linux-vax-kern-commit

[Andy P. <at...@us...>]

Update of /cvsroot/linux-vax/kernel-2.4/arch/vax/boot/tools
In directory usw-pr-cvs1:/tmp/cvs-serv1072/tools

Added Files:
	setcmdline.c 
Log Message:
Put the kernel command line in first part of head.S
Add a small tool called from makefile to set the command line 



--- NEW FILE ---
/* write a command line into a header block */
/* atp Sept 2001 */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#define COMMAND_LINE_SIZE 256
#define COMMAND_LINE_OFFSET 0x204

int main (int argc, char *argv[])
{
   int kern_fd;
   char buffer[COMMAND_LINE_SIZE];
   
   if (called_as(argv[0],"showcmdline")) {
      if (argc < 2) {
        printf ("usage: showcmdline kernel_image\n");
        exit(1);
      } 
   }else {
      if (argc < 3) {
         printf ("usage: setcmdline kernel_image \"command line\"\n");
         exit(1);
       }
   }
   
   if ((kern_fd=open(argv[1], O_RDWR))<0) {
      perror(argv[1]);
      exit(1);
   }
   memset(buffer,0,COMMAND_LINE_SIZE);

   if (called_as(argv[0],"setcmdline"))  {
   
      if (strlen(argv[2])>=COMMAND_LINE_SIZE) {
           printf("Warning: Command Line truncated to %d bytes!\n",COMMAND_LINE_SIZE-1);
      }
      strncpy(buffer,argv[2],(COMMAND_LINE_SIZE-1));
      lseek(kern_fd,COMMAND_LINE_OFFSET,SEEK_SET);
   
      printf("\n\nSetting kernel command line to:\n\t%s\n\n",buffer);
      write(kern_fd,buffer,strlen(buffer));
   } else {
      lseek(kern_fd,COMMAND_LINE_OFFSET,SEEK_SET);
      read(kern_fd,buffer,(COMMAND_LINE_SIZE-1));
      printf("\nKernel command line is:\n\t%s\n",buffer);
   }
   close(kern_fd);
}

int called_as(char *str1, char *str2)
{
   char *tmp;
   
   tmp = strrchr(str1,'/');
   if (tmp==NULL) tmp=str1; else tmp++;
//   printf("%s %s, %s\n",str1,str2,tmp);
   return (!strncmp(tmp,str2,strlen(str2)));
}