linux 进程间通信系列2,使用UNIX_SOCKET
1,使用stream,实现进程间通信
2,使用DGRAM,实现进程间通信
关键点:使用一个临时的文件,进行信息的互传。
s_un.sun_family = AF_UNIX;
strcpy(s_un.sun_path, "/tmp/afunix_text");
使用stream,server端:
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#define FILEPATH "/tmp/afunix_text"
int main(){
int s0, sock;
sockaddr_un s_un;
sockaddr_un s_un_accept;
socklen_t addrlen;
s0 = socket(AF_UNIX, SOCK_STREAM, 0);
if(s0 < 0){
perror("socket");
return 1;
}
s_un.sun_family = AF_UNIX;
strcpy(s_un.sun_path, FILEPATH);
if(bind(s0, (sockaddr*)&s_un, sizeof(s_un)) != 0){
perror("bind");
return 1;
}
if(listen(s0, 5) != 0){
perror("listen");
return 1;
}
addrlen = sizeof(s_un_accept);
sock = accept(s0, (sockaddr*)&s_un_accept, &addrlen);
if(sock < 0){
perror("accept");
return 1;
}
printf("after accept\n");
write(sock, "the msg is send from server", 27);
close(sock);
close(s0);
unlink(FILEPATH);
return 0;
}
github源代码
使用stream,client端:
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
int main(){
int sock;
sockaddr_un s_un;
int n;
char buf[128];
sock = socket(AF_UNIX, SOCK_STREAM, 0);
if(sock < 0){
perror("socket");
return 1;
}
s_un.sun_family = AF_UNIX;
strcpy(s_un.sun_path, "/tmp/afunix_text");
if(connect(sock, (sockaddr*)&s_un, sizeof(s_un)) != 0){
perror("connect");
return 1;
}
printf("after connect\n");
memset(buf, 0, sizeof(buf));
n = read(sock, buf, sizeof(buf));
if(n < 0){
perror("read");
return 1;
}
printf("%s\n", buf);
close(sock);
return 0;
}
github源代码
使用dgram,发送端:
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
int main(){
int sock;
sockaddr_un addr;
socklen_t addrlen;
sock = socket(AF_UNIX, SOCK_DGRAM, 0);
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, "/tmp/afu_dgram");
int n = sendto(sock, "HELLO\n", 6, 0, (sockaddr*)&addr, sizeof(addr));
printf("send data\n");
close(sock);
return 0;
}
github源代码
使用dgram,接收端:
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
int main(){
int sock;
sockaddr_un addr;
socklen_t addrlen;
char buf[1024];
int n;
sock = socket(AF_UNIX, SOCK_DGRAM, 0);
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, "/tmp/afu_dgram");
bind(sock, (sockaddr*)&addr, sizeof(addr));
while(1){
memset(buf, 0, sizeof(buf));
n = recv(sock, buf, sizeof(buf) - 1, 0);
printf("recv:%s\n", buf);
}
close(sock);
return 0;
}
github源代码
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