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NetBSD/usr.bin/mail/send.c

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/* $NetBSD: send.c,v 1.33 2009/01/25 14:07:18 lukem Exp $ */
/*
* Copyright (c) 1980, 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)send.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: send.c,v 1.33 2009/01/25 14:07:18 lukem Exp $");
#endif
#endif /* not lint */
#include "rcv.h"
#include "extern.h"
#ifdef MIME_SUPPORT
#include "mime.h"
#endif
/*
* Mail -- a mail program
*
* Mail to others.
*/
/*
* compare twwo name structures. Support for get_smopts.
*/
static int
namecmp(struct name *np1, struct name *np2)
{
for (/*EMPTY*/; np1 && np2; np1 = np1->n_flink, np2 = np2->n_flink) {
if (strcmp(np1->n_name, np2->n_name) != 0)
return 1;
}
return np1 || np2;
}
/*
* Get the sendmail options from the smopts list.
*/
static struct name *
get_smopts(struct name *to)
{
struct smopts_s *sp;
struct name *smargs, *np;
smargs = NULL;
for (np = to; np; np = np->n_flink) {
if ((sp = findsmopts(np->n_name, 0)) == NULL)
continue;
if (smargs == NULL)
smargs = sp->s_smopts;
else if (namecmp(smargs, sp->s_smopts) != 0)
return NULL;
}
if (smargs &&
smargs->n_flink == NULL &&
(smargs->n_name == NULL || smargs->n_name[0] == '\0'))
return NULL;
return smargs;
}
/*
* Output a reasonable looking status field.
*/
static void
statusput(struct message *mp, FILE *obuf, const char *prefix)
{
char statout[3];
char *cp = statout;
if (mp->m_flag & MREAD)
*cp++ = 'R';
if ((mp->m_flag & MNEW) == 0)
*cp++ = 'O';
*cp = 0;
if (statout[0])
(void)fprintf(obuf, "%sStatus: %s\n",
prefix == NULL ? "" : prefix, statout);
}
/*
* Send message described by the passed pointer to the
* passed output buffer. Return -1 on error.
* Adjust the status: field if need be.
* If doign is given, suppress ignored header fields.
* prefix is a string to prepend to each output line.
*/
PUBLIC int
sendmessage(struct message *mp, FILE *obuf, struct ignoretab *doign,
const char *prefix, struct mime_info *mip)
{
off_t len;
FILE *ibuf;
char line[LINESIZE];
int isheadflag, infld, ignoring, dostat, firstline;
char *cp;
size_t prefixlen;
size_t linelen;
ignoring = 0;
prefixlen = 0;
/*
* Compute the prefix string, without trailing whitespace
*/
if (prefix != NULL) {
const char *dp, *dp2 = NULL;
for (dp = prefix; *dp; dp++)
if (!is_WSP(*dp))
dp2 = dp;
prefixlen = dp2 == 0 ? 0 : dp2 - prefix + 1;
}
ibuf = setinput(mp);
len = mp->m_size;
isheadflag = 1;
dostat = doign == 0 || !isign("status", doign);
infld = 0;
firstline = 1;
/*
* Process headers first
*/
#ifdef MIME_SUPPORT
if (mip)
obuf = mime_decode_header(mip);
#endif
while (len > 0 && isheadflag) {
if (fgets(line, sizeof(line), ibuf) == NULL)
break;
len -= linelen = strlen(line);
if (firstline) {
/*
* First line is the From line, so no headers
* there to worry about
*/
firstline = 0;
ignoring = doign == ignoreall || doign == bouncetab;
#ifdef MIME_SUPPORT
/* XXX - ignore multipart boundary lines! */
if (line[0] == '-' && line[1] == '-')
ignoring = 1;
#endif
} else if (line[0] == '\n') {
/*
* If line is blank, we've reached end of
* headers, so force out status: field
* and note that we are no longer in header
* fields
*/
if (dostat) {
statusput(mp, obuf, prefix);
dostat = 0;
}
isheadflag = 0;
ignoring = doign == ignoreall;
} else if (infld && is_WSP(line[0])) {
/*
* If this line is a continuation (via space or tab)
* of a previous header field, just echo it
* (unless the field should be ignored).
* In other words, nothing to do.
*/
} else {
/*
* Pick up the header field if we have one.
*/
char *save_cp;
for (cp = line; *cp && *cp != ':' && !is_WSP(*cp); cp++)
continue;
save_cp = cp;
cp = skip_WSP(cp);
if (*cp++ != ':') {
/*
* Not a header line, force out status:
* This happens in uucp style mail where
* there are no headers at all.
*/
if (dostat) {
statusput(mp, obuf, prefix);
dostat = 0;
}
if (doign != ignoreall)
/* add blank line */
(void)putc('\n', obuf);
isheadflag = 0;
ignoring = 0;
} else {
/*
* If it is an ignored field and
* we care about such things, skip it.
*/
int save_c;
save_c = *save_cp;
*save_cp = 0; /* temporarily null terminate */
if (doign && isign(line, doign))
ignoring = 1;
else if ((line[0] == 's' || line[0] == 'S') &&
strcasecmp(line, "status") == 0) {
/*
* If the field is "status," go compute
* and print the real Status: field
*/
if (dostat) {
statusput(mp, obuf, prefix);
dostat = 0;
}
ignoring = 1;
} else {
ignoring = 0;
}
infld = 1;
*save_cp = save_c; /* restore the line */
}
}
if (!ignoring) {
/*
* Strip trailing whitespace from prefix
* if line is blank.
*/
if (prefix != NULL) {
if (linelen > 1)
(void)fputs(prefix, obuf);
else
(void)fwrite(prefix, sizeof(*prefix),
prefixlen, obuf);
}
(void)fwrite(line, sizeof(*line), linelen, obuf);
if (ferror(obuf))
return -1;
}
}
/*
* Copy out message body
*/
#ifdef MIME_SUPPORT
if (mip) {
obuf = mime_decode_body(mip);
if (obuf == NULL) /* XXX - early out */
return 0;
}
#endif
if (doign == ignoreall)
len--; /* skip final blank line */
linelen = 0; /* needed for in case len == 0 */
if (prefix != NULL)
while (len > 0) {
if (fgets(line, sizeof(line), ibuf) == NULL) {
linelen = 0;
break;
}
len -= linelen = strlen(line);
/*
* Strip trailing whitespace from prefix
* if line is blank.
*/
if (linelen > 1)
(void)fputs(prefix, obuf);
else
(void)fwrite(prefix, sizeof(*prefix),
prefixlen, obuf);
(void)fwrite(line, sizeof(*line), linelen, obuf);
if (ferror(obuf))
return -1;
}
else
while (len > 0) {
linelen = (size_t)len < sizeof(line) ? (size_t)len : sizeof(line);
if ((linelen = fread(line, sizeof(*line), linelen, ibuf)) == 0)
break;
len -= linelen;
if (fwrite(line, sizeof(*line), linelen, obuf) != linelen)
return -1;
}
if (doign == ignoreall && linelen > 0 && line[linelen - 1] != '\n') {
int c;
/* no final blank line */
if ((c = getc(ibuf)) != EOF && putc(c, obuf) == EOF)
return -1;
}
return 0;
}
/*
* Fix the header by glopping all of the expanded names from
* the distribution list into the appropriate fields.
*/
static void
fixhead(struct header *hp, struct name *tolist)
{
struct name *np;
hp->h_to = NULL;
hp->h_cc = NULL;
hp->h_bcc = NULL;
for (np = tolist; np != NULL; np = np->n_flink) {
if (np->n_type & GDEL)
continue; /* Don't copy deleted addresses to the header */
if ((np->n_type & GMASK) == GTO)
hp->h_to =
cat(hp->h_to, nalloc(np->n_name, np->n_type));
else if ((np->n_type & GMASK) == GCC)
hp->h_cc =
cat(hp->h_cc, nalloc(np->n_name, np->n_type));
else if ((np->n_type & GMASK) == GBCC)
hp->h_bcc =
cat(hp->h_bcc, nalloc(np->n_name, np->n_type));
}
}
/*
* Format the given header line to not exceed 72 characters.
*/
static void
fmt(const char *str, struct name *np, FILE *fo, int comma)
{
int col, len;
comma = comma ? 1 : 0;
col = strlen(str);
if (col)
(void)fputs(str, fo);
for (/*EMPTY*/; np != NULL; np = np->n_flink) {
if (np->n_flink == NULL)
comma = 0;
len = strlen(np->n_name);
col++; /* for the space */
if (col + len + comma > 72 && col > 4) {
(void)fputs("\n ", fo);
col = 4;
} else
(void)putc(' ', fo);
(void)fputs(np->n_name, fo);
if (comma)
(void)putc(',', fo);
col += len + comma;
}
(void)putc('\n', fo);
}
/*
* Dump the to, subject, cc header on the
* passed file buffer.
*/
PUBLIC int
puthead(struct header *hp, FILE *fo, int w)
{
int gotcha;
gotcha = 0;
if (hp->h_to != NULL && w & GTO)
fmt("To:", hp->h_to, fo, w&GCOMMA), gotcha++;
if (hp->h_subject != NULL && w & GSUBJECT)
(void)fprintf(fo, "Subject: %s\n", hp->h_subject), gotcha++;
if (hp->h_smopts != NULL && w & GSMOPTS)
(void)fprintf(fo, "(sendmail options: %s)\n", detract(hp->h_smopts, GSMOPTS)), gotcha++;
if (hp->h_cc != NULL && w & GCC)
fmt("Cc:", hp->h_cc, fo, w&GCOMMA), gotcha++;
if (hp->h_bcc != NULL && w & GBCC)
fmt("Bcc:", hp->h_bcc, fo, w&GCOMMA), gotcha++;
if (hp->h_in_reply_to != NULL && w & GMISC)
(void)fprintf(fo, "In-Reply-To: %s\n", hp->h_in_reply_to), gotcha++;
if (hp->h_references != NULL && w & GMISC)
fmt("References:", hp->h_references, fo, w&GCOMMA), gotcha++;
#ifdef MIME_SUPPORT
if (w & GMIME && (hp->h_attach || value(ENAME_MIME_ENCODE_MSG)))
mime_putheader(fo, hp), gotcha++;
#endif
if (gotcha && w & GNL)
(void)putc('\n', fo);
return 0;
}
/*
* Prepend a header in front of the collected stuff
* and return the new file.
*/
static FILE *
infix(struct header *hp, FILE *fi)
{
FILE *nfo, *nfi;
int c, fd;
char tempname[PATHSIZE];
(void)snprintf(tempname, sizeof(tempname),
"%s/mail.RsXXXXXXXXXX", tmpdir);
if ((fd = mkstemp(tempname)) == -1 ||
(nfo = Fdopen(fd, "w")) == NULL) {
if (fd != -1)
(void)close(fd);
warn("%s", tempname);
return fi;
}
if ((nfi = Fopen(tempname, "r")) == NULL) {
warn("%s", tempname);
(void)Fclose(nfo);
(void)rm(tempname);
return fi;
}
(void)rm(tempname);
#ifdef MIME_SUPPORT
(void)puthead(hp, nfo, GTO|GSUBJECT|GCC|GBCC|GMISC|GMIME|GNL|GCOMMA);
#else
(void)puthead(hp, nfo, GTO|GSUBJECT|GCC|GBCC|GMISC|GNL|GCOMMA);
#endif
c = getc(fi);
while (c != EOF) {
(void)putc(c, nfo);
c = getc(fi);
}
if (ferror(fi)) {
warn("read");
rewind(fi);
return fi;
}
(void)fflush(nfo);
if (ferror(nfo)) {
warn("%s", tempname);
(void)Fclose(nfo);
(void)Fclose(nfi);
rewind(fi);
return fi;
}
(void)Fclose(nfo);
(void)Fclose(fi);
rewind(nfi);
return nfi;
}
/*
* Save the outgoing mail on the passed file.
*
* Take care not to save a valid headline or the mbox file will be
* broken. Prefix valid headlines with '>'.
*
* Note: most servers prefix any line starting with "From " in the
* body of the message. We are more restrictive to avoid header/body
* issues.
*/
/*ARGSUSED*/
static int
savemail(const char name[], FILE *fi)
{
FILE *fo;
time_t now;
mode_t m;
char *line;
size_t linelen;
int afterblank;
m = umask(077);
fo = Fopen(name, "a");
(void)umask(m);
if (fo == NULL) {
warn("%s", name);
return -1;
}
(void)time(&now);
(void)fprintf(fo, "From %s %s", myname, ctime(&now));
afterblank = 0;
while ((line = fgetln(fi, &linelen)) != NULL) {
char c, *cp;
cp = line + linelen - 1;
if (afterblank &&
linelen > sizeof("From . Aaa Aaa O0 00:00 0000") &&
line[0] == 'F' &&
line[1] == 'r' &&
line[2] == 'o' &&
line[3] == 'm' &&
line[4] == ' ' &&
*cp == '\n') {
c = *cp;
*cp = '\0';
if (ishead(line))
(void)fputc('>', fo);
*cp = c;
}
(void)fwrite(line, 1, linelen, fo);
afterblank = linelen == 1 && line[0] == '\n';
}
(void)putc('\n', fo);
(void)fflush(fo);
if (ferror(fo))
warn("%s", name);
(void)Fclose(fo);
rewind(fi);
return 0;
}
/*
* Mail a message that is already prepared in a file.
*/
PUBLIC void
mail2(FILE *mtf, const char **namelist)
{
int pid;
const char *cp;
if (debug) {
const char **t;
(void)printf("Sendmail arguments:");
for (t = namelist; *t != NULL; t++)
(void)printf(" \"%s\"", *t);
(void)printf("\n");
return;
}
if ((cp = value(ENAME_RECORD)) != NULL)
(void)savemail(expand(cp), mtf);
/*
* Fork, set up the temporary mail file as standard
* input for "mail", and exec with the user list we generated
* far above.
*/
pid = fork();
switch (pid) {
case -1:
warn("fork");
savedeadletter(mtf);
return;
case 0:
{
sigset_t nset;
(void)sigemptyset(&nset);
(void)sigaddset(&nset, SIGHUP);
(void)sigaddset(&nset, SIGINT);
(void)sigaddset(&nset, SIGQUIT);
(void)sigaddset(&nset, SIGTSTP);
(void)sigaddset(&nset, SIGTTIN);
(void)sigaddset(&nset, SIGTTOU);
prepare_child(&nset, fileno(mtf), -1);
if ((cp = value(ENAME_SENDMAIL)) != NULL)
cp = expand(cp);
else
cp = _PATH_SENDMAIL;
(void)execv(cp, (char *const *)__UNCONST(namelist));
warn("%s", cp);
_exit(1);
break; /* Appease GCC */
}
default:
if (value(ENAME_VERBOSE) != NULL)
(void)wait_child(pid);
else
free_child(pid);
break;
}
}
/*
* Mail a message on standard input to the people indicated
* in the passed header. (Internal interface).
*/
PUBLIC void
mail1(struct header *hp, int printheaders)
{
const char **namelist;
struct name *to;
FILE *mtf;
/*
* Collect user's mail from standard input.
* Get the result as mtf.
*/
if ((mtf = collect(hp, printheaders)) == NULL)
return;
if (value(ENAME_INTERACTIVE) != NULL) {
if (value(ENAME_ASKCC) != NULL || value(ENAME_ASKBCC) != NULL) {
if (value(ENAME_ASKCC) != NULL)
(void)grabh(hp, GCC);
if (value(ENAME_ASKBCC) != NULL)
(void)grabh(hp, GBCC);
} else {
(void)printf("EOT\n");
(void)fflush(stdout);
}
}
if (fsize(mtf) == 0) {
if (value(ENAME_DONTSENDEMPTY) != NULL)
goto out;
if (hp->h_subject == NULL)
(void)printf("No message, no subject; hope that's ok\n");
else
(void)printf("Null message body; hope that's ok\n");
}
/*
* Now, take the user names from the combined
* to and cc lists and do all the alias
* processing.
*/
senderr = 0;
to = usermap(cat(hp->h_bcc, cat(hp->h_to, hp->h_cc)));
if (to == NULL) {
(void)printf("No recipients specified\n");
senderr++;
}
#ifdef MIME_SUPPORT
/*
* If there are attachments, repackage the mail as a
* multi-part MIME message.
*/
if (hp->h_attach || value(ENAME_MIME_ENCODE_MSG))
mtf = mime_encode(mtf, hp);
#endif
/*
* Look through the recipient list for names with /'s
* in them which we write to as files directly.
*/
to = outof(to, mtf, hp);
if (senderr)
savedeadletter(mtf);
to = elide(to);
if (count(to) == 0)
goto out;
fixhead(hp, to);
if ((mtf = infix(hp, mtf)) == NULL) {
(void)fprintf(stderr, ". . . message lost, sorry.\n");
return;
}
if (hp->h_smopts == NULL) {
hp->h_smopts = get_smopts(to);
if (hp->h_smopts != NULL &&
hp->h_smopts->n_name[0] != '\0' &&
value(ENAME_SMOPTS_VERIFY) != NULL)
if (grabh(hp, GSMOPTS)) {
(void)printf("mail aborted!\n");
savedeadletter(mtf);
goto out;
}
}
namelist = unpack(cat(hp->h_smopts, to));
mail2(mtf, namelist);
out:
(void)Fclose(mtf);
}
/*
* Interface between the argument list and the mail1 routine
* which does all the dirty work.
*/
PUBLIC int
mail(struct name *to, struct name *cc, struct name *bcc,
struct name *smopts, char *subject, struct attachment *attach)
{
struct header head;
/* ensure that all header fields are initially NULL */
(void)memset(&head, 0, sizeof(head));
head.h_to = to;
head.h_subject = subject;
head.h_cc = cc;
head.h_bcc = bcc;
head.h_smopts = smopts;
#ifdef MIME_SUPPORT
head.h_attach = attach;
#endif
mail1(&head, 0);
return 0;
}
/*
* Send mail to a bunch of user names. The interface is through
* the mail1 routine above.
*/
PUBLIC int
sendmail(void *v)
{
char *str = v;
struct header head;
/* ensure that all header fields are initially NULL */
(void)memset(&head, 0, sizeof(head));
head.h_to = extract(str, GTO);
mail1(&head, 0);
return 0;
}
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