acmava.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Account, macro and variable handling.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2014 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. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *    This product includes software developed by the University of
  22  *    California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 #ifndef HAVE_AMALGAMATION
  41 # include "nail.h"
  42 #endif
  43
  44 /*
  45  * HOWTO add a new non-dynamic binary or value option:
  46  * - add an entry to nail.h:enum okeys
  47  * - run create-okey-map.pl
  48  * - update nail.1
  49  */
  50
  51 /* Note: changing the hash function must be reflected in create-okey-map.pl */
  52 #define MA_PRIME           HSHSIZE
  53 #define MA_NAME2HASH(N)    torek_hash(N)
  54 #define MA_HASH2PRIME(H)   ((H) % MA_PRIME)
  55
  56 enum ma_flags {
  57    MA_NONE        = 0,
  58    MA_ACC         = 1<<0,
  59    MA_TYPE_MASK   = MA_ACC,
  60    MA_UNDEF       = 1<<1         /* Unlink after lookup */
  61 };
  62
  63 struct macro {
  64    struct macro   *ma_next;
  65    char           *ma_name;
  66    struct mline   *ma_contents;
  67    size_t         ma_maxlen;     /* Maximum line length */
  68    enum ma_flags  ma_flags;
  69    struct var     *ma_localopts; /* `account' unroll list, for `localopts' */
  70 };
  71
  72 struct mline {
  73    struct mline   *l_next;
  74    size_t         l_length;
  75    char           l_line[VFIELD_SIZE(sizeof(size_t))];
  76 };
  77
  78 struct var {
  79    struct var     *v_link;
  80    char           *v_value;
  81    char           v_name[VFIELD_SIZE(sizeof(size_t))];
  82 };
  83
  84 struct var_map {
  85    ui32_t         vm_hash;
  86    ui16_t         vm_keyoff;
  87    ui8_t          vm_binary;
  88    ui8_t          vm_special;
  89 };
  90
  91 struct var_carrier {
  92    char const     *vc_name;
  93    ui32_t         vc_hash;
  94    ui32_t         vc_prime;
  95    struct var     *vc_var;
  96    struct var_map const *vc_vmap;
  97    enum okeys     vc_okey;
  98 };
  99
 100 struct lostack {
 101    struct lostack *s_up;         /* Outer context */
 102    struct macro   *s_mac;        /* Context (`account' or `define') */
 103    struct var     *s_localopts;
 104    bool_t         s_unroll;      /* Unroll? */
 105 };
 106
 107 /* Include the constant create-okey-map.pl output */
 108 #include "okeys.h"
 109
 110 static struct macro  *_acc_curr;    /* Currently active account */
 111 static struct lostack *_localopts;  /* Currently executing macro unroll list */
 112
 113 /* TODO once we have a dynamically sized hashtable we could unite _macros and
 114  * TODO _variables into a single hashtable, stripping down fun interface;
 115  * TODO also, setting and clearing a variable can be easily joined */
 116 static struct var    *_vars[MA_PRIME];    /* TODO dynamically spaced */
 117 static struct macro  *_macros[MA_PRIME];  /* TODO dynamically spaced */
 118
 119 /* Special cased value string allocation */
 120 static char *        _var_vcopy(char const *str);
 121 static void          _var_vfree(char *cp);
 122
 123 /* Check for special housekeeping. */
 124 static bool_t        _var_check_specials(enum okeys okey, bool_t enable,
 125                         char **val);
 126
 127 /* If a variable name begins with a lowercase-character and contains at
 128  * least one '@', it is converted to all-lowercase. This is necessary
 129  * for lookups of names based on email addresses.
 130  * Following the standard, only the part following the last '@' should
 131  * be lower-cased, but practice has established otherwise here.
 132  * Return value may have been placed in string dope (salloc()) */
 133 static char const *  _var_canonify(char const *vn);
 134
 135 /* Try to reverse lookup an option name to an enum okeys mapping.
 136  * Updates vcp.vc_name and vcp.vc_hash; vcp.vc_vmap is NULL if none found */
 137 static bool_t        _var_revlookup(struct var_carrier *vcp, char const *name);
 138
 139 /* Lookup a variable from vcp.vc_(vmap|name|hash), return wether it was found.
 140  * Sets vcp.vc_prime; vcp.vc_var is NULL if not found */
 141 static bool_t        _var_lookup(struct var_carrier *vcp);
 142
 143 /* Set variable from vcp.vc_(vmap|name|hash), return wether error occurred */
 144 static bool_t        _var_set(struct var_carrier *vcp, char const *value);
 145
 146 /* Clear variable from vcp.vc_(vmap|name|hash); sets vcp.vc_var to NULL,
 147  * return wether error occurred */
 148 static bool_t        _var_clear(struct var_carrier *vcp);
 149
 150 /* var_list_all(): qsort(3) helper */
 151 static int           _var_list_all_cmp(void const *s1, void const *s2);
 152
 153 /* Shared c_set() and c_setenv() impl, return wether error(s) occurred */
 154 static bool_t        _var_set_env(char **ap, bool_t issetenv);
 155
 156 /* Does cp consist solely of WS and a } */
 157 static bool_t        _is_closing_angle(char const *cp);
 158
 159 /* Lookup for macros/accounts */
 160 static struct macro *_ma_look(char const *name, struct macro *data,
 161                         enum ma_flags mafl);
 162
 163 /* Walk all lines of a macro and execute() them */
 164 static int           _ma_exec(struct macro const *mp, struct var **unroller);
 165
 166 /* User display helpers */
 167 static int           _ma_list(enum ma_flags mafl);
 168
 169 /* */
 170 static bool_t        _ma_define1(char const *name, enum ma_flags mafl);
 171 static void          _ma_undef1(char const *name, enum ma_flags mafl);
 172 static void          _ma_freelines(struct mline *lp);
 173
 174 /* Update replay-log */
 175 static void          _localopts_add(struct lostack *losp, char const *name,
 176                         struct var *ovap);
 177 static void          _localopts_unroll(struct var **vapp);
 178
 179 static char *
 180 _var_vcopy(char const *str)
 181 {
 182    char *news;
 183    size_t len;
 184    NYD_ENTER;
 185
 186    if (*str == '\0')
 187       news = UNCONST("");
 188    else {
 189       len = strlen(str) +1;
 190       news = smalloc(len);
 191       memcpy(news, str, len);
 192    }
 193    NYD_LEAVE;
 194    return news;
 195 }
 196
 197 static void
 198 _var_vfree(char *cp)
 199 {
 200    NYD_ENTER;
 201    if (*cp != '\0')
 202       free(cp);
 203    NYD_LEAVE;
 204 }
 205
 206 static bool_t
 207 _var_check_specials(enum okeys okey, bool_t enable, char **val)
 208 {
 209    char *cp = NULL;
 210    bool_t rv = TRU1;
 211    int flag = 0;
 212    NYD_ENTER;
 213
 214    switch (okey) {
 215    case ok_b_debug:
 216       flag = OPT_DEBUG;
 217       break;
 218    case ok_b_header:
 219       flag = OPT_N_FLAG;
 220       enable = !enable;
 221       break;
 222    case ok_b_skipemptybody:
 223       flag = OPT_E_FLAG;
 224       break;
 225    case ok_b_verbose:
 226       flag = (enable && !(options & OPT_VERB))
 227             ? OPT_VERB : OPT_VERB | OPT_VERBVERB;
 228       break;
 229    case ok_v_folder:
 230       rv = (val == NULL || var_folder_updated(*val, &cp));
 231       if (rv && cp != NULL) {
 232          _var_vfree(*val);
 233          /* It's smalloc()ed, but ensure we don't leak */
 234          if (*cp == '\0') {
 235             *val = UNCONST("");
 236             free(cp);
 237          } else
 238             *val = cp;
 239       }
 240       break;
 241 #ifdef HAVE_NCL
 242    case ok_v_line_editor_cursor_right:
 243       if ((rv = (val != NULL && *val != NULL))) {
 244          /* Set with no value? TODO very guly */
 245          if (*(cp = *val) != '\0') {
 246             char const *x = cp;
 247             int c;
 248             do {
 249                c = expand_shell_escape(&x, FAL0);
 250                if (c < 0)
 251                   break;
 252                *cp++ = (char)c;
 253             } while (*x != '\0');
 254             *cp = '\0';
 255          }
 256       }
 257       break;
 258 #endif
 259    default:
 260       break;
 261    }
 262
 263    if (flag) {
 264       if (enable)
 265          options |= flag;
 266       else
 267          options &= ~flag;
 268    }
 269    NYD_LEAVE;
 270    return rv;
 271 }
 272
 273 static char const *
 274 _var_canonify(char const *vn)
 275 {
 276    NYD_ENTER;
 277    if (!upperchar(*vn)) {
 278       char const *vp;
 279
 280       for (vp = vn; *vp != '\0' && *vp != '@'; ++vp)
 281          ;
 282       vn = (*vp == '@') ? i_strdup(vn) : vn;
 283    }
 284    NYD_LEAVE;
 285    return vn;
 286 }
 287
 288 static bool_t
 289 _var_revlookup(struct var_carrier *vcp, char const *name)
 290 {
 291    ui32_t hash, i, j;
 292    struct var_map const *vmp;
 293    NYD_ENTER;
 294
 295    vcp->vc_name = name = _var_canonify(name);
 296    vcp->vc_hash = hash = MA_NAME2HASH(name);
 297
 298    for (i = hash % _VAR_REV_PRIME, j = 0; j <= _VAR_REV_LONGEST; ++j) {
 299       ui32_t x = _var_revmap[i];
 300       if (x == _VAR_REV_ILL)
 301          break;
 302       vmp = _var_map + x;
 303       if (vmp->vm_hash == hash && !strcmp(_var_keydat + vmp->vm_keyoff, name)) {
 304          vcp->vc_vmap = vmp;
 305          vcp->vc_okey = (enum okeys)x;
 306          goto jleave;
 307       }
 308       if (++i == _VAR_REV_PRIME) {
 309 #ifdef _VAR_REV_WRAPAROUND
 310          i = 0;
 311 #else
 312          break;
 313 #endif
 314       }
 315    }
 316    vcp->vc_vmap = NULL;
 317    vcp = NULL;
 318 jleave:
 319    NYD_LEAVE;
 320    return (vcp != NULL);
 321 }
 322
 323 static bool_t
 324 _var_lookup(struct var_carrier *vcp)
 325 {
 326    struct var **vap, *lvp, *vp;
 327    NYD_ENTER;
 328
 329    vap = _vars + (vcp->vc_prime = MA_HASH2PRIME(vcp->vc_hash));
 330
 331    for (lvp = NULL, vp = *vap; vp != NULL; lvp = vp, vp = vp->v_link)
 332       if (!strcmp(vp->v_name, vcp->vc_name)) {
 333          /* Relink as head, hope it "sorts on usage" over time.
 334           * _var_clear() relies on this behaviour */
 335          if (lvp != NULL) {
 336             lvp->v_link = vp->v_link;
 337             vp->v_link = *vap;
 338             *vap = vp;
 339          }
 340          goto jleave;
 341       }
 342    vp = NULL;
 343 jleave:
 344    vcp->vc_var = vp;
 345    NYD_LEAVE;
 346    return (vp != NULL);
 347 }
 348
 349 static bool_t
 350 _var_set(struct var_carrier *vcp, char const *value)
 351 {
 352    bool_t err;
 353    struct var *vp;
 354    char *oval;
 355    NYD_ENTER;
 356
 357    if (value == NULL) {
 358       bool_t tmp = var_clear_allow_undefined;
 359       var_clear_allow_undefined = TRU1;
 360       err = _var_clear(vcp);
 361       var_clear_allow_undefined = tmp;
 362       goto jleave;
 363    }
 364
 365    _var_lookup(vcp);
 366
 367    /* Don't care what happens later on, store this in the unroll list */
 368    if (_localopts != NULL)
 369       _localopts_add(_localopts, vcp->vc_name, vcp->vc_var);
 370
 371    if ((vp = vcp->vc_var) == NULL) {
 372       size_t l = strlen(vcp->vc_name) + 1;
 373
 374       vcp->vc_var =
 375       vp = smalloc(sizeof(*vp) - VFIELD_SIZEOF(struct var, v_name) + l);
 376       vp->v_link = _vars[vcp->vc_prime];
 377       _vars[vcp->vc_prime] = vp;
 378       memcpy(vp->v_name, vcp->vc_name, l);
 379       oval = UNCONST("");
 380    } else
 381       oval = vp->v_value;
 382    vp->v_value = _var_vcopy(value);
 383
 384    /* Check if update allowed XXX wasteful on error! */
 385    if (vcp->vc_vmap != NULL && vcp->vc_vmap->vm_special &&
 386          (err = !_var_check_specials(vcp->vc_okey, TRU1, &vp->v_value))) {
 387       char *cp = vp->v_value;
 388       vp->v_value = oval;
 389       oval = cp;
 390    }
 391    if (*oval != '\0')
 392       _var_vfree(oval);
 393    err = FAL0;
 394 jleave:
 395    NYD_LEAVE;
 396    return err;
 397 }
 398
 399 static bool_t
 400 _var_clear(struct var_carrier *vcp)
 401 {
 402    bool_t err = TRU1;
 403    NYD_ENTER;
 404
 405    if (!_var_lookup(vcp)) {
 406       if (!sourcing && !var_clear_allow_undefined) {
 407          fprintf(stderr, tr(203, "`%s': undefined variable\n"), vcp->vc_name);
 408          goto jleave;
 409       }
 410    } else {
 411       if (_localopts != NULL)
 412          _localopts_add(_localopts, vcp->vc_name, vcp->vc_var);
 413
 414       /* Always listhead after _var_lookup() */
 415       _vars[vcp->vc_prime] = _vars[vcp->vc_prime]->v_link;
 416       _var_vfree(vcp->vc_var->v_value);
 417       free(vcp->vc_var);
 418       vcp->vc_var = NULL;
 419
 420       if (vcp->vc_vmap != NULL && vcp->vc_vmap->vm_special &&
 421             !_var_check_specials(vcp->vc_okey, FAL0, NULL))
 422          goto jleave;
 423    }
 424    err = FAL0;
 425 jleave:
 426    NYD_LEAVE;
 427    return err;
 428 }
 429
 430 static int
 431 _var_list_all_cmp(void const *s1, void const *s2)
 432 {
 433    int rv;
 434    NYD_ENTER;
 435
 436    rv = strcmp(*(char**)UNCONST(s1), *(char**)UNCONST(s2));
 437    NYD_LEAVE;
 438    return rv;
 439 }
 440
 441 static bool_t
 442 _var_set_env(char **ap, bool_t issetenv)
 443 {
 444    char *cp, *cp2, *varbuf, c;
 445    size_t errs = 0;
 446    NYD_ENTER;
 447
 448    for (; *ap != NULL; ++ap) {
 449       /* Isolate key */
 450       cp = *ap;
 451       cp2 = varbuf = ac_alloc(strlen(cp) +1);
 452       for (; (c = *cp) != '=' && c != '\0'; ++cp)
 453          *cp2++ = c;
 454       *cp2 = '\0';
 455       if (c == '\0')
 456          cp = UNCONST("");
 457       else
 458          ++cp;
 459       if (varbuf == cp2) {
 460          fprintf(stderr, tr(41, "Non-null variable name required\n"));
 461          ++errs;
 462          goto jnext;
 463       }
 464
 465       if (!issetenv && varbuf[0] == 'n' && varbuf[1] == 'o')
 466          errs += _var_vokclear(varbuf + 2);
 467       else {
 468          errs += _var_vokset(varbuf, (uintptr_t)cp);
 469          if (issetenv) {
 470 #ifdef HAVE_SETENV
 471             errs += (setenv(varbuf, cp, 1) != 0);
 472 #else
 473             ++errs;
 474 #endif
 475          }
 476       }
 477 jnext:
 478       ac_free(varbuf);
 479    }
 480
 481    NYD_LEAVE;
 482    return (errs != 0);
 483 }
 484
 485 static bool_t
 486 _is_closing_angle(char const *cp)
 487 {
 488    bool_t rv = FAL0;
 489    NYD_ENTER;
 490
 491    while (spacechar(*cp))
 492       ++cp;
 493    if (*cp++ != '}')
 494       goto jleave;
 495    while (spacechar(*cp))
 496       ++cp;
 497    rv = (*cp == '\0');
 498 jleave:
 499    NYD_LEAVE;
 500    return rv;
 501 }
 502
 503 static struct macro *
 504 _ma_look(char const *name, struct macro *data, enum ma_flags mafl)
 505 {
 506    enum ma_flags save_mafl;
 507    ui32_t h;
 508    struct macro *lmp, *mp;
 509    NYD_ENTER;
 510
 511    save_mafl = mafl;
 512    mafl &= MA_TYPE_MASK;
 513    h = MA_NAME2HASH(name);
 514    h = MA_HASH2PRIME(h);
 515
 516    for (lmp = NULL, mp = _macros[h]; mp != NULL; lmp = mp, mp = mp->ma_next) {
 517       if ((mp->ma_flags & MA_TYPE_MASK) == mafl && !strcmp(mp->ma_name, name)) {
 518          if (save_mafl & MA_UNDEF) {
 519             if (lmp == NULL)
 520                _macros[h] = mp->ma_next;
 521             else
 522                lmp->ma_next = mp->ma_next;
 523          }
 524          goto jleave;
 525       }
 526    }
 527
 528    if (data != NULL) {
 529       data->ma_next = _macros[h];
 530       _macros[h] = data;
 531       mp = NULL;
 532    }
 533 jleave:
 534    NYD_LEAVE;
 535    return mp;
 536 }
 537
 538 static int
 539 _ma_exec(struct macro const *mp, struct var **unroller)
 540 {
 541    struct lostack los;
 542    int rv = 0;
 543    char *buf;
 544    struct mline const *lp;
 545    NYD_ENTER;
 546
 547    los.s_up = _localopts;
 548    los.s_mac = UNCONST(mp);
 549    los.s_localopts = NULL;
 550    los.s_unroll = FAL0;
 551    _localopts = &los;
 552
 553    buf = ac_alloc(mp->ma_maxlen +1);
 554    for (lp = mp->ma_contents; lp; lp = lp->l_next) {
 555       var_clear_allow_undefined = TRU1;
 556       memcpy(buf, lp->l_line, lp->l_length +1);
 557       temporary_localopts_store = _localopts; /* XXX intermediate hack */
 558       /* FIXME if the execute() jumps away (via INT) then our internal state
 559        * FIXME is messed up, even though temporary_localopts_free() is likely
 560        * FIXME to correct some of that */
 561       rv |= execute(buf, 0, lp->l_length); /* XXX break if != 0 ? */
 562       temporary_localopts_store = NULL;  /* XXX intermediate hack */
 563       var_clear_allow_undefined = FAL0;
 564    }
 565    ac_free(buf);
 566
 567    _localopts = los.s_up;
 568    if (unroller == NULL) {
 569       if (los.s_localopts != NULL)
 570          _localopts_unroll(&los.s_localopts);
 571    } else
 572       *unroller = los.s_localopts;
 573    NYD_LEAVE;
 574    return rv;
 575 }
 576
 577 static int
 578 _ma_list(enum ma_flags mafl)
 579 {
 580    FILE *fp;
 581    char const *typestr;
 582    struct macro *mq;
 583    ui32_t ti, mc;
 584    struct mline *lp;
 585    NYD_ENTER;
 586
 587    if ((fp = Ftmp(NULL, "listmacs", OF_RDWR | OF_UNLINK | OF_REGISTER, 0600)) ==
 588          NULL) {
 589       perror("tmpfile");
 590       mc = 1;
 591       goto jleave;
 592    }
 593
 594    mafl &= MA_TYPE_MASK;
 595    typestr = (mafl & MA_ACC) ? "account" : "define";
 596
 597    for (ti = mc = 0; ti < MA_PRIME; ++ti)
 598       for (mq = _macros[ti]; mq; mq = mq->ma_next)
 599          if ((mq->ma_flags & MA_TYPE_MASK) == mafl) {
 600             if (++mc > 1)
 601                fputc('\n', fp);
 602             fprintf(fp, "%s %s {\n", typestr, mq->ma_name);
 603             for (lp = mq->ma_contents; lp != NULL; lp = lp->l_next)
 604                fprintf(fp, "  %s\n", lp->l_line);
 605             fputs("}\n", fp);
 606          }
 607    if (mc)
 608       page_or_print(fp, 0);
 609
 610    mc = (ui32_t)ferror(fp);
 611    Fclose(fp);
 612 jleave:
 613    NYD_LEAVE;
 614    return (int)mc;
 615 }
 616
 617 static bool_t
 618 _ma_define1(char const *name, enum ma_flags mafl)
 619 {
 620    bool_t rv = FAL0;
 621    struct macro *mp;
 622    struct mline *lp, *lst = NULL, *lnd = NULL;
 623    char *linebuf = NULL, *cp;
 624    size_t linesize = 0, maxlen = 0;
 625    int n, i;
 626    NYD_ENTER;
 627
 628    mp = scalloc(1, sizeof *mp);
 629    mp->ma_name = sstrdup(name);
 630    mp->ma_flags = mafl;
 631
 632    for (;;) {
 633       n = readline_input("", TRU1, &linebuf, &linesize, NULL);
 634       if (n == 0)
 635          continue;
 636       if (n < 0) {
 637          fprintf(stderr, tr(75, "Unterminated %s definition: \"%s\".\n"),
 638             (mafl & MA_ACC ? "account" : "macro"), mp->ma_name);
 639          if (sourcing && !loading)
 640             unstack();
 641          goto jerr;
 642       }
 643       if (_is_closing_angle(linebuf))
 644          break;
 645
 646       /* Trim WS */
 647       for (cp = linebuf, i = 0; i < n; ++cp, ++i)
 648          if (!whitechar(*cp))
 649             break;
 650       if (i == n)
 651          continue;
 652       n -= i;
 653       while (whitechar(cp[n - 1]))
 654          if (--n == 0)
 655             break;
 656       if (n == 0)
 657          continue;
 658
 659       maxlen = MAX(maxlen, (size_t)n);
 660       cp[n++] = '\0';
 661
 662       lp = scalloc(1, sizeof(*lp) - VFIELD_SIZEOF(struct mline, l_line) + n);
 663       memcpy(lp->l_line, cp, n);
 664       lp->l_length = (size_t)--n;
 665       if (lst != NULL) {
 666          lnd->l_next = lp;
 667          lnd = lp;
 668       } else
 669          lst = lnd = lp;
 670    }
 671    mp->ma_contents = lst;
 672    mp->ma_maxlen = maxlen;
 673
 674    if (_ma_look(mp->ma_name, mp, mafl) != NULL) {
 675       fprintf(stderr, tr(76, "A %s named `%s' already exists.\n"),
 676          (mafl & MA_ACC ? "account" : "macro"), mp->ma_name);
 677       lst = mp->ma_contents;
 678       goto jerr;
 679    }
 680
 681    rv = TRU1;
 682 jleave:
 683    if (linebuf != NULL)
 684       free(linebuf);
 685    NYD_LEAVE;
 686    return rv;
 687
 688 jerr:
 689    if (lst != NULL)
 690       _ma_freelines(lst);
 691    free(mp->ma_name);
 692    free(mp);
 693    goto jleave;
 694 }
 695
 696 static void
 697 _ma_undef1(char const *name, enum ma_flags mafl)
 698 {
 699    struct macro *mp;
 700    NYD_ENTER;
 701
 702    if ((mp = _ma_look(name, NULL, mafl | MA_UNDEF)) != NULL) {
 703       _ma_freelines(mp->ma_contents);
 704       free(mp->ma_name);
 705       free(mp);
 706    } else
 707       fprintf(stderr, tr(571, "%s `%s' is not defined\n"),
 708          (mafl & MA_ACC ? "Account" : "Macro"), name);
 709    NYD_LEAVE;
 710 }
 711
 712 static void
 713 _ma_freelines(struct mline *lp)
 714 {
 715    struct mline *lq;
 716    NYD_ENTER;
 717
 718    for (lq = NULL; lp != NULL; ) {
 719       if (lq != NULL)
 720          free(lq);
 721       lq = lp;
 722       lp = lp->l_next;
 723    }
 724    if (lq)
 725       free(lq);
 726    NYD_LEAVE;
 727 }
 728
 729 static void
 730 _localopts_add(struct lostack *losp, char const *name, struct var *ovap)
 731 {
 732    struct var *vap;
 733    size_t nl, vl;
 734    NYD_ENTER;
 735
 736    /* Propagate unrolling up the stack, as necessary */
 737    while (!losp->s_unroll && (losp = losp->s_up) != NULL)
 738       ;
 739    if (losp == NULL)
 740       goto jleave;
 741
 742    /* We've found a level that wants to unroll; check wether it does it yet */
 743    for (vap = losp->s_localopts; vap != NULL; vap = vap->v_link)
 744       if (!strcmp(vap->v_name, name))
 745          goto jleave;
 746
 747    nl = strlen(name) + 1;
 748    vl = (ovap != NULL) ? strlen(ovap->v_value) + 1 : 0;
 749    vap = smalloc(sizeof(*vap) - VFIELD_SIZEOF(struct var, v_name) + nl + vl);
 750    vap->v_link = losp->s_localopts;
 751    losp->s_localopts = vap;
 752    memcpy(vap->v_name, name, nl);
 753    if (vl == 0)
 754       vap->v_value = NULL;
 755    else {
 756       vap->v_value = vap->v_name + nl;
 757       memcpy(vap->v_value, ovap->v_value, vl);
 758    }
 759 jleave:
 760    NYD_LEAVE;
 761 }
 762
 763 static void
 764 _localopts_unroll(struct var **vapp)
 765 {
 766    struct lostack *save_los;
 767    struct var *x, *vap;
 768    NYD_ENTER;
 769
 770    vap = *vapp;
 771    *vapp = NULL;
 772
 773    save_los = _localopts;
 774    _localopts = NULL;
 775    while (vap != NULL) {
 776       x = vap;
 777       vap = vap->v_link;
 778       vok_vset(x->v_name, x->v_value);
 779       free(x);
 780    }
 781    _localopts = save_los;
 782    NYD_LEAVE;
 783 }
 784
 785 FL char *
 786 _var_oklook(enum okeys okey)
 787 {
 788    struct var_carrier vc;
 789    char *rv;
 790    NYD_ENTER;
 791
 792    vc.vc_vmap = _var_map + okey;
 793    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 794    vc.vc_hash = _var_map[okey].vm_hash;
 795    vc.vc_okey = okey;
 796
 797    if (!_var_lookup(&vc)) {
 798       if ((rv = getenv(vc.vc_name)) != NULL) {
 799          _var_set(&vc, rv);
 800          assert(vc.vc_var != NULL);
 801          goto jvar;
 802       }
 803    } else
 804 jvar:
 805       rv = vc.vc_var->v_value;
 806    NYD_LEAVE;
 807    return rv;
 808 }
 809
 810 FL bool_t
 811 _var_okset(enum okeys okey, uintptr_t val)
 812 {
 813    struct var_carrier vc;
 814    bool_t rv;
 815    NYD_ENTER;
 816
 817    vc.vc_vmap = _var_map + okey;
 818    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 819    vc.vc_hash = _var_map[okey].vm_hash;
 820    vc.vc_okey = okey;
 821
 822    rv = _var_set(&vc, (val == 0x1 ? "" : (char const*)val));
 823    NYD_LEAVE;
 824    return rv;
 825 }
 826
 827 FL bool_t
 828 _var_okclear(enum okeys okey)
 829 {
 830    struct var_carrier vc;
 831    bool_t rv;
 832    NYD_ENTER;
 833
 834    vc.vc_vmap = _var_map + okey;
 835    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 836    vc.vc_hash = _var_map[okey].vm_hash;
 837    vc.vc_okey = okey;
 838
 839    rv = _var_clear(&vc);
 840    NYD_LEAVE;
 841    return rv;
 842 }
 843
 844 FL char *
 845 _var_voklook(char const *vokey)
 846 {
 847    struct var_carrier vc;
 848    char *rv;
 849    NYD_ENTER;
 850
 851    _var_revlookup(&vc, vokey);
 852
 853    if (!_var_lookup(&vc)) {
 854       if ((rv = getenv(vc.vc_name)) != NULL) {
 855          _var_set(&vc, rv);
 856          assert(vc.vc_var != NULL);
 857          goto jvar;
 858       }
 859    } else
 860 jvar:
 861       rv = vc.vc_var->v_value;
 862    NYD_LEAVE;
 863    return rv;
 864 }
 865
 866 FL bool_t
 867 _var_vokset(char const *vokey, uintptr_t val)
 868 {
 869    struct var_carrier vc;
 870    bool_t err;
 871    NYD_ENTER;
 872
 873    _var_revlookup(&vc, vokey);
 874
 875    err = _var_set(&vc, (val == 0x1 ? "" : (char const*)val));
 876    NYD_LEAVE;
 877    return err;
 878 }
 879
 880 FL bool_t
 881 _var_vokclear(char const *vokey)
 882 {
 883    struct var_carrier vc;
 884    bool_t err;
 885    NYD_ENTER;
 886
 887    _var_revlookup(&vc, vokey);
 888
 889    err = _var_clear(&vc);
 890    NYD_LEAVE;
 891    return err;
 892 }
 893
 894 FL void
 895 var_list_all(void)
 896 {
 897    FILE *fp;
 898    char **vacp, **cap;
 899    struct var *vp;
 900    size_t no, i;
 901    char const *fmt;
 902    NYD_ENTER;
 903
 904    if ((fp = Ftmp(NULL, "listvars", OF_RDWR | OF_UNLINK | OF_REGISTER, 0600)) ==
 905          NULL) {
 906       perror("tmpfile");
 907       goto jleave;
 908    }
 909
 910    for (no = i = 0; i < MA_PRIME; ++i)
 911       for (vp = _vars[i]; vp != NULL; vp = vp->v_link)
 912          ++no;
 913    vacp = salloc(no * sizeof(*vacp));
 914    for (cap = vacp, i = 0; i < MA_PRIME; ++i)
 915       for (vp = _vars[i]; vp != NULL; vp = vp->v_link)
 916          *cap++ = vp->v_name;
 917
 918    if (no > 1)
 919       qsort(vacp, no, sizeof *vacp, &_var_list_all_cmp);
 920
 921    i = (ok_blook(bsdcompat) || ok_blook(bsdset));
 922    fmt = (i != 0) ? "%s\t%s\n" : "%s=\"%s\"\n";
 923
 924    for (cap = vacp; no != 0; ++cap, --no) {
 925       char *cp = vok_vlook(*cap); /* XXX when lookup checks val/bin, change */
 926       if (cp == NULL)
 927          cp = UNCONST("");
 928       if (i || *cp != '\0')
 929          fprintf(fp, fmt, *cap, cp);
 930       else
 931          fprintf(fp, "%s\n", *cap);
 932    }
 933
 934    page_or_print(fp, PTR2SIZE(cap - vacp));
 935    Fclose(fp);
 936 jleave:
 937    NYD_LEAVE;
 938 }
 939
 940 FL int
 941 c_varshow(void *v)
 942 {
 943    struct var_carrier vc;
 944    char **argv = v, *val;
 945    bool_t isenv, isset;
 946    NYD_ENTER;
 947
 948    if (*argv == NULL) {
 949       v = NULL;
 950       goto jleave;
 951    }
 952
 953    for (; *argv != NULL; ++argv) {
 954       memset(&vc, 0, sizeof vc);
 955       _var_revlookup(&vc, *argv);
 956       if (_var_lookup(&vc)) {
 957          val = vc.vc_var->v_value;
 958          isenv = FAL0;
 959       } else
 960          isenv = ((val = getenv(vc.vc_name)) != NULL);
 961       if (val == NULL)
 962          val = UNCONST("NULL");
 963       isset = (vc.vc_var != NULL);
 964
 965       if (vc.vc_vmap != NULL) {
 966          if (vc.vc_vmap->vm_binary)
 967             printf("%s: binary option (%d): isset=%d/environ=%d\n",
 968                vc.vc_name, vc.vc_okey, isset, isenv);
 969          else
 970             printf("%s: value option (%d): isset=%d/environ=%d value<%s>\n",
 971                vc.vc_name, vc.vc_okey, isset, isenv, val);
 972       } else
 973          printf("%s: isset=%d/environ=%d value<%s>\n",
 974             vc.vc_name, isset, isenv, val);
 975    }
 976 jleave:
 977    NYD_LEAVE;
 978    return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
 979 }
 980
 981 FL int
 982 c_set(void *v)
 983 {
 984    char **ap = v;
 985    int err;
 986    NYD_ENTER;
 987
 988    if (*ap == NULL) {
 989       var_list_all();
 990       err = 0;
 991    } else
 992       err = _var_set_env(ap, FAL0);
 993    NYD_LEAVE;
 994    return err;
 995 }
 996
 997 FL int
 998 c_setenv(void *v)
 999 {
1000    char **ap = v;
1001    int err;
1002    NYD_ENTER;
1003
1004    if (!(err = starting))
1005       err = _var_set_env(ap, TRU1);
1006    NYD_LEAVE;
1007    return err;
1008 }
1009
1010 FL int
1011 c_unset(void *v)
1012 {
1013    char **ap = v;
1014    int err = 0;
1015    NYD_ENTER;
1016
1017    while (*ap != NULL)
1018       err |= _var_vokclear(*ap++);
1019    NYD_LEAVE;
1020    return err;
1021 }
1022
1023 FL int
1024 c_unsetenv(void *v)
1025 {
1026    int err;
1027    NYD_ENTER;
1028
1029    if (!(err = starting)) {
1030       char **ap;
1031       bool_t tmp = var_clear_allow_undefined;
1032       var_clear_allow_undefined = TRU1;
1033       for (ap = v; *ap != NULL; ++ap) {
1034          bool_t bad = _var_vokclear(*ap);
1035          if (
1036 #ifdef HAVE_SETENV
1037                unsetenv(*ap) != 0 &&
1038 #endif
1039                bad
1040          )
1041             err = 1;
1042       }
1043       var_clear_allow_undefined = tmp;
1044    }
1045    NYD_LEAVE;
1046    return err;
1047 }
1048
1049 FL int
1050 c_define(void *v)
1051 {
1052    int rv = 1;
1053    char **args = v;
1054    NYD_ENTER;
1055
1056    if (args[0] == NULL) {
1057       rv = _ma_list(MA_NONE);
1058       goto jleave;
1059    }
1060
1061    if (args[1] == NULL || args[1][0] != '{' || args[1][1] != '\0' ||
1062          args[2] != NULL) {
1063       fprintf(stderr, tr(505, "Syntax is: define <name> {"));
1064       goto jleave;
1065    }
1066
1067    rv = !_ma_define1(args[0], MA_NONE);
1068 jleave:
1069    NYD_LEAVE;
1070    return rv;
1071 }
1072
1073 FL int
1074 c_undefine(void *v)
1075 {
1076    int rv = 1;
1077    char **args = v;
1078    NYD_ENTER;
1079
1080    if (*args == NULL) {
1081       fprintf(stderr, tr(504, "`%s': required arguments are missing\n"),
1082          "undefine");
1083       goto jleave;
1084    }
1085    do
1086       _ma_undef1(*args, MA_NONE);
1087    while (*++args != NULL);
1088    rv = 0;
1089 jleave:
1090    NYD_LEAVE;
1091    return rv;
1092 }
1093
1094 FL int
1095 c_call(void *v)
1096 {
1097    int rv = 1;
1098    char **args = v;
1099    char const *errs, *name;
1100    struct macro *mp;
1101    NYD_ENTER;
1102
1103    if (args[0] == NULL || (args[1] != NULL && args[2] != NULL)) {
1104       errs = tr(507, "Syntax is: call <%s>\n");
1105       name = "name";
1106       goto jerr;
1107    }
1108
1109    if ((mp = _ma_look(*args, NULL, MA_NONE)) == NULL) {
1110       errs = tr(508, "Undefined macro called: `%s'\n");
1111       name = *args;
1112       goto jerr;
1113    }
1114
1115    rv = _ma_exec(mp, NULL);
1116 jleave:
1117    NYD_LEAVE;
1118    return rv;
1119 jerr:
1120    fprintf(stderr, errs, name);
1121    goto jleave;
1122 }
1123
1124 FL int
1125 callhook(char const *name, int nmail)
1126 {
1127    int len, rv;
1128    struct macro *mp;
1129    char *var, *cp;
1130    NYD_ENTER;
1131
1132    var = ac_alloc(len = strlen(name) + 12 +1);
1133    snprintf(var, len, "folder-hook-%s", name);
1134    if ((cp = vok_vlook(var)) == NULL && (cp = ok_vlook(folder_hook)) == NULL) {
1135       rv = 0;
1136       goto jleave;
1137    }
1138    if ((mp = _ma_look(cp, NULL, MA_NONE)) == NULL) {
1139       fprintf(stderr, tr(49, "Cannot call hook for folder \"%s\": "
1140          "Macro \"%s\" does not exist.\n"), name, cp);
1141       rv = 1;
1142       goto jleave;
1143    }
1144
1145    inhook = nmail ? 3 : 1; /* XXX enum state machine */
1146    rv = _ma_exec(mp, NULL);
1147    inhook = 0;
1148 jleave:
1149    ac_free(var);
1150    NYD_LEAVE;
1151    return rv;
1152 }
1153
1154 FL int
1155 c_account(void *v)
1156 {
1157    char **args = v;
1158    struct macro *mp;
1159    int rv = 1, i, oqf, nqf;
1160    NYD_ENTER;
1161
1162    if (args[0] == NULL) {
1163       rv = _ma_list(MA_ACC);
1164       goto jleave;
1165    }
1166
1167    if (args[1] && args[1][0] == '{' && args[1][1] == '\0') {
1168       if (args[2] != NULL) {
1169          fprintf(stderr, tr(517, "Syntax is: account <name> {\n"));
1170          goto jleave;
1171       }
1172       if (!asccasecmp(args[0], ACCOUNT_NULL)) {
1173          fprintf(stderr, tr(521, "Error: `%s' is a reserved name.\n"),
1174             ACCOUNT_NULL);
1175          goto jleave;
1176       }
1177       rv = !_ma_define1(args[0], MA_ACC);
1178       goto jleave;
1179    }
1180
1181    if (inhook) {
1182       fprintf(stderr, tr(518, "Cannot change account from within a hook.\n"));
1183       goto jleave;
1184    }
1185
1186    save_mbox_for_possible_quitstuff();
1187
1188    mp = NULL;
1189    if (asccasecmp(args[0], ACCOUNT_NULL) != 0 &&
1190          (mp = _ma_look(args[0], NULL, MA_ACC)) == NULL) {
1191       fprintf(stderr, tr(519, "Account `%s' does not exist.\n"), args[0]);
1192       goto jleave;
1193    }
1194
1195    oqf = savequitflags();
1196    if (_acc_curr != NULL && _acc_curr->ma_localopts != NULL)
1197       _localopts_unroll(&_acc_curr->ma_localopts);
1198    account_name = (mp != NULL) ? mp->ma_name : NULL;
1199    _acc_curr = mp;
1200
1201    if (mp != NULL && _ma_exec(mp, &mp->ma_localopts) == CBAD) {
1202       /* XXX account switch incomplete, unroll? */
1203       fprintf(stderr, tr(520, "Switching to account `%s' failed.\n"), args[0]);
1204       goto jleave;
1205    }
1206
1207    if (!starting && !inhook) {
1208       nqf = savequitflags(); /* TODO obsolete (leave -> void -> new box!) */
1209       restorequitflags(oqf);
1210       if ((i = setfile("%", 0)) < 0)
1211          goto jleave;
1212       callhook(mailname, 0);
1213       if (i > 0 && !ok_blook(emptystart))
1214          goto jleave;
1215       announce(ok_blook(bsdcompat) || ok_blook(bsdannounce));
1216       restorequitflags(nqf);
1217    }
1218    rv = 0;
1219 jleave:
1220    NYD_LEAVE;
1221    return rv;
1222 }
1223
1224 FL int
1225 c_unaccount(void *v)
1226 {
1227    int rv = 1;
1228    char **args = v;
1229    NYD_ENTER;
1230
1231    if (*args == NULL) {
1232       fprintf(stderr, tr(504, "`%s': required arguments are missing\n"),
1233          "unaccount");
1234       goto jleave;
1235    }
1236
1237    rv = 0;
1238    do {
1239       if (account_name != NULL && !strcmp(account_name, *args)) {
1240          fprintf(stderr, tr(506,
1241             "Rejecting deletion of currently active account `%s'\n"), *args);
1242          continue;
1243       }
1244       _ma_undef1(*args, MA_ACC);
1245    } while (*++args != NULL);
1246 jleave:
1247    NYD_LEAVE;
1248    return rv;
1249 }
1250
1251 FL int
1252 c_localopts(void *v)
1253 {
1254    int rv = 1;
1255    char **c = v;
1256    NYD_ENTER;
1257
1258    if (_localopts == NULL) {
1259       fprintf(stderr, tr(522,
1260          "Cannot use `localopts' but from within a `define' or `account'\n"));
1261       goto jleave;
1262    }
1263
1264    _localopts->s_unroll = (**c == '0') ? FAL0 : TRU1;
1265    rv = 0;
1266 jleave:
1267    NYD_LEAVE;
1268    return rv;
1269 }
1270
1271 FL void
1272 temporary_localopts_free(void) /* XXX intermediate hack */
1273 {
1274    struct lostack *losp;
1275    NYD_ENTER;
1276
1277    var_clear_allow_undefined = FAL0;
1278    losp = temporary_localopts_store;
1279    temporary_localopts_store = NULL;
1280    _localopts_unroll(&losp->s_localopts);
1281    NYD_LEAVE;
1282 }
1283
1284 /* vim:set fenc=utf-8:s-it-mode */