| /* |
| 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 */ |
| } |