From: Ben Gras Date: Fri, 5 Aug 2005 08:37:28 +0000 (+0000) Subject: readclock.c shouldn't be here X-Git-Tag: v3.1.0~447 X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/man.host.html?a=commitdiff_plain;h=8476ceac2248a2b52db95e9670412019d144dc82;p=minix.git readclock.c shouldn't be here --- diff --git a/drivers/cmos/Makefile b/drivers/cmos/Makefile index 09bbcb742..c94f2e3a3 100644 --- a/drivers/cmos/Makefile +++ b/drivers/cmos/Makefile @@ -22,10 +22,9 @@ LIBDRIVER = $d/libdriver/driver.o # build local binary all build: $(DRIVER) -$(DRIVER): $(OBJ) $(LIBDRIVER) readclock.o +$(DRIVER): $(OBJ) $(LIBDRIVER) $(CC) -o $@ $(LDFLAGS) $(OBJ) $(LIBDRIVER) $(LIBS) install -S 1024w $(DRIVER) - $(CC) -o readclock readclock.c $(LIBDRIVER): cd $d/libdriver && $(MAKE) diff --git a/drivers/cmos/readclock.c b/drivers/cmos/readclock.c deleted file mode 100755 index be8d69357..000000000 --- a/drivers/cmos/readclock.c +++ /dev/null @@ -1,226 +0,0 @@ -/* 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 -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#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); -}