1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)err.c 8.7 (Berkeley) 08/06/93"; 11 #endif /* not lint */ 12 13 # include "sendmail.h" 14 # include <errno.h> 15 # include <netdb.h> 16 17 /* 18 ** SYSERR -- Print error message. 19 ** 20 ** Prints an error message via printf to the diagnostic 21 ** output. If LOG is defined, it logs it also. 22 ** 23 ** If the first character of the syserr message is `!' it will 24 ** log this as an ALERT message and exit immediately. This can 25 ** leave queue files in an indeterminate state, so it should not 26 ** be used lightly. 27 ** 28 ** Parameters: 29 ** f -- the format string 30 ** a, b, c, d, e -- parameters 31 ** 32 ** Returns: 33 ** none 34 ** Through TopFrame if QuickAbort is set. 35 ** 36 ** Side Effects: 37 ** increments Errors. 38 ** sets ExitStat. 39 */ 40 41 char MsgBuf[BUFSIZ*2]; /* text of most recent message */ 42 43 static void fmtmsg(); 44 45 #if defined(NAMED_BIND) && !defined(NO_DATA) 46 # define NO_DATA NO_ADDRESS 47 #endif 48 49 void 50 /*VARARGS1*/ 51 #ifdef __STDC__ 52 syserr(const char *fmt, ...) 53 #else 54 syserr(fmt, va_alist) 55 const char *fmt; 56 va_dcl 57 #endif 58 { 59 register char *p; 60 int olderrno = errno; 61 bool panic; 62 VA_LOCAL_DECL 63 64 panic = *fmt == '!'; 65 if (panic) 66 fmt++; 67 68 /* format and output the error message */ 69 if (olderrno == 0) 70 p = "554"; 71 else 72 p = "451"; 73 VA_START(fmt); 74 fmtmsg(MsgBuf, (char *) NULL, p, olderrno, fmt, ap); 75 VA_END; 76 puterrmsg(MsgBuf); 77 78 /* determine exit status if not already set */ 79 if (ExitStat == EX_OK) 80 { 81 if (olderrno == 0) 82 ExitStat = EX_SOFTWARE; 83 else 84 ExitStat = EX_OSERR; 85 } 86 87 # ifdef LOG 88 if (LogLevel > 0) 89 syslog(panic ? LOG_ALERT : LOG_CRIT, "%s: SYSERR: %s", 90 CurEnv->e_id == NULL ? "NOQUEUE" : CurEnv->e_id, 91 &MsgBuf[4]); 92 # endif /* LOG */ 93 if (panic) 94 { 95 #ifdef XLA 96 xla_all_end(); 97 #endif 98 exit(EX_OSERR); 99 } 100 errno = 0; 101 if (QuickAbort) 102 longjmp(TopFrame, 2); 103 } 104 /* 105 ** USRERR -- Signal user error. 106 ** 107 ** This is much like syserr except it is for user errors. 108 ** 109 ** Parameters: 110 ** fmt, a, b, c, d -- printf strings 111 ** 112 ** Returns: 113 ** none 114 ** Through TopFrame if QuickAbort is set. 115 ** 116 ** Side Effects: 117 ** increments Errors. 118 */ 119 120 /*VARARGS1*/ 121 void 122 #ifdef __STDC__ 123 usrerr(const char *fmt, ...) 124 #else 125 usrerr(fmt, va_alist) 126 const char *fmt; 127 va_dcl 128 #endif 129 { 130 VA_LOCAL_DECL 131 extern char SuprErrs; 132 extern int errno; 133 134 if (SuprErrs) 135 return; 136 137 VA_START(fmt); 138 fmtmsg(MsgBuf, CurEnv->e_to, "501", 0, fmt, ap); 139 VA_END; 140 puterrmsg(MsgBuf); 141 142 # ifdef LOG 143 if (LogLevel > 3 && LogUsrErrs) 144 syslog(LOG_NOTICE, "%s: %s", 145 CurEnv->e_id == NULL ? "NOQUEUE" : CurEnv->e_id, 146 &MsgBuf[4]); 147 # endif /* LOG */ 148 149 if (QuickAbort) 150 longjmp(TopFrame, 1); 151 } 152 /* 153 ** MESSAGE -- print message (not necessarily an error) 154 ** 155 ** Parameters: 156 ** msg -- the message (printf fmt) -- it can begin with 157 ** an SMTP reply code. If not, 050 is assumed. 158 ** a, b, c, d, e -- printf arguments 159 ** 160 ** Returns: 161 ** none 162 ** 163 ** Side Effects: 164 ** none. 165 */ 166 167 /*VARARGS2*/ 168 void 169 #ifdef __STDC__ 170 message(const char *msg, ...) 171 #else 172 message(msg, va_alist) 173 const char *msg; 174 va_dcl 175 #endif 176 { 177 VA_LOCAL_DECL 178 179 errno = 0; 180 VA_START(msg); 181 fmtmsg(MsgBuf, CurEnv->e_to, "050", 0, msg, ap); 182 VA_END; 183 putoutmsg(MsgBuf, FALSE); 184 } 185 /* 186 ** NMESSAGE -- print message (not necessarily an error) 187 ** 188 ** Just like "message" except it never puts the to... tag on. 189 ** 190 ** Parameters: 191 ** num -- the default ARPANET error number (in ascii) 192 ** msg -- the message (printf fmt) -- if it begins 193 ** with three digits, this number overrides num. 194 ** a, b, c, d, e -- printf arguments 195 ** 196 ** Returns: 197 ** none 198 ** 199 ** Side Effects: 200 ** none. 201 */ 202 203 /*VARARGS2*/ 204 void 205 #ifdef __STDC__ 206 nmessage(const char *msg, ...) 207 #else 208 nmessage(msg, va_alist) 209 const char *msg; 210 va_dcl 211 #endif 212 { 213 VA_LOCAL_DECL 214 215 errno = 0; 216 VA_START(msg); 217 fmtmsg(MsgBuf, (char *) NULL, "050", 0, msg, ap); 218 VA_END; 219 putoutmsg(MsgBuf, FALSE); 220 } 221 /* 222 ** PUTOUTMSG -- output error message to transcript and channel 223 ** 224 ** Parameters: 225 ** msg -- message to output (in SMTP format). 226 ** holdmsg -- if TRUE, don't output a copy of the message to 227 ** our output channel. 228 ** 229 ** Returns: 230 ** none. 231 ** 232 ** Side Effects: 233 ** Outputs msg to the transcript. 234 ** If appropriate, outputs it to the channel. 235 ** Deletes SMTP reply code number as appropriate. 236 */ 237 238 putoutmsg(msg, holdmsg) 239 char *msg; 240 bool holdmsg; 241 { 242 /* output to transcript if serious */ 243 if (CurEnv->e_xfp != NULL && strchr("456", msg[0]) != NULL) 244 fprintf(CurEnv->e_xfp, "%s\n", msg); 245 246 /* output to channel if appropriate */ 247 if (holdmsg || (!Verbose && msg[0] == '0')) 248 return; 249 250 /* map warnings to something SMTP can handle */ 251 if (msg[0] == '6') 252 msg[0] = '5'; 253 254 (void) fflush(stdout); 255 if (OpMode == MD_SMTP) 256 fprintf(OutChannel, "%s\r\n", msg); 257 else 258 fprintf(OutChannel, "%s\n", &msg[4]); 259 if (TrafficLogFile != NULL) 260 fprintf(TrafficLogFile, "%05d >>> %s\n", getpid(), 261 OpMode == MD_SMTP ? msg : &msg[4]); 262 if (msg[3] == ' ') 263 (void) fflush(OutChannel); 264 if (!ferror(OutChannel)) 265 return; 266 267 /* error on output -- if reporting lost channel, just ignore it */ 268 if (feof(InChannel) || ferror(InChannel)) 269 return; 270 271 /* can't call syserr, 'cause we are using MsgBuf */ 272 HoldErrs = TRUE; 273 #ifdef LOG 274 if (LogLevel > 0) 275 syslog(LOG_CRIT, 276 "%s: SYSERR: putoutmsg (%s): error on output channel sending \"%s\"", 277 CurEnv->e_id == NULL ? "NOQUEUE" : CurEnv->e_id, 278 CurHostName == NULL ? "NO-HOST" : CurHostName, 279 msg); 280 #endif 281 } 282 /* 283 ** PUTERRMSG -- like putoutmsg, but does special processing for error messages 284 ** 285 ** Parameters: 286 ** msg -- the message to output. 287 ** 288 ** Returns: 289 ** none. 290 ** 291 ** Side Effects: 292 ** Sets the fatal error bit in the envelope as appropriate. 293 */ 294 295 puterrmsg(msg) 296 char *msg; 297 { 298 char msgcode = msg[0]; 299 300 /* output the message as usual */ 301 putoutmsg(msg, HoldErrs); 302 303 /* signal the error */ 304 if (msgcode == '6') 305 { 306 /* notify the postmaster */ 307 CurEnv->e_flags |= EF_PM_NOTIFY; 308 } 309 else 310 { 311 Errors++; 312 if (msgcode == '5' && bitset(EF_GLOBALERRS, CurEnv->e_flags)) 313 CurEnv->e_flags |= EF_FATALERRS; 314 } 315 } 316 /* 317 ** FMTMSG -- format a message into buffer. 318 ** 319 ** Parameters: 320 ** eb -- error buffer to get result. 321 ** to -- the recipient tag for this message. 322 ** num -- arpanet error number. 323 ** en -- the error number to display. 324 ** fmt -- format of string. 325 ** a, b, c, d, e -- arguments. 326 ** 327 ** Returns: 328 ** none. 329 ** 330 ** Side Effects: 331 ** none. 332 */ 333 334 static void 335 fmtmsg(eb, to, num, eno, fmt, ap) 336 register char *eb; 337 char *to; 338 char *num; 339 int eno; 340 char *fmt; 341 va_list ap; 342 { 343 char del; 344 char *meb; 345 346 /* output the reply code */ 347 if (isdigit(fmt[0]) && isdigit(fmt[1]) && isdigit(fmt[2])) 348 { 349 num = fmt; 350 fmt += 4; 351 } 352 if (num[3] == '-') 353 del = '-'; 354 else 355 del = ' '; 356 (void) sprintf(eb, "%3.3s%c", num, del); 357 eb += 4; 358 359 /* output the file name and line number */ 360 if (FileName != NULL) 361 { 362 (void) sprintf(eb, "%s: line %d: ", FileName, LineNumber); 363 eb += strlen(eb); 364 } 365 366 /* output the "to" person */ 367 if (to != NULL && to[0] != '\0') 368 { 369 (void) sprintf(eb, "%s... ", to); 370 while (*eb != '\0') 371 *eb++ &= 0177; 372 } 373 374 meb = eb; 375 376 /* output the message */ 377 (void) vsprintf(eb, fmt, ap); 378 while (*eb != '\0') 379 *eb++ &= 0177; 380 381 /* output the error code, if any */ 382 if (eno != 0) 383 { 384 (void) sprintf(eb, ": %s", errstring(eno)); 385 eb += strlen(eb); 386 } 387 388 if (CurEnv->e_message == NULL && strchr("45", num[0]) != NULL) 389 CurEnv->e_message = newstr(meb); 390 } 391 /* 392 ** ERRSTRING -- return string description of error code 393 ** 394 ** Parameters: 395 ** errno -- the error number to translate 396 ** 397 ** Returns: 398 ** A string description of errno. 399 ** 400 ** Side Effects: 401 ** none. 402 */ 403 404 const char * 405 errstring(errno) 406 int errno; 407 { 408 static char buf[MAXLINE]; 409 # ifndef ERRLIST_PREDEFINED 410 extern char *sys_errlist[]; 411 extern int sys_nerr; 412 # endif 413 # ifdef SMTP 414 extern char *SmtpPhase; 415 # endif /* SMTP */ 416 417 # ifdef DAEMON 418 # ifdef ETIMEDOUT 419 /* 420 ** Handle special network error codes. 421 ** 422 ** These are 4.2/4.3bsd specific; they should be in daemon.c. 423 */ 424 425 switch (errno) 426 { 427 case ETIMEDOUT: 428 case ECONNRESET: 429 (void) strcpy(buf, sys_errlist[errno]); 430 if (SmtpPhase != NULL) 431 { 432 (void) strcat(buf, " during "); 433 (void) strcat(buf, SmtpPhase); 434 } 435 if (CurHostName != NULL) 436 { 437 (void) strcat(buf, " with "); 438 (void) strcat(buf, CurHostName); 439 } 440 return (buf); 441 442 case EHOSTDOWN: 443 if (CurHostName == NULL) 444 break; 445 (void) sprintf(buf, "Host %s is down", CurHostName); 446 return (buf); 447 448 case ECONNREFUSED: 449 if (CurHostName == NULL) 450 break; 451 (void) sprintf(buf, "Connection refused by %s", CurHostName); 452 return (buf); 453 454 case EOPENTIMEOUT: 455 return "Timeout on file open"; 456 457 # ifdef NAMED_BIND 458 case HOST_NOT_FOUND + E_DNSBASE: 459 return ("Name server: host not found"); 460 461 case TRY_AGAIN + E_DNSBASE: 462 return ("Name server: host name lookup failure"); 463 464 case NO_RECOVERY + E_DNSBASE: 465 return ("Name server: non-recoverable error"); 466 467 case NO_DATA + E_DNSBASE: 468 return ("Name server: no data known for name"); 469 # endif 470 } 471 # endif 472 # endif 473 474 if (errno > 0 && errno < sys_nerr) 475 return (sys_errlist[errno]); 476 477 (void) sprintf(buf, "Error %d", errno); 478 return (buf); 479 } 480