想写一个本地进程和远程进程通讯的机制.但是总是出现Permission denied

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

#define NSTRS       3           /* no. of strings  */
#define ADDRESS     "\\\\192.168.123.203\\mysocket"  /* addr to connect */

/*
* Strings we send to the client.
*/
char *strs[NSTRS] = {
 "This is the first string from the server.\n",
 "This is the second string from the server.\n",
 "This is the third string from the server.\n"
};

main()
{
 char c;
 FILE *fp;
 int fromlen;
 register int i, s, ns, len;
 struct sockaddr_un saun, fsaun;

 /*
 * Get a socket to work with.  This socket will
 * be in the UNIX domain, and will be a
 * stream socket.
 */
 if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
  perror("server: socket");
  exit(1);
 }

 /*
 * Create the address we will be binding to.
 */
 saun.sun_family = AF_UNIX;
 strcpy(saun.sun_path, ADDRESS);

 /*
 * Try to bind the address to the socket.  We
 * unlink the name first so that the bind won't
 * fail.
 *
 * The third argument indicates the "length" of
 * the structure, not just the length of the
 * socket name.
 */
 unlink(ADDRESS);
 len = sizeof(saun.sun_family) + strlen(saun.sun_path);

 if (bind(s, &saun, len) < 0) {
  perror("server: bind");
  exit(1);
 }

 /*
 * Listen on the socket.
 */
 if (listen(s, 5) < 0) {
  perror("server: listen");
  exit(1);
 }

 /*
 * Accept connections.  When we accept one, ns
 * will be connected to the client.  fsaun will
 * contain the address of the client.
 */
 if ((ns = accept(s, &fsaun, &fromlen)) < 0) {
  perror("server: accept");
  exit(1);
 }

 /*
 * We'll use stdio for reading the socket.
 */
 fp = fdopen(ns, "r");

 /*
 * First we send some strings to the client.
 */
 for (i = 0; i < NSTRS; i++)
  send(ns, strs[i], strlen(strs[i]), 0);

 /*
 * Then we read some strings from the client and
 * print them out.
 */
 for (i = 0; i < NSTRS; i++) {
  while ((c = fgetc(fp)) != EOF) {
   putchar(c);

   if (c == '\n')
    break;
  }
 }

 /*
 * We can simply use close() to terminate the
 * connection, since we're done with both sides.
 */
 close(s);

 exit(0);
}
client:

 

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

#define NSTRS       3           /* no. of strings  */
#define ADDRESS     "\\\\192.168.123.203\\mysocket"  /* addr to connect */

/*
 * Strings we send to the server.
 */
char *strs[NSTRS] = {
    "This is the first string from the client.\n",
    "This is the second string from the client.\n",
    "This is the third string from the client.\n"
};

main()
{
    char c;
    FILE *fp;
    register int i, s, len;
    struct sockaddr_un saun;

    /*
     * Get a socket to work with.  This socket will
     * be in the UNIX domain, and will be a
     * stream socket.
     */
    if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
        perror("client: socket");
        exit(1);
    }

    /*
     * Create the address we will be connecting to.
     */
    saun.sun_family = AF_UNIX;
    strcpy(saun.sun_path, ADDRESS);

    /*
     * Try to connect to the address.  For this to
     * succeed, the server must already have bound
     * this address, and must have issued a listen()
     * request.
     *
     * The third argument indicates the "length" of
     * the structure, not just the length of the
     * socket name.
     */
    len = sizeof(saun.sun_family) + strlen(saun.sun_path);

    if (connect(s, &saun, len) < 0) {
        perror("client: connect");
        exit(1);
    }

    /*
     * We'll use stdio for reading
     * the socket.
     */
    fp = fdopen(s, "r");

    /*
     * First we read some strings from the server
     * and print them out.
     */
    for (i = 0; i < NSTRS; i++) {
        while ((c = fgetc(fp)) != EOF) {
            putchar(c);

            if (c == '\n')
                break;
        }
    }

    /*
     * Now we send some strings to the server.
     */
    for (i = 0; i < NSTRS; i++)
        send(s, strs[i], strlen(strs[i]), 0);

    /*
     * We can simply use close() to terminate the
     * connection, since we're done with both sides.
     */
    close(s);

    exit(0);
}

这里的权限被拒绝是因为这个文件只有root用户能访问,其他用户不能访问