spost.c

早期freebsd实现

#ifndef lint
static char sccsid[] = "@(#)spost.c	1.6 (Berkeley) 11/2/85";
#endif
#ifndef	lint
static char ident[] = "@(#)$Id: spost.c,v 1.8 1992/12/15 00:20:22 jromine Exp $";
#endif	/* lint */

/* spost.c - feed messages to sendmail */
/*
 * (This is a simpler, faster, replacement for "post" for use when "sendmail"
 * is the transport system) 
 */

#include <ctype.h>
#include <stdio.h>
#include <signal.h>
#include "../h/mh.h"
#include "../h/addrsbr.h"
#include "../h/aliasbr.h"
#include "../h/dropsbr.h"
#include "../zotnet/tws.h"
#ifdef LOCALE
#include	<locale.h>
#endif

extern char *getfullname (), *getusr ();
extern char *sendmail;


#define	uptolow(c)	((isalpha(c) && isupper (c)) ? tolower (c) : c)

#define MAX_SM_FIELD	1476	/* < largest hdr field sendmail will accept */
#define FCCS		10	/* max number of fccs allowed */

/*  */

struct swit switches[] = {
#define	FILTSW	0
    "filter filterfile", 0,
#define	NFILTSW	1
    "nofilter", 0,

#define	FRMTSW	2
    "format", 0,
#define	NFRMTSW	3
    "noformat", 0,

#define	REMVSW	4
    "remove", 0,
#define	NREMVSW	5
    "noremove", 0,

#define	VERBSW	6
    "verbose", 0,
#define	NVERBSW	7
    "noverbose", 0,

#define	WATCSW	8
    "watch", 0,
#define	NWATCSW	9
    "nowatch", 0,

#define	HELPSW	10
    "help", 4,

#define	DEBUGSW	11
    "debug", -5,

#define	DISTSW	12
    "dist", -4,			/* interface from dist */

#define BACKSW 13
    "backup", 0,
#define NBACKSW 14
    "nobackup", 0,

#define CHKSW 15
    "check", -5,		/* interface from whom */
#define NCHKSW 16
    "nocheck", -7,		/* interface from whom */
#define WHOMSW 17
    "whom", -4,			/* interface from whom */

#define PUSHSW 18		/* fork to sendmail then exit */
    "push", -4,
#define NPUSHSW 19		/* exec sendmail */
    "nopush", -6,

#define ALIASW 20
    "alias aliasfile", 0,
#define NALIASW 21
    "noalias", 0,

#define WIDTHSW 22
    "width columns", 0,

#define LIBSW 23
    "library directory", -7,

#define	ANNOSW	24
    "idanno number", -6,

    NULL, 0
};

/*  */

struct headers {
    char   *value;

    unsigned int    flags;
#define	HNOP	0x0000		/* just used to keep .set around */
#define	HBAD	0x0001		/* bad header - don't let it through */
#define	HADR	0x0002		/* header has an address field */
#define	HSUB	0x0004		/* Subject: header */
#define	HTRY	0x0008		/* try to send to addrs on header */
#define	HBCC	0x0010		/* don't output this header */
#define	HMNG	0x0020		/* mung this header */
#define	HNGR	0x0040		/* no groups allowed in this header */
#define	HFCC	0x0080		/* FCC: type header */
#define	HNIL	0x0100		/* okay for this header not to have addrs */
#define	HIGN	0x0200		/* ignore this header */

    unsigned int    set;
#define	MFRM	0x0001		/* we've seen a From: */
#define	MDAT	0x0002		/* we've seen a Date: */
#define	MRFM	0x0004		/* we've seen a Resent-From: */
#define	MVIS	0x0008		/* we've seen sighted addrs */
#define	MINV	0x0010		/* we've seen blind addrs */
#define	MRDT	0x0020		/* we've seen a Resent-Date: */
};

/*  */

static struct headers  NHeaders[] = {
    "Return-Path", HBAD, 0,
    "Received", HBAD, 0,
    "Reply-To", HADR | HNGR, 0,
    "From", HADR | HNGR, MFRM,
    "Sender", HADR | HBAD, 0,
    "Date", HNOP, MDAT,
    "Subject", HSUB, 0,
    "To", HADR | HTRY, MVIS,
    "cc", HADR | HTRY, MVIS,
    "Bcc", HADR | HTRY | HBCC | HNIL, MINV,
    "Message-Id", HBAD, 0,
    "Fcc", HFCC, 0,

    NULL
};

static struct headers  RHeaders[] = {
    "Resent-Reply-To", HADR | HNGR, 0,
    "Resent-From", HADR | HNGR, MRFM,
    "Resent-Sender", HADR | HBAD, 0,
    "Resent-Date", HNOP, MRDT,
    "Resent-Subject", HSUB, 0,
    "Resent-To", HADR | HTRY, MVIS,
    "Resent-cc", HADR | HTRY, MVIS,
    "Resent-Bcc", HADR | HTRY | HBCC, MINV,
    "Resent-Message-Id", HBAD, 0,
    "Resent-Fcc", HFCC, 0,
    "Reply-To", HADR, 0,
    "Fcc", HIGN, 0,

    NULL
};

/*  */


static short    fccind = 0;	/* index into fccfold[] */

static int  badmsg = 0;		/* message has bad semantics */
static int  verbose = 0;	/* spell it out */
static int  debug = 0;		/* debugging post */
static int  rmflg = 1;		/* remove temporary file when done */
static int  watch = 0;		/* watch the delivery process */
static int  backflg = 0;	/* rename input file as *.bak when done */
static int  whomflg = 0;	/* if just checking addresses */
static int  pushflg = 0;	/* if going to fork to sendmail */
static int  aliasflg = -1;	/* if going to process aliases */
static int  outputlinelen=72;

static unsigned msgflags = 0;	/* what we've seen */

static enum {
    normal, resent
} msgstate = normal;

static char tmpfil[] = "/tmp/pstXXXXXX";

static char from[BUFSIZ];	/* my network address */
static char signature[BUFSIZ];	/* my signature */
static char *filter = NULL;	/* the filter for BCC'ing */
static char *subject = NULL;	/* the subject field for BCC'ing */
static char *fccfold[FCCS];	/* foldernames for FCC'ing */

static struct headers  *hdrtab;	/* table for the message we're doing */
static FILE *out;		/* output (temp) file */

static	putfmt(), start_headers(), finish_headers(), putadr(),
	insert_fcc();
static	file(), fcc();
static int	get_header(), putone();
/*    MAIN */

/* ARGSUSED */

main (argc, argv)
int     argc;
char   *argv[];
{
    int     state,
	    i,
	    pid,
            compnum;
    char   *cp,
           *msg = NULL,
          **argp = argv + 1,
	    *sargv[16],
            buf[BUFSIZ],
            name[NAMESZ],
	    *arguments[MAXARGS];
    FILE * in;

#ifdef LOCALE
	setlocale(LC_ALL, "");
#endif
    invo_name = r1bindex (argv[0], '/');
    mts_init (invo_name);
    if ((cp = m_find (invo_name)) != NULL) {
	argp = copyip (brkstring (cp, " ", "\n"), arguments);
	(void) copyip (argv+1, argp);
	argp = arguments;
    }

/*  */

    while (cp = *argp++) {
	if (*cp == '-')
	    switch (smatch (++cp, switches)) {
		case AMBIGSW: 
		    ambigsw (cp, switches);
		    done (1);
		case UNKWNSW: 
		    adios (NULLCP, "-%s unknown", cp);
		case HELPSW: 
		    (void)sprintf (buf, "%s [switches] file", invo_name);
		    help (buf, switches);
		    done (1);

		case DEBUGSW: 
		    debug++;
		    continue;

		case DISTSW:
		    msgstate = resent;
		    continue;

		case WHOMSW:
		    whomflg++;
		    continue;

		case FILTSW:
		    if (!(filter = *argp++) || *filter == '-')
			adios (NULLCP, "missing argument to %s", argp[-2]);
		    continue;
		case NFILTSW:
		    filter = NULL;
		    continue;
		
		case REMVSW: 
		    rmflg++;
		    continue;
		case NREMVSW: 
		    rmflg = 0;
		    continue;

		case BACKSW: 
		    backflg++;
		    continue;
		case NBACKSW: 
		    backflg = 0;
		    continue;

		case VERBSW: 
		    verbose++;
		    continue;
		case NVERBSW: 
		    verbose = 0;
		    continue;

		case WATCSW: 
		    watch++;
		    continue;
		case NWATCSW: 
		    watch = 0;
		    continue;
		
		case PUSHSW:
		    pushflg++;
		    continue;
		case NPUSHSW:
		    pushflg = 0;
		    continue;

		case ALIASW:
		    if (!(cp = *argp++) || *cp == '-')
			adios (NULLCP, "missing argument to %s", argp[-2]);
		    if (aliasflg < 0)
			(void) alias (AliasFile);/* load default aka's */
		    aliasflg = 1;
		    if ((state = alias(cp)) != AK_OK)
			adios (NULLCP, "aliasing error in file %s - %s",
			       cp, akerror(state) );
		    continue;
		case NALIASW:
		    aliasflg = 0;
		    continue;

		case WIDTHSW:
		    if (!(cp = *argp++) || *cp == '-')
			adios (NULLCP, "missing argument to %s", argp[-2]);
		    outputlinelen = atoi (cp);
		    if (outputlinelen <= 10)
			outputlinelen = 72;
		    continue;

		case LIBSW:
		case ANNOSW:
		    /* -library & -idanno switch ignored */
		    if (!(cp = *argp++) || *cp == '-')
			adios (NULLCP, "missing argument to %s", argp[-2]);
		    continue;
	    }
	if (msg)
	    adios (NULLCP, "only one message at a time!");
	else
	    msg = cp;
    }

/*  */

    if (aliasflg < 0)
	(void) alias (AliasFile);	/* load default aka's */

    if (!msg)
	adios (NULLCP, "usage: %s [switches] file", invo_name);

    if ((in = fopen (msg, "r")) == NULL)
	adios (msg, "unable to open");

    start_headers ();
    if (debug) {
	verbose++;
	out = stdout;
    }
    else {
	    (void)mktemp (tmpfil);
	    if ((out = fopen (tmpfil, "w")) == NULL)
		adios (tmpfil, "unable to create");
	    (void)chmod (tmpfil, 0600);
	}

    hdrtab = (msgstate == normal) ? NHeaders : RHeaders;

    for (compnum = 1, state = FLD;;) {
	switch (state = m_getfld (state, name, buf, sizeof buf, in)) {
	    case FLD: 
		compnum++;
		putfmt (name, buf, out);
		continue;

	    case FLDPLUS: 
		compnum++;
		cp = add (buf, cp);
		while (state == FLDPLUS) {
		    state = m_getfld (state, name, buf, sizeof buf, in);
		    cp = add (buf, cp);
		}
		putfmt (name, cp, out);
		free (cp);
		continue;

	    case BODY: 
		finish_headers (out);
		fprintf (out, "\n%s", buf);
		if(whomflg == 0)
		    while (state == BODY) {
			state = m_getfld (state, name, buf, sizeof buf, in);
			fputs (buf, out);
		    }
		break;

	    case FILEEOF: 
		finish_headers (out);
		break;

	    case LENERR: 
	    case FMTERR: 
		adios (NULLCP, "message format error in component #%d",
			compnum);

	    default: 
		adios (NULLCP, "getfld() returned %d", state);
	}
	break;
    }

/*  */

    (void)fclose (in);
    if (backflg && !whomflg) {
	(void) strcpy (buf, m_backup (msg));
	if (rename (msg, buf) == NOTOK)
	    advise (buf, "unable to rename %s to", msg);
    }

    if (debug) {
	done (0);
    }
    else
	(void)fclose (out);

    file (tmpfil);

    /*
     * re-open the temp file, unlink it and exec sendmail, giving it
     * the msg temp file as std in.
     */
    if ( freopen( tmpfil, "r", stdin) == NULL)
	adios (tmpfil, "can't reopen for sendmail");
    if (rmflg)
	(void)unlink (tmpfil);