uds_client.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>

int main(int argc, char** argv) {
    int sock;
    int ret;
    struct sockaddr_un my_addr;
    struct sockaddr_un peer_addr;
    char* sock_path;
    ssize_t recv_size;
    char buf[4096];
    if (argc != 2) {
        fprintf(stderr, "usage: %s SOCK_PATH\n", argv[0]);
        exit(EXIT_FAILURE);
    }
    sock_path = argv[1];
    sock = socket(AF_UNIX, SOCK_STREAM, 0);
    if (sock < 0 ) {
        perror("socket");
        exit(EXIT_FAILURE);
    }
    memset(&my_addr, 0, sizeof(my_addr));
    my_addr.sun_family = AF_UNIX;
    strncpy(my_addr.sun_path, sock_path, sizeof(my_addr.sun_path) - 1);
    ret = connect(sock, (struct sockaddr*)&my_addr, sizeof(struct sockaddr_un));
    if (ret < 0) {
        perror("connect");
        exit(EXIT_FAILURE);
    }
    while(1) {
        recv_size = recv(sock, buf, 4096, MSG_PEEK);
        if (recv_size == 0) {
            printf("EOF\n");
            break;
        } else if (recv_size < 0) {
            perror("recv");
            exit(EXIT_FAILURE);
        } else {
            printf("peek: %s\n", buf);
        }
    }
    exit(EXIT_SUCCESS);
}