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       {
 558          struct _n2 {
 559             struct _n2     *up;
 560             struct lostack *lo;
 561          } *x = salloc(sizeof *x); /* FIXME intermediate hack (signal man+) */
 562          x->up = temporary_localopts_store;
 563          x->lo = _localopts;
 564          temporary_localopts_store = x;
 565          rv |= execute(buf, 0, lp->l_length); /* XXX break if != 0 ? */
 566          temporary_localopts_store = x->up;  /* FIXME intermediate hack */
 567       }
 568       var_clear_allow_undefined = FAL0;
 569    }
 570    ac_free(buf);
 571
 572    _localopts = los.s_up;
 573    if (unroller == NULL) {
 574       if (los.s_localopts != NULL)
 575          _localopts_unroll(&los.s_localopts);
 576    } else
 577       *unroller = los.s_localopts;
 578    NYD_LEAVE;
 579    return rv;
 580 }
 581
 582 static int
 583 _ma_list(enum ma_flags mafl)
 584 {
 585    FILE *fp;
 586    char const *typestr;
 587    struct macro *mq;
 588    ui32_t ti, mc;
 589    struct mline *lp;
 590    NYD_ENTER;
 591
 592    if ((fp = Ftmp(NULL, "listmacs", OF_RDWR | OF_UNLINK | OF_REGISTER, 0600)) ==
 593          NULL) {
 594       perror("tmpfile");
 595       mc = 1;
 596       goto jleave;
 597    }
 598
 599    mafl &= MA_TYPE_MASK;
 600    typestr = (mafl & MA_ACC) ? "account" : "define";
 601
 602    for (ti = mc = 0; ti < MA_PRIME; ++ti)
 603       for (mq = _macros[ti]; mq; mq = mq->ma_next)
 604          if ((mq->ma_flags & MA_TYPE_MASK) == mafl) {
 605             if (++mc > 1)
 606                fputc('\n', fp);
 607             fprintf(fp, "%s %s {\n", typestr, mq->ma_name);
 608             for (lp = mq->ma_contents; lp != NULL; lp = lp->l_next)
 609                fprintf(fp, "  %s\n", lp->l_line);
 610             fputs("}\n", fp);
 611          }
 612    if (mc)
 613       page_or_print(fp, 0);
 614
 615    mc = (ui32_t)ferror(fp);
 616    Fclose(fp);
 617 jleave:
 618    NYD_LEAVE;
 619    return (int)mc;
 620 }
 621
 622 static bool_t
 623 _ma_define1(char const *name, enum ma_flags mafl)
 624 {
 625    bool_t rv = FAL0;
 626    struct macro *mp;
 627    struct mline *lp, *lst = NULL, *lnd = NULL;
 628    char *linebuf = NULL, *cp;
 629    size_t linesize = 0, maxlen = 0;
 630    int n, i;
 631    NYD_ENTER;
 632
 633    mp = scalloc(1, sizeof *mp);
 634    mp->ma_name = sstrdup(name);
 635    mp->ma_flags = mafl;
 636
 637    for (;;) {
 638       n = readline_input("", TRU1, &linebuf, &linesize, NULL);
 639       if (n == 0)
 640          continue;
 641       if (n < 0) {
 642          fprintf(stderr, tr(75, "Unterminated %s definition: \"%s\".\n"),
 643             (mafl & MA_ACC ? "account" : "macro"), mp->ma_name);
 644          if (sourcing && !loading)
 645             unstack();
 646          goto jerr;
 647       }
 648       if (_is_closing_angle(linebuf))
 649          break;
 650
 651       /* Trim WS */
 652       for (cp = linebuf, i = 0; i < n; ++cp, ++i)
 653          if (!whitechar(*cp))
 654             break;
 655       if (i == n)
 656          continue;
 657       n -= i;
 658       while (whitechar(cp[n - 1]))
 659          if (--n == 0)
 660             break;
 661       if (n == 0)
 662          continue;
 663
 664       maxlen = MAX(maxlen, (size_t)n);
 665       cp[n++] = '\0';
 666
 667       lp = scalloc(1, sizeof(*lp) - VFIELD_SIZEOF(struct mline, l_line) + n);
 668       memcpy(lp->l_line, cp, n);
 669       lp->l_length = (size_t)--n;
 670       if (lst != NULL) {
 671          lnd->l_next = lp;
 672          lnd = lp;
 673       } else
 674          lst = lnd = lp;
 675    }
 676    mp->ma_contents = lst;
 677    mp->ma_maxlen = maxlen;
 678
 679    if (_ma_look(mp->ma_name, mp, mafl) != NULL) {
 680       fprintf(stderr, tr(76, "A %s named `%s' already exists.\n"),
 681          (mafl & MA_ACC ? "account" : "macro"), mp->ma_name);
 682       lst = mp->ma_contents;
 683       goto jerr;
 684    }
 685
 686    rv = TRU1;
 687 jleave:
 688    if (linebuf != NULL)
 689       free(linebuf);
 690    NYD_LEAVE;
 691    return rv;
 692
 693 jerr:
 694    if (lst != NULL)
 695       _ma_freelines(lst);
 696    free(mp->ma_name);
 697    free(mp);
 698    goto jleave;
 699 }
 700
 701 static void
 702 _ma_undef1(char const *name, enum ma_flags mafl)
 703 {
 704    struct macro *mp;
 705    NYD_ENTER;
 706
 707    if ((mp = _ma_look(name, NULL, mafl | MA_UNDEF)) != NULL) {
 708       _ma_freelines(mp->ma_contents);
 709       free(mp->ma_name);
 710       free(mp);
 711    } else
 712       fprintf(stderr, tr(571, "%s `%s' is not defined\n"),
 713          (mafl & MA_ACC ? "Account" : "Macro"), name);
 714    NYD_LEAVE;
 715 }
 716
 717 static void
 718 _ma_freelines(struct mline *lp)
 719 {
 720    struct mline *lq;
 721    NYD_ENTER;
 722
 723    for (lq = NULL; lp != NULL; ) {
 724       if (lq != NULL)
 725          free(lq);
 726       lq = lp;
 727       lp = lp->l_next;
 728    }
 729    if (lq)
 730       free(lq);
 731    NYD_LEAVE;
 732 }
 733
 734 static void
 735 _localopts_add(struct lostack *losp, char const *name, struct var *ovap)
 736 {
 737    struct var *vap;
 738    size_t nl, vl;
 739    NYD_ENTER;
 740
 741    /* Propagate unrolling up the stack, as necessary */
 742    while (!losp->s_unroll && (losp = losp->s_up) != NULL)
 743       ;
 744    if (losp == NULL)
 745       goto jleave;
 746
 747    /* We've found a level that wants to unroll; check wether it does it yet */
 748    for (vap = losp->s_localopts; vap != NULL; vap = vap->v_link)
 749       if (!strcmp(vap->v_name, name))
 750          goto jleave;
 751
 752    nl = strlen(name) + 1;
 753    vl = (ovap != NULL) ? strlen(ovap->v_value) + 1 : 0;
 754    vap = smalloc(sizeof(*vap) - VFIELD_SIZEOF(struct var, v_name) + nl + vl);
 755    vap->v_link = losp->s_localopts;
 756    losp->s_localopts = vap;
 757    memcpy(vap->v_name, name, nl);
 758    if (vl == 0)
 759       vap->v_value = NULL;
 760    else {
 761       vap->v_value = vap->v_name + nl;
 762       memcpy(vap->v_value, ovap->v_value, vl);
 763    }
 764 jleave:
 765    NYD_LEAVE;
 766 }
 767
 768 static void
 769 _localopts_unroll(struct var **vapp)
 770 {
 771    struct lostack *save_los;
 772    struct var *x, *vap;
 773    NYD_ENTER;
 774
 775    vap = *vapp;
 776    *vapp = NULL;
 777
 778    save_los = _localopts;
 779    _localopts = NULL;
 780    while (vap != NULL) {
 781       x = vap;
 782       vap = vap->v_link;
 783       vok_vset(x->v_name, x->v_value);
 784       free(x);
 785    }
 786    _localopts = save_los;
 787    NYD_LEAVE;
 788 }
 789
 790 FL char *
 791 _var_oklook(enum okeys okey)
 792 {
 793    struct var_carrier vc;
 794    char *rv;
 795    NYD_ENTER;
 796
 797    vc.vc_vmap = _var_map + okey;
 798    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 799    vc.vc_hash = _var_map[okey].vm_hash;
 800    vc.vc_okey = okey;
 801
 802    if (!_var_lookup(&vc)) {
 803       if ((rv = getenv(vc.vc_name)) != NULL) {
 804          _var_set(&vc, rv);
 805          assert(vc.vc_var != NULL);
 806          goto jvar;
 807       }
 808    } else
 809 jvar:
 810       rv = vc.vc_var->v_value;
 811    NYD_LEAVE;
 812    return rv;
 813 }
 814
 815 FL bool_t
 816 _var_okset(enum okeys okey, uintptr_t val)
 817 {
 818    struct var_carrier vc;
 819    bool_t rv;
 820    NYD_ENTER;
 821
 822    vc.vc_vmap = _var_map + okey;
 823    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 824    vc.vc_hash = _var_map[okey].vm_hash;
 825    vc.vc_okey = okey;
 826
 827    rv = _var_set(&vc, (val == 0x1 ? "" : (char const*)val));
 828    NYD_LEAVE;
 829    return rv;
 830 }
 831
 832 FL bool_t
 833 _var_okclear(enum okeys okey)
 834 {
 835    struct var_carrier vc;
 836    bool_t rv;
 837    NYD_ENTER;
 838
 839    vc.vc_vmap = _var_map + okey;
 840    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 841    vc.vc_hash = _var_map[okey].vm_hash;
 842    vc.vc_okey = okey;
 843
 844    rv = _var_clear(&vc);
 845    NYD_LEAVE;
 846    return rv;
 847 }
 848
 849 FL char *
 850 _var_voklook(char const *vokey)
 851 {
 852    struct var_carrier vc;
 853    char *rv;
 854    NYD_ENTER;
 855
 856    _var_revlookup(&vc, vokey);
 857
 858    if (!_var_lookup(&vc)) {
 859       if ((rv = getenv(vc.vc_name)) != NULL) {
 860          _var_set(&vc, rv);
 861          assert(vc.vc_var != NULL);
 862          goto jvar;
 863       }
 864    } else
 865 jvar:
 866       rv = vc.vc_var->v_value;
 867    NYD_LEAVE;
 868    return rv;
 869 }
 870
 871 FL bool_t
 872 _var_vokset(char const *vokey, uintptr_t val)
 873 {
 874    struct var_carrier vc;
 875    bool_t err;
 876    NYD_ENTER;
 877
 878    _var_revlookup(&vc, vokey);
 879
 880    err = _var_set(&vc, (val == 0x1 ? "" : (char const*)val));
 881    NYD_LEAVE;
 882    return err;
 883 }
 884
 885 FL bool_t
 886 _var_vokclear(char const *vokey)
 887 {
 888    struct var_carrier vc;
 889    bool_t err;
 890    NYD_ENTER;
 891
 892    _var_revlookup(&vc, vokey);
 893
 894    err = _var_clear(&vc);
 895    NYD_LEAVE;
 896    return err;
 897 }
 898
 899 FL void
 900 var_list_all(void)
 901 {
 902    FILE *fp;
 903    char **vacp, **cap;
 904    struct var *vp;
 905    size_t no, i;
 906    char const *fmt;
 907    NYD_ENTER;
 908
 909    if ((fp = Ftmp(NULL, "listvars", OF_RDWR | OF_UNLINK | OF_REGISTER, 0600)) ==
 910          NULL) {
 911       perror("tmpfile");
 912       goto jleave;
 913    }
 914
 915    for (no = i = 0; i < MA_PRIME; ++i)
 916       for (vp = _vars[i]; vp != NULL; vp = vp->v_link)
 917          ++no;
 918    vacp = salloc(no * sizeof(*vacp));
 919    for (cap = vacp, i = 0; i < MA_PRIME; ++i)
 920       for (vp = _vars[i]; vp != NULL; vp = vp->v_link)
 921          *cap++ = vp->v_name;
 922
 923    if (no > 1)
 924       qsort(vacp, no, sizeof *vacp, &_var_list_all_cmp);
 925
 926    i = (ok_blook(bsdcompat) || ok_blook(bsdset));
 927    fmt = (i != 0) ? "%s\t%s\n" : "%s=\"%s\"\n";
 928
 929    for (cap = vacp; no != 0; ++cap, --no) {
 930       char *cp = vok_vlook(*cap); /* XXX when lookup checks val/bin, change */
 931       if (cp == NULL)
 932          cp = UNCONST("");
 933       if (i || *cp != '\0')
 934          fprintf(fp, fmt, *cap, cp);
 935       else
 936          fprintf(fp, "%s\n", *cap);
 937    }
 938
 939    page_or_print(fp, PTR2SIZE(cap - vacp));
 940    Fclose(fp);
 941 jleave:
 942    NYD_LEAVE;
 943 }
 944
 945 FL int
 946 c_varshow(void *v)
 947 {
 948    struct var_carrier vc;
 949    char **argv = v, *val;
 950    bool_t isenv, isset;
 951    NYD_ENTER;
 952
 953    if (*argv == NULL) {
 954       v = NULL;
 955       goto jleave;
 956    }
 957
 958    for (; *argv != NULL; ++argv) {
 959       memset(&vc, 0, sizeof vc);
 960       _var_revlookup(&vc, *argv);
 961       if (_var_lookup(&vc)) {
 962          val = vc.vc_var->v_value;
 963          isenv = FAL0;
 964       } else
 965          isenv = ((val = getenv(vc.vc_name)) != NULL);
 966       if (val == NULL)
 967          val = UNCONST("NULL");
 968       isset = (vc.vc_var != NULL);
 969
 970       if (vc.vc_vmap != NULL) {
 971          if (vc.vc_vmap->vm_binary)
 972             printf("%s: binary option (%d): isset=%d/environ=%d\n",
 973                vc.vc_name, vc.vc_okey, isset, isenv);
 974          else
 975             printf("%s: value option (%d): isset=%d/environ=%d value<%s>\n",
 976                vc.vc_name, vc.vc_okey, isset, isenv, val);
 977       } else
 978          printf("%s: isset=%d/environ=%d value<%s>\n",
 979             vc.vc_name, isset, isenv, val);
 980    }
 981 jleave:
 982    NYD_LEAVE;
 983    return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
 984 }
 985
 986 FL int
 987 c_set(void *v)
 988 {
 989    char **ap = v;
 990    int err;
 991    NYD_ENTER;
 992
 993    if (*ap == NULL) {
 994       var_list_all();
 995       err = 0;
 996    } else
 997       err = _var_set_env(ap, FAL0);
 998    NYD_LEAVE;
 999    return err;
1000 }
1001
1002 FL int
1003 c_setenv(void *v)
1004 {
1005    char **ap = v;
1006    int err;
1007    NYD_ENTER;
1008
1009    if (!(err = starting))
1010       err = _var_set_env(ap, TRU1);
1011    NYD_LEAVE;
1012    return err;
1013 }
1014
1015 FL int
1016 c_unset(void *v)
1017 {
1018    char **ap = v;
1019    int err = 0;
1020    NYD_ENTER;
1021
1022    while (*ap != NULL)
1023       err |= _var_vokclear(*ap++);
1024    NYD_LEAVE;
1025    return err;
1026 }
1027
1028 FL int
1029 c_unsetenv(void *v)
1030 {
1031    int err;
1032    NYD_ENTER;
1033
1034    if (!(err = starting)) {
1035       char **ap;
1036       bool_t tmp = var_clear_allow_undefined;
1037       var_clear_allow_undefined = TRU1;
1038       for (ap = v; *ap != NULL; ++ap) {
1039          bool_t bad = _var_vokclear(*ap);
1040          if (
1041 #ifdef HAVE_SETENV
1042                unsetenv(*ap) != 0 &&
1043 #endif
1044                bad
1045          )
1046             err = 1;
1047       }
1048       var_clear_allow_undefined = tmp;
1049    }
1050    NYD_LEAVE;
1051    return err;
1052 }
1053
1054 FL int
1055 c_define(void *v)
1056 {
1057    int rv = 1;
1058    char **args = v;
1059    NYD_ENTER;
1060
1061    if (args[0] == NULL) {
1062       rv = _ma_list(MA_NONE);
1063       goto jleave;
1064    }
1065
1066    if (args[1] == NULL || args[1][0] != '{' || args[1][1] != '\0' ||
1067          args[2] != NULL) {
1068       fprintf(stderr, tr(505, "Syntax is: define <name> {"));
1069       goto jleave;
1070    }
1071
1072    rv = !_ma_define1(args[0], MA_NONE);
1073 jleave:
1074    NYD_LEAVE;
1075    return rv;
1076 }
1077
1078 FL int
1079 c_undefine(void *v)
1080 {
1081    int rv = 1;
1082    char **args = v;
1083    NYD_ENTER;
1084
1085    if (*args == NULL) {
1086       fprintf(stderr, tr(504, "`%s': required arguments are missing\n"),
1087          "undefine");
1088       goto jleave;
1089    }
1090    do
1091       _ma_undef1(*args, MA_NONE);
1092    while (*++args != NULL);
1093    rv = 0;
1094 jleave:
1095    NYD_LEAVE;
1096    return rv;
1097 }
1098
1099 FL int
1100 c_call(void *v)
1101 {
1102    int rv = 1;
1103    char **args = v;
1104    char const *errs, *name;
1105    struct macro *mp;
1106    NYD_ENTER;
1107
1108    if (args[0] == NULL || (args[1] != NULL && args[2] != NULL)) {
1109       errs = tr(507, "Syntax is: call <%s>\n");
1110       name = "name";
1111       goto jerr;
1112    }
1113
1114    if ((mp = _ma_look(*args, NULL, MA_NONE)) == NULL) {
1115       errs = tr(508, "Undefined macro called: `%s'\n");
1116       name = *args;
1117       goto jerr;
1118    }
1119
1120    rv = _ma_exec(mp, NULL);
1121 jleave:
1122    NYD_LEAVE;
1123    return rv;
1124 jerr:
1125    fprintf(stderr, errs, name);
1126    goto jleave;
1127 }
1128
1129 FL int
1130 callhook(char const *name, int nmail)
1131 {
1132    int len, rv;
1133    struct macro *mp;
1134    char *var, *cp;
1135    NYD_ENTER;
1136
1137    var = ac_alloc(len = strlen(name) + 12 +1);
1138    snprintf(var, len, "folder-hook-%s", name);
1139    if ((cp = vok_vlook(var)) == NULL && (cp = ok_vlook(folder_hook)) == NULL) {
1140       rv = 0;
1141       goto jleave;
1142    }
1143    if ((mp = _ma_look(cp, NULL, MA_NONE)) == NULL) {
1144       fprintf(stderr, tr(49, "Cannot call hook for folder \"%s\": "
1145          "Macro \"%s\" does not exist.\n"), name, cp);
1146       rv = 1;
1147       goto jleave;
1148    }
1149
1150    inhook = nmail ? 3 : 1; /* XXX enum state machine */
1151    rv = _ma_exec(mp, NULL);
1152    inhook = 0;
1153 jleave:
1154    ac_free(var);
1155    NYD_LEAVE;
1156    return rv;
1157 }
1158
1159 FL int
1160 c_account(void *v)
1161 {
1162    char **args = v;
1163    struct macro *mp;
1164    int rv = 1, i, oqf, nqf;
1165    NYD_ENTER;
1166
1167    if (args[0] == NULL) {
1168       rv = _ma_list(MA_ACC);
1169       goto jleave;
1170    }
1171
1172    if (args[1] && args[1][0] == '{' && args[1][1] == '\0') {
1173       if (args[2] != NULL) {
1174          fprintf(stderr, tr(517, "Syntax is: account <name> {\n"));
1175          goto jleave;
1176       }
1177       if (!asccasecmp(args[0], ACCOUNT_NULL)) {
1178          fprintf(stderr, tr(521, "Error: `%s' is a reserved name.\n"),
1179             ACCOUNT_NULL);
1180          goto jleave;
1181       }
1182       rv = !_ma_define1(args[0], MA_ACC);
1183       goto jleave;
1184    }
1185
1186    if (inhook) {
1187       fprintf(stderr, tr(518, "Cannot change account from within a hook.\n"));
1188       goto jleave;
1189    }
1190
1191    save_mbox_for_possible_quitstuff();
1192
1193    mp = NULL;
1194    if (asccasecmp(args[0], ACCOUNT_NULL) != 0 &&
1195          (mp = _ma_look(args[0], NULL, MA_ACC)) == NULL) {
1196       fprintf(stderr, tr(519, "Account `%s' does not exist.\n"), args[0]);
1197       goto jleave;
1198    }
1199
1200    oqf = savequitflags();
1201    if (_acc_curr != NULL && _acc_curr->ma_localopts != NULL)
1202       _localopts_unroll(&_acc_curr->ma_localopts);
1203    account_name = (mp != NULL) ? mp->ma_name : NULL;
1204    _acc_curr = mp;
1205
1206    if (mp != NULL && _ma_exec(mp, &mp->ma_localopts) == CBAD) {
1207       /* XXX account switch incomplete, unroll? */
1208       fprintf(stderr, tr(520, "Switching to account `%s' failed.\n"), args[0]);
1209       goto jleave;
1210    }
1211
1212    if (!starting && !inhook) {
1213       nqf = savequitflags(); /* TODO obsolete (leave -> void -> new box!) */
1214       restorequitflags(oqf);
1215       if ((i = setfile("%", 0)) < 0)
1216          goto jleave;
1217       callhook(mailname, 0);
1218       if (i > 0 && !ok_blook(emptystart))
1219          goto jleave;
1220       announce(ok_blook(bsdcompat) || ok_blook(bsdannounce));
1221       restorequitflags(nqf);
1222    }
1223    rv = 0;
1224 jleave:
1225    NYD_LEAVE;
1226    return rv;
1227 }
1228
1229 FL int
1230 c_unaccount(void *v)
1231 {
1232    int rv = 1;
1233    char **args = v;
1234    NYD_ENTER;
1235
1236    if (*args == NULL) {
1237       fprintf(stderr, tr(504, "`%s': required arguments are missing\n"),
1238          "unaccount");
1239       goto jleave;
1240    }
1241
1242    rv = 0;
1243    do {
1244       if (account_name != NULL && !strcmp(account_name, *args)) {
1245          fprintf(stderr, tr(506,
1246             "Rejecting deletion of currently active account `%s'\n"), *args);
1247          continue;
1248       }
1249       _ma_undef1(*args, MA_ACC);
1250    } while (*++args != NULL);
1251 jleave:
1252    NYD_LEAVE;
1253    return rv;
1254 }
1255
1256 FL int
1257 c_localopts(void *v)
1258 {
1259    int rv = 1;
1260    char **c = v;
1261    NYD_ENTER;
1262
1263    if (_localopts == NULL) {
1264       fprintf(stderr, tr(522,
1265          "Cannot use `localopts' but from within a `define' or `account'\n"));
1266       goto jleave;
1267    }
1268
1269    _localopts->s_unroll = (**c == '0') ? FAL0 : TRU1;
1270    rv = 0;
1271 jleave:
1272    NYD_LEAVE;
1273    return rv;
1274 }
1275
1276 FL void
1277 temporary_localopts_free(void) /* XXX intermediate hack */
1278 {
1279    struct _n2 {
1280       struct _n2     *up;
1281       struct lostack *lo;
1282    } *x;
1283    NYD_ENTER;
1284
1285    var_clear_allow_undefined = FAL0;
1286    x = temporary_localopts_store;
1287    temporary_localopts_store = NULL;
1288    _localopts = NULL;
1289
1290    while (x != NULL) {
1291       struct lostack *losp = x->lo;
1292       x = x->up;
1293       _localopts_unroll(&losp->s_localopts);
1294    }
1295    NYD_LEAVE;
1296 }
1297
1298 /* vim:set fenc=utf-8:s-it-mode */