+++ /dev/null
-/* setime - set the system time from the real time clock
- Authors: T. Holm & E. Froese
- Adapted by: Jorrit .N. Herder */
-
-#define _MINIX
-/************************************************************************/
-/* Readclock was updated for security reasons: openeing /dev/mem no */
-/* longer automatically grants I/O privileges to the calling process */
-/* so that the CMOS' clock could not be read from this program. The */
-/* new approach is to rely on the FS to do the CMOS I/O, via the new */
-/* system call CMOSTIME (which only reads the current clock value and */
-/* cannot update the CMOS clock). */
-/* The original readclock.c is still available under backup.c. */
-/************************************************************************/
-/* */
-/* readclock.c */
-/* */
-/* Read the clock value from the 64 byte CMOS RAM */
-/* area, then set system time. */
-/* */
-/* If the machine ID byte is 0xFC or 0xF8, the device */
-/* /dev/mem exists and can be opened for reading, */
-/* and no errors in the CMOS RAM are reported by the */
-/* RTC, then the time is read from the clock RAM */
-/* area maintained by the RTC. */
-/* */
-/* The clock RAM values are decoded and fed to mktime */
-/* to make a time_t value, then stime(2) is called. */
-/* */
-/* This fails if: */
-/* */
-/* If the machine ID does not match 0xFC or 0xF8 (no */
-/* error message.) */
-/* */
-/* If the machine ID is 0xFC or 0xF8 and /dev/mem */
-/* is missing, or cannot be accessed. */
-/* */
-/* If the RTC reports errors in the CMOS RAM. */
-/* */
-/************************************************************************/
-/* origination 1987-Dec-29 efth */
-/* robustness 1990-Oct-06 C. Sylvain */
-/* incorp. B. Evans ideas 1991-Jul-06 C. Sylvain */
-/* set time & calibrate 1992-Dec-17 Kees J. Bot */
-/* clock timezone 1993-Oct-10 Kees J. Bot */
-/* set CMOS clock 1994-Jun-12 Kees J. Bot */
-/* removed set CMOS 2004-Sep-06 Jorrit N. Herder */
-/************************************************************************/
-
-#include <minix/callnr.h>
-#include <minix/config.h>
-#include <minix/type.h>
-#include <minix/const.h>
-#include <minix/com.h>
-#include <minix/syslib.h>
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/ioc_cmos.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
-#include <errno.h>
-#include <signal.h>
-#include <ibm/portio.h>
-#include <ibm/cmos.h>
-#include <sys/svrctl.h>
-
-#define MAX_RETRIES 1
-
-int nflag = 0; /* Tell what, but don't do it. */
-int y2kflag = 0; /* Interpret 1980 as 2000 for clock with Y2K bug. */
-
-char clocktz[128]; /* Timezone of the clock. */
-
-#define MACH_ID_ADDR 0xFFFFE /* BIOS Machine ID at FFFF:000E */
-
-#define PC_AT 0xFC /* Machine ID byte for PC/AT,
- PC/XT286, and PS/2 Models 50, 60 */
-#define PS_386 0xF8 /* Machine ID byte for PS/2 Model 80 */
-
-/* Manufacturers usually use the ID value of the IBM model they emulate.
- * However some manufacturers, notably HP and COMPAQ, have had different
- * ideas in the past.
- *
- * Machine ID byte information source:
- * _The Programmer's PC Sourcebook_ by Thom Hogan,
- * published by Microsoft Press
- */
-
-void errmsg(char *s);
-int bcd_to_dec(int n);
-int dec_to_bcd(int n);
-void usage(void);
-
-#define CMOS_DEV "/dev/cmos"
-
-PUBLIC int main(int argc, char **argv)
-{
- int fd;
- struct tm time1;
- struct tm time2;
- struct tm tmnow;
- char date[64];
- time_t now, rtc;
- int i, s, mem;
- unsigned char mach_id, cmos_state;
- struct sysgetenv sysgetenv;
- message m;
- int request;
-
-
- /* Process options. */
- while (argc > 1) {
- char *p = *++argv;
-
- if (*p++ != '-') usage();
-
- while (*p != 0) {
- switch (*p++) {
- case 'n': nflag = 1; break;
- case '2': y2kflag = 1; break;
- default: usage();
- }
- }
- argc--;
- }
-
-#if DEAD_CODE
- /* The hardware clock may run in a different time zone, likely GMT or
- * winter time. Select that time zone.
- */
- strcpy(clocktz, "TZ=");
- sysgetenv.key = "TZ";
- sysgetenv.keylen = 2+1;
- sysgetenv.val = clocktz+3;
- sysgetenv.vallen = sizeof(clocktz)-3;
- if (svrctl(SYSGETENV, &sysgetenv) == 0) {
- putenv(clocktz);
- tzset();
- }
-#endif
-
- /* Read the CMOS real time clock. */
- for (i = 0; i < MAX_RETRIES; i++) {
-
- /* sleep, unless first iteration */
- if (i > 0) sleep(5);
-
- /* Open the CMOS device to read the system time. */
- if ((fd = open(CMOS_DEV, O_RDONLY)) < 0) {
- fprintf(stderr, "Couldn't open CMOS device: %d.\n",s);
- exit(1);
- }
- request = (y2kflag) ? CIOCGETTIME : CIOCGETTIMEY2K;
- if ((s=ioctl(fd, request, (void *) &time1)) < 0) {
- fprintf(stderr, "Couldn't do CMOS ioctl: %d.\n",s);
- exit(1);
- }
- close(fd);
-
- now = time(NULL);
-
- time1.tm_isdst = -1; /* Do timezone calculations. */
- time2 = time1;
-
- rtc= mktime(&time1); /* Transform to a time_t. */
- if (rtc != -1) {
- printf("rtc from CMOS driver: %u\n", rtc);
- break;
- }
-
- fprintf(stderr,
-"readclock: Invalid time read from CMOS RTC: %d-%02d-%02d %02d:%02d:%02d\n",
- time2.tm_year+1900, time2.tm_mon+1, time2.tm_mday,
- time2.tm_hour, time2.tm_min, time2.tm_sec);
- }
- if (i >= MAX_RETRIES) exit(1);
-
- /* Now set system time. */
- if (nflag) {
- printf("stime(%lu)\n", (unsigned long) rtc);
- } else {
- if (stime(&rtc) < 0) {
- errmsg( "Not allowed to set time." );
- exit(1);
- }
- }
- tmnow = *localtime(&rtc);
- if (strftime(date, sizeof(date),
- "%a %b %d %H:%M:%S %Z %Y", &tmnow) != 0) {
- if (date[8] == '0') date[8]= ' ';
-#if 0
- printf("%s [CMOS read via FS, see command/ibm/readclock.c]\n", date);
-#endif
- }
- exit(0);
-}
-
-void errmsg(char *s)
-{
- static char *prompt = "readclock: ";
-
- fprintf(stderr, "%s%s\n", prompt, s);
- prompt = "";
-}
-
-
-int bcd_to_dec(int n)
-{
- return ((n >> 4) & 0x0F) * 10 + (n & 0x0F);
-}
-
-int dec_to_bcd(int n)
-{
- return ((n / 10) << 4) | (n % 10);
-}
-
-void usage(void)
-{
- fprintf(stderr, "Usage: settime [-n2]\n");
- exit(1);
-}
