socket unix domain IPC的实例代码
仅供参考：
服务端：socket->bind->listen->send/recv->close
客户端：socket->bind->connect->send/recv->close
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#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/un.h>
#include <pthread.h>
#include <cstring>
#include <cstdio>
#include <unistd.h>
#include <signal.h>
#define filename "test.socket"
void setnonblocking(int fd)
{
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
}
void *client_func(void *arg)
{
sleep(3);
int fd = socket(AF_UNIX, SOCK_STREAM, 0);
setnonblocking(fd);
sockaddr_un un;
memset(&un, 0, sizeof(un));
un.sun_family = AF_UNIX;
sprintf(un.sun_path, "file_%d.socket", (int)getpid());
unlink(un.sun_path);
socklen_t len = sizeof(un);
bind(fd, (sockaddr *)&un, sizeof(un));
strcpy(un.sun_path, filename);
int ret = connect(fd, (sockaddr *)&un, len);
if (ret == -1)
{
printf("connect server failed...\n");
close(fd);
return NULL;
}
char buf[256];
memset(buf, 0, sizeof(buf));
strcpy(buf, "hello world");
int n = send(fd, buf, strlen(buf)+1, 0);
printf("send data, %d bytes..\n", n);
sleep(5);
close(fd);
return NULL;
}
int main()
{
unlink(filename);
signal(SIGPIPE, SIG_IGN);
int fd = socket(AF_UNIX, SOCK_STREAM, 0);
int yes = 1;
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
setnonblocking(fd);
sockaddr_un un;
memset(&un, 0, sizeof(un));
un.sun_family = AF_UNIX;
strcpy(un.sun_path, filename);
bind(fd, (sockaddr *)&un, sizeof(un));
listen(fd, 100);
pthread_t pid;
pthread_create(&pid, NULL, client_func, NULL);
sockaddr_un uu;
socklen_t len = sizeof(uu);
while (true)
{
memset(&uu, 0, len);
int newfd = accept(fd, (sockaddr *)&uu, &len);
if (newfd != -1)
{
setnonblocking(newfd);
printf("newfd = %d, path = %s\n", newfd, uu.sun_path);
char buf[512];
memset(buf, 0, sizeof(buf));
int n = recv(newfd, buf, 512,0);
printf("recv %d bytes, contents is %s\n", n, buf);
}
usleep(100000);
}
close(fd);
return 0;
}
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