+++ /dev/null
-/*
-From t-matsuu@protein.osaka-u.ac.jp Sat Jan 22 13:43:20 2000
-Date: Sat, 22 Jan 2000 21:42:54 +0900 (JST)
-To: Andries.Brouwer@cwi.nl
-Subject: Please merge the source for PPC
-From: MATSUURA Takanori <t-matsuu@protein.osaka-u.ac.jp>
-
-Even now, it is used clock-1.1 based source on Linux for PowerPC
-architecture, attached on this mail.
-
-Please merge this source in main util-linux source.
-
-But I'm not an author of this source, but Paul Mackerras.
-http://linuxcare.com.au/paulus/
-shows details of him.
-
-MATSUURA Takanori @ Division of Protein Chemistry,
- Institute for Protein Research, Osaka University, Japan
-E-Mail: t-matsuu@protein.osaka-u.ac.jp
-Web Page: http://www.protein.osaka-u.ac.jp/chemistry/matsuura/
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <unistd.h>
-
-#include <time.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <sys/time.h>
-
-#include <asm/cuda.h>
-
-/*
- * Adapted for Power Macintosh by Paul Mackerras.
- */
-
-/* V1.0
- * CMOS clock manipulation - Charles Hedrick, hedrick@cs.rutgers.edu, Apr 1992
- *
- * clock [-u] -r - read cmos clock
- * clock [-u] -w - write cmos clock from system time
- * clock [-u] -s - set system time from cmos clock
- * clock [-u] -a - set system time from cmos clock, adjust the time to
- * correct for systematic error, and put it back to the cmos.
- * -u indicates cmos clock is kept in universal time
- *
- * The program is designed to run setuid, since we need to be able to
- * write to the CUDA.
- *
- *********************
- * V1.1
- * Modified for clock adjustments - Rob Hooft, hooft@chem.ruu.nl, Nov 1992
- * Also moved error messages to stderr. The program now uses getopt.
- * Changed some exit codes. Made 'gcc 2.3 -Wall' happy.
- *
- * I think a small explanation of the adjustment routine should be given
- * here. The problem with my machine is that its CMOS clock is 10 seconds
- * per day slow. With this version of clock.c, and my '/etc/rc.local'
- * reading '/etc/clock -au' instead of '/etc/clock -u -s', this error
- * is automatically corrected at every boot.
- *
- * To do this job, the program reads and writes the file '/etc/adjtime'
- * to determine the correction, and to save its data. In this file are
- * three numbers:
- *
- * 1) the correction in seconds per day (So if your clock runs 5
- * seconds per day fast, the first number should read -5.0)
- * 2) the number of seconds since 1/1/1970 the last time the program was
- * used.
- * 3) the remaining part of a second which was leftover after the last
- * adjustment
- *
- * Installation and use of this program:
- *
- * a) create a file '/etc/adjtime' containing as the first and only line:
- * '0.0 0 0.0'
- * b) run 'clock -au' or 'clock -a', depending on whether your cmos is in
- * universal or local time. This updates the second number.
- * c) set your system time using the 'date' command.
- * d) update your cmos time using 'clock -wu' or 'clock -w'
- * e) replace the first number in /etc/adjtime by your correction.
- * f) put the command 'clock -au' or 'clock -a' in your '/etc/rc.local'
- *
- * If the adjustment doesn't work for you, try contacting me by E-mail.
- *
- ******
- * V1.2
- *
- * Applied patches by Harald Koenig (koenig@nova.tat.physik.uni-tuebingen.de)
- * Patched and indented by Rob Hooft (hooft@EMBL-Heidelberg.DE)
- *
- * A free quote from a MAIL-message (with spelling corrections):
- *
- * "I found the explanation and solution for the CMOS reading 0xff problem
- * in the 0.99pl13c (ALPHA) kernel: the RTC goes offline for a small amount
- * of time for updating. Solution is included in the kernel source
- * (linux/kernel/time.c)."
- *
- * "I modified clock.c to fix this problem and added an option (now default,
- * look for USE_INLINE_ASM_IO) that I/O instructions are used as inline
- * code and not via /dev/port (still possible via #undef ...)."
- *
- * With the new code, which is partially taken from the kernel sources,
- * the CMOS clock handling looks much more "official".
- * Thanks Harald (and Torsten for the kernel code)!
- *
- ******
- * V1.3
- * Canges from alan@spri.levels.unisa.edu.au (Alan Modra):
- * a) Fix a few typos in comments and remove reference to making
- * clock -u a cron job. The kernel adjusts cmos time every 11
- * minutes - see kernel/sched.c and kernel/time.c set_rtc_mmss().
- * This means we should really have a cron job updating
- * /etc/adjtime every 11 mins (set last_time to the current time
- * and not_adjusted to ???).
- * b) Swapped arguments of outb() to agree with asm/io.h macro of the
- * same name. Use outb() from asm/io.h as it's slightly better.
- * c) Changed CMOS_READ and CMOS_WRITE to inline functions. Inserted
- * cli()..sti() pairs in appropriate places to prevent possible
- * errors, and changed ioperm() call to iopl() to allow cli.
- * d) Moved some variables around to localise them a bit.
- * e) Fixed bug with clock -ua or clock -us that cleared environment
- * variable TZ. This fix also cured the annoying display of bogus
- * day of week on a number of machines. (Use mktime(), ctime()
- * rather than asctime() )
- * f) Use settimeofday() rather than stime(). This one is important
- * as it sets the kernel's timezone offset, which is returned by
- * gettimeofday(), and used for display of MSDOS and OS2 file
- * times.
- * g) faith@cs.unc.edu added -D flag for debugging
- *
- * V1.4: alan@SPRI.Levels.UniSA.Edu.Au (Alan Modra)
- * Wed Feb 8 12:29:08 1995, fix for years > 2000.
- * faith@cs.unc.edu added -v option to print version.
- *
- * August 1996 Tom Dyas (tdyas@eden.rutgers.edu)
- * Converted to be compatible with the SPARC /dev/rtc driver.
- *
- */
-
-#define VERSION "1.4"
-
-/* Here the information for time adjustments is kept. */
-#define ADJPATH "/etc/adjtime"
-
-/* Apparently the RTC on PowerMacs stores seconds since 1 Jan 1904 */
-#define RTC_OFFSET 2082844800
-
-/* used for debugging the code. */
-/*#define KEEP_OFF */
-
-/* Globals */
-int readit = 0;
-int adjustit = 0;
-int writeit = 0;
-int setit = 0;
-int universal = 0;
-int debug = 0;
-
-time_t mkgmtime(struct tm *);
-
-volatile void
-usage ( void )
-{
- (void) fprintf (stderr,
- "clock [-u] -r|w|s|a|v\n"
- " r: read and print CMOS clock\n"
- " w: write CMOS clock from system time\n"
- " s: set system time from CMOS clock\n"
- " a: get system time and adjust CMOS clock\n"
- " u: CMOS clock is in universal time\n"
- " v: print version (" VERSION ") and exit\n"
- );
- exit(EXIT_FAILURE);
-}
-
-int adb_fd;
-
-void
-adb_init ( void )
-{
- adb_fd = open ("/dev/adb", 2);
- if (adb_fd < 0)
- {
- perror ("unable to open /dev/adb read/write : ");
- exit(EXIT_FAILURE);
- }
-}
-
-unsigned char get_packet[2] = { (unsigned char) CUDA_PACKET,
- (unsigned char) CUDA_GET_TIME };
-unsigned char set_packet[6] = { (unsigned char) CUDA_PACKET,
- (unsigned char) CUDA_SET_TIME };
-
-int
-main (int argc, char **argv )
-{
- struct tm tm, *tmp;
- time_t systime;
- time_t last_time;
- time_t clock_time;
- int i, arg;
- double factor;
- double not_adjusted;
- int adjustment = 0;
- /* unsigned char save_control, save_freq_select; */
- unsigned char reply[16];
-
- while ((arg = getopt (argc, argv, "rwsuaDv")) != -1)
- {
- switch (arg)
- {
- case 'r':
- readit = 1;
- break;
- case 'w':
- writeit = 1;
- break;
- case 's':
- setit = 1;
- break;
- case 'u':
- universal = 1;
- break;
- case 'a':
- adjustit = 1;
- break;
- case 'D':
- debug = 1;
- break;
- case 'v':
- (void) fprintf( stderr, "clock " VERSION "\n" );
- exit(EXIT_SUCCESS);
- default:
- usage ();
- }
- }
-
- /* If we are in MkLinux do not even bother trying to set the clock */
- if(!access("/proc/osfmach3/version", R_OK))
- { /* We're running MkLinux */
- if ( readit | writeit | setit | adjustit )
- printf("You must change the clock setting in MacOS.\n");
- exit(0);
- }
-
- if (readit + writeit + setit + adjustit > 1)
- usage (); /* only allow one of these */
-
- if (!(readit | writeit | setit | adjustit)) /* default to read */
- readit = 1;
-
- adb_init ();
-
- if (adjustit)
- { /* Read adjustment parameters first */
- FILE *adj;
- if ((adj = fopen (ADJPATH, "r")) == NULL)
- {
- perror (ADJPATH);
- exit(EXIT_FAILURE);
- }
- if (fscanf (adj, "%lf %d %lf", &factor, (int *) (&last_time),
- ¬_adjusted) < 0)
- {
- perror (ADJPATH);
- exit(EXIT_FAILURE);
- }
- (void) fclose (adj);
- if (debug) (void) printf(
- "Last adjustment done at %d seconds after 1/1/1970\n",
- (int) last_time);
- }
-
- if (readit || setit || adjustit)
- {
- int ii;
-
- if (write(adb_fd, get_packet, sizeof(get_packet)) < 0) {
- perror("write adb");
- exit(EXIT_FAILURE);
- }
- ii = (int) read(adb_fd, reply, sizeof(reply));
- if (ii < 0) {
- perror("read adb");
- exit(EXIT_FAILURE);
- }
- if (ii != 7)
- (void) fprintf(stderr,
- "Warning: bad reply length from CUDA (%d)\n", ii);
- clock_time = (time_t) ((reply[3] << 24) + (reply[4] << 16)
- + (reply[5] << 8)) + (time_t) reply[6];
- clock_time -= RTC_OFFSET;
-
- if (universal) {
- systime = clock_time;
- } else {
- tm = *gmtime(&clock_time);
- (void) printf("time in rtc is %s", asctime(&tm));
- tm.tm_isdst = -1; /* don't know whether it's DST */
- systime = mktime(&tm);
- }
- }
-
- if (readit)
- {
- (void) printf ("%s", ctime (&systime ));
- }
-
- if (setit || adjustit)
- {
- struct timeval tv;
- struct timezone tz;
-
-/* program is designed to run setuid, be secure! */
-
- if (getuid () != 0)
- {
- (void) fprintf (stderr,
- "Sorry, must be root to set or adjust time\n");
- exit(EXIT_FAILURE);
- }
-
- if (adjustit)
- { /* the actual adjustment */
- double exact_adjustment;
-
- exact_adjustment = ((double) (systime - last_time))
- * factor / (24 * 60 * 60)
- + not_adjusted;
- if (exact_adjustment > 0.)
- adjustment = (int) (exact_adjustment + 0.5);
- else
- adjustment = (int) (exact_adjustment - 0.5);
- not_adjusted = exact_adjustment - (double) adjustment;
- systime += adjustment;
- if (debug) {
- (void) printf ("Time since last adjustment is %d seconds\n",
- (int) (systime - last_time));
- (void) printf ("Adjusting time by %d seconds\n",
- adjustment);
- (void) printf ("remaining adjustment is %.3f seconds\n",
- not_adjusted);
- }
- }
-#ifndef KEEP_OFF
- tv.tv_sec = systime;
- tv.tv_usec = 0;
- tz.tz_minuteswest = timezone / 60;
- tz.tz_dsttime = daylight;
-
- if (settimeofday (&tv, &tz) != 0)
- {
- (void) fprintf (stderr,
- "Unable to set time -- probably you are not root\n");
- exit(EXIT_FAILURE);
- }
-
- if (debug) {
- (void) printf( "Called settimeofday:\n" );
- (void) printf( "\ttv.tv_sec = %ld, tv.tv_usec = %ld\n",
- tv.tv_sec, tv.tv_usec );
- (void) printf( "\ttz.tz_minuteswest = %d, tz.tz_dsttime = %d\n",
- tz.tz_minuteswest, tz.tz_dsttime );
- }
-#endif
- }
-
- if (writeit || (adjustit && adjustment != 0))
- {
- systime = time (NULL);
-
- if (universal) {
- clock_time = systime;
-
- } else {
- tmp = localtime(&systime);
- clock_time = mkgmtime(tmp);
- }
-
- clock_time += RTC_OFFSET;
- set_packet[2] = clock_time >> 24;
- set_packet[3] = clock_time >> 16;
- set_packet[4] = clock_time >> 8;
- set_packet[5] = (unsigned char) clock_time;
-
- if (write(adb_fd, set_packet, sizeof(set_packet)) < 0) {
- perror("write adb (set)");
- exit(EXIT_FAILURE);
- }
- i = (int) read(adb_fd, reply, sizeof(reply));
- if (debug) {
- int j;
- (void) printf("set reply %d bytes:", i);
- for (j = 0; j < i; ++j)
- (void) printf(" %.2x", (unsigned int) reply[j]);
- (void) printf("\n");
- }
- if (i != 3 || reply[1] != (unsigned char) 0)
- (void) fprintf(stderr, "Warning: error %d setting RTC\n",
- (int) reply[1]);
-
- if (debug) {
- clock_time -= RTC_OFFSET;
- (void) printf("set RTC to %s", asctime(gmtime(&clock_time)));
- }
- }
- else
- if (debug) (void) printf ("CMOS clock unchanged.\n");
- /* Save data for next 'adjustit' call */
- if (adjustit)
- {
- FILE *adj;
- if ((adj = fopen (ADJPATH, "w")) == NULL)
- {
- perror (ADJPATH);
- exit(EXIT_FAILURE);
- }
- (void) fprintf (adj, "%f %d %f\n", factor, (int) systime, not_adjusted);
- (void) fclose (adj);
- }
- exit(EXIT_SUCCESS);
-}
-
-/* Stolen from linux/arch/i386/kernel/time.c. */
-/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
- * Assumes input in normal date format, i.e. 1980-12-31 23:59:59
- * => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
- *
- * [For the Julian calendar (which was used in Russia before 1917,
- * Britain & colonies before 1752, anywhere else before 1582,
- * and is still in use by some communities) leave out the
- * -year/100+year/400 terms, and add 10.]
- *
- * This algorithm was first published by Gauss (I think).
- *
- * WARNING: this function will overflow on 2106-02-07 06:28:16 on
- * machines were long is 32-bit! (However, as time_t is signed, we
- * will already get problems at other places on 2038-01-19 03:14:08)
- */
-time_t mkgmtime(struct tm *tm)
-{
- int mon = tm->tm_mon + 1;
- int year = tm->tm_year + 1900;
-
- if (0 >= (int) (mon -= 2)) { /* 1..12 -> 11,12,1..10 */
- mon += 12; /* Puts Feb last since it has leap day */
- year -= 1;
- }
- return (((
- (unsigned long)(year/4 - year/100 + year/400 + 367*mon/12) +
- tm->tm_mday + year*365 - 719499
- )*24 + tm->tm_hour /* now have hours */
- )*60 + tm->tm_min /* now have minutes */
- )*60 + tm->tm_sec; /* finally seconds */
-}
projects / thirdparty / util-linux.git / commitdiff
