regist.c

linux下开发的一款类似于QQ的网络聊天室

#include "main.h"
#define P_MAX 1024

int regist(char *name,char *passwd)
{
	FILE *fp;
	char *p;
	char buff[P_MAX];
	if((p=strchr(name,'\n'))!=NULL)
		*p='\0';
	if((p=strchr(passwd,'\n'))!=NULL)
		*p='\0';
	if((p=strchr(name,':'))!=NULL)
	{
		printf("username error!\n");
		exit(1);
	}
	if((p=strchr(passwd,':'))!=NULL)
	{
		printf("password error!\n");
		exit(1);
	}
	fp=fopen("passwd","r");
	if(fp==NULL)
	{
		printf("open passwd error!\n");
		exit(1);
	}
	while((fgets(buff,sizeof(buff),fp))!=NULL)
	{
		p=strchr(buff,':');
		*p='\0';
		if(strcmp(buff,name)==0)
		{
			return(-1);
		}
	}
	fclose(fp);
	fp=fopen("passwd","a");
	if(fp==NULL)
	{
		printf("open passwd.txt error!\n");
		exit(1);
	}
	strcpy(buff,name);
	strcat(buff,":");
	strcat(buff,passwd);
	strcat(buff,"\n");
	fputs(buff,fp);
	fclose(fp);
	return 0;
}