/*
* Copyright 1996 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Second attempt at a `tzmenu' program, using the separate description
* files provided in newer tzdata releases.
*/
#ifndef lint
static const char rcsid[] =
"$Id: tzsetup.c,v 1.11 1998/12/16 05:34:49 peter Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <dialog.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include "paths.h"
static int reallydoit = 1;
static int continent_country_menu(dialogMenuItem *);
static int set_zone_multi(dialogMenuItem *);
static int set_zone_whole_country(dialogMenuItem *);
static int set_zone_menu(dialogMenuItem *);
struct continent {
dialogMenuItem *menu;
int nitems;
int ch;
int sc;
};
static struct continent africa, america, antarctica, arctic, asia, atlantic;
static struct continent australia, europe, indian, pacific;
static struct continent_names {
char *name;
struct continent *continent;
} continent_names[] = {
{ "Africa", &africa }, { "America", &america },
{ "Antarctica", &antarctica }, { "Arctic", &arctic },
{ "Asia", &asia },
{ "Atlantic", &atlantic }, { "Australia", &australia },
{ "Europe", &europe }, { "Indian", &indian }, { "Pacific", &pacific }
};
static dialogMenuItem continents[] = {
{ "1", "Africa", 0, continent_country_menu, 0, &africa },
{ "2", "America -- North and South", 0, continent_country_menu, 0,
&america },
{ "3", "Antarctica", 0, continent_country_menu, 0, &antarctica },
{ "4", "Arctic Ocean", 0, continent_country_menu, 0, &arctic },
{ "5", "Asia", 0, continent_country_menu, 0, &asia },
{ "6", "Atlantic Ocean", 0, continent_country_menu, 0, &atlantic },
{ "7", "Australia", 0, continent_country_menu, 0, &australia },
{ "8", "Europe", 0, continent_country_menu, 0, &europe },
{ "9", "Indian Ocean", 0, continent_country_menu, 0, &indian },
{ "0", "Pacific Ocean", 0, continent_country_menu, 0, &pacific }
};
#define NCONTINENTS ((sizeof continents)/(sizeof continents[0]))
#define OCEANP(x) ((x) == 3 || (x) == 5 || (x) == 8 || (x) == 9)
static int
continent_country_menu(dialogMenuItem *continent)
{
int rv;
struct continent *contp = continent->data;
char title[256];
int isocean = OCEANP(continent - continents);
int menulen;
/* Short cut -- if there's only one country, don't post a menu. */
if (contp->nitems == 1) {
return set_zone_menu(&contp->menu[0]);
}
/* It's amazing how much good grammar really matters... */
if (!isocean)
snprintf(title, sizeof title, "Countries in %s",
continent->title);
else
snprintf(title, sizeof title, "Islands and groups in the %s",
continent->title);
menulen = contp->nitems < 16 ? contp->nitems : 16;
rv = dialog_menu(title, (isocean ? "Select an island or group"
: "Select a country"), -1, -1, menulen,
-contp->nitems, contp->menu, 0, &contp->ch,
&contp->sc);
if (rv == 0)
return DITEM_LEAVE_MENU;
return DITEM_RECREATE;
}
static struct continent *
find_continent(const char *name)
{
int i;
for (i = 0; i < NCONTINENTS; i++) {
if (strcmp(name, continent_names[i].name) == 0)
return continent_names[i].continent;
}
return 0;
}
struct country {
char *name;
char *tlc;
int nzones;
char *filename; /* use iff nzones < 0 */
struct continent *continent; /* use iff nzones < 0 */
TAILQ_HEAD(, zone) zones; /* use iff nzones > 0 */
dialogMenuItem *submenu; /* use iff nzones > 0 */
};
struct zone {
TAILQ_ENTRY(zone) link;
char *descr;
char *filename;
struct continent *continent;
};
/*
* This is the easiest organization... we use ISO 3166 country codes,
* of the two-letter variety, so we just size this array to suit.
* Beats worrying about dynamic allocation.
*/
#define NCOUNTRIES (26*26)
static struct country countries[NCOUNTRIES];
#define CODE2INT(s) ((s[0] - 'A') * 26 + (s[1] - 'A'))
/*
* Read the ISO 3166 country code database in _PATH_ISO3166
* (/usr/share/misc/iso3166). On error, exit via err(3).
*/
static void
read_iso3166_table(void)
{
FILE *fp;
char *s, *t, *name;
size_t len;
int lineno;
struct country *cp;
fp = fopen(_PATH_ISO3166, "r");
if (!fp)
err(1, _PATH_ISO3166);
lineno = 0;
while ((s = fgetln(fp, &len)) != 0) {
lineno++;
if (s[len - 1] != '\n')
errx(1, _PATH_ISO3166 ":%d: invalid format", lineno);
s[len - 1] = '\0';
if (s[0] == '#' || strspn(s, " \t") == len - 1)
continue;
/* Isolate the two-letter code. */
t = strsep(&s, "\t");
if (t == 0 || strlen(t) != 2)
errx(1, _PATH_ISO3166 ":%d: invalid format", lineno);
if (t[0] < 'A' || t[0] > 'Z' || t[1] < 'A' || t[1] > 'Z')
errx(1, _PATH_ISO3166 ":%d: invalid code `%s'",
lineno, t);
/* Now skip past the three-letter and numeric codes. */
name = strsep(&s, "\t"); /* 3-let */
if (name == 0 || strlen(name) != 3)
errx(1, _PATH_ISO3166 ":%d: invalid format", lineno);
name = strsep(&s, "\t"); /* numeric */
if (name == 0 || strlen(name) != 3)
errx(1, _PATH_ISO3166 ":%d: invalid format", lineno);
name = s;
cp = &countries[CODE2INT(t)];
if (cp->name)
errx(1, _PATH_ISO3166
":%d: country code `%s' multiply defined: %s",
lineno, t, cp->name);
cp->name = strdup(name);
cp->tlc = strdup(t);
}
fclose(fp);
}
static void
add_zone_to_country(int lineno, const char *tlc, const char *descr,
const char *file, struct continent *cont)
{
struct zone *zp;
struct country *cp;
if (tlc[0] < 'A' || tlc[0] > 'Z' || tlc[1] < 'A' || tlc[1] > 'Z')
errx(1, _PATH_ZONETAB ":%d: country code `%s' invalid",
lineno, tlc);
cp = &countries[CODE2INT(tlc)];
if (cp->name == 0)
errx(1, _PATH_ZONETAB ":%d: country code `%s' unknown",
lineno, tlc);
if (descr) {
if (cp->nzones < 0)
errx(1, _PATH_ZONETAB
":%d: conflicting zone definition", lineno);
zp = malloc(sizeof *zp);
if (zp == 0)
err(1, "malloc(%lu)", (unsigned long)sizeof *zp);
if (cp->nzones == 0)
TAILQ_INIT(&cp->zones);
zp->descr = strdup(descr);
zp->filename = strdup(file);
zp->continent = cont;
TAILQ_INSERT_TAIL(&cp->zones, zp, link);
cp->nzones++;
} else {
if (cp->nzones > 0)
errx(1, _PATH_ZONETAB
":%d: zone must have description", lineno);
if (cp->nzones < 0)
errx(1, _PATH_ZONETAB
":%d: zone multiply defined", lineno);
cp->nzones = -1;
cp->filename = strdup(file);
cp->continent = cont;
}
}
/*
* This comparison function intentionally sorts all of the null-named
* ``countries''---i.e., the codes that don't correspond to a real
* country---to the end. Everything else is lexical by country name.
*/
static int
compare_countries(const void *xa, const void *xb)
{
const struct country *a = xa, *b = xb;
if (a->name == 0 && b->name == 0)
return 0;
if (a->name == 0 && b->name != 0)
return 1;
if (b->name == 0)
return -1;
return strcmp(a->name, b->name);
}
/*
* This must be done AFTER all zone descriptions are read, since it breaks
* CODE2INT().
*/
static void
sort_countries(void)
{
qsort(countries, NCOUNTRIES, sizeof countries[0], compare_countries);
}
static void
read_zones(void)
{
FILE *fp;
char *line;
size_t len;
int lineno;
char *tlc, *coord, *file, *descr, *p;
char contbuf[16];
struct continent *cont;
fp = fopen(_PATH_ZONETAB, "r");
if (!fp)
err(1, _PATH_ZONETAB);
lineno = 0;
while ((line = fgetln(fp, &len)) != 0) {
lineno++;
if (line[len - 1] != '\n')
errx(1, _PATH_ZONETAB ":%d: invalid format", lineno);
line[len - 1] = '\0';
if (line[0] == '#')
continue;
tlc = strsep(&line, "\t");
if (strlen(tlc) != 2)
errx(1, _PATH_ZONETAB ":%d: invalid country code `%s'",
lineno, tlc);
coord = strsep(&line, "\t");
file = strsep(&line, "\t");
p = strchr(file, '/');
if (p == 0)
errx(1, _PATH_ZONETAB ":%d: invalid zone name `%s'",
lineno, file);
contbuf[0] = '\0';
strncat(contbuf, file, p - file);
cont = find_continent(contbuf);
if (!cont)
errx(1, _PATH_ZONETAB ":%d: invalid region `%s'",
lineno, contbuf);
descr = (line && *line) ? line : 0;
add_zone_to_country(lineno, tlc, descr, file, cont);
}
fclose(fp);
}
static void
make_menus(void)
{
struct country *cp;
struct zone *zp, *zp2;
struct continent *cont;
dialogMenuItem *dmi;
int i;
/*
* First, count up all the countries in each continent/ocean.
* Be careful to count those countries which have multiple zones
* only once for each. NB: some countries are in multiple
* continents/oceans.
*/
for (cp = countries; cp->name; cp++) {
if (cp->nzones == 0)
continue;
if (cp->nzones < 0) {
cp->continent->nitems++;
} else {
for (zp = cp->zones.tqh_first; zp;
zp = zp->link.tqe_next) {
cont = zp->continent;
for (zp2 = cp->zones.tqh_first;
zp2->continent != cont;
zp2 = zp2->link.tqe_next)
;
if (zp2 == zp)
zp->continent->nitems++;
}
}
}
/*
* Now allocate memory for the country menus. We set
* nitems back to zero so that we can use it for counting
* again when we actually build the menus.
*/
for (i = 0; i < NCONTINENTS; i++) {
continent_names[i].continent->menu =
malloc(sizeof(dialogMenuItem) *
continent_names[i].continent->nitems);
if (continent_names[i].continent->menu == 0)
err(1, "malloc for continent menu");
continent_names[i].continent->nitems = 0;
}
/*
* Now that memory is allocated, create the menu items for
* each continent. For multiple-zone countries, also create
* the country's zone submenu.
*/
for (cp = countries; cp->name; cp++) {
if (cp->nzones == 0)
continue;
if (cp->nzones < 0) {
dmi = &cp->continent->menu[cp->continent->nitems];
memset(dmi, 0, sizeof *dmi);
asprintf(&dmi->prompt, "%d",
++cp->continent->nitems);
dmi->title = cp->name;
dmi->checked = 0;
dmi->fire = set_zone_whole_country;
dmi->selected = 0;
dmi->data = cp;
} else {
cp->submenu = malloc(cp->nzones * sizeof *dmi);
if (cp->submenu == 0)
err(1, "malloc for submenu");
cp->nzones = 0;
for (zp = cp->zones.tqh_first; zp;
zp = zp->link.tqe_next) {
cont = zp->continent;
dmi = &cp->submenu[cp->nzones];
memset(dmi, 0, sizeof *dmi);
asprintf(&dmi->prompt, "%d",
++cp->nzones);
dmi->title = zp->descr;
dmi->checked = 0;
dmi->fire = set_zone_multi;
dmi->selected = 0;
dmi->data = zp;
for (zp2 = cp->zones.tqh_first;
zp2->continent != cont;
zp2 = zp2->link.tqe_next)
;
if (zp2 != zp)
continue;
dmi = &cont->menu[cont->nitems];
memset(dmi, 0, sizeof *dmi);
asprintf(&dmi->prompt, "%d", ++cont->nitems);
dmi->title = cp->name;
dmi->checked = 0;
dmi->fire = set_zone_menu;
dmi->selected = 0;
dmi->data = cp;
}
}
}
}
static int
set_zone_menu(dialogMenuItem *dmi)
{
int rv;
char buf[256];
struct country *cp = dmi->data;
int menulen;
snprintf(buf, sizeof buf, "%s Time Zones", cp->name);
menulen = cp->nzones < 16 ? cp->nzones : 16;
rv = dialog_menu(buf, "Select a zone which observes the same time as "
"your locality.", -1, -1, menulen, -cp->nzones,
cp->submenu, 0, 0, 0);
if (rv != 0)
return DITEM_RECREATE;
return DITEM_LEAVE_MENU;
}
static int
install_zone_file(const char *filename)
{
struct stat sb;
int fd1, fd2;
int copymode;
char *msg;
ssize_t len;
char buf[1024];
if (lstat(_PATH_LOCALTIME, &sb) < 0)
/* Nothing there yet... */
copymode = 1;
else if(S_ISLNK(sb.st_mode))
copymode = 0;
else
copymode = 1;
#ifdef VERBOSE
if (copymode)
asprintf(&msg, "Copying %s to " _PATH_LOCALTIME, filename);
else
asprintf(&msg, "Creating symbolic link " _PATH_LOCALTIME
" to %s", filename);
dialog_notify(msg);
free(msg);
#endif
if (reallydoit) {
if (copymode) {
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;
}
}
}
#ifdef VERBOSE
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);
#endif
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;
}
static void
usage()
{
fprintf(stderr, "usage: tzsetup [-n]\n");
exit(1);
}
int
main(int argc, char **argv)
{
int c, fd;
while ((c = getopt(argc, argv, "n")) != -1) {
switch(c) {
case 'n':
reallydoit = 0;
break;
default:
usage();
}
}
if (argc - optind > 1)
usage();
read_iso3166_table();
read_zones();
sort_countries();
make_menus();
init_dialog();
if (!dialog_yesno("Select local or UTC (Greenwich Mean Time) clock",
"Is this machine's CMOS clock set to UTC? If it is set to local time,\n"
"please choose NO here!", 7, 72)) {
if (reallydoit)
unlink(_PATH_WALL_CMOS_CLOCK);
} else {
if (reallydoit) {
fd = open(_PATH_WALL_CMOS_CLOCK,
O_WRONLY|O_CREAT|O_TRUNC, 0666);
if (fd < 0)
err(1, "create %s", _PATH_WALL_CMOS_CLOCK);
close(fd);
}
}
dialog_clear_norefresh();
if (optind == argc - 1) {
char *msg;
asprintf(&msg, "\nUse the default `%s' zone?", argv[optind]);
if (!dialog_yesno("Default timezone provided", msg, 7, 72)) {
install_zone_file(argv[optind]);
dialog_clear();
end_dialog();
return 0;
}
free(msg);
dialog_clear_norefresh();
}
dialog_menu("Time Zone Selector", "Select a region", -1, -1,
NCONTINENTS, -NCONTINENTS, continents, 0, NULL, NULL);
dialog_clear();
end_dialog();
return 0;
}
