Imported Upstream version 8.8.8upstream/8.8.8

1 files changed, 1466 insertions, 0 deletions

diff --git a/src/sendmail.h b/src/sendmail.h
new file mode 100644
index 0000000..fc3bf49
--- /dev/null
+++ b/src/sendmail.h
@@ -0,0 +1,1466 @@
+/*
+ * 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.
+ *
+ *	@(#)sendmail.h	8.245 (Berkeley) 10/22/97
+ */
+
+/*
+**  SENDMAIL.H -- Global definitions for sendmail.
+*/
+
+# ifdef _DEFINE
+# define EXTERN
+# ifndef lint
+static char SmailSccsId[] =	"@(#)sendmail.h	8.245		10/22/97";
+# endif
+# else /*  _DEFINE */
+# define EXTERN extern
+# endif /* _DEFINE */
+
+# include <unistd.h>
+# include <stddef.h>
+# include <stdlib.h>
+# include <stdio.h>
+# include <ctype.h>
+# include <setjmp.h>
+# include <string.h>
+# include <time.h>
+# include <errno.h>
+# ifdef EX_OK
+#  undef EX_OK			/* for SVr4.2 SMP */
+# endif
+# include <sysexits.h>
+
+# include "conf.h"
+# include "useful.h"
+
+# ifdef LOG
+# include <syslog.h>
+# endif /* LOG */
+
+# if NETINET || NETUNIX || NETISO || NETNS || NETX25
+# include <sys/socket.h>
+# endif
+# if NETUNIX
+# include <sys/un.h>
+# endif
+# if NETINET
+# include <netinet/in.h>
+# endif
+# if NETISO
+# include <netiso/iso.h>
+# endif
+# if NETNS
+# include <netns/ns.h>
+# endif
+# if NETX25
+# include <netccitt/x25.h>
+# endif
+
+#if NAMED_BIND
+# include <arpa/nameser.h>
+# ifdef NOERROR
+#  undef NOERROR		/* avoid <sys/streams.h> conflict */
+# endif
+#endif
+
+/*
+**  Following are "sort of" configuration constants, but they should
+**  be pretty solid on most architectures today.  They have to be
+**  defined after <arpa/nameser.h> because some versions of that
+**  file also define them.  In all cases, we can't use sizeof because
+**  some systems (e.g., Crays) always treat everything as being at
+**  least 64 bits.
+*/
+
+#ifndef INADDRSZ
+# define INADDRSZ	4		/* size of an IPv4 address in bytes */
+#endif
+#ifndef INT16SZ
+# define INT16SZ	2		/* size of a 16 bit integer in bytes */
+#endif
+#ifndef INT32SZ
+# define INT32SZ	4		/* size of a 32 bit integer in bytes */
+#endif
+
+
+
+/* forward references for prototypes */
+typedef struct envelope	ENVELOPE;
+typedef struct mailer	MAILER;
+
+
+/*
+**  Data structure for bit maps.
+**
+**	Each bit in this map can be referenced by an ascii character.
+**	This is 256 possible bits, or 32 8-bit bytes.
+*/
+
+#define BITMAPBYTES	32	/* number of bytes in a bit map */
+#define BYTEBITS	8	/* number of bits in a byte */
+
+/* internal macros */
+#define _BITWORD(bit)	((bit) / (BYTEBITS * sizeof (int)))
+#define _BITBIT(bit)	(1 << ((bit) % (BYTEBITS * sizeof (int))))
+
+typedef int	BITMAP[BITMAPBYTES / sizeof (int)];
+
+/* test bit number N */
+#define bitnset(bit, map)	((map)[_BITWORD(bit)] & _BITBIT(bit))
+
+/* set bit number N */
+#define setbitn(bit, map)	(map)[_BITWORD(bit)] |= _BITBIT(bit)
+
+/* clear bit number N */
+#define clrbitn(bit, map)	(map)[_BITWORD(bit)] &= ~_BITBIT(bit)
+
+/* clear an entire bit map */
+#define clrbitmap(map)		bzero((char *) map, BITMAPBYTES)
+
+
+/*
+**  Utility macros
+*/
+
+/* return number of bytes left in a buffer */
+#define SPACELEFT(buf, ptr)	(sizeof buf - ((ptr) - buf))
+/*
+**  Address structure.
+**	Addresses are stored internally in this structure.
+*/
+
+struct address
+{
+	char		*q_paddr;	/* the printname for the address */
+	char		*q_user;	/* user name */
+	char		*q_ruser;	/* real user name, or NULL if q_user */
+	char		*q_host;	/* host name */
+	struct mailer	*q_mailer;	/* mailer to use */
+	u_long		q_flags;	/* status flags, see below */
+	uid_t		q_uid;		/* user-id of receiver (if known) */
+	gid_t		q_gid;		/* group-id of receiver (if known) */
+	char		*q_home;	/* home dir (local mailer only) */
+	char		*q_fullname;	/* full name if known */
+	struct address	*q_next;	/* chain */
+	struct address	*q_alias;	/* address this results from */
+	char		*q_owner;	/* owner of q_alias */
+	struct address	*q_tchain;	/* temporary use chain */
+	char		*q_orcpt;	/* ORCPT parameter from RCPT TO: line */
+	char		*q_status;	/* status code for DSNs */
+	char		*q_rstatus;	/* remote status message for DSNs */
+	time_t		q_statdate;	/* date of status messages */
+	char		*q_statmta;	/* MTA generating q_rstatus */
+	short		q_specificity;	/* how "specific" this address is */
+};
+
+typedef struct address ADDRESS;
+
+# define QDONTSEND	0x00000001	/* don't send to this address */
+# define QBADADDR	0x00000002	/* this address is verified bad */
+# define QGOODUID	0x00000004	/* the q_uid q_gid fields are good */
+# define QPRIMARY	0x00000008	/* set from RCPT or argv */
+# define QQUEUEUP	0x00000010	/* queue for later transmission */
+# define QSENT		0x00000020	/* has been successfully delivered */
+# define QNOTREMOTE	0x00000040	/* address not for remote forwarding */
+# define QSELFREF	0x00000080	/* this address references itself */
+# define QVERIFIED	0x00000100	/* verified, but not expanded */
+# define QBOGUSSHELL	0x00000400	/* user has no valid shell listed */
+# define QUNSAFEADDR	0x00000800	/* address aquired via unsafe path */
+# define QPINGONSUCCESS	0x00001000	/* give return on successful delivery */
+# define QPINGONFAILURE	0x00002000	/* give return on failure */
+# define QPINGONDELAY	0x00004000	/* give return on message delay */
+# define QHASNOTIFY	0x00008000	/* propogate notify parameter */
+# define QRELAYED	0x00010000	/* DSN: relayed to non-DSN aware sys */
+# define QEXPANDED	0x00020000	/* DSN: undergone list expansion */
+# define QDELIVERED	0x00040000	/* DSN: successful final delivery */
+# define QDELAYED	0x00080000	/* DSN: message delayed */
+# define QTHISPASS	0x40000000	/* temp: address set this pass */
+# define QRCPTOK	0x80000000	/* recipient() processed address */
+
+# define Q_PINGFLAGS	(QPINGONSUCCESS|QPINGONFAILURE|QPINGONDELAY)
+
+# define NULLADDR	((ADDRESS *) NULL)
+
+/* functions */
+extern ADDRESS	*parseaddr __P((char *, ADDRESS *, int, int, char **, ENVELOPE *));
+extern ADDRESS	*buildaddr __P((char **, ADDRESS *, int, ENVELOPE *));
+extern ADDRESS	*recipient __P((ADDRESS *, ADDRESS **, int, ENVELOPE *));
+extern char	**prescan __P((char *, int, char[], int, char **, u_char *));
+extern int	rewrite __P((char **, int, int, ENVELOPE *));
+extern char	*remotename __P((char *, MAILER *, int, int *, ENVELOPE *));
+extern ADDRESS	*getctladdr __P((ADDRESS *));
+extern bool	sameaddr __P((ADDRESS *, ADDRESS *));
+extern bool	emptyaddr __P((ADDRESS *));
+extern void	printaddr __P((ADDRESS *, bool));
+extern void	cataddr __P((char **, char **, char *, int, int));
+extern int	sendtolist __P((char *, ADDRESS *, ADDRESS **, int, ENVELOPE *));
+/*
+**  Mailer definition structure.
+**	Every mailer known to the system is declared in this
+**	structure.  It defines the pathname of the mailer, some
+**	flags associated with it, and the argument vector to
+**	pass to it.  The flags are defined in conf.c
+**
+**	The argument vector is expanded before actual use.  All
+**	words except the first are passed through the macro
+**	processor.
+*/
+
+struct mailer
+{
+	char	*m_name;	/* symbolic name of this mailer */
+	char	*m_mailer;	/* pathname of the mailer to use */
+	char	*m_mtatype;	/* type of this MTA */
+	char	*m_addrtype;	/* type for addresses */
+	char	*m_diagtype;	/* type for diagnostics */
+	BITMAP	m_flags;	/* status flags, see below */
+	short	m_mno;		/* mailer number internally */
+	short	m_nice;		/* niceness to run at (mostly for prog) */
+	char	**m_argv;	/* template argument vector */
+	short	m_sh_rwset;	/* rewrite set: sender header addresses */
+	short	m_se_rwset;	/* rewrite set: sender envelope addresses */
+	short	m_rh_rwset;	/* rewrite set: recipient header addresses */
+	short	m_re_rwset;	/* rewrite set: recipient envelope addresses */
+	char	*m_eol;		/* end of line string */
+	long	m_maxsize;	/* size limit on message to this mailer */
+	int	m_linelimit;	/* max # characters per line */
+	char	*m_execdir;	/* directory to chdir to before execv */
+	uid_t	m_uid;		/* UID to run as */
+	gid_t	m_gid;		/* GID to run as */
+	char	*m_defcharset;	/* default character set */
+};
+
+/* bits for m_flags */
+# define M_ESMTP	'a'	/* run Extended SMTP protocol */
+# define M_ALIASABLE	'A'	/* user can be LHS of an alias */
+# define M_BLANKEND	'b'	/* ensure blank line at end of message */
+# define M_NOCOMMENT	'c'	/* don't include comment part of address */
+# define M_CANONICAL	'C'	/* make addresses canonical "u@dom" */
+# define M_NOBRACKET	'd'	/* never angle bracket envelope route-addrs */
+		/*	'D'	   CF: include Date: */
+# define M_EXPENSIVE	'e'	/* it costs to use this mailer.... */
+# define M_ESCFROM	'E'	/* escape From lines to >From */
+# define M_FOPT		'f'	/* mailer takes picky -f flag */
+		/*	'F'	   CF: include From: or Resent-From: */
+# define M_NO_NULL_FROM	'g'	/* sender of errors should be $g */
+# define M_HST_UPPER	'h'	/* preserve host case distinction */
+# define M_PREHEAD	'H'	/* MAIL11V3: preview headers */
+# define M_UDBENVELOPE	'i'	/* do udbsender rewriting on envelope */
+# define M_INTERNAL	'I'	/* SMTP to another sendmail site */
+# define M_UDBRECIPIENT	'j'	/* do udbsender rewriting on recipient lines */
+# define M_NOLOOPCHECK	'k'	/* don't check for loops in HELO command */
+# define M_CHUNKING	'K'	/* CHUNKING: reserved for future use */
+# define M_LOCALMAILER	'l'	/* delivery is to this host */
+# define M_LIMITS	'L'	/* must enforce SMTP line limits */
+# define M_MUSER	'm'	/* can handle multiple users at once */
+		/*	'M'	   CF: include Message-Id: */
+# define M_NHDR		'n'	/* don't insert From line */
+# define M_MANYSTATUS	'N'	/* MAIL11V3: DATA returns multi-status */
+# define M_RUNASRCPT	'o'	/* always run mailer as recipient */
+# define M_FROMPATH	'p'	/* use reverse-path in MAIL FROM: */
+		/*	'P'	   CF: include Return-Path: */
+# define M_VRFY250	'q'	/* VRFY command returns 250 instead of 252 */
+# define M_ROPT		'r'	/* mailer takes picky -r flag */
+# define M_SECURE_PORT	'R'	/* try to send on a reserved TCP port */
+# define M_STRIPQ	's'	/* strip quote chars from user/host */
+# define M_SPECIFIC_UID	'S'	/* run as specific uid/gid */
+# define M_USR_UPPER	'u'	/* preserve user case distinction */
+# define M_UGLYUUCP	'U'	/* this wants an ugly UUCP from line */
+# define M_CONTENT_LEN	'v'	/* add Content-Length: header (SVr4) */
+		/*	'V'	   UIUC: !-relativize all addresses */
+# define M_HASPWENT	'w'	/* check for /etc/passwd entry */
+		/*	'x'	   CF: include Full-Name: */
+# define M_XDOT		'X'	/* use hidden-dot algorithm */
+# define M_LMTP		'z'	/* run Local Mail Transport Protocol */
+# define M_NOMX		'0'	/* turn off MX lookups */
+# define M_NONULLS	'1'	/* don't send null bytes */
+# define M_EBCDIC	'3'	/* extend Q-P encoding for EBCDIC */
+# define M_TRYRULESET5	'5'	/* use ruleset 5 after local aliasing */
+# define M_7BITHDRS	'6'	/* strip headers to 7 bits even in 8 bit path */
+# define M_7BITS	'7'	/* use 7-bit path */
+# define M_8BITS	'8'	/* force "just send 8" behaviour */
+# define M_MAKE8BIT	'9'	/* convert 7 -> 8 bit if appropriate */
+# define M_CHECKINCLUDE	':'	/* check for :include: files */
+# define M_CHECKPROG	'|'	/* check for |program addresses */
+# define M_CHECKFILE	'/'	/* check for /file addresses */
+# define M_CHECKUDB	'@'	/* user can be user database key */
+# define M_CHECKHDIR	'~'	/* SGI: check for valid home directory */
+
+EXTERN MAILER	*Mailer[MAXMAILERS+1];
+
+EXTERN MAILER	*LocalMailer;		/* ptr to local mailer */
+EXTERN MAILER	*ProgMailer;		/* ptr to program mailer */
+EXTERN MAILER	*FileMailer;		/* ptr to *file* mailer */
+EXTERN MAILER	*InclMailer;		/* ptr to *include* mailer */
+/*
+**  Information about currently open connections to mailers, or to
+**  hosts that we have looked up recently.
+*/
+
+# define MCI		struct mailer_con_info
+
+MCI
+{
+	short		mci_flags;	/* flag bits, see below */
+	short		mci_errno;	/* error number on last connection */
+	short		mci_herrno;	/* h_errno from last DNS lookup */
+	short		mci_exitstat;	/* exit status from last connection */
+	short		mci_state;	/* SMTP state */
+	long		mci_maxsize;	/* max size this server will accept */
+	FILE		*mci_in;	/* input side of connection */
+	FILE		*mci_out;	/* output side of connection */
+	pid_t		mci_pid;	/* process id of subordinate proc */
+	char		*mci_phase;	/* SMTP phase string */
+	struct mailer	*mci_mailer;	/* ptr to the mailer for this conn */
+	char		*mci_host;	/* host name */
+	char		*mci_status;	/* DSN status to be copied to addrs */
+	char		*mci_rstatus;	/* SMTP status to be copied to addrs */
+	time_t		mci_lastuse;	/* last usage time */
+	FILE		*mci_statfile;	/* long term status file */
+};
+
+
+/* flag bits */
+#define MCIF_VALID	0x0001		/* this entry is valid */
+#define MCIF_TEMP	0x0002		/* don't cache this connection */
+#define MCIF_CACHED	0x0004		/* currently in open cache */
+#define MCIF_ESMTP	0x0008		/* this host speaks ESMTP */
+#define MCIF_EXPN	0x0010		/* EXPN command supported */
+#define MCIF_SIZE	0x0020		/* SIZE option supported */
+#define MCIF_8BITMIME	0x0040		/* BODY=8BITMIME supported */
+#define MCIF_7BIT	0x0080		/* strip this message to 7 bits */
+#define MCIF_MULTSTAT	0x0100		/* MAIL11V3: handles MULT status */
+#define MCIF_INHEADER	0x0200		/* currently outputing header */
+#define MCIF_CVT8TO7	0x0400		/* convert from 8 to 7 bits */
+#define MCIF_DSN	0x0800		/* DSN extension supported */
+#define MCIF_8BITOK	0x1000		/* OK to send 8 bit characters */
+#define MCIF_CVT7TO8	0x2000		/* convert from 7 to 8 bits */
+#define MCIF_INMIME	0x4000		/* currently reading MIME header */
+
+/* states */
+#define MCIS_CLOSED	0		/* no traffic on this connection */
+#define MCIS_OPENING	1		/* sending initial protocol */
+#define MCIS_OPEN	2		/* open, initial protocol sent */
+#define MCIS_ACTIVE	3		/* message being sent */
+#define MCIS_QUITING	4		/* running quit protocol */
+#define MCIS_SSD	5		/* service shutting down */
+#define MCIS_ERROR	6		/* I/O error on connection */
+
+/* functions */
+extern MCI	*mci_get __P((char *, MAILER *));
+extern void	mci_cache __P((MCI *));
+extern void	mci_flush __P((bool, MCI *));
+extern void	mci_dump __P((MCI *, bool));
+extern void	mci_dump_all __P((bool));
+extern MCI	**mci_scan __P((MCI *));
+extern int 	mci_traverse_persistent __P((int (), char *));
+extern int	mci_print_persistent __P((char *, char *));
+extern int	mci_purge_persistent __P((char *, char *));
+extern int	mci_lock_host __P((MCI *));
+extern void	mci_unlock_host __P((MCI *));
+extern int	mci_lock_host_statfile __P((MCI *));
+extern void 	mci_store_persistent __P((MCI *));
+extern int 	mci_read_persistent __P((FILE *, MCI *));
+/*
+**  Header structure.
+**	This structure is used internally to store header items.
+*/
+
+struct header
+{
+	char		*h_field;	/* the name of the field */
+	char		*h_value;	/* the value of that field */
+	struct header	*h_link;	/* the next header */
+	u_short		h_flags;	/* status bits, see below */
+	BITMAP		h_mflags;	/* m_flags bits needed */
+};
+
+typedef struct header	HDR;
+
+/*
+**  Header information structure.
+**	Defined in conf.c, this struct declares the header fields
+**	that have some magic meaning.
+*/
+
+struct hdrinfo
+{
+	char	*hi_field;	/* the name of the field */
+	u_short	hi_flags;	/* status bits, see below */
+	char	*hi_ruleset;	/* validity check ruleset */
+};
+
+extern struct hdrinfo	HdrInfo[];
+
+/* bits for h_flags and hi_flags */
+# define H_EOH		0x0001	/* this field terminates header */
+# define H_RCPT		0x0002	/* contains recipient addresses */
+# define H_DEFAULT	0x0004	/* if another value is found, drop this */
+# define H_RESENT	0x0008	/* this address is a "Resent-..." address */
+# define H_CHECK	0x0010	/* check h_mflags against m_flags */
+# define H_ACHECK	0x0020	/* ditto, but always (not just default) */
+# define H_FORCE	0x0040	/* force this field, even if default */
+# define H_TRACE	0x0080	/* this field contains trace information */
+# define H_FROM		0x0100	/* this is a from-type field */
+# define H_VALID	0x0200	/* this field has a validated value */
+# define H_RECEIPTTO	0x0400	/* this field has return receipt info */
+# define H_ERRORSTO	0x0800	/* this field has error address info */
+# define H_CTE		0x1000	/* this field is a content-transfer-encoding */
+# define H_CTYPE	0x2000	/* this is a content-type field */
+# define H_BCC		0x4000	/* Bcc: header: strip value or delete */
+# define H_ENCODABLE	0x8000	/* field can be RFC 1522 encoded */
+
+/* functions */
+extern void	addheader __P((char *, char *, HDR **));
+extern char	*hvalue __P((char *, HDR *));
+extern void	commaize __P((HDR *, char *, bool, MCI *, ENVELOPE *));
+extern void	put_vanilla_header __P((HDR *, char *, MCI *));
+extern void	eatheader __P((ENVELOPE *, bool));
+extern int	chompheader __P((char *, bool, HDR **, ENVELOPE *));
+/*
+**  Envelope structure.
+**	This structure defines the message itself.  There is usually
+**	only one of these -- for the message that we originally read
+**	and which is our primary interest -- but other envelopes can
+**	be generated during processing.  For example, error messages
+**	will have their own envelope.
+*/
+
+struct envelope
+{
+	HDR		*e_header;	/* head of header list */
+	long		e_msgpriority;	/* adjusted priority of this message */
+	time_t		e_ctime;	/* time message appeared in the queue */
+	char		*e_to;		/* the target person */
+	ADDRESS		e_from;		/* the person it is from */
+	char		*e_sender;	/* e_from.q_paddr w comments stripped */
+	char		**e_fromdomain;	/* the domain part of the sender */
+	ADDRESS		*e_sendqueue;	/* list of message recipients */
+	ADDRESS		*e_errorqueue;	/* the queue for error responses */
+	long		e_msgsize;	/* size of the message in bytes */
+	long		e_flags;	/* flags, see below */
+	int		e_nrcpts;	/* number of recipients */
+	short		e_class;	/* msg class (priority, junk, etc.) */
+	short		e_hopcount;	/* number of times processed */
+	short		e_nsent;	/* number of sends since checkpoint */
+	short		e_sendmode;	/* message send mode */
+	short		e_errormode;	/* error return mode */
+	short		e_timeoutclass;	/* message timeout class */
+	void		(*e_puthdr)__P((MCI *, HDR *, ENVELOPE *));
+					/* function to put header of message */
+	void		(*e_putbody)__P((MCI *, ENVELOPE *, char *));
+					/* function to put body of message */
+	struct envelope	*e_parent;	/* the message this one encloses */
+	struct envelope *e_sibling;	/* the next envelope of interest */
+	char		*e_bodytype;	/* type of message body */
+	FILE		*e_dfp;		/* temporary file */
+	char		*e_id;		/* code for this entry in queue */
+	FILE		*e_xfp;		/* transcript file */
+	FILE		*e_lockfp;	/* the lock file for this message */
+	char		*e_message;	/* error message */
+	char		*e_statmsg;	/* stat msg (changes per delivery) */
+	char		*e_msgboundary;	/* MIME-style message part boundary */
+	char		*e_origrcpt;	/* original recipient (one only) */
+	char		*e_envid;	/* envelope id from MAIL FROM: line */
+	char		*e_status;	/* DSN status for this message */
+	time_t		e_dtime;	/* time of last delivery attempt */
+	int		e_ntries;	/* number of delivery attempts */
+	dev_t		e_dfdev;	/* df file's device, for crash recov */
+	ino_t		e_dfino;	/* df file's ino, for crash recovery */
+	char		*e_macro[256];	/* macro definitions */
+};
+
+/* values for e_flags */
+#define EF_OLDSTYLE	0x0000001	/* use spaces (not commas) in hdrs */
+#define EF_INQUEUE	0x0000002	/* this message is fully queued */
+#define EF_NO_BODY_RETN	0x0000004	/* omit message body on error */
+#define EF_CLRQUEUE	0x0000008	/* disk copy is no longer needed */
+#define EF_SENDRECEIPT	0x0000010	/* send a return receipt */
+#define EF_FATALERRS	0x0000020	/* fatal errors occured */
+#define EF_DELETE_BCC	0x0000040	/* delete Bcc: headers entirely */
+#define EF_RESPONSE	0x0000080	/* this is an error or return receipt */
+#define EF_RESENT	0x0000100	/* this message is being forwarded */
+#define EF_VRFYONLY	0x0000200	/* verify only (don't expand aliases) */
+#define EF_WARNING	0x0000400	/* warning message has been sent */
+#define EF_QUEUERUN	0x0000800	/* this envelope is from queue */
+#define EF_GLOBALERRS	0x0001000	/* treat errors as global */
+#define EF_PM_NOTIFY	0x0002000	/* send return mail to postmaster */
+#define EF_METOO	0x0004000	/* send to me too */
+#define EF_LOGSENDER	0x0008000	/* need to log the sender */
+#define EF_NORECEIPT	0x0010000	/* suppress all return-receipts */
+#define EF_HAS8BIT	0x0020000	/* at least one 8-bit char in body */
+#define EF_NL_NOT_EOL	0x0040000	/* don't accept raw NL as EOLine */
+#define EF_CRLF_NOT_EOL	0x0080000	/* don't accept CR-LF as EOLine */
+#define EF_RET_PARAM	0x0100000	/* RCPT command had RET argument */
+#define EF_HAS_DF	0x0200000	/* set when df file is instantiated */
+#define EF_IS_MIME	0x0400000	/* really is a MIME message */
+#define EF_DONT_MIME	0x0800000	/* never MIME this message */
+
+EXTERN ENVELOPE	*CurEnv;	/* envelope currently being processed */
+
+/* functions */
+extern ENVELOPE	*newenvelope __P((ENVELOPE *, ENVELOPE *));
+extern void	dropenvelope __P((ENVELOPE *, bool));
+extern void	clearenvelope __P((ENVELOPE *, bool));
+
+extern void	putheader __P((MCI *, HDR *, ENVELOPE *));
+extern void	putbody __P((MCI *, ENVELOPE *, char *));
+/*
+**  Message priority classes.
+**
+**	The message class is read directly from the Priority: header
+**	field in the message.
+**
+**	CurEnv->e_msgpriority is the number of bytes in the message plus
+**	the creation time (so that jobs ``tend'' to be ordered correctly),
+**	adjusted by the message class, the number of recipients, and the
+**	amount of time the message has been sitting around.  This number
+**	is used to order the queue.  Higher values mean LOWER priority.
+**
+**	Each priority class point is worth WkClassFact priority points;
+**	each recipient is worth WkRecipFact priority points.  Each time
+**	we reprocess a message the priority is adjusted by WkTimeFact.
+**	WkTimeFact should normally decrease the priority so that jobs
+**	that have historically failed will be run later; thanks go to
+**	Jay Lepreau at Utah for pointing out the error in my thinking.
+**
+**	The "class" is this number, unadjusted by the age or size of
+**	this message.  Classes with negative representations will have
+**	error messages thrown away if they are not local.
+*/
+
+struct priority
+{
+	char	*pri_name;	/* external name of priority */
+	int	pri_val;	/* internal value for same */
+};
+
+EXTERN struct priority	Priorities[MAXPRIORITIES];
+EXTERN int		NumPriorities;	/* pointer into Priorities */
+/*
+**  Rewrite rules.
+*/
+
+struct rewrite
+{
+	char	**r_lhs;	/* pattern match */
+	char	**r_rhs;	/* substitution value */
+	struct rewrite	*r_next;/* next in chain */
+};
+
+EXTERN struct rewrite	*RewriteRules[MAXRWSETS];
+
+/*
+**  Special characters in rewriting rules.
+**	These are used internally only.
+**	The COND* rules are actually used in macros rather than in
+**		rewriting rules, but are given here because they
+**		cannot conflict.
+*/
+
+/* left hand side items */
+# define MATCHZANY	((u_char)0220)	/* match zero or more tokens */
+# define MATCHANY	((u_char)0221)	/* match one or more tokens */
+# define MATCHONE	((u_char)0222)	/* match exactly one token */
+# define MATCHCLASS	((u_char)0223)	/* match one token in a class */
+# define MATCHNCLASS	((u_char)0224)	/* match anything not in class */
+# define MATCHREPL	((u_char)0225)	/* replacement on RHS for above */
+
+/* right hand side items */
+# define CANONNET	((u_char)0226)	/* canonical net, next token */
+# define CANONHOST	((u_char)0227)	/* canonical host, next token */
+# define CANONUSER	((u_char)0230)	/* canonical user, next N tokens */
+# define CALLSUBR	((u_char)0231)	/* call another rewriting set */
+
+/* conditionals in macros */
+# define CONDIF		((u_char)0232)	/* conditional if-then */
+# define CONDELSE	((u_char)0233)	/* conditional else */
+# define CONDFI		((u_char)0234)	/* conditional fi */
+
+/* bracket characters for host name lookup */
+# define HOSTBEGIN	((u_char)0235)	/* hostname lookup begin */
+# define HOSTEND	((u_char)0236)	/* hostname lookup end */
+
+/* bracket characters for generalized lookup */
+# define LOOKUPBEGIN	((u_char)0205)	/* generalized lookup begin */
+# define LOOKUPEND	((u_char)0206)	/* generalized lookup end */
+
+/* macro substitution character */
+# define MACROEXPAND	((u_char)0201)	/* macro expansion */
+# define MACRODEXPAND	((u_char)0202)	/* deferred macro expansion */
+
+/* to make the code clearer */
+# define MATCHZERO	CANONHOST
+
+/* external <==> internal mapping table */
+struct metamac
+{
+	char	metaname;	/* external code (after $) */
+	u_char	metaval;	/* internal code (as above) */
+};
+
+/* values for macros with external names only */
+# define MID_OPMODE	0202	/* operation mode */
+
+/* functions */
+extern void	expand __P((char *, char *, size_t, ENVELOPE *));
+extern void	define __P((int, char *, ENVELOPE *));
+extern char	*macvalue __P((int, ENVELOPE *));
+extern char	*macname __P((int));
+extern int	macid __P((char *, char **));
+/*
+**  Name canonification short circuit.
+**
+**	If the name server for a host is down, the process of trying to
+**	canonify the name can hang.  This is similar to (but alas, not
+**	identical to) looking up the name for delivery.  This stab type
+**	caches the result of the name server lookup so we don't hang
+**	multiple times.
+*/
+
+#define NAMECANON	struct _namecanon
+
+NAMECANON
+{
+	short		nc_errno;	/* cached errno */
+	short		nc_herrno;	/* cached h_errno */
+	short		nc_stat;	/* cached exit status code */
+	short		nc_flags;	/* flag bits */
+	char		*nc_cname;	/* the canonical name */
+};
+
+/* values for nc_flags */
+#define NCF_VALID	0x0001	/* entry valid */
+/*
+**  Mapping functions
+**
+**	These allow arbitrary mappings in the config file.  The idea
+**	(albeit not the implementation) comes from IDA sendmail.
+*/
+
+# define MAPCLASS	struct _mapclass
+# define MAP		struct _map
+# define MAXMAPACTIONS	3		/* size of map_actions array */
+
+
+/*
+**  An actual map.
+*/
+
+MAP
+{
+	MAPCLASS	*map_class;	/* the class of this map */
+	char		*map_mname;	/* name of this map */
+	long		map_mflags;	/* flags, see below */
+	char		*map_file;	/* the (nominal) filename */
+	ARBPTR_T	map_db1;	/* the open database ptr */
+	ARBPTR_T	map_db2;	/* an "extra" database pointer */
+	char		*map_keycolnm;	/* key column name */
+	char		*map_valcolnm;	/* value column name */
+	u_char		map_keycolno;	/* key column number */
+	u_char		map_valcolno;	/* value column number */
+	char		map_coldelim;	/* column delimiter */
+	char		*map_app;	/* to append to successful matches */
+	char		*map_domain;	/* the (nominal) NIS domain */
+	char		*map_rebuild;	/* program to run to do auto-rebuild */
+	time_t		map_mtime;	/* last database modification time */
+	int		map_lockfd;	/* auxiliary lock file descriptor */
+	short		map_specificity;	/* specificity of aliases */
+	MAP		*map_stack[MAXMAPSTACK];   /* list for stacked maps */
+	short		map_return[MAXMAPACTIONS]; /* return bitmaps for stacked maps */
+};
+
+/* bit values for map_mflags */
+# define MF_VALID	0x00000001	/* this entry is valid */
+# define MF_INCLNULL	0x00000002	/* include null byte in key */
+# define MF_OPTIONAL	0x00000004	/* don't complain if map not found */
+# define MF_NOFOLDCASE	0x00000008	/* don't fold case in keys */
+# define MF_MATCHONLY	0x00000010	/* don't use the map value */
+# define MF_OPEN	0x00000020	/* this entry is open */
+# define MF_WRITABLE	0x00000040	/* open for writing */
+# define MF_ALIAS	0x00000080	/* this is an alias file */
+# define MF_TRY0NULL	0x00000100	/* try with no null byte */
+# define MF_TRY1NULL	0x00000200	/* try with the null byte */
+# define MF_LOCKED	0x00000400	/* this map is currently locked */
+# define MF_ALIASWAIT	0x00000800	/* alias map in aliaswait state */
+# define MF_IMPL_HASH	0x00001000	/* implicit: underlying hash database */
+# define MF_IMPL_NDBM	0x00002000	/* implicit: underlying NDBM database */
+# define MF_UNSAFEDB	0x00004000	/* this map is world writable */
+# define MF_APPEND	0x00008000	/* append new entry on rebuiled */
+# define MF_KEEPQUOTES	0x00010000	/* don't dequote key before lookup */
+# define MF_NODEFER	0x00020000	/* don't defer if map lookup fails */
+
+/* indices for map_actions */
+# define MA_NOTFOUND	0		/* member map returned "not found" */
+# define MA_UNAVAIL	1		/* member map is not available */
+# define MA_TRYAGAIN	2		/* member map returns temp failure */
+
+/*
+**  The class of a map -- essentially the functions to call
+*/
+
+MAPCLASS
+{
+	char	*map_cname;		/* name of this map class */
+	char	*map_ext;		/* extension for database file */
+	short	map_cflags;		/* flag bits, see below */
+	bool	(*map_parse)__P((MAP *, char *));
+					/* argument parsing function */
+	char	*(*map_lookup)__P((MAP *, char *, char **, int *));
+					/* lookup function */
+	void	(*map_store)__P((MAP *, char *, char *));
+					/* store function */
+	bool	(*map_open)__P((MAP *, int));
+					/* open function */
+	void	(*map_close)__P((MAP *));
+					/* close function */
+};
+
+/* bit values for map_cflags */
+#define MCF_ALIASOK	0x0001		/* can be used for aliases */
+#define MCF_ALIASONLY	0x0002		/* usable only for aliases */
+#define MCF_REBUILDABLE	0x0004		/* can rebuild alias files */
+#define MCF_OPTFILE	0x0008		/* file name is optional */
+
+/* functions */
+extern char	*map_rewrite __P((MAP *, const char *, int, char **));
+extern MAP	*makemapentry __P((char *));
+extern void	initmaps __P((bool, ENVELOPE *));
+/*
+**  Symbol table definitions
+*/
+
+struct symtab
+{
+	char		*s_name;	/* name to be entered */
+	short		s_type;		/* general type (see below) */
+	short		s_len;		/* length of this entry */
+	struct symtab	*s_next;	/* pointer to next in chain */
+	union
+	{
+		BITMAP		sv_class;	/* bit-map of word classes */
+		ADDRESS		*sv_addr;	/* pointer to address header */
+		MAILER		*sv_mailer;	/* pointer to mailer */
+		char		*sv_alias;	/* alias */
+		MAPCLASS	sv_mapclass;	/* mapping function class */
+		MAP		sv_map;		/* mapping function */
+		char		*sv_hostsig;	/* host signature */
+		MCI		sv_mci;		/* mailer connection info */
+		NAMECANON	sv_namecanon;	/* canonical name cache */
+		int		sv_macro;	/* macro name => id mapping */
+		int		sv_ruleset;	/* ruleset index */
+		struct hdrinfo	sv_header;	/* header metainfo */
+		char		*sv_service[MAXMAPSTACK]; /* service switch */
+	}	s_value;
+};
+
+typedef struct symtab	STAB;
+
+/* symbol types */
+# define ST_UNDEF	0	/* undefined type */
+# define ST_CLASS	1	/* class map */
+# define ST_ADDRESS	2	/* an address in parsed format */
+# define ST_MAILER	3	/* a mailer header */
+# define ST_ALIAS	4	/* an alias */
+# define ST_MAPCLASS	5	/* mapping function class */
+# define ST_MAP		6	/* mapping function */
+# define ST_HOSTSIG	7	/* host signature */
+# define ST_NAMECANON	8	/* cached canonical name */
+# define ST_MACRO	9	/* macro name to id mapping */
+# define ST_RULESET	10	/* ruleset index */
+# define ST_SERVICE	11	/* service switch entry */
+# define ST_HEADER	12	/* special header flags */
+# define ST_MCI		16	/* mailer connection info (offset) */
+
+# define s_class	s_value.sv_class
+# define s_address	s_value.sv_addr
+# define s_mailer	s_value.sv_mailer
+# define s_alias	s_value.sv_alias
+# define s_mci		s_value.sv_mci
+# define s_mapclass	s_value.sv_mapclass
+# define s_hostsig	s_value.sv_hostsig
+# define s_map		s_value.sv_map
+# define s_namecanon	s_value.sv_namecanon
+# define s_macro	s_value.sv_macro
+# define s_ruleset	s_value.sv_ruleset
+# define s_service	s_value.sv_service
+# define s_header	s_value.sv_header
+
+extern STAB		*stab __P((char *, int, int));
+extern void		stabapply __P((void (*)(STAB *, int), int));
+
+/* opcodes to stab */
+# define ST_FIND	0	/* find entry */
+# define ST_ENTER	1	/* enter if not there */
+/*
+**  STRUCT EVENT -- event queue.
+**
+**	Maintained in sorted order.
+**
+**	We store the pid of the process that set this event to insure
+**	that when we fork we will not take events intended for the parent.
+*/
+
+struct event
+{
+	time_t		ev_time;	/* time of the function call */
+	void		(*ev_func)__P((int));
+					/* function to call */
+	int		ev_arg;		/* argument to ev_func */
+	int		ev_pid;		/* pid that set this event */
+	struct event	*ev_link;	/* link to next item */
+};
+
+typedef struct event	EVENT;
+
+EXTERN EVENT	*EventQueue;		/* head of event queue */
+
+/* functions */
+extern EVENT	*setevent __P((time_t, void(*)(), int));
+extern void	clrevent __P((EVENT *));
+/*
+**  Operation, send, error, and MIME modes
+**
+**	The operation mode describes the basic operation of sendmail.
+**	This can be set from the command line, and is "send mail" by
+**	default.
+**
+**	The send mode tells how to send mail.  It can be set in the
+**	configuration file.  It's setting determines how quickly the
+**	mail will be delivered versus the load on your system.  If the
+**	-v (verbose) flag is given, it will be forced to SM_DELIVER
+**	mode.
+**
+**	The error mode tells how to return errors.
+*/
+
+EXTERN char	OpMode;		/* operation mode, see below */
+
+#define MD_DELIVER	'm'		/* be a mail sender */
+#define MD_SMTP		's'		/* run SMTP on standard input */
+#define MD_ARPAFTP	'a'		/* obsolete ARPANET mode (Grey Book) */
+#define MD_DAEMON	'd'		/* run as a daemon */
+#define MD_FGDAEMON	'D'		/* run daemon in foreground */
+#define MD_VERIFY	'v'		/* verify: don't collect or deliver */
+#define MD_TEST		't'		/* test mode: resolve addrs only */
+#define MD_INITALIAS	'i'		/* initialize alias database */
+#define MD_PRINT	'p'		/* print the queue */
+#define MD_FREEZE	'z'		/* freeze the configuration file */
+#define MD_HOSTSTAT	'h'		/* print persistent host stat info */
+#define MD_PURGESTAT	'H'		/* purge persistent host stat info */
+
+/* values for e_sendmode -- send modes */
+#define SM_DELIVER	'i'		/* interactive delivery */
+#define SM_FORK		'b'		/* deliver in background */
+#define SM_QUEUE	'q'		/* queue, don't deliver */
+#define SM_DEFER	'd'		/* defer map lookups as well as queue */
+#define SM_VERIFY	'v'		/* verify only (used internally) */
+
+/* used only as a parameter to sendall */
+#define SM_DEFAULT	'\0'		/* unspecified, use SendMode */
+
+
+/* values for e_errormode -- error handling modes */
+#define EM_PRINT	'p'		/* print errors */
+#define EM_MAIL		'm'		/* mail back errors */
+#define EM_WRITE	'w'		/* write back errors */
+#define EM_BERKNET	'e'		/* special berknet processing */
+#define EM_QUIET	'q'		/* don't print messages (stat only) */
+
+
+/* MIME processing mode */
+EXTERN int	MimeMode;
+
+/* bit values for MimeMode */
+#define MM_CVTMIME	0x0001		/* convert 8 to 7 bit MIME */
+#define MM_PASS8BIT	0x0002		/* just send 8 bit data blind */
+#define MM_MIME8BIT	0x0004		/* convert 8-bit data to MIME */
+
+/* queue sorting order algorithm */
+EXTERN int	QueueSortOrder;
+
+#define QS_BYPRIORITY	0		/* sort by message priority */
+#define QS_BYHOST	1		/* sort by first host name */
+#define QS_BYTIME	2		/* sort by submission time */
+
+
+/* how to handle messages without any recipient addresses */
+EXTERN int		NoRecipientAction;
+
+#define NRA_NO_ACTION		0	/* just leave it as is */
+#define NRA_ADD_TO		1	/* add To: header */
+#define NRA_ADD_APPARENTLY_TO	2	/* add Apparently-To: header */
+#define NRA_ADD_BCC		3	/* add empty Bcc: header */
+#define NRA_ADD_TO_UNDISCLOSED	4	/* add To: undisclosed:; header */
+
+
+/* flags to putxline */
+#define PXLF_NOTHINGSPECIAL	0	/* no special mapping */
+#define PXLF_MAPFROM		0x0001	/* map From_ to >From_ */
+#define PXLF_STRIP8BIT		0x0002	/* strip 8th bit */
+#define PXLF_HEADER		0x0004	/* map newlines in headers */
+/*
+**  Additional definitions
+*/
+
+
+/*
+**  Privacy flags
+**	These are bit values for the PrivacyFlags word.
+*/
+
+#define PRIV_PUBLIC		0	/* what have I got to hide? */
+#define PRIV_NEEDMAILHELO	0x0001	/* insist on HELO for MAIL, at least */
+#define PRIV_NEEDEXPNHELO	0x0002	/* insist on HELO for EXPN */
+#define PRIV_NEEDVRFYHELO	0x0004	/* insist on HELO for VRFY */
+#define PRIV_NOEXPN		0x0008	/* disallow EXPN command entirely */
+#define PRIV_NOVRFY		0x0010	/* disallow VRFY command entirely */
+#define PRIV_AUTHWARNINGS	0x0020	/* flag possible authorization probs */
+#define PRIV_NORECEIPTS		0x0040	/* disallow return receipts */
+#define PRIV_NOETRN		0x0080	/* disallow ETRN command entirely */
+#define PRIV_RESTRICTMAILQ	0x1000	/* restrict mailq command */
+#define PRIV_RESTRICTQRUN	0x2000	/* restrict queue run */
+#define PRIV_GOAWAY		0x0fff	/* don't give no info, anyway, anyhow */
+
+/* struct defining such things */
+struct prival
+{
+	char	*pv_name;	/* name of privacy flag */
+	int	pv_flag;	/* numeric level */
+};
+
+
+/*
+**  Flags passed to remotename, parseaddr, allocaddr, and buildaddr.
+*/
+
+#define RF_SENDERADDR		0x001	/* this is a sender address */
+#define RF_HEADERADDR		0x002	/* this is a header address */
+#define RF_CANONICAL		0x004	/* strip comment information */
+#define RF_ADDDOMAIN		0x008	/* OK to do domain extension */
+#define RF_COPYPARSE		0x010	/* copy parsed user & host */
+#define RF_COPYPADDR		0x020	/* copy print address */
+#define RF_COPYALL		(RF_COPYPARSE|RF_COPYPADDR)
+#define RF_COPYNONE		0
+
+
+/*
+**  Flags passed to safefile/safedirpath.
+*/
+
+#define SFF_ANYFILE		0	/* no special restrictions */
+#define SFF_MUSTOWN		0x0001	/* user must own this file */
+#define SFF_NOSLINK		0x0002	/* file cannot be a symbolic link */
+#define SFF_ROOTOK		0x0004	/* ok for root to own this file */
+#define SFF_RUNASREALUID	0x0008	/* if no ctladdr, run as real uid */
+#define SFF_NOPATHCHECK		0x0010	/* don't bother checking dir path */
+#define SFF_SETUIDOK		0x0020	/* setuid files are ok */
+#define SFF_CREAT		0x0040	/* ok to create file if necessary */
+#define SFF_REGONLY		0x0080	/* regular files only */
+#define SFF_SAFEDIRPATH		0x0100	/* no writable directories allowed */
+#define SFF_NOHLINK		0x0200	/* file cannot have hard links */
+#define SFF_NOWLINK		0x0400	/* links only in non-writable dirs */
+#define SFF_NOWFILES		0x0800	/* disallow world writable files */
+
+/* flags that are actually specific to safeopen/safefopen/dfopen */
+#define SFF_OPENASROOT		0x1000	/* open as root instead of real user */
+#define SFF_NOLOCK		0x2000	/* don't lock the file */
+
+/* pseudo-flags */
+#define SFF_NOLINK		(SFF_NOHLINK|SFF_NOSLINK)
+
+/* functions */
+extern int	safefile __P((char *, UID_T, GID_T, char *, int, int, struct stat *));
+extern int	safedirpath __P((char *, UID_T, GID_T, char *, int));
+extern int	safeopen __P((char *, int, int, int));
+extern FILE	*safefopen __P((char *, int, int, int));
+extern int	dfopen __P((char *, int, int, int));
+extern bool	filechanged __P((char *, int, struct stat *, int));
+
+
+/*
+**  Flags passed to mime8to7.
+*/
+
+#define M87F_OUTER		0	/* outer context */
+#define M87F_NO8BIT		0x0001	/* can't have 8-bit in this section */
+#define M87F_DIGEST		0x0002	/* processing multipart/digest */
+
+
+/*
+**  Flags passed to returntosender.
+*/
+
+#define RTSF_NO_BODY		0	/* send headers only */
+#define RTSF_SEND_BODY		0x0001	/* include body of message in return */
+#define RTSF_PM_BOUNCE		0x0002	/* this is a postmaster bounce */
+
+
+/*
+**  Regular UNIX sockaddrs are too small to handle ISO addresses, so
+**  we are forced to declare a supertype here.
+*/
+
+# if NETINET || NETUNIX || NETISO || NETNS || NETX25
+union bigsockaddr
+{
+	struct sockaddr		sa;	/* general version */
+#if NETUNIX
+	struct sockaddr_un	sunix;	/* UNIX family */
+#endif
+#if NETINET
+	struct sockaddr_in	sin;	/* INET family */
+#endif
+#if NETISO
+	struct sockaddr_iso	siso;	/* ISO family */
+#endif
+#if NETNS
+	struct sockaddr_ns	sns;	/* XNS family */
+#endif
+#if NETX25
+	struct sockaddr_x25	sx25;	/* X.25 family */
+#endif
+};
+
+#define SOCKADDR	union bigsockaddr
+
+EXTERN SOCKADDR RealHostAddr;	/* address of host we are talking to */
+
+extern char	*hostnamebyanyaddr __P((SOCKADDR *));
+extern char	*anynet_ntoa __P((SOCKADDR *));
+# if DAEMON
+extern bool	validate_connection __P((SOCKADDR *, char *, ENVELOPE *));
+# endif
+
+#endif
+
+
+/*
+**  Vendor codes
+**
+**	Vendors can customize sendmail to add special behaviour,
+**	generally for back compatibility.  Ideally, this should
+**	be set up in the .cf file using the "V" command.  However,
+**	it's quite reasonable for some vendors to want the default
+**	be their old version; this can be set using
+**		-DVENDOR_DEFAULT=VENDOR_xxx
+**	in the Makefile.
+**
+**	Vendors should apply to sendmail@CS.Berkeley.EDU for
+**	unique vendor codes.
+*/
+
+#define VENDOR_BERKELEY	1	/* Berkeley-native configuration file */
+#define VENDOR_SUN	2	/* Sun-native configuration file */
+#define VENDOR_HP	3	/* Hewlett-Packard specific config syntax */
+#define VENDOR_IBM	4	/* IBM specific config syntax */
+
+EXTERN int	VendorCode;	/* vendor-specific operation enhancements */
+
+/* prototypes for vendor-specific hook routines */
+extern void	vendor_set_uid __P((UID_T));
+extern void	vendor_daemon_setup __P((ENVELOPE *));
+
+
+/*
+**  Terminal escape codes.
+**
+**	To make debugging output clearer.
+*/
+
+struct termescape
+{
+	char	*te_rv_on;	/* turn reverse-video on */
+	char	*te_rv_off;	/* turn reverse-video off */
+};
+
+EXTERN struct termescape	TermEscape;
+
+
+/*
+**  Error return from inet_addr(3), in case not defined in /usr/include.
+*/
+
+#ifndef INADDR_NONE
+# define INADDR_NONE	0xffffffff
+#endif
+/*
+**  Global variables.
+*/
+
+EXTERN bool	FromFlag;	/* if set, "From" person is explicit */
+EXTERN bool	MeToo;		/* send to the sender also */
+EXTERN bool	IgnrDot;	/* don't let dot end messages */
+EXTERN bool	SaveFrom;	/* save leading "From" lines */
+EXTERN bool	GrabTo;		/* if set, get recipients from msg */
+EXTERN bool	SuprErrs;	/* set if we are suppressing errors */
+EXTERN bool	HoldErrs;	/* only output errors to transcript */
+EXTERN bool	NoConnect;	/* don't connect to non-local mailers */
+EXTERN bool	SuperSafe;	/* be extra careful, even if expensive */
+EXTERN bool	ForkQueueRuns;	/* fork for each job when running the queue */
+EXTERN bool	AutoRebuild;	/* auto-rebuild the alias database as needed */
+EXTERN bool	CheckAliases;	/* parse addresses during newaliases */
+EXTERN bool	NoAlias;	/* suppress aliasing */
+EXTERN bool	UseNameServer;	/* using DNS -- interpret h_errno & MX RRs */
+EXTERN bool	UseHesiod;	/* using Hesiod -- interpret Hesiod errors */
+EXTERN bool	SevenBitInput;	/* force 7-bit data on input */
+EXTERN bool	HasEightBits;	/* has at least one eight bit input byte */
+EXTERN bool	ConfigFileRead;	/* configuration file has been read */
+EXTERN time_t	SafeAlias;	/* interval to wait until @:@ in alias file */
+EXTERN FILE	*InChannel;	/* input connection */
+EXTERN FILE	*OutChannel;	/* output connection */
+EXTERN char	*RealUserName;	/* real user name of caller */
+EXTERN uid_t	RealUid;	/* real uid of caller */
+EXTERN gid_t	RealGid;	/* real gid of caller */
+EXTERN uid_t	DefUid;		/* default uid to run as */
+EXTERN gid_t	DefGid;		/* default gid to run as */
+EXTERN char	*DefUser;	/* default user to run as (from DefUid) */
+EXTERN MODE_T	OldUmask;	/* umask when sendmail starts up */
+EXTERN int	Verbose;	/* set if blow-by-blow desired */
+EXTERN int	Errors;		/* set if errors (local to single pass) */
+EXTERN int	ExitStat;	/* exit status code */
+EXTERN int	LineNumber;	/* line number in current input */
+EXTERN int	LogLevel;	/* level of logging to perform */
+EXTERN int	FileMode;	/* mode on files */
+EXTERN int	QueueLA;	/* load average starting forced queueing */
+EXTERN int	RefuseLA;	/* load average refusing connections are */
+EXTERN int	CurrentLA;	/* current load average */
+EXTERN long	QueueFactor;	/* slope of queue function */
+EXTERN time_t	QueueIntvl;	/* intervals between running the queue */
+EXTERN char	*HelpFile;	/* location of SMTP help file */
+EXTERN char	*ErrMsgFile;	/* file to prepend to all error messages */
+EXTERN char	*StatFile;	/* location of statistics summary */
+EXTERN char	*QueueDir;	/* location of queue directory */
+EXTERN char	*FileName;	/* name to print on error messages */
+EXTERN char	*SmtpPhase;	/* current phase in SMTP processing */
+EXTERN char	*MyHostName;	/* name of this host for SMTP messages */
+EXTERN char	*RealHostName;	/* name of host we are talking to */
+EXTERN char	*CurHostName;	/* current host we are dealing with */
+EXTERN jmp_buf	TopFrame;	/* branch-to-top-of-loop-on-error frame */
+EXTERN bool	QuickAbort;	/*  .... but only if we want a quick abort */
+EXTERN bool	OnlyOneError;	/*  .... or only want to give one SMTP reply */
+EXTERN bool	LogUsrErrs;	/* syslog user errors (e.g., SMTP RCPT cmd) */
+EXTERN bool	SendMIMEErrors;	/* send error messages in MIME format */
+EXTERN bool	MatchGecos;	/* look for user names in gecos field */
+EXTERN bool	UseErrorsTo;	/* use Errors-To: header (back compat) */
+EXTERN bool	TryNullMXList;	/* if we are the best MX, try host directly */
+EXTERN bool	InChild;	/* true if running in an SMTP subprocess */
+EXTERN bool	DisConnected;	/* running with OutChannel redirected to xf */
+EXTERN bool	ColonOkInAddr;	/* single colon legal in address */
+EXTERN bool	HasWildcardMX;	/* don't use MX records when canonifying */
+EXTERN char	SpaceSub;	/* substitution for <lwsp> */
+EXTERN int	PrivacyFlags;	/* privacy flags */
+EXTERN char	*ConfFile;	/* location of configuration file [conf.c] */
+EXTERN char	*PidFile;	/* location of proc id file [conf.c] */
+extern ADDRESS	NullAddress;	/* a null (template) address [main.c] */
+EXTERN long	WkClassFact;	/* multiplier for message class -> priority */
+EXTERN long	WkRecipFact;	/* multiplier for # of recipients -> priority */
+EXTERN long	WkTimeFact;	/* priority offset each time this job is run */
+EXTERN char	*UdbSpec;	/* user database source spec */
+EXTERN int	MaxHopCount;	/* max # of hops until bounce */
+EXTERN int	ConfigLevel;	/* config file level */
+EXTERN char	*TimeZoneSpec;	/* override time zone specification */
+EXTERN char	*ForwardPath;	/* path to search for .forward files */
+EXTERN long	MinBlocksFree;	/* min # of blocks free on queue fs */
+EXTERN char	*FallBackMX;	/* fall back MX host */
+EXTERN long	MaxMessageSize;	/* advertised max size we will accept */
+EXTERN time_t	MinQueueAge;	/* min delivery interval */
+EXTERN time_t	DialDelay;	/* delay between dial-on-demand tries */
+EXTERN char	*SafeFileEnv;	/* chroot location for file delivery */
+EXTERN char	*HostsFile;	/* path to /etc/hosts file */
+EXTERN char	*HostStatDir;	/* location of host status information */
+EXTERN int	MaxQueueRun;	/* maximum number of jobs in one queue run */
+EXTERN int	MaxChildren;	/* maximum number of daemonic children */
+EXTERN int	CurChildren;	/* current number of daemonic children */
+EXTERN char	*SmtpGreeting;	/* SMTP greeting message (old $e macro) */
+EXTERN char	*UnixFromLine;	/* UNIX From_ line (old $l macro) */
+EXTERN char	*OperatorChars;	/* operators (old $o macro) */
+EXTERN bool	DontInitGroups;	/* avoid initgroups() because of NIS cost */
+EXTERN int	DefaultNotify;	/* default DSN notification flags */
+EXTERN bool	AllowBogusHELO;	/* allow syntax errors on HELO command */
+EXTERN bool	UserSubmission;	/* initial (user) mail submission */
+EXTERN char	*RunAsUserName;	/* user to become for bulk of run */
+EXTERN uid_t	RunAsUid;	/* UID to become for bulk of run */
+EXTERN gid_t	RunAsGid;	/* GID to become for bulk of run */
+EXTERN int	MaxRcptPerMsg;	/* max recipients per SMTP message */
+EXTERN bool	DoQueueRun;	/* non-interrupt time queue run needed */
+#if _FFR_DSN_RRT_OPTION
+EXTERN bool	RrtImpliesDsn;	/* turn Return-Receipt-To: into DSN */
+#endif
+EXTERN char	*DeadLetterDrop;	/* path to dead letter office */
+EXTERN bool	DontProbeInterfaces;	/* don't probe interfaces for names */
+EXTERN bool	ChownAlwaysSafe;	/* treat chown(2) as safe */
+EXTERN bool	IgnoreHostStatus;	/* ignore long term host status files */
+EXTERN bool	SingleThreadDelivery;	/* single thread hosts on delivery */
+EXTERN bool	UnsafeGroupWrites;	/* group-writable files are unsafe */
+EXTERN bool	SingleLineFromHeader;	/* force From: header to be one line */
+EXTERN bool	DontLockReadFiles;	/* don't read lock support files */
+EXTERN int	ConnRateThrottle;	/* throttle for SMTP connection rate */
+EXTERN int	MaxAliasRecursion;	/* maximum depth of alias recursion */
+EXTERN int	MaxMacroRecursion;	/* maximum depth of macro recursion */
+EXTERN int	MaxRuleRecursion;	/* maximum depth of ruleset recursion */
+EXTERN char	*MustQuoteChars;	/* quote these characters in phrases */
+EXTERN char	*ServiceSwitchFile;	/* backup service switch */
+EXTERN char	*DefaultCharSet;	/* default character set for MIME */
+EXTERN char	*PostMasterCopy;	/* address to get errs cc's */
+EXTERN int	CheckpointInterval;	/* queue file checkpoint interval */
+EXTERN bool	DontPruneRoutes;	/* don't prune source routes */
+EXTERN bool	DontExpandCnames;	/* do not $[...$] expand CNAMEs */
+EXTERN int	MaxMciCache;		/* maximum entries in MCI cache */
+EXTERN time_t	ServiceCacheTime;	/* time service switch was cached */
+EXTERN time_t	ServiceCacheMaxAge;	/* refresh interval for cache */
+EXTERN time_t	MciCacheTimeout;	/* maximum idle time on connections */
+EXTERN time_t	MciInfoTimeout;		/* how long 'til we retry down hosts */
+EXTERN char	*QueueLimitRecipient;	/* limit queue runs to this recipient */
+EXTERN char	*QueueLimitSender;	/* limit queue runs to this sender */
+EXTERN char	*QueueLimitId;		/* limit queue runs to this id */
+EXTERN FILE	*TrafficLogFile;	/* file in which to log all traffic */
+EXTERN char	*DoubleBounceAddr;	/* where to send double bounces */
+EXTERN bool	FatalWritableDirs;	/* no writable dirs in map paths */
+EXTERN char	**ExternalEnviron;	/* input environment */
+EXTERN char	*UserEnviron[MAXUSERENVIRON + 1];
+					/* saved user environment */
+extern int	errno;
+
+
+/*
+**  Timeouts
+**
+**	Indicated values are the MINIMUM per RFC 1123 section 5.3.2.
+*/
+
+EXTERN struct
+{
+			/* RFC 1123-specified timeouts [minimum value] */
+	time_t	to_initial;	/* initial greeting timeout [5m] */
+	time_t	to_mail;	/* MAIL command [5m] */
+	time_t	to_rcpt;	/* RCPT command [5m] */
+	time_t	to_datainit;	/* DATA initiation [2m] */
+	time_t	to_datablock;	/* DATA block [3m] */
+	time_t	to_datafinal;	/* DATA completion [10m] */
+	time_t	to_nextcommand;	/* next command [5m] */
+			/* following timeouts are not mentioned in RFC 1123 */
+	time_t	to_iconnect;	/* initial connection timeout (first try) */
+	time_t	to_connect;	/* initial connection timeout (later tries) */
+	time_t	to_rset;	/* RSET command */
+	time_t	to_helo;	/* HELO command */
+	time_t	to_quit;	/* QUIT command */
+	time_t	to_miscshort;	/* misc short commands (NOOP, VERB, etc) */
+	time_t	to_ident;	/* IDENT protocol requests */
+	time_t	to_fileopen;	/* opening :include: and .forward files */
+			/* following are per message */
+	time_t	to_q_return[MAXTOCLASS];	/* queue return timeouts */
+	time_t	to_q_warning[MAXTOCLASS];	/* queue warning timeouts */
+} TimeOuts;
+
+/* timeout classes for return and warning timeouts */
+# define TOC_NORMAL	0	/* normal delivery */
+# define TOC_URGENT	1	/* urgent delivery */
+# define TOC_NONURGENT	2	/* non-urgent delivery */
+
+
+/*
+**  Trace information
+*/
+
+/* trace vector and macros for debugging flags */
+EXTERN u_char	tTdvect[100];
+# define tTd(flag, level)	(tTdvect[flag] >= level)
+# define tTdlevel(flag)		(tTdvect[flag])
+/*
+**  Miscellaneous information.
+*/
+
+
+/*
+**  The "no queue id" queue id for sm_syslog
+*/
+
+#define NOQID		"*~*"
+
+
+/*
+**  Some in-line functions
+*/
+
+/* set exit status */
+#define setstat(s)	{ \
+				if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \
+					ExitStat = s; \
+			}
+
+/* make a copy of a string */
+#define newstr(s)	strcpy(xalloc(strlen(s) + 1), s)
+
+#define STRUCTCOPY(s, d)	d = s
+
+
+
+/*
+**  Declarations of useful functions
+*/
+
+extern char	*xalloc __P((int));
+extern char	*sfgets __P((char *, int, FILE *, time_t, char *));
+extern char	*queuename __P((ENVELOPE *, int));
+extern time_t	curtime __P(());
+extern bool	transienterror __P((int));
+extern char	*fgetfolded __P((char *, int, FILE *));
+extern char	*username __P(());
+extern char	*pintvl __P((time_t, bool));
+extern bool	shouldqueue __P((long, time_t));
+extern bool	lockfile __P((int, char *, char *, int));
+extern char	*hostsignature __P((MAILER *, char *, ENVELOPE *));
+extern void	openxscript __P((ENVELOPE *));
+extern void	closexscript __P((ENVELOPE *));
+extern char	*shortenstring __P((const char *, int));
+extern bool	usershellok __P((char *, char *));
+extern char	*defcharset __P((ENVELOPE *));
+extern bool	wordinclass __P((char *, int));
+extern char	*denlstring __P((char *, bool, bool));
+extern void	makelower __P((char *));
+extern void	rebuildaliases __P((MAP *, bool));
+extern void	readaliases __P((MAP *, FILE *, bool, bool));
+extern void	finis __P(());
+extern void	setsender __P((char *, ENVELOPE *, char **, int, bool));
+extern void	xputs __P((const char *));
+extern void	logsender __P((ENVELOPE *, char *));
+extern void	smtprset __P((MAILER *, MCI *, ENVELOPE *));
+extern void	smtpquit __P((MAILER *, MCI *, ENVELOPE *));
+extern void	setuserenv __P((const char *, const char *));
+extern char	*getextenv __P((const char *));
+extern void	disconnect __P((int, ENVELOPE *));
+extern void	putxline __P((char *, size_t, MCI *, int));
+extern void	dumpfd __P((int, bool, bool));
+extern void	makemailer __P((char *));
+extern void	putfromline __P((MCI *, ENVELOPE *));
+extern void	setoption __P((int, char *, bool, bool, ENVELOPE *));
+extern void	setclass __P((int, char *));
+extern void	inittimeouts __P((char *));
+extern void	logdelivery __P((MAILER *, MCI *, const char *, ADDRESS *, time_t, ENVELOPE *));
+extern void	giveresponse __P((int, MAILER *, MCI *, ADDRESS *, time_t, ENVELOPE *));
+extern void	buildfname __P((char *, char *, char *, int));
+extern void	mci_setstat __P((MCI *, int, char *, char *));
+extern char	*smtptodsn __P((int));
+extern int	rscheck __P((char *, char *, char *, ENVELOPE *e));
+extern void	mime7to8 __P((MCI *, HDR *, ENVELOPE *));
+extern int	mime8to7 __P((MCI *, HDR *, ENVELOPE *, char **, int));
+extern void	xfclose __P((FILE *, char *, char *));
+extern int	switch_map_find __P((char *, char *[], short []));
+extern void	shorten_hostname __P((char []));
+extern int	waitfor __P((pid_t));
+extern void	proc_list_add __P((pid_t));
+extern void	proc_list_drop __P((pid_t));
+extern void	proc_list_clear __P((void));
+extern void	buffer_errors __P((void));
+extern void	flush_errors __P((bool));
+extern void	putline __P((char *, MCI *));
+extern bool	xtextok __P((char *));
+extern char	*xtextify __P((char *, char *));
+extern char	*xuntextify __P((char *));
+extern void	cleanstrcpy __P((char *, char *, int));
+extern int	getmxrr __P((char *, char **, bool, int *));
+extern int	strtorwset __P((char *, char **, int));
+extern void	printav __P((char **));
+extern void	printopenfds __P((bool));
+extern int	endmailer __P((MCI *, ENVELOPE *, char **));
+extern void	fixcrlf __P((char *, bool));
+extern int	dofork __P((void));
+extern void	initsys __P((ENVELOPE *));
+extern void	collect __P((FILE *, bool, HDR **, ENVELOPE *));
+extern void	stripquotes __P((char *));
+extern int	include __P((char *, bool, ADDRESS *, ADDRESS **, int, ENVELOPE  *));
+extern void	unlockqueue __P((ENVELOPE *));
+extern void	xunlink __P((char *));
+extern bool	runqueue __P((bool, bool));
+extern int	getla __P((void));
+extern void	sendall __P((ENVELOPE *, int));
+extern void	queueup __P((ENVELOPE *, bool));
+extern void	checkfds __P((char *));
+extern int	returntosender __P((char *, ADDRESS *, int, ENVELOPE *));
+extern void	markstats __P((ENVELOPE *, ADDRESS *));
+extern void	poststats __P((char *));
+extern char	*arpadate __P((char *));
+extern int	mailfile __P((char *, ADDRESS *, int, ENVELOPE *));
+extern void	loseqfile __P((ENVELOPE *, char *));
+extern int	prog_open __P((char **, int *, ENVELOPE *));
+extern bool	getcanonname __P((char *, int, bool));
+extern bool	path_is_dir __P((char *, bool));
+extern pid_t	dowork __P((char *, bool, bool, ENVELOPE *));
+extern int	drop_privileges __P((bool));
+extern void	fill_fd __P((int, char *));
+
+extern const char	*errstring __P((int));
+extern sigfunc_t	setsignal __P((int, sigfunc_t));
+extern int		blocksignal __P((int));
+extern int		releasesignal __P((int));
+extern struct hostent	*sm_gethostbyname __P((char *));
+extern struct hostent	*sm_gethostbyaddr __P((char *, int, int));
+extern struct passwd	*sm_getpwnam __P((char *));
+extern struct passwd	*sm_getpwuid __P((UID_T));
+extern struct passwd	*finduser __P((char *, bool *));
+
+#ifdef XDEBUG
+extern void		checkfdopen __P((int, char *));
+extern void		checkfd012 __P((char *));
+#endif
+
+/* ellipsis is a different case though */
+#ifdef __STDC__
+extern void		auth_warning(ENVELOPE *, const char *, ...);
+extern void		syserr(const char *, ...);
+extern void		usrerr(const char *, ...);
+extern void		message(const char *, ...);
+extern void		nmessage(const char *, ...);
+extern void		setproctitle(const char *, ...);
+extern void		sm_syslog(int, const char *, const char *, ...);
+#else
+extern void		auth_warning();
+extern void		syserr();
+extern void		usrerr();
+extern void		message();
+extern void		nmessage();
+extern void		setproctitle();
+extern void		sm_syslog();
+#endif
+
+#if !HASSNPRINTF
+# ifdef __STDC__
+extern int		snprintf(char *, size_t, const char *, ...);
+extern int		vsnprintf(char *, size_t, const char *, va_list);
+# else
+extern int		snprintf();
+extern int		vsnprintf();
+# endif
+#endif