struct xkb_keymap *keymap;
xcb_connection_t *conn;
int32_t device_id;
- int pipefds[2];
int ret, status;
- char displayfd[128], display[128];
+ char display[512];
char *xkb_path;
char *original, *dump;
char *envp[] = { NULL };
- char *xvfb_argv[] = { "Xvfb", "-displayfd", displayfd, NULL };
+ char *xvfb_argv[] = { "Xvfb", display, NULL };
pid_t xvfb_pid;
char *xkbcomp_argv[] = { "xkbcomp", "-I", NULL /* xkb_path */, display,
NULL };
pid_t xkbcomp_pid;
+ char *xhost;
+ int xdpy_current;
+ int xdpy_candidate;
+
/*
* What all of this mess does is:
- * 1. Launch Xvfb on the next available DISPLAY. Xvfb reports the
- * display number to an fd passed with -displayfd once it's
- * initialized. We pass a pipe there to read it.
+ * 1. Launch Xvfb on available DISPLAY.
* 2. Make an xcb connection to this display.
* 3. Launch xkbcomp to change the keymap of the new display (doing
* this programmatically is major work [which we may yet do some
* 6. Kill the server & clean up.
*/
- ret = pipe(pipefds);
- assert(ret == 0);
-
- ret = snprintf(displayfd, sizeof(displayfd), "%d", pipefds[1]);
- assert(ret >= 0 && ret < sizeof(displayfd));
-
- ret = posix_spawnp(&xvfb_pid, "Xvfb", NULL, NULL, xvfb_argv, envp);
+ ret = xcb_parse_display(NULL, &xhost, &xdpy_current, NULL);
+ assert(ret != 0);
+ /*
+ * IANA assigns TCP port numbers from 6000 through 6063 to X11
+ * clients. In addition, the current XCB implementaion shows
+ * that, when an X11 client tries to establish a TCP connetion,
+ * the port number needed is specified by adding 6000 to a given
+ * display number. So, one of reasonable ranges of xdpy_candidate
+ * is [0, 63].
+ */
+ for (xdpy_candidate = 63; xdpy_candidate >= 0; xdpy_candidate--) {
+ char *buf;
+
+ if (xdpy_candidate == xdpy_current) {
+ continue;
+ }
+ snprintf(display, sizeof(display), "%s:%d", xhost, xdpy_candidate);
+ ret = posix_spawnp(&xvfb_pid, "Xvfb", NULL, NULL, xvfb_argv, envp);
+ if (ret == 0) {
+ break;
+ }
+ }
if (ret != 0) {
ret = SKIP_TEST;
goto err_ctx;
}
- close(pipefds[1]);
-
- display[0] = ':';
- ret = read(pipefds[0], display + 1, sizeof(display) - 1);
- if (ret <= 0 || 1 + ret >= sizeof(display) - 1) {
- ret = SKIP_TEST;
- goto err_xvfd;
- }
- if (display[ret] == '\n')
- display[ret] = '\0';
- display[1 + ret] = '\0';
- close(pipefds[0]);
+ /* Wait for Xvfb fully waking up to accept a connection from a client. */
+ sleep(1);
conn = xcb_connect(display, NULL);
if (xcb_connection_has_error(conn)) {