4.4BSD/usr/src/usr.sbin/sendmail/src/envelope.c
/*
* Copyright (c) 1983 Eric P. Allman
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)envelope.c 8.1 (Berkeley) 6/7/93";
#endif /* not lint */
#include "sendmail.h"
#include <sys/time.h>
#include <pwd.h>
/*
** NEWENVELOPE -- allocate a new envelope
**
** Supports inheritance.
**
** Parameters:
** e -- the new envelope to fill in.
** parent -- the envelope to be the parent of e.
**
** Returns:
** e.
**
** Side Effects:
** none.
*/
ENVELOPE *
newenvelope(e, parent)
register ENVELOPE *e;
register ENVELOPE *parent;
{
extern putheader(), putbody();
extern ENVELOPE BlankEnvelope;
if (e == parent && e->e_parent != NULL)
parent = e->e_parent;
clearenvelope(e, TRUE);
if (e == CurEnv)
bcopy((char *) &NullAddress, (char *) &e->e_from, sizeof e->e_from);
else
bcopy((char *) &CurEnv->e_from, (char *) &e->e_from, sizeof e->e_from);
e->e_parent = parent;
e->e_ctime = curtime();
if (parent != NULL)
e->e_msgpriority = parent->e_msgsize;
e->e_puthdr = putheader;
e->e_putbody = putbody;
if (CurEnv->e_xfp != NULL)
(void) fflush(CurEnv->e_xfp);
return (e);
}
/*
** DROPENVELOPE -- deallocate an envelope.
**
** Parameters:
** e -- the envelope to deallocate.
**
** Returns:
** none.
**
** Side Effects:
** housekeeping necessary to dispose of an envelope.
** Unlocks this queue file.
*/
void
dropenvelope(e)
register ENVELOPE *e;
{
bool queueit = FALSE;
register ADDRESS *q;
char *id = e->e_id;
if (tTd(50, 1))
{
printf("dropenvelope %x: id=", e);
xputs(e->e_id);
printf(", flags=%o\n", e->e_flags);
}
/* we must have an id to remove disk files */
if (id == NULL)
return;
#ifdef LOG
if (LogLevel > 84)
syslog(LOG_DEBUG, "dropenvelope, id=%s, flags=%o, pid=%d",
id, e->e_flags, getpid());
#endif /* LOG */
/*
** Extract state information from dregs of send list.
*/
for (q = e->e_sendqueue; q != NULL; q = q->q_next)
{
if (bitset(QQUEUEUP, q->q_flags))
queueit = TRUE;
}
/*
** Send back return receipts as requested.
*/
if (e->e_receiptto != NULL && bitset(EF_SENDRECEIPT, e->e_flags))
{
auto ADDRESS *rlist = NULL;
(void) sendtolist(e->e_receiptto, (ADDRESS *) NULL, &rlist, e);
(void) returntosender("Return receipt", rlist, FALSE, e);
}
/*
** Arrange to send error messages if there are fatal errors.
*/
if (bitset(EF_FATALERRS|EF_TIMEOUT, e->e_flags) &&
e->e_errormode != EM_QUIET)
savemail(e);
/*
** Instantiate or deinstantiate the queue.
*/
if ((!queueit && !bitset(EF_KEEPQUEUE, e->e_flags)) ||
bitset(EF_CLRQUEUE, e->e_flags))
{
if (e->e_df != NULL)
xunlink(e->e_df);
xunlink(queuename(e, 'q'));
}
else if (queueit || !bitset(EF_INQUEUE, e->e_flags))
{
#ifdef QUEUE
queueup(e, FALSE, FALSE);
#else /* QUEUE */
syserr("554 dropenvelope: queueup");
#endif /* QUEUE */
}
/* now unlock the job */
closexscript(e);
unlockqueue(e);
/* make sure that this envelope is marked unused */
if (e->e_dfp != NULL)
(void) xfclose(e->e_dfp, "dropenvelope", e->e_df);
e->e_dfp = NULL;
e->e_id = e->e_df = NULL;
#ifdef LOG
if (LogLevel > 74)
syslog(LOG_INFO, "%s: done", id);
#endif /* LOG */
}
/*
** CLEARENVELOPE -- clear an envelope without unlocking
**
** This is normally used by a child process to get a clean
** envelope without disturbing the parent.
**
** Parameters:
** e -- the envelope to clear.
** fullclear - if set, the current envelope is total
** garbage and should be ignored; otherwise,
** release any resources it may indicate.
**
** Returns:
** none.
**
** Side Effects:
** Closes files associated with the envelope.
** Marks the envelope as unallocated.
*/
void
clearenvelope(e, fullclear)
register ENVELOPE *e;
bool fullclear;
{
register HDR *bh;
register HDR **nhp;
extern ENVELOPE BlankEnvelope;
if (!fullclear)
{
/* clear out any file information */
if (e->e_xfp != NULL)
(void) xfclose(e->e_xfp, "clearenvelope xfp", e->e_id);
if (e->e_dfp != NULL)
(void) xfclose(e->e_dfp, "clearenvelope dfp", e->e_df);
e->e_xfp = e->e_dfp = NULL;
}
/* now clear out the data */
STRUCTCOPY(BlankEnvelope, *e);
if (Verbose)
e->e_sendmode = SM_DELIVER;
bh = BlankEnvelope.e_header;
nhp = &e->e_header;
while (bh != NULL)
{
*nhp = (HDR *) xalloc(sizeof *bh);
bcopy((char *) bh, (char *) *nhp, sizeof *bh);
bh = bh->h_link;
nhp = &(*nhp)->h_link;
}
}
/*
** INITSYS -- initialize instantiation of system
**
** In Daemon mode, this is done in the child.
**
** Parameters:
** none.
**
** Returns:
** none.
**
** Side Effects:
** Initializes the system macros, some global variables,
** etc. In particular, the current time in various
** forms is set.
*/
void
initsys(e)
register ENVELOPE *e;
{
static char cbuf[5]; /* holds hop count */
static char pbuf[10]; /* holds pid */
#ifdef TTYNAME
static char ybuf[60]; /* holds tty id */
register char *p;
#endif /* TTYNAME */
extern char *ttyname();
extern void settime();
extern char Version[];
/*
** Give this envelope a reality.
** I.e., an id, a transcript, and a creation time.
*/
openxscript(e);
e->e_ctime = curtime();
/*
** Set OutChannel to something useful if stdout isn't it.
** This arranges that any extra stuff the mailer produces
** gets sent back to the user on error (because it is
** tucked away in the transcript).
*/
if (OpMode == MD_DAEMON && !bitset(EF_QUEUERUN, e->e_flags) &&
e->e_xfp != NULL)
OutChannel = e->e_xfp;
/*
** Set up some basic system macros.
*/
/* process id */
(void) sprintf(pbuf, "%d", getpid());
define('p', pbuf, e);
/* hop count */
(void) sprintf(cbuf, "%d", e->e_hopcount);
define('c', cbuf, e);
/* time as integer, unix time, arpa time */
settime(e);
#ifdef TTYNAME
/* tty name */
if (macvalue('y', e) == NULL)
{
p = ttyname(2);
if (p != NULL)
{
if (strrchr(p, '/') != NULL)
p = strrchr(p, '/') + 1;
(void) strcpy(ybuf, p);
define('y', ybuf, e);
}
}
#endif /* TTYNAME */
}
/*
** SETTIME -- set the current time.
**
** Parameters:
** none.
**
** Returns:
** none.
**
** Side Effects:
** Sets the various time macros -- $a, $b, $d, $t.
*/
void
settime(e)
register ENVELOPE *e;
{
register char *p;
auto time_t now;
static char tbuf[20]; /* holds "current" time */
static char dbuf[30]; /* holds ctime(tbuf) */
register struct tm *tm;
extern char *arpadate();
extern struct tm *gmtime();
now = curtime();
tm = gmtime(&now);
(void) sprintf(tbuf, "%04d%02d%02d%02d%02d", tm->tm_year + 1900,
tm->tm_mon+1, tm->tm_mday, tm->tm_hour, tm->tm_min);
define('t', tbuf, e);
(void) strcpy(dbuf, ctime(&now));
p = strchr(dbuf, '\n');
if (p != NULL)
*p = '\0';
define('d', dbuf, e);
p = newstr(arpadate(dbuf));
if (macvalue('a', e) == NULL)
define('a', p, e);
define('b', p, e);
}
/*
** OPENXSCRIPT -- Open transcript file
**
** Creates a transcript file for possible eventual mailing or
** sending back.
**
** Parameters:
** e -- the envelope to create the transcript in/for.
**
** Returns:
** none
**
** Side Effects:
** Creates the transcript file.
*/
#ifndef O_APPEND
#define O_APPEND 0
#endif
void
openxscript(e)
register ENVELOPE *e;
{
register char *p;
int fd;
if (e->e_xfp != NULL)
return;
p = queuename(e, 'x');
fd = open(p, O_WRONLY|O_CREAT|O_APPEND, 0644);
if (fd < 0)
syserr("Can't create %s", p);
else
e->e_xfp = fdopen(fd, "w");
}
/*
** CLOSEXSCRIPT -- close the transcript file.
**
** Parameters:
** e -- the envelope containing the transcript to close.
**
** Returns:
** none.
**
** Side Effects:
** none.
*/
void
closexscript(e)
register ENVELOPE *e;
{
if (e->e_xfp == NULL)
return;
(void) xfclose(e->e_xfp, "closexscript", e->e_id);
e->e_xfp = NULL;
}
/*
** SETSENDER -- set the person who this message is from
**
** Under certain circumstances allow the user to say who
** s/he is (using -f or -r). These are:
** 1. The user's uid is zero (root).
** 2. The user's login name is in an approved list (typically
** from a network server).
** 3. The address the user is trying to claim has a
** "!" character in it (since #2 doesn't do it for
** us if we are dialing out for UUCP).
** A better check to replace #3 would be if the
** effective uid is "UUCP" -- this would require me
** to rewrite getpwent to "grab" uucp as it went by,
** make getname more nasty, do another passwd file
** scan, or compile the UID of "UUCP" into the code,
** all of which are reprehensible.
**
** Assuming all of these fail, we figure out something
** ourselves.
**
** Parameters:
** from -- the person we would like to believe this message
** is from, as specified on the command line.
** e -- the envelope in which we would like the sender set.
** delimptr -- if non-NULL, set to the location of the
** trailing delimiter.
** internal -- set if this address is coming from an internal
** source such as an owner alias.
**
** Returns:
** none.
**
** Side Effects:
** sets sendmail's notion of who the from person is.
*/
void
setsender(from, e, delimptr, internal)
char *from;
register ENVELOPE *e;
char **delimptr;
bool internal;
{
register char **pvp;
char *realname = NULL;
register struct passwd *pw;
char delimchar;
char buf[MAXNAME];
char pvpbuf[PSBUFSIZE];
extern struct passwd *getpwnam();
extern char *FullName;
if (tTd(45, 1))
printf("setsender(%s)\n", from == NULL ? "" : from);
/*
** Figure out the real user executing us.
** Username can return errno != 0 on non-errors.
*/
if (bitset(EF_QUEUERUN, e->e_flags) || OpMode == MD_SMTP)
realname = from;
if (realname == NULL || realname[0] == '\0')
realname = username();
if (ConfigLevel < 2)
SuprErrs = TRUE;
delimchar = internal ? '\0' : ' ';
if (from == NULL ||
parseaddr(from, &e->e_from, 1, delimchar, delimptr, e) == NULL)
{
/* log garbage addresses for traceback */
# ifdef LOG
if (from != NULL && LogLevel > 2)
{
char *p;
char ebuf[MAXNAME * 2 + 2];
p = macvalue('_', e);
if (p == NULL)
{
char *host = RealHostName;
if (host == NULL)
host = MyHostName;
(void) sprintf(ebuf, "%s@%s", realname, host);
p = ebuf;
}
syslog(LOG_NOTICE,
"from=%s unparseable, received from %s",
from, p);
}
# endif /* LOG */
if (from != NULL)
SuprErrs = TRUE;
if (from == realname ||
parseaddr(from = newstr(realname), &e->e_from, 1, ' ', NULL, e) == NULL)
{
SuprErrs = TRUE;
if (parseaddr("postmaster", &e->e_from, 1, ' ', NULL, e) == NULL)
syserr("553 setsender: can't even parse postmaster!");
}
}
else
FromFlag = TRUE;
e->e_from.q_flags |= QDONTSEND;
if (tTd(45, 5))
{
printf("setsender: QDONTSEND ");
printaddr(&e->e_from, FALSE);
}
SuprErrs = FALSE;
pvp = NULL;
if (e->e_from.q_mailer == LocalMailer)
{
# ifdef USERDB
register char *p;
extern char *udbsender();
# endif
if (!internal)
{
/* if the user has given fullname already, don't redefine */
if (FullName == NULL)
FullName = macvalue('x', e);
if (FullName != NULL && FullName[0] == '\0')
FullName = NULL;
# ifdef USERDB
p = udbsender(from);
if (p != NULL)
{
/*
** We have an alternate address for the sender
*/
pvp = prescan(p, '\0', pvpbuf, NULL);
}
# endif /* USERDB */
}
if ((pw = getpwnam(e->e_from.q_user)) != NULL)
{
/*
** Process passwd file entry.
*/
/* extract home directory */
e->e_from.q_home = newstr(pw->pw_dir);
define('z', e->e_from.q_home, e);
/* extract user and group id */
e->e_from.q_uid = pw->pw_uid;
e->e_from.q_gid = pw->pw_gid;
/* extract full name from passwd file */
if (FullName == NULL && pw->pw_gecos != NULL &&
strcmp(pw->pw_name, e->e_from.q_user) == 0 &&
!internal)
{
buildfname(pw->pw_gecos, e->e_from.q_user, buf);
if (buf[0] != '\0')
FullName = newstr(buf);
}
}
if (FullName != NULL && !internal)
define('x', FullName, e);
}
else if (!internal)
{
if (e->e_from.q_home == NULL)
e->e_from.q_home = getenv("HOME");
e->e_from.q_uid = getuid();
e->e_from.q_gid = getgid();
}
/*
** Rewrite the from person to dispose of possible implicit
** links in the net.
*/
if (pvp == NULL)
pvp = prescan(from, '\0', pvpbuf, NULL);
if (pvp == NULL)
{
/* don't need to give error -- prescan did that already */
# ifdef LOG
if (LogLevel > 2)
syslog(LOG_NOTICE, "cannot prescan from (%s)", from);
# endif
finis();
}
(void) rewrite(pvp, 3, e);
(void) rewrite(pvp, 1, e);
(void) rewrite(pvp, 4, e);
cataddr(pvp, NULL, buf, sizeof buf, '\0');
e->e_sender = newstr(buf);
define('f', e->e_sender, e);
/* save the domain spec if this mailer wants it */
if (!internal && e->e_from.q_mailer != NULL &&
bitnset(M_CANONICAL, e->e_from.q_mailer->m_flags))
{
extern char **copyplist();
while (*pvp != NULL && strcmp(*pvp, "@") != 0)
pvp++;
if (*pvp != NULL)
e->e_fromdomain = copyplist(pvp, TRUE);
}
}