usr.sbin/tzsetup/tzsetup.c

   1 /*
   2  * Copyright 1996 Massachusetts Institute of Technology
   3  *
   4  * Permission to use, copy, modify, and distribute this software and
   5  * its documentation for any purpose and without fee is hereby
   6  * granted, provided that both the above copyright notice and this
   7  * permission notice appear in all copies, that both the above
   8  * copyright notice and this permission notice appear in all
   9  * supporting documentation, and that the name of M.I.T. not be used
  10  * in advertising or publicity pertaining to distribution of the
  11  * software without specific, written prior permission.  M.I.T. makes
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied
  14  * warranty.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
  17  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
  18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
  20  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 /*
  31  * Second attempt at a `tzmenu' program, using the separate description
  32  * files provided in newer tzdata releases.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <dialog.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <time.h>
  45 #include <unistd.h>
  46
  47 #include <sys/fcntl.h>
  48 #include <sys/param.h>
  49 #include <sys/queue.h>
  50 #include <sys/stat.h>
  51
  52 #define _PATH_ZONETAB           "/usr/share/zoneinfo/zone.tab"
  53 #define _PATH_ISO3166           "/usr/share/misc/iso3166"
  54 #define _PATH_ZONEINFO          "/usr/share/zoneinfo"
  55 #define _PATH_LOCALTIME         "/etc/localtime"
  56 #define _PATH_DB                "/var/db/zoneinfo"
  57 #define _PATH_WALL_CMOS_CLOCK   "/etc/wall_cmos_clock"
  58
  59 #ifdef PATH_MAX
  60 #define SILLY_BUFFER_SIZE       2*PATH_MAX
  61 #else
  62 #warning "Somebody needs to fix this to dynamically size this buffer."
  63 #define SILLY_BUFFER_SIZE       2048
  64 #endif
  65
  66 static char     path_zonetab[MAXPATHLEN], path_iso3166[MAXPATHLEN],
  67                 path_zoneinfo[MAXPATHLEN], path_localtime[MAXPATHLEN],
  68                 path_db[MAXPATHLEN], path_wall_cmos_clock[MAXPATHLEN];
  69
  70 static int reallydoit = 1;
  71 static int reinstall = 0;
  72 static int usedialog = 1;
  73 static char *chrootenv = NULL;
  74
  75 static void     usage(void);
  76 static int      confirm_zone(const char *filename);
  77 static int      continent_country_menu(dialogMenuItem *);
  78 static int      install_zoneinfo_file(const char *zoneinfo_file);
  79 static int      set_zone_multi(dialogMenuItem *);
  80 static int      set_zone_whole_country(dialogMenuItem *);
  81 static int      set_zone_menu(dialogMenuItem *);
  82 static int      set_zone_utc(void);
  83
  84 struct continent {
  85         dialogMenuItem *menu;
  86         int             nitems;
  87         int             ch;
  88         int             sc;
  89 };
  90
  91 static struct continent africa, america, antarctica, arctic, asia, atlantic;
  92 static struct continent australia, europe, indian, pacific, utc;
  93
  94 static struct continent_names {
  95         const char      *name;
  96         struct continent *continent;
  97 } continent_names[] = {
  98         { "Africa",     &africa },
  99         { "America",    &america },
 100         { "Antarctica", &antarctica },
 101         { "Arctic",     &arctic },
 102         { "Asia",       &asia },
 103         { "Atlantic",   &atlantic },
 104         { "Australia",  &australia },
 105         { "Europe",     &europe },
 106         { "Indian",     &indian },
 107         { "Pacific",    &pacific },
 108         { "UTC",        &utc }
 109 };
 110
 111 static struct continent_items {
 112         char            prompt[2];
 113         char            title[30];
 114 } continent_items[] = {
 115         { "1",  "Africa" },
 116         { "2",  "America -- North and South" },
 117         { "3",  "Antarctica" },
 118         { "4",  "Arctic Ocean" },
 119         { "5",  "Asia" },
 120         { "6",  "Atlantic Ocean" },
 121         { "7",  "Australia" },
 122         { "8",  "Europe" },
 123         { "9",  "Indian Ocean" },
 124         { "0",  "Pacific Ocean" },
 125         { "a",  "UTC" }
 126 };
 127
 128 #define NCONTINENTS     \
 129     (int)((sizeof(continent_items)) / (sizeof(continent_items[0])))
 130 static dialogMenuItem continents[NCONTINENTS];
 131
 132 #define OCEANP(x)       ((x) == 3 || (x) == 5 || (x) == 8 || (x) == 9)
 133
 134 static int
 135 continent_country_menu(dialogMenuItem *continent)
 136 {
 137         char            title[64], prompt[64];
 138         struct continent *contp = continent->data;
 139         int             isocean = OCEANP(continent - continents);
 140         int             menulen;
 141         int             rv;
 142
 143         if (strcmp(continent->title, "UTC") == 0)
 144                 return set_zone_utc();
 145
 146         /* Short cut -- if there's only one country, don't post a menu. */
 147         if (contp->nitems == 1)
 148                 return (contp->menu[0].fire(&contp->menu[0]));
 149
 150         /* It's amazing how much good grammar really matters... */
 151         if (!isocean) {
 152                 snprintf(title, sizeof(title), "Countries in %s",
 153                     continent->title);
 154                 snprintf(prompt, sizeof(prompt), "Select a country or region");
 155         } else {
 156                 snprintf(title, sizeof(title), "Islands and groups in the %s",
 157                     continent->title);
 158                 snprintf(prompt, sizeof(prompt), "Select an island or group");
 159         }
 160
 161         menulen = contp->nitems < 16 ? contp->nitems : 16;
 162         rv = dialog_menu(title, prompt, -1, -1, menulen, -contp->nitems,
 163             contp->menu, 0, &contp->ch, &contp->sc);
 164         if (rv == 0)
 165                 return (DITEM_LEAVE_MENU);
 166         return (DITEM_RECREATE);
 167 }
 168
 169 static struct continent *
 170 find_continent(const char *name)
 171 {
 172         int             i;
 173
 174         for (i = 0; i < NCONTINENTS; i++)
 175                 if (strcmp(name, continent_names[i].name) == 0)
 176                         return (continent_names[i].continent);
 177         return (0);
 178 }
 179
 180 struct country {
 181         char            *name;
 182         char            *tlc;
 183         int             nzones;
 184         char            *filename;      /* use iff nzones < 0 */
 185         struct continent *continent;    /* use iff nzones < 0 */
 186         TAILQ_HEAD(, zone) zones;       /* use iff nzones > 0 */
 187         dialogMenuItem  *submenu;       /* use iff nzones > 0 */
 188 };
 189
 190 struct zone {
 191         TAILQ_ENTRY(zone) link;
 192         char            *descr;
 193         char            *filename;
 194         struct continent *continent;
 195 };
 196
 197 /*
 198  * This is the easiest organization... we use ISO 3166 country codes,
 199  * of the two-letter variety, so we just size this array to suit.
 200  * Beats worrying about dynamic allocation.
 201  */
 202 #define NCOUNTRIES      (26 * 26)
 203 static struct country countries[NCOUNTRIES];
 204
 205 #define CODE2INT(s)     ((s[0] - 'A') * 26 + (s[1] - 'A'))
 206
 207 /*
 208  * Read the ISO 3166 country code database in _PATH_ISO3166
 209  * (/usr/share/misc/iso3166).  On error, exit via err(3).
 210  */
 211 static void
 212 read_iso3166_table(void)
 213 {
 214         FILE            *fp;
 215         struct country  *cp;
 216         size_t          len;
 217         char            *s, *t, *name;
 218         int             lineno;
 219
 220         fp = fopen(path_iso3166, "r");
 221         if (!fp)
 222                 err(1, "%s", path_iso3166);
 223         lineno = 0;
 224
 225         while ((s = fgetln(fp, &len)) != 0) {
 226                 lineno++;
 227                 if (s[len - 1] != '\n')
 228                         errx(1, "%s:%d: invalid format", path_iso3166, lineno);
 229                 s[len - 1] = '\0';
 230                 if (s[0] == '#' || strspn(s, " \t") == len - 1)
 231                         continue;
 232
 233                 /* Isolate the two-letter code. */
 234                 t = strsep(&s, "\t");
 235                 if (t == 0 || strlen(t) != 2)
 236                         errx(1, "%s:%d: invalid format", path_iso3166, lineno);
 237                 if (t[0] < 'A' || t[0] > 'Z' || t[1] < 'A' || t[1] > 'Z')
 238                         errx(1, "%s:%d: invalid code `%s'", path_iso3166,
 239                             lineno, t);
 240
 241                 /* Now skip past the three-letter and numeric codes. */
 242                 name = strsep(&s, "\t");        /* 3-let */
 243                 if (name == 0 || strlen(name) != 3)
 244                         errx(1, "%s:%d: invalid format", path_iso3166, lineno);
 245                 name = strsep(&s, "\t");        /* numeric */
 246                 if (name == 0 || strlen(name) != 3)
 247                         errx(1, "%s:%d: invalid format", path_iso3166, lineno);
 248
 249                 name = s;
 250
 251                 cp = &countries[CODE2INT(t)];
 252                 if (cp->name)
 253                         errx(1, "%s:%d: country code `%s' multiply defined: %s",
 254                             path_iso3166, lineno, t, cp->name);
 255                 cp->name = strdup(name);
 256                 if (cp->name == NULL)
 257                         errx(1, "malloc failed");
 258                 cp->tlc = strdup(t);
 259                 if (cp->tlc == NULL)
 260                         errx(1, "malloc failed");
 261         }
 262
 263         fclose(fp);
 264 }
 265
 266 static void
 267 add_zone_to_country(int lineno, const char *tlc, const char *descr,
 268     const char *file, struct continent *cont)
 269 {
 270         struct zone     *zp;
 271         struct country  *cp;
 272
 273         if (tlc[0] < 'A' || tlc[0] > 'Z' || tlc[1] < 'A' || tlc[1] > 'Z')
 274                 errx(1, "%s:%d: country code `%s' invalid", path_zonetab,
 275                     lineno, tlc);
 276
 277         cp = &countries[CODE2INT(tlc)];
 278         if (cp->name == 0)
 279                 errx(1, "%s:%d: country code `%s' unknown", path_zonetab,
 280                     lineno, tlc);
 281
 282         if (descr) {
 283                 if (cp->nzones < 0)
 284                         errx(1, "%s:%d: conflicting zone definition",
 285                             path_zonetab, lineno);
 286
 287                 zp = malloc(sizeof(*zp));
 288                 if (zp == 0)
 289                         errx(1, "malloc(%zu)", sizeof(*zp));
 290
 291                 if (cp->nzones == 0)
 292                         TAILQ_INIT(&cp->zones);
 293
 294                 zp->descr = strdup(descr);
 295                 if (zp->descr == NULL)
 296                         errx(1, "malloc failed");
 297                 zp->filename = strdup(file);
 298                 if (zp->filename == NULL)
 299                         errx(1, "malloc failed");
 300                 zp->continent = cont;
 301                 TAILQ_INSERT_TAIL(&cp->zones, zp, link);
 302                 cp->nzones++;
 303         } else {
 304                 if (cp->nzones > 0)
 305                         errx(1, "%s:%d: zone must have description",
 306                             path_zonetab, lineno);
 307                 if (cp->nzones < 0)
 308                         errx(1, "%s:%d: zone multiply defined",
 309                             path_zonetab, lineno);
 310                 cp->nzones = -1;
 311                 cp->filename = strdup(file);
 312                 if (cp->filename == NULL)
 313                         errx(1, "malloc failed");
 314                 cp->continent = cont;
 315         }
 316 }
 317
 318 /*
 319  * This comparison function intentionally sorts all of the null-named
 320  * ``countries''---i.e., the codes that don't correspond to a real
 321  * country---to the end.  Everything else is lexical by country name.
 322  */
 323 static int
 324 compare_countries(const void *xa, const void *xb)
 325 {
 326         const struct country *a = xa, *b = xb;
 327
 328         if (a->name == 0 && b->name == 0)
 329                 return (0);
 330         if (a->name == 0 && b->name != 0)
 331                 return (1);
 332         if (b->name == 0)
 333                 return (-1);
 334
 335         return (strcmp(a->name, b->name));
 336 }
 337
 338 /*
 339  * This must be done AFTER all zone descriptions are read, since it breaks
 340  * CODE2INT().
 341  */
 342 static void
 343 sort_countries(void)
 344 {
 345
 346         qsort(countries, NCOUNTRIES, sizeof(countries[0]), compare_countries);
 347 }
 348
 349 static void
 350 read_zones(void)
 351 {
 352         char            contbuf[16];
 353         FILE            *fp;
 354         struct continent *cont;
 355         size_t          len;
 356         char            *line, *tlc, *coord, *file, *descr, *p;
 357         int             lineno;
 358
 359         fp = fopen(path_zonetab, "r");
 360         if (!fp)
 361                 err(1, "%s", path_zonetab);
 362         lineno = 0;
 363
 364         while ((line = fgetln(fp, &len)) != 0) {
 365                 lineno++;
 366                 if (line[len - 1] != '\n')
 367                         errx(1, "%s:%d: invalid format", path_zonetab, lineno);
 368                 line[len - 1] = '\0';
 369                 if (line[0] == '#')
 370                         continue;
 371
 372                 tlc = strsep(&line, "\t");
 373                 if (strlen(tlc) != 2)
 374                         errx(1, "%s:%d: invalid country code `%s'",
 375                             path_zonetab, lineno, tlc);
 376                 coord = strsep(&line, "\t");     /* Unused */
 377                 file = strsep(&line, "\t");
 378                 p = strchr(file, '/');
 379                 if (p == 0)
 380                         errx(1, "%s:%d: invalid zone name `%s'", path_zonetab,
 381                             lineno, file);
 382                 contbuf[0] = '\0';
 383                 strncat(contbuf, file, p - file);
 384                 cont = find_continent(contbuf);
 385                 if (!cont)
 386                         errx(1, "%s:%d: invalid region `%s'", path_zonetab,
 387                             lineno, contbuf);
 388
 389                 descr = (line != NULL && *line != '\0') ? line : NULL;
 390
 391                 add_zone_to_country(lineno, tlc, descr, file, cont);
 392         }
 393         fclose(fp);
 394 }
 395
 396 static void
 397 make_menus(void)
 398 {
 399         struct country  *cp;
 400         struct zone     *zp, *zp2;
 401         struct continent *cont;
 402         dialogMenuItem  *dmi;
 403         int             i;
 404
 405         /*
 406          * First, count up all the countries in each continent/ocean.
 407          * Be careful to count those countries which have multiple zones
 408          * only once for each.  NB: some countries are in multiple
 409          * continents/oceans.
 410          */
 411         for (cp = countries; cp->name; cp++) {
 412                 if (cp->nzones == 0)
 413                         continue;
 414                 if (cp->nzones < 0) {
 415                         cp->continent->nitems++;
 416                 } else {
 417                         TAILQ_FOREACH(zp, &cp->zones, link) {
 418                                 cont = zp->continent;
 419                                 for (zp2 = TAILQ_FIRST(&cp->zones);
 420                                     zp2->continent != cont;
 421                                     zp2 = TAILQ_NEXT(zp2, link))
 422                                         ;
 423                                 if (zp2 == zp)
 424                                         zp->continent->nitems++;
 425                         }
 426                 }
 427         }
 428
 429         /*
 430          * Now allocate memory for the country menus and initialize
 431          * continent menus.  We set nitems back to zero so that we can
 432          * use it for counting again when we actually build the menus.
 433          */
 434         memset(continents, 0, sizeof(continents));
 435         for (i = 0; i < NCONTINENTS; i++) {
 436                 continent_names[i].continent->menu =
 437                     malloc(sizeof(dialogMenuItem) *
 438                     continent_names[i].continent->nitems);
 439                 if (continent_names[i].continent->menu == 0)
 440                         errx(1, "malloc for continent menu");
 441                 continent_names[i].continent->nitems = 0;
 442                 continents[i].prompt = continent_items[i].prompt;
 443                 continents[i].title = continent_items[i].title;
 444                 continents[i].fire = continent_country_menu;
 445                 continents[i].data = continent_names[i].continent;
 446         }
 447
 448         /*
 449          * Now that memory is allocated, create the menu items for
 450          * each continent.  For multiple-zone countries, also create
 451          * the country's zone submenu.
 452          */
 453         for (cp = countries; cp->name; cp++) {
 454                 if (cp->nzones == 0)
 455                         continue;
 456                 if (cp->nzones < 0) {
 457                         dmi = &cp->continent->menu[cp->continent->nitems];
 458                         memset(dmi, 0, sizeof(*dmi));
 459                         asprintf(&dmi->prompt, "%d", ++cp->continent->nitems);
 460                         dmi->title = cp->name;
 461                         dmi->checked = 0;
 462                         dmi->fire = set_zone_whole_country;
 463                         dmi->selected = 0;
 464                         dmi->data = cp;
 465                 } else {
 466                         cp->submenu = malloc(cp->nzones * sizeof(*dmi));
 467                         if (cp->submenu == 0)
 468                                 errx(1, "malloc for submenu");
 469                         cp->nzones = 0;
 470                         TAILQ_FOREACH(zp, &cp->zones, link) {
 471                                 cont = zp->continent;
 472                                 dmi = &cp->submenu[cp->nzones];
 473                                 memset(dmi, 0, sizeof(*dmi));
 474                                 asprintf(&dmi->prompt, "%d", ++cp->nzones);
 475                                 dmi->title = zp->descr;
 476                                 dmi->checked = 0;
 477                                 dmi->fire = set_zone_multi;
 478                                 dmi->selected = 0;
 479                                 dmi->data = zp;
 480
 481                                 for (zp2 = TAILQ_FIRST(&cp->zones);
 482                                     zp2->continent != cont;
 483                                     zp2 = TAILQ_NEXT(zp2, link))
 484                                         ;
 485                                 if (zp2 != zp)
 486                                         continue;
 487
 488                                 dmi = &cont->menu[cont->nitems];
 489                                 memset(dmi, 0, sizeof(*dmi));
 490                                 asprintf(&dmi->prompt, "%d", ++cont->nitems);
 491                                 dmi->title = cp->name;
 492                                 dmi->checked = 0;
 493                                 dmi->fire = set_zone_menu;
 494                                 dmi->selected = 0;
 495                                 dmi->data = cp;
 496                         }
 497                 }
 498         }
 499 }
 500
 501 static int
 502 set_zone_menu(dialogMenuItem *dmi)
 503 {
 504         char            title[64], prompt[64];
 505         struct country  *cp = dmi->data;
 506         int             menulen;
 507         int             rv;
 508
 509         snprintf(title, sizeof(title), "%s Time Zones", cp->name);
 510         snprintf(prompt, sizeof(prompt),
 511             "Select a zone which observes the same time as your locality.");
 512         menulen = cp->nzones < 16 ? cp->nzones : 16;
 513         rv = dialog_menu(title, prompt, -1, -1, menulen, -cp->nzones,
 514             cp->submenu, 0, 0, 0);
 515         if (rv != 0)
 516                 return (DITEM_RECREATE);
 517         return (DITEM_LEAVE_MENU);
 518 }
 519
 520 int
 521 set_zone_utc(void)
 522 {
 523         if (!confirm_zone(NULL))
 524                 return (DITEM_FAILURE | DITEM_RECREATE);
 525
 526         return (install_zoneinfo_file(NULL));
 527 }
 528
 529 static int
 530 install_zoneinfo_file(const char *zoneinfo_file)
 531 {
 532         char            buf[1024];
 533         char            title[64], prompt[SILLY_BUFFER_SIZE];
 534         struct stat     sb;
 535         ssize_t         len;
 536         int             fd1, fd2, copymode;
 537
 538         if (lstat(path_localtime, &sb) < 0) {
 539                 /* Nothing there yet... */
 540                 copymode = 1;
 541         } else if (S_ISLNK(sb.st_mode))
 542                 copymode = 0;
 543         else
 544                 copymode = 1;
 545
 546 #ifdef VERBOSE
 547         snprintf(title, sizeof(title), "Info");
 548         if (zoneinfo_file == NULL)
 549                 snprintf(prompt, sizeof(prompt),
 550                     "Removing %s", path_localtime);
 551         else if (copymode)
 552                 snprintf(prompt, sizeof(prompt),
 553                     "Copying %s to %s", zoneinfo_file, path_localtime);
 554         else
 555                 snprintf(prompt, sizeof(prompt),
 556                     "Creating symbolic link %s to %s",
 557                     path_localtime, zoneinfo_file);
 558         if (usedialog)
 559                 dialog_mesgbox(title, prompt, 8, 72);
 560         else
 561                 fprintf(stderr, "%s\n", prompt);
 562 #endif
 563
 564         if (reallydoit) {
 565                 if (zoneinfo_file == NULL) {
 566                         if (unlink(path_localtime) < 0 && errno != ENOENT) {
 567                                 snprintf(title, sizeof(title), "Error");
 568                                 snprintf(prompt, sizeof(prompt),
 569                                      "Could not delete %s: %s", path_localtime,
 570                                      strerror(errno));
 571                                 if (usedialog)
 572                                         dialog_mesgbox(title, prompt, 8, 72);
 573                                 else
 574                                         fprintf(stderr, "%s\n", prompt);
 575
 576                                 return (DITEM_FAILURE | DITEM_RECREATE);
 577                         }
 578                         if (unlink(path_db) < 0 && errno != ENOENT) {
 579                                 snprintf(title, sizeof(title), "Error");
 580                                 snprintf(prompt, sizeof(prompt),
 581                                      "Could not delete %s: %s", path_db,
 582                                      strerror(errno));
 583                                 if (usedialog)
 584                                         dialog_mesgbox(title, prompt, 8, 72);
 585                                 else
 586                                         fprintf(stderr, "%s\n", prompt);
 587
 588                                 return (DITEM_FAILURE | DITEM_RECREATE);
 589                         }
 590 #ifdef VERBOSE
 591                         snprintf(prompt, sizeof(prompt),
 592                             "Removed %s", path_localtime);
 593 #endif
 594                         return (DITEM_LEAVE_MENU);
 595                 }
 596
 597                 if (copymode) {
 598                         fd1 = open(zoneinfo_file, O_RDONLY, 0);
 599                         if (fd1 < 0) {
 600                                 snprintf(title, sizeof(title), "Error");
 601                                 snprintf(prompt, sizeof(prompt),
 602                                     "Could not open %s: %s", zoneinfo_file,
 603                                     strerror(errno));
 604                                 if (usedialog)
 605                                         dialog_mesgbox(title, prompt, 8, 72);
 606                                 else
 607                                         fprintf(stderr, "%s\n", prompt);
 608                                 return (DITEM_FAILURE | DITEM_RECREATE);
 609                         }
 610
 611                         if (unlink(path_localtime) < 0 && errno != ENOENT) {
 612                                 snprintf(prompt, sizeof(prompt),
 613                                     "Could not unlink %s: %s",
 614                                     path_localtime, strerror(errno));
 615                                 if (usedialog) {
 616                                         snprintf(title, sizeof(title), "Error");
 617                                         dialog_msgbox(title, prompt, 8, 72, 1);
 618                                 } else
 619                                         fprintf(stderr, "%s\n", prompt);
 620                                 return (DITEM_FAILURE | DITEM_RECREATE);
 621                         }
 622
 623                         fd2 = open(path_localtime, O_CREAT | O_EXCL | O_WRONLY,
 624                             S_IRUSR | S_IRGRP | S_IROTH);
 625                         if (fd2 < 0) {
 626                                 snprintf(title, sizeof(title), "Error");
 627                                 snprintf(prompt, sizeof(prompt),
 628                                     "Could not open %s: %s",
 629                                     path_localtime, strerror(errno));
 630                                 if (usedialog)
 631                                         dialog_mesgbox(title, prompt, 8, 72);
 632                                 else
 633                                         fprintf(stderr, "%s\n", prompt);
 634                                 return (DITEM_FAILURE | DITEM_RECREATE);
 635                         }
 636
 637                         while ((len = read(fd1, buf, sizeof(buf))) > 0)
 638                                 if ((len = write(fd2, buf, len)) < 0)
 639                                         break;
 640
 641                         if (len == -1) {
 642                                 snprintf(title, sizeof(title), "Error");
 643                                 snprintf(prompt, sizeof(prompt),
 644                                     "Error copying %s to %s %s", zoneinfo_file,
 645                                     path_localtime, strerror(errno));
 646                                 if (usedialog)
 647                                         dialog_mesgbox(title, prompt, 8, 72);
 648                                 else
 649                                         fprintf(stderr, "%s\n", prompt);
 650                                 /* Better to leave none than a corrupt one. */
 651                                 unlink(path_localtime);
 652                                 return (DITEM_FAILURE | DITEM_RECREATE);
 653                         }
 654                         close(fd1);
 655                         close(fd2);
 656                 } else {
 657                         if (access(zoneinfo_file, R_OK) != 0) {
 658                                 snprintf(title, sizeof(title), "Error");
 659                                 snprintf(prompt, sizeof(prompt),
 660                                     "Cannot access %s: %s", zoneinfo_file,
 661                                     strerror(errno));
 662                                 if (usedialog)
 663                                         dialog_mesgbox(title, prompt, 8, 72);
 664                                 else
 665                                         fprintf(stderr, "%s\n", prompt);
 666                                 return (DITEM_FAILURE | DITEM_RECREATE);
 667                         }
 668                         if (unlink(path_localtime) < 0 && errno != ENOENT) {
 669                                 snprintf(prompt, sizeof(prompt),
 670                                     "Could not unlink %s: %s",
 671                                     path_localtime, strerror(errno));
 672                                 if (usedialog) {
 673                                         snprintf(title, sizeof(title), "Error");
 674                                         dialog_msgbox(title, prompt, 8, 72, 1);
 675                                 } else
 676                                         fprintf(stderr, "%s\n", prompt);
 677                                 return (DITEM_FAILURE | DITEM_RECREATE);
 678                         }
 679                         if (symlink(zoneinfo_file, path_localtime) < 0) {
 680                                 snprintf(title, sizeof(title), "Error");
 681                                 snprintf(prompt, sizeof(prompt),
 682                                     "Cannot create symbolic link %s to %s: %s",
 683                                     path_localtime, zoneinfo_file,
 684                                     strerror(errno));
 685                                 if (usedialog)
 686                                         dialog_mesgbox(title, prompt, 8, 72);
 687                                 else
 688                                         fprintf(stderr, "%s\n", prompt);
 689                                 return (DITEM_FAILURE | DITEM_RECREATE);
 690                         }
 691                 }
 692
 693 #ifdef VERBOSE
 694                 snprintf(title, sizeof(title), "Done");
 695                 if (copymode)
 696                         snprintf(prompt, sizeof(prompt),
 697                             "Copied timezone file from %s to %s",
 698                             zoneinfo_file, path_localtime);
 699                 else
 700                         snprintf(prompt, sizeof(prompt),
 701                             "Created symbolic link from %s to %s",
 702                             zoneinfo_file, path_localtime);
 703                 if (usedialog)
 704                         dialog_mesgbox(title, prompt, 8, 72);
 705                 else
 706                         fprintf(stderr, "%s\n", prompt);
 707 #endif
 708         } /* reallydoit */
 709
 710         return (DITEM_LEAVE_MENU);
 711 }
 712
 713 static int
 714 install_zoneinfo(const char *zoneinfo)
 715 {
 716         int             rv;
 717         FILE            *f;
 718         char            path_zoneinfo_file[MAXPATHLEN];
 719
 720         sprintf(path_zoneinfo_file, "%s/%s", path_zoneinfo, zoneinfo);
 721         rv = install_zoneinfo_file(path_zoneinfo_file);
 722
 723         /* Save knowledge for later */
 724         if (reallydoit && (rv & DITEM_FAILURE) == 0) {
 725                 if ((f = fopen(path_db, "w")) != NULL) {
 726                         fprintf(f, "%s\n", zoneinfo);
 727                         fclose(f);
 728                 }
 729         }
 730
 731         return (rv);
 732 }
 733
 734 static int
 735 confirm_zone(const char *filename)
 736 {
 737         char            title[64], prompt[64];
 738         time_t          t = time(0);
 739         struct tm       *tm;
 740         int             rv;
 741
 742         setenv("TZ", filename == NULL ? "" : filename, 1);
 743         tzset();
 744         tm = localtime(&t);
 745
 746         snprintf(title, sizeof(title), "Confirmation");
 747         snprintf(prompt, sizeof(prompt),
 748             "Does the abbreviation `%s' look reasonable?", tm->tm_zone);
 749         rv = !dialog_yesno(title, prompt, 5, 72);
 750         return (rv);
 751 }
 752
 753 static int
 754 set_zone_multi(dialogMenuItem *dmi)
 755 {
 756         struct zone     *zp = dmi->data;
 757         int             rv;
 758
 759         if (!confirm_zone(zp->filename))
 760                 return (DITEM_FAILURE | DITEM_RECREATE);
 761
 762         rv = install_zoneinfo(zp->filename);
 763         return (rv);
 764 }
 765
 766 static int
 767 set_zone_whole_country(dialogMenuItem *dmi)
 768 {
 769         struct country  *cp = dmi->data;
 770         int             rv;
 771
 772         if (!confirm_zone(cp->filename))
 773                 return (DITEM_FAILURE | DITEM_RECREATE);
 774
 775         rv = install_zoneinfo(cp->filename);
 776         return (rv);
 777 }
 778
 779 static void
 780 usage(void)
 781 {
 782
 783         fprintf(stderr, "usage: tzsetup [-nrs] [-C chroot_directory]"
 784             " [zoneinfo_file | zoneinfo_name]\n");
 785         exit(1);
 786 }
 787
 788 #if defined(__sparc64__)
 789 #define DIALOG_UTC      dialog_yesno
 790 #else
 791 #define DIALOG_UTC      dialog_noyes
 792 #endif
 793
 794 int
 795 main(int argc, char **argv)
 796 {
 797         char            title[64], prompt[128];
 798         int             c, fd, rv, skiputc;
 799
 800         skiputc = 0;
 801         while ((c = getopt(argc, argv, "C:nrs")) != -1) {
 802                 switch(c) {
 803                 case 'C':
 804                         chrootenv = optarg;
 805                         break;
 806                 case 'n':
 807                         reallydoit = 0;
 808                         break;
 809                 case 'r':
 810                         reinstall = 1;
 811                         usedialog = 0;
 812                         break;
 813                 case 's':
 814                         skiputc = 1;
 815                         break;
 816                 default:
 817                         usage();
 818                 }
 819         }
 820
 821         if (argc - optind > 1)
 822                 usage();
 823
 824         if (chrootenv == NULL) {
 825                 strcpy(path_zonetab, _PATH_ZONETAB);
 826                 strcpy(path_iso3166, _PATH_ISO3166);
 827                 strcpy(path_zoneinfo, _PATH_ZONEINFO);
 828                 strcpy(path_localtime, _PATH_LOCALTIME);
 829                 strcpy(path_db, _PATH_DB);
 830                 strcpy(path_wall_cmos_clock, _PATH_WALL_CMOS_CLOCK);
 831         } else {
 832                 sprintf(path_zonetab, "%s/%s", chrootenv, _PATH_ZONETAB);
 833                 sprintf(path_iso3166, "%s/%s", chrootenv, _PATH_ISO3166);
 834                 sprintf(path_zoneinfo, "%s/%s", chrootenv, _PATH_ZONEINFO);
 835                 sprintf(path_localtime, "%s/%s", chrootenv, _PATH_LOCALTIME);
 836                 sprintf(path_db, "%s/%s", chrootenv, _PATH_DB);
 837                 sprintf(path_wall_cmos_clock, "%s/%s", chrootenv,
 838                     _PATH_WALL_CMOS_CLOCK);
 839         }
 840
 841
 842         /* Override the user-supplied umask. */
 843         (void)umask(S_IWGRP | S_IWOTH);
 844
 845         if (reinstall == 1) {
 846                 FILE *f;
 847                 char zoneinfo[MAXPATHLEN];
 848
 849                 if ((f = fopen(path_db, "r")) != NULL) {
 850                         if (fgets(zoneinfo, sizeof(zoneinfo), f) != NULL) {
 851                                 zoneinfo[sizeof(zoneinfo) - 1] = 0;
 852                                 if (strlen(zoneinfo) > 0) {
 853                                         zoneinfo[strlen(zoneinfo) - 1] = 0;
 854                                         rv = install_zoneinfo(zoneinfo);
 855                                         exit(rv & ~DITEM_LEAVE_MENU);
 856                                 }
 857                                 errx(1, "Error reading %s.\n", path_db);
 858                         }
 859                         fclose(f);
 860                         errx(1,
 861                             "Unable to determine earlier installed zoneinfo "
 862                             "name. Check %s", path_db);
 863                 }
 864                 errx(1, "Cannot open %s for reading. Does it exist?", path_db);
 865         }
 866
 867         /*
 868          * If the arguments on the command-line do not specify a file,
 869          * then interpret it as a zoneinfo name
 870          */
 871         if (optind == argc - 1) {
 872                 struct stat sb;
 873
 874                 if (stat(argv[optind], &sb) != 0) {
 875                         usedialog = 0;
 876                         rv = install_zoneinfo(argv[optind]);
 877                         exit(rv & ~DITEM_LEAVE_MENU);
 878                 }
 879                 /* FALLTHROUGH */
 880         }
 881
 882         read_iso3166_table();
 883         read_zones();
 884         sort_countries();
 885         make_menus();
 886
 887         init_dialog();
 888         if (skiputc == 0) {
 889                 snprintf(title, sizeof(title),
 890                     "Select local or UTC (Greenwich Mean Time) clock");
 891                 snprintf(prompt, sizeof(prompt),
 892                     "Is this machine's CMOS clock set to UTC?  "
 893                     "If it is set to local time,\n"
 894                     "or you don't know, please choose NO here!");
 895                 if (!DIALOG_UTC(title, prompt, 7, 72)) {
 896                         if (reallydoit)
 897                                 unlink(path_wall_cmos_clock);
 898                 } else {
 899                         if (reallydoit) {
 900                                 fd = open(path_wall_cmos_clock,
 901                                     O_WRONLY | O_CREAT | O_TRUNC,
 902                                     S_IRUSR | S_IRGRP | S_IROTH);
 903                                 if (fd < 0) {
 904                                         end_dialog();
 905                                         err(1, "create %s",
 906                                             path_wall_cmos_clock);
 907                                 }
 908                                 close(fd);
 909                         }
 910                 }
 911                 dialog_clear_norefresh();
 912         }
 913         if (optind == argc - 1) {
 914                 snprintf(title, sizeof(title), "Default timezone provided");
 915                 snprintf(prompt, sizeof(prompt),
 916                     "\nUse the default `%s' zone?", argv[optind]);
 917                 if (!dialog_yesno(title, prompt, 7, 72)) {
 918                         rv = install_zoneinfo_file(argv[optind]);
 919                         dialog_clear();
 920                         end_dialog();
 921                         exit(rv & ~DITEM_LEAVE_MENU);
 922                 }
 923                 dialog_clear_norefresh();
 924         }
 925         snprintf(title, sizeof(title), "Time Zone Selector");
 926         snprintf(prompt, sizeof(prompt), "Select a region");
 927         dialog_menu(title, prompt, -1, -1, NCONTINENTS, -NCONTINENTS,
 928             continents, 0, NULL, NULL);
 929
 930         dialog_clear();
 931         end_dialog();
 932         return (0);
 933 }