/*
* spost.c -- feed messages to sendmail
*
* This is a simpler, faster, replacement for "post" for use
* when "sendmail" is the transport system.
*
* $Id: spost.c,v 1.14 2003/09/22 01:04:04 gbburkhardt Exp $
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include <h/mh.h>
#include <signal.h>
#include <h/addrsbr.h>
#include <h/aliasbr.h>
#include <h/dropsbr.h>
#include <h/tws.h>
#include <h/mts.h>
#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 BACKSW 10
{ "backup", 0 },
#define NBACKSW 11
{ "nobackup", 0 },
#define ALIASW 12
{ "alias aliasfile", 0 },
#define NALIASW 13
{ "noalias", 0 },
#define WIDTHSW 14
{ "width columns", 0 },
#define VERSIONSW 15
{ "version", 0 },
#define HELPSW 16
{ "help", 0 },
#define DEBUGSW 17
{ "debug", -5 },
#define DISTSW 18
{ "dist", -4 }, /* interface from dist */
#define CHKSW 19
{ "check", -5 }, /* interface from whom */
#define NCHKSW 20
{ "nocheck", -7 }, /* interface from whom */
#define WHOMSW 21
{ "whom", -4 }, /* interface from whom */
#define PUSHSW 22 /* fork to sendmail then exit */
{ "push", -4 },
#define NPUSHSW 23 /* exec sendmail */
{ "nopush", -6 },
#define LIBSW 24
{ "library directory", -7 },
#define ANNOSW 25
{ "idanno number", -6 },
{ NULL, 0 }
};
/* flags for headers->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 */
/* flags for headers->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: */
struct headers {
char *value;
unsigned int flags;
unsigned int set;
};
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, 0, 0 }
};
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, 0, 0 }
};
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 */
extern char *sendmail;
/*
* external prototypes
*/
extern char *getfullname (void);
extern char *getusername (void);
extern boolean draft_from_masquerading; /* defined in mts.c */
/*
* static prototypes
*/
static void putfmt (char *, char *, FILE *);
static void start_headers (void);
static void finish_headers (FILE *);
static int get_header (char *, struct headers *);
static void putadr (char *, struct mailname *);
static int putone (char *, int, int);
static void insert_fcc (struct headers *, char *);
static void file (char *);
static void fcc (char *, char *);
#if 0
static void die (char *, char *, ...);
static void make_bcc_file (void);
#endif
int
main (int argc, char **argv)
{
int state, i, pid, compnum;
char *cp, *msg = NULL, **argp, **arguments;
char *sargv[16], buf[BUFSIZ], name[NAMESZ];
FILE *in;
#ifdef LOCALE
setlocale(LC_ALL, "");
#endif
invo_name = r1bindex (argv[0], '/');
/* foil search of user profile/context */
if (context_foil (NULL) == -1)
done (1);
mts_init (invo_name);
arguments = getarguments (invo_name, argc, argv, 0);
argp = arguments;
while ((cp = *argp++)) {
if (*cp == '-') {
switch (smatch (++cp, switches)) {
case AMBIGSW:
ambigsw (cp, switches);
done (1);
case UNKWNSW:
adios (NULL, "-%s unknown", cp);
case HELPSW:
snprintf (buf, sizeof(buf), "%s [switches] file", invo_name);
print_help (buf, switches, 1);
done (1);
case VERSIONSW:
print_version(invo_name);
done (1);
case DEBUGSW:
debug++;
continue;
case DISTSW:
msgstate = resent;
continue;
case WHOMSW:
whomflg++;
continue;
case FILTSW:
if (!(filter = *argp++) || *filter == '-')
adios (NULL, "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 (NULL, "missing argument to %s", argp[-2]);
if (aliasflg < 0)
alias (AliasFile);/* load default aka's */
aliasflg = 1;
if ((state = alias(cp)) != AK_OK)
adios (NULL, "aliasing error in file %s - %s",
cp, akerror(state) );
continue;
case NALIASW:
aliasflg = 0;
continue;
case WIDTHSW:
if (!(cp = *argp++) || *cp == '-')
adios (NULL, "missing argument to %s", argp[-2]);
outputlinelen = atoi (cp);
if (outputlinelen <= 10)
outputlinelen = 72;
continue;
case LIBSW:
if (!(cp = *argp++) || *cp == '-')
adios (NULL, "missing argument to %s", argp[-2]);
/* create a minimal context */
if (context_foil (cp) == -1)
done(1);
continue;
case ANNOSW:
/* -idanno switch ignored */
if (!(cp = *argp++) || *cp == '-')
adios (NULL, "missing argument to %s", argp[-2]);
continue;
}
}
if (msg)
adios (NULL, "only one message at a time!");
else
msg = cp;
}
if (aliasflg < 0)
alias (AliasFile); /* load default aka's */
if (!msg)
adios (NULL, "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 {
#ifdef HAVE_MKSTEMP
if ((out = fdopen( mkstemp (tmpfil), "w" )) == NULL )
adios (tmpfil, "unable to create");
#else
mktemp (tmpfil);
if ((out = fopen (tmpfil, "w")) == NULL)
adios (tmpfil, "unable to create");
chmod (tmpfil, 0600);
#endif
}
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 (NULL, "message format error in component #%d",
compnum);
default:
adios (NULL, "getfld() returned %d", state);
}
break;
}
fclose (in);
if (backflg && !whomflg) {
strncpy (buf, m_backup (msg), sizeof(buf));
if (rename (msg, buf) == NOTOK)
advise (buf, "unable to rename %s to", msg);
}
if (debug) {
done (0);
}
else
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)
unlink (tmpfil);
argp = sargv;
*argp++ = "send-mail";
*argp++ = "-m"; /* send to me too */
*argp++ = "-t"; /* read msg for recipients */
*argp++ = "-i"; /* don't stop on "." */
if (whomflg)
*argp++ = "-bv";
if (watch || verbose)
*argp++ = "-v";
*argp = NULL;
if (pushflg && !(watch || verbose)) {
/* fork to a child to run sendmail */
for (i=0; (pid = vfork()) == NOTOK && i < 5; i++)
sleep(5);
switch (pid) {
case NOTOK:
fprintf (verbose ? stdout : stderr, "%s: can't fork to %s\n",
invo_name, sendmail);
exit(-1);
case OK:
/* we're the child .. */
break;
default:
exit(0);
}
}
execv ( sendmail, sargv);
adios ( sendmail, "can't exec");
return 0; /* dead code to satisfy the compiler */
}
/* DRAFT GENERATION */
static void
putfmt (char *name, char *str, FILE *out)
{
int i;
char *cp, *pp;
struct headers *hdr;
while (*str == ' ' || *str == '\t')
str++;
if ((i = get_header (name, hdrtab)) == NOTOK) {
fprintf (out, "%s: %s", name, str);
return;
}
hdr = &hdrtab[i];
if (hdr->flags & HIGN)
return;
if (hdr->flags & HBAD) {
advise (NULL, "illegal header line -- %s:", name);
badmsg++;
return;
}
msgflags |= hdr->set;
if (hdr->flags & HSUB)
subject = subject ? add (str, add ("\t", subject)) : getcpy (str);
if (hdr->flags & HFCC) {
if ((cp = strrchr(str, '\n')))
*cp = 0;
for (cp = pp = str; (cp = strchr(pp, ',')); pp = cp) {
*cp++ = 0;
insert_fcc (hdr, pp);
}
insert_fcc (hdr, pp);
return;
}
#ifdef notdef
if (hdr->flags & HBCC) {
insert_bcc(str);
return;
}
#endif /* notdef */
if (*str != '\n' && *str != '\0') {
if (aliasflg && hdr->flags & HTRY) {
/* this header contains address(es) that we have to do
* alias expansion on. Because of the saved state in
* getname we have to put all the addresses into a list.
* We then let putadr munch on that list, possibly
* expanding aliases.
*/
register struct mailname *f = 0;
register struct mailname *mp = 0;
while ((cp = getname(str))) {
mp = getm( cp, NULL, 0, AD_HOST, NULL);
if (f == 0) {
f = mp;
mp->m_next = mp;
} else {
mp->m_next = f->m_next;
f->m_next = mp;
f = mp;
}
}
f = mp->m_next; mp->m_next = 0;
putadr( name, f );
} else {
/* The author(s) of spost decided that alias substitution wasn't
necessary for the non-HTRY headers. Unfortunately, one of those
headers is "From:", and having alias substitution work on that is
extremely useful for someone with a lot of POP3 email accounts or
aliases. post supports aliasing of "From:"...
Since "From:"-processing is incompletely implemented in this
unsupported and undocumented spost backend, I'm not going to take
the time to implement my new draft-From:-based email address
masquerading. If I do ever implement it here, I'd almost
certainly want to implement "From:" line alias processing as
well. -- Dan Harkless <dan-nmh@dilvish.speed.net> */
fprintf (out, "%s: %s", name, str );
}
}
}
static void
start_headers (void)
{
char *cp;
char sigbuf[BUFSIZ];
strncpy(from, getusername(), sizeof(from));
if ((cp = getfullname ()) && *cp) {
strncpy (sigbuf, cp, sizeof(sigbuf));
snprintf (signature, sizeof(signature), "%s <%s>", sigbuf, from);
}
else
snprintf (signature, sizeof(signature), "%s", from);
}
static void
finish_headers (FILE *out)
{
switch (msgstate) {
case normal:
if (!(msgflags & MDAT))
fprintf (out, "Date: %s\n", dtimenow (0));
if (msgflags & MFRM) {
/* There was already a From: in the draft. Don't add one. */
if (!draft_from_masquerading)
/* mts.conf didn't contain "masquerade:[...]draft_from[...]"
so we'll reveal the user's actual account@thismachine
address in a Sender: header (and use it as the envelope
From: later). */
fprintf (out, "Sender: %s\n", from);
}
else
fprintf (out, "From: %s\n", signature);
#ifdef notdef
if (!(msgflags & MVIS))
fprintf (out, "Bcc: Blind Distribution List: ;\n");
#endif /* notdef */
break;
case resent:
if (!(msgflags & MRDT))
fprintf (out, "Resent-Date: %s\n", dtimenow(0));
if (msgflags & MRFM) {
/* There was already a Resent-From: in draft. Don't add one. */
if (!draft_from_masquerading)
/* mts.conf didn't contain "masquerade:[...]draft_from[...]"
so we'll reveal the user's actual account@thismachine
address in a Sender: header (and use it as the envelope
From: later). */
fprintf (out, "Resent-Sender: %s\n", from);
}
else
/* Construct a Resent-From: header. */
fprintf (out, "Resent-From: %s\n", signature);
#ifdef notdef
if (!(msgflags & MVIS))
fprintf (out, "Resent-Bcc: Blind Re-Distribution List: ;\n");
#endif /* notdef */
break;
}
if (badmsg)
adios (NULL, "re-format message and try again");
}
static int
get_header (char *header, struct headers *table)
{
struct headers *h;
for (h = table; h->value; h++)
if (!strcasecmp (header, h->value))
return (h - table);
return NOTOK;
}
/*
* output the address list for header "name". The address list
* is a linked list of mailname structs. "nl" points to the head
* of the list. Alias substitution should be done on nl.
*/
static void
putadr (char *name, struct mailname *nl)
{
register struct mailname *mp, *mp2;
register int linepos;
register char *cp;
int namelen;
fprintf (out, "%s: ", name);
namelen = strlen(name) + 2;
linepos = namelen;
for (mp = nl; mp; ) {
if (linepos > MAX_SM_FIELD) {
fprintf (out, "\n%s: ", name);
linepos = namelen;
}
if (mp->m_nohost) {
/* a local name - see if it's an alias */
cp = akvalue(mp->m_mbox);
if (cp == mp->m_mbox)
/* wasn't an alias - use what the user typed */
linepos = putone( mp->m_text, linepos, namelen );
else
/* an alias - expand it */
while ((cp = getname(cp))) {
if (linepos > MAX_SM_FIELD) {
fprintf (out, "\n%s: ", name);
linepos = namelen;
}
mp2 = getm( cp, NULL, 0, AD_HOST, NULL);
if (akvisible()) {
mp2->m_pers = getcpy(mp->m_mbox);
linepos = putone( adrformat(mp2), linepos, namelen );
} else {
linepos = putone( mp2->m_text, linepos, namelen );
}
mnfree( mp2 );
}
} else {
/* not a local name - use what the user typed */
linepos = putone( mp->m_text, linepos, namelen );
}
mp2 = mp;
mp = mp->m_next;
mnfree( mp2 );
}
putc( '\n', out );
}
static int
putone (char *adr, int pos, int indent)
{
register int len;
static int linepos;
len = strlen( adr );
if (pos == indent)
linepos = pos;
else if ( linepos+len > outputlinelen ) {
fprintf ( out, ",\n%*s", indent, "");
linepos = indent;
pos += indent + 2;
}
else {
fputs( ", ", out );
linepos += 2;
pos += 2;
}
fputs( adr, out );
linepos += len;
return (pos+len);
}
static void
insert_fcc (struct headers *hdr, char *pp)
{
char *cp;
for (cp = pp; isspace (*cp); cp++)
continue;
for (pp += strlen (pp) - 1; pp > cp && isspace (*pp); pp--)
continue;
if (pp >= cp)
*++pp = 0;
if (*cp == 0)
return;
if (fccind >= FCCS)
adios (NULL, "too many %ss", hdr->value);
fccfold[fccind++] = getcpy (cp);
}
#if 0
/* BCC GENERATION */
static void
make_bcc_file (void)
{
pid_t child_id;
int fd, i, status;
char *vec[6];
FILE * in, *out;
#ifdef HAVE_MKSTEMP
fd = mkstemp(bccfil);
if (fd == -1 || (out = fdopen(fd, "w")) == NULL)
adios (bccfil, "unable to create");
#else
mktemp (bccfil);
if ((out = fopen (bccfil, "w")) == NULL)
adios (bccfil, "unable to create");
#endif
chmod (bccfil, 0600);
fprintf (out, "Date: %s\n", dtimenow (0));
fprintf (out, "From: %s\n", signature);
if (subject)
fprintf (out, "Subject: %s", subject);
fprintf (out, "BCC:\n\n------- Blind-Carbon-Copy\n\n");
fflush (out);
if (filter == NULL) {
if ((fd = open (tmpfil, O_RDONLY)) == NOTOK)
adios (NULL, "unable to re-open");
cpydgst (fd, fileno (out), tmpfil, bccfil);
close (fd);
}
else {
vec[0] = r1bindex (mhlproc, '/');
for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
sleep (5);
switch (child_id) {
case NOTOK:
adios ("vfork", "unable to");
case OK:
dup2 (fileno (out), 1);
i = 1;
vec[i++] = "-forward";
vec[i++] = "-form";
vec[i++] = filter;
vec[i++] = tmpfil;
vec[i] = NULL;
execvp (mhlproc, vec);
adios (mhlproc, "unable to exec");
default:
if (status = pidwait(child_id, OK))
admonish (NULL, "%s lost (status=0%o)", vec[0], status);
break;
}
}
fseek (out, 0L, SEEK_END);
fprintf (out, "\n------- End of Blind-Carbon-Copy\n");
fclose (out);
}
#endif /* if 0 */
/* FCC INTERACTION */
static void
file (char *path)
{
int i;
if (fccind == 0)
return;
for (i = 0; i < fccind; i++)
if (whomflg)
printf ("Fcc: %s\n", fccfold[i]);
else
fcc (path, fccfold[i]);
}
static void
fcc (char *file, char *folder)
{
pid_t child_id;
int i, status;
char fold[BUFSIZ];
if (verbose)
printf ("%sFcc: %s\n", msgstate == resent ? "Resent-" : "", folder);
fflush (stdout);
for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
sleep (5);
switch (child_id) {
case NOTOK:
if (!verbose)
fprintf (stderr, " %sFcc %s: ",
msgstate == resent ? "Resent-" : "", folder);
fprintf (verbose ? stdout : stderr, "no forks, so not ok\n");
break;
case OK:
snprintf (fold, sizeof(fold), "%s%s",
*folder == '+' || *folder == '@' ? "" : "+", folder);
execlp (fileproc, r1bindex (fileproc, '/'),
"-link", "-file", file, fold, NULL);
_exit (-1);
default:
if ((status = pidwait(child_id, OK))) {
if (!verbose)
fprintf (stderr, " %sFcc %s: ",
msgstate == resent ? "Resent-" : "", folder);
fprintf (verbose ? stdout : stderr,
" errored (0%o)\n", status);
}
}
fflush (stdout);
}
#if 0
/*
* TERMINATION
*/
static void
die (char *what, char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
advertise (what, NULL, fmt, ap);
va_end(ap);
done (1);
}
#endif
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