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-rw-r--r--sys-utils/clock.c490
1 files changed, 0 insertions, 490 deletions
diff --git a/sys-utils/clock.c b/sys-utils/clock.c
deleted file mode 100644
index 15020c260..000000000
--- a/sys-utils/clock.c
+++ /dev/null
@@ -1,490 +0,0 @@
-#include <stdio.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <time.h>
-#include <sys/time.h>
-#include <string.h>
-
-#define USE_INLINE_ASM_IO
-
-#ifdef USE_INLINE_ASM_IO
-#include <asm/io.h>
-#endif
-
-/* 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 the CMOS port.
- *
- * I don't know what the CMOS clock will do in 2000, so this program
- * probably won't work past the century boundary.
- *
- *********************
- * 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.
- *
- */
-
-#define VERSION "1.4"
-
-/* Here the information for time adjustments is kept. */
-#define ADJPATH "/etc/adjtime"
-
-
-/* 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;
-
-volatile void
-usage ()
-{
- 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 (1);
-}
-
-#ifndef USE_INLINE_ASM_IO
-int cmos_fd;
-#endif
-
-static inline unsigned char cmos_read(unsigned char reg)
-{
- register unsigned char ret;
- __asm__ volatile ("cli");
- outb (reg | 0x80, 0x70);
- ret = inb (0x71);
- __asm__ volatile ("sti");
- return ret;
-}
-
-static inline void cmos_write(unsigned char reg, unsigned char val)
-{
- outb (reg | 0x80, 0x70);
- outb (val, 0x71);
-}
-
-#ifndef outb
-static inline void
-outb (char val, unsigned short port)
-{
-#ifdef USE_INLINE_ASM_IO
- __asm__ volatile ("out%B0 %0,%1"::"a" (val), "d" (port));
-#else
- lseek (cmos_fd, port, 0);
- write (cmos_fd, &val, 1);
-#endif
-}
-#endif
-
-#ifndef inb
-static inline unsigned char
-inb (unsigned short port)
-{
- unsigned char ret;
-#ifdef USE_INLINE_ASM_IO
- __asm__ volatile ("in%B0 %1,%0":"=a" (ret):"d" (port));
-#else
- lseek (cmos_fd, port, 0);
- read (cmos_fd, &ret, 1);
-#endif
- return ret;
-}
-#endif
-
-void
-cmos_init ()
-{
-#ifdef USE_INLINE_ASM_IO
- if (iopl (3))
- {
- fprintf(stderr,"clock: unable to get I/O port access\n");
- exit (1);
- }
-#else
- cmos_fd = open ("/dev/port", 2);
- if (cmos_fd < 0)
- {
- perror ("unable to open /dev/port read/write : ");
- exit (1);
- }
- if (lseek (cmos_fd, 0x70, 0) < 0 || lseek (cmos_fd, 0x71, 0) < 0)
- {
- perror ("unable to seek port 0x70 in /dev/port : ");
- exit (1);
- }
-#endif
-}
-
-static inline int
-cmos_read_bcd (int addr)
-{
- int b;
- b = cmos_read (addr);
- return (b & 15) + (b >> 4) * 10;
-}
-
-static inline void
-cmos_write_bcd (int addr, int value)
-{
- cmos_write (addr, ((value / 10) << 4) + value % 10);
-}
-
-int
-main (int argc, char **argv, char **envp)
-{
- struct tm tm;
- time_t systime;
- time_t last_time;
- char arg;
- double factor;
- double not_adjusted;
- int adjustment = 0;
- unsigned char save_control, save_freq_select;
-
- 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':
- fprintf( stderr, "clock " VERSION "\n" );
- exit(0);
- default:
- usage ();
- }
- }
-
- if (readit + writeit + setit + adjustit > 1)
- usage (); /* only allow one of these */
-
- if (!(readit | writeit | setit | adjustit)) /* default to read */
- readit = 1;
-
- cmos_init ();
-
- if (adjustit)
- { /* Read adjustment parameters first */
- FILE *adj;
- if ((adj = fopen (ADJPATH, "r")) == NULL)
- {
- perror (ADJPATH);
- exit (2);
- }
- if (fscanf (adj, "%lf %d %lf", &factor, &last_time, &not_adjusted) < 0)
- {
- perror (ADJPATH);
- exit (2);
- }
- fclose (adj);
- if (debug) printf ("Last adjustment done at %d seconds after 1/1/1970\n", last_time);
- }
-
- if (readit || setit || adjustit)
- {
- int i;
-
-/* read RTC exactly on falling edge of update flag */
-/* Wait for rise.... (may take upto 1 second) */
-
- for (i = 0; i < 10000000; i++)
- if (cmos_read (10) & 0x80)
- break;
-
-/* Wait for fall.... (must try at least 2.228 ms) */
-
- for (i = 0; i < 1000000; i++)
- if (!(cmos_read (10) & 0x80))
- break;
-
-/* The purpose of the "do" loop is called "low-risk programming" */
-/* In theory it should never run more than once */
- do
- {
- tm.tm_sec = cmos_read_bcd (0);
- tm.tm_min = cmos_read_bcd (2);
- tm.tm_hour = cmos_read_bcd (4);
- tm.tm_wday = cmos_read_bcd (6);
- tm.tm_mday = cmos_read_bcd (7);
- tm.tm_mon = cmos_read_bcd (8);
- tm.tm_year = cmos_read_bcd (9);
- }
- while (tm.tm_sec != cmos_read_bcd (0));
- if (tm.tm_year < 70)
- tm.tm_year += 100; /* 70..99 => 1970..1999, 0..69 => 2000..2069 */
- tm.tm_mon--; /* DOS uses 1 base */
- tm.tm_wday -= 3; /* DOS uses 3 - 9 for week days */
- tm.tm_isdst = -1; /* don't know whether it's daylight */
- if (debug) printf ("Cmos time : %d:%d:%d\n", tm.tm_hour, tm.tm_min, tm.tm_sec);
- }
-
- if (readit || setit || adjustit)
- {
-/*
- * mktime() assumes we're giving it local time. If the CMOS clock
- * is in GMT, we have to set up TZ so mktime knows it. tzset() gets
- * called implicitly by the time code, but only the first time. When
- * changing the environment variable, better call tzset() explicitly.
- */
- if (universal)
- {
- char *zone;
- zone = (char *) getenv ("TZ"); /* save original time zone */
- (void) putenv ("TZ=");
- tzset ();
- systime = mktime (&tm);
- /* now put back the original zone */
- if (zone)
- {
-
- char *zonebuf;
- zonebuf = malloc (strlen (zone) + 4);
- strcpy (zonebuf, "TZ=");
- strcpy (zonebuf+3, zone);
- putenv (zonebuf);
- free (zonebuf);
- }
- else
- { /* wasn't one, so clear it */
- putenv ("TZ");
- }
- tzset ();
- }
- else
- {
- systime = mktime (&tm);
- }
- if (debug) printf ("Number of seconds since 1/1/1970 is %d\n", systime);
- }
-
- if (readit)
- {
- printf ("%s", ctime (&systime ));
- }
-
- if (setit || adjustit)
- {
- struct timeval tv;
- struct timezone tz;
-
-/* program is designed to run setuid, be secure! */
-
- if (getuid () != 0)
- {
- fprintf (stderr, "Sorry, must be root to set or adjust time\n");
- exit (2);
- }
-
- 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) {
- printf ("Time since last adjustment is %d seconds\n",
- (int) (systime - last_time));
- printf ("Adjusting time by %d seconds\n",
- adjustment);
- 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)
- {
- fprintf (stderr,
- "Unable to set time -- probably you are not root\n");
- exit (1);
- }
-
- if (debug) {
- printf( "Called settimeofday:\n" );
- printf( "\ttv.tv_sec = %ld, tv.tv_usec = %ld\n",
- tv.tv_sec, tv.tv_usec );
- printf( "\ttz.tz_minuteswest = %d, tz.tz_dsttime = %d\n",
- tz.tz_minuteswest, tz.tz_dsttime );
- }
-#endif
- }
-
- if (writeit || (adjustit && adjustment != 0))
- {
- struct tm *tmp;
- systime = time (NULL);
- if (universal)
- tmp = gmtime (&systime);
- else
- tmp = localtime (&systime);
-
-#ifndef KEEP_OFF
- __asm__ volatile ("cli");
- save_control = cmos_read (11); /* tell the clock it's being set */
- cmos_write (11, (save_control | 0x80));
- save_freq_select = cmos_read (10); /* stop and reset prescaler */
- cmos_write (10, (save_freq_select | 0x70));
-
- cmos_write_bcd (0, tmp->tm_sec);
- cmos_write_bcd (2, tmp->tm_min);
- cmos_write_bcd (4, tmp->tm_hour);
- cmos_write_bcd (6, tmp->tm_wday + 3);
- cmos_write_bcd (7, tmp->tm_mday);
- cmos_write_bcd (8, tmp->tm_mon + 1);
- cmos_write_bcd (9, tmp->tm_year);
-
- cmos_write (10, save_freq_select);
- cmos_write (11, save_control);
- __asm__ volatile ("sti");
-#endif
- if (debug) printf ("Set to : %d:%d:%d\n", tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
- }
- else
- if (debug) printf ("CMOS clock unchanged.\n");
- /* Save data for next 'adjustit' call */
- if (adjustit)
- {
- FILE *adj;
- if ((adj = fopen (ADJPATH, "w")) == NULL)
- {
- perror (ADJPATH);
- exit (2);
- }
- fprintf (adj, "%f %d %f\n", factor, systime, not_adjusted);
- fclose (adj);
- }
- exit (0);
-}
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