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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 30 seconds pass. If it fails
// to connect to the X server or fails to find needed functiona, it returns
// an error code of -1.
//
// This is to help verify that a useful X server is available before we start
// start running tests on the build bots.
#include <errno.h>
#include <stdio.h>
#include <string.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;
}
class XScopedDisplay {
public:
XScopedDisplay() : display_(NULL) {}
~XScopedDisplay() {
if (display_) XCloseDisplay(display_);
}
void set(Display* display) { display_ = display; }
Display* display() { return display_; }
private:
Display* display_;
};
int main(int argc, char* argv[]) {
XScopedDisplay scoped_display;
if (argv[1] && strcmp(argv[1], "--noserver") == 0) {
scoped_display.set(XOpenDisplay(NULL));
if (scoped_display.display()) {
fprintf(stderr, "Found unexpected connectable display %s\n",
XDisplayName(NULL));
}
// Return success when we got an unexpected display so that the code
// without the --noserver is the same, but slow, rather than inverted.
return !scoped_display.display();
}
int kNumTries = 78; // 78*77/2 * 10 = 30s of waiting
int tries;
for (tries = 0; tries < kNumTries; ++tries) {
scoped_display.set(XOpenDisplay(NULL));
if (scoped_display.display())
break;
Sleep(10 * tries);
}
if (!scoped_display.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(scoped_display.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(scoped_display.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(scoped_display.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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