Imported Upstream version 8.8.8upstream/8.8.8

1 files changed, 959 insertions, 0 deletions

diff --git a/src/envelope.c b/src/envelope.c
new file mode 100644
index 0000000..3e0fc20
--- /dev/null
+++ b/src/envelope.c
@@ -0,0 +1,959 @@
+/*
+ * Copyright (c) 1983, 1995-1997 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	8.105 (Berkeley) 6/24/97";
+#endif /* not lint */
+
+#include "sendmail.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;
+{
+	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.
+**		fulldrop -- if set, do return receipts.
+**
+**	Returns:
+**		none.
+**
+**	Side Effects:
+**		housekeeping necessary to dispose of an envelope.
+**		Unlocks this queue file.
+*/
+
+void
+dropenvelope(e, fulldrop)
+	register ENVELOPE *e;
+	bool fulldrop;
+{
+	bool queueit = FALSE;
+	bool message_timeout = FALSE;
+	bool failure_return = FALSE;
+	bool delay_return = FALSE;
+	bool success_return = FALSE;
+	register ADDRESS *q;
+	char *id = e->e_id;
+	char buf[MAXLINE];
+
+	if (tTd(50, 1))
+	{
+		extern void printenvflags();
+
+		printf("dropenvelope %lx: id=", (u_long) e);
+		xputs(e->e_id);
+		printf(", flags=");
+		printenvflags(e);
+		if (tTd(50, 10))
+		{
+			printf("sendq=");
+			printaddr(e->e_sendqueue, TRUE);
+		}
+	}
+
+	if (LogLevel > 84)
+		sm_syslog(LOG_DEBUG, id,
+			"dropenvelope, e_flags=0x%x, OpMode=%c, pid=%d",
+			e->e_flags, OpMode, getpid());
+
+	/* we must have an id to remove disk files */
+	if (id == NULL)
+		return;
+
+	/* if verify-only mode, we can skip most of this */
+	if (OpMode == MD_VERIFY)
+		goto simpledrop;
+
+	if (LogLevel > 4 && bitset(EF_LOGSENDER, e->e_flags))
+		logsender(e, NULL);
+	e->e_flags &= ~EF_LOGSENDER;
+
+	/* post statistics */
+	poststats(StatFile);
+
+	/*
+	**  Extract state information from dregs of send list.
+	*/
+
+	if (curtime() > e->e_ctime + TimeOuts.to_q_return[e->e_timeoutclass])
+		message_timeout = TRUE;
+
+	e->e_flags &= ~EF_QUEUERUN;
+	for (q = e->e_sendqueue; q != NULL; q = q->q_next)
+	{
+		if (bitset(QQUEUEUP, q->q_flags) &&
+		    bitset(QDONTSEND, q->q_flags))
+		{
+			/* I'm not sure how this happens..... */
+			if (tTd(50, 2))
+			{
+				printf("Bogus flags: ");
+				printaddr(q, FALSE);
+			}
+			q->q_flags &= ~QDONTSEND;
+		}
+		if (!bitset(QBADADDR|QDONTSEND|QSENT, q->q_flags))
+			queueit = TRUE;
+#if XDEBUG
+		else if (bitset(QQUEUEUP, q->q_flags))
+			sm_syslog(LOG_DEBUG, e->e_id,
+				"dropenvelope: q_flags = %x, paddr = %s",
+				q->q_flags, q->q_paddr);
+#endif
+
+		/* see if a notification is needed */
+		if (bitset(QPINGONFAILURE, q->q_flags) &&
+		    ((message_timeout && bitset(QQUEUEUP, q->q_flags)) ||
+		     bitset(QBADADDR, q->q_flags)))
+		{
+			failure_return = TRUE;
+			if (q->q_owner == NULL && !emptyaddr(&e->e_from))
+				(void) sendtolist(e->e_from.q_paddr, NULLADDR,
+						  &e->e_errorqueue, 0, e);
+		}
+		else if (bitset(QPINGONSUCCESS, q->q_flags) &&
+			 ((bitset(QSENT, q->q_flags) &&
+			   bitnset(M_LOCALMAILER, q->q_mailer->m_flags)) ||
+			  bitset(QRELAYED|QEXPANDED|QDELIVERED, q->q_flags)))
+		{
+			success_return = TRUE;
+		}
+	}
+
+	if (e->e_class < 0)
+		e->e_flags |= EF_NO_BODY_RETN;
+
+	/*
+	**  See if the message timed out.
+	*/
+
+	if (!queueit)
+		/* nothing to do */ ;
+	else if (message_timeout)
+	{
+		if (failure_return)
+		{
+			(void) snprintf(buf, sizeof buf,
+				"Cannot send message within %s",
+				pintvl(TimeOuts.to_q_return[e->e_timeoutclass], FALSE));
+			if (e->e_message != NULL)
+				free(e->e_message);
+			e->e_message = newstr(buf);
+			message(buf);
+			e->e_flags |= EF_CLRQUEUE;
+		}
+		fprintf(e->e_xfp, "Message could not be delivered for %s\n",
+			pintvl(TimeOuts.to_q_return[e->e_timeoutclass], FALSE));
+		fprintf(e->e_xfp, "Message will be deleted from queue\n");
+		for (q = e->e_sendqueue; q != NULL; q = q->q_next)
+		{
+			if (!bitset(QBADADDR|QDONTSEND|QSENT, q->q_flags))
+			{
+				q->q_flags |= QBADADDR;
+				q->q_status = "4.4.7";
+			}
+		}
+	}
+	else if (TimeOuts.to_q_warning[e->e_timeoutclass] > 0 &&
+	    curtime() > e->e_ctime + TimeOuts.to_q_warning[e->e_timeoutclass])
+	{
+		if (!bitset(EF_WARNING|EF_RESPONSE, e->e_flags) &&
+		    e->e_class >= 0 &&
+		    e->e_from.q_paddr != NULL &&
+		    strcmp(e->e_from.q_paddr, "<>") != 0 &&
+		    strncasecmp(e->e_from.q_paddr, "owner-", 6) != 0 &&
+		    (strlen(e->e_from.q_paddr) <= (SIZE_T) 8 ||
+		     strcasecmp(&e->e_from.q_paddr[strlen(e->e_from.q_paddr) - 8], "-request") != 0))
+		{
+			for (q = e->e_sendqueue; q != NULL; q = q->q_next)
+			{
+				if (bitset(QQUEUEUP, q->q_flags) &&
+				    bitset(QPINGONDELAY, q->q_flags))
+				{
+					q->q_flags |= QDELAYED;
+					delay_return = TRUE;
+				}
+			}
+		}
+		if (delay_return)
+		{
+			(void) snprintf(buf, sizeof buf,
+				"Warning: could not send message for past %s",
+				pintvl(TimeOuts.to_q_warning[e->e_timeoutclass], FALSE));
+			if (e->e_message != NULL)
+				free(e->e_message);
+			e->e_message = newstr(buf);
+			message(buf);
+			e->e_flags |= EF_WARNING;
+		}
+		fprintf(e->e_xfp,
+			"Warning: message still undelivered after %s\n",
+			pintvl(TimeOuts.to_q_warning[e->e_timeoutclass], FALSE));
+		fprintf(e->e_xfp, "Will keep trying until message is %s old\n",
+			pintvl(TimeOuts.to_q_return[e->e_timeoutclass], FALSE));
+	}
+
+	if (tTd(50, 2))
+		printf("failure_return=%d delay_return=%d success_return=%d queueit=%d\n",
+			failure_return, delay_return, success_return, queueit);
+
+	/*
+	**  If we had some fatal error, but no addresses are marked as
+	**  bad, mark them _all_ as bad.
+	*/
+
+	if (bitset(EF_FATALERRS, e->e_flags) && !failure_return)
+	{
+		for (q = e->e_sendqueue; q != NULL; q = q->q_next)
+		{
+			if (!bitset(QDONTSEND, q->q_flags) &&
+			    bitset(QPINGONFAILURE, q->q_flags))
+			{
+				failure_return = TRUE;
+				q->q_flags |= QBADADDR;
+			}
+		}
+	}
+
+	/*
+	**  Send back return receipts as requested.
+	*/
+
+	if (success_return && !failure_return && !delay_return && fulldrop &&
+	    !bitset(PRIV_NORECEIPTS, PrivacyFlags) &&
+	    strcmp(e->e_from.q_paddr, "<>") != 0)
+	{
+		auto ADDRESS *rlist = NULL;
+
+		if (tTd(50, 8))
+			printf("dropenvelope(%s): sending return receipt\n", id);
+		e->e_flags |= EF_SENDRECEIPT;
+		(void) sendtolist(e->e_from.q_paddr, NULLADDR, &rlist, 0, e);
+		(void) returntosender("Return receipt", rlist, RTSF_NO_BODY, e);
+	}
+	e->e_flags &= ~EF_SENDRECEIPT;
+
+	/*
+	**  Arrange to send error messages if there are fatal errors.
+	*/
+
+	if ((failure_return || delay_return) && e->e_errormode != EM_QUIET)
+	{
+		extern void savemail __P((ENVELOPE *, bool));
+
+		if (tTd(50, 8))
+			printf("dropenvelope(%s): saving mail\n", id);
+		savemail(e, !bitset(EF_NO_BODY_RETN, e->e_flags));
+	}
+
+	/*
+	**  Arrange to send warning messages to postmaster as requested.
+	*/
+
+	if ((failure_return || bitset(EF_PM_NOTIFY, e->e_flags)) &&
+	    PostMasterCopy != NULL &&
+	    !bitset(EF_RESPONSE, e->e_flags) && e->e_class >= 0)
+	{
+		auto ADDRESS *rlist = NULL;
+
+		if (tTd(50, 8))
+			printf("dropenvelope(%s): sending postmaster copy\n", id);
+		(void) sendtolist(PostMasterCopy, NULLADDR, &rlist, 0, e);
+		(void) returntosender(e->e_message, rlist, RTSF_PM_BOUNCE, e);
+	}
+
+	/*
+	**  Instantiate or deinstantiate the queue.
+	*/
+
+simpledrop:
+	if (tTd(50, 8))
+		printf("dropenvelope(%s): at simpledrop, queueit=%d\n",
+			id, queueit);
+	if (!queueit || bitset(EF_CLRQUEUE, e->e_flags))
+	{
+		if (tTd(50, 1))
+		{
+			extern void printenvflags();
+
+			printf("\n===== Dropping [dq]f%s... queueit=%d, e_flags=",
+				e->e_id, queueit);
+			printenvflags(e);
+		}
+		xunlink(queuename(e, 'd'));
+		xunlink(queuename(e, 'q'));
+
+		if (LogLevel > 10)
+			sm_syslog(LOG_INFO, id, "done");
+	}
+	else if (queueit || !bitset(EF_INQUEUE, e->e_flags))
+	{
+#if QUEUE
+		queueup(e, FALSE);
+#else /* QUEUE */
+		syserr("554 dropenvelope: queueup");
+#endif /* QUEUE */
+	}
+
+	/* now unlock the job */
+	if (tTd(50, 8))
+		printf("dropenvelope(%s): unlocking job\n", id);
+	closexscript(e);
+	unlockqueue(e);
+
+	/* make sure that this envelope is marked unused */
+	if (e->e_dfp != NULL)
+		(void) xfclose(e->e_dfp, "dropenvelope df", e->e_id);
+	e->e_dfp = NULL;
+	e->e_id = NULL;
+	e->e_flags &= ~EF_HAS_DF;
+}
+/*
+**  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_id);
+		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;
+{
+	char cbuf[5];				/* holds hop count */
+	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();
+
+	/*
+	**  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) snprintf(pbuf, sizeof pbuf, "%d", getpid());
+	define('p', newstr(pbuf), e);
+
+	/* hop count */
+	(void) snprintf(cbuf, sizeof cbuf, "%d", e->e_hopcount);
+	define('c', newstr(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;
+			snprintf(ybuf, sizeof ybuf, "%s", 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;
+	char tbuf[20];				/* holds "current" time */
+	char dbuf[30];				/* holds ctime(tbuf) */
+	register struct tm *tm;
+	extern struct tm *gmtime();
+
+	now = curtime();
+	tm = gmtime(&now);
+	(void) snprintf(tbuf, sizeof 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', newstr(tbuf), e);
+	(void) strcpy(dbuf, ctime(&now));
+	p = strchr(dbuf, '\n');
+	if (p != NULL)
+		*p = '\0';
+	define('d', newstr(dbuf), e);
+	p = arpadate(dbuf);
+	p = newstr(p);
+	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, FileMode);
+	if (fd < 0)
+	{
+		syserr("Can't create transcript file %s", p);
+		fd = open("/dev/null", O_WRONLY, 0644);
+		if (fd < 0)
+			syserr("!Can't open /dev/null");
+	}
+	e->e_xfp = fdopen(fd, "a");
+	if (e->e_xfp == NULL)
+		syserr("!Can't create transcript stream %s", p);
+#ifdef HASSETVBUF
+	setvbuf(e->e_xfp, NULL, _IOLBF, 0);
+#else
+	setlinebuf(e->e_xfp);
+#endif
+	if (tTd(46, 9))
+	{
+		printf("openxscript(%s):\n  ", p);
+		dumpfd(fileno(e->e_xfp), TRUE, FALSE);
+	}
+}
+/*
+**  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.
+**		delimchar -- the character that will delimit the sender
+**			address.
+**		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, delimchar, internal)
+	char *from;
+	register ENVELOPE *e;
+	char **delimptr;
+	int delimchar;
+	bool internal;
+{
+	register char **pvp;
+	char *realname = NULL;
+	register struct passwd *pw;
+	char *bp;
+	char buf[MAXNAME + 2];
+	char pvpbuf[PSBUFSIZE];
+	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 ||
+	    OpMode == MD_ARPAFTP || OpMode == MD_DAEMON)
+		realname = from;
+	if (realname == NULL || realname[0] == '\0')
+		realname = username();
+
+	if (ConfigLevel < 2)
+		SuprErrs = TRUE;
+
+	e->e_from.q_flags = QBADADDR;
+	if (from == NULL ||
+	    parseaddr(from, &e->e_from, RF_COPYALL|RF_SENDERADDR,
+		      delimchar, delimptr, e) == NULL ||
+	    bitset(QBADADDR, e->e_from.q_flags) ||
+	    e->e_from.q_mailer == ProgMailer ||
+	    e->e_from.q_mailer == FileMailer ||
+	    e->e_from.q_mailer == InclMailer)
+	{
+		/* log garbage addresses for traceback */
+		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) snprintf(ebuf, sizeof ebuf, "%.*s@%.*s",
+					MAXNAME, realname,
+					MAXNAME, host);
+				p = ebuf;
+			}
+			sm_syslog(LOG_NOTICE, e->e_id,
+				"setsender: %s: invalid or unparseable, received from %s",
+				shortenstring(from, 83), p);
+		}
+		if (from != NULL)
+		{
+			if (!bitset(QBADADDR, e->e_from.q_flags))
+			{
+				/* it was a bogus mailer in the from addr */
+				e->e_status = "5.1.7";
+				usrerr("553 Invalid sender address");
+			}
+			SuprErrs = TRUE;
+		}
+		if (from == realname ||
+		    parseaddr(from = newstr(realname), &e->e_from,
+			      RF_COPYALL|RF_SENDERADDR, ' ', NULL, e) == NULL)
+		{
+			char nbuf[100];
+
+			SuprErrs = TRUE;
+			expand("\201n", nbuf, sizeof nbuf, e);
+			if (parseaddr(from = newstr(nbuf), &e->e_from,
+				      RF_COPYALL, ' ', NULL, e) == NULL &&
+			    parseaddr(from = "postmaster", &e->e_from,
+			    	      RF_COPYALL, ' ', 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;
+
+# if USERDB
+	if (bitnset(M_CHECKUDB, e->e_from.q_mailer->m_flags))
+	{
+		register char *p;
+		extern char *udbsender();
+
+		p = udbsender(e->e_from.q_user);
+		if (p != NULL)
+			from = p;
+	}
+# endif /* USERDB */
+
+	if (bitnset(M_HASPWENT, e->e_from.q_mailer->m_flags))
+	{
+		if (!internal)
+		{
+			/* if the user already given fullname don't redefine */
+			if (FullName == NULL)
+				FullName = macvalue('x', e);
+			if (FullName != NULL && FullName[0] == '\0')
+				FullName = NULL;
+		}
+
+		if (e->e_from.q_user[0] != '\0' &&
+		    (pw = sm_getpwnam(e->e_from.q_user)) != NULL)
+		{
+			/*
+			**  Process passwd file entry.
+			*/
+
+			/* extract home directory */
+			if (strcmp(pw->pw_dir, "/") == 0)
+				e->e_from.q_home = newstr("");
+			else
+				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;
+			e->e_from.q_flags |= QGOODUID;
+
+			/* 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, sizeof buf);
+				if (buf[0] != '\0')
+					FullName = newstr(buf);
+			}
+		}
+		else
+		{
+			e->e_from.q_home = "/no/such/directory";
+		}
+		if (FullName != NULL && !internal)
+			define('x', FullName, e);
+	}
+	else if (!internal && OpMode != MD_DAEMON)
+	{
+		if (e->e_from.q_home == NULL)
+		{
+			e->e_from.q_home = getenv("HOME");
+			if (e->e_from.q_home != NULL &&
+			    strcmp(e->e_from.q_home, "/") == 0)
+				e->e_from.q_home++;
+		}
+		e->e_from.q_uid = RealUid;
+		e->e_from.q_gid = RealGid;
+		e->e_from.q_flags |= QGOODUID;
+	}
+
+	/*
+	**  Rewrite the from person to dispose of possible implicit
+	**	links in the net.
+	*/
+
+	pvp = prescan(from, delimchar, pvpbuf, sizeof pvpbuf, NULL, NULL);
+	if (pvp == NULL)
+	{
+		/* don't need to give error -- prescan did that already */
+		if (LogLevel > 2)
+			sm_syslog(LOG_NOTICE, e->e_id,
+				"cannot prescan from (%s)",
+				shortenstring(from, 203));
+		finis();
+	}
+	(void) rewrite(pvp, 3, 0, e);
+	(void) rewrite(pvp, 1, 0, e);
+	(void) rewrite(pvp, 4, 0, e);
+	bp = buf + 1;
+	cataddr(pvp, NULL, bp, sizeof buf - 2, '\0');
+	if (*bp == '@' && !bitnset(M_NOBRACKET, e->e_from.q_mailer->m_flags))
+	{
+		/* heuristic: route-addr: add angle brackets */
+		strcat(bp, ">");
+		*--bp = '<';
+	}
+	e->e_sender = newstr(bp);
+	define('f', e->e_sender, e);
+
+	/* save the domain spec if this mailer wants it */
+	if (e->e_from.q_mailer != NULL &&
+	    bitnset(M_CANONICAL, e->e_from.q_mailer->m_flags))
+	{
+		char **lastat;
+		extern char **copyplist();
+
+		/* get rid of any pesky angle brackets */
+		(void) rewrite(pvp, 3, 0, e);
+		(void) rewrite(pvp, 1, 0, e);
+		(void) rewrite(pvp, 4, 0, e);
+
+		/* strip off to the last "@" sign */
+		for (lastat = NULL; *pvp != NULL; pvp++)
+			if (strcmp(*pvp, "@") == 0)
+				lastat = pvp;
+		if (lastat != NULL)
+		{
+			e->e_fromdomain = copyplist(lastat, TRUE);
+			if (tTd(45, 3))
+			{
+				printf("Saving from domain: ");
+				printav(e->e_fromdomain);
+			}
+		}
+	}
+}
+/*
+**  PRINTENVFLAGS -- print envelope flags for debugging
+**
+**	Parameters:
+**		e -- the envelope with the flags to be printed.
+**
+**	Returns:
+**		none.
+*/
+
+struct eflags
+{
+	char	*ef_name;
+	u_long	ef_bit;
+};
+
+struct eflags	EnvelopeFlags[] =
+{
+	{ "OLDSTYLE",		EF_OLDSTYLE	},
+	{ "INQUEUE",		EF_INQUEUE	},
+	{ "NO_BODY_RETN",	EF_NO_BODY_RETN	},
+	{ "CLRQUEUE",		EF_CLRQUEUE	},
+	{ "SENDRECEIPT",	EF_SENDRECEIPT	},
+	{ "FATALERRS",		EF_FATALERRS	},
+	{ "DELETE_BCC",		EF_DELETE_BCC	},
+	{ "RESPONSE",		EF_RESPONSE	},
+	{ "RESENT",		EF_RESENT	},
+	{ "VRFYONLY",		EF_VRFYONLY	},
+	{ "WARNING",		EF_WARNING	},
+	{ "QUEUERUN",		EF_QUEUERUN	},
+	{ "GLOBALERRS",		EF_GLOBALERRS	},
+	{ "PM_NOTIFY",		EF_PM_NOTIFY	},
+	{ "METOO",		EF_METOO	},
+	{ "LOGSENDER",		EF_LOGSENDER	},
+	{ "NORECEIPT",		EF_NORECEIPT	},
+	{ "HAS8BIT",		EF_HAS8BIT	},
+	{ "NL_NOT_EOL",		EF_NL_NOT_EOL	},
+	{ "CRLF_NOT_EOL",	EF_CRLF_NOT_EOL	},
+	{ "RET_PARAM",		EF_RET_PARAM	},
+	{ "HAS_DF",		EF_HAS_DF	},
+	{ "IS_MIME",		EF_IS_MIME	},
+	{ "DONT_MIME",		EF_DONT_MIME	},
+	{ NULL }
+};
+
+void
+printenvflags(e)
+	register ENVELOPE *e;
+{
+	register struct eflags *ef;
+	bool first = TRUE;
+
+	printf("%lx", e->e_flags);
+	for (ef = EnvelopeFlags; ef->ef_name != NULL; ef++)
+	{
+		if (!bitset(ef->ef_bit, e->e_flags))
+			continue;
+		if (first)
+			printf("<%s", ef->ef_name);
+		else
+			printf(",%s", ef->ef_name);
+		first = FALSE;
+	}
+	if (!first)
+		printf(">\n");
+}