sendmail.h

操作系统SunOS 4.1.3版本的源码

**	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	'\020'	/* match zero or more tokens */
# define MATCHANY	'\021'	/* match one or more tokens */
# define MATCHONE	'\022'	/* match exactly one token */
# define MATCHCLASS	'\023'	/* match one token in a class */
# define MATCHNCLASS	'\024'	/* match anything not in class */
# define MATCHREPL	'\025'	/* replacement on RHS for above */

/* right hand side items */
# define CANONNET	'\026'	/* canonical net, next token */
# define CANONHOST	'\027'	/* canonical host, next token */
# define CANONUSER	'\030'	/* canonical user, next N tokens */
# define CALLSUBR	'\031'	/* call another rewriting set */

/* conditionals in macros */
# define CONDIF		'\032'	/* conditional if-then */
# define CONDELSE	'\033'	/* conditional else */
# define CONDFI		'\034'	/* conditional fi */

/* bracket characters for host name lookup */
# define HOSTBEGIN	'\035'	/* hostname lookup begin */
# define HOSTEND	'\036'	/* hostname lookup end */
# define MATCHYELLOW	'\037'	/* NIS map to match */
# define MATCHNYELLOW	'\017'	/* NIS map to not match */
# define YELLOWBEGIN	'\016'  /* start of a NIS replacement */
# define YELLOWEND	'\016'  /* end of a NIS replacement */

/* \001 is also reserved as the macro expansion character */
/*
**  Information about hosts that we have looked up recently.
**
**	This stuff is 4.2/3bsd specific.
*/
# ifdef DAEMON
# ifdef VMUNIX

# define HOSTINFO	struct hostinfo

HOSTINFO
{
	struct in_addr	h_addrlist[MAXMXHOSTS+1]; /* Internet addresses */
	u_short		h_index;	/* index into above */
	u_short		h_port;		/* host port number */
	unsigned char	h_fd;		/* File descriptor, if connected */
	unsigned	h_valid:1;	/* 1=this entry has valid info */
	unsigned	h_exists:1;	/* 1=host name/addr is known */
	unsigned	h_tried:1;	/* 1=tried to connect */
	unsigned	h_down:1;	/* 1=tried & failed connect */
	unsigned	h_open:1;	/* 1=currently connected */
	int		h_errno;	/* error on last connection */
};

/*
 * chache entry for mail exchanger information
 */
struct mxinfo
{
	int	mx_number;			/* number of records */
	int	mx_rcode;			/* remembered error code */
	char 	*mx_hosts[MAXMXHOSTS+1];	/* names of exchangers */
};

/*
 * Cache entry for NIS lookup operations
 */
struct bitmap2
{
	BITMAP	positive, negative;
};

# define ENAMESER 999			/* name service time out */

# endif VMUNIX
# endif DAEMON
/*
**  Symbol table definitions
*/

struct symtab
{
	char		*s_name;	/* name to be entered */
	char		s_type;		/* general type (see below) */
	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 */
# ifdef HOSTINFO
		HOSTINFO	sv_host;	/* host information */
		struct mxinfo sv_mxinfo;	/* mail exchanger info */
# endif HOSTINFO
		struct bitmap2	sv_bitmap2;	/* NIS lookup cache */
	}	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_HOST	5	/* host information */
# define ST_MX		6	/* a mail exchanger list */
# define ST_YP		7	/* NIS lookup */

# 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

extern STAB	*stab();

/* 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 */
	int		(*ev_func)();	/* 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 */

struct metamac
{
	char	metaname;
	char	metaval;
};

extern struct metamac	MetaMacros[];
/*
**  Operation, send, and error 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_ARPAFTP	'a'		/* old-style arpanet protocols */
#define MD_SMTP		's'		/* run SMTP on standard input */
#define MD_DAEMON	'd'		/* run as a daemon */
#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 */


EXTERN char	SendMode;	/* send mode, see below */

#define SM_DELIVER	'i'		/* interactive delivery */
#define SM_QUICKD	'j'		/* deliver w/o queueing */
#define SM_FORK		'b'		/* deliver in background */
#define SM_QUEUE	'q'		/* queue, don't deliver */
#define SM_VERIFY	'v'		/* verify only (used internally) */

/* used only as a parameter to sendall */
#define SM_DEFAULT	'\0'		/* unspecified, use SendMode */


EXTERN char	ErrorMode;	/* error mode, see below */

#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) */

/* offset used to issure that the error messages for name server error
 * codes are unique.
 */
#define	MAX_ERRNO	100
/*
**  Global variables.
*/

EXTERN bool	FromFlag;	/* if set, "From" person is explicit */
EXTERN bool	NoAlias;	/* if set, don't do any aliasing */
EXTERN bool	ForceMail;	/* if set, mail even if already got a copy */
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	Verbose;	/* set if blow-by-blow desired */
EXTERN bool	GrabTo;		/* if set, get recipients from msg */
EXTERN bool	NoReturn;	/* don't return letter to sender */
EXTERN bool	SuprErrs;	/* set if we are suppressing errors */
EXTERN bool	QueueRun;	/* currently running message from the queue */
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 int	SafeAlias;	/* minutes to wait until @:@ in alias file */
EXTERN time_t	TimeOut;	/* time until timeout */
EXTERN FILE	*InChannel;	/* input connection */
EXTERN FILE	*OutChannel;	/* output connection */
EXTERN int	RealUid;	/* when Daemon, real uid of caller */
EXTERN int	RealGid;	/* when Daemon, real gid of caller */
EXTERN int	DefUid;		/* default uid to run as */
EXTERN char	*DefUser;	/* default user to run as (from DefUid) */
EXTERN int	DefGid;		/* default gid to run as */
EXTERN int	OldUmask;	/* umask when sendmail starts up */
EXTERN int	Errors;		/* set if errors (local to single pass) */
EXTERN int	ExitStat;	/* exit status code */
EXTERN int	AliasLevel;	/* depth of aliasing */
EXTERN int	MotherPid;	/* proc id of parent process */
EXTERN int	LineNumber;	/* line number in current input */
EXTERN time_t	ReadTimeout;	/* timeout on reads */
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	QueueFactor;	/* slope of queue function */
EXTERN time_t	QueueIntvl;	/* intervals between running the queue */
EXTERN char	*AliasFile;	/* location of alias file */
EXTERN char	*HelpFile;	/* location of SMTP help file */
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 char	*ConfFile;	/* location of configuration file [conf.c] */
extern char	*FreezeFile;	/* location of frozen memory image [conf.c] */
extern char	Arpa_Info[];	/* the reply code for Arpanet info [conf.c] */
extern ADDRESS	NullAddress;	/* a null (template) address [main.c] */
EXTERN char	SpaceSub;	/* substitution for <lwsp> */
EXTERN int	WkClassFact;	/* multiplier for message class -> priority */
EXTERN int	WkRecipFact;	/* multiplier for # of recipients -> priority */
EXTERN int	WkTimeFact;	/* priority offset each time this job is run */
EXTERN int	CheckPointLimit;	/* deliveries before checkpointing */
EXTERN char	*PostMasterCopy;	/* address to get errs cc's */
EXTERN char	*TrustedUsers[MAXTRUST+1];	/* list of trusted users */
EXTERN char	*UserEnviron[MAXUSERENVIRON+1];	/* saved user environment */
EXTERN char	*RemoteServer;	/* remote mail server name */
EXTERN int	RecipThreshold;	/* minimum recipients to prohibit null msg */
EXTERN int	Maxhop;		/* maximum number of hops (Received lines) */
/*
**  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.
*/

# include	<sysexits.h>


/*
**  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 ADDRESS	*parseaddr();
extern char	*xalloc();
extern bool	sameaddr();
extern FILE	*dfopen();
extern EVENT	*setevent();
extern char	*sfgets();
extern char	*queuename();
extern time_t	curtime();