i3/libi3/ipc_connect.c

/*
 * vim:ts=4:sw=4:expandtab
 *
 * i3 - an improved dynamic tiling window manager
 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
 *
 */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <string.h>
#include <err.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>

#include "libi3.h"

/*
 * Connects to the i3 IPC socket and returns the file descriptor for the
 * socket. die()s if anything goes wrong.
 *
 */
int ipc_connect(const char *socket_path) {
    int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
    if (sockfd == -1)
        err(EXIT_FAILURE, "Could not create socket");

    (void)fcntl(sockfd, F_SETFD, FD_CLOEXEC);

    struct sockaddr_un addr;
    memset(&addr, 0, sizeof(struct sockaddr_un));
    addr.sun_family = AF_LOCAL;
    strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
    if (connect(sockfd, (const struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
        err(EXIT_FAILURE, "Could not connect to i3");

    return sockfd;
}