configfile.c

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

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

#include "configfile.h"

void read_config(char* cfgfile, char* ip, char* ip2, char* initrd,
		char* kernel, char* cmdline, int* mem_mb, int* maxmem_mb,
		int* console, int* vif, int* num_vbds,struct vbd* vbds)

{
	char key[256];
	char value[256];
	struct vbd* vbd = vbds;
	FILE* f = fopen(cfgfile,"r");

	*num_vbds=0;

	if(!f)
	{
		printf("error opening cfg file %s\n", cfgfile);
		exit(-1);
	}

	while( fscanf(f, "%[^=] = %[^\n]\n", key, value)!= EOF)
	{
		if(!strcmp(key, "kernel"))
		{
			strcpy(kernel,value);
		}
		else if(!strcmp(key, "initrd"))
		{
			strcpy(initrd,value);
		}
		else if(!strcmp(key, "ip"))
		{
			strcpy(ip,value);
		}
		else if(!strcmp(key, "ip2"))
		{
			strcpy(ip2,value);
		}
		else if(!strcmp(key, "cmdline"))
		{
			strcpy(cmdline,value);
		}
		else if(vbd && !strcmp(key, "vbd"))
		{
			strcpy(vbd->mode,"r");
			sscanf(value, "%x,%x,%s\n", &vbd->pdev,&vbd->vdev,vbd->mode);
			vbd++;
			++(*num_vbds);
		}
		else if(!strcmp(key, "mem"))
		{
			sscanf(value, "%dM", mem_mb);
		}
		else if(!strcmp(key, "maxmem"))
		{
			sscanf(value, "%dM", maxmem_mb);
		}

		else if(!strcmp(key, "console"))
		{
			sscanf(value, "%d", console);
		}
		else if(!strcmp(key, "vif"))
		{
			sscanf(value, "%d", vif);
		}
	}

	fclose(f);
}