input_check.c

一个网络传输文件程序

#include <stdio.h>
#include <sys/types.h>
#include <regex.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include "input_check.h"
#define FNAMELEN 100

int server_checkfile(char *filename)
{
	if(access(filename,R_OK)<0){
//		printf("server no such file, please check it\n");
		return 1;
	}
	return 0;
}

int server_checkDIR(char *filename)
{
	char *p,*q;
	char dir[FNAMELEN]={0};
	struct stat buf;
	for(p=filename; *p!='\0'; p++){
		if(*p=='/')
			q=p;
	}
	strncpy(dir, filename, q-filename);
	stat(dir, &buf);
	if(!S_ISDIR(buf.st_mode)){
//		printf("server no such direct, please check it\n");
		return 1;
	}
	return 0;
}

int client_checkfile(char *filename)
{
	if(access(filename, R_OK)<0){
		printf("Sorry, Client no such file, please check it!\n");
		return 1;
	}
	return 0;
}

int client_checkDIR(char *directory)
{
	struct stat buf;
	stat(directory, &buf);
	if(!S_ISDIR(buf.st_mode)){
		printf("Sorry, Client no such directory, please check it!\n");
		return 1;
	}
	return 0;
}

int checkIP(char *ip_addr)
{
	char *pattern;
	int x, z, lno = 0, cflags = 1;
	regex_t reg;
	regmatch_t pm[10];
	const size_t nmatch = 10;
	pattern="\\b(((2[0-4][0-9]|25[0-5]|[01]?[0-9][0-9]?)\\.){3}(2[0-4][0-9]|25[0-5]|[01]?[0-9][0-9]?))\\b";
	z = regcomp(&reg, pattern, REG_EXTENDED);
	if (z != 0){
		printf("regcomp error\n");
		return 1;
	}
	z = regexec(&reg, ip_addr, nmatch, pm, 0);
	if(z!=0){
		printf("Sorry, the IP address is not regular\n");
		return 1;
	}
	regfree(&reg);
	return 0;

}