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 3.28 09/06/81"; 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", H_ACHECK, 0, /* internal */ 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 # endif V6 223 /* 224 ** TTYPATH -- Get the path of the user's tty 225 ** 226 ** Returns the pathname of the user's tty. Returns NULL if 227 ** the user is not logged in or if s/he has write permission 228 ** denied. 229 ** 230 ** Parameters: 231 ** none 232 ** 233 ** Returns: 234 ** pathname of the user's tty. 235 ** NULL if not logged in or write permission denied. 236 ** 237 ** Side Effects: 238 ** none. 239 ** 240 ** WARNING: 241 ** Return value is in a local buffer. 242 ** 243 ** Called By: 244 ** savemail 245 */ 246 247 # include <sys/stat.h> 248 249 char * 250 ttypath() 251 { 252 struct stat stbuf; 253 register char *pathn; 254 extern char *ttyname(); 255 extern char *getlogin(); 256 257 /* compute the pathname of the controlling tty */ 258 if ((pathn = ttyname(2)) == NULL && (pathn = ttyname(1)) == NULL && (pathn = ttyname(0)) == NULL) 259 { 260 errno = 0; 261 return (NULL); 262 } 263 264 /* see if we have write permission */ 265 if (stat(pathn, &stbuf) < 0 || !bitset(02, stbuf.st_mode)) 266 { 267 errno = 0; 268 return (NULL); 269 } 270 271 /* see if the user is logged in */ 272 if (getlogin() == NULL) 273 return (NULL); 274 275 /* looks good */ 276 return (pathn); 277 } 278 /* 279 ** CHECKCOMPAT -- check for From and To person compatible. 280 ** 281 ** This routine can be supplied on a per-installation basis 282 ** to determine whether a person is allowed to send a message. 283 ** This allows restriction of certain types of internet 284 ** forwarding or registration of users. 285 ** 286 ** If the hosts are found to be incompatible, an error 287 ** message should be given using "usrerr" and FALSE should 288 ** be returned. 289 ** 290 ** 'NoReturn' can be set to suppress the return-to-sender 291 ** function; this should be done on huge messages. 292 ** 293 ** Parameters: 294 ** to -- the person being sent to. 295 ** 296 ** Returns: 297 ** TRUE -- ok to send. 298 ** FALSE -- not ok. 299 ** 300 ** Side Effects: 301 ** none (unless you include the usrerr stuff) 302 */ 303 304 bool 305 checkcompat(to) 306 register ADDRESS *to; 307 { 308 if (to->q_mailer != MN_LOCAL && MsgSize > 100000) 309 { 310 usrerr("Message exceeds 100000 bytes"); 311 NoReturn++; 312 return (FALSE); 313 } 314 return (TRUE); 315 } 316