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发信人: althea (稻草人), 信区: Linux
标  题: [part 3] epclient.c
发信站: BBS 水木清华站 (Fri Dec 29 23:51:41 2000)

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

int main()
{
    char *display_name;
    char socket_file_name[64];
    int  sock;
    struct sockaddr_un name;
    size_t nbytes, size;

    nbytes = strlen (getenv("DISPLAY"));
    if (nbytes<=0) {
        perror ("DISPLAY");
        exit (1);
    }

    display_name = malloc (nbytes+1);
    sprintf (display_name, "%s\n", getenv("DISPLAY"));

    /* Create the socket. */
    sock = socket (PF_LOCAL, SOCK_DGRAM, 0);
    if (sock < 0)
    {
        perror ("socket");
        exit (EXIT_FAILURE);
    }

    snprintf (socket_file_name, 64, "/tmp/ep-%d", (int) geteuid());
    name.sun_family = AF_LOCAL;
    strncpy (name.sun_path, socket_file_name, sizeof (name.sun_path));
    size = SUN_LEN (&name);

    if (sendto (sock, display_name, nbytes+1, 0, &name, size) < 0) {
        perror ("sendto");
        exit (1);
    }

    return 0;
}

--
Look Ma, this man can twist his fingers as if they were made of rubber,
isn't that amazing? -- Not really, he's been using emacs for years...!

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