Closing Unix domain sockets does not clean up the socket path

test.c

/*
  gcc -std=c99 -o test test.c

  ./test foobar
*/

#include <stdio.h>
#include <string.h>

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

int main(int argc, char* argv[]) {
  if (argc < 2) {
    printf("usage: %s <socket-path>\n", argv[0]);
    return 1;
  }

  int fd = socket(PF_LOCAL, SOCK_STREAM, 0);
  if (fd < 0) {
    perror("socket");
    return 1;
  }

  struct sockaddr_un addr;
  addr.sun_len = strlen(argv[1]);
  addr.sun_family = AF_UNIX;
  strcpy(addr.sun_path, argv[1]);

  if (bind(fd, (struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0) {
    perror("bind");
    return 1;
  }

  if (close(fd) < 0) {
    perror("close");
    return 1;
  }

  return 0;
}