xdmesg.c

系统迁移的源代码： http://www.diku.dk/hjemmesider/ansatte/jacobg/

#include <xenctrl.h>
#include <xenguest.h>

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include <xs.h>
#include <fcntl.h>

#include <sys/mman.h>

#define RING_SIZE 4096*8

int xc;

int main(int argc, char** argv)
{
	char* b= (char*) mmap(0,RING_SIZE, PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0,0);
	char* a = b;
	unsigned int n=RING_SIZE;
	int i;

	xc = xc_interface_open();

	xc_readconsolering(xc,&b,&n,1);

	for(i=0; i<n; i++) if(!isascii(a[i])) a[i]=' ';

	a[n]='\0';

	xc_interface_close(xc);

	puts(a);

	return 0;
}