git.distorted.org.uk Git - u/mdw/putty/blob - unix/ux_x11.c

   1 /*
   2  * ux_x11.c: fetch local auth data for X forwarding.
   3  */
   4
   5 #include <ctype.h>
   6 #include <unistd.h>
   7 #include <assert.h>
   8 #include <stdlib.h>
   9
  10 #include "putty.h"
  11 #include "ssh.h"
  12 #include "network.h"
  13
  14 void platform_get_x11_auth(struct X11Display *disp, const Config *cfg)
  15 {
  16     char *xauthfile;
  17     int needs_free;
  18
  19     /*
  20      * Upgrade an IP-style localhost display to a Unix-socket
  21      * display.
  22      */
  23     if (!disp->unixdomain && sk_address_is_local(disp->addr)) {
  24         sk_addr_free(disp->addr);
  25         disp->unixdomain = TRUE;
  26         disp->addr = platform_get_x11_unix_address(NULL, disp->displaynum);
  27         disp->realhost = dupprintf("unix:%d", disp->displaynum);
  28         disp->port = 0;
  29     }
  30
  31     /*
  32      * Set the hostname for Unix-socket displays, so that we'll
  33      * look it up correctly in the X authority file.
  34      */
  35     if (disp->unixdomain) {
  36         int len;
  37
  38         sfree(disp->hostname);
  39         len = 128;
  40         do {
  41             len *= 2;
  42             disp->hostname = snewn(len, char);
  43             if (gethostname(disp->hostname, len) < 0) {
  44                 disp->hostname = NULL;
  45                 return;
  46             }
  47         } while (strlen(disp->hostname) >= len-1);
  48     }
  49
  50     /*
  51      * Find the .Xauthority file.
  52      */
  53     needs_free = FALSE;
  54     xauthfile = getenv("XAUTHORITY");
  55     if (!xauthfile) {
  56         xauthfile = getenv("HOME");
  57         if (xauthfile) {
  58             xauthfile = dupcat(xauthfile, "/.Xauthority", NULL);
  59             needs_free = TRUE;
  60         }
  61     }
  62
  63     if (xauthfile) {
  64         x11_get_auth_from_authfile(disp, xauthfile);
  65         if (needs_free)
  66             sfree(xauthfile);
  67     }
  68 }
  69
  70 const int platform_uses_x11_unix_by_default = TRUE;