| 1 | /* $Revision: 1.9 $ |
| 2 | ** This file has been modified to get it to compile more easily |
| 3 | ** on pre-4.4BSD (e.g., SysVr4 :-) systems. Rich $alz, June 1991. |
| 4 | */ |
| 5 | |
| 6 | /* change these three if you must keep running an old syslog. */ |
| 7 | #define _PATH_LOGFILE "/dev/log" |
| 8 | #define _PATH_LOGCONF "/etc/syslog.conf" |
| 9 | #define _PATH_LOGPID "/etc/syslog.pid" |
| 10 | |
| 11 | /* #define this to enable verbose debugging of all messages. */ |
| 12 | #undef VERBOSE_DEBUG |
| 13 | /* #define this to line to listen on the INET port. */ |
| 14 | #undef DO_INET_SOCKET |
| 15 | /* #undef this to not read kernel syslog messages. */ |
| 16 | #define _PATH_KLOG "/dev/klog" |
| 17 | #undef _PATH_KLOG |
| 18 | /* set this depending on what your sighandler is. */ |
| 19 | /* =()<#define SIGHANDLER @<SIGHANDLER>@>()= */ |
| 20 | #define SIGHANDLER void |
| 21 | /* if you need various BSD functions, set this. */ |
| 22 | #define NEED_BZERO_ETC |
| 23 | |
| 24 | /* Use "union wait" instead of int? */ |
| 25 | /* =()<#define @<USE_UNION_WAIT>@_USE_UNION_WAIT>()= */ |
| 26 | #define DONT_USE_UNION_WAIT |
| 27 | #if defined(DO_USE_UNION_WAIT) |
| 28 | #define WAITVALUE union wait |
| 29 | #else |
| 30 | #define WAITVALUE int |
| 31 | #endif /* defined(DO_USE_UNION_WAIT) */ |
| 32 | |
| 33 | /* |
| 34 | * Copyright (c) 1983, 1988 Regents of the University of California. |
| 35 | * All rights reserved. |
| 36 | * |
| 37 | * Redistribution and use in source and binary forms are permitted provided |
| 38 | * that: (1) source distributions retain this entire copyright notice and |
| 39 | * comment, and (2) distributions including binaries display the following |
| 40 | * acknowledgement: ``This product includes software developed by the |
| 41 | * University of California, Berkeley and its contributors'' in the |
| 42 | * documentation or other materials provided with the distribution and in |
| 43 | * all advertising materials mentioning features or use of this software. |
| 44 | * Neither the name of the University nor the names of its contributors may |
| 45 | * be used to endorse or promote products derived from this software without |
| 46 | * specific prior written permission. |
| 47 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| 48 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| 49 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 50 | */ |
| 51 | |
| 52 | #ifndef lint |
| 53 | char copyright[] = |
| 54 | "@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\ |
| 55 | All rights reserved.\n"; |
| 56 | #endif /* not lint */ |
| 57 | |
| 58 | #ifndef lint |
| 59 | static char sccsid[] = "@(#)syslogd.c 5.42 (Berkeley) 6/29/90"; |
| 60 | #endif /* not lint */ |
| 61 | |
| 62 | /* |
| 63 | * syslogd -- log system messages |
| 64 | * |
| 65 | * This program implements a system log. It takes a series of lines. |
| 66 | * Each line may have a priority, signified as "<n>" as |
| 67 | * the first characters of the line. If this is |
| 68 | * not present, a default priority is used. |
| 69 | * |
| 70 | * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will |
| 71 | * cause it to reread its configuration file. |
| 72 | * |
| 73 | * Defined Constants: |
| 74 | * |
| 75 | * MAXLINE -- the maximimum line length that can be handled. |
| 76 | * DEFUPRI -- the default priority for user messages |
| 77 | * DEFSPRI -- the default priority for kernel messages |
| 78 | * |
| 79 | * Author: Eric Allman |
| 80 | * extensive changes by Ralph Campbell |
| 81 | * more extensive changes by Eric Allman (again) |
| 82 | */ |
| 83 | |
| 84 | #define MAXLINE 1024 /* maximum line length */ |
| 85 | #define MAXSVLINE 120 /* maximum saved line length */ |
| 86 | #define DEFUPRI (LOG_USER|LOG_NOTICE) |
| 87 | #define DEFSPRI (LOG_KERN|LOG_CRIT) |
| 88 | #define TIMERINTVL 30 /* interval for checking flush, mark */ |
| 89 | |
| 90 | #include <sys/param.h> |
| 91 | #include <sys/errno.h> |
| 92 | #include <sys/ioctl.h> |
| 93 | #include <sys/stat.h> |
| 94 | #include <sys/wait.h> |
| 95 | #include <sys/socket.h> |
| 96 | #include <sys/file.h> |
| 97 | #include <sys/uio.h> |
| 98 | #include <sys/un.h> |
| 99 | #include <sys/time.h> |
| 100 | #include <sys/resource.h> |
| 101 | #include <sys/signal.h> |
| 102 | |
| 103 | #ifdef MSG_BSIZE |
| 104 | #undef MSG_BSIZE |
| 105 | #endif |
| 106 | #define MSG_BSIZE 4096 |
| 107 | |
| 108 | #include <netinet/in.h> |
| 109 | #include <netdb.h> |
| 110 | |
| 111 | #include <utmp.h> |
| 112 | #include <stdio.h> |
| 113 | #include <ctype.h> |
| 114 | #include <string.h> |
| 115 | |
| 116 | #define SYSLOG_NAMES |
| 117 | #include "syslog.h" |
| 118 | |
| 119 | #define UT_NAMESIZE 8 |
| 120 | #define _PATH_UTMP "/etc/utmp" |
| 121 | #define _PATH_DEV "/dev/" |
| 122 | #define _PATH_CONSOLE "/dev/console" |
| 123 | |
| 124 | #ifndef sigmask |
| 125 | #define sigmask(m) (1 << ((m)-1)) |
| 126 | #endif |
| 127 | char *LogName = _PATH_LOGFILE; |
| 128 | char *ConfFile = _PATH_LOGCONF; |
| 129 | char *PidFile = _PATH_LOGPID; |
| 130 | char ctty[] = _PATH_CONSOLE; |
| 131 | |
| 132 | #define FDMASK(fd) (1 << (fd)) |
| 133 | |
| 134 | #define dprintf if (Debug) printf |
| 135 | |
| 136 | #define MAXUNAMES 20 /* maximum number of user names */ |
| 137 | |
| 138 | #ifdef NEED_BZERO_ETC |
| 139 | #include <fcntl.h> |
| 140 | bzero(b, length) |
| 141 | char *b; |
| 142 | int length; |
| 143 | { |
| 144 | while (--length >= 0) |
| 145 | *b++ = '\0'; |
| 146 | } |
| 147 | bcopy(b1, b2, length) |
| 148 | char *b1; |
| 149 | char *b2; |
| 150 | int length; |
| 151 | { |
| 152 | while (--length >= 0) |
| 153 | *b2++ = *b1++; |
| 154 | } |
| 155 | setlinebuf(f) |
| 156 | FILE *f; |
| 157 | { |
| 158 | setbuf(f, (char *)NULL); |
| 159 | } |
| 160 | wait3(status, flags, np) |
| 161 | WAITVALUE *status; |
| 162 | int flags; |
| 163 | struct rusage *np; |
| 164 | { |
| 165 | return waitpid(-1, status, WNOHANG); |
| 166 | } |
| 167 | |
| 168 | /* Not a general mask handler -- it know what we call, below. */ |
| 169 | SIGHANDLER (*oldhup)(), (*oldalrm)(); |
| 170 | int |
| 171 | sigsetmask(omask) |
| 172 | int omask; |
| 173 | { |
| 174 | if (omask & sigmask(SIGHUP)) |
| 175 | (void) signal(SIGHUP, oldhup); |
| 176 | if (omask & sigmask(SIGALRM)) |
| 177 | (void) signal(SIGALRM, oldalrm); |
| 178 | } |
| 179 | int |
| 180 | sigblock(mask) |
| 181 | int mask; |
| 182 | { |
| 183 | if (mask & sigmask(SIGHUP)) |
| 184 | oldhup = signal(SIGHUP, SIG_IGN); |
| 185 | if (mask & sigmask(SIGALRM)) |
| 186 | oldhup = signal(SIGALRM, SIG_IGN); |
| 187 | } |
| 188 | #endif |
| 189 | |
| 190 | /* |
| 191 | * Flags to logmsg(). |
| 192 | */ |
| 193 | |
| 194 | #define IGN_CONS 0x001 /* don't print on console */ |
| 195 | #define SYNC_FILE 0x002 /* do fsync on file after printing */ |
| 196 | #define ADDDATE 0x004 /* add a date to the message */ |
| 197 | #define MARK 0x008 /* this message is a mark */ |
| 198 | |
| 199 | /* |
| 200 | * This structure represents the files that will have log |
| 201 | * copies printed. |
| 202 | */ |
| 203 | |
| 204 | struct filed { |
| 205 | struct filed *f_nextone; /* next in linked list */ |
| 206 | short f_type; /* entry type, see below */ |
| 207 | short f_file; /* file descriptor */ |
| 208 | time_t f_time; /* time this was last written */ |
| 209 | u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */ |
| 210 | union { |
| 211 | char f_uname[MAXUNAMES][UT_NAMESIZE+1]; |
| 212 | struct { |
| 213 | char f_hname[MAXHOSTNAMELEN+1]; |
| 214 | struct sockaddr_in f_addr; |
| 215 | } f_forw; /* forwarding address */ |
| 216 | char f_fname[MAXPATHLEN]; |
| 217 | } f_un; |
| 218 | char f_prevline[MAXSVLINE]; /* last message logged */ |
| 219 | char f_lasttime[16]; /* time of last occurrence */ |
| 220 | char f_prevhost[MAXHOSTNAMELEN+1]; /* host from which recd. */ |
| 221 | int f_prevpri; /* pri of f_prevline */ |
| 222 | int f_prevlen; /* length of f_prevline */ |
| 223 | int f_prevcount; /* repetition cnt of prevline */ |
| 224 | int f_repeatcount; /* number of "repeated" msgs */ |
| 225 | }; |
| 226 | |
| 227 | /* |
| 228 | * Intervals at which we flush out "message repeated" messages, |
| 229 | * in seconds after previous message is logged. After each flush, |
| 230 | * we move to the next interval until we reach the largest. |
| 231 | */ |
| 232 | int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ |
| 233 | #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) |
| 234 | #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) |
| 235 | #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \ |
| 236 | (f)->f_repeatcount = MAXREPEAT; \ |
| 237 | } |
| 238 | |
| 239 | /* values for f_type */ |
| 240 | #define F_UNUSED 0 /* unused entry */ |
| 241 | #define F_FILE 1 /* regular file */ |
| 242 | #define F_TTY 2 /* terminal */ |
| 243 | #define F_CONSOLE 3 /* console terminal */ |
| 244 | #define F_FORW 4 /* remote machine */ |
| 245 | #define F_USERS 5 /* list of users */ |
| 246 | #define F_WALL 6 /* everyone logged on */ |
| 247 | |
| 248 | char *TypeNames[7] = { |
| 249 | "UNUSED", "FILE", "TTY", "CONSOLE", |
| 250 | "FORW", "USERS", "WALL" |
| 251 | }; |
| 252 | |
| 253 | struct filed *Files; |
| 254 | struct filed consfile; |
| 255 | |
| 256 | int Debug; /* debug flag */ |
| 257 | char LocalHostName[MAXHOSTNAMELEN+1]; /* our hostname */ |
| 258 | char *LocalDomain; /* our local domain name */ |
| 259 | int InetInuse = 0; /* non-zero if INET sockets are being used */ |
| 260 | int finet; /* Internet datagram socket */ |
| 261 | int LogPort; /* port number for INET connections */ |
| 262 | int Initialized = 0; /* set when we have initialized ourselves */ |
| 263 | int MarkInterval = 20 * 60; /* interval between marks in seconds */ |
| 264 | int MarkSeq = 0; /* mark sequence number */ |
| 265 | |
| 266 | extern int errno; |
| 267 | extern char *ctime(), *strchr(), *malloc(); |
| 268 | SIGHANDLER die(), domark(), init(), reapchild(); |
| 269 | |
| 270 | int |
| 271 | main(argc, argv) |
| 272 | int argc; |
| 273 | char **argv; |
| 274 | { |
| 275 | register int i; |
| 276 | register char *p; |
| 277 | int funix, inetm, fklog, klogm, len; |
| 278 | struct sockaddr_un sunx, fromunix; |
| 279 | struct sockaddr_in sin, frominet; |
| 280 | FILE *fp; |
| 281 | int ch; |
| 282 | char line[MSG_BSIZE + 1]; |
| 283 | extern int optind; |
| 284 | extern char *optarg; |
| 285 | |
| 286 | while ((ch = getopt(argc, argv, "df:m:p:")) != EOF) |
| 287 | switch((char)ch) { |
| 288 | case 'd': /* debug */ |
| 289 | Debug++; |
| 290 | break; |
| 291 | case 'f': /* configuration file */ |
| 292 | ConfFile = optarg; |
| 293 | break; |
| 294 | case 'm': /* mark interval */ |
| 295 | MarkInterval = atoi(optarg) * 60; |
| 296 | break; |
| 297 | case 'p': /* path */ |
| 298 | LogName = optarg; |
| 299 | break; |
| 300 | case '?': |
| 301 | default: |
| 302 | usage(); |
| 303 | } |
| 304 | if (argc -= optind) |
| 305 | usage(); |
| 306 | |
| 307 | if (!Debug) |
| 308 | daemon(0, 0); |
| 309 | else |
| 310 | setlinebuf(stdout); |
| 311 | |
| 312 | consfile.f_type = F_CONSOLE; |
| 313 | (void) strcpy(consfile.f_un.f_fname, ctty); |
| 314 | (void) gethostname(LocalHostName, sizeof LocalHostName); |
| 315 | if (p = strchr(LocalHostName, '.')) { |
| 316 | *p++ = '\0'; |
| 317 | LocalDomain = p; |
| 318 | } |
| 319 | else |
| 320 | LocalDomain = ""; |
| 321 | (void) signal(SIGTERM, die); |
| 322 | if (Debug) { |
| 323 | (void) signal(SIGINT, die); |
| 324 | (void) signal(SIGQUIT, die); |
| 325 | } |
| 326 | else { |
| 327 | (void) signal(SIGINT, SIG_IGN); |
| 328 | (void) signal(SIGQUIT, SIG_IGN); |
| 329 | } |
| 330 | (void) signal(SIGCHLD, reapchild); |
| 331 | (void) signal(SIGALRM, domark); |
| 332 | (void) alarm(TIMERINTVL); |
| 333 | (void) unlink(LogName); |
| 334 | |
| 335 | bzero((char *)&sunx, sizeof(sunx)); |
| 336 | sunx.sun_family = AF_UNIX; |
| 337 | (void) strncpy(sunx.sun_path, LogName, sizeof sunx.sun_path); |
| 338 | funix = socket(AF_UNIX, SOCK_DGRAM, 0); |
| 339 | if (funix < 0 || bind(funix, (struct sockaddr *) &sunx, |
| 340 | sizeof(sunx)) < 0 || |
| 341 | chmod(LogName, 0666) < 0) { |
| 342 | (void) sprintf(line, "cannot create %s", LogName); |
| 343 | logerror(line); |
| 344 | dprintf("cannot create %s (%d)\n", LogName, errno); |
| 345 | die(0); |
| 346 | } |
| 347 | #ifdef DO_INET_SOCKET |
| 348 | finet = socket(AF_INET, SOCK_DGRAM, 0); |
| 349 | if (finet >= 0) { |
| 350 | struct servent *sp; |
| 351 | |
| 352 | sp = getservbyname("syslog", "udp"); |
| 353 | if (sp == NULL) { |
| 354 | errno = 0; |
| 355 | logerror("syslog/udp: unknown service"); |
| 356 | die(0); |
| 357 | } |
| 358 | bzero((char *)&sin, sizeof(sin)); /* added uunet!rbj */ |
| 359 | sin.sin_family = AF_INET; |
| 360 | sin.sin_addr.s_addr = INADDR_ANY; |
| 361 | sin.sin_port = LogPort = htons(sp->s_port); |
| 362 | if (bind(finet, (struct sockaddr *)&sin, sizeof(sin)) < 0) { |
| 363 | logerror("bind"); |
| 364 | if (!Debug) |
| 365 | die(0); |
| 366 | } else { |
| 367 | inetm = FDMASK(finet); |
| 368 | InetInuse = 1; |
| 369 | } |
| 370 | } |
| 371 | #else |
| 372 | finet = -1; |
| 373 | inetm = 0; |
| 374 | #endif /* DO_INET_SOCKET */ |
| 375 | #ifdef _PATH_KLOG |
| 376 | if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0) |
| 377 | klogm = FDMASK(fklog); |
| 378 | else { |
| 379 | dprintf("can't open %s (%d)\n", _PATH_KLOG, errno); |
| 380 | klogm = 0; |
| 381 | } |
| 382 | #else |
| 383 | fklog = -1; |
| 384 | klogm = 0; |
| 385 | #endif /* _PATH_KLOG */ |
| 386 | |
| 387 | /* tuck my process id away */ |
| 388 | fp = fopen(PidFile, "w"); |
| 389 | if (fp != NULL) { |
| 390 | fprintf(fp, "%d\n", getpid()); |
| 391 | (void) fclose(fp); |
| 392 | } |
| 393 | |
| 394 | dprintf("off & running....\n"); |
| 395 | |
| 396 | init(); |
| 397 | (void) signal(SIGHUP, init); |
| 398 | |
| 399 | for (;;) { |
| 400 | int nfds, readfds = FDMASK(funix) | inetm | klogm; |
| 401 | |
| 402 | errno = 0; |
| 403 | dprintf("readfds = %#x\n", readfds); |
| 404 | nfds = select(20, (fd_set *) &readfds, (fd_set *) NULL, |
| 405 | (fd_set *) NULL, (struct timeval *) NULL); |
| 406 | if (nfds == 0) |
| 407 | continue; |
| 408 | if (nfds < 0) { |
| 409 | if (errno != EINTR) |
| 410 | logerror("select"); |
| 411 | continue; |
| 412 | } |
| 413 | dprintf("got a message (%d, %#x)\n", nfds, readfds); |
| 414 | if (readfds & klogm) { |
| 415 | i = read(fklog, line, sizeof(line) - 1); |
| 416 | if (i > 0) { |
| 417 | line[i] = '\0'; |
| 418 | printsys(line); |
| 419 | } else if (i < 0 && errno != EINTR) { |
| 420 | logerror("klog"); |
| 421 | fklog = -1; |
| 422 | klogm = 0; |
| 423 | } |
| 424 | } |
| 425 | if (readfds & FDMASK(funix)) { |
| 426 | len = sizeof fromunix; |
| 427 | i = recvfrom(funix, line, MAXLINE, 0, |
| 428 | (struct sockaddr *) &fromunix, &len); |
| 429 | if (i > 0) { |
| 430 | line[i] = '\0'; |
| 431 | printline(LocalHostName, line); |
| 432 | } else if (i < 0 && errno != EINTR) |
| 433 | logerror("recvfrom unix"); |
| 434 | } |
| 435 | if (readfds & inetm) { |
| 436 | len = sizeof frominet; |
| 437 | i = recvfrom(finet, line, MAXLINE, 0, |
| 438 | (struct sockaddr *) &frominet, &len); |
| 439 | if (i > 0) { |
| 440 | extern char *cvthname(); |
| 441 | |
| 442 | line[i] = '\0'; |
| 443 | printline(cvthname(&frominet), line); |
| 444 | } else if (i < 0 && errno != EINTR) |
| 445 | logerror("recvfrom inet"); |
| 446 | } |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | usage() |
| 451 | { |
| 452 | (void) fprintf(stderr, |
| 453 | "usage: syslogd [-d] [-f conffile] [-m markinterval] [-p path]\n"); |
| 454 | exit(1); |
| 455 | } |
| 456 | |
| 457 | /* |
| 458 | * Take a raw input line, decode the message, and print the message |
| 459 | * on the appropriate log files. |
| 460 | */ |
| 461 | |
| 462 | printline(hname, msg) |
| 463 | char *hname; |
| 464 | char *msg; |
| 465 | { |
| 466 | register char *p, *q; |
| 467 | register int c; |
| 468 | char line[MAXLINE + 1]; |
| 469 | int pri; |
| 470 | |
| 471 | /* test for special codes */ |
| 472 | pri = DEFUPRI; |
| 473 | p = msg; |
| 474 | if (*p == '<') { |
| 475 | pri = 0; |
| 476 | while (isdigit(*++p)) |
| 477 | pri = 10 * pri + (*p - '0'); |
| 478 | if (*p == '>') |
| 479 | ++p; |
| 480 | } |
| 481 | if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) |
| 482 | pri = DEFUPRI; |
| 483 | |
| 484 | /* don't allow users to log kernel messages */ |
| 485 | if (LOG_FAC(pri) == LOG_KERN) |
| 486 | pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); |
| 487 | |
| 488 | q = line; |
| 489 | |
| 490 | while ((c = *p++ & 0177) != '\0' && |
| 491 | q < &line[sizeof(line) - 1]) |
| 492 | if (iscntrl(c)) |
| 493 | if (c == '\n') |
| 494 | *q++ = ' '; |
| 495 | else if (c == '\t') |
| 496 | *q++ = '\t'; |
| 497 | else { |
| 498 | *q++ = '^'; |
| 499 | *q++ = c ^ 0100; |
| 500 | } |
| 501 | else |
| 502 | *q++ = c; |
| 503 | *q = '\0'; |
| 504 | |
| 505 | logmsg(pri, line, hname, 0); |
| 506 | } |
| 507 | |
| 508 | /* |
| 509 | * Take a raw input line from /dev/klog, split and format similar to syslog(). |
| 510 | */ |
| 511 | |
| 512 | printsys(msg) |
| 513 | char *msg; |
| 514 | { |
| 515 | register char *p, *q; |
| 516 | register int c; |
| 517 | char line[MAXLINE + 1]; |
| 518 | int pri, flags; |
| 519 | char *lp; |
| 520 | |
| 521 | (void) strcpy(line, "vmunix: "); |
| 522 | lp = line + strlen(line); |
| 523 | for (p = msg; *p != '\0'; ) { |
| 524 | flags = SYNC_FILE | ADDDATE; /* fsync file after write */ |
| 525 | pri = DEFSPRI; |
| 526 | if (*p == '<') { |
| 527 | pri = 0; |
| 528 | while (isdigit(*++p)) |
| 529 | pri = 10 * pri + (*p - '0'); |
| 530 | if (*p == '>') |
| 531 | ++p; |
| 532 | } else { |
| 533 | /* kernel printf's come out on console */ |
| 534 | flags |= IGN_CONS; |
| 535 | } |
| 536 | if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) |
| 537 | pri = DEFSPRI; |
| 538 | q = lp; |
| 539 | while (*p != '\0' && (c = *p++) != '\n' && |
| 540 | q < &line[MAXLINE]) |
| 541 | *q++ = c; |
| 542 | *q = '\0'; |
| 543 | logmsg(pri, line, LocalHostName, flags); |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | |
| 548 | #ifdef VERBOSE_DEBUG |
| 549 | /* |
| 550 | * Decode a numeric value to a symbolic name |
| 551 | */ |
| 552 | char * |
| 553 | edoced(val, codetab) |
| 554 | int val; |
| 555 | CODE *codetab; |
| 556 | { |
| 557 | register CODE *c; |
| 558 | |
| 559 | if (val >= 0) |
| 560 | for (c = codetab; c->c_val != -1; c++) |
| 561 | if (c->c_val == val) |
| 562 | return (c->c_name); |
| 563 | return ("???"); |
| 564 | } |
| 565 | #endif |
| 566 | |
| 567 | time_t now; |
| 568 | |
| 569 | /* |
| 570 | * Log a message to the appropriate log files, users, etc. based on |
| 571 | * the priority. |
| 572 | */ |
| 573 | |
| 574 | logmsg(pri, msg, from, flags) |
| 575 | int pri; |
| 576 | char *msg, *from; |
| 577 | int flags; |
| 578 | { |
| 579 | register struct filed *f; |
| 580 | int fac, prilev; |
| 581 | int omask, msglen; |
| 582 | char *timestamp; |
| 583 | time_t time(); |
| 584 | |
| 585 | #ifdef VERBOSE_DEBUG |
| 586 | if (Debug) { |
| 587 | int pfac = (flags & MARK) ? INTERNAL_MARK : (pri & LOG_FACMASK); |
| 588 | printf("logmsg: {%s.%s} pri %o, flags %x, from %s, msg %s\n", |
| 589 | edoced(pfac, facilitynames), |
| 590 | edoced(LOG_PRI(pri), prioritynames), |
| 591 | pri, flags, from, msg); |
| 592 | } |
| 593 | #else |
| 594 | dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n", |
| 595 | pri, flags, from, msg); |
| 596 | #endif |
| 597 | |
| 598 | omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM)); |
| 599 | |
| 600 | /* |
| 601 | * Check to see if msg looks non-standard. |
| 602 | */ |
| 603 | msglen = strlen(msg); |
| 604 | if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' || |
| 605 | msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') |
| 606 | flags |= ADDDATE; |
| 607 | |
| 608 | (void) time(&now); |
| 609 | if (flags & ADDDATE) |
| 610 | timestamp = ctime(&now) + 4; |
| 611 | else { |
| 612 | timestamp = msg; |
| 613 | msg += 16; |
| 614 | msglen -= 16; |
| 615 | } |
| 616 | |
| 617 | /* extract facility and priority level */ |
| 618 | if (flags & MARK) |
| 619 | fac = LOG_NFACILITIES; |
| 620 | else |
| 621 | fac = LOG_FAC(pri); |
| 622 | prilev = LOG_PRI(pri); |
| 623 | |
| 624 | /* log the message to the particular outputs */ |
| 625 | if (!Initialized) { |
| 626 | f = &consfile; |
| 627 | f->f_file = open(ctty, O_WRONLY, 0); |
| 628 | |
| 629 | if (f->f_file >= 0) { |
| 630 | fprintlog(f, flags, msg); |
| 631 | (void) close(f->f_file); |
| 632 | } |
| 633 | (void) sigsetmask(omask); |
| 634 | return; |
| 635 | } |
| 636 | for (f = Files; f; f = f->f_nextone) { |
| 637 | /* skip messages that are incorrect priority */ |
| 638 | if ((int)f->f_pmask[fac] < prilev || |
| 639 | f->f_pmask[fac] == INTERNAL_NOPRI) |
| 640 | continue; |
| 641 | |
| 642 | if (f->f_type == F_CONSOLE && (flags & IGN_CONS)) |
| 643 | continue; |
| 644 | |
| 645 | /* don't output marks to recently written files */ |
| 646 | if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2) |
| 647 | continue; |
| 648 | |
| 649 | /* |
| 650 | * suppress duplicate lines to this file |
| 651 | */ |
| 652 | if ((flags & MARK) == 0 && msglen == f->f_prevlen && |
| 653 | !strcmp(msg, f->f_prevline) && |
| 654 | !strcmp(from, f->f_prevhost)) { |
| 655 | (void) strncpy(f->f_lasttime, timestamp, 15); |
| 656 | f->f_prevcount++; |
| 657 | dprintf("msg repeated %d times, %ld sec of %d\n", |
| 658 | f->f_prevcount, now - f->f_time, |
| 659 | repeatinterval[f->f_repeatcount]); |
| 660 | /* |
| 661 | * If domark would have logged this by now, |
| 662 | * flush it now (so we don't hold isolated messages), |
| 663 | * but back off so we'll flush less often |
| 664 | * in the future. |
| 665 | */ |
| 666 | if (now > REPEATTIME(f)) { |
| 667 | fprintlog(f, flags, (char *)NULL); |
| 668 | BACKOFF(f); |
| 669 | } |
| 670 | } else { |
| 671 | /* new line, save it */ |
| 672 | if (f->f_prevcount) |
| 673 | fprintlog(f, 0, (char *)NULL); |
| 674 | f->f_repeatcount = 0; |
| 675 | (void) strncpy(f->f_lasttime, timestamp, 15); |
| 676 | (void) strncpy(f->f_prevhost, from, |
| 677 | sizeof(f->f_prevhost)); |
| 678 | if (msglen < MAXSVLINE) { |
| 679 | f->f_prevlen = msglen; |
| 680 | f->f_prevpri = pri; |
| 681 | (void) strcpy(f->f_prevline, msg); |
| 682 | fprintlog(f, flags, (char *)NULL); |
| 683 | } else { |
| 684 | f->f_prevline[0] = 0; |
| 685 | f->f_prevlen = 0; |
| 686 | fprintlog(f, flags, msg); |
| 687 | } |
| 688 | } |
| 689 | } |
| 690 | (void) sigsetmask(omask); |
| 691 | } |
| 692 | |
| 693 | fprintlog(f, flags, msg) |
| 694 | register struct filed *f; |
| 695 | int flags; |
| 696 | char *msg; |
| 697 | { |
| 698 | struct iovec iov[6]; |
| 699 | register struct iovec *v; |
| 700 | register int l; |
| 701 | char line[MAXLINE + 1], repbuf[80], greetings[200]; |
| 702 | |
| 703 | v = iov; |
| 704 | if (f->f_type == F_WALL) { |
| 705 | v->iov_base = greetings; |
| 706 | sprintf(greetings, |
| 707 | "\r\n\7Message from syslogd@%s at %.24s ...\r\n", |
| 708 | f->f_prevhost, ctime(&now)); |
| 709 | v->iov_len = strlen(greetings); |
| 710 | v++; |
| 711 | v->iov_base = ""; |
| 712 | v->iov_len = 0; |
| 713 | v++; |
| 714 | } else { |
| 715 | v->iov_base = f->f_lasttime; |
| 716 | v->iov_len = 15; |
| 717 | v++; |
| 718 | v->iov_base = " "; |
| 719 | v->iov_len = 1; |
| 720 | v++; |
| 721 | } |
| 722 | v->iov_base = f->f_prevhost; |
| 723 | v->iov_len = strlen(v->iov_base); |
| 724 | v++; |
| 725 | v->iov_base = " "; |
| 726 | v->iov_len = 1; |
| 727 | v++; |
| 728 | |
| 729 | if (msg) { |
| 730 | v->iov_base = msg; |
| 731 | v->iov_len = strlen(msg); |
| 732 | } else if (f->f_prevcount > 1) { |
| 733 | v->iov_base = repbuf; |
| 734 | sprintf(repbuf, "last message repeated %d times", |
| 735 | f->f_prevcount); |
| 736 | v->iov_len = strlen(repbuf); |
| 737 | } else { |
| 738 | v->iov_base = f->f_prevline; |
| 739 | v->iov_len = f->f_prevlen; |
| 740 | } |
| 741 | v++; |
| 742 | |
| 743 | dprintf("Logging to %s", TypeNames[f->f_type]); |
| 744 | f->f_time = now; |
| 745 | |
| 746 | switch (f->f_type) { |
| 747 | case F_UNUSED: |
| 748 | dprintf("\n"); |
| 749 | break; |
| 750 | |
| 751 | case F_FORW: |
| 752 | dprintf(" %s\n", f->f_un.f_forw.f_hname); |
| 753 | sprintf(line, "<%d>%.15s %s", f->f_prevpri, |
| 754 | iov[0].iov_base, iov[4].iov_base); |
| 755 | l = strlen(line); |
| 756 | if (l > MAXLINE) |
| 757 | l = MAXLINE; |
| 758 | if (sendto(finet, line, l, 0, &f->f_un.f_forw.f_addr, |
| 759 | sizeof f->f_un.f_forw.f_addr) != l) { |
| 760 | int e = errno; |
| 761 | (void) close(f->f_file); |
| 762 | f->f_type = F_UNUSED; |
| 763 | errno = e; |
| 764 | logerror("sendto"); |
| 765 | } |
| 766 | break; |
| 767 | |
| 768 | case F_CONSOLE: |
| 769 | if (flags & IGN_CONS) { |
| 770 | dprintf(" (ignored)\n"); |
| 771 | break; |
| 772 | } |
| 773 | /* FALLTHROUGH */ |
| 774 | |
| 775 | case F_TTY: |
| 776 | case F_FILE: |
| 777 | dprintf(" %s\n", f->f_un.f_fname); |
| 778 | if (f->f_type != F_FILE) { |
| 779 | v->iov_base = "\r\n"; |
| 780 | v->iov_len = 2; |
| 781 | } else { |
| 782 | v->iov_base = "\n"; |
| 783 | v->iov_len = 1; |
| 784 | } |
| 785 | again: |
| 786 | if (writev(f->f_file, iov, 6) < 0) { |
| 787 | int e = errno; |
| 788 | (void) close(f->f_file); |
| 789 | /* |
| 790 | * Check for errors on TTY's due to loss of tty |
| 791 | */ |
| 792 | if ((e == EIO || e == EBADF) && f->f_type != F_FILE) { |
| 793 | f->f_file = open(f->f_un.f_fname, |
| 794 | O_WRONLY|O_APPEND, 0); |
| 795 | if (f->f_file < 0) { |
| 796 | f->f_type = F_UNUSED; |
| 797 | logerror(f->f_un.f_fname); |
| 798 | } else |
| 799 | goto again; |
| 800 | } else { |
| 801 | f->f_type = F_UNUSED; |
| 802 | errno = e; |
| 803 | logerror(f->f_un.f_fname); |
| 804 | } |
| 805 | } else if (flags & SYNC_FILE) |
| 806 | (void) fsync(f->f_file); |
| 807 | break; |
| 808 | |
| 809 | case F_USERS: |
| 810 | case F_WALL: |
| 811 | dprintf("\n"); |
| 812 | v->iov_base = "\r\n"; |
| 813 | v->iov_len = 2; |
| 814 | wallmsg(f, iov); |
| 815 | break; |
| 816 | } |
| 817 | f->f_prevcount = 0; |
| 818 | } |
| 819 | |
| 820 | /* |
| 821 | * WALLMSG -- Write a message to the world at large |
| 822 | * |
| 823 | * Write the specified message to either the entire |
| 824 | * world, or a list of approved users. |
| 825 | */ |
| 826 | |
| 827 | wallmsg(f, iov) |
| 828 | register struct filed *f; |
| 829 | struct iovec *iov; |
| 830 | { |
| 831 | static int reenter; /* avoid calling ourselves */ |
| 832 | register FILE *uf; |
| 833 | register int i; |
| 834 | struct utmp ut; |
| 835 | char *p, *ttymsg(); |
| 836 | |
| 837 | if (reenter++) |
| 838 | return; |
| 839 | if ((uf = fopen(_PATH_UTMP, "r")) == NULL) { |
| 840 | logerror(_PATH_UTMP); |
| 841 | reenter = 0; |
| 842 | return; |
| 843 | } |
| 844 | /* NOSTRICT */ |
| 845 | while (fread((char *) &ut, sizeof ut, 1, uf) == 1) { |
| 846 | if (ut.ut_name[0] == '\0') |
| 847 | continue; |
| 848 | if (f->f_type == F_WALL) { |
| 849 | if (p = ttymsg(iov, 6, ut.ut_line, 1)) { |
| 850 | errno = 0; /* already in msg */ |
| 851 | logerror(p); |
| 852 | } |
| 853 | continue; |
| 854 | } |
| 855 | /* should we send the message to this user? */ |
| 856 | for (i = 0; i < MAXUNAMES; i++) { |
| 857 | if (!f->f_un.f_uname[i][0]) |
| 858 | break; |
| 859 | if (!strncmp(f->f_un.f_uname[i], ut.ut_name, |
| 860 | UT_NAMESIZE)) { |
| 861 | if (p = ttymsg(iov, 6, ut.ut_line, 1)) { |
| 862 | errno = 0; /* already in msg */ |
| 863 | logerror(p); |
| 864 | } |
| 865 | break; |
| 866 | } |
| 867 | } |
| 868 | } |
| 869 | (void) fclose(uf); |
| 870 | reenter = 0; |
| 871 | } |
| 872 | |
| 873 | SIGHANDLER |
| 874 | reapchild() |
| 875 | { |
| 876 | WAITVALUE status; |
| 877 | |
| 878 | while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0) |
| 879 | continue; |
| 880 | } |
| 881 | |
| 882 | /* |
| 883 | * Return a printable representation of a host address. |
| 884 | */ |
| 885 | char * |
| 886 | cvthname(f) |
| 887 | struct sockaddr_in *f; |
| 888 | { |
| 889 | struct hostent *hp; |
| 890 | register char *p; |
| 891 | extern char *inet_ntoa(); |
| 892 | |
| 893 | dprintf("cvthname(%s)\n", inet_ntoa(f->sin_addr)); |
| 894 | |
| 895 | if (f->sin_family != AF_INET) { |
| 896 | dprintf("Malformed from address\n"); |
| 897 | return ("???"); |
| 898 | } |
| 899 | hp = gethostbyaddr(&f->sin_addr, sizeof(struct in_addr), f->sin_family); |
| 900 | if (hp == 0) { |
| 901 | dprintf("Host name for your address (%s) unknown\n", |
| 902 | inet_ntoa(f->sin_addr)); |
| 903 | return (inet_ntoa(f->sin_addr)); |
| 904 | } |
| 905 | if ((p = strchr(hp->h_name, '.')) && strcmp(p + 1, LocalDomain) == 0) |
| 906 | *p = '\0'; |
| 907 | return (hp->h_name); |
| 908 | } |
| 909 | |
| 910 | SIGHANDLER |
| 911 | domark() |
| 912 | { |
| 913 | register struct filed *f; |
| 914 | time_t time(); |
| 915 | |
| 916 | now = time((time_t *)NULL); |
| 917 | MarkSeq += TIMERINTVL; |
| 918 | if (MarkSeq >= MarkInterval) { |
| 919 | logmsg(LOG_INFO, "-- MARK --", LocalHostName, ADDDATE|MARK); |
| 920 | MarkSeq = 0; |
| 921 | } |
| 922 | |
| 923 | for (f = Files; f; f = f->f_nextone) { |
| 924 | if (f->f_prevcount && now >= REPEATTIME(f)) { |
| 925 | dprintf("flush %s: repeated %d times, %d sec.\n", |
| 926 | TypeNames[f->f_type], f->f_prevcount, |
| 927 | repeatinterval[f->f_repeatcount]); |
| 928 | fprintlog(f, 0, (char *)NULL); |
| 929 | BACKOFF(f); |
| 930 | } |
| 931 | } |
| 932 | (void) alarm(TIMERINTVL); |
| 933 | } |
| 934 | |
| 935 | static char * |
| 936 | xstrerror() |
| 937 | { |
| 938 | extern int sys_nerr; |
| 939 | extern char *sys_errlist[]; |
| 940 | extern int errno; |
| 941 | static char buff[30]; |
| 942 | |
| 943 | if (errno >= 0 && errno < sys_nerr) |
| 944 | return sys_errlist[errno]; |
| 945 | (void)sprintf(buff, "Error code %d\n", errno); |
| 946 | return buff; |
| 947 | } |
| 948 | |
| 949 | /* |
| 950 | * Print syslogd errors some place. |
| 951 | */ |
| 952 | logerror(type) |
| 953 | char *type; |
| 954 | { |
| 955 | char buf[100]; |
| 956 | |
| 957 | if (errno) |
| 958 | (void) sprintf(buf, "syslogd: %s: %s", type, xstrerror(errno)); |
| 959 | else |
| 960 | (void) sprintf(buf, "syslogd: %s", type); |
| 961 | errno = 0; |
| 962 | dprintf("%s\n", buf); |
| 963 | logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE); |
| 964 | } |
| 965 | |
| 966 | SIGHANDLER |
| 967 | die(sig) |
| 968 | { |
| 969 | register struct filed *f; |
| 970 | char buf[100]; |
| 971 | |
| 972 | for (f = Files; f != NULL; f = f->f_nextone) { |
| 973 | /* flush any pending output */ |
| 974 | if (f->f_prevcount) |
| 975 | fprintlog(f, 0, (char *)NULL); |
| 976 | } |
| 977 | if (sig) { |
| 978 | dprintf("syslogd: exiting on signal %d\n", sig); |
| 979 | (void) sprintf(buf, "exiting on signal %d", sig); |
| 980 | errno = 0; |
| 981 | logerror(buf); |
| 982 | } |
| 983 | (void) unlink(LogName); |
| 984 | exit(0); |
| 985 | } |
| 986 | |
| 987 | /* |
| 988 | * INIT -- Initialize syslogd from configuration table |
| 989 | */ |
| 990 | |
| 991 | SIGHANDLER |
| 992 | init() |
| 993 | { |
| 994 | register int i; |
| 995 | register FILE *cf; |
| 996 | register struct filed *f, *next, **nextp; |
| 997 | register char *p; |
| 998 | char cline[BUFSIZ]; |
| 999 | |
| 1000 | dprintf("init\n"); |
| 1001 | |
| 1002 | /* |
| 1003 | * Close all open log files. |
| 1004 | */ |
| 1005 | Initialized = 0; |
| 1006 | for (f = Files; f != NULL; f = next) { |
| 1007 | /* flush any pending output */ |
| 1008 | if (f->f_prevcount) |
| 1009 | fprintlog(f, 0, (char *)NULL); |
| 1010 | |
| 1011 | switch (f->f_type) { |
| 1012 | case F_FILE: |
| 1013 | case F_TTY: |
| 1014 | case F_CONSOLE: |
| 1015 | case F_FORW: |
| 1016 | (void) close(f->f_file); |
| 1017 | break; |
| 1018 | } |
| 1019 | next = f->f_nextone; |
| 1020 | free((char *) f); |
| 1021 | } |
| 1022 | Files = NULL; |
| 1023 | nextp = &Files; |
| 1024 | |
| 1025 | /* open the configuration file */ |
| 1026 | if ((cf = fopen(ConfFile, "r")) == NULL) { |
| 1027 | dprintf("cannot open %s\n", ConfFile); |
| 1028 | *nextp = (struct filed *)malloc(sizeof(*f)); |
| 1029 | cfline("*.ERR\t/dev/console", *nextp); |
| 1030 | (*nextp)->f_nextone = (struct filed *)malloc(sizeof(*f)); |
| 1031 | cfline("*.PANIC\t*", (*nextp)->f_nextone); |
| 1032 | Initialized = 1; |
| 1033 | return; |
| 1034 | } |
| 1035 | |
| 1036 | /* |
| 1037 | * Foreach line in the conf table, open that file. |
| 1038 | */ |
| 1039 | f = NULL; |
| 1040 | while (fgets(cline, sizeof cline, cf) != NULL) { |
| 1041 | /* |
| 1042 | * check for end-of-section, comments, strip off trailing |
| 1043 | * spaces and newline character. |
| 1044 | */ |
| 1045 | for (p = cline; isspace(*p); ++p); |
| 1046 | if (*p == NULL || *p == '#') |
| 1047 | continue; |
| 1048 | for (p = strchr(cline, '\0'); isspace(*--p);); |
| 1049 | *++p = '\0'; |
| 1050 | f = (struct filed *)malloc(sizeof(*f)); |
| 1051 | *nextp = f; |
| 1052 | nextp = &f->f_nextone; |
| 1053 | cfline(cline, f); |
| 1054 | } |
| 1055 | |
| 1056 | /* close the configuration file */ |
| 1057 | (void) fclose(cf); |
| 1058 | |
| 1059 | Initialized = 1; |
| 1060 | |
| 1061 | if (Debug) { |
| 1062 | for (f = Files; f; f = f->f_nextone) { |
| 1063 | for (i = 0; i <= LOG_NFACILITIES; i++) |
| 1064 | if (f->f_pmask[i] == INTERNAL_NOPRI) |
| 1065 | printf("X "); |
| 1066 | else |
| 1067 | printf("%d ", f->f_pmask[i]); |
| 1068 | printf("%s: ", TypeNames[f->f_type]); |
| 1069 | switch (f->f_type) { |
| 1070 | case F_FILE: |
| 1071 | case F_TTY: |
| 1072 | case F_CONSOLE: |
| 1073 | printf("%s", f->f_un.f_fname); |
| 1074 | break; |
| 1075 | |
| 1076 | case F_FORW: |
| 1077 | printf("%s", f->f_un.f_forw.f_hname); |
| 1078 | break; |
| 1079 | |
| 1080 | case F_USERS: |
| 1081 | for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++) |
| 1082 | printf("%s, ", f->f_un.f_uname[i]); |
| 1083 | break; |
| 1084 | } |
| 1085 | printf("\n"); |
| 1086 | } |
| 1087 | } |
| 1088 | |
| 1089 | logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE); |
| 1090 | dprintf("syslogd: restarted\n"); |
| 1091 | } |
| 1092 | |
| 1093 | /* |
| 1094 | * Crack a configuration file line |
| 1095 | */ |
| 1096 | |
| 1097 | cfline(line, f) |
| 1098 | char *line; |
| 1099 | register struct filed *f; |
| 1100 | { |
| 1101 | register char *p; |
| 1102 | register char *q; |
| 1103 | register int i; |
| 1104 | char *bp; |
| 1105 | int pri; |
| 1106 | struct hostent *hp; |
| 1107 | char buf[MAXLINE]; |
| 1108 | |
| 1109 | dprintf("cfline(%s)\n", line); |
| 1110 | |
| 1111 | errno = 0; /* keep strerror() stuff out of logerror messages */ |
| 1112 | |
| 1113 | /* clear out file entry */ |
| 1114 | bzero((char *) f, sizeof *f); |
| 1115 | for (i = 0; i <= LOG_NFACILITIES; i++) |
| 1116 | f->f_pmask[i] = INTERNAL_NOPRI; |
| 1117 | |
| 1118 | /* scan through the list of selectors */ |
| 1119 | for (p = line; *p && *p != '\t';) { |
| 1120 | |
| 1121 | /* find the end of this facility name list */ |
| 1122 | for (q = p; *q && *q != '\t' && *q++ != '.'; ) |
| 1123 | continue; |
| 1124 | |
| 1125 | /* collect priority name */ |
| 1126 | for (bp = buf; *q && !strchr("\t,;", *q); ) |
| 1127 | *bp++ = *q++; |
| 1128 | *bp = '\0'; |
| 1129 | |
| 1130 | /* skip cruft */ |
| 1131 | while (strchr(", ;", *q)) |
| 1132 | q++; |
| 1133 | |
| 1134 | /* decode priority name */ |
| 1135 | pri = decode(buf, prioritynames); |
| 1136 | if (pri < 0) { |
| 1137 | char xbuf[200]; |
| 1138 | |
| 1139 | (void) sprintf(xbuf, "unknown priority name \"%s\"", |
| 1140 | buf); |
| 1141 | logerror(xbuf); |
| 1142 | return; |
| 1143 | } |
| 1144 | |
| 1145 | /* scan facilities */ |
| 1146 | while (*p && !strchr("\t.;", *p)) { |
| 1147 | for (bp = buf; *p && !strchr("\t,;.", *p); ) |
| 1148 | *bp++ = *p++; |
| 1149 | *bp = '\0'; |
| 1150 | if (*buf == '*') |
| 1151 | for (i = 0; i < LOG_NFACILITIES; i++) |
| 1152 | f->f_pmask[i] = pri; |
| 1153 | else { |
| 1154 | i = decode(buf, facilitynames); |
| 1155 | if (i < 0) { |
| 1156 | char xbuf[200]; |
| 1157 | |
| 1158 | (void) sprintf(xbuf, |
| 1159 | "unknown facility name \"%s\"", |
| 1160 | buf); |
| 1161 | logerror(xbuf); |
| 1162 | return; |
| 1163 | } |
| 1164 | f->f_pmask[i >> 3] = pri; |
| 1165 | } |
| 1166 | while (*p == ',' || *p == ' ') |
| 1167 | p++; |
| 1168 | } |
| 1169 | |
| 1170 | p = q; |
| 1171 | } |
| 1172 | |
| 1173 | /* skip to action part */ |
| 1174 | while (*p == '\t') |
| 1175 | p++; |
| 1176 | |
| 1177 | switch (*p) |
| 1178 | { |
| 1179 | case '@': |
| 1180 | if (!InetInuse) |
| 1181 | break; |
| 1182 | (void) strcpy(f->f_un.f_forw.f_hname, ++p); |
| 1183 | hp = gethostbyname(p); |
| 1184 | if (hp == NULL) { |
| 1185 | logerror("hostname lookup error"); |
| 1186 | break; |
| 1187 | } |
| 1188 | bzero((char *) &f->f_un.f_forw.f_addr, |
| 1189 | sizeof f->f_un.f_forw.f_addr); |
| 1190 | f->f_un.f_forw.f_addr.sin_family = AF_INET; |
| 1191 | f->f_un.f_forw.f_addr.sin_port = LogPort; |
| 1192 | bcopy(hp->h_addr, (char *) &f->f_un.f_forw.f_addr.sin_addr, hp->h_length); |
| 1193 | f->f_type = F_FORW; |
| 1194 | break; |
| 1195 | |
| 1196 | case '/': |
| 1197 | (void) strcpy(f->f_un.f_fname, p); |
| 1198 | if ((f->f_file = open(p, O_WRONLY|O_APPEND, 0)) < 0) { |
| 1199 | f->f_file = F_UNUSED; |
| 1200 | logerror(p); |
| 1201 | break; |
| 1202 | } |
| 1203 | if (isatty(f->f_file)) |
| 1204 | f->f_type = F_TTY; |
| 1205 | else |
| 1206 | f->f_type = F_FILE; |
| 1207 | if (strcmp(p, ctty) == 0) |
| 1208 | f->f_type = F_CONSOLE; |
| 1209 | break; |
| 1210 | |
| 1211 | case '*': |
| 1212 | f->f_type = F_WALL; |
| 1213 | break; |
| 1214 | |
| 1215 | default: |
| 1216 | for (i = 0; i < MAXUNAMES && *p; i++) { |
| 1217 | for (q = p; *q && *q != ','; ) |
| 1218 | q++; |
| 1219 | (void) strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE); |
| 1220 | if ((q - p) > UT_NAMESIZE) |
| 1221 | f->f_un.f_uname[i][UT_NAMESIZE] = '\0'; |
| 1222 | else |
| 1223 | f->f_un.f_uname[i][q - p] = '\0'; |
| 1224 | while (*q == ',' || *q == ' ') |
| 1225 | q++; |
| 1226 | p = q; |
| 1227 | } |
| 1228 | f->f_type = F_USERS; |
| 1229 | break; |
| 1230 | } |
| 1231 | } |
| 1232 | |
| 1233 | |
| 1234 | /* |
| 1235 | * Decode a symbolic name to a numeric value |
| 1236 | */ |
| 1237 | |
| 1238 | decode(name, codetab) |
| 1239 | char *name; |
| 1240 | CODE *codetab; |
| 1241 | { |
| 1242 | register CODE *c; |
| 1243 | register char *p; |
| 1244 | char buf[40]; |
| 1245 | |
| 1246 | if (isdigit(*name)) |
| 1247 | return (atoi(name)); |
| 1248 | |
| 1249 | (void) strcpy(buf, name); |
| 1250 | for (p = buf; *p; p++) |
| 1251 | if (isupper(*p)) |
| 1252 | *p = tolower(*p); |
| 1253 | for (c = codetab; c->c_name; c++) |
| 1254 | if (!strcmp(buf, c->c_name)) |
| 1255 | return (c->c_val); |
| 1256 | |
| 1257 | return (-1); |
| 1258 | } |
| 1259 | |
| 1260 | daemon(nochdir, noclose) |
| 1261 | int nochdir, noclose; |
| 1262 | { |
| 1263 | int cpid; |
| 1264 | |
| 1265 | if ((cpid = fork()) == -1) |
| 1266 | return (-1); |
| 1267 | if (cpid) |
| 1268 | exit(0); |
| 1269 | (void) setsid(); |
| 1270 | if (!nochdir) |
| 1271 | (void) chdir("/"); |
| 1272 | if (!noclose) { |
| 1273 | int devnull = open("/dev/null", O_RDWR, 0); |
| 1274 | |
| 1275 | if (devnull != -1) { |
| 1276 | (void) dup2(devnull, 0); |
| 1277 | (void) dup2(devnull, 1); |
| 1278 | (void) dup2(devnull, 2); |
| 1279 | if (devnull > 2) |
| 1280 | (void) close(devnull); |
| 1281 | } |
| 1282 | } |
| 1283 | } |
| 1284 | |
| 1285 | |
| 1286 | /* |
| 1287 | * Display the contents of a uio structure on a terminal. Used by wall(1) |
| 1288 | * and syslogd(8). Forks and finishes in child if write would block, waiting |
| 1289 | * at most five minutes. Returns pointer to error string on unexpected error; |
| 1290 | * string is not newline-terminated. Various "normal" errors are ignored |
| 1291 | * (exclusive-use, lack of permission, etc.). |
| 1292 | */ |
| 1293 | char * |
| 1294 | ttymsg(iov, iovcnt, line) |
| 1295 | struct iovec *iov; |
| 1296 | int iovcnt; |
| 1297 | char *line; |
| 1298 | { |
| 1299 | static char device[64] = _PATH_DEV; |
| 1300 | static char errbuf[1024]; |
| 1301 | register int cnt, fd, left, wret; |
| 1302 | struct iovec localiov[6]; |
| 1303 | int forked = 0; |
| 1304 | |
| 1305 | if (iovcnt > 6) |
| 1306 | return ("too many iov's"); |
| 1307 | /* |
| 1308 | * open will fail on slip lines or exclusive-use lines |
| 1309 | * if not running as root; not an error. |
| 1310 | */ |
| 1311 | (void) strcpy(device + sizeof(_PATH_DEV) - 1, line); |
| 1312 | if ((fd = open(device, O_WRONLY|O_NONBLOCK, 0)) < 0) { |
| 1313 | if (errno == EBUSY || errno == EACCES) |
| 1314 | return (NULL); |
| 1315 | (void) sprintf(errbuf, "%s: error %d", device, errno); |
| 1316 | return (errbuf); |
| 1317 | } |
| 1318 | |
| 1319 | for (cnt = left = 0; cnt < iovcnt; ++cnt) |
| 1320 | left += iov[cnt].iov_len; |
| 1321 | |
| 1322 | for (;;) { |
| 1323 | wret = writev(fd, iov, iovcnt); |
| 1324 | if (wret >= left) |
| 1325 | break; |
| 1326 | if (wret >= 0) { |
| 1327 | left -= wret; |
| 1328 | if (iov != localiov) { |
| 1329 | bcopy(iov, localiov, |
| 1330 | iovcnt * sizeof(struct iovec)); |
| 1331 | iov = localiov; |
| 1332 | } |
| 1333 | for (cnt = 0; wret >= iov->iov_len; ++cnt) { |
| 1334 | wret -= iov->iov_len; |
| 1335 | ++iov; |
| 1336 | --iovcnt; |
| 1337 | } |
| 1338 | if (wret) { |
| 1339 | iov->iov_base += wret; |
| 1340 | iov->iov_len -= wret; |
| 1341 | } |
| 1342 | continue; |
| 1343 | } |
| 1344 | if (errno == EWOULDBLOCK) { |
| 1345 | int cpid, off = 0; |
| 1346 | |
| 1347 | if (forked) { |
| 1348 | (void) close(fd); |
| 1349 | _exit(1); |
| 1350 | } |
| 1351 | cpid = fork(); |
| 1352 | if (cpid < 0) { |
| 1353 | (void) sprintf(errbuf, |
| 1354 | "fork: error %d", errno); |
| 1355 | (void) close(fd); |
| 1356 | return (errbuf); |
| 1357 | } |
| 1358 | if (cpid) { /* parent */ |
| 1359 | (void) close(fd); |
| 1360 | return (NULL); |
| 1361 | } |
| 1362 | forked++; |
| 1363 | /* wait at most 5 minutes */ |
| 1364 | (void) signal(SIGALRM, SIG_DFL); |
| 1365 | (void) signal(SIGTERM, SIG_DFL); /* XXX */ |
| 1366 | (void) sigsetmask(0); |
| 1367 | (void) alarm((u_int)(60 * 5)); |
| 1368 | (void) fcntl(fd, FNDELAY, &off); |
| 1369 | continue; |
| 1370 | } |
| 1371 | /* |
| 1372 | * We get ENODEV on a slip line if we're running as root, |
| 1373 | * and EIO if the line just went away. |
| 1374 | */ |
| 1375 | if (errno == ENODEV || errno == EIO) |
| 1376 | break; |
| 1377 | (void) close(fd); |
| 1378 | if (forked) |
| 1379 | _exit(1); |
| 1380 | (void) sprintf(errbuf, "%s: error %d", errno); |
| 1381 | return (errbuf); |
| 1382 | } |
| 1383 | |
| 1384 | (void) close(fd); |
| 1385 | if (forked) |
| 1386 | _exit(0); |
| 1387 | return (NULL); |
| 1388 | } |