interval until we reach the largest. ! 138: */ ! 139: int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ ! 140: #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) ! 141: #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) ! 142: #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \ ! 143: (f)->f_repeatcount = MAXREPEAT; \ ! 144: } ! 145: ! 146: /* values for f_type */ ! 147: #define F_UNUSED 0 /* unused entry */ ! 148: #define F_FILE 1 /* regular file */ ! 149: #define F_TTY 2 /* terminal */ ! 150: #define F_CONSOLE 3 /* console terminal */ ! 151: #define F_FORW 4 /* remote machine */ ! 152: #define F_USERS 5 /* list of users */ ! 153: #define F_WALL 6 /* everyone logged on */ ! 154: ! 155: char *TypeNames[7] = { ! 156: "UNUSED", "FILE", "TTY", "CONSOLE", ! 157: "FORW", "USERS", "WALL" ! 158: }; ! 159: ! 160: struct filed *Files; ! 161: struct filed consfile; ! 162: ! 163: int Debug; /* debug flag */ ! 164: char LocalHostName[MAXHOSTNAMELEN+1]; /* our hostname */ ! 165: char *LocalDomain; /* our local domain name */ ! 166: int InetInuse = 0; /* non-zero if INET sockets are being used */ ! 167: int finet; /* Internet datagram socket */ ! 168: int LogPort; /* port number for INET connections */ ! 169: int Initialized = 0; /* set when we have initialized ourselves */ ! 170: int MarkInterval = 20 * 60; /* interval between marks in seconds */ ! 171: int MarkSeq = 0; /* mark sequence number */ ! 172: ! 173: extern int errno, sys_nerr; ! 174: extern char *sys_errlist[]; ! 175: extern char *ctime(), *index(), *calloc(); ! 176: ! 177: main(argc, argv) ! 178: int argc; ! 179: char **argv; ! 180: { ! 181: register int i; ! 182: register char *p; ! 183: int funix, inetm, fklog, klogm, len; ! 184: struct sockaddr_un sunx, fromunix; ! 185: struct sockaddr_in sin, frominet; ! 186: FILE *fp; ! 187: char line[MSG_BSIZE + 1]; ! 188: extern int die(), domark(), reapchild(); ! 189: ! 190: while (--argc > 0) { ! 191: p = *++argv; ! 192: if (p[0] != '-') ! 193: usage(); ! 194: switch (p[1]) { ! 195: case 'f': /* configuration file */ ! 196: if (p[2] != '\0') ! 197: ConfFile = &p[2]; ! 198: break; ! 199: ! 200: case 'd': /* debug */ ! 201: Debug++; ! 202: break; ! 203: ! 204: case 'p': /* path */ ! 205: if (p[2] != '\0') ! 206: LogName = &p[2]; ! 207: break; ! 208: ! 209: case 'm': /* mark interval */ ! 210: if (p[2] != '\0') ! 211: MarkInterval = atoi(&p[2]) * 60; ! 212: break; ! 213: ! 214: default: ! 215: usage(); ! 216: } ! 217: } ! 218: ! 219: if (!Debug) { ! 220: if (fork()) ! 221: exit(0); ! 222: for (i = 0; i < 10; i++) ! 223: (void) close(i); ! 224: (void) open("/", 0); ! 225: (void) dup2(0, 1); ! 226: (void) dup2(0, 2); ! 227: untty(); ! 228: } else ! 229: setlinebuf(stdout); ! 230: ! 231: consfile.f_type = F_CONSOLE; ! 232: (void) strcpy(consfile.f_un.f_fname, ctty); ! 233: (void) gethostname(LocalHostName, sizeof LocalHostName); ! 234: if (p = index(LocalHostName, '.')) { ! 235: *p++ = '\0'; ! 236: LocalDomain = p; ! 237: } ! 238: else ! 239: LocalDomain = ""; ! 240: (void) signal(SIGTERM, die); ! 241: (void) signal(SIGINT, Debug ? die : SIG_IGN); ! 242: (void) signal(SIGQUIT, Debug ? die : SIG_IGN); ! 243: (void) signal(SIGCHLD, reapchild); ! 244: (void) signal(SIGALRM, domark); ! 245: (void) alarm(TIMERINTVL); ! 246: (void) unlink(LogName); ! 247: ! 248: sunx.sun_family = AF_UNIX; ! 249: (void) strncpy(sunx.sun_path, LogName, sizeof sunx.sun_path); ! 250: funix = socket(AF_UNIX, SOCK_DGRAM, 0); ! 251: if (funix < 0 || bind(funix, (struct sockaddr *) &sunx, ! 252: sizeof(sunx.sun_family)+strlen(sunx.sun_path)) < 0 || ! 253: chmod(LogName, 0666) < 0) { ! 254: (void) sprintf(line, "cannot create %s", LogName); ! 255: logerror(line); ! 256: dprintf("cannot create %s (%d)\n", LogName, errno); ! 257: die(0); ! 258: } ! 259: finet = socket(AF_INET, SOCK_DGRAM, 0); ! 260: if (finet >= 0) { ! 261: struct servent *sp; ! 262: ! 263: sp = getservbyname("syslog", "udp"); ! 264: if (sp == NULL) { ! 265: errno = 0; ! 266: logerror("syslog/udp: unknown service"); ! 267: die(0); ! 268: } ! 269: sin.sin_family = AF_INET; ! 270: sin.sin_port = LogPort = sp->s_port; ! 271: if (bind(finet, &sin, sizeof(sin)) < 0) { ! 272: logerror("bind"); ! 273: if (!Debug) ! 274: die(0); ! 275: } else { ! 276: inetm = FDMASK(finet); ! 277: InetInuse = 1; ! 278: } ! 279: } ! 280: if ((fklog = open("/dev/klog", O_RDONLY)) >= 0) ! 281: klogm = FDMASK(fklog); ! 282: else { ! 283: dprintf("can't open /dev/klog (%d)\n", errno); ! 284: klogm = 0; ! 285: } ! 286: ! 287: /* tuck my process id away */ ! 288: fp = fopen(PidFile, "w"); ! 289: if (fp != NULL) { ! 290: fprintf(fp, "%d\n", getpid()); ! 291: (void) fclose(fp); ! 292: } ! 293: ! 294: dprintf("off & running....\n"); ! 295: ! 296: init(); ! 297: (void) signal(SIGHUP, init); ! 298: ! 299: for (;;) { ! 300: int nfds, readfds = FDMASK(funix) | inetm | klogm; ! 301: ! 302: errno = 0; ! 303: dprintf("readfds = %#x\n", readfds); ! 304: nfds = select(20, (fd_set *) &readfds, (fd_set *) NULL, ! 305: (fd_set *) NULL, (struct timeval *) NULL); ! 306: if (nfds == 0) ! 307: continue; ! 308: if (nfds < 0) { ! 309: if (errno != EINTR) ! 310: logerror("select"); ! 311: continue; ! 312: } ! 313: dprintf("got a message (%d, %#x)\n", nfds, readfds); ! 314: if (readfds & klogm) { ! 315: i = read(fklog, line, sizeof(line) - 1); ! 316: if (i > 0) { ! 317: line[i] = '\0'; ! 318: printsys(line); ! 319: } else if (i < 0 && errno != EINTR) { ! 320: logerror("klog"); ! 321: fklog = -1; ! 322: klogm = 0; ! 323: } ! 324: } ! 325: if (readfds & FDMASK(funix)) { ! 326: len = sizeof fromunix; ! 327: i = recvfrom(funix, line, MAXLINE, 0, ! 328: (struct sockaddr *) &fromunix, &len); ! 329: if (i > 0) { ! 330: line[i] = '\0'; ! 331: printline(LocalHostName, line); ! 332: } else if (i < 0 && errno != EINTR) ! 333: logerror("recvfrom unix"); ! 334: } ! 335: if (readfds & inetm) { ! 336: len = sizeof frominet; ! 337: i = recvfrom(finet, line, MAXLINE, 0, &frominet, &len); ! 338: if (i > 0) { ! 339: extern char *cvthname(); ! 340: ! 341: line[i] = '\0'; ! 342: printline(cvthname(&frominet), line); ! 343: } else if (i < 0 && errno != EINTR) ! 344: logerror("recvfrom inet"); ! 345: } ! 346: } ! 347: } ! 348: ! 349: usage() ! 350: { ! 351: fprintf(stderr, "usage: syslogd [-d] [-mmarkinterval] [-ppath] [-fconffile]\n"); ! 352: exit(1); ! 353: } ! 354: ! 355: untty() ! 356: { ! 357: int i; ! 358: ! 359: if (!Debug) { ! 360: i = open("/dev/tty", O_RDWR); ! 361: if (i >= 0) { ! 362: (void) ioctl(i, (int) TIOCNOTTY, (char *)0); ! 363: (void) close(i); ! 364: } ! 365: } ! 366: } ! 367: ! 368: /* ! 369: * Take a raw input line, decode the message, and print the message ! 370: * on the appropriate log files. ! 371: */ ! 372: ! 373: printline(hname, msg) ! 374: char *hname; ! 375: char *msg; ! 376: { ! 377: register char *p, *q; ! 378: register int c; ! 379: char line[MAXLINE + 1]; ! 380: int pri; ! 381: ! 382: /* test for special codes */ ! 383: pri = DEFUPRI; ! 384: p = msg; ! 385: if (*p == '<') { ! 386: pri = 0; ! 387: while (isdigit(*++p)) ! 388: pri = 10 * pri + (*p - '0'); ! 389: if (*p == '>') ! 390: ++p; ! 391: } ! 392: if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) ! 393: pri = DEFUPRI; ! 394: ! 395: /* don't allow users to log kernel messages */ ! 396: if (LOG_FAC(pri) == LOG_KERN) ! 397: pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); ! 398: ! 399: q = line; ! 400: ! 401: while ((c = *p++ & 0177) != '\0' && c != '\n' && ! 402: q < &line[sizeof(line) - 1]) { ! 403: if (iscntrl(c)) { ! 404: *q++ = '^'; ! 405: *q++ = c ^ 0100; ! 406: } else ! 407: *q++ = c; ! 408: } ! 409: *q = '\0'; ! 410: ! 411: logmsg(pri, line, hname, 0); ! 412: } ! 413: ! 414: /* ! 415: * Take a raw input line from /dev/klog, split and format similar to syslog(). ! 416: */ ! 417: ! 418: printsys(msg) ! 419: char *msg; ! 420: { ! 421: register char *p, *q; ! 422: register int c; ! 423: char line[MAXLINE + 1]; ! 424: int pri, flags; ! 425: char *lp; ! 426: ! 427: (void) sprintf(line, "vmunix: "); ! 428: lp = line + strlen(line); ! 429: for (p = msg; *p != '\0'; ) { ! 430: flags = SYNC_FILE | ADDDATE; /* fsync file after write */ ! 431: pri = DEFSPRI; ! 432: if (*p == '<') { ! 433: pri = 0; ! 434: while (isdigit(*++p)) ! 435: pri = 10 * pri + (*p - '0'); ! 436: if (*p == '>') ! 437: ++p; ! 438: } else { ! 439: /* kernel printf's come out on console */ ! 440: flags |= IGN_CONS; ! 441: } ! 442: if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) ! 443: pri = DEFSPRI; ! 444: q = lp; ! 445: while (*p != '\0' && (c = *p++) != '\n' && ! 446: q < &line[MAXLINE]) ! 447: *q++ = c; ! 448: *q = '\0'; ! 449: logmsg(pri, line, LocalHostName, flags); ! 450: } ! 451: } ! 452: ! 453: time_t now; ! 454: ! 455: /* ! 456: * Log a message to the appropriate log files, users, etc. based on ! 457: * the priority. ! 458: */ ! 459: ! 460: logmsg(pri, msg, from, flags) ! 461: int pri; ! 462: char *msg, *from; ! 463: int flags; ! 464: { ! 465: register struct filed *f; ! 466: int fac, prilev; ! 467: int omask, msglen; ! 468: char *timestamp; ! 469: ! 470: dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n", pri, flags, from, msg); ! 471: ! 472: omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM)); ! 473: ! 474: /* ! 475: * Check to see if msg looks non-standard. ! 476: */ ! 477: msglen = strlen(msg); ! 478: if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' || ! 479: msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') ! 480: flags |= ADDDATE; ! 481: ! 482: (void) time(&now); ! 483: if (flags & ADDDATE) ! 484: timestamp = ctime(&now) + 4; ! 485: else { ! 486: timestamp = msg; ! 487: msg += 16; ! 488: msglen -= 16; ! 489: } ! 490: ! 491: /* extract facility and priority level */ ! 492: if (flags & MARK) ! 493: fac = LOG_NFACILITIES; ! 494: else ! 495: fac = LOG_FAC(pri); ! 496: prilev = LOG_PRI(pri); ! 497: ! 498: /* log the message to the particular outputs */ ! 499: if (!Initialized) { ! 500: f = &consfile; ! 501: f->f_file = open(ctty, O_WRONLY); ! 502: ! 503: if (f->f_file >= 0) { ! 504: untty(); ! 505: fprintlog(f, flags, (char *)NULL); ! 506: (void) close(f->f_file); ! 507: } ! 508: (void) sigsetmask(omask); ! 509: return; ! 510: } ! 511: for (f = Files; f; f = f->f_next) { ! 512: /* skip messages that are incorrect priority */ ! 513: if (f->f_pmask[fac] < prilev || f->f_pmask[fac] == NOPRI) ! 514: continue; ! 515: ! 516: if (f->f_type == F_CONSOLE && (flags & IGN_CONS)) ! 517: continue; ! 518: ! 519: /* don't output marks to recently written files */ ! 520: if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2) ! 521: continue; ! 522: ! 523: /* ! 524: * suppress duplicate lines to this file ! 525: */ ! 526: if ((flags & MARK) == 0 && msglen == f->f_prevlen && ! 527: !strcmp(msg, f->f_prevline) && ! 528: !strcmp(from, f->f_prevhost)) { ! 529: (void) strncpy(f->f_lasttime, timestamp, 15); ! 530: f->f_prevcount++; ! 531: dprintf("msg repeated %d times, %d sec of %d\n", ! 532: f->f_prevcount, now - f->f_time, ! 533: repeatinterval[f->f_repeatcount]); ! 534: /* ! 535: * If domark would have logged this by now, ! 536: * flush it now (so we don't hold isolated messages), ! 537: * but back off so we'll flush less often ! 538: * in the future. ! 539: */ ! 540: if (now > REPEATTIME(f)) { ! 541: fprintlog(f, flags, (char *)NULL); ! 542: BACKOFF(f); ! 543: } ! 544: } else { ! 545: /* new line, save it */ ! 546: if (f->f_prevcount) ! 547: fprintlog(f, 0, (char *)NULL); ! 548: f->f_repeatcount = 0; ! 549: (void) strncpy(f->f_lasttime, timestamp, 15); ! 550: (void) strncpy(f->f_prevhost, from, ! 551: sizeof(f->f_prevhost)); ! 552: if (msglen < MAXSVLINE) { ! 553: f->f_prevlen = msglen; ! 554: f->f_prevpri = pri; ! 555: (void) strcpy(f->f_prevline, msg); ! 556: fprintlog(f, flags, (char *)NULL); ! 557: } else { ! 558: f->f_prevline[0] = 0; ! 559: f->f_prevlen = 0; ! 560: fprintlog(f, flags, msg); ! 561: } ! 562: } ! 563: } ! 564: (void) sigsetmask(omask); ! 565: } ! 566: ! 567: fprintlog(f, flags, msg) ! 568: register struct filed *f; ! 569: int flags; ! 570: char *msg; ! 571: { ! 572: struct iovec iov[6]; ! 573: register struct iovec *v = iov; ! 574: register int l; ! 575: char line[MAXLINE + 1]; ! 576: char repbuf[80]; ! 577: ! 578: v->iov_base = f->f_lasttime; ! 579: v->iov_len = 15; ! 580: v++; ! 581: v->iov_base = " "; ! 582: v->iov_len = 1; ! 583: v++; ! 584: v->iov_base = f->f_prevhost; ! 585: v->iov_len = strlen(v->iov_base); ! 586: v++; ! 587: v->iov_base = " "; ! 588: v->iov_len = 1; ! 589: v++; ! 590: if (msg) { ! 591: v->iov_base = msg; ! 592: v->iov_len = strlen(msg); ! 593: } else if (f->f_prevcount > 1) { ! 594: (void) sprintf(repbuf, "last message repeated %d times", ! 595: f->f_prevcount); ! 596: v->iov_base = repbuf; ! 597: v->iov_len = strlen(repbuf); ! 598: } else { ! 599: v->iov_base = f->f_prevline; ! 600: v->iov_len = f->f_prevlen; ! 601: } ! 602: v++; ! 603: ! 604: dprintf("Logging to %s", TypeNames[f->f_type]); ! 605: f->f_time = now; ! 606: ! 607: switch (f->f_type) { ! 608: case F_UNUSED: ! 609: dprintf("\n"); ! 610: break; ! 611: ! 612: case F_FORW: ! 613: dprintf(" %s\n", f->f_un.f_forw.f_hname); ! 614: (void) sprintf(line, "<%d>%.15s %s", f->f_prevpri, ! 615: iov[0].iov_base, iov[4].iov_base); ! 616: l = strlen(line); ! 617: if (l > MAXLINE) ! 618: l = MAXLINE; ! 619: if (sendto(finet, line, l, 0, &f->f_un.f_forw.f_addr, ! 620: sizeof f->f_un.f_forw.f_addr) != l) { ! 621: int e = errno; ! 622: (void) close(f->f_file); ! 623: f->f_type = F_UNUSED; ! 624: errno = e; ! 625: logerror("sendto"); ! 626: } ! 627: break; ! 628: ! 629: case F_CONSOLE: ! 630: if (flags & IGN_CONS) { ! 631: dprintf(" (ignored)\n"); ! 632: break; ! 633: } ! 634: /* FALLTHROUGH */ ! 635: ! 636: case F_TTY: ! 637: case F_FILE: ! 638: dprintf(" %s\n", f->f_un.f_fname); ! 639: if (f->f_type != F_FILE) { ! 640: v->iov_base = "\r\n"; ! 641: v->iov_len = 2; ! 642: } else { ! 643: v->iov_base = "\n"; ! 644: v->iov_len = 1; ! 645: } ! 646: again: ! 647: if (writev(f->f_file, iov, 6) < 0) { ! 648: int e = errno; ! 649: (void) close(f->f_file); ! 650: /* ! 651: * Check for EBADF on TTY's due to vhangup() XXX ! 652: */ ! 653: if (e == EBADF && f->f_type != F_FILE) { ! 654: f->f_file = open(f->f_un.f_fname, O_WRONLY|O_APPEND); ! 655: if (f->f_file < 0) { ! 656: f->f_type = F_UNUSED; ! 657: logerror(f->f_un.f_fname); ! 658: } else { ! 659: untty(); ! 660: goto again; ! 661: } ! 662: } else { ! 663: f->f_type = F_UNUSED; ! 664: errno = e; ! 665: logerror(f->f_un.f_fname); ! 666: } ! 667: } else if (flags & SYNC_FILE) ! 668: (void) fsync(f->f_file); ! 669: break; ! 670: ! 671: case F_USERS: ! 672: case F_WALL: ! 673: dprintf("\n"); ! 674: v->iov_base = "\r\n"; ! 675: v->iov_len = 2; ! 676: wallmsg(f, iov); ! 677: break; ! 678: } ! 679: f->f_prevcount = 0; ! 680: } ! 681: ! 682: jmp_buf ttybuf; ! 683: ! 684: endtty() ! 685: { ! 686: longjmp(ttybuf, 1); ! 687: } ! 688: ! 689: /* ! 690: * WALLMSG -- Write a message to the world at large ! 691: * ! 692: * Write the specified message to either the entire ! 693: * world, or a list of approved users. ! 694: */ ! 695: ! 696: wallmsg(f, iov) ! 697: register struct filed *f; ! 698: struct iovec *iov; ! 699: { ! 700: register char *p; ! 701: register int i; ! 702: int ttyf, len; ! 703: FILE *uf; ! 704: static int reenter = 0; ! 705: struct utmp ut; ! 706: char greetings[200]; ! 707: ! 708: if (reenter++) ! 709: return; ! 710: ! 711: /* open the user login file */ ! 712: if ((uf = fopen("/etc/utmp", "r")) == NULL) { ! 713: logerror("/etc/utmp"); ! 714: reenter = 0; ! 715: return; ! 716: } ! 717: ! 718: /* ! 719: * Might as well fork instead of using nonblocking I/O ! 720: * and doing notty(). ! 721: */ ! 722: if (fork() == 0) { ! 723: (void) signal(SIGTERM, SIG_DFL); ! 724: (void) alarm(0); ! 725: (void) signal(SIGALRM, endtty); ! 726: (void) signal(SIGTTOU, SIG_IGN); ! 727: (void) sigsetmask(0); ! 728: (void) sprintf(greetings, ! 729: "\r\n\7Message from syslogd@%s at %.24s ...\r\n", ! 730: iov[2].iov_base, ctime(&now)); ! 731: len = strlen(greetings); ! 732: ! 733: /* scan the user login file */ ! 734: while (fread((char *) &ut, sizeof ut, 1, uf) == 1) { ! 735: /* is this slot used? */ ! 736: if (ut.ut_name[0] == '\0') ! 737: continue; ! 738: ! 739: /* should we send the message to this user? */ ! 740: if (f->f_type == F_USERS) { ! 741: for (i = 0; i < MAXUNAMES; i++) { ! 742: if (!f->f_un.f_uname[i][0]) { ! 743: i = MAXUNAMES; ! 744: break; ! 745: } ! 746: if (strncmp(f->f_un.f_uname[i], ! 747: ut.ut_name, UNAMESZ) == 0) ! 748: break; ! 749: } ! 750: if (i >= MAXUNAMES) ! 751: continue; ! 752: } ! 753: ! 754: /* compute the device name */ ! 755: p = "/dev/12345678"; ! 756: strncpy(&p[5], ut.ut_line, UNAMESZ); ! 757: ! 758: if (f->f_type == F_WALL) { ! 759: iov[0].iov_base = greetings; ! 760: iov[0].iov_len = len; ! 761: iov[1].iov_len = 0; ! 762: } ! 763: if (setjmp(ttybuf) == 0) { ! 764: (void) alarm(15); ! 765: /* open the terminal */ ! 766: ttyf = open(p, O_WRONLY); ! 767: if (ttyf >= 0) { ! 768: struct stat statb; ! 769: ! 770: if (fstat(ttyf, &statb) == 0 && ! 771: (statb.st_mode & S_IWRITE)) ! 772: (void) writev(ttyf, iov, 6); ! 773: close(ttyf); ! 774: ttyf = -1; ! 775: } ! 776: } ! 777: (void) alarm(0); ! 778: } ! 779: exit(0); ! 780: } ! 781: /* close the user login file */ ! 782: (void) fclose(uf); ! 783: reenter = 0; ! 784: } ! 785: ! 786: reapchild() ! 787: { ! 788: union wait status; ! 789: ! 790: while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0) ! 791: ; ! 792: } ! 793: ! 794: /* ! 795: * Return a printable representation of a host address. ! 796: */ ! 797: char * ! 798: cvthname(f) ! 799: struct sockaddr_in *f; ! 800: { ! 801: struct hostent *hp; ! 802: register char *p; ! 803: extern char *inet_ntoa(); ! 804: ! 805: dprintf("cvthname(%s)\n", inet_ntoa(f->sin_addr)); ! 806: ! 807: if (f->sin_family != AF_INET) { ! 808: dprintf("Malformed from address\n"); ! 809: return ("???"); ! 810: } ! 811: hp = gethostbyaddr(&f->sin_addr, sizeof(struct in_addr), f->sin_family); ! 812: if (hp == 0) { ! 813: dprintf("Host name for your address (%s) unknown\n", ! 814: inet_ntoa(f->sin_addr)); ! 815: return (inet_ntoa(f->sin_addr)); ! 816: } ! 817: if ((p = index(hp->h_name, '.')) && strcmp(p + 1, LocalDomain) == 0) ! 818: *p = '\0'; ! 819: return (hp->h_name); ! 820: } ! 821: ! 822: domark() ! 823: { ! 824: register struct filed *f; ! 825: ! 826: now = time(0); ! 827: MarkSeq += TIMERINTVL; ! 828: if (MarkSeq >= MarkInterval) { ! 829: logmsg(LOG_INFO, "-- MARK --", LocalHostName, ADDDATE|MARK); ! 830: MarkSeq = 0; ! 831: } ! 832: ! 833: for (f = Files; f; f = f->f_next) { ! 834: if (f->f_prevcount && now >= REPEATTIME(f)) { ! 835: dprintf("flush %s: repeated %d times, %d sec.\n", ! 836: TypeNames[f->f_type], f->f_prevcount, ! 837: repeatinterval[f->f_repeatcount]); ! 838: fprintlog(f, 0, (char *)NULL); ! 839: BACKOFF(f); ! 840: } ! 841: } ! 842: (void) alarm(TIMERINTVL); ! 843: } ! 844: ! 845: /* ! 846: * Print syslogd errors some place. ! 847: */ ! 848: logerror(type) ! 849: char *type; ! 850: { ! 851: char buf[100]; ! 852: ! 853: if (errno == 0) ! 854: (void) sprintf(buf, "syslogd: %s", type); ! 855: else if ((unsigned) errno > sys_nerr) ! 856: (void) sprintf(buf, "syslogd: %s: error %d", type, errno); ! 857: else ! 858: (void) sprintf(buf, "syslogd: %s: %s", type, sys_errlist[errno]); ! 859: errno = 0; ! 860: dprintf("%s\n", buf); ! 861: logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE); ! 862: } ! 863: ! 864: die(sig) ! 865: { ! 866: register struct filed *f; ! 867: char buf[100]; ! 868: ! 869: for (f = Files; f != NULL; f = f->f_next) { ! 870: /* flush any pending output */ ! 871: if (f->f_prevcount) ! 872: fprintlog(f, 0, (char *)NULL); ! 873: } ! 874: if (sig) { ! 875: dprintf("syslogd: exiting on signal %d\n", sig); ! 876: (void) sprintf(buf, "exiting on signal %d", sig); ! 877: errno = 0; ! 878: logerror(buf); ! 879: } ! 880: (void) unlink(LogName); ! 881: exit(0); ! 882: } ! 883: ! 884: /* ! 885: * INIT -- Initialize syslogd from configuration table ! 886: */ ! 887: ! 888: init() ! 889: { ! 890: register int i; ! 891: register FILE *cf; ! 892: register struct filed *f, *next, **nextp; ! 893: register char *p; ! 894: char cline[BUFSIZ]; ! 895: ! 896: dprintf("init\n"); ! 897: ! 898: /* ! 899: * Close all open log files. ! 900: */ ! 901: Initialized = 0; ! 902: for (f = Files; f != NULL; f = next) { ! 903: /* flush any pending output */ ! 904: if (f->f_prevcount) ! 905: fprintlog(f, 0, (char *)NULL); ! 906: ! 907: switch (f->f_type) { ! 908: case F_FILE: ! 909: case F_TTY: ! 910: case F_CONSOLE: ! 911: (void) close(f->f_file); ! 912: break; ! 913: } ! 914: next = f->f_next; ! 915: free((char *) f); ! 916: } ! 917: Files = NULL; ! 918: nextp = &Files; ! 919: ! 920: /* open the configuration file */ ! 921: if ((cf = fopen(ConfFile, "r")) == NULL) { ! 922: dprintf("cannot open %s\n", ConfFile); ! 923: *nextp = (struct filed *)calloc(1, sizeof(*f)); ! 924: cfline("*.ERR\t/dev/console", *nextp); ! 925: (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f)); ! 926: cfline("*.PANIC\t*", (*nextp)->f_next); ! 927: Initialized = 1; ! 928: return; ! 929: } ! 930: ! 931: /* ! 932: * Foreach line in the conf table, open that file. ! 933: */ ! 934: f = NULL; ! 935: while (fgets(cline, sizeof cline, cf) != NULL) { ! 936: /* ! 937: * check for end-of-section, comments, strip off trailing ! 938: * spaces and newline character. ! 939: */ ! 940: for (p = cline; isspace(*p); ++p); ! 941: if (*p == NULL || *p == '#') ! 942: continue; ! 943: for (p = index(cline, '\0'); isspace(*--p);); ! 944: *++p = '\0'; ! 945: f = (struct filed *)calloc(1, sizeof(*f)); ! 946: *nextp = f; ! 947: nextp = &f->f_next; ! 948: cfline(cline, f); ! 949: } ! 950: ! 951: /* close the configuration file */ ! 952: (void) fclose(cf); ! 953: ! 954: Initialized = 1; ! 955: ! 956: if (Debug) { ! 957: for (f = Files; f; f = f->f_next) { ! 958: for (i = 0; i <= LOG_NFACILITIES; i++) ! 959: if (f->f_pmask[i] == NOPRI) ! 960: printf("X "); ! 961: else ! 962: printf("%d ", f->f_pmask[i]); ! 963: printf("%s: ", TypeNames[f->f_type]); ! 964: switch (f->f_type) { ! 965: case F_FILE: ! 966: case F_TTY: ! 967: case F_CONSOLE: ! 968: printf("%s", f->f_un.f_fname); ! 969: break; ! 970: ! 971: case F_FORW: ! 972: printf("%s", f->f_un.f_forw.f_hname); ! 973: break; ! 974: ! 975: case F_USERS: ! 976: for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++) ! 977: printf("%s, ", f->f_un.f_uname[i]); ! 978: break; ! 979: } ! 980: printf("\n"); ! 981: } ! 982: } ! 983: ! 984: logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE); ! 985: dprintf("syslogd: restarted\n"); ! 986: } ! 987: ! 988: /* ! 989: * Crack a configuration file line ! 990: */ ! 991: ! 992: struct code { ! 993: char *c_name; ! 994: int c_val; ! 995: }; ! 996: ! 997: struct code PriNames[] = { ! 998: "panic", LOG_EMERG, ! 999: "emerg", LOG_EMERG, ! 1000: "alert", LOG_ALERT, ! 1001: "crit", LOG_CRIT, ! 1002: "err", LOG_ERR, ! 1003: "error", LOG_ERR, ! 1004: "warn", LOG_WARNING, ! 1005: "warning", LOG_WARNING, ! 1006: "notice", LOG_NOTICE, ! 1007: "info", LOG_INFO, ! 1008: "debug", LOG_DEBUG, ! 1009: "none", NOPRI, ! 1010: NULL, -1 ! 1011: }; ! 1012: ! 1013: struct code FacNames[] = { ! 1014: "kern", LOG_KERN, ! 1015: "user", LOG_USER, ! 1016: "mail", LOG_MAIL, ! 1017: "daemon", LOG_DAEMON, ! 1018: "auth", LOG_AUTH, ! 1019: "security", LOG_AUTH, ! 1020: "mark", LOG_MARK, ! 1021: "syslog", LOG_SYSLOG, ! 1022: "lpr", LOG_LPR, ! 1023: "news", LOG_NEWS, ! 1024: "uucp", LOG_UUCP, ! 1025: "local0", LOG_LOCAL0, ! 1026: "local1", LOG_LOCAL1, ! 1027: "local2", LOG_LOCAL2, ! 1028: "local3", LOG_LOCAL3, ! 1029: "local4", LOG_LOCAL4, ! 1030: "local5", LOG_LOCAL5, ! 1031: "local6", LOG_LOCAL6, ! 1032: "local7", LOG_LOCAL7, ! 1033: NULL, -1 ! 1034: }; ! 1035: ! 1036: cfline(line, f) ! 1037: char *line; ! 1038: register struct filed *f; ! 1039: { ! 1040: register char *p; ! 1041: register char *q; ! 1042: register int i; ! 1043: char *bp; ! 1044: int pri; ! 1045: struct hostent *hp; ! 1046: char buf[MAXLINE]; ! 1047: ! 1048: dprintf("cfline(%s)\n", line); ! 1049: ! 1050: errno = 0; /* keep sys_errlist stuff out of logerror messages */ ! 1051: ! 1052: /* clear out file entry */ ! 1053: bzero((char *) f, sizeof *f); ! 1054: for (i = 0; i <= LOG_NFACILITIES; i++) ! 1055: f->f_pmask[i] = NOPRI; ! 1056: ! 1057: /* scan through the list of selectors */ ! 1058: for (p = line; *p && *p != '\t';) { ! 1059: ! 1060: /* find the end of this facility name list */ ! 1061: for (q = p; *q && *q != '\t' && *q++ != '.'; ) ! 1062: continue; ! 1063: ! 1064: /* collect priority name */ ! 1065: for (bp = buf; *q && !index("\t,;", *q); ) ! 1066: *bp++ = *q++; ! 1067: *bp = '\0'; ! 1068: ! 1069: /* skip cruft */ ! 1070: while (index(", ;", *q)) ! 1071: q++; ! 1072: ! 1073: /* decode priority name */ ! 1074: pri = decode(buf, PriNames); ! 1075: if (pri < 0) { ! 1076: char xbuf[200]; ! 1077: ! 1078: (void) sprintf(xbuf, "unknown priority name \"%s\"", buf); ! 1079: logerror(xbuf); ! 1080: return; ! 1081: } ! 1082: ! 1083: /* scan facilities */ ! 1084: while (*p && !index("\t.;", *p)) { ! 1085: int i; ! 1086: ! 1087: for (bp = buf; *p && !index("\t,;.", *p); ) ! 1088: *bp++ = *p++; ! 1089: *bp = '\0'; ! 1090: if (*buf == '*') ! 1091: for (i = 0; i < LOG_NFACILITIES; i++) ! 1092: f->f_pmask[i] = pri; ! 1093: else { ! 1094: i = decode(buf, FacNames); ! 1095: if (i < 0) { ! 1096: char xbuf[200]; ! 1097: ! 1098: (void) sprintf(xbuf, "unknown facility name \"%s\"", buf); ! 1099: logerror(xbuf); ! 1100: return; ! 1101: } ! 1102: f->f_pmask[i >> 3] = pri; ! 1103: } ! 1104: while (*p == ',' || *p == ' ') ! 1105: p++; ! 1106: } ! 1107: ! 1108: p = q; ! 1109: } ! 1110: ! 1111: /* skip to action part */ ! 1112: while (*p == '\t') ! 1113: p++; ! 1114: ! 1115: switch (*p) ! 1116: { ! 1117: case '@': ! 1118: if (!InetInuse) ! 1119: break; ! 1120: (void) strcpy(f->f_un.f_forw.f_hname, ++p); ! 1121: hp = gethostbyname(p); ! 1122: if (hp == NULL) { ! 1123: char buf[100]; ! 1124: ! 1125: (void) sprintf(buf, "unknown host %s", p); ! 1126: errno = 0; ! 1127: logerror(buf); ! 1128: break; ! 1129: } ! 1130: bzero((char *) &f->f_un.f_forw.f_addr, ! 1131: sizeof f->f_un.f_forw.f_addr); ! 1132: f->f_un.f_forw.f_addr.sin_family = AF_INET; ! 1133: f->f_un.f_forw.f_addr.sin_port = LogPort; ! 1134: bcopy(hp->h_addr, (char *) &f->f_un.f_forw.f_addr.sin_addr, hp->h_length); ! 1135: f->f_type = F_FORW; ! 1136: break; ! 1137: ! 1138: case '/': ! 1139: (void) strcpy(f->f_un.f_fname, p); ! 1140: if ((f->f_file = open(p, O_WRONLY|O_APPEND)) < 0) { ! 1141: f->f_file = F_UNUSED; ! 1142: logerror(p); ! 1143: break; ! 1144: } ! 1145: if (isatty(f->f_file)) { ! 1146: f->f_type = F_TTY; ! 1147: untty(); ! 1148: } ! 1149: else ! 1150: f->f_type = F_FILE; ! 1151: if (strcmp(p, ctty) == 0) ! 1152: f->f_type = F_CONSOLE; ! 1153: break; ! 1154: ! 1155: case '*': ! 1156: f->f_type = F_WALL; ! 1157: break; ! 1158: ! 1159: default: ! 1160: for (i = 0; i < MAXUNAMES && *p; i++) { ! 1161: for (q = p; *q && *q != ','; ) ! 1162: q++; ! 1163: (void) strncpy(f->f_un.f_uname[i], p, UNAMESZ); ! 1164: if ((q - p) > UNAMESZ) ! 1165: f->f_un.f_uname[i][UNAMESZ] = '\0'; ! 1166: else ! 1167: f->f_un.f_uname[i][q - p] = '\0'; ! 1168: while (*q == ',' || *q == ' ') ! 1169: q++; ! 1170: p = q; ! 1171: } ! 1172: f->f_type = F_USERS; ! 1173: break; ! 1174: } ! 1175: } ! 1176: ! 1177: ! 1178: /* ! 1179: * Decode a symbolic name to a numeric value ! 1180: */ ! 1181: ! 1182: decode(name, codetab) ! 1183: char *name; ! 1184: struct code *codetab; ! 1185: { ! 1186: register struct code *c; ! 1187: register char *p; ! 1188: char buf[40]; ! 1189: ! 1190: if (isdigit(*name)) ! 1191: return (atoi(name)); ! 1192: ! 1193: (void) strcpy(buf, name); ! 1194: for (p = buf; *p; p++) ! 1195: if (isupper(*p)) ! 1196: *p = tolower(*p); ! 1197: for (c = codetab; c->c_name; c++) ! 1198: if (!strcmp(buf, c->c_name)) ! 1199: return (c->c_val); ! 1200: ! 1201: return (-1); ! 1202: }
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