mpv ipc socket client

mpv-socket-client.c

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

int main() {
  int sockfd = socket(PF_UNIX, SOCK_STREAM, 0);
  struct sockaddr_un addr = {0};

  if (sockfd < 0) {
    perror("socket");
    return 1;
  }

  addr.sun_family = AF_UNIX;
  strcpy(addr.sun_path, "/tmp/mptv-mpv.sock");

  if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(addr)) == -1) {
    perror("connect");
    return 1;
  }

  // \n newline must be present at the end of json command to terminate it,
  // otherwise MPV would not execute it.
  const char* cmd = "{\"command\":[\"set_property\",\"volume\",\"0\"]}\n";
  ssize_t sent = send(sockfd, cmd, strlen(cmd), 0);
  printf("sent: %l\n", sent);

  close(sockfd);
  return 0;
}