cmd3.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Still more user commands.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2015 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
   6  */
   7 /*
   8  * Copyright (c) 1980, 1993
   9  *      The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35 #undef n_FILE
  36 #define n_FILE cmd3
  37
  38 #ifndef HAVE_AMALGAMATION
  39 # include "nail.h"
  40 #endif
  41
  42 static char                *_bang_buf;
  43 static size_t              _bang_size;
  44
  45 /* Modify subject we reply to to begin with Re: if it does not already */
  46 static char *     _reedit(char *subj);
  47
  48 /* Expand the shell escape by expanding unescaped !'s into the last issued
  49  * command where possible */
  50 static void       _bangexp(char **str, size_t *size);
  51
  52 static void       make_ref_and_cs(struct message *mp, struct header *head);
  53
  54 /* `reply' and `Lreply' workhorse */
  55 static int        _list_reply(int *msgvec, enum header_flags hf);
  56
  57 /* Get PTF to implementation of command c (i.e., take care for *flipr*) */
  58 static int (*     _reply_or_Reply(char c))(int *, bool_t);
  59
  60 /* Reply to a single message.  Extract each name from the message header and
  61  * send them off to mail1() */
  62 static int        _reply(int *msgvec, bool_t recipient_record);
  63
  64 /* Reply to a series of messages by simply mailing to the senders and not
  65  * messing around with the To: and Cc: lists as in normal reply */
  66 static int        _Reply(int *msgvec, bool_t recipient_record);
  67
  68 /* Forward a message to a new recipient, in the sense of RFC 2822 */
  69 static int        _fwd(char *str, int recipient_record);
  70
  71 /* Modify the subject we are replying to to begin with Fwd: */
  72 static char *     __fwdedit(char *subj);
  73
  74 /* Do the real work of resending */
  75 static int        _resend1(void *v, bool_t add_resent);
  76
  77 /* c_file, c_File */
  78 static int        _c_file(void *v, enum fedit_mode fm);
  79
  80 static char *
  81 _reedit(char *subj)
  82 {
  83    struct str in, out;
  84    char *newsubj = NULL;
  85    NYD_ENTER;
  86
  87    if (subj == NULL || *subj == '\0')
  88       goto jleave;
  89
  90    in.s = subj;
  91    in.l = strlen(subj);
  92    mime_fromhdr(&in, &out, TD_ISPR | TD_ICONV);
  93
  94    if ((newsubj = subject_re_trim(out.s)) != out.s)
  95       newsubj = savestr(out.s);
  96    else {
  97       /* RFC mandates english "Re: " */
  98       newsubj = salloc(out.l + 4 +1);
  99       sstpcpy(sstpcpy(newsubj, "Re: "), out.s);
 100    }
 101
 102    free(out.s);
 103 jleave:
 104    NYD_LEAVE;
 105    return newsubj;
 106 }
 107
 108 static void
 109 _bangexp(char **str, size_t *size)
 110 {
 111    char *bangbuf;
 112    int changed = 0;
 113    bool_t dobang;
 114    size_t sz, i, j, bangbufsize;
 115    NYD_ENTER;
 116
 117    dobang = ok_blook(bang);
 118
 119    bangbuf = smalloc(bangbufsize = *size);
 120    i = j = 0;
 121    while ((*str)[i]) {
 122       if (dobang) {
 123          if ((*str)[i] == '!') {
 124             if (_bang_buf != NULL) {
 125                sz = strlen(_bang_buf);
 126                bangbuf = srealloc(bangbuf, bangbufsize += sz);
 127                memcpy(bangbuf + j, _bang_buf, sz + 1);
 128                j += sz;
 129             }
 130             ++changed;
 131             i++;
 132             continue;
 133          }
 134       }
 135       if ((*str)[i] == '\\' && (*str)[i + 1] == '!') {
 136          bangbuf[j++] = '!';
 137          i += 2;
 138          ++changed;
 139       }
 140       bangbuf[j++] = (*str)[i++];
 141    }
 142    bangbuf[j] = '\0';
 143    if (changed) {
 144       printf("!%s\n", bangbuf);
 145       fflush(stdout);
 146    }
 147    sz = j + 1;
 148    if (sz > *size)
 149       *str = srealloc(*str, *size = sz);
 150    memcpy(*str, bangbuf, sz);
 151    if (sz > _bang_size)
 152       _bang_buf = srealloc(_bang_buf, _bang_size = sz);
 153    memcpy(_bang_buf, bangbuf, sz);
 154    free(bangbuf);
 155    NYD_LEAVE;
 156 }
 157
 158 static void
 159 make_ref_and_cs(struct message *mp, struct header *head) /* TODO rewrite FAST */
 160 {
 161    char *oldref, *oldmsgid, *newref, *cp;
 162    size_t oldreflen = 0, oldmsgidlen = 0, reflen;
 163    unsigned i;
 164    struct name *n;
 165    NYD_ENTER;
 166
 167    oldref = hfield1("references", mp);
 168    oldmsgid = hfield1("message-id", mp);
 169    if (oldmsgid == NULL || *oldmsgid == '\0') {
 170       head->h_ref = NULL;
 171       goto jleave;
 172    }
 173
 174    reflen = 1;
 175    if (oldref) {
 176       oldreflen = strlen(oldref);
 177       reflen += oldreflen + 2;
 178    }
 179    if (oldmsgid) {
 180       oldmsgidlen = strlen(oldmsgid);
 181       reflen += oldmsgidlen;
 182    }
 183
 184    newref = smalloc(reflen);
 185    if (oldref != NULL) {
 186       memcpy(newref, oldref, oldreflen +1);
 187       if (oldmsgid != NULL) {
 188          newref[oldreflen++] = ',';
 189          newref[oldreflen++] = ' ';
 190          memcpy(newref + oldreflen, oldmsgid, oldmsgidlen +1);
 191       }
 192    } else if (oldmsgid)
 193       memcpy(newref, oldmsgid, oldmsgidlen +1);
 194    n = extract(newref, GREF);
 195    free(newref);
 196
 197    /* Limit number of references TODO better on parser side */
 198    while (n->n_flink != NULL)
 199       n = n->n_flink;
 200    for (i = 1; i <= REFERENCES_MAX; ++i) {
 201       if (n->n_blink != NULL)
 202          n = n->n_blink;
 203       else
 204          break;
 205    }
 206    n->n_blink = NULL;
 207    head->h_ref = n;
 208    if (ok_blook(reply_in_same_charset) &&
 209          (cp = hfield1("content-type", mp)) != NULL)
 210       head->h_charset = mime_param_get("charset", cp);
 211 jleave:
 212    NYD_LEAVE;
 213 }
 214
 215 static int
 216 _list_reply(int *msgvec, enum header_flags hf)
 217 {
 218    struct header head;
 219    struct message *mp;
 220    char const *reply_to, *rcv, *cp;
 221    enum gfield gf;
 222    struct name *rt, *mft, *np;
 223    int *save_msgvec;
 224    NYD_ENTER;
 225
 226    /* TODO Since we may recur and do stuff with message lists we need to save
 227     * TODO away the argument vector as long as that isn't done by machinery */
 228    {
 229       size_t i;
 230       for (i = 0; msgvec[i] != 0; ++i)
 231          ;
 232       ++i;
 233       save_msgvec = ac_alloc(sizeof(*save_msgvec) * i);
 234       while (i-- > 0)
 235          save_msgvec[i] = msgvec[i];
 236       msgvec = save_msgvec;
 237    }
 238
 239 jnext_msg:
 240    mp = message + *msgvec - 1;
 241    touch(mp);
 242    setdot(mp);
 243
 244    memset(&head, 0, sizeof head);
 245    head.h_flags = hf;
 246
 247    head.h_subject = _reedit(hfield1("subject", mp));
 248    gf = ok_blook(fullnames) ? GFULL : GSKIN;
 249    rt = mft = NULL;
 250
 251    rcv = NULL;
 252    if ((reply_to = hfield1("reply-to", mp)) != NULL &&
 253          (cp = ok_vlook(reply_to_honour)) != NULL &&
 254          (rt = checkaddrs(lextract(reply_to, GTO | gf), EACM_STRICT, NULL)
 255          ) != NULL) {
 256       char const *tr = _("Reply-To \"%s%s\"");
 257       size_t l = strlen(tr) + strlen(rt->n_name) + 3 +1;
 258       char *sp = salloc(l);
 259
 260       snprintf(sp, l, tr, rt->n_name, (rt->n_flink != NULL ? "..." : ""));
 261       if (quadify(cp, UIZ_MAX, sp, TRU1) > FAL0)
 262          rcv = reply_to;
 263    }
 264
 265    if (rcv == NULL && (rcv = hfield1("from", mp)) == NULL)
 266       rcv = nameof(mp, 1);
 267
 268    /* Cc: */
 269    np = NULL;
 270    if (ok_blook(recipients_in_cc) && (cp = hfield1("to", mp)) != NULL)
 271       np = lextract(cp, GCC | gf);
 272    if ((cp = hfield1("cc", mp)) != NULL)
 273       np = cat(np, lextract(cp, GCC | gf));
 274    if (np != NULL)
 275       head.h_cc = delete_alternates(np);
 276
 277    /* To: */
 278    np = NULL;
 279    if (rcv != NULL)
 280       np = (rcv == reply_to) ? namelist_dup(rt, GTO | gf)
 281             : lextract(rcv, GTO | gf);
 282    if (!ok_blook(recipients_in_cc) && (cp = hfield1("to", mp)) != NULL)
 283       np = cat(np, lextract(cp, GTO | gf));
 284    /* Delete my name from reply list, and with it, all my alternate names */
 285    np = delete_alternates(np);
 286    if (count(np) == 0)
 287       np = lextract(rcv, GTO | gf);
 288    head.h_to = np;
 289
 290    /* The user may have send this to himself, don't ignore that */
 291    namelist_vaporise_head(&head, EACM_NORMAL, FAL0, NULL);
 292    if (head.h_to == NULL)
 293       head.h_to = np;
 294
 295    /* Mail-Followup-To: */
 296    mft = NULL;
 297    if (ok_vlook(followup_to_honour) != NULL &&
 298          (cp = hfield1("mail-followup-to", mp)) != NULL &&
 299          (mft = np = checkaddrs(lextract(cp, GTO | gf), EACM_STRICT, NULL)
 300          ) != NULL) {
 301       char const *tr = _("Followup-To \"%s%s\"");
 302       size_t l = strlen(tr) + strlen(np->n_name) + 3 +1;
 303       char *sp = salloc(l);
 304
 305       snprintf(sp, l, tr, np->n_name, (np->n_flink != NULL ? "..." : ""));
 306       if (quadify(ok_vlook(followup_to_honour), UIZ_MAX, sp, TRU1) > FAL0) {
 307          head.h_cc = NULL;
 308          head.h_to = np;
 309          head.h_mft =
 310          mft = namelist_vaporise_head(&head, EACM_STRICT, FAL0, NULL);
 311       } else
 312          mft = NULL;
 313    }
 314
 315    /* Special massage for list (follow-up) messages */
 316    if (mft != NULL || (hf & HF_LIST_REPLY) || ok_blook(followup_to)) {
 317       /* Learn about a possibly sending mailing list; use do for break; */
 318       if ((cp = hfield1("list-post", mp)) != NULL) do {
 319          struct name *x;
 320
 321          if ((x = lextract(cp, GEXTRA | GSKIN)) == NULL || x->n_flink != NULL ||
 322                (cp = url_mailto_to_address(x->n_name)) == NULL ||
 323                /* XXX terribly wasteful to create a new name, and can't we find
 324                 * XXX a way to mitigate that?? */
 325                is_addr_invalid(x = nalloc(cp, GEXTRA | GSKIN), EACM_STRICT)) {
 326             if (options & OPT_D_V)
 327                n_err(_("Message contains invalid \"List-Post:\" header\n"));
 328             cp = NULL;
 329             break;
 330          }
 331          cp = x->n_name;
 332
 333          /* A special case has been seen on e.g. ietf-announce@ietf.org:
 334           * these usually post to multiple groups, with ietf-announce@
 335           * in List-Post:, but with Reply-To: set to ietf@ietf.org (since
 336           * -announce@ is only used for announcements, say).
 337           * So our desire is to honour this request and actively overwrite
 338           * List-Post: for our purpose; but only if its a single address.
 339           * However, to avoid ambiguities with users that place themselve in
 340           * Reply-To: and mailing lists which don't overwrite this (or only
 341           * extend this, shall such exist), only do so if reply_to exists of
 342           * a single address which points to the same domain as List-Post: */
 343          if (reply_to != NULL && rt->n_flink == NULL &&
 344                name_is_same_domain(x, rt))
 345             cp = rt->n_name; /* rt is EACM_STRICT tested */
 346
 347          /* "Automatically `mlist'" the List-Post: address temporarily */
 348          if (is_mlist(cp, FAL0) == MLIST_OTHER)
 349             head.h_list_post = cp;
 350          else
 351             cp = NULL;
 352       } while (0);
 353
 354       /* In case of list replies we actively sort out any non-list recipient,
 355        * but _only_ if we did not honour a MFT:, assuming that members of MFT
 356        * were there for a reason; cp is still List-Post:/eqivalent */
 357       if ((hf & HF_LIST_REPLY) && mft == NULL) {
 358          struct name *nhp = head.h_to;
 359          head.h_to = NULL;
 360 j_lt_redo:
 361          while (nhp != NULL) {
 362             np = nhp;
 363             nhp = nhp->n_flink;
 364
 365             if ((cp != NULL && !asccasecmp(cp, np->n_name)) ||
 366                   is_mlist(np->n_name, FAL0) != MLIST_OTHER) {
 367                np->n_type = (np->n_type & ~GMASK) | GTO;
 368                np->n_flink = head.h_to;
 369                head.h_to = np;
 370             }
 371          }
 372          if ((nhp = head.h_cc) != NULL) {
 373             head.h_cc = NULL;
 374             goto j_lt_redo;
 375          }
 376       }
 377    }
 378
 379    make_ref_and_cs(mp, &head);
 380
 381    if (ok_blook(quote_as_attachment)) {
 382       head.h_attach = csalloc(1, sizeof *head.h_attach);
 383       head.h_attach->a_msgno = *msgvec;
 384       head.h_attach->a_content_description = _("Original message content");
 385    }
 386
 387    if (mail1(&head, 1, mp, NULL, !!(hf & HF_RECIPIENT_RECORD), 0) == OKAY &&
 388          ok_blook(markanswered) && !(mp->m_flag & MANSWERED))
 389       mp->m_flag |= MANSWER | MANSWERED;
 390
 391    if (*++msgvec != 0) {
 392       /* TODO message (error) ring.., less sleep */
 393       printf(_("Waiting a second before proceeding to the next message..\n"));
 394       fflush(stdout);
 395       sleep(1);
 396       goto jnext_msg;
 397    }
 398
 399    ac_free(save_msgvec);
 400    NYD_LEAVE;
 401    return 0;
 402 }
 403
 404 static int
 405 (*_reply_or_Reply(char c))(int *, bool_t)
 406 {
 407    int (*rv)(int*, bool_t);
 408    NYD_ENTER;
 409
 410    rv = (ok_blook(flipr) ^ (c == 'R')) ? &_Reply : &_reply;
 411    NYD_LEAVE;
 412    return rv;
 413 }
 414
 415 static int
 416 _reply(int *msgvec, bool_t recipient_record)
 417 {
 418    int rv;
 419    NYD_ENTER;
 420
 421    rv = _list_reply(msgvec, recipient_record ? HF_RECIPIENT_RECORD : HF_NONE);
 422    NYD_LEAVE;
 423    return rv;
 424 }
 425
 426 static int
 427 _Reply(int *msgvec, bool_t recipient_record)
 428 {
 429    struct header head;
 430    struct message *mp;
 431    int *ap;
 432    char *cp;
 433    enum gfield gf;
 434    NYD_ENTER;
 435
 436    memset(&head, 0, sizeof head);
 437    gf = ok_blook(fullnames) ? GFULL : GSKIN;
 438
 439    for (ap = msgvec; *ap != 0; ++ap) {
 440       char const *rp;
 441       struct name *rt;
 442
 443       mp = message + *ap - 1;
 444       touch(mp);
 445       setdot(mp);
 446
 447       if ((rp = hfield1("reply-to", mp)) != NULL &&
 448             (cp = ok_vlook(reply_to_honour)) != NULL &&
 449             (rt = checkaddrs(lextract(rp, GTO | gf), EACM_STRICT, NULL)
 450             ) != NULL) {
 451          char const *tr = _("Reply-To \"%s%s\"");
 452          size_t l = strlen(tr) + strlen(rt->n_name) + 3 +1;
 453          char *sp = salloc(l);
 454
 455          snprintf(sp, l, tr, rt->n_name, (rt->n_flink != NULL ? "..." : ""));
 456          if (quadify(cp, UIZ_MAX, sp, TRU1) > FAL0) {
 457             head.h_to = cat(head.h_to, rt);
 458             continue;
 459          }
 460       }
 461
 462       if ((cp = hfield1("from", mp)) == NULL)
 463          cp = nameof(mp, 2);
 464       head.h_to = cat(head.h_to, lextract(cp, GTO | gf));
 465    }
 466    if (head.h_to == NULL)
 467       goto jleave;
 468
 469    mp = message + msgvec[0] - 1;
 470    head.h_subject = hfield1("subject", mp);
 471    head.h_subject = _reedit(head.h_subject);
 472    make_ref_and_cs(mp, &head);
 473
 474    if (ok_blook(quote_as_attachment)) {
 475       head.h_attach = csalloc(1, sizeof *head.h_attach);
 476       head.h_attach->a_msgno = *msgvec;
 477       head.h_attach->a_content_description = _("Original message content");
 478    }
 479
 480    if (mail1(&head, 1, mp, NULL, recipient_record, 0) == OKAY &&
 481          ok_blook(markanswered) && !(mp->m_flag & MANSWERED))
 482       mp->m_flag |= MANSWER | MANSWERED;
 483 jleave:
 484    NYD_LEAVE;
 485    return 0;
 486 }
 487
 488 static int
 489 _fwd(char *str, int recipient_record)
 490 {
 491    struct header head;
 492    int *msgvec, rv = 1;
 493    char *recipient;
 494    struct message *mp;
 495    bool_t f, forward_as_attachment;
 496    NYD_ENTER;
 497
 498    if ((recipient = laststring(str, &f, TRU1)) == NULL) {
 499       puts(_("No recipient specified."));
 500       goto jleave;
 501    }
 502
 503    forward_as_attachment = ok_blook(forward_as_attachment);
 504    msgvec = salloc((msgCount + 2) * sizeof *msgvec);
 505
 506    if (!f) {
 507       *msgvec = first(0, MMNORM);
 508       if (*msgvec == 0) {
 509          if (pstate & PS_HOOK_MASK) {
 510             rv = 0;
 511             goto jleave;
 512          }
 513          printf(_("No messages to forward.\n"));
 514          goto jleave;
 515       }
 516       msgvec[1] = 0;
 517    } else if (getmsglist(str, msgvec, 0) < 0)
 518       goto jleave;
 519
 520    if (*msgvec == 0) {
 521       if (pstate & PS_HOOK_MASK) {
 522          rv = 0;
 523          goto jleave;
 524       }
 525       printf(_("No applicable messages.\n"));
 526       goto jleave;
 527    }
 528    if (msgvec[1] != 0) {
 529       printf(_("Cannot forward multiple messages at once\n"));
 530       goto jleave;
 531    }
 532
 533    memset(&head, 0, sizeof head);
 534    if ((head.h_to = lextract(recipient,
 535          (GTO | (ok_blook(fullnames) ? GFULL : GSKIN)))) == NULL)
 536       goto jleave;
 537
 538    mp = message + *msgvec - 1;
 539
 540    if (forward_as_attachment) {
 541       head.h_attach = csalloc(1, sizeof *head.h_attach);
 542       head.h_attach->a_msgno = *msgvec;
 543       head.h_attach->a_content_description = _("Forwarded message");
 544    } else {
 545       touch(mp);
 546       setdot(mp);
 547    }
 548    head.h_subject = hfield1("subject", mp);
 549    head.h_subject = __fwdedit(head.h_subject);
 550    mail1(&head, 1, (forward_as_attachment ? NULL : mp), NULL, recipient_record,
 551       1);
 552    rv = 0;
 553 jleave:
 554    NYD_LEAVE;
 555    return rv;
 556 }
 557
 558 static char *
 559 __fwdedit(char *subj)
 560 {
 561    struct str in, out;
 562    char *newsubj = NULL;
 563    NYD_ENTER;
 564
 565    if (subj == NULL || *subj == '\0')
 566       goto jleave;
 567
 568    in.s = subj;
 569    in.l = strlen(subj);
 570    mime_fromhdr(&in, &out, TD_ISPR | TD_ICONV);
 571
 572    newsubj = salloc(out.l + 6);
 573    memcpy(newsubj, "Fwd: ", 5); /* XXX localizable */
 574    memcpy(newsubj + 5, out.s, out.l +1);
 575    free(out.s);
 576 jleave:
 577    NYD_LEAVE;
 578    return newsubj;
 579 }
 580
 581 static int
 582 _resend1(void *v, bool_t add_resent)
 583 {
 584    char *name, *str;
 585    struct name *to, *sn;
 586    int *ip, *msgvec;
 587    bool_t f = TRU1;
 588    NYD_ENTER;
 589
 590    str = v;
 591    msgvec = salloc((msgCount + 2) * sizeof *msgvec);
 592    name = laststring(str, &f, TRU1);
 593    if (name == NULL) {
 594       puts(_("No recipient specified."));
 595       goto jleave;
 596    }
 597
 598    if (!f) {
 599       *msgvec = first(0, MMNORM);
 600       if (*msgvec == 0) {
 601          if (pstate & PS_HOOK_MASK) {
 602             f = FAL0;
 603             goto jleave;
 604          }
 605          puts(_("No applicable messages."));
 606          goto jleave;
 607       }
 608       msgvec[1] = 0;
 609    } else if (getmsglist(str, msgvec, 0) < 0)
 610       goto jleave;
 611
 612    if (*msgvec == 0) {
 613       if (pstate & PS_HOOK_MASK) {
 614          f = FAL0;
 615          goto jleave;
 616       }
 617       printf("No applicable messages.\n");
 618       goto jleave;
 619    }
 620
 621    sn = nalloc(name, GTO | GSKIN);
 622    to = usermap(sn, FAL0);
 623    for (ip = msgvec; *ip != 0 && UICMP(z, PTR2SIZE(ip - msgvec), <, msgCount);
 624          ++ip)
 625       if (resend_msg(message + *ip - 1, to, add_resent) != OKAY)
 626          goto jleave;
 627    f = FAL0;
 628 jleave:
 629    NYD_LEAVE;
 630    return (f != FAL0);
 631 }
 632
 633 static int
 634 _c_file(void *v, enum fedit_mode fm)
 635 {
 636    char **argv = v;
 637    int i;
 638    NYD2_ENTER;
 639
 640    if (*argv == NULL) {
 641       newfileinfo();
 642       i = 0;
 643       goto jleave;
 644    }
 645
 646    if (pstate & PS_HOOK_MASK) {
 647       n_err(_("Cannot change folder from within a hook\n"));
 648       i = 1;
 649       goto jleave;
 650    }
 651
 652    save_mbox_for_possible_quitstuff();
 653
 654    i = setfile(*argv, fm);
 655    if (i < 0) {
 656       i = 1;
 657       goto jleave;
 658    }
 659    assert(!(fm & FEDIT_NEWMAIL));
 660    check_folder_hook(FAL0);
 661
 662    if (i > 0 && !ok_blook(emptystart)) {
 663       i = 1;
 664       goto jleave;
 665    }
 666    announce(ok_blook(bsdcompat) || ok_blook(bsdannounce));
 667    i = 0;
 668 jleave:
 669    NYD2_LEAVE;
 670    return i;
 671 }
 672
 673 FL int
 674 c_shell(void *v)
 675 {
 676    char const *sh = NULL;
 677    char *str = v, *cmd;
 678    size_t cmdsize;
 679    sigset_t mask;
 680    sighandler_type sigint;
 681    NYD_ENTER;
 682
 683    cmd = smalloc(cmdsize = strlen(str) +1);
 684    memcpy(cmd, str, cmdsize);
 685    _bangexp(&cmd, &cmdsize);
 686    if ((sh = ok_vlook(SHELL)) == NULL)
 687       sh = XSHELL;
 688
 689    sigint = safe_signal(SIGINT, SIG_IGN);
 690    sigemptyset(&mask);
 691    run_command(sh, &mask, -1, -1, "-c", cmd, NULL);
 692    safe_signal(SIGINT, sigint);
 693    printf("!\n");
 694
 695    free(cmd);
 696    NYD_LEAVE;
 697    return 0;
 698 }
 699
 700 FL int
 701 c_dosh(void *v)
 702 {
 703    sighandler_type sigint;
 704    char const *sh;
 705    NYD_ENTER;
 706    UNUSED(v);
 707
 708    if ((sh = ok_vlook(SHELL)) == NULL)
 709       sh = XSHELL;
 710
 711    sigint = safe_signal(SIGINT, SIG_IGN);
 712    run_command(sh, 0, -1, -1, NULL, NULL, NULL);
 713    safe_signal(SIGINT, sigint);
 714    putchar('\n');
 715    NYD_LEAVE;
 716    return 0;
 717 }
 718
 719 FL int
 720 c_help(void *v)
 721 {
 722    int ret = 0;
 723    char *arg;
 724    NYD_ENTER;
 725
 726    arg = *(char**)v;
 727
 728    if (arg != NULL) {
 729 #ifdef HAVE_DOCSTRINGS
 730       ret = !print_comm_docstr(arg);
 731       if (ret)
 732          n_err(_("Unknown command: `%s'\n"), arg);
 733 #else
 734       ret = c_cmdnotsupp(NULL);
 735 #endif
 736       goto jleave;
 737    }
 738
 739    /* Very ugly, but take care for compiler supported string lengths :( */
 740    fputs(progname, stdout);
 741    fputs(_(
 742       " commands -- \"<msglist>\" denotes message specifications,\n"
 743       "e.g., \"1-5\", \":n\" or \".\", separated by spaces:\n"), stdout);
 744    fputs(_(
 745 "\n"
 746 "type <msglist>         type (alias: `print') messages (honour `retain' etc.)\n"
 747 "Type <msglist>         like `type' but always show all headers\n"
 748 "next                   goto and type next message\n"
 749 "from <msglist>         print header summary for the given list (\"search\")\n"
 750 "headers                header summary for messages surrounding \"dot\"\n"
 751 "delete <msglist>       delete messages (can be `undelete'd)\n"),
 752       stdout);
 753
 754    fputs(_(
 755 "\n"
 756 "save <msglist> folder  append messages to folder and mark as saved\n"
 757 "copy <msglist> folder  like `save', but don't mark them (`move' moves)\n"
 758 "write <msglist> file   write message contents to file (prompts for parts)\n"
 759 "Reply <msglist>        reply to message senders only\n"
 760 "reply <msglist>        like `Reply', but address all recipients\n"
 761 "Lreply <msglist>       forced mailing-list `reply' (see `mlist')\n"),
 762       stdout);
 763
 764    fputs(_(
 765 "\n"
 766 "mail <recipients>      compose a mail for the given recipients\n"
 767 "file folder            change to another mailbox\n"
 768 "File folder            like `file', but open readonly\n"
 769 "quit                   quit and apply changes to the current mailbox\n"
 770 "xit or exit            like `quit', but discard changes\n"
 771 "!shell command         shell escape\n"
 772 "list                   list names of all available commands\n"),
 773       stdout);
 774
 775 jleave:
 776    NYD_LEAVE;
 777    return ret;
 778 }
 779
 780 FL int
 781 c_cwd(void *v)
 782 {
 783    char buf[PATH_MAX]; /* TODO getcwd(3) may return a larger value */
 784    NYD_ENTER;
 785
 786    if (getcwd(buf, sizeof buf) != NULL) {
 787       puts(buf);
 788       v = (void*)0x1;
 789    } else {
 790       n_perr(_("getcwd"), 0);
 791       v = NULL;
 792    }
 793    NYD_LEAVE;
 794    return (v == NULL);
 795 }
 796
 797 FL int
 798 c_chdir(void *v)
 799 {
 800    char **arglist = v;
 801    char const *cp;
 802    NYD_ENTER;
 803
 804    if (*arglist == NULL)
 805       cp = homedir;
 806    else if ((cp = file_expand(*arglist)) == NULL)
 807       goto jleave;
 808    if (chdir(cp) == -1) {
 809       n_perr(cp, 0);
 810       cp = NULL;
 811    }
 812 jleave:
 813    NYD_LEAVE;
 814    return (cp == NULL);
 815 }
 816
 817 FL int
 818 c_reply(void *v)
 819 {
 820    int rv;
 821    NYD_ENTER;
 822
 823    rv = (*_reply_or_Reply('r'))(v, FAL0);
 824    NYD_LEAVE;
 825    return rv;
 826 }
 827
 828 FL int
 829 c_replyall(void *v)
 830 {
 831    int rv;
 832    NYD_ENTER;
 833
 834    rv = _reply(v, FAL0);
 835    NYD_LEAVE;
 836    return rv;
 837 }
 838
 839 FL int
 840 c_replysender(void *v)
 841 {
 842    int rv;
 843    NYD_ENTER;
 844
 845    rv = _Reply(v, FAL0);
 846    NYD_LEAVE;
 847    return rv;
 848 }
 849
 850 FL int
 851 c_Reply(void *v)
 852 {
 853    int rv;
 854    NYD_ENTER;
 855
 856    rv = (*_reply_or_Reply('R'))(v, FAL0);
 857    NYD_LEAVE;
 858    return rv;
 859 }
 860
 861 FL int
 862 c_Lreply(void *v)
 863 {
 864    int rv;
 865    NYD_ENTER;
 866
 867    rv = _list_reply(v, HF_LIST_REPLY);
 868    NYD_LEAVE;
 869    return rv;
 870 }
 871
 872 FL int
 873 c_followup(void *v)
 874 {
 875    int rv;
 876    NYD_ENTER;
 877
 878    rv = (*_reply_or_Reply('r'))(v, TRU1);
 879    NYD_LEAVE;
 880    return rv;
 881 }
 882
 883 FL int
 884 c_followupall(void *v)
 885 {
 886    int rv;
 887    NYD_ENTER;
 888
 889    rv = _reply(v, TRU1);
 890    NYD_LEAVE;
 891    return rv;
 892 }
 893
 894 FL int
 895 c_followupsender(void *v)
 896 {
 897    int rv;
 898    NYD_ENTER;
 899
 900    rv = _Reply(v, TRU1);
 901    NYD_LEAVE;
 902    return rv;
 903 }
 904
 905 FL int
 906 c_Followup(void *v)
 907 {
 908    int rv;
 909    NYD_ENTER;
 910
 911    rv = (*_reply_or_Reply('R'))(v, TRU1);
 912    NYD_LEAVE;
 913    return rv;
 914 }
 915
 916 FL int
 917 c_forward(void *v)
 918 {
 919    int rv;
 920    NYD_ENTER;
 921
 922    rv = _fwd(v, 0);
 923    NYD_LEAVE;
 924    return rv;
 925 }
 926
 927 FL int
 928 c_Forward(void *v)
 929 {
 930    int rv;
 931    NYD_ENTER;
 932
 933    rv = _fwd(v, 1);
 934    NYD_LEAVE;
 935    return rv;
 936 }
 937
 938 FL int
 939 c_resend(void *v)
 940 {
 941    int rv;
 942    NYD_ENTER;
 943
 944    rv = _resend1(v, TRU1);
 945    NYD_LEAVE;
 946    return rv;
 947 }
 948
 949 FL int
 950 c_Resend(void *v)
 951 {
 952    int rv;
 953    NYD_ENTER;
 954
 955    rv = _resend1(v, FAL0);
 956    NYD_LEAVE;
 957    return rv;
 958 }
 959
 960 FL int
 961 c_preserve(void *v)
 962 {
 963    int *msgvec = v, *ip, mesg, rv = 1;
 964    struct message *mp;
 965    NYD_ENTER;
 966
 967    if (pstate & PS_EDIT) {
 968       printf(_("Cannot \"preserve\" in a system mailbox\n"));
 969       goto jleave;
 970    }
 971
 972    for (ip = msgvec; *ip != 0; ++ip) {
 973       mesg = *ip;
 974       mp = message + mesg - 1;
 975       mp->m_flag |= MPRESERVE;
 976       mp->m_flag &= ~MBOX;
 977       setdot(mp);
 978       pstate |= PS_DID_PRINT_DOT;
 979    }
 980    rv = 0;
 981 jleave:
 982    NYD_LEAVE;
 983    return rv;
 984 }
 985
 986 FL int
 987 c_unread(void *v)
 988 {
 989    int *msgvec = v, *ip;
 990    NYD_ENTER;
 991
 992    for (ip = msgvec; *ip != 0; ++ip) {
 993       setdot(message + *ip - 1);
 994       dot->m_flag &= ~(MREAD | MTOUCH);
 995       dot->m_flag |= MSTATUS;
 996 #ifdef HAVE_IMAP
 997       if (mb.mb_type == MB_IMAP || mb.mb_type == MB_CACHE)
 998          imap_unread(message + *ip - 1, *ip); /* TODO return? */
 999 #endif
1000       pstate |= PS_DID_PRINT_DOT;
1001    }
1002    NYD_LEAVE;
1003    return 0;
1004 }
1005
1006 FL int
1007 c_seen(void *v)
1008 {
1009    int *msgvec = v, *ip;
1010    NYD_ENTER;
1011
1012    for (ip = msgvec; *ip != 0; ++ip) {
1013       struct message *mp = message + *ip - 1;
1014       setdot(mp);
1015       touch(mp);
1016    }
1017    NYD_LEAVE;
1018    return 0;
1019 }
1020
1021 FL int
1022 c_messize(void *v)
1023 {
1024    int *msgvec = v, *ip, mesg;
1025    struct message *mp;
1026    NYD_ENTER;
1027
1028    for (ip = msgvec; *ip != 0; ++ip) {
1029       mesg = *ip;
1030       mp = message + mesg - 1;
1031       printf("%d: ", mesg);
1032       if (mp->m_xlines > 0)
1033          printf("%ld", mp->m_xlines);
1034       else
1035          putchar(' ');
1036       printf("/%lu\n", (ul_i)mp->m_xsize);
1037    }
1038    NYD_LEAVE;
1039    return 0;
1040 }
1041
1042 FL int
1043 c_file(void *v)
1044 {
1045    int rv;
1046    NYD_ENTER;
1047
1048    rv = _c_file(v, FEDIT_NONE);
1049    NYD_LEAVE;
1050    return rv;
1051 }
1052
1053 FL int
1054 c_File(void *v)
1055 {
1056    int rv;
1057    NYD_ENTER;
1058
1059    rv = _c_file(v, FEDIT_RDONLY);
1060    NYD_LEAVE;
1061    return rv;
1062 }
1063
1064 FL int
1065 c_echo(void *v)
1066 {
1067    char const **argv = v, **ap, *cp;
1068    int c;
1069    NYD_ENTER;
1070
1071    for (ap = argv; *ap != NULL; ++ap) {
1072       cp = *ap;
1073       if ((cp = fexpand(cp, FEXP_NSHORTCUT)) != NULL) {
1074          if (ap != argv)
1075             putchar(' ');
1076          c = 0;
1077          while (*cp != '\0' && (c = expand_shell_escape(&cp, FAL0)) > 0)
1078             putchar(c);
1079          /* \c ends overall processing */
1080          if (c < 0)
1081             goto jleave;
1082       }
1083    }
1084    putchar('\n');
1085 jleave:
1086    NYD_LEAVE;
1087    return 0;
1088 }
1089
1090 FL int
1091 c_newmail(void *v)
1092 {
1093    int val = 1, mdot;
1094    NYD_ENTER;
1095    UNUSED(v);
1096
1097    if (
1098 #ifdef HAVE_IMAP
1099          (mb.mb_type != MB_IMAP || imap_newmail(1)) &&
1100 #endif
1101          (val = setfile(mailname,
1102             FEDIT_NEWMAIL | ((mb.mb_perm & MB_DELE) ? 0 : FEDIT_RDONLY))
1103          ) == 0) {
1104       mdot = getmdot(1);
1105       setdot(message + mdot - 1);
1106    }
1107    NYD_LEAVE;
1108    return val;
1109 }
1110
1111 FL int
1112 c_flag(void *v)
1113 {
1114    struct message *m;
1115    int *msgvec = v, *ip;
1116    NYD_ENTER;
1117
1118    for (ip = msgvec; *ip != 0; ++ip) {
1119       m = message + *ip - 1;
1120       setdot(m);
1121       if (!(m->m_flag & (MFLAG | MFLAGGED)))
1122          m->m_flag |= MFLAG | MFLAGGED;
1123    }
1124    NYD_LEAVE;
1125    return 0;
1126 }
1127
1128 FL int
1129 c_unflag(void *v)
1130 {
1131    struct message *m;
1132    int *msgvec = v, *ip;
1133    NYD_ENTER;
1134
1135    for (ip = msgvec; *ip != 0; ++ip) {
1136       m = message + *ip - 1;
1137       setdot(m);
1138       if (m->m_flag & (MFLAG | MFLAGGED)) {
1139          m->m_flag &= ~(MFLAG | MFLAGGED);
1140          m->m_flag |= MUNFLAG;
1141       }
1142    }
1143    NYD_LEAVE;
1144    return 0;
1145 }
1146
1147 FL int
1148 c_answered(void *v)
1149 {
1150    struct message *m;
1151    int *msgvec = v, *ip;
1152    NYD_ENTER;
1153
1154    for (ip = msgvec; *ip != 0; ++ip) {
1155       m = message + *ip - 1;
1156       setdot(m);
1157       if (!(m->m_flag & (MANSWER | MANSWERED)))
1158          m->m_flag |= MANSWER | MANSWERED;
1159    }
1160    NYD_LEAVE;
1161    return 0;
1162 }
1163
1164 FL int
1165 c_unanswered(void *v)
1166 {
1167    struct message *m;
1168    int *msgvec = v, *ip;
1169    NYD_ENTER;
1170
1171    for (ip = msgvec; *ip != 0; ++ip) {
1172       m = message + *ip - 1;
1173       setdot(m);
1174       if (m->m_flag & (MANSWER | MANSWERED)) {
1175          m->m_flag &= ~(MANSWER | MANSWERED);
1176          m->m_flag |= MUNANSWER;
1177       }
1178    }
1179    NYD_LEAVE;
1180    return 0;
1181 }
1182
1183 FL int
1184 c_draft(void *v)
1185 {
1186    struct message *m;
1187    int *msgvec = v, *ip;
1188    NYD_ENTER;
1189
1190    for (ip = msgvec; *ip != 0; ++ip) {
1191       m = message + *ip - 1;
1192       setdot(m);
1193       if (!(m->m_flag & (MDRAFT | MDRAFTED)))
1194          m->m_flag |= MDRAFT | MDRAFTED;
1195    }
1196    NYD_LEAVE;
1197    return 0;
1198 }
1199
1200 FL int
1201 c_undraft(void *v)
1202 {
1203    struct message *m;
1204    int *msgvec = v, *ip;
1205    NYD_ENTER;
1206
1207    for (ip = msgvec; *ip != 0; ++ip) {
1208       m = message + *ip - 1;
1209       setdot(m);
1210       if (m->m_flag & (MDRAFT | MDRAFTED)) {
1211          m->m_flag &= ~(MDRAFT | MDRAFTED);
1212          m->m_flag |= MUNDRAFT;
1213       }
1214    }
1215    NYD_LEAVE;
1216    return 0;
1217 }
1218
1219 FL int
1220 c_noop(void *v)
1221 {
1222    int rv = 0;
1223    NYD_ENTER;
1224    UNUSED(v);
1225
1226    switch (mb.mb_type) {
1227    case MB_IMAP:
1228 #ifdef HAVE_IMAP
1229       imap_noop();
1230 #else
1231       rv = c_cmdnotsupp(NULL);
1232 #endif
1233       break;
1234    case MB_POP3:
1235 #ifdef HAVE_POP3
1236       pop3_noop();
1237 #else
1238       rv = c_cmdnotsupp(NULL);
1239 #endif
1240       break;
1241    default:
1242       break;
1243    }
1244    NYD_LEAVE;
1245    return rv;
1246 }
1247
1248 FL int
1249 c_remove(void *v)
1250 {
1251    char const *fmt;
1252    size_t fmt_len;
1253    char **args = v, *name;
1254    int ec = 0;
1255    NYD_ENTER;
1256
1257    if (*args == NULL) {
1258       n_err(_("Synopsis: remove: <mailbox>...\n"));
1259       ec = 1;
1260       goto jleave;
1261    }
1262
1263    fmt = _("Remove \"%s\" (y/n) ? ");
1264    fmt_len = strlen(fmt);
1265    do {
1266       if ((name = expand(*args)) == NULL)
1267          continue;
1268
1269       if (!strcmp(name, mailname)) {
1270          n_err(_("Cannot remove current mailbox \"%s\"\n"), name);
1271          ec |= 1;
1272          continue;
1273       }
1274       {
1275          size_t vl = strlen(name) + fmt_len +1;
1276          char *vb = ac_alloc(vl);
1277          bool_t asw;
1278          snprintf(vb, vl, fmt, name);
1279          asw = getapproval(vb, TRU1);
1280          ac_free(vb);
1281          if (!asw)
1282             continue;
1283       }
1284
1285       switch (which_protocol(name)) {
1286       case PROTO_FILE:
1287          if (unlink(name) == -1) { /* TODO do not handle .gz .bz2 .xz.. */
1288             n_perr(name, 0);
1289             ec |= 1;
1290          }
1291          break;
1292       case PROTO_POP3:
1293          n_err(_("Cannot remove POP3 mailbox \"%s\"\n"),name);
1294          ec |= 1;
1295          break;
1296       case PROTO_IMAP:
1297 #ifdef HAVE_IMAP
1298          if (imap_remove(name) != OKAY)
1299 #endif
1300             ec |= 1;
1301          break;
1302       case PROTO_MAILDIR:
1303          if (maildir_remove(name) != OKAY)
1304             ec |= 1;
1305          break;
1306       case PROTO_UNKNOWN:
1307          n_err(_("Unknown protocol in \"%s\"; not removed\n"), name);
1308          ec |= 1;
1309          break;
1310       }
1311    } while (*++args != NULL);
1312 jleave:
1313    NYD_LEAVE;
1314    return ec;
1315 }
1316
1317 FL int
1318 c_rename(void *v)
1319 {
1320    char **args = v, *old, *new;
1321    enum protocol oldp, newp;
1322    int ec;
1323    NYD_ENTER;
1324
1325    ec = 1;
1326
1327    if (args[0] == NULL || args[1] == NULL || args[2] != NULL) {
1328       n_err(_("Synopsis: rename: <old> <new>\n"));
1329       goto jleave;
1330    }
1331
1332    if ((old = expand(args[0])) == NULL)
1333       goto jleave;
1334    oldp = which_protocol(old);
1335    if ((new = expand(args[1])) == NULL)
1336       goto jleave;
1337    newp = which_protocol(new);
1338
1339    if (!strcmp(old, mailname) || !strcmp(new, mailname)) {
1340       n_err(_("Cannot rename current mailbox \"%s\"\n"), old);
1341       goto jleave;
1342    }
1343    if ((oldp == PROTO_IMAP || newp == PROTO_IMAP) && oldp != newp) {
1344       fprintf(stderr, _("Can only rename folders of same type.\n"));
1345       goto jleave;
1346    }
1347
1348    ec = 0;
1349
1350    if (newp == PROTO_POP3)
1351       goto jnopop3;
1352    switch (oldp) {
1353    case PROTO_FILE:
1354       if (link(old, new) == -1) {
1355          switch (errno) {
1356          case EACCES:
1357          case EEXIST:
1358          case ENAMETOOLONG:
1359          case ENOENT:
1360          case ENOSPC:
1361          case EXDEV:
1362             n_perr(new, 0);
1363             break;
1364          default:
1365             n_perr(old, 0);
1366             break;
1367          }
1368          ec |= 1;
1369       } else if (unlink(old) == -1) {
1370          n_perr(old, 0);
1371          ec |= 1;
1372       }
1373       break;
1374    case PROTO_MAILDIR:
1375       if (rename(old, new) == -1) {
1376          n_perr(old, 0);
1377          ec |= 1;
1378       }
1379       break;
1380    case PROTO_POP3:
1381 jnopop3:
1382       n_err(_("Cannot rename POP3 mailboxes\n"));
1383       ec |= 1;
1384       break;
1385 #ifdef HAVE_IMAP
1386    case PROTO_IMAP:
1387       if (imap_rename(old, new) != OKAY)
1388          ec |= 1;
1389       break;
1390 #endif
1391    case PROTO_UNKNOWN:
1392    default:
1393       n_err(_("Unknown protocol in \"%s\" and \"%s\"; not renamed\n"),
1394          old, new);
1395       ec |= 1;
1396       break;
1397    }
1398 jleave:
1399    NYD_LEAVE;
1400    return ec;
1401 }
1402
1403 FL int
1404 c_urlencode(void *v) /* XXX IDNA?? */
1405 {
1406    char **ap;
1407    NYD_ENTER;
1408
1409    OBSOLETE("`urlencode': please use `urlcodec enc[ode]' instead");
1410
1411    for (ap = v; *ap != NULL; ++ap) {
1412       char *in = *ap, *out = urlxenc(in, FAL0);
1413
1414       printf(" in: <%s> (%" PRIuZ " bytes)\nout: <%s> (%" PRIuZ " bytes)\n",
1415          in, strlen(in), out, strlen(out));
1416    }
1417    NYD_LEAVE;
1418    return 0;
1419 }
1420
1421 FL int
1422 c_urldecode(void *v) /* XXX IDNA?? */
1423 {
1424    char **ap;
1425    NYD_ENTER;
1426
1427    OBSOLETE("`urldecode': please use `urlcodec dec[ode]' instead");
1428
1429    for (ap = v; *ap != NULL; ++ap) {
1430       char *in = *ap, *out = urlxdec(in);
1431
1432       printf(" in: <%s> (%" PRIuZ " bytes)\nout: <%s> (%" PRIuZ " bytes)\n",
1433          in, strlen(in), out, strlen(out));
1434    }
1435    NYD_LEAVE;
1436    return 0;
1437 }
1438
1439 /* s-it-mode */