wrap.c

简单 ftp 服务器及客户端

#include<errno.h>
#include"wrap.h"

void perr_exit(const char *s)
{
	perror(s);
	exit(1);
}

int Accept(int fd, struct sockaddr *sa, socklen_t *salenptr)
{
	int n;

again:
	if((n = accept(fd, sa, salenptr)) < 0) {
		if((errno == ECONNABORTED) || (errno == EINTR))
			goto again;
		else 
			perr_exit("accept error");
	}
	return n;
}

void Bind(int fd, const struct sockaddr *sa, socklen_t salen)
{
	if(bind(fd, sa, salen)<0)
		perr_exit("bind error");
}

void Connect(int fd, const struct sockaddr *sa, socklen_t salen)
{
	if(connect(fd, sa, salen)<0)
		perr_exit("connect error");
}

void Listen(int fd, int backlog)
{
	if(listen(fd, backlog)<0)
		perr_exit("listen error");
}

int Socket(int family, int type, int protocol)
{
	int n;

	if((n = socket(family, type, protocol)) < 0)
		perr_exit("socket error");
	return n;
}

ssize_t Read(int fd, void *ptr, size_t nbytes)
{
	ssize_t n;
again:
		if((n=read(fd, ptr, nbytes)) == -1) {
			if(errno == EINTR)
				goto again;
			else
				return -1;
		}
		return n;
}

ssize_t Write(int fd, const void *ptr, size_t nbytes)
{
	ssize_t n;
again:
		if((n = write(fd, ptr, nbytes)) == -1) {
			if(errno == EINTR)
				goto again;
			else
				return -1;
		}
		return n;
}

void Close(int fd)
{
	if(close(fd) == -1)
		perr_exit("close error");
}

void  cftype(const char *path, char *cfile_type)
{
	if(access(path, X_OK))
		strcpy(cfile_type, "644");
	else
		strcpy(cfile_type, "755");
}

int iftype(const char *cfile_type, int * ifile_type)
{
	if(!strcmp(cfile_type, "644")) {
	   *ifile_type = 0644;
		return 0;
	}
	if(!strcmp(cfile_type, "755")) {
	   *ifile_type = 0755;
		return 0;
	}
	return 1;
}