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 macro  *_macros[MA_PRIME];  /* TODO dynamically spaced */
 117 static struct var    *_vars[MA_PRIME];    /* TODO dynamically spaced */
 118
 119 /* Special cased value string allocation */
 120 static char *        _vcopy(char const *str);
 121 static void          _vfree(char *cp);
 122
 123 /* Check for special housekeeping. */
 124 static bool_t        _check_special_vars(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 *  _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).
 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) */
 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 static bool_t        _var_clear(struct var_carrier *vcp);
 148
 149 /* Does cp consist solely of WS and a } */
 150 static bool_t        _is_closing_angle(char const *cp);
 151
 152 /* Lookup for macros/accounts */
 153 static struct macro *_malook(char const *name, struct macro *data,
 154                         enum ma_flags mafl);
 155
 156 /* Walk all lines of a macro and execute() them */
 157 static int           _maexec(struct macro const *mp, struct var **unroller);
 158
 159 /* User display helpers */
 160 static int           _list_macros(enum ma_flags mafl);
 161
 162 /* */
 163 static bool_t        _define1(char const *name, enum ma_flags mafl);
 164 static void          _undef1(char const *name, enum ma_flags mafl);
 165 static void          _freelines(struct mline *lp);
 166
 167 /* var_list_all(): qsort(3) helper */
 168 static int           _var_list_all_cmp(void const *s1, void const *s2);
 169
 170 /* Update replay-log */
 171 static void          _localopts_add(struct lostack *losp, char const *name,
 172                         struct var *ovap);
 173 static void          _localopts_unroll(struct var **vapp);
 174
 175 static char *
 176 _vcopy(char const *str)
 177 {
 178    char *news;
 179    size_t len;
 180    NYD_ENTER;
 181
 182    if (*str == '\0')
 183       news = UNCONST("");
 184    else {
 185       len = strlen(str) +1;
 186       news = smalloc(len);
 187       memcpy(news, str, len);
 188    }
 189    NYD_LEAVE;
 190    return news;
 191 }
 192
 193 static void
 194 _vfree(char *cp)
 195 {
 196    NYD_ENTER;
 197    if (*cp != '\0')
 198       free(cp);
 199    NYD_LEAVE;
 200 }
 201
 202 static bool_t
 203 _check_special_vars(enum okeys okey, bool_t enable, char **val)
 204 {
 205    char *cp = NULL;
 206    bool_t rv = TRU1;
 207    int flag = 0;
 208    NYD_ENTER;
 209
 210    switch (okey) {
 211    case ok_b_debug:
 212       flag = OPT_DEBUG;
 213       break;
 214    case ok_b_header:
 215       flag = OPT_N_FLAG;
 216       enable = !enable;
 217       break;
 218    case ok_b_skipemptybody:
 219       flag = OPT_E_FLAG;
 220       break;
 221    case ok_b_verbose:
 222       flag = OPT_VERBOSE;
 223       break;
 224    case ok_v_folder:
 225       rv = (val == NULL || var_folder_updated(*val, &cp));
 226       if (rv && cp != NULL) {
 227          _vfree(*val);
 228          /* It's smalloc()ed, but ensure we don't leak */
 229          if (*cp == '\0') {
 230             *val = UNCONST("");
 231             free(cp);
 232          } else
 233             *val = cp;
 234       }
 235       break;
 236 #ifdef HAVE_NCL
 237    case ok_v_line_editor_cursor_right:
 238       if ((rv = (val != NULL && *val != NULL))) {
 239          /* Set with no value? TODO very guly */
 240          if (*(cp = *val) != '\0') {
 241             char const *x = cp;
 242             int c;
 243             do {
 244                c = expand_shell_escape(&x, FAL0);
 245                if (c < 0)
 246                   break;
 247                *cp++ = (char)c;
 248             } while (*x != '\0');
 249             *cp = '\0';
 250          }
 251       }
 252       break;
 253 #endif
 254    default:
 255       break;
 256    }
 257
 258    if (flag) {
 259       if (enable)
 260          options |= flag;
 261       else
 262          options &= ~flag;
 263    }
 264    NYD_LEAVE;
 265    return rv;
 266 }
 267
 268 static char const *
 269 _canonify(char const *vn)
 270 {
 271    NYD_ENTER;
 272    if (!upperchar(*vn)) {
 273       char const *vp;
 274
 275       for (vp = vn; *vp != '\0' && *vp != '@'; ++vp)
 276          ;
 277       vn = (*vp == '@') ? i_strdup(vn) : vn;
 278    }
 279    NYD_LEAVE;
 280    return vn;
 281 }
 282
 283 static bool_t
 284 _var_revlookup(struct var_carrier *vcp, char const *name)
 285 {
 286    ui32_t hash, i, j;
 287    struct var_map const *vmp;
 288    NYD_ENTER;
 289
 290    vcp->vc_name = name = _canonify(name);
 291    vcp->vc_hash = hash = MA_NAME2HASH(name);
 292
 293    for (i = hash % _VAR_REV_PRIME, j = 0; j <= _VAR_REV_LONGEST; ++j) {
 294       ui32_t x = _var_revmap[i];
 295       if (x == _VAR_REV_ILL)
 296          break;
 297       vmp = _var_map + x;
 298       if (vmp->vm_hash == hash && !strcmp(_var_keydat + vmp->vm_keyoff, name)) {
 299          vcp->vc_vmap = vmp;
 300          vcp->vc_okey = (enum okeys)x;
 301          goto jleave;
 302       }
 303       if (++i == _VAR_REV_PRIME) {
 304 #ifdef _VAR_REV_WRAPAROUND
 305          i = 0;
 306 #else
 307          break;
 308 #endif
 309       }
 310    }
 311    vcp->vc_vmap = NULL;
 312    vcp = NULL;
 313 jleave:
 314    NYD_LEAVE;
 315    return (vcp != NULL);
 316 }
 317
 318 static bool_t
 319 _var_lookup(struct var_carrier *vcp)
 320 {
 321    struct var **vap, *lvp, *vp;
 322    NYD_ENTER;
 323
 324    vap = _vars + (vcp->vc_prime = MA_HASH2PRIME(vcp->vc_hash));
 325
 326    for (lvp = NULL, vp = *vap; vp != NULL; lvp = vp, vp = vp->v_link)
 327       if (!strcmp(vp->v_name, vcp->vc_name)) {
 328          /* Relink as head, hope it "sorts on usage" over time.
 329           * _var_clear() relies on this behaviour */
 330          if (lvp != NULL) {
 331             lvp->v_link = vp->v_link;
 332             vp->v_link = *vap;
 333             *vap = vp;
 334          }
 335          goto jleave;
 336       }
 337    vp = NULL;
 338 jleave:
 339    vcp->vc_var = vp;
 340    NYD_LEAVE;
 341    return (vp != NULL);
 342 }
 343
 344 static bool_t
 345 _var_set(struct var_carrier *vcp, char const *value)
 346 {
 347    bool_t err;
 348    struct var *vp;
 349    char *oval;
 350    NYD_ENTER;
 351
 352    if (value == NULL) {
 353       bool_t tmp = var_clear_allow_undefined;
 354       var_clear_allow_undefined = TRU1;
 355       err = _var_clear(vcp);
 356       var_clear_allow_undefined = tmp;
 357       goto jleave;
 358    }
 359
 360    _var_lookup(vcp);
 361
 362    /* Don't care what happens later on, store this in the unroll list */
 363    if (_localopts != NULL)
 364       _localopts_add(_localopts, vcp->vc_name, vcp->vc_var);
 365
 366    if ((vp = vcp->vc_var) == NULL) {
 367       size_t l = strlen(vcp->vc_name) + 1;
 368
 369       vcp->vc_var =
 370       vp = smalloc(sizeof(*vp) - VFIELD_SIZEOF(struct var, v_name) + l);
 371       vp->v_link = _vars[vcp->vc_prime];
 372       _vars[vcp->vc_prime] = vp;
 373       memcpy(vp->v_name, vcp->vc_name, l);
 374       oval = UNCONST("");
 375    } else
 376       oval = vp->v_value;
 377    vp->v_value = _vcopy(value);
 378
 379    /* Check if update allowed XXX wasteful on error! */
 380    if (vcp->vc_vmap != NULL && vcp->vc_vmap->vm_special &&
 381          (err = !_check_special_vars(vcp->vc_okey, TRU1, &vp->v_value))) {
 382       char *cp = vp->v_value;
 383       vp->v_value = oval;
 384       oval = cp;
 385    }
 386    if (*oval != '\0')
 387       _vfree(oval);
 388    err = FAL0;
 389 jleave:
 390    NYD_LEAVE;
 391    return err;
 392 }
 393
 394 static bool_t
 395 _var_clear(struct var_carrier *vcp)
 396 {
 397    bool_t err = TRU1;
 398    NYD_ENTER;
 399
 400    if (!_var_lookup(vcp)) {
 401       if (!sourcing && !var_clear_allow_undefined) {
 402          fprintf(stderr, tr(203, "\"%s\": undefined variable\n"), vcp->vc_name);
 403          goto jleave;
 404       }
 405    } else {
 406       if (_localopts != NULL)
 407          _localopts_add(_localopts, vcp->vc_name, vcp->vc_var);
 408
 409       /* Always listhead after _var_lookup() */
 410       _vars[vcp->vc_prime] = _vars[vcp->vc_prime]->v_link;
 411       _vfree(vcp->vc_var->v_value);
 412       free(vcp->vc_var);
 413       vcp->vc_var = NULL;
 414
 415       if (vcp->vc_vmap != NULL && vcp->vc_vmap->vm_special &&
 416             !_check_special_vars(vcp->vc_okey, FAL0, NULL))
 417          goto jleave;
 418    }
 419    err = FAL0;
 420 jleave:
 421    NYD_LEAVE;
 422    return err;
 423 }
 424
 425 static bool_t
 426 _is_closing_angle(char const *cp)
 427 {
 428    bool_t rv = FAL0;
 429    NYD_ENTER;
 430
 431    while (spacechar(*cp))
 432       ++cp;
 433    if (*cp++ != '}')
 434       goto jleave;
 435    while (spacechar(*cp))
 436       ++cp;
 437    rv = (*cp == '\0');
 438 jleave:
 439    NYD_LEAVE;
 440    return rv;
 441 }
 442
 443 static struct macro *
 444 _malook(char const *name, struct macro *data, enum ma_flags mafl)
 445 {
 446    enum ma_flags save_mafl;
 447    ui32_t h;
 448    struct macro *lmp, *mp;
 449    NYD_ENTER;
 450
 451    save_mafl = mafl;
 452    mafl &= MA_TYPE_MASK;
 453    h = MA_NAME2HASH(name);
 454    h = MA_HASH2PRIME(h);
 455
 456    for (lmp = NULL, mp = _macros[h]; mp != NULL; lmp = mp, mp = mp->ma_next) {
 457       if ((mp->ma_flags & MA_TYPE_MASK) == mafl && !strcmp(mp->ma_name, name)) {
 458          if (save_mafl & MA_UNDEF) {
 459             if (lmp == NULL)
 460                _macros[h] = mp->ma_next;
 461             else
 462                lmp->ma_next = mp->ma_next;
 463          }
 464          goto jleave;
 465       }
 466    }
 467
 468    if (data != NULL) {
 469       data->ma_next = _macros[h];
 470       _macros[h] = data;
 471       mp = NULL;
 472    }
 473 jleave:
 474    NYD_LEAVE;
 475    return mp;
 476 }
 477
 478 static int
 479 _maexec(struct macro const *mp, struct var **unroller)
 480 {
 481    struct lostack los;
 482    int rv = 0;
 483    char *buf;
 484    struct mline const *lp;
 485    NYD_ENTER;
 486
 487    los.s_up = _localopts;
 488    los.s_mac = UNCONST(mp);
 489    los.s_localopts = NULL;
 490    los.s_unroll = FAL0;
 491    _localopts = &los;
 492
 493    buf = ac_alloc(mp->ma_maxlen +1);
 494    for (lp = mp->ma_contents; lp; lp = lp->l_next) {
 495       var_clear_allow_undefined = TRU1;
 496       memcpy(buf, lp->l_line, lp->l_length +1);
 497       rv |= execute(buf, 0, lp->l_length); /* XXX break if != 0 ? */
 498       var_clear_allow_undefined = FAL0;
 499    }
 500    ac_free(buf);
 501
 502    _localopts = los.s_up;
 503    if (unroller == NULL)
 504       _localopts_unroll(&los.s_localopts);
 505    else
 506       *unroller = los.s_localopts;
 507    NYD_LEAVE;
 508    return rv;
 509 }
 510
 511 static int
 512 _list_macros(enum ma_flags mafl)
 513 {
 514    FILE *fp;
 515    char const *typestr;
 516    struct macro *mq;
 517    ui32_t ti, mc;
 518    struct mline *lp;
 519    NYD_ENTER;
 520
 521    if ((fp = Ftmp(NULL, "listmacs", OF_RDWR | OF_UNLINK | OF_REGISTER, 0600)) ==
 522          NULL) {
 523       perror("tmpfile");
 524       mc = 1;
 525       goto jleave;
 526    }
 527
 528    mafl &= MA_TYPE_MASK;
 529    typestr = (mafl & MA_ACC) ? "account" : "define";
 530
 531    for (ti = mc = 0; ti < MA_PRIME; ++ti)
 532       for (mq = _macros[ti]; mq; mq = mq->ma_next)
 533          if ((mq->ma_flags & MA_TYPE_MASK) == mafl) {
 534             if (++mc > 1)
 535                fputc('\n', fp);
 536             fprintf(fp, "%s %s {\n", typestr, mq->ma_name);
 537             for (lp = mq->ma_contents; lp != NULL; lp = lp->l_next)
 538                fprintf(fp, "  %s\n", lp->l_line);
 539             fputs("}\n", fp);
 540          }
 541    if (mc)
 542       page_or_print(fp, 0);
 543
 544    mc = (ui32_t)ferror(fp);
 545    Fclose(fp);
 546 jleave:
 547    NYD_LEAVE;
 548    return (int)mc;
 549 }
 550
 551 static bool_t
 552 _define1(char const *name, enum ma_flags mafl)
 553 {
 554    bool_t rv = FAL0;
 555    struct macro *mp;
 556    struct mline *lp, *lst = NULL, *lnd = NULL;
 557    char *linebuf = NULL, *cp;
 558    size_t linesize = 0, maxlen = 0;
 559    int n, i;
 560    NYD_ENTER;
 561
 562    mp = scalloc(1, sizeof *mp);
 563    mp->ma_name = sstrdup(name);
 564    mp->ma_flags = mafl;
 565
 566    for (;;) {
 567       n = readline_input("", TRU1, &linebuf, &linesize, NULL);
 568       if (n <= 0) {
 569          fprintf(stderr, tr(75, "Unterminated %s definition: \"%s\".\n"),
 570             (mafl & MA_ACC ? "account" : "macro"), mp->ma_name);
 571          if (sourcing)
 572             unstack();
 573          goto jerr;
 574       }
 575       if (_is_closing_angle(linebuf))
 576          break;
 577
 578       /* Trim WS */
 579       for (cp = linebuf, i = 0; i < n; ++cp, ++i)
 580          if (!whitechar(*cp))
 581             break;
 582       if (i == n)
 583          continue;
 584       n -= i;
 585       while (whitechar(cp[n - 1]))
 586          if (--n == 0)
 587             break;
 588       if (n == 0)
 589          continue;
 590
 591       maxlen = MAX(maxlen, (size_t)n);
 592       cp[n++] = '\0';
 593
 594       lp = scalloc(1, sizeof(*lp) - VFIELD_SIZEOF(struct mline, l_line) + n);
 595       memcpy(lp->l_line, cp, n);
 596       lp->l_length = (size_t)--n;
 597       if (lst != NULL) {
 598          lnd->l_next = lp;
 599          lnd = lp;
 600       } else
 601          lst = lnd = lp;
 602    }
 603    mp->ma_contents = lst;
 604    mp->ma_maxlen = maxlen;
 605
 606    if (_malook(mp->ma_name, mp, mafl) != NULL) {
 607       if (!(mafl & MA_ACC)) {
 608          fprintf(stderr, tr(76, "A macro named \"%s\" already exists.\n"),
 609             mp->ma_name);
 610          lst = mp->ma_contents;
 611          goto jerr;
 612       }
 613       _undef1(mp->ma_name, MA_ACC);
 614       _malook(mp->ma_name, mp, MA_ACC);
 615    }
 616
 617    rv = TRU1;
 618 jleave:
 619    if (linebuf != NULL)
 620       free(linebuf);
 621    NYD_LEAVE;
 622    return rv;
 623
 624 jerr:
 625    if (lst != NULL)
 626       _freelines(lst);
 627    free(mp->ma_name);
 628    free(mp);
 629    goto jleave;
 630 }
 631
 632 static void
 633 _undef1(char const *name, enum ma_flags mafl)
 634 {
 635    struct macro *mp;
 636    NYD_ENTER;
 637
 638    if ((mp = _malook(name, NULL, mafl | MA_UNDEF)) != NULL) {
 639       _freelines(mp->ma_contents);
 640       free(mp->ma_name);
 641       free(mp);
 642    }
 643    NYD_LEAVE;
 644 }
 645
 646 static void
 647 _freelines(struct mline *lp)
 648 {
 649    struct mline *lq;
 650    NYD_ENTER;
 651
 652    for (lq = NULL; lp != NULL; ) {
 653       if (lq != NULL)
 654          free(lq);
 655       lq = lp;
 656       lp = lp->l_next;
 657    }
 658    if (lq)
 659       free(lq);
 660    NYD_LEAVE;
 661 }
 662
 663 static int
 664 _var_list_all_cmp(void const *s1, void const *s2)
 665 {
 666    int rv;
 667    NYD_ENTER;
 668
 669    rv = strcmp(*(char**)UNCONST(s1), *(char**)UNCONST(s2));
 670    NYD_LEAVE;
 671    return rv;
 672 }
 673
 674 static void
 675 _localopts_add(struct lostack *losp, char const *name, struct var *ovap)
 676 {
 677    struct var *vap;
 678    size_t nl, vl;
 679    NYD_ENTER;
 680
 681    /* Propagate unrolling up the stack, as necessary */
 682    while (!losp->s_unroll && (losp = losp->s_up) != NULL)
 683       ;
 684    if (losp == NULL)
 685       goto jleave;
 686
 687    /* We've found a level that wants to unroll; check wether it does it yet */
 688    for (vap = losp->s_localopts; vap != NULL; vap = vap->v_link)
 689       if (!strcmp(vap->v_name, name))
 690          goto jleave;
 691
 692    nl = strlen(name) + 1;
 693    vl = (ovap != NULL) ? strlen(ovap->v_value) + 1 : 0;
 694    vap = smalloc(sizeof(*vap) - VFIELD_SIZEOF(struct var, v_name) + nl + vl);
 695    vap->v_link = losp->s_localopts;
 696    losp->s_localopts = vap;
 697    memcpy(vap->v_name, name, nl);
 698    if (vl == 0)
 699       vap->v_value = NULL;
 700    else {
 701       vap->v_value = vap->v_name + nl;
 702       memcpy(vap->v_value, ovap->v_value, vl);
 703    }
 704 jleave:
 705    NYD_LEAVE;
 706 }
 707
 708 static void
 709 _localopts_unroll(struct var **vapp)
 710 {
 711    struct lostack *save_los;
 712    struct var *x, *vap;
 713    NYD_ENTER;
 714
 715    vap = *vapp;
 716    *vapp = NULL;
 717
 718    save_los = _localopts;
 719    _localopts = NULL;
 720    while (vap != NULL) {
 721       x = vap;
 722       vap = vap->v_link;
 723       vok_vset(x->v_name, x->v_value);
 724       free(x);
 725    }
 726    _localopts = save_los;
 727    NYD_LEAVE;
 728 }
 729
 730 FL char *
 731 _var_oklook(enum okeys okey)
 732 {
 733    struct var_carrier vc;
 734    char *rv;
 735    NYD_ENTER;
 736
 737    vc.vc_vmap = _var_map + okey;
 738    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 739    vc.vc_hash = _var_map[okey].vm_hash;
 740    vc.vc_okey = okey;
 741
 742    if (!_var_lookup(&vc)) {
 743       if ((rv = getenv(vc.vc_name)) != NULL) {
 744          _var_set(&vc, rv);
 745          assert(vc.vc_var != NULL);
 746          goto jvar;
 747       }
 748    } else
 749 jvar:
 750       rv = vc.vc_var->v_value;
 751    NYD_LEAVE;
 752    return rv;
 753 }
 754
 755 FL bool_t
 756 _var_okset(enum okeys okey, uintptr_t val)
 757 {
 758    struct var_carrier vc;
 759    bool_t rv;
 760    NYD_ENTER;
 761
 762    vc.vc_vmap = _var_map + okey;
 763    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 764    vc.vc_hash = _var_map[okey].vm_hash;
 765    vc.vc_okey = okey;
 766
 767    rv = _var_set(&vc, (val == 0x1 ? "" : (char const*)val));
 768    NYD_LEAVE;
 769    return rv;
 770 }
 771
 772 FL bool_t
 773 _var_okclear(enum okeys okey)
 774 {
 775    struct var_carrier vc;
 776    bool_t rv;
 777    NYD_ENTER;
 778
 779    vc.vc_vmap = _var_map + okey;
 780    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 781    vc.vc_hash = _var_map[okey].vm_hash;
 782    vc.vc_okey = okey;
 783
 784    rv = _var_clear(&vc);
 785    NYD_LEAVE;
 786    return rv;
 787 }
 788
 789 FL char *
 790 _var_voklook(char const *vokey)
 791 {
 792    struct var_carrier vc;
 793    char *rv;
 794    NYD_ENTER;
 795
 796    _var_revlookup(&vc, vokey);
 797
 798    if (!_var_lookup(&vc)) {
 799       if ((rv = getenv(vc.vc_name)) != NULL) {
 800          _var_set(&vc, rv);
 801          assert(vc.vc_var != NULL);
 802          goto jvar;
 803       }
 804    } else
 805 jvar:
 806       rv = vc.vc_var->v_value;
 807    NYD_LEAVE;
 808    return rv;
 809 }
 810
 811 FL bool_t
 812 _var_vokset(char const *vokey, uintptr_t val)
 813 {
 814    struct var_carrier vc;
 815    bool_t rv;
 816    NYD_ENTER;
 817
 818    _var_revlookup(&vc, vokey);
 819
 820    rv = _var_set(&vc, (val == 0x1 ? "" : (char const*)val));
 821    NYD_LEAVE;
 822    return rv;
 823 }
 824
 825 FL bool_t
 826 _var_vokclear(char const *vokey)
 827 {
 828    struct var_carrier vc;
 829    bool_t rv;
 830    NYD_ENTER;
 831
 832    _var_revlookup(&vc, vokey);
 833
 834    rv = _var_clear(&vc);
 835    NYD_LEAVE;
 836    return rv;
 837 }
 838
 839 FL void
 840 var_list_all(void)
 841 {
 842    FILE *fp;
 843    char **vacp, **cap;
 844    struct var *vp;
 845    size_t no, i;
 846    char const *fmt;
 847    NYD_ENTER;
 848
 849    if ((fp = Ftmp(NULL, "listvars", OF_RDWR | OF_UNLINK | OF_REGISTER, 0600)) ==
 850          NULL) {
 851       perror("tmpfile");
 852       goto jleave;
 853    }
 854
 855    for (no = i = 0; i < MA_PRIME; ++i)
 856       for (vp = _vars[i]; vp != NULL; vp = vp->v_link)
 857          ++no;
 858    vacp = salloc(no * sizeof(*vacp));
 859    for (cap = vacp, i = 0; i < MA_PRIME; ++i)
 860       for (vp = _vars[i]; vp != NULL; vp = vp->v_link)
 861          *cap++ = vp->v_name;
 862
 863    if (no > 1)
 864       qsort(vacp, no, sizeof *vacp, &_var_list_all_cmp);
 865
 866    i = (ok_blook(bsdcompat) || ok_blook(bsdset));
 867    fmt = (i != 0) ? "%s\t%s\n" : "%s=\"%s\"\n";
 868
 869    for (cap = vacp; no != 0; ++cap, --no) {
 870       char *cp = vok_vlook(*cap); /* XXX when lookup checks val/bin, change */
 871       if (cp == NULL)
 872          cp = UNCONST("");
 873       if (i || *cp != '\0')
 874          fprintf(fp, fmt, *cap, cp);
 875       else
 876          fprintf(fp, "%s\n", *cap);
 877    }
 878
 879    page_or_print(fp, PTR2SIZE(cap - vacp));
 880    Fclose(fp);
 881 jleave:
 882    NYD_LEAVE;
 883 }
 884
 885 FL int
 886 c_var_inspect(void *v)
 887 {
 888    struct var_carrier vc;
 889    char **argv = v, *val;
 890    bool_t isenv, isset;
 891    NYD_ENTER;
 892
 893    if (*argv == NULL) {
 894       v = NULL;
 895       goto jleave;
 896    }
 897
 898    for (; *argv != NULL; ++argv) {
 899       memset(&vc, 0, sizeof vc);
 900       _var_revlookup(&vc, *argv);
 901       if (_var_lookup(&vc)) {
 902          val = vc.vc_var->v_value;
 903          isenv = FAL0;
 904       } else
 905          isenv = ((val = getenv(vc.vc_name)) != NULL);
 906       if (val == NULL)
 907          val = UNCONST("NULL");
 908       isset = (vc.vc_var != NULL);
 909
 910       if (vc.vc_vmap != NULL) {
 911          if (vc.vc_vmap->vm_binary)
 912             printf("%s: binary option (%d): isset=%d/environ=%d\n",
 913                vc.vc_name, vc.vc_okey, isset, isenv);
 914          else
 915             printf("%s: value option (%d): isset=%d/environ=%d value<%s>\n",
 916                vc.vc_name, vc.vc_okey, isset, isenv, val);
 917       } else
 918          printf("%s: isset=%d/environ=%d value<%s>\n",
 919             vc.vc_name, isset, isenv, val);
 920    }
 921 jleave:
 922    NYD_LEAVE;
 923    return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
 924 }
 925
 926 FL int
 927 c_define(void *v)
 928 {
 929    int rv = 1;
 930    char **args = v;
 931    char const *errs;
 932    NYD_ENTER;
 933
 934    if (args[0] == NULL) {
 935       errs = tr(504, "Missing macro name to `define'");
 936       goto jerr;
 937    }
 938    if (args[1] == NULL || args[1][0] != '{' || args[1][1] != '\0' ||
 939          args[2] != NULL) {
 940       errs = tr(505, "Syntax is: define <name> {");
 941       goto jerr;
 942    }
 943
 944    rv = !_define1(args[0], MA_NONE);
 945 jleave:
 946    NYD_LEAVE;
 947    return rv;
 948 jerr:
 949    fprintf(stderr, "%s\n", errs);
 950    goto jleave;
 951 }
 952
 953 FL int
 954 c_undef(void *v)
 955 {
 956    int rv = 1;
 957    char **args = v;
 958    NYD_ENTER;
 959
 960    if (*args == NULL) {
 961       fprintf(stderr, tr(506, "Missing macro name to `undef'\n"));
 962       goto jleave;
 963    }
 964    do
 965       _undef1(*args, MA_NONE);
 966    while (*++args != NULL);
 967    rv = 0;
 968 jleave:
 969    NYD_LEAVE;
 970    return rv;
 971 }
 972
 973 FL int
 974 c_call(void *v)
 975 {
 976    int rv = 1;
 977    char **args = v;
 978    char const *errs, *name;
 979    struct macro *mp;
 980    NYD_ENTER;
 981
 982    if (args[0] == NULL || (args[1] != NULL && args[2] != NULL)) {
 983       errs = tr(507, "Syntax is: call <%s>\n");
 984       name = "name";
 985       goto jerr;
 986    }
 987
 988    if ((mp = _malook(*args, NULL, MA_NONE)) == NULL) {
 989       errs = tr(508, "Undefined macro called: \"%s\"\n");
 990       name = *args;
 991       goto jerr;
 992    }
 993
 994    rv = _maexec(mp, NULL);
 995 jleave:
 996    NYD_LEAVE;
 997    return rv;
 998 jerr:
 999    fprintf(stderr, errs, name);
1000    goto jleave;
1001 }
1002
1003 FL int
1004 callhook(char const *name, int nmail)
1005 {
1006    int len, rv;
1007    struct macro *mp;
1008    char *var, *cp;
1009    NYD_ENTER;
1010
1011    var = ac_alloc(len = strlen(name) + 12 +1);
1012    snprintf(var, len, "folder-hook-%s", name);
1013    if ((cp = vok_vlook(var)) == NULL && (cp = ok_vlook(folder_hook)) == NULL) {
1014       rv = 0;
1015       goto jleave;
1016    }
1017    if ((mp = _malook(cp, NULL, MA_NONE)) == NULL) {
1018       fprintf(stderr, tr(49, "Cannot call hook for folder \"%s\": "
1019          "Macro \"%s\" does not exist.\n"), name, cp);
1020       rv = 1;
1021       goto jleave;
1022    }
1023
1024    inhook = nmail ? 3 : 1; /* XXX enum state machine */
1025    rv = _maexec(mp, NULL);
1026    inhook = 0;
1027 jleave:
1028    ac_free(var);
1029    NYD_LEAVE;
1030    return rv;
1031 }
1032
1033 FL int
1034 c_defines(void *v)
1035 {
1036    int rv;
1037    NYD_ENTER;
1038    UNUSED(v);
1039
1040    rv = _list_macros(MA_NONE);
1041    NYD_LEAVE;
1042    return rv;
1043 }
1044
1045 FL int
1046 c_account(void *v)
1047 {
1048    char **args = v;
1049    struct macro *mp;
1050    int rv = 1, i, oqf, nqf;
1051    NYD_ENTER;
1052
1053    if (args[0] == NULL) {
1054       rv = _list_macros(MA_ACC);
1055       goto jleave;
1056    }
1057
1058    if (args[1] && args[1][0] == '{' && args[1][1] == '\0') {
1059       if (args[2] != NULL) {
1060          fprintf(stderr, tr(517, "Syntax is: account <name> {\n"));
1061          goto jleave;
1062       }
1063       if (!asccasecmp(args[0], ACCOUNT_NULL)) {
1064          fprintf(stderr, tr(521, "Error: `%s' is a reserved name.\n"),
1065             ACCOUNT_NULL);
1066          goto jleave;
1067       }
1068       rv = !_define1(args[0], MA_ACC);
1069       goto jleave;
1070    }
1071
1072    if (inhook) {
1073       fprintf(stderr, tr(518, "Cannot change account from within a hook.\n"));
1074       goto jleave;
1075    }
1076
1077    save_mbox_for_possible_quitstuff();
1078
1079    mp = NULL;
1080    if (asccasecmp(args[0], ACCOUNT_NULL) != 0 &&
1081          (mp = _malook(args[0], NULL, MA_ACC)) == NULL) {
1082       fprintf(stderr, tr(519, "Account `%s' does not exist.\n"), args[0]);
1083       goto jleave;
1084    }
1085
1086    oqf = savequitflags();
1087    if (_acc_curr != NULL)
1088       _localopts_unroll(&_acc_curr->ma_localopts);
1089    account_name = (mp != NULL) ? mp->ma_name : NULL;
1090    _acc_curr = mp;
1091
1092    if (mp != NULL && _maexec(mp, &mp->ma_localopts) == CBAD) {
1093       /* XXX account switch incomplete, unroll? */
1094       fprintf(stderr, tr(520, "Switching to account `%s' failed.\n"), args[0]);
1095       goto jleave;
1096    }
1097
1098    if (!starting && !inhook) {
1099       nqf = savequitflags(); /* TODO obsolete (leave -> void -> new box!) */
1100       restorequitflags(oqf);
1101       if ((i = setfile("%", 0)) < 0)
1102          goto jleave;
1103       callhook(mailname, 0);
1104       if (i > 0 && !ok_blook(emptystart))
1105          goto jleave;
1106       announce(ok_blook(bsdcompat) || ok_blook(bsdannounce));
1107       restorequitflags(nqf);
1108    }
1109    rv = 0;
1110 jleave:
1111    NYD_LEAVE;
1112    return rv;
1113 }
1114
1115 FL int
1116 c_localopts(void *v)
1117 {
1118    int rv = 1;
1119    char **c = v;
1120    NYD_ENTER;
1121
1122    if (_localopts == NULL) {
1123       fprintf(stderr, tr(522,
1124          "Cannot use `localopts' but from within a `define' or `account'\n"));
1125       goto jleave;
1126    }
1127
1128    _localopts->s_unroll = (**c == '0') ? FAL0 : TRU1;
1129    rv = 0;
1130 jleave:
1131    NYD_LEAVE;
1132    return rv;
1133 }
1134
1135 /* vim:set fenc=utf-8:s-it-mode */