Date: Tue, 29 Sep 1998 23:29:58 +0200
From: Alain Spineux <Alain.Spineux@village.uunet.be>
Organization: UCL
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To: andreoli@pisoft.it
Subject: mulinux : speed up the boot for 30'

mulinux is a very good job,
very easy to configure and to modifie


but : 

in your /etc/rc.6
....
killall5 -15
sleep 1         # 1 is not enougth for a program to save something
killall5 -9     # to the floppy, i suggest you 5 or 10 sec
....

AND

to speed up the boot I propose to use my program ddifskip.c
to replace dd in your /etc/rc.M

....
echo "Loading ram2.bz2 (80 seconds) ... wait, wait :)"
mount /dev/ram1 /usr
cd /
#dd if=/dev/fd0H1722 skip=$offset|bzip2 -ds|tar -xf -
ddifskip /dev/fd0H1722 $offset|bzip2 -ds|tar -xf -
....

my program uses lseek to skip first $offset blocks
althought dd reads it !

/***
*  ddifskip.c
* 
*  replace "dd if=argv[1] skip=argv[2]"
*  use "lseek" for skip to speed up
* 
*  for mulinux
*
*  Alain Spineux 9/98
***/

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>

#define BUFSIZE 1024 

int main(int argc, char *argv[])

#include <stdio.h>

{
  char buf[BUFSIZE];
  int fd;
  int n;
  
  fd=open(argv[1], O_RDONLY);
  lseek(fd, 1024*atoi(argv[2]), SEEK_SET);
  while (1) {
        n=read(fd, buf, BUFSIZE);
        if (n == 0) break;          /* EOF.  */
        if (n < 0) return -2;
        write(1, buf, n);
  }
  close(fd);
  return 0;
}


-- 

	Spineux Alain

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  Spineux Alain				E-MAIL : spineux@prm.ucl.ac.be
  INSTITUT STEVIN
  Catholic University of Louvain	FAX    : 32-10-472501
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