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Use chroot(2) instead of using prefixes for files.

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Previously, the code prefixes the chroot path to actual file paths to
simulate the effect.  This, however, will not work for tzset(3) which
expects the current system have a working set of timezone data files,
and that is not always the case.

This changeset simplifies the handling of paths and use an actual
chroot(2) call to implement the effect.

PR:		bin/197313
MFC after:	2 weeks
This commit is contained in:
Xin LI 2015-10-13 22:55:17 +00:00
parent 2c6fb1de80
commit a2668e8128
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=289269
1 changed files with 11 additions and 15 deletions
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26
usr.sbin/tzsetup/tzsetup.c
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@ -40,6 +40,7 @@ __FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <time.h>
#include <unistd.h>
@ -944,23 +945,18 @@ main(int argc, char **argv)
if (argc - optind > 1)
usage();
if (chrootenv == NULL) {
strcpy(path_zonetab, _PATH_ZONETAB);
strcpy(path_iso3166, _PATH_ISO3166);
strcpy(path_zoneinfo, _PATH_ZONEINFO);
strcpy(path_localtime, _PATH_LOCALTIME);
strcpy(path_db, _PATH_DB);
strcpy(path_wall_cmos_clock, _PATH_WALL_CMOS_CLOCK);
} else {
sprintf(path_zonetab, "%s/%s", chrootenv, _PATH_ZONETAB);
sprintf(path_iso3166, "%s/%s", chrootenv, _PATH_ISO3166);
sprintf(path_zoneinfo, "%s/%s", chrootenv, _PATH_ZONEINFO);
sprintf(path_localtime, "%s/%s", chrootenv, _PATH_LOCALTIME);
sprintf(path_db, "%s/%s", chrootenv, _PATH_DB);
sprintf(path_wall_cmos_clock, "%s/%s", chrootenv,
_PATH_WALL_CMOS_CLOCK);
if (chrootenv != NULL) {
rv = chroot(chrootenv);
if (rv != 0)
err(EX_OSERR, "chroot to %s", chrootenv);
}
strcpy(path_zonetab, _PATH_ZONETAB);
strcpy(path_iso3166, _PATH_ISO3166);
strcpy(path_zoneinfo, _PATH_ZONEINFO);
strcpy(path_localtime, _PATH_LOCALTIME);
strcpy(path_db, _PATH_DB);
strcpy(path_wall_cmos_clock, _PATH_WALL_CMOS_CLOCK);
/* Override the user-supplied umask. */
(void)umask(S_IWGRP | S_IWOTH);