Linux 网络编程 wrap.c和wrap.h

转载自：https://blog.csdn.net/libochun3217/article/details/9095569
感谢大佬
添加ssize_t Readline(int fd,void *vptr,size_t maxlen);函数

wrap.h

#ifndef WRAP_H
#define WRAP_H #include <stdlib.h>
#include <errno.h>
#include <sys/socket.h> void perr_exit(const char *s); int Accept(int fd, struct sockaddr *sa, socklen_t *salenptr);
void Bind(int fd, const struct sockaddr *sa, socklen_t salen);
void Connect(int fd, const struct sockaddr *sa, socklen_t salen);
void Listen(int fd, int backlog); int Socket(int family, int type, int protocol);
void Close(int fd); ssize_t Readline(int fd,void *vptr,size_t maxlen);
ssize_t Read(int fd, void *ptr, size_t nbytes);
ssize_t Write(int fd, const void *ptr, size_t nbytes); ssize_t Readn(int fd, void *vptr, size_t n);
ssize_t Writen(int fd, const void *vptr, size_t n); #endif

wrap.c

#include "stdio.h"
#include "unistd.h"
#include "sys/types.h"
#include "sys/stat.h"
#include "fcntl.h"
#include "stdlib.h"
#include "string.h"
#include "sys/socket.h"
#include "ctype.h"
#include "arpa/inet.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((ECONNABORTED == errno) || (EINTR == errno)) 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(EINTR == errno) 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(EINTR == errno) goto again; else return -1; } return n;
} void Close(int fd)
{ if(close(fd) == -1) perr_exit("close error");
} ssize_t Readn(int fd, void *vptr, size_t nbytes)
{ size_t nleft; size_t nread; char *ptr; ptr = vptr; nleft = nbytes; while(nleft > 0) { if((nread = read(fd, ptr, nleft)) < 0) { if(EINTR == errno)     nread = 0; else return -1; } else if(nread == 0) break; nleft -= nread; ptr += nread; } return (nbytes-nleft);
} static ssize_t my_read(int fd,char *ptr)
{static int read_cnt;static char * read_ptr;static char read_buf[100];if(read_cnt <= 0){again:if((read_cnt == read(fd,read_buf,sizeof(read_buf))) < 0){if(errno == EINTR)goto again;return -1;}else if(read_cnt == 0)return 0;read_ptr = read_buf;}read_cnt--;*ptr = *read_ptr++;return 1;
}ssize_t Readline(int fd,void *vptr,size_t maxlen)
{ssize_t n,rc;char c,*ptr;ptr = vptr;for(n = 1;n < maxlen;n ++){if((rc = my_read(fd,&c)) == 1){*ptr++ = c;if(c == '\n')break;}else if(rc == 0){*ptr = 0;return n - 1;}else{return -1;}}*ptr = 0;return n;
}ssize_t Writen(int fd, const void *vptr, size_t nbytes)
{ size_t nleft; size_t nwritten; const char *ptr; ptr = vptr; nleft = nbytes; while(nleft > 0) { if((nwritten = write(fd, ptr, nleft)) <= 0) {    if(nwritten < 0 && EINTR == errno) nwritten = 0; else return -1; } nleft -= nwritten; ptr += nwritten; } return nbytes;
}

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