hold_all_sigs(): do not block ABRT/BUS/FPE/ILL/SEGV, too

[s-mailx.git] / sendout.c

/*@ S-nail - a mail user agent derived from Berkeley Mail.
 *@ Mail to others.
 *
 * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
 * Copyright (c) 2012 - 2014 Steffen "Daode" Nurpmeso <sdaoden@users.sf.net>.
 */
/*
 * 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. 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.
 */

#ifndef HAVE_AMALGAMATION
# include "nail.h"
#endif

#include <fcntl.h>

#define INFIX_BUF       \
        ((1024 / B64_ENCODE_INPUT_PER_LINE) * B64_ENCODE_INPUT_PER_LINE)

static char     *send_boundary;
static bool_t   _senderror;

static enum okay        _putname(char const *line, enum gfield w,
                                enum sendaction action, size_t *gotcha,
                                char const *prefix, FILE *fo, struct name **xp);

/* Get an encoding flag based on the given string */
static char const *     _get_encoding(const enum conversion convert);

/* Write an attachment to the file buffer, converting to MIME */
static int              _attach_file(struct attachment *ap, FILE *fo);
static int              __attach_file(struct attachment *ap, FILE *fo);

static char const **    _prepare_mta_args(struct name *to, struct header *hp);

static struct name *fixhead(struct header *hp, struct name *tolist);
static int put_signature(FILE *fo, int convert);
static int attach_message(struct attachment *ap, FILE *fo);
static int make_multipart(struct header *hp, int convert, FILE *fi, FILE *fo,
                const char *contenttype, const char *charset);
static FILE *infix(struct header *hp, FILE *fi);
static int savemail(char const *name, FILE *fi);
static int sendmail_internal(void *v, int recipient_record);
static enum okay transfer(struct name *to, FILE *input, struct header *hp);
static enum okay start_mta(struct name *to, FILE *input, struct header *hp);
static void message_id(FILE *fo, struct header *hp);
static int fmt(char const *str, struct name *np, FILE *fo, int comma,
                int dropinvalid, int domime);
static int infix_resend(FILE *fi, FILE *fo, struct message *mp,
                struct name *to, int add_resent);

static enum okay
_putname(char const *line, enum gfield w, enum sendaction action,
        size_t *gotcha, char const *prefix, FILE *fo, struct name **xp)
{
        enum okay ret = STOP;
        struct name *np;

        np = lextract(line, GEXTRA|GFULL);
        if (xp)
                *xp = np;
        if (np == NULL)
                ;
        else if (fmt(prefix, np, fo, w & GCOMMA, 0, action != SEND_TODISP))
                ret = OKAY;
        else if (gotcha)
                ++(*gotcha);
        return (ret);
}

static char const *
_get_encoding(enum conversion const convert)
{
        char const *ret;
        switch (convert) {
        case CONV_7BIT:         ret = "7bit";                   break;
        case CONV_8BIT:         ret = "8bit";                   break;
        case CONV_TOQP:         ret = "quoted-printable";       break;
        case CONV_TOB64:        ret = "base64";                 break;
        default:                ret = NULL;                     break;
        }
        return (ret);
}

static int
_attach_file(struct attachment *ap, FILE *fo)
{
        /* TODO of course, the MIME classification needs to performed once
         * only, not for each and every charset anew ... ;-// */
        int err = 0;
        char *charset_iter_orig[2];
        long offs;

        /* Is this already in target charset? */
        if (ap->a_conv == AC_TMPFILE) {
                err = __attach_file(ap, fo);
                Fclose(ap->a_tmpf);
                goto jleave;
        }

        /* We "consume" *ap*, so directly adjust it as we need it */
        if (ap->a_conv == AC_FIX_INCS)
                ap->a_charset = ap->a_input_charset;

        if ((offs = ftell(fo)) < 0) {
                err = EIO;
                goto jleave;
        }

        charset_iter_recurse(charset_iter_orig);
        for (charset_iter_reset(NULL); charset_iter_next() != NULL;) {
                err = __attach_file(ap, fo);
                if (err == 0 || (err != EILSEQ && err != EINVAL))
                        break;
                clearerr(fo);
                if (fseek(fo, offs, SEEK_SET) < 0) {
                        err = EIO;
                        break;
                }
                if (ap->a_conv != AC_DEFAULT) {
                        err = EILSEQ;
                        break;
                }
                ap->a_charset = NULL;
        }
        charset_iter_restore(charset_iter_orig);
jleave:
        return err;
}

static int
__attach_file(struct attachment *ap, FILE *fo) /* XXX linelength */
{
        int err = 0, do_iconv;
        FILE *fi;
        char const *charset;
        enum conversion convert;
        char *buf;
        size_t bufsize, lncnt, inlen;

        /* Either charset-converted temporary file, or plain path */
        if (ap->a_conv == AC_TMPFILE) {
                fi = ap->a_tmpf;
                assert(ftell(fi) == 0x0l);
        } else if ((fi = Fopen(ap->a_name, "r")) == NULL) {
                err = errno;
                perror(ap->a_name);
                goto jleave;
        }

        /* MIME part header for attachment */
        {       char const *bn = ap->a_name, *ct;

                if ((ct = strrchr(bn, '/')) != NULL)
                        bn = ++ct;
                ct = ap->a_content_type;
                charset = ap->a_charset;
                convert = mime_classify_file(fi, (char const**)&ct, &charset,
                                &do_iconv);
                if (charset == NULL || ap->a_conv == AC_FIX_INCS ||
                                ap->a_conv == AC_TMPFILE)
                        do_iconv = 0;

                if (fprintf(fo, "\n--%s\nContent-Type: %s", send_boundary, ct)
                                < 0)
                        goto jerr_header;

                if (charset == NULL) {
                        if (putc('\n', fo) == EOF)
                                goto jerr_header;
                } else if (fprintf(fo, "; charset=%s\n", charset) < 0)
                        goto jerr_header;

                if (fprintf(fo, "Content-Transfer-Encoding: %s\n"
                                "Content-Disposition: %s;\n filename=\"",
                                _get_encoding(convert),
                                ap->a_content_disposition) < 0)
                        goto jerr_header;
                if (xmime_write(bn, strlen(bn), fo, CONV_TOHDR, TD_NONE, NULL)
                                < 0)
                        goto jerr_header;
                if (fwrite("\"\n", sizeof(char), 2, fo) != 2 * sizeof(char))
                        goto jerr_header;

                if (ap->a_content_id != NULL && fprintf(fo, "Content-ID: %s\n",
                                ap->a_content_id) < 0)
                        goto jerr_header;

                if (ap->a_content_description != NULL && fprintf(fo,
                                "Content-Description: %s\n",
                                ap->a_content_description) < 0)
                        goto jerr_header;

                if (putc('\n', fo) == EOF) {
jerr_header:            err = errno;
                        goto jerr_fclose;
                }
        }

#ifdef HAVE_ICONV
        if (iconvd != (iconv_t)-1)
                n_iconv_close(iconvd);
        if (do_iconv) {
                char const *tcs = charset_get_lc();
                if (asccasecmp(charset, tcs) != 0 &&
                                (iconvd = n_iconv_open(charset, tcs))
                                == (iconv_t)-1 && (err = errno) != 0) {
                        if (err == EINVAL)
                                fprintf(stderr, tr(179,
                                        "Cannot convert from %s to %s\n"),
                                        tcs, charset);
                        else
                                perror("iconv_open");
                        goto jerr_fclose;
                }
        }
#endif

        bufsize = INFIX_BUF;
        buf = smalloc(bufsize);
        if (convert == CONV_TOQP
#ifdef HAVE_ICONV
                        || iconvd != (iconv_t)-1
#endif
                        )
                lncnt = fsize(fi);
        for (;;) {
                if (convert == CONV_TOQP
#ifdef HAVE_ICONV
                                || iconvd != (iconv_t)-1
#endif
                                ) {
                        if (fgetline(&buf, &bufsize, &lncnt, &inlen, fi, 0)
                                        == NULL)
                                break;
                } else if ((inlen = fread(buf, sizeof *buf, bufsize, fi)) == 0)
                        break;
                if (xmime_write(buf, inlen, fo, convert, TD_ICONV, NULL) < 0) {
                        err = errno;
                        goto jerr;
                }
        }
        if (ferror(fi))
                err = EDOM;
jerr:
        free(buf);
jerr_fclose:
        if (ap->a_conv != AC_TMPFILE)
                Fclose(fi);
jleave:
        return (err);
}

static char const **
_prepare_mta_args(struct name *to, struct header *hp)
{
        size_t j, i = 4 + smopts_count + 2 + count(to) + 1;
        char const **args = salloc(i * sizeof(char*));

        args[0] = ok_vlook(sendmail_progname);
        if (args[0] == NULL || *args[0] == '\0')
                args[0] = SENDMAIL_PROGNAME;

        args[1] = "-i";
        i = 2;
        if (ok_blook(metoo))
                args[i++] = "-m";
        if (options & OPT_VERBOSE)
                args[i++] = "-v";

        for (j = 0; j < smopts_count; ++j, ++i)
                args[i] = smopts[j];

        /* -r option?  We may only pass skinned addresses, which is why we do
         * not simply call myorigin() (TODO myorigin shouldn't fullname!) */
        if (options & OPT_r_FLAG) {
                char const *froma;

                if (option_r_arg[0] != '\0')
                        froma = option_r_arg;
                else if (hp->h_from != NULL)
                        froma = hp->h_from->n_name;
                else
                        froma = myorigin(hp);
                if (froma != NULL) {
                        args[i++] = "-r";
                        args[i++] = froma;
                }
        }

        /* Receivers follow */
        for (; to != NULL; to = to->n_flink)
                if ((to->n_type & GDEL) == 0)
                        args[i++] = to->n_name;
        args[i] = NULL;
        return args;
}

/*
 * Fix the header by glopping all of the expanded names from
 * the distribution list into the appropriate fields.
 */
static struct name *
fixhead(struct header *hp, struct name *tolist)
{
        struct name *np;

        tolist = elide(tolist);

        hp->h_to = hp->h_cc = hp->h_bcc = NULL;
        for (np = tolist; np != NULL; np = np->n_flink)
                if (np->n_type & GDEL) {
#ifdef HAVE_DEBUG /* TODO LEGACY CODE */
                        assert(0); /* Shouldn't happen here, but later on :)) */
#else
                        continue;
#endif
                } else switch (np->n_type & GMASK) {
                case (GTO):
                        hp->h_to = cat(hp->h_to, ndup(np, np->n_type|GFULL));
                        break;
                case (GCC):
                        hp->h_cc = cat(hp->h_cc, ndup(np, np->n_type|GFULL));
                        break;
                case (GBCC):
                        hp->h_bcc = cat(hp->h_bcc, ndup(np, np->n_type|GFULL));
                        break;
                default:
                        break;
                }
        return (tolist);
}

/*
 * Put the signature file at fo. TODO send layer rewrite: *integrate in body*!!
 */
static int
put_signature(FILE *fo, int convert)
{
        char *sig, buf[INFIX_BUF], c = '\n';
        FILE *fsig;
        size_t sz;

        sig = ok_vlook(signature);
        if (sig == NULL || *sig == '\0')
                return 0;
        else if ((sig = file_expand(sig)) == NULL)
                return (-1);
        if ((fsig = Fopen(sig, "r")) == NULL) {
                perror(sig);
                return -1;
        }
        while ((sz = fread(buf, sizeof *buf, INFIX_BUF, fsig)) != 0) {
                c = buf[sz - 1];
                if (xmime_write(buf, sz, fo, convert, TD_NONE, NULL) < 0) {
                        perror(sig);
                        Fclose(fsig);
                        return -1;
                }
        }
        if (ferror(fsig)) {
                perror(sig);
                Fclose(fsig);
                return -1;
        }
        Fclose(fsig);
        if (c != '\n')
                putc('\n', fo);
        return 0;
}

/*
 * Attach a message to the file buffer.
 */
static int
attach_message(struct attachment *ap, FILE *fo)
{
        struct message *mp;

        fprintf(fo, "\n--%s\n"
                    "Content-Type: message/rfc822\n"
                    "Content-Disposition: inline\n", send_boundary);
        if (ap->a_content_description != NULL)
                fprintf(fo, "Content-Description: %s\n",
                        ap->a_content_description);
        fputc('\n', fo);

        mp = &message[ap->a_msgno - 1];
        touch(mp);
        if (sendmp(mp, fo, 0, NULL, SEND_RFC822, NULL) < 0)
                return -1;
        return 0;
}

/*
 * Generate the body of a MIME multipart message.
 */
static int
make_multipart(struct header *hp, int convert, FILE *fi, FILE *fo,
                const char *contenttype, const char *charset)
{
        struct attachment *att;

        fputs("This is a multi-part message in MIME format.\n", fo);
        if (fsize(fi) != 0) {
                char *buf;
                size_t sz, bufsize, cnt;

                fprintf(fo, "\n--%s\n", send_boundary);
                fprintf(fo, "Content-Type: %s", contenttype);
                if (charset)
                        fprintf(fo, "; charset=%s", charset);
                fprintf(fo, "\nContent-Transfer-Encoding: %s\n"
                                "Content-Disposition: inline\n\n",
                                _get_encoding(convert));
                buf = smalloc(bufsize = INFIX_BUF);
                if (convert == CONV_TOQP
#ifdef HAVE_ICONV
                                || iconvd != (iconv_t)-1
#endif
                                ) {
                        fflush(fi);
                        cnt = fsize(fi);
                }

                for (;;) {
                        if (convert == CONV_TOQP
#ifdef HAVE_ICONV
                                        || iconvd != (iconv_t)-1
#endif
                                        ) {
                                if (fgetline(&buf, &bufsize, &cnt, &sz, fi, 0)
                                                == NULL)
                                        break;
                        } else {
                                sz = fread(buf, sizeof *buf, bufsize, fi);
                                if (sz == 0)
                                        break;
                        }

                        if (xmime_write(buf, sz, fo, convert, TD_ICONV, NULL)
                                        < 0) {
                                free(buf);
                                return -1;
                        }
                }
                free(buf);
                if (ferror(fi))
                        return -1;
                if (charset != NULL)
                        put_signature(fo, convert);
        }
        for (att = hp->h_attach; att != NULL; att = att->a_flink) {
                if (att->a_msgno) {
                        if (attach_message(att, fo) != 0)
                                return -1;
                } else {
                        if (_attach_file(att, fo) != 0)
                                return -1;
                }
        }
        /* the final boundary with two attached dashes */
        fprintf(fo, "\n--%s--\n", send_boundary);
        return 0;
}

/*
 * Prepend a header in front of the collected stuff
 * and return the new file.
 */
static FILE *
infix(struct header *hp, FILE *fi) /* TODO check */
{
        FILE *nfo, *nfi;
        char *tempMail;
#ifdef HAVE_ICONV
        char const *tcs, *convhdr = NULL;
#endif
        enum conversion convert;
        char const *contenttype, *charset = NULL;
        int do_iconv = 0;

        if ((nfo = Ftemp(&tempMail, "Rs", "w", 0600, 1)) == NULL) {
                perror(tr(178, "temporary mail file"));
                return(NULL);
        }
        if ((nfi = Fopen(tempMail, "r")) == NULL) {
                perror(tempMail);
                Fclose(nfo);
        }
        rm(tempMail);
        Ftfree(&tempMail);
        if (nfi == NULL)
                return NULL;

        contenttype = "text/plain"; /* XXX mail body - always text/plain */
        convert = mime_classify_file(fi, &contenttype, &charset, &do_iconv);

#ifdef HAVE_ICONV
        tcs = charset_get_lc();
        if ((convhdr = need_hdrconv(hp, GTO|GSUBJECT|GCC|GBCC|GIDENT)) != 0) {
                if (iconvd != (iconv_t)-1)
                        n_iconv_close(iconvd);
                if (asccasecmp(convhdr, tcs) != 0 &&
                                (iconvd = n_iconv_open(convhdr, tcs))
                                == (iconv_t)-1 && errno != 0) {
                        if (errno == EINVAL)
                                fprintf(stderr, tr(179,
                                        "Cannot convert from %s to %s\n"),
                                        tcs, convhdr);
                        else
                                perror("iconv_open");
                        Fclose(nfo);
                        return NULL;
                }
        }
#endif
        if (puthead(hp, nfo,
                   GTO|GSUBJECT|GCC|GBCC|GNL|GCOMMA|GUA|GMIME
                   |GMSGID|GIDENT|GREF|GDATE,
                   SEND_MBOX, convert, contenttype, charset)) {
                Fclose(nfo);
                Fclose(nfi);
#ifdef HAVE_ICONV
                if (iconvd != (iconv_t)-1)
                        n_iconv_close(iconvd);
#endif
                return NULL;
        }
#ifdef HAVE_ICONV
        if (iconvd != (iconv_t)-1)
                n_iconv_close(iconvd);
        if (do_iconv && charset != NULL) { /*TODO charset->mime_classify_file*/
                int err;
                if (asccasecmp(charset, tcs) != 0 &&
                                (iconvd = n_iconv_open(charset, tcs))
                                == (iconv_t)-1 && (err = errno) != 0) {
                        if (err == EINVAL)
                                fprintf(stderr, tr(179,
                                        "Cannot convert from %s to %s\n"),
                                        tcs, charset);
                        else
                                perror("iconv_open");
                        Fclose(nfo);
                        return (NULL);
                }
        }
#endif
        if (hp->h_attach != NULL) {
                if (make_multipart(hp, convert, fi, nfo, contenttype, charset)
                                != 0) {
                        Fclose(nfo);
                        Fclose(nfi);
#ifdef HAVE_ICONV
                        if (iconvd != (iconv_t)-1)
                                n_iconv_close(iconvd);
#endif
                        return NULL;
                }
        } else {
                size_t sz, bufsize, cnt;
                char *buf;

                if (convert == CONV_TOQP
#ifdef HAVE_ICONV
                                || iconvd != (iconv_t)-1
#endif
                                ) {
                        fflush(fi);
                        cnt = fsize(fi);
                }
                buf = smalloc(bufsize = INFIX_BUF);
                for (;;) {
                        if (convert == CONV_TOQP
#ifdef HAVE_ICONV
                                        || iconvd != (iconv_t)-1
#endif
                                        ) {
                                if (fgetline(&buf, &bufsize, &cnt, &sz, fi, 0)
                                                == NULL)
                                        break;
                        } else {
                                sz = fread(buf, sizeof *buf, bufsize, fi);
                                if (sz == 0)
                                        break;
                        }
                        if (xmime_write(buf, sz, nfo, convert, TD_ICONV, NULL)
                                        < 0) {
                                Fclose(nfo);
                                Fclose(nfi);
#ifdef HAVE_ICONV
                                if (iconvd != (iconv_t)-1)
                                        n_iconv_close(iconvd);
#endif
                                free(buf);
                                return NULL;
                        }
                }
                free(buf);
                if (ferror(fi)) {
                        Fclose(nfo);
                        Fclose(nfi);
#ifdef HAVE_ICONV
                        if (iconvd != (iconv_t)-1)
                                n_iconv_close(iconvd);
#endif
                        return NULL;
                }
                if (charset != NULL)
                        put_signature(nfo, convert); /* XXX if (text/) !! */
        }
#ifdef HAVE_ICONV
        if (iconvd != (iconv_t)-1)
                n_iconv_close(iconvd);
#endif
        fflush(nfo);
        if (ferror(nfo)) {
                perror(tr(180, "temporary mail file"));
                Fclose(nfo);
                Fclose(nfi);
                return NULL;
        }
        Fclose(nfo);
        Fclose(fi);
        fflush(nfi);
        rewind(nfi);
        return(nfi);
}

/*
 * Save the outgoing mail on the passed file.
 */

/*ARGSUSED*/
static int
savemail(char const *name, FILE *fi)
{
        FILE *fo;
        char *buf;
        size_t bufsize, buflen, cnt;
        int prependnl = 0, error = 0;

        buf = smalloc(bufsize = LINESIZE);
        if ((fo = Zopen(name, "a+", NULL)) == NULL) {
                if ((fo = Zopen(name, "wx", NULL)) == NULL) {
                        perror(name);
                        free(buf);
                        return (-1);
                }
        } else {
                if (fseek(fo, -2L, SEEK_END) == 0) {
                        switch (fread(buf, sizeof *buf, 2, fo)) {
                        case 2:
                                if (buf[1] != '\n') {
                                        prependnl = 1;
                                        break;
                                }
                                /*FALLTHRU*/
                        case 1:
                                if (buf[0] != '\n')
                                        prependnl = 1;
                                break;
                        default:
                                if (ferror(fo)) {
                                        perror(name);
                                        free(buf);
                                        return -1;
                                }
                        }
                        fflush(fo);
                        if (prependnl) {
                                putc('\n', fo);
                                fflush(fo);
                        }
                }
        }

        fprintf(fo, "From %s %s", myname, time_current.tc_ctime);
        buflen = 0;
        fflush(fi);
        rewind(fi);
        cnt = fsize(fi);
        while (fgetline(&buf, &bufsize, &cnt, &buflen, fi, 0) != NULL) {
#ifdef HAVE_DEBUG /* TODO assert legacy */
                assert(!is_head(buf, buflen));
#else
                if (is_head(buf, buflen))
                        putc('>', fo);
#endif
                fwrite(buf, sizeof *buf, buflen, fo);
        }
        if (buflen && *(buf + buflen - 1) != '\n')
                putc('\n', fo);
        putc('\n', fo);
        fflush(fo);
        if (ferror(fo)) {
                perror(name);
                error = -1;
        }
        if (Fclose(fo) != 0)
                error = -1;
        fflush(fi);
        rewind(fi);
        free(buf);
        return error;
}

/*
 * Interface between the argument list and the mail1 routine
 * which does all the dirty work.
 */
FL int
mail(struct name *to, struct name *cc, struct name *bcc,
                char *subject, struct attachment *attach,
                char *quotefile, int recipient_record)
{
        struct header head;
        struct str in, out;

        memset(&head, 0, sizeof head);
        /* The given subject may be in RFC1522 format. */
        if (subject != NULL) {
                in.s = subject;
                in.l = strlen(subject);
                mime_fromhdr(&in, &out, /* TODO ??? TD_ISPR |*/ TD_ICONV);
                head.h_subject = out.s;
        }
        if (! (options & OPT_t_FLAG)) {
                head.h_to = to;
                head.h_cc = cc;
                head.h_bcc = bcc;
        }
        head.h_attach = attach;
        mail1(&head, 0, NULL, quotefile, recipient_record, 0);
        if (subject != NULL)
                free(out.s);
        return 0;
}

/*
 * Send mail to a bunch of user names.  The interface is through
 * the mail routine below.
 */
static int
sendmail_internal(void *v, int recipient_record)
{
        char *str = v;
        struct header head;

        memset(&head, 0, sizeof head);
        head.h_to = lextract(str, GTO|GFULL);
        mail1(&head, 0, NULL, NULL, recipient_record, 0);
        return 0;
}

FL int
csendmail(void *v)
{
        return sendmail_internal(v, 0);
}

FL int
cSendmail(void *v)
{
        return sendmail_internal(v, 1);
}

static enum okay
transfer(struct name *to, FILE *input, struct header *hp)
{
        char o[LINESIZE], *cp;
        struct name *np;
        int cnt = 0;
        enum okay ok = OKAY;

        np = to;
        while (np) {
                snprintf(o, sizeof o, "smime-encrypt-%s", np->n_name);/* XXX */
                if ((cp = vok_vlook(o)) != NULL) {
#ifdef HAVE_SSL
                        struct name *nt;
                        FILE *ef;
                        if ((ef = smime_encrypt(input, cp, np->n_name)) != 0) {
                                nt = ndup(np, np->n_type & ~(GFULL|GSKIN));
                                if (start_mta(nt, ef, hp) != OKAY)
                                        ok = STOP;
                                Fclose(ef);
                        } else {
#else
                                fprintf(stderr, tr(225,
                                        "No SSL support compiled in.\n"));
                                ok = STOP;
#endif
                                fprintf(stderr, tr(38,
                                        "Message not sent to <%s>\n"),
                                        np->n_name);
                                _senderror = TRU1;
#ifdef HAVE_SSL
                        }
#endif
                        rewind(input);
                        if (np->n_flink)
                                np->n_flink->n_blink = np->n_blink;
                        if (np->n_blink)
                                np->n_blink->n_flink = np->n_flink;
                        if (np == to)
                                to = np->n_flink;
                        np = np->n_flink;
                } else {
                        cnt++;
                        np = np->n_flink;
                }
        }
        if (cnt) {
                if (ok_blook(smime_force_encryption) ||
                                start_mta(to, input, hp) != OKAY)
                        ok = STOP;
        }
        return ok;
}

/*
 * Start the Mail Transfer Agent
 * mailing to namelist and stdin redirected to input.
 */
static enum okay
start_mta(struct name *to, FILE *input, struct header *hp)
{
#ifdef HAVE_SMTP
        char *user = NULL, *password = NULL, *skinned = NULL;
#endif
        char const **args = NULL, **t, *mta;
        char *smtp;
        enum okay ok = STOP;
        pid_t pid;
        sigset_t nset;
        (void)hp;

        if ((smtp = ok_vlook(smtp)) == NULL) {
                if ((mta = ok_vlook(sendmail)) != NULL) {
                        if ((mta = file_expand(mta)) == NULL)
                                goto jstop;
                } else
                        mta = SENDMAIL;

                args = _prepare_mta_args(to, hp);
                if (options & OPT_DEBUG) {
                        printf(tr(181, "Sendmail arguments:"));
                        for (t = args; *t != NULL; t++)
                                printf(" \"%s\"", *t);
                        printf("\n");
                        ok = OKAY;
                        goto jleave;
                }
        } else {
                mta = NULL; /* Silence cc */
#ifndef HAVE_SMTP
                fputs(tr(194, "No SMTP support compiled in.\n"), stderr);
                goto jstop;
#else
                skinned = skin(myorigin(hp));
                if ((user = smtp_auth_var("-user", skinned)) != NULL &&
                                (password = smtp_auth_var("-password",
                                        skinned)) == NULL)
                        password = getpassword(NULL);
#endif
        }

        /*
         * Fork, set up the temporary mail file as standard
         * input for "mail", and exec with the user list we generated
         * far above.
         */
        if ((pid = fork()) == -1) {
                perror("fork");
jstop:          savedeadletter(input, 0);
                _senderror = TRU1;
                goto jleave;
        }
        if (pid == 0) {
                sigemptyset(&nset);
                sigaddset(&nset, SIGHUP);
                sigaddset(&nset, SIGINT);
                sigaddset(&nset, SIGQUIT);
                sigaddset(&nset, SIGTSTP);
                sigaddset(&nset, SIGTTIN);
                sigaddset(&nset, SIGTTOU);
                freopen("/dev/null", "r", stdin);
#ifdef HAVE_SMTP
                if (smtp != NULL) {
                        prepare_child(&nset, 0, 1);
                        if (smtp_mta(smtp, to, input, hp,
                                        user, password, skinned) == 0)
                                _exit(0);
                } else {
#endif
                        prepare_child(&nset, fileno(input), -1);
                        /* If *record* is set then savemail() will move the
                         * file position; it'll call rewind(), but that may
                         * optimize away the systemcall if possible, and since
                         * dup2() shares the position with the original FD the
                         * MTA may end up reading nothing */
                        lseek(0, 0, SEEK_SET);
                        execv(mta, UNCONST(args));
                        perror(mta);
#ifdef HAVE_SMTP
                }
#endif
                savedeadletter(input, 1);
                fputs(tr(182, ". . . message not sent.\n"), stderr);
                _exit(1);
        }
        if ((options & (OPT_DEBUG | OPT_VERBOSE | OPT_BATCH_FLAG)) ||
                        ok_blook(sendwait)) {
                if (wait_child(pid, NULL))
                        ok = OKAY;
                else
                        _senderror = TRU1;
        } else {
                ok = OKAY;
                free_child(pid);
        }
jleave:
        return ok;
}

/*
 * Record outgoing mail if instructed to do so.
 */
static enum okay
mightrecord(FILE *fp, struct name *to, int recipient_record)
{
        char *cp, *cq;
        char const *ep;

        if (recipient_record) {
                size_t i = strlen(cq = skinned_name(to)) + 1;
                cp = salloc(i);
                memcpy(cp, cq, i);
                for (cq = cp; *cq && *cq != '@'; cq++)
                        ;
                *cq = '\0';
        } else
                cp = ok_vlook(record);
        if (cp != NULL) {
                ep = expand(cp);
                if (ep == NULL) {
                        ep = "NULL";
                        goto jbail;
                }
                if (ok_blook(outfolder) && *ep != '/' && *ep != '+' &&
                                which_protocol(ep) == PROTO_FILE) {
                        size_t i = strlen(cp);
                        cq = salloc(i + 2);
                        cq[0] = '+';
                        memcpy(cq + 1, cp, i + 1);
                        cp = cq;
                        ep = expand(cp); /* TODO file_expand() possible? */
                        if (ep == NULL) {
                                ep = "NULL";
                                goto jbail;
                        }
                }
                if (savemail(ep, fp) != 0) {
jbail:                  fprintf(stderr, tr(285,
                                "Failed to save message in %s - "
                                "message not sent\n"), ep);
                        exit_status |= 1;
                        savedeadletter(fp, 1);
                        return STOP;
                }
        }
        return OKAY;
}

/*
 * Mail a message on standard input to the people indicated
 * in the passed header.  (Internal interface).
 */
FL enum okay
mail1(struct header *hp, int printheaders, struct message *quote,
        char *quotefile, int recipient_record, int doprefix)
{
        enum okay ok = STOP;
        struct name *to;
        FILE *mtf, *nmtf;
        int dosign = -1, err;
        char const *cp;

        _senderror = FAL0;

        /* Update some globals we likely need first */
        time_current_update(&time_current, TRU1);

        /*  */
        if ((cp = ok_vlook(autocc)) != NULL && *cp)
                hp->h_cc = cat(hp->h_cc, checkaddrs(lextract(cp, GCC|GFULL)));
        if ((cp = ok_vlook(autobcc)) != NULL && *cp)
                hp->h_bcc = cat(hp->h_bcc, checkaddrs(lextract(cp,GBCC|GFULL)));

        /*
         * Collect user's mail from standard input.
         * Get the result as mtf.
         */
        mtf = collect(hp, printheaders, quote, quotefile, doprefix);
        if (mtf == NULL)
                goto j_leave;

        if (options & OPT_INTERACTIVE) {
                err = (ok_blook(bsdcompat) || ok_blook(askatend));
                if (err == 0)
                        goto jaskeot;
                if (ok_blook(askcc))
                        ++err, grab_headers(hp, GCC, 1);
                if (ok_blook(askbcc))
                        ++err, grab_headers(hp, GBCC, 1);
                if (ok_blook(askattach))
                        ++err, hp->h_attach = edit_attachments(hp->h_attach);
                if (ok_blook(asksign))
                        ++err, dosign = yorn(tr(35,
                                "Sign this message (y/n)? "));
                if (err == 1) {
jaskeot:
                        printf(tr(183, "EOT\n"));
                        fflush(stdout);
                }
        }

        if (fsize(mtf) == 0) {
                if (options & OPT_E_FLAG)
                        goto jleave;
                if (hp->h_subject == NULL)
                        printf(tr(184,
                                "No message, no subject; hope that's ok\n"));
                else if (ok_blook(bsdcompat) || ok_blook(bsdmsgs))
                        printf(tr(185, "Null message body; hope that's ok\n"));
        }

        if (dosign < 0)
                dosign = ok_blook(smime_sign);
#ifndef HAVE_SSL
        if (dosign) {
                fprintf(stderr, tr(225, "No SSL support compiled in.\n"));
                goto jleave;
        }
#endif

        /* XXX Update time_current again; once collect() offers editing of more
         * XXX headers, including Date:, this must only happen if Date: is the
         * XXX same that it was before collect() (e.g., postponing etc.).
         * XXX But *do* update otherwise because the mail seems to be backdated
         * XXX if the user edited some time, which looks odd and it happened
         * XXX to me that i got mis-dated response mails due to that... */
        time_current_update(&time_current, TRU1);

        /* TODO hrmpf; the MIME/send layer rewrite MUST address the init crap:
         * TODO setup the header ONCE; note this affects edit.c, collect.c ...,
         * TODO but: offer a hook that rebuilds/expands/checks/fixates all
         * TODO header fields ONCE, call that ONCE after user editing etc. has
         * TODO completed (one edit cycle) */

        /*
         * Take the user names from the combined to and cc lists and do all the
         * alias processing.  The POSIX standard says:
         *   The names shall be substituted when alias is used as a recipient
         *   address specified by the user in an outgoing message (that is,
         *   other recipients addressed indirectly through the reply command
         *   shall not be substituted in this manner).
         * S-nail thus violates POSIX, as has been pointed out correctly by
         * Martin Neitzel, but logic, usability und intellectual penetration of
         * POSIX standards is disputable anyway.  Go for user friendliness.
         */

        /* Do alias expansion on Reply-To: members, too (Martin Neitzel) */
        /* TODO puthead() YET (!!! see ONCE note above) expands the value, but
         * TODO doesn't perform alias expansion; encapsulate in the ONCE-o */
        if (hp->h_replyto == NULL && (cp = ok_vlook(replyto)) != NULL)
                hp->h_replyto = checkaddrs(lextract(cp, GEXTRA | GFULL));
        if (hp->h_replyto != NULL)
                hp->h_replyto = elide(usermap(hp->h_replyto, TRU1));

        /*
         * TODO what happens now is that all recipients are merged into
         * TODO a duplicated list with expanded aliases, then this list is
         * TODO splitted again into the three individual recipient lists (with
         * TODO duplicates removed).
         * TODO later on we use the merged list for outof() pipe/file saving,
         * TODO then we eliminate duplicates (again) and then we use that one
         * TODO for mightrecord() and transfer(), and again.  ... Please ...
         */
        /*
         * NOTE: Due to elide() in fixhead(), ENSURE to,cc,bcc order of to!,
         * because otherwise the recipients will be "degraded" if they occur
         * multiple times
         */
        to = usermap(cat(hp->h_to, cat(hp->h_cc, hp->h_bcc)), FAL0);
        if (to == NULL) {
                fprintf(stderr, tr(186, "No recipients specified\n"));
                _senderror = TRU1;
        }
        to = fixhead(hp, to);

        /*
         * 'Bit ugly kind of control flow until we find a charset that does it.
         * XXX Can maybe be done nicer once we have a carrier struct instead
         * XXX of globals
         */
        for (charset_iter_reset(hp->h_charset);;) {
                if (charset_iter_next() == NULL)
                        ;
                else if ((nmtf = infix(hp, mtf)) != NULL)
                        break;
                else if ((err = errno) == EILSEQ || err == EINVAL) {
                        rewind(mtf);
                        continue;
                }

                perror("");
#ifdef HAVE_SSL
jfail_dead:
#endif
                _senderror = TRU1;
                savedeadletter(mtf, 1);
                fputs(tr(187, ". . . message not sent.\n"), stderr);
                goto jleave;
        }

        mtf = nmtf;
#ifdef HAVE_SSL
        if (dosign) {
                if ((nmtf = smime_sign(mtf, hp)) == NULL)
                        goto jfail_dead;
                Fclose(mtf);
                mtf = nmtf;
        }
#endif

        /*
         * Look through the recipient list for names with /'s
         * in them which we write to as files directly.
         */
        to = outof(to, mtf, hp, &_senderror);
        if (_senderror)
                savedeadletter(mtf, 0);
        to = elide(to); /* XXX needed only to drop GDELs due to outof()! */
        if (count(to) == 0) {
                if (! _senderror)
                        ok = OKAY;
                goto jleave;
        }

        if (mightrecord(mtf, to, recipient_record) != OKAY)
                goto jleave;
        ok = transfer(to, mtf, hp);

jleave:
        Fclose(mtf);
j_leave:
        if (_senderror)
                exit_status |= EXIT_SEND_ERROR;
        return ok;
}

/*
 * Create a Message-Id: header field.
 * Use either the host name or the from address.
 */
static void
message_id(FILE *fo, struct header *hp)
{
        char const *h;
        size_t rl;
        struct tm *tmp;

        if (ok_blook(message_id_disable))
                goto jleave;
        if ((h = ok_vlook(hostname)) != NULL)
                rl = 24;
        else if ((h = skin(myorigin(hp))) != NULL && strchr(h, '@') != NULL)
                rl = 16;
        else
                /* Up to MTA */
                goto jleave;

        tmp = &time_current.tc_gm;
        fprintf(fo, "Message-ID: <%04d%02d%02d%02d%02d%02d.%s%c%s>\n",
                tmp->tm_year + 1900, tmp->tm_mon + 1, tmp->tm_mday,
                        tmp->tm_hour, tmp->tm_min, tmp->tm_sec,
                getrandstring(rl), (rl == 16 ? '%' : '@'), h);
jleave:
        ;
}

/*
 * Create a Date: header field.
 * We compare the localtime() and gmtime() results to get the timezone,
 * because numeric timezones are easier to read and because $TZ is
 * not set on most GNU systems.
 */
FL int
mkdate(FILE *fo, const char *field)
{
        struct tm *tmptr;
        int tzdiff, tzdiff_hour, tzdiff_min;

        tzdiff = time_current.tc_time - mktime(&time_current.tc_gm);
        tzdiff_hour = (int)(tzdiff / 60);
        tzdiff_min = tzdiff_hour % 60;
        tzdiff_hour /= 60;
        tmptr = &time_current.tc_local;
        if (tmptr->tm_isdst > 0)
                tzdiff_hour++;
        return fprintf(fo, "%s: %s, %02d %s %04d %02d:%02d:%02d %+05d\n",
                        field,
                        weekday_names[tmptr->tm_wday],
                        tmptr->tm_mday, month_names[tmptr->tm_mon],
                        tmptr->tm_year + 1900, tmptr->tm_hour,
                        tmptr->tm_min, tmptr->tm_sec,
                        tzdiff_hour * 100 + tzdiff_min);
}

#define FMT_CC_AND_BCC  { \
                                if (hp->h_cc != NULL && w & GCC) { \
                                        if (fmt("Cc:", hp->h_cc, fo, \
                                                        w&(GCOMMA|GFILES), 0, \
                                                        action!=SEND_TODISP)) \
                                                return 1; \
                                        gotcha++; \
                                } \
                                if (hp->h_bcc != NULL && w & GBCC) { \
                                        if (fmt("Bcc:", hp->h_bcc, fo, \
                                                        w&(GCOMMA|GFILES), 0, \
                                                        action!=SEND_TODISP)) \
                                                return 1; \
                                        gotcha++; \
                                } \
                        }
/*
 * Dump the to, subject, cc header on the
 * passed file buffer.
 */
FL int
puthead(struct header *hp, FILE *fo, enum gfield w,
                enum sendaction action, enum conversion convert,
                char const *contenttype, char const *charset)
{
        char const *addr;
        int stealthmua;
        size_t gotcha, l;
        struct name *np, *fromfield = NULL, *senderfield = NULL;

        if ((addr = ok_vlook(stealthmua)) != NULL) {
                stealthmua = (strcmp(addr, "noagent") == 0) ? -1 : 1;
        } else
                stealthmua = 0;
        gotcha = 0;
        if (w & GDATE) {
                mkdate(fo, "Date"), gotcha++;
        }
        if (w & GIDENT) {
                if (hp->h_from != NULL) {
                        if (fmt("From:", hp->h_from, fo, w&(GCOMMA|GFILES), 0,
                                                action!=SEND_TODISP))
                                return 1;
                        gotcha++;
                        fromfield = hp->h_from;
                } else if ((addr = myaddrs(hp)) != NULL) {
                        if (_putname(addr, w, action, &gotcha, "From:", fo,
                                                &fromfield))
                                return 1;
                        hp->h_from = fromfield;
                }
                if (((addr = hp->h_organization) != NULL ||
                                (addr = ok_vlook(ORGANIZATION)) != NULL) &&
                                (l = strlen(addr)) > 0) {
                        fwrite("Organization: ", sizeof (char), 14, fo);
                        if (xmime_write(addr, l, fo,
                                        action == SEND_TODISP ?
                                                CONV_NONE:CONV_TOHDR,
                                        action == SEND_TODISP ?
                                                TD_ISPR|TD_ICONV:TD_ICONV,
                                        NULL) < 0)
                                return 1;
                        gotcha++;
                        putc('\n', fo);
                }
                /* TODO see the ONCE TODO note somewhere around this file;
                 * TODO but anyway, do NOT perform alias expansion UNLESS
                 * TODO we are actually sending out! */
                if (hp->h_replyto != NULL) {
                        if (fmt("Reply-To:", hp->h_replyto, fo, w & GCOMMA, 0,
                                        action!=SEND_TODISP))
                                return 1;
                        gotcha++;
                } else if ((addr = ok_vlook(replyto)) != NULL)
                        if (_putname(addr, w, action, &gotcha, "Reply-To:", fo,
                                                NULL))
                                return 1;
                if (hp->h_sender != NULL) {
                        if (fmt("Sender:", hp->h_sender, fo, w & GCOMMA, 0,
                                        action!=SEND_TODISP))
                                return 1;
                        gotcha++;
                        senderfield = hp->h_sender;
                } else if ((addr = ok_vlook(sender)) != NULL)
                        if (_putname(addr, w, action, &gotcha, "Sender:", fo,
                                                &senderfield))
                                return 1;
                if (check_from_and_sender(fromfield, senderfield))
                        return 1;
        }
        if (hp->h_to != NULL && w & GTO) {
                if (fmt("To:", hp->h_to, fo, w&(GCOMMA|GFILES), 0,
                                        action!=SEND_TODISP))
                        return 1;
                gotcha++;
        }
        if (!ok_blook(bsdcompat) && !ok_blook(bsdorder))
                FMT_CC_AND_BCC
        if (hp->h_subject != NULL && w & GSUBJECT) {
                fwrite("Subject: ", sizeof (char), 9, fo);
                if (ascncasecmp(hp->h_subject, "re: ", 4) == 0) {
                        fwrite("Re: ", sizeof (char), 4, fo);
                        if (strlen(hp->h_subject + 4) > 0 &&
                                xmime_write(hp->h_subject + 4,
                                        strlen(hp->h_subject + 4), fo,
                                        action == SEND_TODISP ?
                                                CONV_NONE:CONV_TOHDR,
                                        action == SEND_TODISP ?
                                                TD_ISPR|TD_ICONV:TD_ICONV,
                                        NULL) < 0)
                                return 1;
                } else if (*hp->h_subject) {
                        if (xmime_write(hp->h_subject, strlen(hp->h_subject),
                                        fo, action == SEND_TODISP ?
                                                CONV_NONE:CONV_TOHDR,
                                        action == SEND_TODISP ?
                                                TD_ISPR|TD_ICONV:TD_ICONV,
                                        NULL) < 0)
                                return 1;
                }
                gotcha++;
                fwrite("\n", sizeof (char), 1, fo);
        }
        if (ok_blook(bsdcompat) || ok_blook(bsdorder))
                FMT_CC_AND_BCC
        if (w & GMSGID && stealthmua <= 0)
                message_id(fo, hp), gotcha++;
        if ((np = hp->h_ref) != NULL && w & GREF) {
                fmt("References:", np, fo, 0, 1, 0);
                if (np->n_name) {
                        while (np->n_flink)
                                np = np->n_flink;
                        if (is_addr_invalid(np, 0) == 0) {
                                fprintf(fo, "In-Reply-To: %s\n", np->n_name);
                                gotcha++;
                        }
                }
        }
        if (w & GUA && stealthmua == 0)
                fprintf(fo, "User-Agent: %s %s\n", uagent, version), gotcha++;
        if (w & GMIME) {
                fputs("MIME-Version: 1.0\n", fo), gotcha++;
                if (hp->h_attach != NULL) {
                        send_boundary = mime_create_boundary();/*TODO carrier*/
                        fprintf(fo, "Content-Type: multipart/mixed;\n"
                                " boundary=\"%s\"\n", send_boundary);
                } else {
                        fprintf(fo, "Content-Type: %s", contenttype);
                        if (charset)
                                fprintf(fo, "; charset=%s", charset);
                        fprintf(fo, "\nContent-Transfer-Encoding: %s\n",
                                        _get_encoding(convert));
                }
        }
        if (gotcha && w & GNL)
                putc('\n', fo);
        return(0);
}

/*
 * Format the given header line to not exceed 72 characters.
 */
static int
fmt(char const *str, struct name *np, FILE *fo, int flags, int dropinvalid,
        int domime)
{
        enum {
                m_INIT  = 1<<0,
                m_COMMA = 1<<1,
                m_NOPF  = 1<<2,
                m_CSEEN = 1<<3
        } m = (flags & GCOMMA) ? m_COMMA : 0;
        ssize_t col, len;

        col = strlen(str);
        if (col) {
                fwrite(str, sizeof *str, col, fo);
                if (flags & GFILES)
                        goto jstep;
                if (col == 9 && asccasecmp(str, "reply-to:") == 0) {
                        m |= m_NOPF;
                        goto jstep;
                }
                if (ok_blook(add_file_recipients))
                        goto jstep;
                if ((col == 3 && ((asccasecmp(str, "to:") == 0) ||
                                        asccasecmp(str, "cc:") == 0)) ||
                                (col == 4 && asccasecmp(str, "bcc:") == 0) ||
                                (col == 10 &&
                                        asccasecmp(str, "Resent-To:") == 0))
                        m |= m_NOPF;
        }

jstep:
        for (; np != NULL; np = np->n_flink) {
                if ((m & m_NOPF) && is_fileorpipe_addr(np))
                        continue;
                if (is_addr_invalid(np, ! dropinvalid)) {
                        if (dropinvalid)
                                continue;
                        else
                                return (1);
                }
                if ((m & (m_INIT | m_COMMA)) == (m_INIT | m_COMMA)) {
                        putc(',', fo);
                        m |= m_CSEEN;
                        ++col;
                }
                len = strlen(np->n_fullname);
                ++col; /* The separating space */
                if ((m & m_INIT) && col > 1 && col + len > 72) {
                        fputs("\n ", fo);
                        col = 1;
                        m &= ~m_CSEEN;
                } else
                        putc(' ', fo);
                m = (m & ~m_CSEEN) | m_INIT;
                len = xmime_write(np->n_fullname, len, fo,
                                domime?CONV_TOHDR_A:CONV_NONE,
                                TD_ICONV, NULL);
                if (len < 0)
                        return (1);
                col += len;
        }
        putc('\n', fo);
        return (0);
}

/*
 * Rewrite a message for resending, adding the Resent-Headers.
 */
static int
infix_resend(FILE *fi, FILE *fo, struct message *mp, struct name *to,
                int add_resent)
{
        size_t cnt, c, bufsize = 0;
        char *buf = NULL;
        char const *cp;
        struct name *fromfield = NULL, *senderfield = NULL;

        cnt = mp->m_size;
        /*
         * Write the Resent-Fields.
         */
        if (add_resent) {
                fputs("Resent-", fo);
                mkdate(fo, "Date");
                if ((cp = myaddrs(NULL)) != NULL) {
                        if (_putname(cp, GCOMMA, SEND_MBOX, NULL,
                                        "Resent-From:", fo, &fromfield))
                                return 1;
                }
                if ((cp = ok_vlook(sender)) != NULL) {
                        if (_putname(cp, GCOMMA, SEND_MBOX, NULL,
                                        "Resent-Sender:", fo, &senderfield))
                                return 1;
                }
                if (fmt("Resent-To:", to, fo, 1, 1, 0))
                        return 1;
                if ((cp = ok_vlook(stealthmua)) == NULL ||
                                strcmp(cp, "noagent") == 0) {
                        fputs("Resent-", fo);
                        message_id(fo, NULL);
                }
        }
        if (check_from_and_sender(fromfield, senderfield))
                return 1;
        /*
         * Write the original headers.
         */
        while (cnt > 0) {
                if (fgetline(&buf, &bufsize, &cnt, &c, fi, 0) == NULL)
                        break;
                /* XXX more checks: The From_ line may be seen when resending */
                if (ascncasecmp("status: ", buf, 8) != 0 &&
                                strncmp("From ", buf, 5) != 0
                                /* In the headers, is_head() is actually
                                 * overkill, so a simple ^From_ is sufficient.
                                 * ! is_head(buf, c) */
                                )
                        fwrite(buf, sizeof *buf, c, fo);
                if (cnt > 0 && *buf == '\n')
                        break;
        }
        /*
         * Write the message body.
         */
        while (cnt > 0) {
                if (fgetline(&buf, &bufsize, &cnt, &c, fi, 0) == NULL)
                        break;
                if (cnt == 0 && *buf == '\n')
                        break;
                fwrite(buf, sizeof *buf, c, fo);
        }
        if (buf)
                free(buf);
        if (ferror(fo)) {
                perror(tr(188, "temporary mail file"));
                return 1;
        }
        return 0;
}

FL enum okay
resend_msg(struct message *mp, struct name *to, int add_resent) /* TODO check */
{
        enum okay ok = STOP;
        FILE *ibuf, *nfo, *nfi;
        char *tempMail;
        struct header head;

        _senderror = FAL0;

        /* Update some globals we likely need first */
        time_current_update(&time_current, TRU1);

        memset(&head, 0, sizeof head);

        if ((to = checkaddrs(to)) == NULL) {
                _senderror = TRU1;
                goto jleave;
        }

        if ((nfo = Ftemp(&tempMail, "Rs", "w", 0600, 1)) == NULL) {
                _senderror = TRU1;
                perror(tr(189, "temporary mail file"));
                goto jleave;
        }
        if ((nfi = Fopen(tempMail, "r")) == NULL) {
                _senderror = TRU1;
                perror(tempMail);
        }
        rm(tempMail);
        Ftfree(&tempMail);
        if (nfi == NULL)
                goto jerr_o;

        if ((ibuf = setinput(&mb, mp, NEED_BODY)) == NULL)
                goto jerr_all;
        head.h_to = to;
        to = fixhead(&head, to);
        if (infix_resend(ibuf, nfo, mp, head.h_to, add_resent) != 0) {
                savedeadletter(nfi, 1);
                fputs(tr(190, ". . . message not sent.\n"), stderr);
jerr_all:
                Fclose(nfi);
jerr_o:
                Fclose(nfo);
                _senderror = TRU1;
                goto jleave;
        }
        Fclose(nfo);
        rewind(nfi);
        to = outof(to, nfi, &head, &_senderror);
        if (_senderror)
                savedeadletter(nfi, 0);
        to = elide(to); /* TODO should have been done in fixhead()? */
        if (count(to) != 0) {
                if (!ok_blook(record_resent) || mightrecord(nfi, to, 0) == OKAY)
                        ok = transfer(to, nfi, NULL);
        } else if (! _senderror)
                ok = OKAY;
        Fclose(nfi);
jleave:
        if (_senderror)
                exit_status |= EXIT_SEND_ERROR;
        return ok;
}