tzsetup.c revision 322375 
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: stable/11/usr.sbin/tzsetup/tzsetup.c 322375 2017-08-10 21:39:10Z marius $");
37
38#include <err.h>
39#include <errno.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <time.h>
44#include <unistd.h>
45
46#include <sys/fcntl.h>
47#include <sys/param.h>
48#include <sys/queue.h>
49#include <sys/stat.h>
50#include <sys/sysctl.h>
51
52#ifdef HAVE_DIALOG
53#include <dialog.h>
54#endif
55
56#define	_PATH_ZONETAB		"/usr/share/zoneinfo/zone.tab"
57#define	_PATH_ISO3166		"/usr/share/misc/iso3166"
58#define	_PATH_ZONEINFO		"/usr/share/zoneinfo"
59#define	_PATH_LOCALTIME		"/etc/localtime"
60#define	_PATH_DB		"/var/db/zoneinfo"
61#define	_PATH_WALL_CMOS_CLOCK	"/etc/wall_cmos_clock"
62
63#ifdef PATH_MAX
64#define	SILLY_BUFFER_SIZE	2*PATH_MAX
65#else
66#warning "Somebody needs to fix this to dynamically size this buffer."
67#define	SILLY_BUFFER_SIZE	2048
68#endif
69
70/* special return codes for `fire' actions */
71#define DITEM_FAILURE           1
72
73/* flags - returned in upper 16 bits of return status */
74#define DITEM_LEAVE_MENU        (1 << 16)
75#define DITEM_RECREATE          (1 << 18)
76
77static char	path_zonetab[MAXPATHLEN], path_iso3166[MAXPATHLEN],
78		path_zoneinfo[MAXPATHLEN], path_localtime[MAXPATHLEN],
79		path_db[MAXPATHLEN], path_wall_cmos_clock[MAXPATHLEN];
80
81static int reallydoit = 1;
82static int reinstall = 0;
83static char *chrootenv = NULL;
84
85static void	usage(void);
86static int	install_zoneinfo(const char *zoneinfo);
87static int	install_zoneinfo_file(const char *zoneinfo_file);
88
89#ifdef HAVE_DIALOG
90/* for use in describing more exotic behaviors */
91typedef struct dialogMenuItem {
92	char *prompt;
93	char *title;
94	int (*fire)(struct dialogMenuItem *self);
95	void *data;
96} dialogMenuItem;
97
98static int
99xdialog_count_rows(const char *p)
100{
101	int rows = 0;
102
103	while ((p = strchr(p, '\n')) != NULL) {
104		p++;
105		if (*p == '\0')
106			break;
107		rows++;
108	}
109
110	return (rows ? rows : 1);
111}
112
113static int
114xdialog_count_columns(const char *p)
115{
116	int len;
117	int max_len = 0;
118	const char *q;
119
120	for (; (q = strchr(p, '\n')) != NULL; p = q + 1) {
121		len = q - p;
122		max_len = MAX(max_len, len);
123	}
124
125	len = strlen(p);
126	max_len = MAX(max_len, len);
127	return (max_len);
128}
129
130static int
131xdialog_menu(const char *title, const char *cprompt, int height, int width,
132	     int menu_height, int item_no, dialogMenuItem *ditems)
133{
134	int i, result, choice = 0;
135	DIALOG_LISTITEM *listitems;
136	DIALOG_VARS save_vars;
137
138	dlg_save_vars(&save_vars);
139
140	/* initialize list items */
141	listitems = dlg_calloc(DIALOG_LISTITEM, item_no + 1);
142	assert_ptr(listitems, "xdialog_menu");
143	for (i = 0; i < item_no; i++) {
144		listitems[i].name = ditems[i].prompt;
145		listitems[i].text = ditems[i].title;
146	}
147
148	/* calculate height */
149	if (height < 0)
150		height = xdialog_count_rows(cprompt) + menu_height + 4 + 2;
151	if (height > LINES)
152		height = LINES;
153
154	/* calculate width */
155	if (width < 0) {
156		int tag_x = 0;
157
158		for (i = 0; i < item_no; i++) {
159			int j, l;
160
161			l = strlen(listitems[i].name);
162			for (j = 0; j < item_no; j++) {
163				int k = strlen(listitems[j].text);
164				tag_x = MAX(tag_x, l + k + 2);
165			}
166		}
167		width = MAX(xdialog_count_columns(cprompt), title != NULL ?
168		    xdialog_count_columns(title) : 0);
169		width = MAX(width, tag_x + 4) + 4;
170	}
171	width = MAX(width, 24);
172	if (width > COLS)
173		width = COLS;
174
175again:
176	dialog_vars.default_item = listitems[choice].name;
177	result = dlg_menu(title, cprompt, height, width,
178	    menu_height, item_no, listitems, &choice, NULL);
179	switch (result) {
180	case DLG_EXIT_ESC:
181		result = -1;
182		break;
183	case DLG_EXIT_OK:
184		if (ditems[choice].fire != NULL) {
185			int status;
186
187			status = ditems[choice].fire(ditems + choice);
188			if (status & DITEM_RECREATE) {
189				dlg_clear();
190				goto again;
191			}
192		}
193		result = 0;
194		break;
195	case DLG_EXIT_CANCEL:
196	default:
197		result = 1;
198		break;
199	}
200
201	free(listitems);
202	dlg_restore_vars(&save_vars);
203	return (result);
204}
205
206static int usedialog = 1;
207
208static int	confirm_zone(const char *filename);
209static int	continent_country_menu(dialogMenuItem *);
210static int	set_zone_multi(dialogMenuItem *);
211static int	set_zone_whole_country(dialogMenuItem *);
212static int	set_zone_menu(dialogMenuItem *);
213static int	set_zone_utc(void);
214
215struct continent {
216	dialogMenuItem *menu;
217	int		nitems;
218};
219
220static struct continent	africa, america, antarctica, arctic, asia, atlantic;
221static struct continent	australia, europe, indian, pacific, utc;
222
223static struct continent_names {
224	const char	*name;
225	struct continent *continent;
226} continent_names[] = {
227	{ "Africa",	&africa },
228	{ "America",	&america },
229	{ "Antarctica",	&antarctica },
230	{ "Arctic",	&arctic },
231	{ "Asia",	&asia },
232	{ "Atlantic",	&atlantic },
233	{ "Australia",	&australia },
234	{ "Europe",	&europe },
235	{ "Indian",	&indian },
236	{ "Pacific",	&pacific },
237	{ "UTC",	&utc }
238};
239
240static struct continent_items {
241	char		prompt[2];
242	char		title[30];
243} continent_items[] = {
244	{ "1",	"Africa" },
245	{ "2",	"America -- North and South" },
246	{ "3",	"Antarctica" },
247	{ "4",	"Arctic Ocean" },
248	{ "5",	"Asia" },
249	{ "6",	"Atlantic Ocean" },
250	{ "7",	"Australia" },
251	{ "8",	"Europe" },
252	{ "9",	"Indian Ocean" },
253	{ "0",	"Pacific Ocean" },
254	{ "a",	"UTC" }
255};
256
257#define	NCONTINENTS	\
258    (int)((sizeof(continent_items)) / (sizeof(continent_items[0])))
259static dialogMenuItem continents[NCONTINENTS];
260
261#define	OCEANP(x)	((x) == 3 || (x) == 5 || (x) == 8 || (x) == 9)
262
263static int
264continent_country_menu(dialogMenuItem *continent)
265{
266	char		title[64], prompt[64];
267	struct continent *contp = continent->data;
268	int		isocean = OCEANP(continent - continents);
269	int		menulen;
270	int		rv;
271
272	if (strcmp(continent->title, "UTC") == 0)
273		return (set_zone_utc());
274
275	/* Short cut -- if there's only one country, don't post a menu. */
276	if (contp->nitems == 1)
277		return (contp->menu[0].fire(&contp->menu[0]));
278
279	/* It's amazing how much good grammar really matters... */
280	if (!isocean) {
281		snprintf(title, sizeof(title), "Countries in %s",
282		    continent->title);
283		snprintf(prompt, sizeof(prompt), "Select a country or region");
284	} else {
285		snprintf(title, sizeof(title), "Islands and groups in the %s",
286		    continent->title);
287		snprintf(prompt, sizeof(prompt), "Select an island or group");
288	}
289
290	menulen = contp->nitems < 16 ? contp->nitems : 16;
291	rv = xdialog_menu(title, prompt, -1, -1, menulen, contp->nitems,
292	    contp->menu);
293	if (rv == 0)
294		return (DITEM_LEAVE_MENU);
295	return (DITEM_RECREATE);
296}
297
298static struct continent *
299find_continent(const char *name)
300{
301	int		i;
302
303	for (i = 0; i < NCONTINENTS; i++)
304		if (strcmp(name, continent_names[i].name) == 0)
305			return (continent_names[i].continent);
306	return (0);
307}
308
309struct country {
310	char		*name;
311	char		*tlc;
312	int		nzones;
313	char		*filename;	/* use iff nzones < 0 */
314	struct continent *continent;	/* use iff nzones < 0 */
315	TAILQ_HEAD(, zone) zones;	/* use iff nzones > 0 */
316	dialogMenuItem	*submenu;	/* use iff nzones > 0 */
317};
318
319struct zone {
320	TAILQ_ENTRY(zone) link;
321	char		*descr;
322	char		*filename;
323	struct continent *continent;
324};
325
326/*
327 * This is the easiest organization... we use ISO 3166 country codes,
328 * of the two-letter variety, so we just size this array to suit.
329 * Beats worrying about dynamic allocation.
330 */
331#define	NCOUNTRIES	(26 * 26)
332static struct country countries[NCOUNTRIES];
333
334#define	CODE2INT(s)	((s[0] - 'A') * 26 + (s[1] - 'A'))
335
336/*
337 * Read the ISO 3166 country code database in _PATH_ISO3166
338 * (/usr/share/misc/iso3166).  On error, exit via err(3).
339 */
340static void
341read_iso3166_table(void)
342{
343	FILE		*fp;
344	struct country	*cp;
345	size_t		len;
346	char		*s, *t, *name;
347	int		lineno;
348
349	fp = fopen(path_iso3166, "r");
350	if (!fp)
351		err(1, "%s", path_iso3166);
352	lineno = 0;
353
354	while ((s = fgetln(fp, &len)) != NULL) {
355		lineno++;
356		if (s[len - 1] != '\n')
357			errx(1, "%s:%d: invalid format", path_iso3166, lineno);
358		s[len - 1] = '\0';
359		if (s[0] == '#' || strspn(s, " \t") == len - 1)
360			continue;
361
362		/* Isolate the two-letter code. */
363		t = strsep(&s, "\t");
364		if (t == NULL || strlen(t) != 2)
365			errx(1, "%s:%d: invalid format", path_iso3166, lineno);
366		if (t[0] < 'A' || t[0] > 'Z' || t[1] < 'A' || t[1] > 'Z')
367			errx(1, "%s:%d: invalid code `%s'", path_iso3166,
368			    lineno, t);
369
370		/* Now skip past the three-letter and numeric codes. */
371		name = strsep(&s, "\t");	/* 3-let */
372		if (name == NULL || strlen(name) != 3)
373			errx(1, "%s:%d: invalid format", path_iso3166, lineno);
374		name = strsep(&s, "\t");	/* numeric */
375		if (name == NULL || strlen(name) != 3)
376			errx(1, "%s:%d: invalid format", path_iso3166, lineno);
377
378		name = s;
379
380		cp = &countries[CODE2INT(t)];
381		if (cp->name)
382			errx(1, "%s:%d: country code `%s' multiply defined: %s",
383			    path_iso3166, lineno, t, cp->name);
384		cp->name = strdup(name);
385		if (cp->name == NULL)
386			errx(1, "malloc failed");
387		cp->tlc = strdup(t);
388		if (cp->tlc == NULL)
389			errx(1, "malloc failed");
390	}
391
392	fclose(fp);
393}
394
395static void
396add_zone_to_country(int lineno, const char *tlc, const char *descr,
397    const char *file, struct continent *cont)
398{
399	struct zone	*zp;
400	struct country	*cp;
401
402	if (tlc[0] < 'A' || tlc[0] > 'Z' || tlc[1] < 'A' || tlc[1] > 'Z')
403		errx(1, "%s:%d: country code `%s' invalid", path_zonetab,
404		    lineno, tlc);
405
406	cp = &countries[CODE2INT(tlc)];
407	if (cp->name == 0)
408		errx(1, "%s:%d: country code `%s' unknown", path_zonetab,
409		    lineno, tlc);
410
411	if (descr) {
412		if (cp->nzones < 0)
413			errx(1, "%s:%d: conflicting zone definition",
414			    path_zonetab, lineno);
415
416		zp = malloc(sizeof(*zp));
417		if (zp == NULL)
418			errx(1, "malloc(%zu)", sizeof(*zp));
419
420		if (cp->nzones == 0)
421			TAILQ_INIT(&cp->zones);
422
423		zp->descr = strdup(descr);
424		if (zp->descr == NULL)
425			errx(1, "malloc failed");
426		zp->filename = strdup(file);
427		if (zp->filename == NULL)
428			errx(1, "malloc failed");
429		zp->continent = cont;
430		TAILQ_INSERT_TAIL(&cp->zones, zp, link);
431		cp->nzones++;
432	} else {
433		if (cp->nzones > 0)
434			errx(1, "%s:%d: zone must have description",
435			    path_zonetab, lineno);
436		if (cp->nzones < 0)
437			errx(1, "%s:%d: zone multiply defined",
438			    path_zonetab, lineno);
439		cp->nzones = -1;
440		cp->filename = strdup(file);
441		if (cp->filename == NULL)
442			errx(1, "malloc failed");
443		cp->continent = cont;
444	}
445}
446
447/*
448 * This comparison function intentionally sorts all of the null-named
449 * ``countries''---i.e., the codes that don't correspond to a real
450 * country---to the end.  Everything else is lexical by country name.
451 */
452static int
453compare_countries(const void *xa, const void *xb)
454{
455	const struct country *a = xa, *b = xb;
456
457	if (a->name == 0 && b->name == 0)
458		return (0);
459	if (a->name == 0 && b->name != 0)
460		return (1);
461	if (b->name == 0)
462		return (-1);
463
464	return (strcmp(a->name, b->name));
465}
466
467/*
468 * This must be done AFTER all zone descriptions are read, since it breaks
469 * CODE2INT().
470 */
471static void
472sort_countries(void)
473{
474
475	qsort(countries, NCOUNTRIES, sizeof(countries[0]), compare_countries);
476}
477
478static void
479read_zones(void)
480{
481	char		contbuf[16];
482	FILE		*fp;
483	struct continent *cont;
484	size_t		len;
485	char		*line, *tlc, *file, *descr, *p;
486	int		lineno;
487
488	fp = fopen(path_zonetab, "r");
489	if (!fp)
490		err(1, "%s", path_zonetab);
491	lineno = 0;
492
493	while ((line = fgetln(fp, &len)) != NULL) {
494		lineno++;
495		if (line[len - 1] != '\n')
496			errx(1, "%s:%d: invalid format", path_zonetab, lineno);
497		line[len - 1] = '\0';
498		if (line[0] == '#')
499			continue;
500
501		tlc = strsep(&line, "\t");
502		if (strlen(tlc) != 2)
503			errx(1, "%s:%d: invalid country code `%s'",
504			    path_zonetab, lineno, tlc);
505		/* coord = */ strsep(&line, "\t");	 /* Unused */
506		file = strsep(&line, "\t");
507		p = strchr(file, '/');
508		if (p == NULL)
509			errx(1, "%s:%d: invalid zone name `%s'", path_zonetab,
510			    lineno, file);
511		contbuf[0] = '\0';
512		strncat(contbuf, file, p - file);
513		cont = find_continent(contbuf);
514		if (!cont)
515			errx(1, "%s:%d: invalid region `%s'", path_zonetab,
516			    lineno, contbuf);
517
518		descr = (line != NULL && *line != '\0') ? line : NULL;
519
520		add_zone_to_country(lineno, tlc, descr, file, cont);
521	}
522	fclose(fp);
523}
524
525static void
526make_menus(void)
527{
528	struct country	*cp;
529	struct zone	*zp, *zp2;
530	struct continent *cont;
531	dialogMenuItem	*dmi;
532	int		i;
533
534	/*
535	 * First, count up all the countries in each continent/ocean.
536	 * Be careful to count those countries which have multiple zones
537	 * only once for each.  NB: some countries are in multiple
538	 * continents/oceans.
539	 */
540	for (cp = countries; cp->name; cp++) {
541		if (cp->nzones == 0)
542			continue;
543		if (cp->nzones < 0) {
544			cp->continent->nitems++;
545		} else {
546			TAILQ_FOREACH(zp, &cp->zones, link) {
547				cont = zp->continent;
548				for (zp2 = TAILQ_FIRST(&cp->zones);
549				    zp2->continent != cont;
550				    zp2 = TAILQ_NEXT(zp2, link))
551					;
552				if (zp2 == zp)
553					zp->continent->nitems++;
554			}
555		}
556	}
557
558	/*
559	 * Now allocate memory for the country menus and initialize
560	 * continent menus.  We set nitems back to zero so that we can
561	 * use it for counting again when we actually build the menus.
562	 */
563	memset(continents, 0, sizeof(continents));
564	for (i = 0; i < NCONTINENTS; i++) {
565		continent_names[i].continent->menu =
566		    malloc(sizeof(dialogMenuItem) *
567		    continent_names[i].continent->nitems);
568		if (continent_names[i].continent->menu == NULL)
569			errx(1, "malloc for continent menu");
570		continent_names[i].continent->nitems = 0;
571		continents[i].prompt = continent_items[i].prompt;
572		continents[i].title = continent_items[i].title;
573		continents[i].fire = continent_country_menu;
574		continents[i].data = continent_names[i].continent;
575	}
576
577	/*
578	 * Now that memory is allocated, create the menu items for
579	 * each continent.  For multiple-zone countries, also create
580	 * the country's zone submenu.
581	 */
582	for (cp = countries; cp->name; cp++) {
583		if (cp->nzones == 0)
584			continue;
585		if (cp->nzones < 0) {
586			dmi = &cp->continent->menu[cp->continent->nitems];
587			memset(dmi, 0, sizeof(*dmi));
588			asprintf(&dmi->prompt, "%d", ++cp->continent->nitems);
589			dmi->title = cp->name;
590			dmi->fire = set_zone_whole_country;
591			dmi->data = cp;
592		} else {
593			cp->submenu = malloc(cp->nzones * sizeof(*dmi));
594			if (cp->submenu == 0)
595				errx(1, "malloc for submenu");
596			cp->nzones = 0;
597			TAILQ_FOREACH(zp, &cp->zones, link) {
598				cont = zp->continent;
599				dmi = &cp->submenu[cp->nzones];
600				memset(dmi, 0, sizeof(*dmi));
601				asprintf(&dmi->prompt, "%d", ++cp->nzones);
602				dmi->title = zp->descr;
603				dmi->fire = set_zone_multi;
604				dmi->data = zp;
605
606				for (zp2 = TAILQ_FIRST(&cp->zones);
607				    zp2->continent != cont;
608				    zp2 = TAILQ_NEXT(zp2, link))
609					;
610				if (zp2 != zp)
611					continue;
612
613				dmi = &cont->menu[cont->nitems];
614				memset(dmi, 0, sizeof(*dmi));
615				asprintf(&dmi->prompt, "%d", ++cont->nitems);
616				dmi->title = cp->name;
617				dmi->fire = set_zone_menu;
618				dmi->data = cp;
619			}
620		}
621	}
622}
623
624static int
625set_zone_menu(dialogMenuItem *dmi)
626{
627	char		title[64], prompt[64];
628	struct country	*cp = dmi->data;
629	int		menulen;
630	int		rv;
631
632	snprintf(title, sizeof(title), "%s Time Zones", cp->name);
633	snprintf(prompt, sizeof(prompt),
634	    "Select a zone which observes the same time as your locality.");
635	menulen = cp->nzones < 16 ? cp->nzones : 16;
636	rv = xdialog_menu(title, prompt, -1, -1, menulen, cp->nzones,
637	    cp->submenu);
638	if (rv != 0)
639		return (DITEM_RECREATE);
640	return (DITEM_LEAVE_MENU);
641}
642
643static int
644set_zone_utc(void)
645{
646	if (!confirm_zone("UTC"))
647		return (DITEM_FAILURE | DITEM_RECREATE);
648
649	return (install_zoneinfo("UTC"));
650}
651
652static int
653confirm_zone(const char *filename)
654{
655	char		title[64], prompt[64];
656	time_t		t = time(0);
657	struct tm	*tm;
658	int		rv;
659
660	setenv("TZ", filename, 1);
661	tzset();
662	tm = localtime(&t);
663
664	snprintf(title, sizeof(title), "Confirmation");
665	snprintf(prompt, sizeof(prompt),
666	    "Does the abbreviation `%s' look reasonable?", tm->tm_zone);
667	rv = !dialog_yesno(title, prompt, 5, 72);
668	return (rv);
669}
670
671static int
672set_zone_multi(dialogMenuItem *dmi)
673{
674	struct zone	*zp = dmi->data;
675	int		rv;
676
677	if (!confirm_zone(zp->filename))
678		return (DITEM_FAILURE | DITEM_RECREATE);
679
680	rv = install_zoneinfo(zp->filename);
681	return (rv);
682}
683
684static int
685set_zone_whole_country(dialogMenuItem *dmi)
686{
687	struct country	*cp = dmi->data;
688	int		rv;
689
690	if (!confirm_zone(cp->filename))
691		return (DITEM_FAILURE | DITEM_RECREATE);
692
693	rv = install_zoneinfo(cp->filename);
694	return (rv);
695}
696
697#endif
698
699static int
700install_zoneinfo_file(const char *zoneinfo_file)
701{
702	char		buf[1024];
703	char		title[64], prompt[SILLY_BUFFER_SIZE];
704	struct stat	sb;
705	ssize_t		len;
706	int		fd1, fd2, copymode;
707
708	if (lstat(path_localtime, &sb) < 0) {
709		/* Nothing there yet... */
710		copymode = 1;
711	} else if (S_ISLNK(sb.st_mode))
712		copymode = 0;
713	else
714		copymode = 1;
715
716#ifdef VERBOSE
717	snprintf(title, sizeof(title), "Info");
718	if (copymode)
719		snprintf(prompt, sizeof(prompt),
720		    "Copying %s to %s", zoneinfo_file, path_localtime);
721	else
722		snprintf(prompt, sizeof(prompt),
723		    "Creating symbolic link %s to %s",
724		    path_localtime, zoneinfo_file);
725#ifdef HAVE_DIALOG
726	if (usedialog)
727		dialog_msgbox(title, prompt, 8, 72, 1);
728	else
729#endif
730		fprintf(stderr, "%s\n", prompt);
731#endif
732
733	if (reallydoit) {
734		if (copymode) {
735			fd1 = open(zoneinfo_file, O_RDONLY, 0);
736			if (fd1 < 0) {
737				snprintf(title, sizeof(title), "Error");
738				snprintf(prompt, sizeof(prompt),
739				    "Could not open %s: %s", zoneinfo_file,
740				    strerror(errno));
741#ifdef HAVE_DIALOG
742				if (usedialog)
743					dialog_msgbox(title, prompt, 8, 72, 1);
744				else
745#endif
746					fprintf(stderr, "%s\n", prompt);
747				return (DITEM_FAILURE | DITEM_RECREATE);
748			}
749
750			if (unlink(path_localtime) < 0 && errno != ENOENT) {
751				snprintf(prompt, sizeof(prompt),
752				    "Could not delete %s: %s",
753				    path_localtime, strerror(errno));
754#ifdef HAVE_DIALOG
755				if (usedialog) {
756					snprintf(title, sizeof(title), "Error");
757					dialog_msgbox(title, prompt, 8, 72, 1);
758				} else
759#endif
760					fprintf(stderr, "%s\n", prompt);
761				return (DITEM_FAILURE | DITEM_RECREATE);
762			}
763
764			fd2 = open(path_localtime, O_CREAT | O_EXCL | O_WRONLY,
765			    S_IRUSR | S_IRGRP | S_IROTH);
766			if (fd2 < 0) {
767				snprintf(title, sizeof(title), "Error");
768				snprintf(prompt, sizeof(prompt),
769				    "Could not open %s: %s",
770				    path_localtime, strerror(errno));
771#ifdef HAVE_DIALOG
772				if (usedialog)
773					dialog_msgbox(title, prompt, 8, 72, 1);
774				else
775#endif
776					fprintf(stderr, "%s\n", prompt);
777				return (DITEM_FAILURE | DITEM_RECREATE);
778			}
779
780			while ((len = read(fd1, buf, sizeof(buf))) > 0)
781				if ((len = write(fd2, buf, len)) < 0)
782					break;
783
784			if (len == -1) {
785				snprintf(title, sizeof(title), "Error");
786				snprintf(prompt, sizeof(prompt),
787				    "Error copying %s to %s %s", zoneinfo_file,
788				    path_localtime, strerror(errno));
789#ifdef HAVE_DIALOG
790				if (usedialog)
791					dialog_msgbox(title, prompt, 8, 72, 1);
792				else
793#endif
794					fprintf(stderr, "%s\n", prompt);
795				/* Better to leave none than a corrupt one. */
796				unlink(path_localtime);
797				return (DITEM_FAILURE | DITEM_RECREATE);
798			}
799			close(fd1);
800			close(fd2);
801		} else {
802			if (access(zoneinfo_file, R_OK) != 0) {
803				snprintf(title, sizeof(title), "Error");
804				snprintf(prompt, sizeof(prompt),
805				    "Cannot access %s: %s", zoneinfo_file,
806				    strerror(errno));
807#ifdef HAVE_DIALOG
808				if (usedialog)
809					dialog_msgbox(title, prompt, 8, 72, 1);
810				else
811#endif
812					fprintf(stderr, "%s\n", prompt);
813				return (DITEM_FAILURE | DITEM_RECREATE);
814			}
815			if (unlink(path_localtime) < 0 && errno != ENOENT) {
816				snprintf(prompt, sizeof(prompt),
817				    "Could not delete %s: %s",
818				    path_localtime, strerror(errno));
819#ifdef HAVE_DIALOG
820				if (usedialog) {
821					snprintf(title, sizeof(title), "Error");
822					dialog_msgbox(title, prompt, 8, 72, 1);
823				} else
824#endif
825					fprintf(stderr, "%s\n", prompt);
826				return (DITEM_FAILURE | DITEM_RECREATE);
827			}
828			if (symlink(zoneinfo_file, path_localtime) < 0) {
829				snprintf(title, sizeof(title), "Error");
830				snprintf(prompt, sizeof(prompt),
831				    "Cannot create symbolic link %s to %s: %s",
832				    path_localtime, zoneinfo_file,
833				    strerror(errno));
834#ifdef HAVE_DIALOG
835				if (usedialog)
836					dialog_msgbox(title, prompt, 8, 72, 1);
837				else
838#endif
839					fprintf(stderr, "%s\n", prompt);
840				return (DITEM_FAILURE | DITEM_RECREATE);
841			}
842		}
843
844#ifdef VERBOSE
845		snprintf(title, sizeof(title), "Done");
846		if (copymode)
847			snprintf(prompt, sizeof(prompt),
848			    "Copied timezone file from %s to %s",
849			    zoneinfo_file, path_localtime);
850		else
851			snprintf(prompt, sizeof(prompt),
852			    "Created symbolic link from %s to %s",
853			    zoneinfo_file, path_localtime);
854#ifdef HAVE_DIALOG
855		if (usedialog)
856			dialog_msgbox(title, prompt, 8, 72, 1);
857		else
858#endif
859			fprintf(stderr, "%s\n", prompt);
860#endif
861	} /* reallydoit */
862
863	return (DITEM_LEAVE_MENU);
864}
865
866static int
867install_zoneinfo(const char *zoneinfo)
868{
869	int		rv;
870	FILE		*f;
871	char		path_zoneinfo_file[MAXPATHLEN];
872
873	if ((size_t)snprintf(path_zoneinfo_file, sizeof(path_zoneinfo_file),
874	    "%s/%s", path_zoneinfo, zoneinfo) >= sizeof(path_zoneinfo_file))
875		errx(1, "%s/%s name too long", path_zoneinfo, zoneinfo);
876	rv = install_zoneinfo_file(path_zoneinfo_file);
877
878	/* Save knowledge for later */
879	if (reallydoit && (rv & DITEM_FAILURE) == 0) {
880		if ((f = fopen(path_db, "w")) != NULL) {
881			fprintf(f, "%s\n", zoneinfo);
882			fclose(f);
883		}
884	}
885
886	return (rv);
887}
888
889static void
890usage(void)
891{
892
893	fprintf(stderr, "usage: tzsetup [-nrs] [-C chroot_directory]"
894	    " [zoneinfo_file | zoneinfo_name]\n");
895	exit(1);
896}
897
898int
899main(int argc, char **argv)
900{
901#ifdef HAVE_DIALOG
902	char		title[64], prompt[128];
903	int		fd;
904#endif
905	int		c, rv, skiputc;
906	char		vm_guest[16] = "";
907	size_t		len = sizeof(vm_guest);
908
909	skiputc = 0;
910
911	/* Default skiputc to 1 for VM guests */
912	if (sysctlbyname("kern.vm_guest", vm_guest, &len, NULL, 0) == 0 &&
913	    strcmp(vm_guest, "none") != 0)
914		skiputc = 1;
915
916	while ((c = getopt(argc, argv, "C:nrs")) != -1) {
917		switch(c) {
918		case 'C':
919			chrootenv = optarg;
920			break;
921		case 'n':
922			reallydoit = 0;
923			break;
924		case 'r':
925			reinstall = 1;
926#ifdef HAVE_DIALOG
927			usedialog = 0;
928#endif
929			break;
930		case 's':
931			skiputc = 1;
932			break;
933		default:
934			usage();
935		}
936	}
937
938	if (argc - optind > 1)
939		usage();
940
941	if (chrootenv == NULL) {
942		strcpy(path_zonetab, _PATH_ZONETAB);
943		strcpy(path_iso3166, _PATH_ISO3166);
944		strcpy(path_zoneinfo, _PATH_ZONEINFO);
945		strcpy(path_localtime, _PATH_LOCALTIME);
946		strcpy(path_db, _PATH_DB);
947		strcpy(path_wall_cmos_clock, _PATH_WALL_CMOS_CLOCK);
948	} else {
949		sprintf(path_zonetab, "%s/%s", chrootenv, _PATH_ZONETAB);
950		sprintf(path_iso3166, "%s/%s", chrootenv, _PATH_ISO3166);
951		sprintf(path_zoneinfo, "%s/%s", chrootenv, _PATH_ZONEINFO);
952		sprintf(path_localtime, "%s/%s", chrootenv, _PATH_LOCALTIME);
953		sprintf(path_db, "%s/%s", chrootenv, _PATH_DB);
954		sprintf(path_wall_cmos_clock, "%s/%s", chrootenv,
955		    _PATH_WALL_CMOS_CLOCK);
956	}
957
958	/* Override the user-supplied umask. */
959	(void)umask(S_IWGRP | S_IWOTH);
960
961	if (reinstall == 1) {
962		FILE *f;
963		char zoneinfo[MAXPATHLEN];
964
965		if ((f = fopen(path_db, "r")) != NULL) {
966			if (fgets(zoneinfo, sizeof(zoneinfo), f) != NULL) {
967				zoneinfo[sizeof(zoneinfo) - 1] = 0;
968				if (strlen(zoneinfo) > 0) {
969					zoneinfo[strlen(zoneinfo) - 1] = 0;
970					rv = install_zoneinfo(zoneinfo);
971					exit(rv & ~DITEM_LEAVE_MENU);
972				}
973				errx(1, "Error reading %s.\n", path_db);
974			}
975			fclose(f);
976			errx(1,
977			    "Unable to determine earlier installed zoneinfo "
978			    "name. Check %s", path_db);
979		}
980		errx(1, "Cannot open %s for reading. Does it exist?", path_db);
981	}
982
983	/*
984	 * If the arguments on the command-line do not specify a file,
985	 * then interpret it as a zoneinfo name
986	 */
987	if (optind == argc - 1) {
988		struct stat sb;
989
990		if (stat(argv[optind], &sb) != 0) {
991#ifdef HAVE_DIALOG
992			usedialog = 0;
993#endif
994			rv = install_zoneinfo(argv[optind]);
995			exit(rv & ~DITEM_LEAVE_MENU);
996		}
997		/* FALLTHROUGH */
998	}
999#ifdef HAVE_DIALOG
1000
1001	read_iso3166_table();
1002	read_zones();
1003	sort_countries();
1004	make_menus();
1005
1006	init_dialog(stdin, stdout);
1007	if (skiputc == 0) {
1008		DIALOG_VARS save_vars;
1009		int yesno;
1010
1011		snprintf(title, sizeof(title),
1012		    "Select local or UTC (Greenwich Mean Time) clock");
1013		snprintf(prompt, sizeof(prompt),
1014		    "Is this machine's CMOS clock set to UTC?  "
1015		    "If it is set to local time,\n"
1016		    "or you don't know, please choose NO here!");
1017		dlg_save_vars(&save_vars);
1018#if !defined(__sparc64__)
1019		dialog_vars.defaultno = TRUE;
1020#endif
1021		yesno = dialog_yesno(title, prompt, 7, 73);
1022		dlg_restore_vars(&save_vars);
1023		if (!yesno) {
1024			if (reallydoit)
1025				unlink(path_wall_cmos_clock);
1026		} else {
1027			if (reallydoit) {
1028				fd = open(path_wall_cmos_clock,
1029				    O_WRONLY | O_CREAT | O_TRUNC,
1030				    S_IRUSR | S_IRGRP | S_IROTH);
1031				if (fd < 0) {
1032					end_dialog();
1033					err(1, "create %s",
1034					    path_wall_cmos_clock);
1035				}
1036				close(fd);
1037			}
1038		}
1039		dlg_clear();
1040	}
1041	if (optind == argc - 1) {
1042		snprintf(title, sizeof(title), "Default timezone provided");
1043		snprintf(prompt, sizeof(prompt),
1044		    "\nUse the default `%s' zone?", argv[optind]);
1045		if (!dialog_yesno(title, prompt, 7, 72)) {
1046			rv = install_zoneinfo_file(argv[optind]);
1047			dlg_clear();
1048			end_dialog();
1049			exit(rv & ~DITEM_LEAVE_MENU);
1050		}
1051		dlg_clear();
1052	}
1053	snprintf(title, sizeof(title), "Time Zone Selector");
1054	snprintf(prompt, sizeof(prompt), "Select a region");
1055	xdialog_menu(title, prompt, -1, -1, NCONTINENTS, NCONTINENTS,
1056	    continents);
1057
1058	dlg_clear();
1059	end_dialog();
1060#else
1061	usage();
1062#endif
1063	return (0);
1064}
1065