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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// This is a small program that tries to connect to the X server. It
// continually retries until it connects or 5 seconds pass. If it fails
// to connect to the X server after 5 seconds, it returns an error code
// of -1.
//
// This is to help verify that the X server is available before we start
// start running tests on the build bots.
#include <errno.h>
#include <stdio.h>
#include <time.h>
#include <X11/Xlib.h>
#if defined(USE_AURA)
#include <X11/extensions/XInput2.h>
#endif
void Sleep(int duration_ms) {
struct timespec sleep_time, remaining;
// Contains the portion of duration_ms >= 1 sec.
sleep_time.tv_sec = duration_ms / 1000;
duration_ms -= sleep_time.tv_sec * 1000;
// Contains the portion of duration_ms < 1 sec.
sleep_time.tv_nsec = duration_ms * 1000 * 1000; // nanoseconds.
while (nanosleep(&sleep_time, &remaining) == -1 && errno == EINTR)
sleep_time = remaining;
}
int main(int argc, char* argv[]) {
int kNumTries = 50; // 49*48/2 * 10 = 12.25s of waiting
Display* display = NULL;
int tries;
for (tries = 0; tries < kNumTries; ++tries) {
display = XOpenDisplay(NULL);
if (display)
break;
Sleep(10 * tries);
}
if (!display) {
fprintf(stderr, "Failed to connect to %s\n", XDisplayName(NULL));
return -1;
}
fprintf(stderr, "Connected after %d retries\n", tries);
#if defined(USE_AURA)
// Check for XInput2
int opcode, event, err;
if (!XQueryExtension(display, "XInputExtension", &opcode, &event, &err)) {
fprintf(stderr,
"Failed to get XInputExtension on %s.\n", XDisplayName(NULL));
return -1;
}
int major = 2, minor = 0;
if (XIQueryVersion(display, &major, &minor) == BadRequest) {
fprintf(stderr,
"Server does not have XInput2 on %s.\n", XDisplayName(NULL));
return -1;
}
// Ask for the list of devices. This can cause some Xvfb to crash.
int count = 0;
XIDeviceInfo* devices = XIQueryDevice(display, XIAllDevices, &count);
if (devices)
XIFreeDeviceInfo(devices);
fprintf(stderr,
"XInput2 verified initially sane on %s.\n", XDisplayName(NULL));
#endif
return 0;
}
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