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030046a2a8
do this if the supplied buffer isn't big enough, which shouldn't lead to complete abandonment of X11 auth. (Would only have bitten with hostnames >255 chars anyway.) [originally from svn r8383]
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/*
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* ux_x11.c: fetch local auth data for X forwarding.
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*/
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#include <ctype.h>
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#include <unistd.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "putty.h"
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#include "ssh.h"
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#include "network.h"
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void platform_get_x11_auth(struct X11Display *disp, const Config *cfg)
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{
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char *xauthfile;
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int needs_free;
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/*
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* Upgrade an IP-style localhost display to a Unix-socket
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* display.
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*/
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if (!disp->unixdomain && sk_address_is_local(disp->addr)) {
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sk_addr_free(disp->addr);
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disp->unixdomain = TRUE;
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disp->addr = platform_get_x11_unix_address(NULL, disp->displaynum);
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disp->realhost = dupprintf("unix:%d", disp->displaynum);
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disp->port = 0;
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}
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/*
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* Set the hostname for Unix-socket displays, so that we'll
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* look it up correctly in the X authority file.
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*/
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if (disp->unixdomain) {
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int len;
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sfree(disp->hostname);
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len = 128;
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do {
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len *= 2;
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disp->hostname = snewn(len, char);
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if ((gethostname(disp->hostname, len) < 0) &&
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(errno != ENAMETOOLONG)) {
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disp->hostname = NULL;
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return;
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}
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} while (strlen(disp->hostname) >= len-1);
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}
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/*
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* Find the .Xauthority file.
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*/
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needs_free = FALSE;
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xauthfile = getenv("XAUTHORITY");
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if (!xauthfile) {
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xauthfile = getenv("HOME");
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if (xauthfile) {
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xauthfile = dupcat(xauthfile, "/.Xauthority", NULL);
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needs_free = TRUE;
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}
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}
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if (xauthfile) {
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x11_get_auth_from_authfile(disp, xauthfile);
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if (needs_free)
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sfree(xauthfile);
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}
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}
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const int platform_uses_x11_unix_by_default = TRUE;
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