mirror of
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037def9693
- It no longer attempts to fiddle wall-vs-UTC-in-RTC. The results were just confusing most of the time. - The program no longer contains a pre-compiled list of timezones (compiled by groveling through the tzdata source files for comments starting with `ZONE-DESCR'). Now it uses the new `zone.tab' file supplied with current versions of the timezone data files, to determine the list at run time. (It also requires the ISO 3166 table I committed some months ago.) AS A RESULT, this program will NOT work until the new timezone data files are committed (should happen sometime soon).
652 lines
16 KiB
C
652 lines
16 KiB
C
/*
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* Copyright 1996 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*/
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/*
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* Second attempt at a `tzmenu' program, using the separate description
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* files provided in newer tzdata releases.
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*/
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#include <sys/types.h>
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#include <dialog.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/fcntl.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include "paths.h"
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static int reallydoit = 1;
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static int continent_country_menu(dialogMenuItem *);
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static int set_zone_multi(dialogMenuItem *);
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static int set_zone_whole_country(dialogMenuItem *);
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static int set_zone_menu(dialogMenuItem *);
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struct continent {
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dialogMenuItem *menu;
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int nitems;
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int ch;
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int sc;
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};
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static struct continent africa, america, antarctica, arctic, asia, atlantic;
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static struct continent australia, europe, indian, pacific;
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static struct continent_names {
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char *name;
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struct continent *continent;
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} continent_names[] = {
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{ "Africa", &africa }, { "America", &america },
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{ "Antarctica", &antarctica }, { "Arctic", &arctic },
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{ "Asia", &asia },
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{ "Atlantic", &atlantic }, { "Australia", &australia },
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{ "Europe", &europe }, { "Indian", &indian }, { "Pacific", &pacific }
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};
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static dialogMenuItem continents[] = {
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{ "1", "Africa", 0, continent_country_menu, 0, &africa },
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{ "2", "America -- North and South", 0, continent_country_menu, 0,
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&america },
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{ "3", "Antarctica", 0, continent_country_menu, 0, &antarctica },
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{ "4", "Arctic Ocean", 0, continent_country_menu, 0, &arctic },
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{ "5", "Asia", 0, continent_country_menu, 0, &asia },
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{ "6", "Atlantic Ocean", 0, continent_country_menu, 0, &atlantic },
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{ "7", "Australia", 0, continent_country_menu, 0, &australia },
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{ "8", "Europe", 0, continent_country_menu, 0, &europe },
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{ "9", "Indian Ocean", 0, continent_country_menu, 0, &indian },
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{ "0", "Pacific Ocean", 0, continent_country_menu, 0, &pacific }
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};
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#define NCONTINENTS ((sizeof continents)/(sizeof continents[0]))
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#define OCEANP(x) ((x) == 3 || (x) == 5 || (x) == 8 || (x) == 9)
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static int
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continent_country_menu(dialogMenuItem *continent)
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{
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int rv;
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struct continent *contp = continent->data;
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char title[256];
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int isocean = OCEANP(continent - continents);
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int menulen;
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/* Short cut -- if there's only one country, don't post a menu. */
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if (contp->nitems == 1) {
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return set_zone_menu(&contp->menu[0]);
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}
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/* It's amazing how much good grammar really matters... */
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if (!isocean)
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snprintf(title, sizeof title, "Countries in %s",
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continent->title);
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else
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snprintf(title, sizeof title, "Islands and groups in the %s",
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continent->title);
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menulen = contp->nitems < 16 ? contp->nitems : 16;
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rv = dialog_menu(title, (isocean ? "Select an island or group"
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: "Select a country"), -1, -1, menulen,
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-contp->nitems, contp->menu, 0, &contp->ch,
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&contp->sc);
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if (rv == 0)
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return DITEM_LEAVE_MENU;
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return DITEM_RECREATE;
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}
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static struct continent *
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find_continent(const char *name)
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{
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int i;
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for (i = 0; i < NCONTINENTS; i++) {
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if (strcmp(name, continent_names[i].name) == 0)
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return continent_names[i].continent;
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}
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return 0;
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}
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struct country {
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char *name;
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char *tlc;
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int nzones;
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char *filename; /* use iff nzones < 0 */
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struct continent *continent; /* use iff nzones < 0 */
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TAILQ_HEAD(, zone) zones; /* use iff nzones > 0 */
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dialogMenuItem *submenu; /* use iff nzones > 0 */
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};
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struct zone {
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TAILQ_ENTRY(zone) link;
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char *descr;
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char *filename;
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struct continent *continent;
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};
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/*
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* This is the easiest organization... we use ISO 3166 country codes,
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* of the two-letter variety, so we just size this array to suit.
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* Beats worrying about dynamic allocation.
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*/
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static struct country countries[26*26];
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#define CODE2INT(s) ((s[0] - 'A') * 26 + (s[1] - 'A'))
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/*
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* Read the ISO 3166 country code database in _PATH_ISO3166
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* (/usr/share/misc/iso3166). On error, exit via err(3).
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*/
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static void
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read_iso3166_table(void)
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{
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FILE *fp;
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char *s, *t, *name;
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size_t len;
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int lineno;
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struct country *cp;
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fp = fopen(_PATH_ISO3166, "r");
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if (!fp)
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err(1, _PATH_ISO3166);
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lineno = 0;
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while ((s = fgetln(fp, &len)) != 0) {
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lineno++;
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if (s[len - 1] != '\n')
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errx(1, _PATH_ISO3166 ":%d: invalid format", lineno);
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s[len - 1] = '\0';
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if (s[0] == '#')
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continue;
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/* Isolate the two-letter code. */
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t = strsep(&s, "\t");
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if (t == 0 || strlen(t) != 2)
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errx(1, _PATH_ISO3166 ":%d: invalid format", lineno);
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if (t[0] < 'A' || t[0] > 'Z' || t[1] < 'A' || t[1] > 'Z')
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errx(1, _PATH_ISO3166 ":%d: invalid code `%s'",
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lineno, t);
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/* Now skip past the three-letter and numeric codes. */
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name = strsep(&s, "\t"); /* 3-let */
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if (name == 0 || strlen(name) != 3)
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errx(1, _PATH_ISO3166 ":%d: invalid format", lineno);
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name = strsep(&s, "\t"); /* numeric */
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if (name == 0 || strlen(name) != 3)
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errx(1, _PATH_ISO3166 ":%d: invalid format", lineno);
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name = s;
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cp = &countries[CODE2INT(t)];
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if (cp->name)
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errx(1, _PATH_ISO3166
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":%d: country code `%s' multiply defined: %s",
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lineno, t, cp->name);
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cp->name = strdup(name);
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cp->tlc = strdup(t);
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}
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fclose(fp);
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}
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static void
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add_zone_to_country(int lineno, const char *tlc, const char *descr,
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const char *file, struct continent *cont)
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{
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struct zone *zp;
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struct country *cp;
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if (tlc[0] < 'A' || tlc[0] > 'Z' || tlc[1] < 'A' || tlc[1] > 'Z')
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errx(1, _PATH_ZONETAB ":%d: country code `%s' invalid",
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lineno, tlc);
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cp = &countries[CODE2INT(tlc)];
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if (cp->name == 0)
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errx(1, _PATH_ZONETAB ":%d: country code `%s' unknown",
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lineno, tlc);
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if (descr) {
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if (cp->nzones < 0)
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errx(1, _PATH_ZONETAB
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":%d: conflicting zone definition", lineno);
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zp = malloc(sizeof *zp);
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if (zp == 0)
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err(1, "malloc(%lu)", (unsigned long)sizeof *zp);
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if (cp->nzones == 0)
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TAILQ_INIT(&cp->zones);
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zp->descr = strdup(descr);
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zp->filename = strdup(file);
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zp->continent = cont;
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TAILQ_INSERT_TAIL(&cp->zones, zp, link);
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cp->nzones++;
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} else {
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if (cp->nzones > 0)
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errx(1, _PATH_ZONETAB
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":%d: zone must have description", lineno);
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if (cp->nzones < 0)
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errx(1, _PATH_ZONETAB
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":%d: zone multiply defined", lineno);
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cp->nzones = -1;
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cp->filename = strdup(file);
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cp->continent = cont;
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}
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}
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/*
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* This comparison function intentionally sorts all of the null-named
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* ``countries''---i.e., the codes that don't correspond to a real
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* country---to the end. Everything else is lexical by country name.
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*/
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static int
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compare_countries(const void *xa, const void *xb)
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{
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const struct country *a = xa, *b = xb;
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if (a->name == 0 && b->name == 0)
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return 0;
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if (a->name == 0 && b->name != 0)
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return 1;
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if (b->name == 0)
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return -1;
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return strcmp(a->name, b->name);
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}
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/*
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* This must be done AFTER all zone descriptions are read, since it breaks
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* CODE2INT().
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*/
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static void
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sort_countries(void)
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{
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qsort(countries, 576, sizeof countries[0], compare_countries);
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}
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static void
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read_zones(void)
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{
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FILE *fp;
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char *line;
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size_t len;
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int lineno;
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char *tlc, *coord, *file, *descr, *p;
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char contbuf[16];
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struct continent *cont;
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fp = fopen(_PATH_ZONETAB, "r");
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if (!fp)
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err(1, _PATH_ZONETAB);
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lineno = 0;
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while ((line = fgetln(fp, &len)) != 0) {
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lineno++;
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if (line[len - 1] != '\n')
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errx(1, _PATH_ZONETAB ":%d: invalid format", lineno);
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line[len - 1] = '\0';
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if (line[0] == '#')
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continue;
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tlc = strsep(&line, "\t");
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if (strlen(tlc) != 2)
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errx(1, _PATH_ZONETAB ":%d: invalid country code `%s'",
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lineno, tlc);
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coord = strsep(&line, "\t");
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file = strsep(&line, "\t");
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p = strchr(file, '/');
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if (p == 0)
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errx(1, _PATH_ZONETAB ":%d: invalid zone name `%s'",
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lineno, file);
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contbuf[0] = '\0';
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strncat(contbuf, file, p - file);
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cont = find_continent(contbuf);
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if (!cont)
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errx(1, _PATH_ZONETAB ":%d: invalid region `%s'",
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lineno, contbuf);
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descr = (line && *line) ? line : 0;
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add_zone_to_country(lineno, tlc, descr, file, cont);
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}
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fclose(fp);
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}
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static void
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make_menus(void)
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{
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struct country *cp;
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struct zone *zp, *zp2;
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struct continent *cont;
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dialogMenuItem *dmi;
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int i;
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/*
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* First, count up all the countries in each continent/ocean.
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* Be careful to count those countries which have multiple zones
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* only once for each. NB: some countries are in multiple
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* continents/oceans.
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*/
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for (cp = countries; cp->name; cp++) {
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if (cp->nzones == 0)
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continue;
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if (cp->nzones < 0) {
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cp->continent->nitems++;
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} else {
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for (zp = cp->zones.tqh_first; zp;
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zp = zp->link.tqe_next) {
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cont = zp->continent;
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for (zp2 = cp->zones.tqh_first;
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zp2->continent != cont;
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zp2 = zp2->link.tqe_next)
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;
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if (zp2 == zp)
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zp->continent->nitems++;
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}
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}
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}
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/*
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* Now allocate memory for the country menus. We set
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* nitems back to zero so that we can use it for counting
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* again when we actually build the menus.
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*/
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for (i = 0; i < NCONTINENTS; i++) {
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continent_names[i].continent->menu =
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malloc(sizeof(dialogMenuItem) *
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continent_names[i].continent->nitems);
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if (continent_names[i].continent->menu == 0)
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err(1, "malloc for continent menu");
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continent_names[i].continent->nitems = 0;
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}
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/*
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* Now that memory is allocated, create the menu items for
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* each continent. For multiple-zone countries, also create
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* the country's zone submenu.
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*/
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for (cp = countries; cp->name; cp++) {
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if (cp->nzones == 0)
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continue;
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if (cp->nzones < 0) {
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dmi = &cp->continent->menu[cp->continent->nitems];
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memset(dmi, 0, sizeof *dmi);
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asprintf(&dmi->prompt, "%d",
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++cp->continent->nitems);
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dmi->title = cp->name;
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dmi->checked = 0;
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dmi->fire = set_zone_whole_country;
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dmi->selected = 0;
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dmi->data = cp;
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} else {
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cp->submenu = malloc(cp->nzones * sizeof *dmi);
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if (cp->submenu == 0)
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err(1, "malloc for submenu");
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cp->nzones = 0;
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for (zp = cp->zones.tqh_first; zp;
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zp = zp->link.tqe_next) {
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cont = zp->continent;
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dmi = &cp->submenu[cp->nzones];
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memset(dmi, 0, sizeof *dmi);
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asprintf(&dmi->prompt, "%d",
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++cp->nzones);
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dmi->title = zp->descr;
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dmi->checked = 0;
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dmi->fire = set_zone_multi;
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dmi->selected = 0;
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dmi->data = zp;
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for (zp2 = cp->zones.tqh_first;
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zp2->continent != cont;
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zp2 = zp2->link.tqe_next)
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;
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if (zp2 != zp)
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continue;
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dmi = &cont->menu[cont->nitems];
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memset(dmi, 0, sizeof *dmi);
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asprintf(&dmi->prompt, "%d", ++cont->nitems);
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dmi->title = cp->name;
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dmi->checked = 0;
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dmi->fire = set_zone_menu;
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dmi->selected = 0;
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dmi->data = cp;
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}
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}
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}
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}
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static int
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set_zone_menu(dialogMenuItem *dmi)
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{
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int rv;
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char buf[256];
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struct country *cp = dmi->data;
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int menulen;
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snprintf(buf, sizeof buf, "%s Time Zones", cp->name);
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menulen = cp->nzones < 16 ? cp->nzones : 16;
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rv = dialog_menu(buf, "Select a zone which observes the same time as "
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"your locality.", -1, -1, menulen, -cp->nzones,
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cp->submenu, 0, 0, 0);
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if (rv != 0)
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return DITEM_RECREATE;
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return DITEM_LEAVE_MENU;
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}
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static int
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install_zone_file(const char *filename)
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{
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struct stat sb;
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int fd1, fd2;
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int copymode;
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char *msg;
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ssize_t len;
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char buf[1024];
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if (lstat(_PATH_LOCALTIME, &sb) < 0)
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/* Nothing there yet... */
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copymode = 1;
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else if(S_ISLNK(sb.st_mode))
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copymode = 0;
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else
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copymode = 1;
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if (copymode)
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asprintf(&msg, "Copying %s to " _PATH_LOCALTIME, filename);
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else
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asprintf(&msg, "Creating symbolic link " _PATH_LOCALTIME
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" to %s", filename);
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dialog_notify(msg);
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free(msg);
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if (reallydoit) {
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if (copymode) {
|
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fd1 = open(filename, O_RDONLY, 0);
|
|
if (fd1 < 0) {
|
|
asprintf(&msg, "Could not open %s: %s",
|
|
filename, strerror(errno));
|
|
dialog_mesgbox("Error", msg, 8, 72);
|
|
free(msg);
|
|
return DITEM_FAILURE | DITEM_RECREATE;
|
|
}
|
|
|
|
unlink(_PATH_LOCALTIME);
|
|
fd2 = open(_PATH_LOCALTIME,
|
|
O_CREAT | O_EXCL | O_WRONLY,
|
|
0444);
|
|
if (fd2 < 0) {
|
|
asprintf(&msg, "Could not open "
|
|
_PATH_LOCALTIME ": %s",
|
|
strerror(errno));
|
|
dialog_mesgbox("Error", msg, 8, 72);
|
|
free(msg);
|
|
return DITEM_FAILURE | DITEM_RECREATE;
|
|
}
|
|
|
|
while ((len = read(fd1, buf, sizeof buf)) > 0)
|
|
len = write(fd2, buf, len);
|
|
|
|
if (len == -1) {
|
|
asprintf(&msg, "Error copying %s to "
|
|
_PATH_LOCALTIME ": %s",
|
|
strerror(errno));
|
|
dialog_mesgbox("Error", msg, 8, 72);
|
|
free(msg);
|
|
/* Better to leave none than a corrupt one. */
|
|
unlink(_PATH_LOCALTIME);
|
|
return DITEM_FAILURE | DITEM_RECREATE;
|
|
}
|
|
close(fd1);
|
|
close(fd2);
|
|
} else {
|
|
if (access(filename, R_OK) != 0) {
|
|
asprintf(&msg, "Cannot access %s: %s",
|
|
filename, strerror(errno));
|
|
dialog_mesgbox("Error", msg, 8, 72);
|
|
free(msg);
|
|
return DITEM_FAILURE | DITEM_RECREATE;
|
|
}
|
|
unlink(_PATH_LOCALTIME);
|
|
if (symlink(filename, _PATH_LOCALTIME) < 0) {
|
|
asprintf(&msg, "Cannot create symbolic link "
|
|
_PATH_LOCALTIME " to %s: %s",
|
|
filename, strerror(errno));
|
|
dialog_mesgbox("Error", msg, 8, 72);
|
|
free(msg);
|
|
return DITEM_FAILURE | DITEM_RECREATE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (copymode)
|
|
asprintf(&msg, "Copied timezone file from %s to "
|
|
_PATH_LOCALTIME, filename);
|
|
else
|
|
asprintf(&msg, "Created symbolic link from " _PATH_LOCALTIME
|
|
" to %s", filename);
|
|
|
|
dialog_mesgbox("Done", msg, 8, 72);
|
|
free(msg);
|
|
return DITEM_LEAVE_MENU;
|
|
}
|
|
|
|
static int
|
|
confirm_zone(const char *filename)
|
|
{
|
|
char *msg;
|
|
struct tm *tm;
|
|
time_t t = time(0);
|
|
int rv;
|
|
|
|
setenv("TZ", filename, 1);
|
|
tzset();
|
|
tm = localtime(&t);
|
|
|
|
asprintf(&msg, "Does the abbreviation `%s' look reasonable?",
|
|
tm->tm_zone);
|
|
rv = !dialog_yesno("Confirmation", msg, 4, 72);
|
|
free(msg);
|
|
return rv;
|
|
}
|
|
|
|
static int
|
|
set_zone_multi(dialogMenuItem *dmi)
|
|
{
|
|
char *fn;
|
|
struct zone *zp = dmi->data;
|
|
int rv;
|
|
|
|
if (!confirm_zone(zp->filename))
|
|
return DITEM_FAILURE | DITEM_RECREATE;
|
|
|
|
asprintf(&fn, "%s/%s", _PATH_ZONEINFO, zp->filename);
|
|
rv = install_zone_file(fn);
|
|
free(fn);
|
|
return rv;
|
|
}
|
|
|
|
static int
|
|
set_zone_whole_country(dialogMenuItem *dmi)
|
|
{
|
|
char *fn;
|
|
struct country *cp = dmi->data;
|
|
int rv;
|
|
|
|
if (!confirm_zone(cp->filename))
|
|
return DITEM_FAILURE | DITEM_RECREATE;
|
|
|
|
asprintf(&fn, "%s/%s", _PATH_ZONEINFO, cp->filename);
|
|
rv = install_zone_file(fn);
|
|
free(fn);
|
|
return rv;
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int c;
|
|
int ch, sc;
|
|
|
|
while ((c = getopt(argc, argv, "n")) != -1) {
|
|
switch(c) {
|
|
case 'n':
|
|
reallydoit = 0;
|
|
break;
|
|
|
|
default:
|
|
fprintf(stderr, "%s: usage:\n\t%s [-n]\n", argv[0],
|
|
argv[0]);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
if (optind != argc) {
|
|
fprintf(stderr, "%s: usage:\n\t%s [-n]\n", argv[0], argv[0]);
|
|
exit(1);
|
|
}
|
|
|
|
read_iso3166_table();
|
|
read_zones();
|
|
sort_countries();
|
|
make_menus();
|
|
|
|
init_dialog();
|
|
dialog_menu("Time Zone Selector", "Select a region", -1, -1,
|
|
NCONTINENTS, -NCONTINENTS, continents, 0, &ch, &sc);
|
|
end_dialog();
|
|
return 0;
|
|
}
|
|
|