*
* Copyright (C) 2002 Robert Griebl <griebl@gmx.de>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
+#include <sys/ioctl.h>
#include <sys/utsname.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <string.h>
#include <ctype.h>
#include <fcntl.h>
-#include <sys/time.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
#include <time.h>
-#include <linux/rtc.h>
-#include <sys/ioctl.h>
+#include <unistd.h>
#include "busybox.h"
-#ifdef CONFIG_FEATURE_HWCLOCK_LONGOPTIONS
+/* Copied from linux/rtc.h to eliminate the kernel dependency */
+struct linux_rtc_time {
+ int tm_sec;
+ int tm_min;
+ int tm_hour;
+ int tm_mday;
+ int tm_mon;
+ int tm_year;
+ int tm_wday;
+ int tm_yday;
+ int tm_isdst;
+};
+
+#define RTC_SET_TIME _IOW('p', 0x0a, struct linux_rtc_time) /* Set RTC time */
+#define RTC_RD_TIME _IOR('p', 0x09, struct linux_rtc_time) /* Read RTC time */
+
+#if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
# ifndef _GNU_SOURCE
# define _GNU_SOURCE
# endif
#endif
-#include <getopt.h>
-
-
-enum OpMode {
- SHOW,
- SYSTOHC,
- HCTOSYS
-};
-
-
-time_t read_rtc ( int utc )
+static time_t read_rtc(int utc)
{
int rtc;
struct tm tm;
if (( rtc = open ( "/dev/rtc", O_RDONLY )) < 0 ) {
if (( rtc = open ( "/dev/misc/rtc", O_RDONLY )) < 0 )
- perror_msg_and_die ( "Could not access RTC" );
+ bb_perror_msg_and_die ( "Could not access RTC" );
}
- memset ( &tm, 0, sizeof( struct tm ));
+ memset ( &tm, 0, sizeof( struct tm ));
if ( ioctl ( rtc, RTC_RD_TIME, &tm ) < 0 )
- perror_msg_and_die ( "Could not read time from RTC" );
- tm. tm_isdst = -1; // not known
-
+ bb_perror_msg_and_die ( "Could not read time from RTC" );
+ tm.tm_isdst = -1; /* not known */
+
close ( rtc );
- if ( utc ) {
+ if ( utc ) {
oldtz = getenv ( "TZ" );
setenv ( "TZ", "UTC 0", 1 );
tzset ( );
}
-
+
t = mktime ( &tm );
-
+
if ( utc ) {
if ( oldtz )
setenv ( "TZ", oldtz, 1 );
return t;
}
-void write_rtc ( time_t t, int utc )
+static void write_rtc(time_t t, int utc)
{
int rtc;
struct tm tm;
if (( rtc = open ( "/dev/rtc", O_WRONLY )) < 0 ) {
if (( rtc = open ( "/dev/misc/rtc", O_WRONLY )) < 0 )
- perror_msg_and_die ( "Could not access RTC" );
+ bb_perror_msg_and_die ( "Could not access RTC" );
}
-
- printf ( "1\n" );
-
+
tm = *( utc ? gmtime ( &t ) : localtime ( &t ));
- tm. tm_isdst = 0;
-
- printf ( "2\n") ;
-
+ tm.tm_isdst = 0;
+
if ( ioctl ( rtc, RTC_SET_TIME, &tm ) < 0 )
- perror_msg_and_die ( "Could not set the RTC time" );
-
+ bb_perror_msg_and_die ( "Could not set the RTC time" );
+
close ( rtc );
}
-int show_clock ( int utc )
+static int show_clock(int utc)
{
struct tm *ptm;
time_t t;
- char buffer [64];
+ RESERVE_CONFIG_BUFFER(buffer, 64);
- t = read_rtc ( utc );
+ t = read_rtc ( utc );
ptm = localtime ( &t ); /* Sets 'tzname[]' */
-
- safe_strncpy ( buffer, ctime ( &t ), sizeof( buffer ));
+
+ safe_strncpy ( buffer, ctime ( &t ), 64);
if ( buffer [0] )
- buffer [xstrlen ( buffer ) - 1] = 0;
-
+ buffer [strlen ( buffer ) - 1] = 0;
+
//printf ( "%s %.6f seconds %s\n", buffer, 0.0, utc ? "" : ( ptm-> tm_isdst ? tzname [1] : tzname [0] ));
printf ( "%s %.6f seconds\n", buffer, 0.0 );
-
+ RELEASE_CONFIG_BUFFER(buffer);
+
return 0;
}
-int to_sys_clock ( int utc )
+static int to_sys_clock(int utc)
{
struct timeval tv = { 0, 0 };
const struct timezone tz = { timezone/60 - 60*daylight, 0 };
-
- tv. tv_sec = read_rtc ( utc );
+
+ tv.tv_sec = read_rtc ( utc );
if ( settimeofday ( &tv, &tz ))
- perror_msg_and_die ( "settimeofday() failed" );
+ bb_perror_msg_and_die ( "settimeofday() failed" );
return 0;
}
-int from_sys_clock ( int utc )
+static int from_sys_clock(int utc)
{
struct timeval tv = { 0, 0 };
struct timezone tz = { 0, 0 };
if ( gettimeofday ( &tv, &tz ))
- perror_msg_and_die ( "gettimeofday() failed" );
+ bb_perror_msg_and_die ( "gettimeofday() failed" );
- write_rtc ( tv. tv_sec, utc );
+ write_rtc ( tv.tv_sec, utc );
return 0;
}
-
-int check_utc ( void )
+#ifdef CONFIG_FEATURE_HWCLOCK_ADJTIME_FHS
+# define ADJTIME_PATH "/var/lib/hwclock/adjtime"
+#else
+# define ADJTIME_PATH "/etc/adjtime"
+#endif
+static int check_utc(void)
{
int utc = 0;
- FILE *f = fopen ( "/etc/adjtime", "r" );
-
+ FILE *f = fopen ( ADJTIME_PATH, "r" );
+
if ( f ) {
- char buffer [128];
-
+ RESERVE_CONFIG_BUFFER(buffer, 128);
+
while ( fgets ( buffer, sizeof( buffer ), f )) {
- int len = xstrlen ( buffer );
-
+ int len = strlen ( buffer );
+
while ( len && isspace ( buffer [len - 1] ))
len--;
-
+
buffer [len] = 0;
-
+
if ( strncmp ( buffer, "UTC", 3 ) == 0 ) {
utc = 1;
break;
}
}
fclose ( f );
+ RELEASE_CONFIG_BUFFER(buffer);
}
return utc;
}
-extern int hwclock_main ( int argc, char **argv )
+#define HWCLOCK_OPT_LOCALTIME 0x01
+#define HWCLOCK_OPT_UTC 0x02
+#define HWCLOCK_OPT_SHOW 0x04
+#define HWCLOCK_OPT_HCTOSYS 0x08
+#define HWCLOCK_OPT_SYSTOHC 0x10
+
+int hwclock_main ( int argc, char **argv )
{
- int opt;
- enum OpMode mode = SHOW;
- int utc = 0;
- int utc_arg = 0;
+ unsigned long opt;
+ int utc;
-#ifdef CONFIG_FEATURE_HWCLOCK_LONGOPTIONS
- struct option long_options[] = {
- { "show", 0, 0, 'r' },
- { "utc", 0, 0, 'u' },
+#if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
+static const struct option hwclock_long_options[] = {
{ "localtime", 0, 0, 'l' },
+ { "utc", 0, 0, 'u' },
+ { "show", 0, 0, 'r' },
{ "hctosys", 0, 0, 's' },
{ "systohc", 0, 0, 'w' },
{ 0, 0, 0, 0 }
};
-
- while (( opt = getopt_long ( argc, argv, "rwsul", long_options, 0 )) != EOF ) {
-#else
- while (( opt = getopt ( argc, argv, "rwsul" )) != EOF ) {
+ bb_applet_long_options = hwclock_long_options;
#endif
- switch ( opt ) {
- case 'r':
- mode = SHOW;
- break;
- case 'w':
- mode = SYSTOHC;
- break;
- case 's':
- mode = HCTOSYS;
- break;
- case 'u':
- utc = 1;
- utc_arg = 1;
- break;
- case 'l': // -l is not supported by the normal hwclock (only --localtime)
- utc = 0;
- utc_arg = 1;
- break;
- default:
- show_usage();
- break;
- }
- }
- if ( !utc_arg )
- utc = check_utc ( );
-
- switch ( mode ) {
- case SYSTOHC:
- return from_sys_clock ( utc );
+ bb_opt_complementally = "?:r--ws:w--rs:s--wr:l--u:u--l";
+ opt = bb_getopt_ulflags(argc, argv, "lursw");
- case HCTOSYS:
- return to_sys_clock ( utc );
+ /* If -u or -l wasn't given check if we are using utc */
+ if (opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME))
+ utc = opt & HWCLOCK_OPT_UTC;
+ else
+ utc = check_utc();
- case SHOW:
- default:
- return show_clock ( utc );
- }
+ if (opt & HWCLOCK_OPT_HCTOSYS) {
+ return to_sys_clock ( utc );
+ }
+ else if (opt & HWCLOCK_OPT_SYSTOHC) {
+ return from_sys_clock ( utc );
+ } else {
+ /* default HWCLOCK_OPT_SHOW */
+ return show_clock ( utc );
+ }
}
-
-
projects / oweals / busybox.git / blobdiff