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             sz = strlen(_bang_buf);
 125             bangbuf = srealloc(bangbuf, bangbufsize += sz);
 126             ++changed;
 127             memcpy(bangbuf + j, _bang_buf, sz + 1);
 128             j += sz;
 129             i++;
 130             continue;
 131          }
 132       }
 133       if ((*str)[i] == '\\' && (*str)[i + 1] == '!') {
 134          bangbuf[j++] = '!';
 135          i += 2;
 136          ++changed;
 137       }
 138       bangbuf[j++] = (*str)[i++];
 139    }
 140    bangbuf[j] = '\0';
 141    if (changed) {
 142       printf("!%s\n", bangbuf);
 143       fflush(stdout);
 144    }
 145    sz = j + 1;
 146    if (sz > *size)
 147       *str = srealloc(*str, *size = sz);
 148    memcpy(*str, bangbuf, sz);
 149    if (sz > _bang_size)
 150       _bang_buf = srealloc(_bang_buf, _bang_size = sz);
 151    memcpy(_bang_buf, bangbuf, sz);
 152    free(bangbuf);
 153    NYD_LEAVE;
 154 }
 155
 156 static void
 157 make_ref_and_cs(struct message *mp, struct header *head) /* TODO rewrite FAST */
 158 {
 159    char *oldref, *oldmsgid, *newref, *cp;
 160    size_t oldreflen = 0, oldmsgidlen = 0, reflen;
 161    unsigned i;
 162    struct name *n;
 163    NYD_ENTER;
 164
 165    oldref = hfield1("references", mp);
 166    oldmsgid = hfield1("message-id", mp);
 167    if (oldmsgid == NULL || *oldmsgid == '\0') {
 168       head->h_ref = NULL;
 169       goto jleave;
 170    }
 171
 172    reflen = 1;
 173    if (oldref) {
 174       oldreflen = strlen(oldref);
 175       reflen += oldreflen + 2;
 176    }
 177    if (oldmsgid) {
 178       oldmsgidlen = strlen(oldmsgid);
 179       reflen += oldmsgidlen;
 180    }
 181
 182    newref = smalloc(reflen);
 183    if (oldref != NULL) {
 184       memcpy(newref, oldref, oldreflen +1);
 185       if (oldmsgid != NULL) {
 186          newref[oldreflen++] = ',';
 187          newref[oldreflen++] = ' ';
 188          memcpy(newref + oldreflen, oldmsgid, oldmsgidlen +1);
 189       }
 190    } else if (oldmsgid)
 191       memcpy(newref, oldmsgid, oldmsgidlen +1);
 192    n = extract(newref, GREF);
 193    free(newref);
 194
 195    /* Limit number of references TODO better on parser side */
 196    while (n->n_flink != NULL)
 197       n = n->n_flink;
 198    for (i = 1; i <= REFERENCES_MAX; ++i) {
 199       if (n->n_blink != NULL)
 200          n = n->n_blink;
 201       else
 202          break;
 203    }
 204    n->n_blink = NULL;
 205    head->h_ref = n;
 206    if (ok_blook(reply_in_same_charset) &&
 207          (cp = hfield1("content-type", mp)) != NULL)
 208       head->h_charset = mime_param_get("charset", cp);
 209 jleave:
 210    NYD_LEAVE;
 211 }
 212
 213 static int
 214 _list_reply(int *msgvec, enum header_flags hf)
 215 {
 216    struct header head;
 217    struct message *mp;
 218    char const *reply_to, *rcv, *cp;
 219    enum gfield gf;
 220    struct name *rt, *mft, *np;
 221    int *save_msgvec;
 222    NYD_ENTER;
 223
 224    /* TODO Since we may recur and do stuff with message lists we need to save
 225     * TODO away the argument vector as long as that isn't done by machinery */
 226    {
 227       size_t i;
 228       for (i = 0; msgvec[i] != 0; ++i)
 229          ;
 230       ++i;
 231       save_msgvec = ac_alloc(sizeof(*save_msgvec) * i);
 232       while (i-- > 0)
 233          save_msgvec[i] = msgvec[i];
 234       msgvec = save_msgvec;
 235    }
 236
 237 jnext_msg:
 238    mp = message + *msgvec - 1;
 239    touch(mp);
 240    setdot(mp);
 241
 242    memset(&head, 0, sizeof head);
 243    head.h_flags = hf;
 244
 245    head.h_subject = _reedit(hfield1("subject", mp));
 246    gf = ok_blook(fullnames) ? GFULL : GSKIN;
 247    rt = mft = NULL;
 248
 249    rcv = NULL;
 250    if ((reply_to = hfield1("reply-to", mp)) != NULL &&
 251          (cp = ok_vlook(reply_to_honour)) != NULL &&
 252          (rt = checkaddrs(lextract(reply_to, GTO | gf), EACM_STRICT, NULL)
 253          ) != NULL) {
 254       char const *tr = _("Reply-To \"%s%s\"");
 255       size_t l = strlen(tr) + strlen(rt->n_name) + 3 +1;
 256       char *sp = salloc(l);
 257
 258       snprintf(sp, l, tr, rt->n_name, (rt->n_flink != NULL ? "..." : ""));
 259       if (quadify(cp, UIZ_MAX, sp, TRU1) > FAL0)
 260          rcv = reply_to;
 261    }
 262
 263    if (rcv == NULL && (rcv = hfield1("from", mp)) == NULL)
 264       rcv = nameof(mp, 1);
 265
 266    /* Cc: */
 267    np = NULL;
 268    if (ok_blook(recipients_in_cc) && (cp = hfield1("to", mp)) != NULL)
 269       np = lextract(cp, GCC | gf);
 270    if ((cp = hfield1("cc", mp)) != NULL)
 271       np = cat(np, lextract(cp, GCC | gf));
 272    if (np != NULL)
 273       head.h_cc = delete_alternates(np);
 274
 275    /* To: */
 276    np = NULL;
 277    if (rcv != NULL)
 278       np = (rcv == reply_to) ? namelist_dup(rt, GTO | gf)
 279             : lextract(rcv, GTO | gf);
 280    if (!ok_blook(recipients_in_cc) && (cp = hfield1("to", mp)) != NULL)
 281       np = cat(np, lextract(cp, GTO | gf));
 282    /* Delete my name from reply list, and with it, all my alternate names */
 283    np = delete_alternates(np);
 284    if (count(np) == 0)
 285       np = lextract(rcv, GTO | gf);
 286    head.h_to = np;
 287
 288    /* The user may have send this to himself, don't ignore that */
 289    namelist_vaporise_head(&head, EACM_NORMAL, FAL0, NULL);
 290    if (head.h_to == NULL)
 291       head.h_to = np;
 292
 293    /* Mail-Followup-To: */
 294    mft = NULL;
 295    if (ok_vlook(followup_to_honour) != NULL &&
 296          (cp = hfield1("mail-followup-to", mp)) != NULL &&
 297          (mft = np = checkaddrs(lextract(cp, GTO | gf), EACM_STRICT, NULL)
 298          ) != NULL) {
 299       char const *tr = _("Followup-To \"%s%s\"");
 300       size_t l = strlen(tr) + strlen(np->n_name) + 3 +1;
 301       char *sp = salloc(l);
 302
 303       snprintf(sp, l, tr, np->n_name, (np->n_flink != NULL ? "..." : ""));
 304       if (quadify(ok_vlook(followup_to_honour), UIZ_MAX, sp, TRU1) > FAL0) {
 305          head.h_cc = NULL;
 306          head.h_to = np;
 307          head.h_mft =
 308          mft = namelist_vaporise_head(&head, EACM_STRICT, FAL0, NULL);
 309       } else
 310          mft = NULL;
 311    }
 312
 313    /* Special massage for list (follow-up) messages */
 314    if (mft != NULL || (hf & HF_LIST_REPLY) || ok_blook(followup_to)) {
 315       /* Learn about a possibly sending mailing list; use do for break; */
 316       if ((cp = hfield1("list-post", mp)) != NULL) do {
 317          struct name *x = lextract(cp, GEXTRA | GSKIN);
 318          if (x == NULL || x->n_flink != NULL ||
 319                !is_prefix("mailto:", x->n_name) ||
 320                /* XXX the mailto: prefix causes failure (":" invalid character)
 321                 * XXX which is why need to recreate a struct name with an
 322                 * XXX updated name; this is terribly wasteful and can't we find
 323                 * XXX a way to mitigate that?? */
 324                is_addr_invalid(x = nalloc(x->n_name + sizeof("mailto:") -1,
 325                   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)); /* (Prevent implementation error) */
 660    if (pstate & PS_SETFILE_OPENED)
 661       check_folder_hook(FAL0);
 662
 663    if (i > 0) {
 664       i = 1;
 665       goto jleave;
 666    }
 667    if (pstate & PS_SETFILE_OPENED)
 668       announce(ok_blook(bsdcompat) || ok_blook(bsdannounce));
 669    i = 0;
 670 jleave:
 671    NYD2_LEAVE;
 672    return i;
 673 }
 674
 675 FL int
 676 c_shell(void *v)
 677 {
 678    char const *sh = NULL;
 679    char *str = v, *cmd;
 680    size_t cmdsize;
 681    sigset_t mask;
 682    sighandler_type sigint;
 683    NYD_ENTER;
 684
 685    cmd = smalloc(cmdsize = strlen(str) +1);
 686    memcpy(cmd, str, cmdsize);
 687    _bangexp(&cmd, &cmdsize);
 688    if ((sh = ok_vlook(SHELL)) == NULL)
 689       sh = XSHELL;
 690
 691    sigint = safe_signal(SIGINT, SIG_IGN);
 692    sigemptyset(&mask);
 693    run_command(sh, &mask, COMMAND_FD_PASS, COMMAND_FD_PASS, "-c", cmd, NULL,
 694       NULL);
 695    safe_signal(SIGINT, sigint);
 696    printf("!\n");
 697
 698    free(cmd);
 699    NYD_LEAVE;
 700    return 0;
 701 }
 702
 703 FL int
 704 c_dosh(void *v)
 705 {
 706    sighandler_type sigint;
 707    char const *sh;
 708    NYD_ENTER;
 709    UNUSED(v);
 710
 711    if ((sh = ok_vlook(SHELL)) == NULL)
 712       sh = XSHELL;
 713
 714    sigint = safe_signal(SIGINT, SIG_IGN);
 715    run_command(sh, 0, COMMAND_FD_PASS, COMMAND_FD_PASS, NULL, NULL, NULL, NULL);
 716    safe_signal(SIGINT, sigint);
 717    putchar('\n');
 718    NYD_LEAVE;
 719    return 0;
 720 }
 721
 722 FL int
 723 c_help(void *v)
 724 {
 725    int ret = 0;
 726    char *arg;
 727    NYD_ENTER;
 728
 729    arg = *(char**)v;
 730
 731    if (arg != NULL) {
 732 #ifdef HAVE_DOCSTRINGS
 733       ret = !print_comm_docstr(arg);
 734       if (ret)
 735          n_err(_("Unknown command: `%s'\n"), arg);
 736 #else
 737       ret = c_cmdnotsupp(NULL);
 738 #endif
 739       goto jleave;
 740    }
 741
 742    /* Very ugly, but take care for compiler supported string lengths :( */
 743    fputs(progname, stdout);
 744    fputs(_(
 745       " commands -- \"<msglist>\" denotes message specifications,\n"
 746       "e.g., \"1-5\", \":n\" or \".\", separated by spaces:\n"), stdout);
 747    fputs(_(
 748 "\n"
 749 "type <msglist>         type (alias: `print') messages (honour `retain' etc.)\n"
 750 "Type <msglist>         like `type' but always show all headers\n"
 751 "next                   goto and type next message\n"
 752 "from <msglist>         print header summary for the given list (\"search\")\n"
 753 "headers                header summary for messages surrounding \"dot\"\n"
 754 "delete <msglist>       delete messages (can be `undelete'd)\n"),
 755       stdout);
 756
 757    fputs(_(
 758 "\n"
 759 "save <msglist> folder  append messages to folder and mark as saved\n"
 760 "copy <msglist> folder  like `save', but don't mark them (`move' moves)\n"
 761 "write <msglist> file   write message contents to file (prompts for parts)\n"
 762 "Reply <msglist>        reply to message senders only\n"
 763 "reply <msglist>        like `Reply', but address all recipients\n"
 764 "Lreply <msglist>       forced mailing-list `reply' (see `mlist')\n"),
 765       stdout);
 766
 767    fputs(_(
 768 "\n"
 769 "mail <recipients>      compose a mail for the given recipients\n"
 770 "file folder            change to another mailbox\n"
 771 "File folder            like `file', but open readonly\n"
 772 "quit                   quit and apply changes to the current mailbox\n"
 773 "xit or exit            like `quit', but discard changes\n"
 774 "!shell command         shell escape\n"
 775 "list                   list names of all available commands\n"),
 776       stdout);
 777
 778 jleave:
 779    NYD_LEAVE;
 780    return ret;
 781 }
 782
 783 FL int
 784 c_cwd(void *v)
 785 {
 786    char buf[PATH_MAX]; /* TODO getcwd(3) may return a larger value */
 787    NYD_ENTER;
 788
 789    if (getcwd(buf, sizeof buf) != NULL) {
 790       puts(buf);
 791       v = (void*)0x1;
 792    } else {
 793       n_perr(_("getcwd"), 0);
 794       v = NULL;
 795    }
 796    NYD_LEAVE;
 797    return (v == NULL);
 798 }
 799
 800 FL int
 801 c_chdir(void *v)
 802 {
 803    char **arglist = v;
 804    char const *cp;
 805    NYD_ENTER;
 806
 807    if (*arglist == NULL)
 808       cp = homedir;
 809    else if ((cp = file_expand(*arglist)) == NULL)
 810       goto jleave;
 811    if (chdir(cp) == -1) {
 812       n_perr(cp, 0);
 813       cp = NULL;
 814    }
 815 jleave:
 816    NYD_LEAVE;
 817    return (cp == NULL);
 818 }
 819
 820 FL int
 821 c_reply(void *v)
 822 {
 823    int rv;
 824    NYD_ENTER;
 825
 826    rv = (*_reply_or_Reply('r'))(v, FAL0);
 827    NYD_LEAVE;
 828    return rv;
 829 }
 830
 831 FL int
 832 c_replyall(void *v)
 833 {
 834    int rv;
 835    NYD_ENTER;
 836
 837    rv = _reply(v, FAL0);
 838    NYD_LEAVE;
 839    return rv;
 840 }
 841
 842 FL int
 843 c_replysender(void *v)
 844 {
 845    int rv;
 846    NYD_ENTER;
 847
 848    rv = _Reply(v, FAL0);
 849    NYD_LEAVE;
 850    return rv;
 851 }
 852
 853 FL int
 854 c_Reply(void *v)
 855 {
 856    int rv;
 857    NYD_ENTER;
 858
 859    rv = (*_reply_or_Reply('R'))(v, FAL0);
 860    NYD_LEAVE;
 861    return rv;
 862 }
 863
 864 FL int
 865 c_Lreply(void *v)
 866 {
 867    int rv;
 868    NYD_ENTER;
 869
 870    rv = _list_reply(v, HF_LIST_REPLY);
 871    NYD_LEAVE;
 872    return rv;
 873 }
 874
 875 FL int
 876 c_followup(void *v)
 877 {
 878    int rv;
 879    NYD_ENTER;
 880
 881    rv = (*_reply_or_Reply('r'))(v, TRU1);
 882    NYD_LEAVE;
 883    return rv;
 884 }
 885
 886 FL int
 887 c_followupall(void *v)
 888 {
 889    int rv;
 890    NYD_ENTER;
 891
 892    rv = _reply(v, TRU1);
 893    NYD_LEAVE;
 894    return rv;
 895 }
 896
 897 FL int
 898 c_followupsender(void *v)
 899 {
 900    int rv;
 901    NYD_ENTER;
 902
 903    rv = _Reply(v, TRU1);
 904    NYD_LEAVE;
 905    return rv;
 906 }
 907
 908 FL int
 909 c_Followup(void *v)
 910 {
 911    int rv;
 912    NYD_ENTER;
 913
 914    rv = (*_reply_or_Reply('R'))(v, TRU1);
 915    NYD_LEAVE;
 916    return rv;
 917 }
 918
 919 FL int
 920 c_forward(void *v)
 921 {
 922    int rv;
 923    NYD_ENTER;
 924
 925    rv = _fwd(v, 0);
 926    NYD_LEAVE;
 927    return rv;
 928 }
 929
 930 FL int
 931 c_Forward(void *v)
 932 {
 933    int rv;
 934    NYD_ENTER;
 935
 936    rv = _fwd(v, 1);
 937    NYD_LEAVE;
 938    return rv;
 939 }
 940
 941 FL int
 942 c_resend(void *v)
 943 {
 944    int rv;
 945    NYD_ENTER;
 946
 947    rv = _resend1(v, TRU1);
 948    NYD_LEAVE;
 949    return rv;
 950 }
 951
 952 FL int
 953 c_Resend(void *v)
 954 {
 955    int rv;
 956    NYD_ENTER;
 957
 958    rv = _resend1(v, FAL0);
 959    NYD_LEAVE;
 960    return rv;
 961 }
 962
 963 FL int
 964 c_preserve(void *v)
 965 {
 966    int *msgvec = v, *ip, mesg, rv = 1;
 967    struct message *mp;
 968    NYD_ENTER;
 969
 970    if (pstate & PS_EDIT) {
 971       printf(_("Cannot \"preserve\" in a system mailbox\n"));
 972       goto jleave;
 973    }
 974
 975    for (ip = msgvec; *ip != 0; ++ip) {
 976       mesg = *ip;
 977       mp = message + mesg - 1;
 978       mp->m_flag |= MPRESERVE;
 979       mp->m_flag &= ~MBOX;
 980       setdot(mp);
 981       pstate |= PS_DID_PRINT_DOT;
 982    }
 983    rv = 0;
 984 jleave:
 985    NYD_LEAVE;
 986    return rv;
 987 }
 988
 989 FL int
 990 c_unread(void *v)
 991 {
 992    int *msgvec = v, *ip;
 993    NYD_ENTER;
 994
 995    for (ip = msgvec; *ip != 0; ++ip) {
 996       setdot(message + *ip - 1);
 997       dot->m_flag &= ~(MREAD | MTOUCH);
 998       dot->m_flag |= MSTATUS;
 999       pstate |= PS_DID_PRINT_DOT;
1000    }
1001    NYD_LEAVE;
1002    return 0;
1003 }
1004
1005 FL int
1006 c_seen(void *v)
1007 {
1008    int *msgvec = v, *ip;
1009    NYD_ENTER;
1010
1011    for (ip = msgvec; *ip != 0; ++ip) {
1012       struct message *mp = message + *ip - 1;
1013       setdot(mp);
1014       touch(mp);
1015    }
1016    NYD_LEAVE;
1017    return 0;
1018 }
1019
1020 FL int
1021 c_messize(void *v)
1022 {
1023    int *msgvec = v, *ip, mesg;
1024    struct message *mp;
1025    NYD_ENTER;
1026
1027    for (ip = msgvec; *ip != 0; ++ip) {
1028       mesg = *ip;
1029       mp = message + mesg - 1;
1030       printf("%d: ", mesg);
1031       if (mp->m_xlines > 0)
1032          printf("%ld", mp->m_xlines);
1033       else
1034          putchar(' ');
1035       printf("/%lu\n", (ul_i)mp->m_xsize);
1036    }
1037    NYD_LEAVE;
1038    return 0;
1039 }
1040
1041 FL int
1042 c_file(void *v)
1043 {
1044    int rv;
1045    NYD_ENTER;
1046
1047    rv = _c_file(v, FEDIT_NONE);
1048    NYD_LEAVE;
1049    return rv;
1050 }
1051
1052 FL int
1053 c_File(void *v)
1054 {
1055    int rv;
1056    NYD_ENTER;
1057
1058    rv = _c_file(v, FEDIT_RDONLY);
1059    NYD_LEAVE;
1060    return rv;
1061 }
1062
1063 FL int
1064 c_echo(void *v)
1065 {
1066    char const **argv = v, **ap, *cp;
1067    int c;
1068    NYD_ENTER;
1069
1070    for (ap = argv; *ap != NULL; ++ap) {
1071       cp = *ap;
1072       if ((cp = fexpand(cp, FEXP_NSHORTCUT)) != NULL) {
1073          if (ap != argv)
1074             putchar(' ');
1075          c = 0;
1076          while (*cp != '\0' && (c = n_shell_expand_escape(&cp, FAL0)) > 0)
1077             putchar(c);
1078          /* \c ends overall processing */
1079          if (c < 0)
1080             goto jleave;
1081       }
1082    }
1083    putchar('\n');
1084 jleave:
1085    NYD_LEAVE;
1086    return 0;
1087 }
1088
1089 FL int
1090 c_newmail(void *v)
1091 {
1092    int val = 1, mdot;
1093    NYD_ENTER;
1094    UNUSED(v);
1095
1096    if ((val = setfile(mailname,
1097             FEDIT_NEWMAIL | ((mb.mb_perm & MB_DELE) ? 0 : FEDIT_RDONLY))
1098          ) == 0) {
1099       mdot = getmdot(1);
1100       setdot(message + mdot - 1);
1101    }
1102    NYD_LEAVE;
1103    return val;
1104 }
1105
1106 FL int
1107 c_flag(void *v)
1108 {
1109    struct message *m;
1110    int *msgvec = v, *ip;
1111    NYD_ENTER;
1112
1113    for (ip = msgvec; *ip != 0; ++ip) {
1114       m = message + *ip - 1;
1115       setdot(m);
1116       if (!(m->m_flag & (MFLAG | MFLAGGED)))
1117          m->m_flag |= MFLAG | MFLAGGED;
1118    }
1119    NYD_LEAVE;
1120    return 0;
1121 }
1122
1123 FL int
1124 c_unflag(void *v)
1125 {
1126    struct message *m;
1127    int *msgvec = v, *ip;
1128    NYD_ENTER;
1129
1130    for (ip = msgvec; *ip != 0; ++ip) {
1131       m = message + *ip - 1;
1132       setdot(m);
1133       if (m->m_flag & (MFLAG | MFLAGGED)) {
1134          m->m_flag &= ~(MFLAG | MFLAGGED);
1135          m->m_flag |= MUNFLAG;
1136       }
1137    }
1138    NYD_LEAVE;
1139    return 0;
1140 }
1141
1142 FL int
1143 c_answered(void *v)
1144 {
1145    struct message *m;
1146    int *msgvec = v, *ip;
1147    NYD_ENTER;
1148
1149    for (ip = msgvec; *ip != 0; ++ip) {
1150       m = message + *ip - 1;
1151       setdot(m);
1152       if (!(m->m_flag & (MANSWER | MANSWERED)))
1153          m->m_flag |= MANSWER | MANSWERED;
1154    }
1155    NYD_LEAVE;
1156    return 0;
1157 }
1158
1159 FL int
1160 c_unanswered(void *v)
1161 {
1162    struct message *m;
1163    int *msgvec = v, *ip;
1164    NYD_ENTER;
1165
1166    for (ip = msgvec; *ip != 0; ++ip) {
1167       m = message + *ip - 1;
1168       setdot(m);
1169       if (m->m_flag & (MANSWER | MANSWERED)) {
1170          m->m_flag &= ~(MANSWER | MANSWERED);
1171          m->m_flag |= MUNANSWER;
1172       }
1173    }
1174    NYD_LEAVE;
1175    return 0;
1176 }
1177
1178 FL int
1179 c_draft(void *v)
1180 {
1181    struct message *m;
1182    int *msgvec = v, *ip;
1183    NYD_ENTER;
1184
1185    for (ip = msgvec; *ip != 0; ++ip) {
1186       m = message + *ip - 1;
1187       setdot(m);
1188       if (!(m->m_flag & (MDRAFT | MDRAFTED)))
1189          m->m_flag |= MDRAFT | MDRAFTED;
1190    }
1191    NYD_LEAVE;
1192    return 0;
1193 }
1194
1195 FL int
1196 c_undraft(void *v)
1197 {
1198    struct message *m;
1199    int *msgvec = v, *ip;
1200    NYD_ENTER;
1201
1202    for (ip = msgvec; *ip != 0; ++ip) {
1203       m = message + *ip - 1;
1204       setdot(m);
1205       if (m->m_flag & (MDRAFT | MDRAFTED)) {
1206          m->m_flag &= ~(MDRAFT | MDRAFTED);
1207          m->m_flag |= MUNDRAFT;
1208       }
1209    }
1210    NYD_LEAVE;
1211    return 0;
1212 }
1213
1214 FL int
1215 c_noop(void *v)
1216 {
1217    int rv = 0;
1218    NYD_ENTER;
1219    UNUSED(v);
1220
1221    switch (mb.mb_type) {
1222    case MB_POP3:
1223 #ifdef HAVE_POP3
1224       pop3_noop();
1225 #else
1226       rv = c_cmdnotsupp(NULL);
1227 #endif
1228       break;
1229    default:
1230       break;
1231    }
1232    NYD_LEAVE;
1233    return rv;
1234 }
1235
1236 FL int
1237 c_remove(void *v)
1238 {
1239    char const *fmt;
1240    size_t fmt_len;
1241    char **args = v, *name;
1242    int ec = 0;
1243    NYD_ENTER;
1244
1245    if (*args == NULL) {
1246       n_err(_("Synopsis: remove: <mailbox>...\n"));
1247       ec = 1;
1248       goto jleave;
1249    }
1250
1251    fmt = _("Remove \"%s\" (y/n) ? ");
1252    fmt_len = strlen(fmt);
1253    do {
1254       if ((name = expand(*args)) == NULL)
1255          continue;
1256
1257       if (!strcmp(name, mailname)) {
1258          n_err(_("Cannot remove current mailbox \"%s\"\n"), name);
1259          ec |= 1;
1260          continue;
1261       }
1262       {
1263          size_t vl = strlen(name) + fmt_len +1;
1264          char *vb = ac_alloc(vl);
1265          bool_t asw;
1266          snprintf(vb, vl, fmt, name);
1267          asw = getapproval(vb, TRU1);
1268          ac_free(vb);
1269          if (!asw)
1270             continue;
1271       }
1272
1273       switch (which_protocol(name)) {
1274       case PROTO_FILE:
1275          if (unlink(name) == -1) { /* TODO do not handle .gz .bz2 .xz.. */
1276             n_perr(name, 0);
1277             ec |= 1;
1278          }
1279          break;
1280       case PROTO_POP3:
1281          n_err(_("Cannot remove POP3 mailbox \"%s\"\n"),name);
1282          ec |= 1;
1283          break;
1284       case PROTO_MAILDIR:
1285          if (maildir_remove(name) != OKAY)
1286             ec |= 1;
1287          break;
1288       case PROTO_UNKNOWN:
1289          n_err(_("Unknown protocol in \"%s\"; not removed\n"), name);
1290          ec |= 1;
1291          break;
1292       }
1293    } while (*++args != NULL);
1294 jleave:
1295    NYD_LEAVE;
1296    return ec;
1297 }
1298
1299 FL int
1300 c_rename(void *v)
1301 {
1302    char **args = v, *old, *new;
1303    enum protocol oldp, newp;
1304    int ec;
1305    NYD_ENTER;
1306
1307    ec = 1;
1308
1309    if (args[0] == NULL || args[1] == NULL || args[2] != NULL) {
1310       n_err(_("Synopsis: rename: <old> <new>\n"));
1311       goto jleave;
1312    }
1313
1314    if ((old = expand(args[0])) == NULL)
1315       goto jleave;
1316    oldp = which_protocol(old);
1317    if ((new = expand(args[1])) == NULL)
1318       goto jleave;
1319    newp = which_protocol(new);
1320
1321    if (!strcmp(old, mailname) || !strcmp(new, mailname)) {
1322       n_err(_("Cannot rename current mailbox \"%s\"\n"), old);
1323       goto jleave;
1324    }
1325
1326    ec = 0;
1327
1328    if (newp == PROTO_POP3)
1329       goto jnopop3;
1330    switch (oldp) {
1331    case PROTO_FILE:
1332       if (link(old, new) == -1) {
1333          switch (errno) {
1334          case EACCES:
1335          case EEXIST:
1336          case ENAMETOOLONG:
1337          case ENOENT:
1338          case ENOSPC:
1339          case EXDEV:
1340             n_perr(new, 0);
1341             break;
1342          default:
1343             n_perr(old, 0);
1344             break;
1345          }
1346          ec |= 1;
1347       } else if (unlink(old) == -1) {
1348          n_perr(old, 0);
1349          ec |= 1;
1350       }
1351       break;
1352    case PROTO_MAILDIR:
1353       if (rename(old, new) == -1) {
1354          n_perr(old, 0);
1355          ec |= 1;
1356       }
1357       break;
1358    case PROTO_POP3:
1359 jnopop3:
1360       n_err(_("Cannot rename POP3 mailboxes\n"));
1361       ec |= 1;
1362       break;
1363    case PROTO_UNKNOWN:
1364    default:
1365       n_err(_("Unknown protocol in \"%s\" and \"%s\"; not renamed\n"),
1366          old, new);
1367       ec |= 1;
1368       break;
1369    }
1370 jleave:
1371    NYD_LEAVE;
1372    return ec;
1373 }
1374
1375 FL int
1376 c_urlencode(void *v) /* XXX IDNA?? */
1377 {
1378    char **ap;
1379    NYD_ENTER;
1380
1381    for (ap = v; *ap != NULL; ++ap) {
1382       char *in = *ap, *out = urlxenc(in, FAL0);
1383
1384       printf(" in: <%s> (%" PRIuZ " bytes)\nout: <%s> (%" PRIuZ " bytes)\n",
1385          in, strlen(in), out, strlen(out));
1386    }
1387    NYD_LEAVE;
1388    return 0;
1389 }
1390
1391 FL int
1392 c_urldecode(void *v) /* XXX IDNA?? */
1393 {
1394    char **ap;
1395    NYD_ENTER;
1396
1397    for (ap = v; *ap != NULL; ++ap) {
1398       char *in = *ap, *out = urlxdec(in);
1399
1400       printf(" in: <%s> (%" PRIuZ " bytes)\nout: <%s> (%" PRIuZ " bytes)\n",
1401          in, strlen(in), out, strlen(out));
1402    }
1403    NYD_LEAVE;
1404    return 0;
1405 }
1406
1407 /* s-it-mode */