RE: need to program grub by hour and date?

[Kjeld Flarup Christensen \(ST/LMD\)]

Why not use a DHCP boot - you can still boot from the HD, but the DHCP
server will give a different grub menu depending on the time.

  Kjeld 

> -----Original Message-----
> From: 
> address@hidden
>  
> [mailto:bug-grub-bounces+kjeld.flarup.christensen=ericsson.com
@gnu.org] On Behalf Of adrian15
> Sent: 10. februar 2006 10:08
> To: address@hidden
> Subject: need to program grub by hour and date?
> 
> Hi. I am planning to add some commands to Grub in order to 
> work with hour and date.
> 
> I need situations on which this will be useful and requests 
> on how would the commands will be run.
> 
> I propose you two situations.
> 
> 1) Situation. Clusters
>    In an university or high school BIOS are set to be awake 
> at 00:00 hours.
>    Grub checks it is 00:00 or later but not later than 07:00 
> (when the lessons begin) and runs an special boot entry for 
> making the computer a cluster client.
> 
> 2) Situation. Lessons on high school.
>    Teachers and pupils don't dominate Grub menu... you have 
> to press keys with strange arrows and it is difficult. What a 
> stupid program! We cannot use Mouse!
>    So... menu.lst file is set up with the new dayow, and hour 
> commands so that the timetable is reflected when there's a 
> classroom related to computer sciences Linux is boot and when 
> there's an English or Physics classroom Windows is boot.
> 
> So I am waiting your thoughts.
> 
> 
> The idea would be commands such as:
> 
> dayow 1 4 : Gives error if it's not Monday, Tuesday, 
> Wednesday or Thursday.
> dayom 1 4 : Gives error if it's not 1 or 2 or 3 or 4 on the 
> current month.
> hour 22 00 07 00 : Gives error if it's a time between 07:01 
> AM and 09:59 PM (21:59h).
> 
> If you have seen Super Grub Disk source code you will know 
> that I will use default and fallback entries to boot one 
> thing or another depending on errors.
> 
> I have some code to use on the commands but I have not yet 
> worked on them:
> 
> #define RTC_PORT_WRITE        0x70
> #define RTC_PORT_READ         0x71
> 
> #define RTC_REG_SECOND        0x00
> #define RTC_REG_MINUTE        0x02
> #define RTC_REG_HOUR          0x04
> #define RTC_REG_DOW           0x06
> #define RTC_REG_DAY           0x07
> #define RTC_REG_MONTH         0x08
> #define RTC_REG_YEAR          0x09
> 
> 
> 
> #define NIBBLE2DEC(x)    (((x&0xf0)>>4)*10 + (x&0x0f) )
> /* alternativa: no hacer nada
> #define NIBBLE2DEC(x)    (x)
> */
> 
> void rtc_read(void)
> {
>      /* variables: hacer algo con ellas, o globales o lo que sea */
>      char second, minute, hour;
>      char weekdate, day, month, year;
> 
>      /* Leer time */
>      outb(RTC_PORT_WRITE, RTC_REG_SECOND);
>      second = NIBBLE2DEC(inb(RTC_PORT_READ));
> 
>      outb(RTC_PORT_WRITE, RTC_REG_MINUTE);
>      minute = NIBBLE2DEC(inb(RTC_PORT_READ));
> 
>      outb(RTC_PORT_WRITE, RTC_REG_HOUR);
>      hour = NIBBLE2DEC(inb(RTC_PORT_READ));
> 
>      /* Leer fecha */
>      outb(RTC_PORT_WRITE, RTC_REG_DOW);
>      weekdate = inb(RTC_PORT_READ);
> 
>      outb(RTC_PORT_WRITE, RTC_REG_DAY);
>      day = NIBBLE2DEC(inb(RTC_PORT_READ));
> 
>      outb(RTC_PORT_WRITE, RTC_REG_MONTH);
>      month = NIBBLE2DEC(inb(RTC_PORT_READ));
> 
>      outb(RTC_PORT_WRITE, RTC_REG_YEAR);
>      year = NIBBLE2DEC(inb(RTC_PORT_READ));
> 
> }
> 
> void rtc_read(void)
> {
>      /* variables: hacer algo con ellas, o globales o lo que sea */
>      char second, minute, hour;
>      char weekdate, day, month, year;
>      char string[18], *str;
> 
>      /* Leer time */
>      outb(RTC_PORT_WRITE, RTC_REG_SECOND;
>      second = inb(RTC_PORT_READ);
> 
>      outb(RTC_PORT_WRITE, RTC_REG_MINUTE;
>      minute = inb(RTC_PORT_READ);
> 
>      outb(RTC_PORT_WRITE, RTC_REG_HOUR;
>      hour = inb(RTC_PORT_READ);
> 
>      /* Leer fecha */
>      outb(RTC_PORT_WRITE, RTC_REG_DOW;
>      weekdate = inb(RTC_PORT_READ;
> 
>      outb(RTC_PORT_WRITE, RTC_REG_DAY;
>      day = inb(RTC_PORT_READ);
> 
>      outb(RTC_PORT_WRITE, RTC_REG_MONTH;
>      month = inb(RTC_PORT_READ);
> 
>      outb(RTC_PORT_WRITE, RTC_REG_YEAR;
>      year = inb(RTC_PORT_READ);
> 
>      str = string;
>      *str++ = (day>>4)+'0';
>      *str++ = (day&0x0f)+'0';
>      *str++ = "/";
>      *str++ = (month>>4)+'0';
>      *str++ = (month&0x0f)+'0';
>      *str++ = "/";
>      *str++ = (year>>4)+'0';
>      *str++ = (year&0x0f)+'0';
>      *str++ = " ";
>      *str++ = (hour>>4)+'0';
>      *str++ = (hour&0x0f)+'0';
>      *str++ = ":";
>      *str++ = (minute>>4)+'0';
>      *str++ = (minute&0x0f)+'0';
>      *str++ = ":";
>      *str++ = (second>>4)+'0';
>      *str++ = (second&0x0f)+'0';
>      *str++ = 0;
> }
> 
> adrian15
> 
> 
> _______________________________________________
> Bug-grub mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/bug-grub
>