1 # include <pwd.h> 2 # include "sendmail.h" 3 4 /* 5 ** CONF.C -- Sendmail Configuration Tables. 6 ** 7 ** Defines the configuration of this installation. 8 ** 9 ** Compilation Flags: 10 ** V6 -- running on a version 6 system. This determines 11 ** whether to define certain routines between 12 ** the two systems. If you are running a funny 13 ** system, e.g., V6 with long tty names, this 14 ** should be checked carefully. 15 ** 16 ** Configuration Variables: 17 ** HdrInfo -- a table describing well-known header fields. 18 ** Each entry has the field name and some flags, 19 ** which are described in sendmail.h. 20 ** StdTimezone -- name of local timezone in standard time 21 ** (V6 only). 22 ** DstTimezone -- name of local timezone in daylight savings 23 ** time (V6 only). 24 ** 25 ** Notes: 26 ** I have tried to put almost all the reasonable 27 ** configuration information into the configuration 28 ** file read at runtime. My intent is that anything 29 ** here is a function of the version of UNIX you 30 ** are running, or is really static -- for example 31 ** the headers are a superset of widely used 32 ** protocols. If you find yourself playing with 33 ** this file too much, you may be making a mistake! 34 */ 35 36 37 38 39 static char SccsId[] = "@(#)conf.c 3.30 09/12/81"; 40 41 42 # include <whoami.h> /* definitions of machine id's at berkeley */ 43 44 45 /* 46 ** Header info table 47 ** Final (null) entry contains the flags used for any other field. 48 ** 49 ** Not all of these are actually handled specially by sendmail 50 ** at this time. They are included as placeholders, to let 51 ** you know that "someday" I intend to have sendmail do 52 ** something with them. 53 */ 54 55 struct hdrinfo HdrInfo[] = 56 { 57 "date", H_CHECK, M_NEEDDATE, 58 "from", H_CHECK, M_NEEDFROM, 59 "original-from", 0, 0, 60 "sender", 0, 0, 61 "full-name", H_ACHECK, M_FULLNAME, 62 "to", H_ADDR, 0, 63 "cc", H_ADDR, 0, 64 "bcc", H_ADDR|H_ACHECK, 0, 65 "message-id", H_CHECK, M_MSGID, 66 "message", H_EOH, 0, 67 "text", H_EOH, 0, 68 "posted-date", 0, 0, 69 "return-receipt-to", 0, 0, 70 "received-date", H_CHECK, M_LOCAL, 71 "received-from", H_CHECK, M_LOCAL, 72 "precedence", 0, 0, 73 "via", H_FORCE, 0, 74 NULL, 0, 0, 75 }; 76 77 78 /* 79 ** ARPANET error message numbers. 80 */ 81 82 # ifdef NEWFTP 83 /* these are almost all unchecked */ 84 char Arpa_Info[] = "010"; /* arbitrary info: this is WRONG! */ 85 char Arpa_Enter[] = "354"; /* start mail input */ 86 char Arpa_Mmsg[] = "250"; /* mail successful (MAIL cmd) */ 87 char Arpa_Fmsg[] = "250"; /* mail successful (MLFL cmd) */ 88 char Arpa_Syserr[] = "450"; /* some (transient) system error */ 89 char Arpa_Usrerr[] = "550"; /* some (fatal) user error */ 90 # else NEWFTP 91 char Arpa_Info[] = "050"; /* arbitrary info */ 92 char Arpa_Enter[] = "350"; /* start mail input */ 93 char Arpa_Mmsg[] = "256"; /* mail successful (MAIL cmd) */ 94 char Arpa_Fmsg[] = "250"; /* mail successful (MLFL cmd) */ 95 char Arpa_Syserr[] = "455"; /* some (transient) system error */ 96 char Arpa_Usrerr[] = "450"; /* some (fatal) user error */ 97 # endif NEWFTP 98 99 100 101 102 103 /* 104 ** Location of system files/databases/etc. 105 */ 106 107 char *AliasFile = "/usr/lib/aliases"; /* alias file */ 108 char *ConfFile = "/usr/lib/sendmail.cf"; /* runtime configuration */ 109 char *StatFile = "/usr/eric/mailstats"; /* statistics summary */ 110 111 112 113 /* 114 ** V6 system configuration. 115 */ 116 117 # ifdef V6 118 char *StdTimezone = "PST"; /* std time timezone */ 119 char *DstTimezone = "PDT"; /* daylight time timezone */ 120 # endif V6 121 122 # ifdef V6 123 /* 124 ** TTYNAME -- return name of terminal. 125 ** 126 ** Parameters: 127 ** fd -- file descriptor to check. 128 ** 129 ** Returns: 130 ** pointer to full path of tty. 131 ** NULL if no tty. 132 ** 133 ** Side Effects: 134 ** none. 135 */ 136 137 char * 138 ttyname(fd) 139 int fd; 140 { 141 register char tn; 142 static char pathn[] = "/dev/ttyx"; 143 144 /* compute the pathname of the controlling tty */ 145 if ((tn = ttyn(fd)) == NULL) 146 { 147 errno = 0; 148 return (NULL); 149 } 150 pathn[8] = tn; 151 return (pathn); 152 } 153 /* 154 ** FDOPEN -- Open a stdio file given an open file descriptor. 155 ** 156 ** This is included here because it is standard in v7, but we 157 ** need it in v6. 158 ** 159 ** Algorithm: 160 ** Open /dev/null to create a descriptor. 161 ** Close that descriptor. 162 ** Copy the existing fd into the descriptor. 163 ** 164 ** Parameters: 165 ** fd -- the open file descriptor. 166 ** type -- "r", "w", or whatever. 167 ** 168 ** Returns: 169 ** The file descriptor it creates. 170 ** 171 ** Side Effects: 172 ** none 173 ** 174 ** Called By: 175 ** deliver 176 ** 177 ** Notes: 178 ** The mode of fd must match "type". 179 */ 180 181 FILE * 182 fdopen(fd, type) 183 int fd; 184 char *type; 185 { 186 register FILE *f; 187 188 f = fopen("/dev/null", type); 189 (void) close(fileno(f)); 190 fileno(f) = fd; 191 return (f); 192 } 193 /* 194 ** INDEX -- Return pointer to character in string 195 ** 196 ** For V7 compatibility. 197 ** 198 ** Parameters: 199 ** s -- a string to scan. 200 ** c -- a character to look for. 201 ** 202 ** Returns: 203 ** If c is in s, returns the address of the first 204 ** instance of c in s. 205 ** NULL if c is not in s. 206 ** 207 ** Side Effects: 208 ** none. 209 */ 210 211 index(s, c) 212 register char *s; 213 register char c; 214 { 215 while (*s != '\0') 216 { 217 if (*s++ == c) 218 return (--s); 219 } 220 return (NULL); 221 } 222 /* 223 ** UMASK -- fake the umask system call. 224 ** 225 ** Since V6 always acts like the umask is zero, we will just 226 ** assume the same thing. 227 */ 228 229 /*ARGSUSED*/ 230 umask(nmask) 231 { 232 return (0); 233 } 234 235 236 /* 237 ** GETRUID -- get real user id. 238 */ 239 240 getruid() 241 { 242 return (getuid() & 0377); 243 } 244 245 246 /* 247 ** GETRGID -- get real group id. 248 */ 249 250 getrgid() 251 { 252 return (getgid() & 0377); 253 } 254 255 256 /* 257 ** GETEUID -- get effective user id. 258 */ 259 260 geteuid() 261 { 262 return ((getuid() >> 8) & 0377); 263 } 264 265 266 /* 267 ** GETEGID -- get effective group id. 268 */ 269 270 getegid() 271 { 272 return ((getgid() >> 8) & 0377); 273 } 274 275 # endif V6 276 277 # ifndef V6 278 279 /* 280 ** GETRUID -- get real user id (V7) 281 */ 282 283 getruid() 284 { 285 return (getuid()); 286 } 287 288 289 /* 290 ** GETRGID -- get real group id (V7). 291 */ 292 293 getrgid() 294 { 295 return (getgid()); 296 } 297 298 # endif V6 299 /* 300 ** TTYPATH -- Get the path of the user's tty 301 ** 302 ** Returns the pathname of the user's tty. Returns NULL if 303 ** the user is not logged in or if s/he has write permission 304 ** denied. 305 ** 306 ** Parameters: 307 ** none 308 ** 309 ** Returns: 310 ** pathname of the user's tty. 311 ** NULL if not logged in or write permission denied. 312 ** 313 ** Side Effects: 314 ** none. 315 ** 316 ** WARNING: 317 ** Return value is in a local buffer. 318 ** 319 ** Called By: 320 ** savemail 321 */ 322 323 # include <sys/stat.h> 324 325 char * 326 ttypath() 327 { 328 struct stat stbuf; 329 register char *pathn; 330 extern char *ttyname(); 331 extern char *getlogin(); 332 333 /* compute the pathname of the controlling tty */ 334 if ((pathn = ttyname(2)) == NULL && (pathn = ttyname(1)) == NULL && (pathn = ttyname(0)) == NULL) 335 { 336 errno = 0; 337 return (NULL); 338 } 339 340 /* see if we have write permission */ 341 if (stat(pathn, &stbuf) < 0 || !bitset(02, stbuf.st_mode)) 342 { 343 errno = 0; 344 return (NULL); 345 } 346 347 /* see if the user is logged in */ 348 if (getlogin() == NULL) 349 return (NULL); 350 351 /* looks good */ 352 return (pathn); 353 } 354 /* 355 ** CHECKCOMPAT -- check for From and To person compatible. 356 ** 357 ** This routine can be supplied on a per-installation basis 358 ** to determine whether a person is allowed to send a message. 359 ** This allows restriction of certain types of internet 360 ** forwarding or registration of users. 361 ** 362 ** If the hosts are found to be incompatible, an error 363 ** message should be given using "usrerr" and FALSE should 364 ** be returned. 365 ** 366 ** 'NoReturn' can be set to suppress the return-to-sender 367 ** function; this should be done on huge messages. 368 ** 369 ** Parameters: 370 ** to -- the person being sent to. 371 ** 372 ** Returns: 373 ** TRUE -- ok to send. 374 ** FALSE -- not ok. 375 ** 376 ** Side Effects: 377 ** none (unless you include the usrerr stuff) 378 */ 379 380 bool 381 checkcompat(to) 382 register ADDRESS *to; 383 { 384 if (to->q_mailer != MN_LOCAL && MsgSize > 100000) 385 { 386 usrerr("Message exceeds 100000 bytes"); 387 NoReturn++; 388 return (FALSE); 389 } 390 return (TRUE); 391 } 392