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  *
 131  * Following the standard, only the part following the last '@' should
 132  * be lower-cased, but practice has established otherwise here */
 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 on "error" */
 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 on "error" */
 141 static bool_t        _var_lookup(struct var_carrier *vcp);
 142
 143 /* Set variable from vcp.vc_(vmap|name|hash); sets vcp.vc_var if NULL */
 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 /* Line *cp* consists 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 &&
 299             !strcmp(_var_keydat + vmp->vm_keyoff, name)) {
 300          vcp->vc_vmap = vmp;
 301          vcp->vc_okey = (enum okeys)x;
 302          goto jleave;
 303       }
 304       if (++i == _VAR_REV_PRIME) {
 305 #ifdef _VAR_REV_WRAPAROUND
 306          i = 0;
 307 #else
 308          break;
 309 #endif
 310       }
 311    }
 312    vcp->vc_vmap = NULL;
 313    vcp = NULL;
 314 jleave:
 315    NYD_LEAVE;
 316    return (vcp != NULL);
 317 }
 318
 319 static bool_t
 320 _var_lookup(struct var_carrier *vcp)
 321 {
 322    struct var **vap, *lvp, *vp;
 323    NYD_ENTER;
 324
 325    vap = _vars + (vcp->vc_prime = MA_HASH2PRIME(vcp->vc_hash));
 326
 327    for (lvp = NULL, vp = *vap; vp != NULL; lvp = vp, vp = vp->v_link)
 328       if (!strcmp(vp->v_name, vcp->vc_name)) {
 329          /* Relink as head, hope it "sorts on usage" over time */
 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"),
 403             vcp->vc_name);
 404          goto jleave;
 405       }
 406    } else {
 407       if (_localopts != NULL)
 408          _localopts_add(_localopts, vcp->vc_name, vcp->vc_var);
 409
 410       /* Always listhead after _var_lookup() */
 411       _vars[vcp->vc_prime] = _vars[vcp->vc_prime]->v_link;
 412       _vfree(vcp->vc_var->v_value);
 413       free(vcp->vc_var);
 414       vcp->vc_var = NULL;
 415
 416       if (vcp->vc_vmap != NULL && vcp->vc_vmap->vm_special &&
 417             !_check_special_vars(vcp->vc_okey, FAL0, NULL))
 418          goto jleave;
 419    }
 420    err = FAL0;
 421 jleave:
 422    NYD_LEAVE;
 423    return err;
 424 }
 425
 426 static bool_t
 427 _is_closing_angle(char const *cp)
 428 {
 429    bool_t rv = FAL0;
 430    NYD_ENTER;
 431
 432    while (spacechar(*cp))
 433       ++cp;
 434    if (*cp++ != '}')
 435       goto jleave;
 436    while (spacechar(*cp))
 437       ++cp;
 438    rv = (*cp == '\0');
 439 jleave:
 440    NYD_LEAVE;
 441    return rv;
 442 }
 443
 444 static struct macro *
 445 _malook(char const *name, struct macro *data, enum ma_flags mafl)
 446 {
 447    enum ma_flags save_mafl;
 448    ui32_t h;
 449    struct macro *lmp, *mp;
 450    NYD_ENTER;
 451
 452    save_mafl = mafl;
 453    mafl &= MA_TYPE_MASK;
 454    h = MA_NAME2HASH(name);
 455    h = MA_HASH2PRIME(h);
 456
 457    for (lmp = NULL, mp = _macros[h]; mp != NULL; lmp = mp, mp = mp->ma_next) {
 458       if ((mp->ma_flags & MA_TYPE_MASK) == mafl &&
 459             !strcmp(mp->ma_name, name)) {
 460          if (save_mafl & MA_UNDEF) {
 461             if (lmp == NULL)
 462                _macros[h] = mp->ma_next;
 463             else
 464                lmp->ma_next = mp->ma_next;
 465          }
 466          goto jleave;
 467       }
 468    }
 469
 470    if (data != NULL) {
 471       data->ma_next = _macros[h];
 472       _macros[h] = data;
 473       mp = NULL;
 474    }
 475 jleave:
 476    NYD_LEAVE;
 477    return mp;
 478 }
 479
 480 static int
 481 _maexec(struct macro const *mp, struct var **unroller)
 482 {
 483    struct lostack los;
 484    int rv = 0;
 485    char *buf;
 486    struct mline const *lp;
 487    NYD_ENTER;
 488
 489    los.s_up = _localopts;
 490    los.s_mac = UNCONST(mp);
 491    los.s_localopts = NULL;
 492    los.s_unroll = FAL0;
 493    _localopts = &los;
 494
 495    buf = ac_alloc(mp->ma_maxlen + 1);
 496    for (lp = mp->ma_contents; lp; lp = lp->l_next) {
 497       var_clear_allow_undefined = TRU1;
 498       memcpy(buf, lp->l_line, lp->l_length + 1);
 499       rv |= execute(buf, 0, lp->l_length); /* XXX break if != 0 ? */
 500       var_clear_allow_undefined = FAL0;
 501    }
 502    ac_free(buf);
 503
 504    _localopts = los.s_up;
 505    if (unroller == NULL)
 506       _localopts_unroll(&los.s_localopts);
 507    else
 508       *unroller = los.s_localopts;
 509    NYD_LEAVE;
 510    return rv;
 511 }
 512
 513 static int
 514 _list_macros(enum ma_flags mafl)
 515 {
 516    FILE *fp;
 517    char const *typestr;
 518    struct macro *mq;
 519    ui32_t ti, mc;
 520    struct mline *lp;
 521    NYD_ENTER;
 522
 523    if ((fp = Ftmp(NULL, "listmacs", OF_RDWR | OF_UNLINK | OF_REGISTER, 0600)) ==
 524          NULL) {
 525       perror("tmpfile");
 526       mc = 1;
 527       goto jleave;
 528    }
 529
 530    mafl &= MA_TYPE_MASK;
 531    typestr = (mafl & MA_ACC) ? "account" : "define";
 532
 533    for (ti = mc = 0; ti < MA_PRIME; ++ti)
 534       for (mq = _macros[ti]; mq; mq = mq->ma_next)
 535          if ((mq->ma_flags & MA_TYPE_MASK) == mafl) {
 536             if (++mc > 1)
 537                fputc('\n', fp);
 538             fprintf(fp, "%s %s {\n", typestr, mq->ma_name);
 539             for (lp = mq->ma_contents; lp; lp = lp->l_next)
 540                fprintf(fp, "  %s\n", lp->l_line);
 541             fputs("}\n", fp);
 542          }
 543    if (mc)
 544       page_or_print(fp, 0);
 545
 546    mc = (ui32_t)ferror(fp);
 547    Fclose(fp);
 548 jleave:
 549    NYD_LEAVE;
 550    return (int)mc;
 551 }
 552
 553 static bool_t
 554 _define1(char const *name, enum ma_flags mafl)
 555 {
 556    bool_t rv = FAL0;
 557    struct macro *mp;
 558    struct mline *lp, *lst = NULL, *lnd = NULL;
 559    char *linebuf = NULL, *cp;
 560    size_t linesize = 0, maxlen = 0;
 561    int n, i;
 562    NYD_ENTER;
 563
 564    mp = scalloc(1, sizeof *mp);
 565    mp->ma_name = sstrdup(name);
 566    mp->ma_flags = mafl;
 567
 568    for (;;) {
 569       n = readline_input("", TRU1, &linebuf, &linesize, NULL);
 570       if (n <= 0) {
 571          fprintf(stderr, tr(75, "Unterminated %s definition: \"%s\".\n"),
 572             (mafl & MA_ACC ? "account" : "macro"), mp->ma_name);
 573          if (sourcing)
 574             unstack();
 575          goto jerr;
 576       }
 577       if (_is_closing_angle(linebuf))
 578          break;
 579
 580       /* Trim WS */
 581       for (cp = linebuf, i = 0; i < n; ++cp, ++i)
 582          if (!whitechar(*cp))
 583             break;
 584       if (i == n)
 585          continue;
 586       n -= i;
 587       while (whitechar(cp[n - 1]))
 588          if (--n == 0)
 589             break;
 590       if (n == 0)
 591          continue;
 592
 593       maxlen = MAX(maxlen, (size_t)n);
 594       cp[n++] = '\0';
 595
 596       lp = scalloc(1, sizeof(*lp) - VFIELD_SIZEOF(struct mline, l_line) + n);
 597       memcpy(lp->l_line, cp, n);
 598       lp->l_length = (size_t)--n;
 599       if (lst != NULL) {
 600          lnd->l_next = lp;
 601          lnd = lp;
 602       } else
 603          lst = lnd = lp;
 604    }
 605    mp->ma_contents = lst;
 606    mp->ma_maxlen = maxlen;
 607
 608    if (_malook(mp->ma_name, mp, mafl) != NULL) {
 609       if (!(mafl & MA_ACC)) {
 610          fprintf(stderr, tr(76, "A macro named \"%s\" already exists.\n"),
 611             mp->ma_name);
 612          lst = mp->ma_contents;
 613          goto jerr;
 614       }
 615       _undef1(mp->ma_name, MA_ACC);
 616       _malook(mp->ma_name, mp, MA_ACC);
 617    }
 618
 619    rv = TRU1;
 620 jleave:
 621    if (linebuf != NULL)
 622       free(linebuf);
 623    NYD_LEAVE;
 624    return rv;
 625
 626 jerr:
 627    if (lst != NULL)
 628       _freelines(lst);
 629    free(mp->ma_name);
 630    free(mp);
 631    goto jleave;
 632 }
 633
 634 static void
 635 _undef1(char const *name, enum ma_flags mafl)
 636 {
 637    struct macro *mp;
 638    NYD_ENTER;
 639
 640    if ((mp = _malook(name, NULL, mafl | MA_UNDEF)) != NULL) {
 641       _freelines(mp->ma_contents);
 642       free(mp->ma_name);
 643       free(mp);
 644    }
 645    NYD_LEAVE;
 646 }
 647
 648 static void
 649 _freelines(struct mline *lp)
 650 {
 651    struct mline *lq;
 652    NYD_ENTER;
 653
 654    for (lq = NULL; lp != NULL; ) {
 655       if (lq != NULL)
 656          free(lq);
 657       lq = lp;
 658       lp = lp->l_next;
 659    }
 660    if (lq)
 661       free(lq);
 662    NYD_LEAVE;
 663 }
 664
 665 static int
 666 _var_list_all_cmp(void const *s1, void const *s2)
 667 {
 668    int rv;
 669    NYD_ENTER;
 670
 671    rv = strcmp(*(char**)UNCONST(s1), *(char**)UNCONST(s2));
 672    NYD_LEAVE;
 673    return rv;
 674 }
 675
 676 static void
 677 _localopts_add(struct lostack *losp, char const *name, struct var *ovap)
 678 {
 679    struct var *vap;
 680    size_t nl, vl;
 681    NYD_ENTER;
 682
 683    /* Propagate unrolling up the stack, as necessary */
 684    while (!losp->s_unroll && (losp = losp->s_up) != NULL)
 685       ;
 686    if (losp == NULL)
 687       goto jleave;
 688
 689    /* We've found a level that wants to unroll; check wether it does it yet */
 690    for (vap = losp->s_localopts; vap != NULL; vap = vap->v_link)
 691       if (!strcmp(vap->v_name, name))
 692          goto jleave;
 693
 694    nl = strlen(name) + 1;
 695    vl = (ovap != NULL) ? strlen(ovap->v_value) + 1 : 0;
 696    vap = smalloc(sizeof(*vap) - VFIELD_SIZEOF(struct var, v_name) + nl + vl);
 697    vap->v_link = losp->s_localopts;
 698    losp->s_localopts = vap;
 699    memcpy(vap->v_name, name, nl);
 700    if (vl == 0)
 701       vap->v_value = NULL;
 702    else {
 703       vap->v_value = vap->v_name + nl;
 704       memcpy(vap->v_value, ovap->v_value, vl);
 705    }
 706 jleave:
 707    NYD_LEAVE;
 708 }
 709
 710 static void
 711 _localopts_unroll(struct var **vapp)
 712 {
 713    struct lostack *save_los;
 714    struct var *x, *vap;
 715    NYD_ENTER;
 716
 717    vap = *vapp;
 718    *vapp = NULL;
 719
 720    save_los = _localopts;
 721    _localopts = NULL;
 722    while (vap != NULL) {
 723       x = vap;
 724       vap = vap->v_link;
 725       vok_vset(x->v_name, x->v_value);
 726       free(x);
 727    }
 728    _localopts = save_los;
 729    NYD_LEAVE;
 730 }
 731
 732 FL char *
 733 _var_oklook(enum okeys okey)
 734 {
 735    struct var_carrier vc;
 736    char *rv;
 737    NYD_ENTER;
 738
 739    vc.vc_vmap = _var_map + okey;
 740    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 741    vc.vc_hash = _var_map[okey].vm_hash;
 742    vc.vc_okey = okey;
 743
 744    if (!_var_lookup(&vc)) {
 745       if ((rv = getenv(vc.vc_name)) != NULL) {
 746          _var_set(&vc, rv);
 747          assert(vc.vc_var != NULL);
 748          goto jvar;
 749       }
 750    } else
 751 jvar:
 752       rv = vc.vc_var->v_value;
 753    NYD_LEAVE;
 754    return rv;
 755 }
 756
 757 FL bool_t
 758 _var_okset(enum okeys okey, uintptr_t val)
 759 {
 760    struct var_carrier vc;
 761    bool_t rv;
 762    NYD_ENTER;
 763
 764    vc.vc_vmap = _var_map + okey;
 765    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 766    vc.vc_hash = _var_map[okey].vm_hash;
 767    vc.vc_okey = okey;
 768
 769    rv = _var_set(&vc, (val == 0x1 ? "" : (char const*)val));
 770    NYD_LEAVE;
 771    return rv;
 772 }
 773
 774 FL bool_t
 775 _var_okclear(enum okeys okey)
 776 {
 777    struct var_carrier vc;
 778    bool_t rv;
 779    NYD_ENTER;
 780
 781    vc.vc_vmap = _var_map + okey;
 782    vc.vc_name = _var_keydat + _var_map[okey].vm_keyoff;
 783    vc.vc_hash = _var_map[okey].vm_hash;
 784    vc.vc_okey = okey;
 785
 786    rv = _var_clear(&vc);
 787    NYD_LEAVE;
 788    return rv;
 789 }
 790
 791 FL char *
 792 _var_voklook(char const *vokey)
 793 {
 794    struct var_carrier vc;
 795    char *rv;
 796    NYD_ENTER;
 797
 798    _var_revlookup(&vc, vokey);
 799
 800    if (!_var_lookup(&vc)) {
 801       if ((rv = getenv(vc.vc_name)) != NULL) {
 802          _var_set(&vc, rv);
 803          assert(vc.vc_var != NULL);
 804          goto jvar;
 805       }
 806    } else
 807 jvar:
 808       rv = vc.vc_var->v_value;
 809    NYD_LEAVE;
 810    return rv;
 811 }
 812
 813 FL bool_t
 814 _var_vokset(char const *vokey, uintptr_t val)
 815 {
 816    struct var_carrier vc;
 817    bool_t rv;
 818    NYD_ENTER;
 819
 820    _var_revlookup(&vc, vokey);
 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_vokclear(char const *vokey)
 829 {
 830    struct var_carrier vc;
 831    bool_t rv;
 832    NYD_ENTER;
 833
 834    _var_revlookup(&vc, vokey);
 835
 836    rv = _var_clear(&vc);
 837    NYD_LEAVE;
 838    return rv;
 839 }
 840
 841 FL void
 842 var_list_all(void)
 843 {
 844    FILE *fp;
 845    char **vacp, **cap;
 846    struct var *vp;
 847    size_t no, i;
 848    char const *fmt;
 849    NYD_ENTER;
 850
 851    if ((fp = Ftmp(NULL, "listvars", OF_RDWR | OF_UNLINK | OF_REGISTER, 0600)) ==
 852          NULL) {
 853       perror("tmpfile");
 854       goto jleave;
 855    }
 856
 857    for (no = i = 0; i < MA_PRIME; ++i)
 858       for (vp = _vars[i]; vp != NULL; vp = vp->v_link)
 859          ++no;
 860    vacp = salloc(no * sizeof(*vacp));
 861    for (cap = vacp, i = 0; i < MA_PRIME; ++i)
 862       for (vp = _vars[i]; vp != NULL; vp = vp->v_link)
 863          *cap++ = vp->v_name;
 864
 865    if (no > 1)
 866       qsort(vacp, no, sizeof *vacp, &_var_list_all_cmp);
 867
 868    i = (ok_blook(bsdcompat) || ok_blook(bsdset));
 869    fmt = (i != 0) ? "%s\t%s\n" : "%s=\"%s\"\n";
 870
 871    for (cap = vacp; no != 0; ++cap, --no) {
 872       char *cp = vok_vlook(*cap); /* XXX when lookup checks val/bin, change */
 873       if (cp == NULL)
 874          cp = UNCONST("");
 875       if (i || *cp != '\0')
 876          fprintf(fp, fmt, *cap, cp);
 877       else
 878          fprintf(fp, "%s\n", *cap);
 879    }
 880
 881    page_or_print(fp, PTR2SIZE(cap - vacp));
 882    Fclose(fp);
 883 jleave:
 884    NYD_LEAVE;
 885 }
 886
 887 FL int
 888 c_var_inspect(void *v)
 889 {
 890    struct var_carrier vc;
 891    char **argv = v, *val;
 892    bool_t isenv, isset;
 893    NYD_ENTER;
 894
 895    if (*argv == NULL) {
 896       v = NULL;
 897       goto jleave;
 898    }
 899
 900    for (; *argv != NULL; ++argv) {
 901       memset(&vc, 0, sizeof vc);
 902       _var_revlookup(&vc, *argv);
 903       if (_var_lookup(&vc)) {
 904          val = vc.vc_var->v_value;
 905          isenv = FAL0;
 906       } else
 907          isenv = ((val = getenv(vc.vc_name)) != NULL);
 908       if (val == NULL)
 909          val = UNCONST("NULL");
 910       isset = (vc.vc_var != NULL);
 911
 912       if (vc.vc_vmap != NULL) {
 913          if (vc.vc_vmap->vm_binary)
 914             printf("%s: binary option (%d): isset=%d/environ=%d\n",
 915                vc.vc_name, vc.vc_okey, isset, isenv);
 916          else
 917             printf("%s: value option (%d): isset=%d/environ=%d value<%s>\n",
 918                vc.vc_name, vc.vc_okey, isset, isenv, val);
 919       } else
 920          printf("%s: isset=%d/environ=%d value<%s>\n",
 921             vc.vc_name, isset, isenv, val);
 922    }
 923 jleave:
 924    NYD_LEAVE;
 925    return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
 926 }
 927
 928 FL int
 929 c_define(void *v)
 930 {
 931    int rv = 1;
 932    char **args = v;
 933    char const *errs;
 934    NYD_ENTER;
 935
 936    if (args[0] == NULL) {
 937       errs = tr(504, "Missing macro name to `define'");
 938       goto jerr;
 939    }
 940    if (args[1] == NULL || args[1][0] != '{' || args[1][1] != '\0' ||
 941          args[2] != NULL) {
 942       errs = tr(505, "Syntax is: define <name> {");
 943       goto jerr;
 944    }
 945
 946    rv = !_define1(args[0], MA_NONE);
 947 jleave:
 948    NYD_LEAVE;
 949    return rv;
 950 jerr:
 951    fprintf(stderr, "%s\n", errs);
 952    goto jleave;
 953 }
 954
 955 FL int
 956 c_undef(void *v)
 957 {
 958    int rv = 1;
 959    char **args = v;
 960    NYD_ENTER;
 961
 962    if (*args == NULL) {
 963       fprintf(stderr, tr(506, "Missing macro name to `undef'\n"));
 964       goto jleave;
 965    }
 966    do
 967       _undef1(*args, MA_NONE);
 968    while (*++args != NULL);
 969    rv = 0;
 970 jleave:
 971    NYD_LEAVE;
 972    return rv;
 973 }
 974
 975 FL int
 976 c_call(void *v)
 977 {
 978    int rv = 1;
 979    char **args = v;
 980    char const *errs, *name;
 981    struct macro *mp;
 982    NYD_ENTER;
 983
 984    if (args[0] == NULL || (args[1] != NULL && args[2] != NULL)) {
 985       errs = tr(507, "Syntax is: call <%s>\n");
 986       name = "name";
 987       goto jerr;
 988    }
 989
 990    if ((mp = _malook(*args, NULL, MA_NONE)) == NULL) {
 991       errs = tr(508, "Undefined macro called: \"%s\"\n");
 992       name = *args;
 993       goto jerr;
 994    }
 995
 996    rv = _maexec(mp, NULL);
 997 jleave:
 998    NYD_LEAVE;
 999    return rv;
1000 jerr:
1001    fprintf(stderr, errs, name);
1002    goto jleave;
1003 }
1004
1005 FL int
1006 callhook(char const *name, int nmail)
1007 {
1008    int len, rv;
1009    struct macro *mp;
1010    char *var, *cp;
1011    NYD_ENTER;
1012
1013    var = ac_alloc(len = strlen(name) + 13);
1014    snprintf(var, len, "folder-hook-%s", name);
1015    if ((cp = vok_vlook(var)) == NULL && (cp = ok_vlook(folder_hook)) == NULL) {
1016       rv = 0;
1017       goto jleave;
1018    }
1019    if ((mp = _malook(cp, NULL, MA_NONE)) == NULL) {
1020       fprintf(stderr, tr(49, "Cannot call hook for folder \"%s\": "
1021          "Macro \"%s\" does not exist.\n"), name, cp);
1022       rv = 1;
1023       goto jleave;
1024    }
1025
1026    inhook = nmail ? 3 : 1; /* XXX enum state machine */
1027    rv = _maexec(mp, NULL);
1028    inhook = 0;
1029 jleave:
1030    ac_free(var);
1031    NYD_LEAVE;
1032    return rv;
1033 }
1034
1035 FL int
1036 c_defines(void *v)
1037 {
1038    int rv;
1039    NYD_ENTER;
1040    UNUSED(v);
1041
1042    rv = _list_macros(MA_NONE);
1043    NYD_LEAVE;
1044    return rv;
1045 }
1046
1047 FL int
1048 c_account(void *v)
1049 {
1050    char **args = v;
1051    struct macro *mp;
1052    int rv = 1, i, oqf, nqf;
1053    NYD_ENTER;
1054
1055    if (args[0] == NULL) {
1056       rv = _list_macros(MA_ACC);
1057       goto jleave;
1058    }
1059
1060    if (args[1] && args[1][0] == '{' && args[1][1] == '\0') {
1061       if (args[2] != NULL) {
1062          fprintf(stderr, tr(517, "Syntax is: account <name> {\n"));
1063          goto jleave;
1064       }
1065       if (!asccasecmp(args[0], ACCOUNT_NULL)) {
1066          fprintf(stderr, tr(521, "Error: `%s' is a reserved name.\n"),
1067             ACCOUNT_NULL);
1068          goto jleave;
1069       }
1070       rv = !_define1(args[0], MA_ACC);
1071       goto jleave;
1072    }
1073
1074    if (inhook) {
1075       fprintf(stderr, tr(518, "Cannot change account from within a hook.\n"));
1076       goto jleave;
1077    }
1078
1079    save_mbox_for_possible_quitstuff();
1080
1081    mp = NULL;
1082    if (asccasecmp(args[0], ACCOUNT_NULL) != 0 &&
1083          (mp = _malook(args[0], NULL, MA_ACC)) == NULL) {
1084       fprintf(stderr, tr(519, "Account `%s' does not exist.\n"), args[0]);
1085       goto jleave;
1086    }
1087
1088    oqf = savequitflags();
1089    if (_acc_curr != NULL)
1090       _localopts_unroll(&_acc_curr->ma_localopts);
1091    account_name = (mp != NULL) ? mp->ma_name : NULL;
1092    _acc_curr = mp;
1093
1094    if (mp != NULL && _maexec(mp, &mp->ma_localopts) == CBAD) {
1095       /* XXX account switch incomplete, unroll? */
1096       fprintf(stderr, tr(520, "Switching to account `%s' failed.\n"), args[0]);
1097       goto jleave;
1098    }
1099
1100    if (!starting && !inhook) {
1101       nqf = savequitflags(); /* TODO obsolete (leave -> void -> new box!) */
1102       restorequitflags(oqf);
1103       if ((i = setfile("%", 0)) < 0)
1104          goto jleave;
1105       callhook(mailname, 0);
1106       if (i > 0 && !ok_blook(emptystart))
1107          goto jleave;
1108       announce(ok_blook(bsdcompat) || ok_blook(bsdannounce));
1109       restorequitflags(nqf);
1110    }
1111    rv = 0;
1112 jleave:
1113    NYD_LEAVE;
1114    return rv;
1115 }
1116
1117 FL int
1118 c_localopts(void *v)
1119 {
1120    int rv = 1;
1121    char **c = v;
1122    NYD_ENTER;
1123
1124    if (_localopts == NULL) {
1125       fprintf(stderr, tr(522,
1126          "Cannot use `localopts' but from within a `define' or `account'\n"));
1127       goto jleave;
1128    }
1129
1130    _localopts->s_unroll = (**c == '0') ? FAL0 : TRU1;
1131    rv = 0;
1132 jleave:
1133    NYD_LEAVE;
1134    return rv;
1135 }
1136
1137 /* vim:set fenc=utf-8:s-it-mode */