# 2.11BSD#431 - /usr/src/usr.sbin/sendmail/src/conf.c

##### Functions

    checkcompat       X
    getla             X
    getrgid           X
    getruid           X
    reapchild         X
    setdefaults       X
    setproctitle      X
    shouldqueue       X
    ttypath           X
    username          X

##### Variables

    Arpa_Info         X
    Arpa_PSyserr      X
    Arpa_TSyserr      X
    Arpa_Usrerr       X
    ConfFile          X
    DtableSize        X
    FreezeFile        X
    HdrInfo           X
    bool              X

       1: /*
       2: **  Sendmail
       3: **  Copyright (c) 1983  Eric P. Allman
       4: **  Berkeley, California
       5: **
       6: **  Copyright (c) 1983 Regents of the University of California.
       7: **  All rights reserved.  The Berkeley software License Agreement
       8: **  specifies the terms and conditions for redistribution.
       9: */
      10:
      11: #if !defined(lint) && !defined(NOSCCS)
      12: static char SccsId[] = "@(#)conf.c	5.14.6 (2.11BSD GTE) 1997/10/2";
      13: #endif
      14:
      15: #include <pwd.h>
      16: #include <sys/ioctl.h>
      17: #include "sendmail.h"
      18:
      19: /*
      20: **  CONF.C -- Sendmail Configuration Tables.
      21: **
      22: **	Defines the configuration of this installation.
      23: **
      24: **	Compilation Flags:
      25: **		VMUNIX -- running on a Berkeley UNIX system.
      26: **
      27: **	Configuration Variables:
      28: **		HdrInfo -- a table describing well-known header fields.
      29: **			Each entry has the field name and some flags,
      30: **			which are described in sendmail.h.
      31: **
      32: **	Notes:
      33: **		I have tried to put almost all the reasonable
      34: **		configuration information into the configuration
      35: **		file read at runtime.  My intent is that anything
      36: **		here is a function of the version of UNIX you
      37: **		are running, or is really static -- for example
      38: **		the headers are a superset of widely used
      39: **		protocols.  If you find yourself playing with
      40: **		this file too much, you may be making a mistake!
      41: */
      42:
      43:
      44:
      45:
      46: /*
      47: **  Header info table
      48: **	Final (null) entry contains the flags used for any other field.
      49: **
      50: **	Not all of these are actually handled specially by sendmail
      51: **	at this time.  They are included as placeholders, to let
      52: **	you know that "someday" I intend to have sendmail do
      53: **	something with them.
      54: */
      55:
      56: struct hdrinfo  HdrInfo[] =
      57: {
      58:         /* originator fields, most to least significant  */
      59:     "resent-sender",    H_FROM|H_RESENT,
      60:     "resent-from",      H_FROM|H_RESENT,
      61:     "resent-reply-to",  H_FROM|H_RESENT,
      62:     "sender",       H_FROM,
      63:     "from",         H_FROM,
      64:     "reply-to",     H_FROM,
      65:     "full-name",        H_ACHECK,
      66:     "return-receipt-to",    H_FROM,
      67:     "errors-to",        H_FROM,
      68:         /* destination fields */
      69:     "to",           H_RCPT,
      70:     "resent-to",        H_RCPT|H_RESENT,
      71:     "cc",           H_RCPT,
      72:     "resent-cc",        H_RCPT|H_RESENT,
      73:     "bcc",          H_RCPT|H_ACHECK,
      74:     "resent-bcc",       H_RCPT|H_ACHECK|H_RESENT,
      75:         /* message identification and control */
      76:     "message-id",       0,
      77:     "resent-message-id",    H_RESENT,
      78:     "message",      H_EOH,
      79:     "text",         H_EOH,
      80:         /* date fields */
      81:     "date",         0,
      82:     "resent-date",      H_RESENT,
      83:         /* trace fields */
      84:     "received",     H_TRACE|H_FORCE,
      85:     "via",          H_TRACE|H_FORCE,
      86:     "mail-from",        H_TRACE|H_FORCE,
      87:
      88:     NULL,           0,
      89: };
      90:
      91:
      92: /*
      93: **  ARPANET error message numbers.
      94: */
      95:
      96: char    *Arpa_Info =        "050";  /* arbitrary info */
      97: char    *Arpa_TSyserr =     "451";  /* some (transient) system error */
      98: char    *Arpa_PSyserr =     "554";  /* some (permanent) system error */
      99: char    *Arpa_Usrerr =      "554";  /* some (fatal) user error */
     100:
     101:
     102:
     103: /*
     104: **  Location of system files/databases/etc.
     105: */
     106:
     107: char    *ConfFile = "/etc/sendmail.cf"; /* runtime configuration */
     108: char    *FreezeFile =   "/etc/sendmail.fc"; /* frozen version of above */
     109:
     110:
     111:
     112: /*
     113: **  Miscellaneous stuff.
     114: */
     115:
     116: int DtableSize =    50;     /* max open files; reset in 4.2bsd */
     117: /*
     118: **  SETDEFAULTS -- set default values
     119: **
     120: **	Because of the way freezing is done, these must be initialized
     121: **	using direct code.
     122: **
     123: **	Parameters:
     124: **		none.
     125: **
     126: **	Returns:
     127: **		none.
     128: **
     129: **	Side Effects:
     130: **		Initializes a bunch of global variables to their
     131: **		default values.
     132: */
     133:
     134: setdefaults()
     135: {
     136:     QueueLA = 8;
     137:     QueueFactor = 10000;
     138:     RefuseLA = 12;
     139:     SpaceSub = ' ';
     140:     WkRecipFact = 1000;
     141:     WkClassFact = 1800;
     142:     WkTimeFact = 9000;
     143:     FileMode = 0644;
     144:     DefUid = 1;
     145:     DefGid = 1;
     146: }
     147:
     148: /*
     149: **  GETRUID -- get real user id (V7)
     150: */
     151:
     152: getruid()
     153: {
     154:     if (OpMode == MD_DAEMON)
     155:         return (RealUid);
     156:     else
     157:         return (getuid());
     158: }
     159:
     160:
     161: /*
     162: **  GETRGID -- get real group id (V7).
     163: */
     164:
     165: getrgid()
     166: {
     167:     if (OpMode == MD_DAEMON)
     168:         return (RealGid);
     169:     else
     170:         return (getgid());
     171: }
     172:
     173: /*
     174: **  USERNAME -- return the user id of the logged in user.
     175: **
     176: **	Parameters:
     177: **		none.
     178: **
     179: **	Returns:
     180: **		The login name of the logged in user.
     181: **
     182: **	Side Effects:
     183: **		none.
     184: **
     185: **	Notes:
     186: **		The return value is statically allocated.
     187: */
     188:
     189: char *
     190: username()
     191: {
     192:     static char *myname = NULL;
     193:     register struct passwd *pw;
     194:
     195:     /* cache the result */
     196:     if (myname == NULL)
     197:     {
     198:         myname = getlogin();
     199:         if (myname == NULL || myname[0] == '\0')
     200:         {
     201:
     202:             pw = getpwuid(getruid());
     203:             if (pw != NULL)
     204:                 myname = newstr(pw->pw_name);
     205:         }
     206:         else
     207:         {
     208:
     209:             pw = getpwnam(myname);
     210:             if(getuid() != pw->pw_uid)
     211:             {
     212:                 pw = getpwuid(getuid());
     213:                 if (pw != NULL)
     214:                     myname = newstr(pw->pw_name);
     215:             }
     216:         }
     217:         if (myname == NULL || myname[0] == '\0')
     218:         {
     219:             syserr("Who are you?");
     220:             myname = "postmaster";
     221:         }
     222:     }
     223:
     224:     return (myname);
     225: }
     226: /*
     227: **  TTYPATH -- Get the path of the user's tty
     228: **
     229: **	Returns the pathname of the user's tty.  Returns NULL if
     230: **	the user is not logged in or if s/he has write permission
     231: **	denied.
     232: **
     233: **	Parameters:
     234: **		none
     235: **
     236: **	Returns:
     237: **		pathname of the user's tty.
     238: **		NULL if not logged in or write permission denied.
     239: **
     240: **	Side Effects:
     241: **		none.
     242: **
     243: **	WARNING:
     244: **		Return value is in a local buffer.
     245: **
     246: **	Called By:
     247: **		savemail
     248: */
     249:
     250: # include <sys/stat.h>
     251:
     252: char *
     253: ttypath()
     254: {
     255:     struct stat stbuf;
     256:     register char *pathn;
     257:
     258:     /* compute the pathname of the controlling tty */
     259:     if ((pathn = ttyname(2)) == NULL && (pathn = ttyname(1)) == NULL &&
     260:         (pathn = ttyname(0)) == NULL)
     261:     {
     262:         errno = 0;
     263:         return (NULL);
     264:     }
     265:
     266:     /* see if we have write permission */
     267:     if (stat(pathn, &stbuf) < 0 || !bitset(02, stbuf.st_mode))
     268:     {
     269:         errno = 0;
     270:         return (NULL);
     271:     }
     272:
     273:     /* see if the user is logged in */
     274:     if (getlogin() == NULL)
     275:         return (NULL);
     276:
     277:     /* looks good */
     278:     return (pathn);
     279: }
     280: /*
     281: **  CHECKCOMPAT -- check for From and To person compatible.
     282: **
     283: **	This routine can be supplied on a per-installation basis
     284: **	to determine whether a person is allowed to send a message.
     285: **	This allows restriction of certain types of internet
     286: **	forwarding or registration of users.
     287: **
     288: **	If the hosts are found to be incompatible, an error
     289: **	message should be given using "usrerr" and FALSE should
     290: **	be returned.
     291: **
     292: **	'NoReturn' can be set to suppress the return-to-sender
     293: **	function; this should be done on huge messages.
     294: **
     295: **	Parameters:
     296: **		to -- the person being sent to.
     297: **
     298: **	Returns:
     299: **		TRUE -- ok to send.
     300: **		FALSE -- not ok.
     301: **
     302: **	Side Effects:
     303: **		none (unless you include the usrerr stuff)
     304: */
     305:
     306: bool
     307: checkcompat(to)
     308:     register ADDRESS *to;
     309: {
     310: # ifdef lint
     311:     if (to == NULL)
     312:         to++;
     313: # endif lint
     314: # ifdef EXAMPLE_CODE
     315:     /* this code is intended as an example only */
     316:     register STAB *s;
     317:
     318:     s = stab("arpa", ST_MAILER, ST_FIND);
     319:     if (s != NULL && CurEnv->e_from.q_mailer != LocalMailer &&
     320:         to->q_mailer == s->s_mailer)
     321:     {
     322:         usrerr("No ARPA mail through this machine: see your system administration");
     323:         /* NoReturn = TRUE; to supress return copy */
     324:         return (FALSE);
     325:     }
     326: # endif EXAMPLE_CODE
     327:     return (TRUE);
     328: }
     329: /*
     330: **  GETLA -- get the current load average
     331: **
     332: **	This code stolen from la.c.
     333: **
     334: **	Parameters:
     335: **		none.
     336: **
     337: **	Returns:
     338: **		The current load average as an integer.
     339: **
     340: **	Side Effects:
     341: **		none.
     342: */
     343:
     344: getla()
     345: {
     346:     double avenrun;
     347:
     348:     getloadavg(&avenrun, 1);
     349:     return(avenrun);
     350: }
     351: /*
     352: **  SHOULDQUEUE -- should this message be queued or sent?
     353: **
     354: **	Compares the message cost to the load average to decide.
     355: **
     356: **	Parameters:
     357: **		pri -- the priority of the message in question.
     358: **
     359: **	Returns:
     360: **		TRUE -- if this message should be queued up for the
     361: **			time being.
     362: **		FALSE -- if the load is low enough to send this message.
     363: **
     364: **	Side Effects:
     365: **		none.
     366: */
     367:
     368: bool
     369: shouldqueue(pri)
     370:     long pri;
     371: {
     372:     int la;
     373:
     374:     la = getla();
     375:     if (la < QueueLA)
     376:         return (FALSE);
     377:     return (pri > (QueueFactor / (la - QueueLA + 1)));
     378: }
     379: /*
     380: **  SETPROCTITLE -- set process title for ps
     381: **
     382: **	Parameters:
     383: **		fmt -- a printf style format string.
     384: **		a, b, c -- possible parameters to fmt.
     385: **
     386: **	Returns:
     387: **		none.
     388: **
     389: **	Side Effects:
     390: **		Clobbers argv of our main procedure so ps(1) will
     391: **		display the title.
     392: */
     393:
     394: /*VARARGS1*/
     395: setproctitle(fmt, a, b, c)
     396:     char *fmt;
     397: {
     398: # ifdef SETPROCTITLE
     399:     register char *p;
     400:     register int i;
     401:     extern char **Argv;
     402:     extern char *LastArgv;
     403:     char buf[MAXLINE];
     404:
     405:     (void) sprintf(buf, fmt, a, b, c);
     406:
     407:     /* make ps print "(sendmail)" */
     408:     p = Argv[0];
     409:     *p++ = '-';
     410:
     411:     i = strlen(buf);
     412:     if (i > LastArgv - p - 2)
     413:     {
     414:         i = LastArgv - p - 2;
     415:         buf[i] = '\0';
     416:     }
     417:     (void) strcpy(p, buf);
     418:     p += i;
     419:     while (p < LastArgv)
     420:         *p++ = ' ';
     421: # endif SETPROCTITLE
     422: }
     423: /*
     424: **  REAPCHILD -- pick up the body of my child, lest it become a zombie
     425: **
     426: **	Parameters:
     427: **		none.
     428: **
     429: **	Returns:
     430: **		none.
     431: **
     432: **	Side Effects:
     433: **		Picks up extant zombies.
     434: */
     435:
     436: # ifdef VMUNIX
     437: # include <sys/wait.h>
     438: # endif VMUNIX
     439:
     440: reapchild()
     441: {
     442: # ifdef WNOHANG
     443:     union wait status;
     444:
     445:     while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0)
     446:         continue;
     447: # else WNOHANG
     448:     auto int status;
     449:
     450:     while (wait(&status) > 0)
     451:         continue;
     452: # endif WNOHANG
     453: }

#### Defined functions

checkcompat defined in line 306; used 2 times

- in /usr/src/usr.sbin/sendmail/src/deliver.c line 62, 236

getla defined in line 344; used 2 times

- in line 374
- in /usr/src/usr.sbin/sendmail/src/daemon.c line 164

getrgid defined in line 165; used 2 times

- in /usr/src/usr.sbin/sendmail/src/main.c line 176
- in /usr/src/usr.sbin/sendmail/src/recipient.c line 434

getruid defined in line 152; used 6 times

- in line 202
- in /usr/src/usr.sbin/sendmail/src/main.c line 177
- in /usr/src/usr.sbin/sendmail/src/readcf.c line 685, 693
- in /usr/src/usr.sbin/sendmail/src/recipient.c line 300, 433

reapchild defined in line 440; used 4 times

- in /usr/src/usr.sbin/sendmail/src/daemon.c line 88, 149
- in /usr/src/usr.sbin/sendmail/src/queue.c line 288, 294

setdefaults defined in line 134; used 1 times

- in /usr/src/usr.sbin/sendmail/src/main.c line 148

setproctitle defined in line 395; used 7 times

- in /usr/src/usr.sbin/sendmail/src/queue.c line 309
- in /usr/src/usr.sbin/sendmail/src/srvrsmtp.c line 129, 195, 239, 258, 304, 370

shouldqueue defined in line 368; used 9 times

- in /usr/src/usr.sbin/sendmail/src/deliver.c line 1291
- in /usr/src/usr.sbin/sendmail/src/queue.c line 260, 267, 460, 548, 559, 813, 827
- in /usr/src/usr.sbin/sendmail/src/sendmail.h line 585

ttypath defined in line 252; used 2 times

- in /usr/src/usr.sbin/sendmail/src/savemail.c line 59, 162

username defined in line 189; used 5 times

- in /usr/src/usr.sbin/sendmail/src/alias.c line 276-279(2)
- in /usr/src/usr.sbin/sendmail/src/envelope.c line 437-439(2)
- in /usr/src/usr.sbin/sendmail/src/readcf.c line 660

#### Defined variables

Arpa_Info defined in line 96; used 3 times

- in /usr/src/usr.sbin/sendmail/src/usersmtp.c line 303, 439, 489

Arpa_PSyserr defined in line 98; never used
Arpa_TSyserr defined in line 97; used 2 times

- in /usr/src/usr.sbin/sendmail/src/usersmtp.c line 401, 411

Arpa_Usrerr defined in line 99; never used
ConfFile defined in line 107; never used
DtableSize defined in line 116; never used
FreezeFile defined in line 108; never used
HdrInfo defined in line 56; never used
SccsId defined in line 12; never used
bool defined in line 306; used 1 times

- in line 368

Last modified: 1997-10-03 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 1849 |