Services: Move to Userland/Services/

Userland/Services/CrashDaemon/main.cpp

@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/LexicalPath.h>
+#include <LibCore/DirectoryWatcher.h>
+#include <LibCoreDump/Backtrace.h>
+#include <LibCoreDump/Reader.h>
+#include <serenity.h>
+#include <spawn.h>
+#include <sys/stat.h>
+#include <time.h>
+#include <unistd.h>
+
+static void wait_until_coredump_is_ready(const String& coredump_path)
+{
+    while (true) {
+        struct stat statbuf;
+        if (stat(coredump_path.characters(), &statbuf) < 0) {
+            perror("stat");
+            ASSERT_NOT_REACHED();
+        }
+        if (statbuf.st_mode & 0400) // Check if readable
+            break;
+
+        usleep(10000); // sleep for 10ms
+    }
+}
+
+static void print_backtrace(const String& coredump_path)
+{
+    auto coredump = CoreDump::Reader::create(coredump_path);
+    if (!coredump) {
+        dbgln("Could not open coredump '{}'", coredump_path);
+        return;
+    }
+    for (auto& entry : coredump->backtrace().entries())
+        dbgln("{}", entry.to_string(true));
+}
+
+static void launch_crash_reporter(const String& coredump_path)
+{
+    pid_t child;
+    const char* argv[] = { "CrashReporter", coredump_path.characters(), nullptr, nullptr };
+    if ((errno = posix_spawn(&child, "/bin/CrashReporter", nullptr, nullptr, const_cast<char**>(argv), environ))) {
+        perror("posix_spawn");
+    } else {
+        if (disown(child) < 0)
+            perror("disown");
+    }
+}
+
+int main()
+{
+    if (pledge("stdio rpath proc exec", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    Core::DirectoryWatcher watcher { "/tmp/coredump" };
+    while (true) {
+        auto event = watcher.wait_for_event();
+        ASSERT(event.has_value());
+        if (event.value().type != Core::DirectoryWatcher::Event::Type::ChildAdded)
+            continue;
+        auto coredump_path = event.value().child_path;
+        dbgln("New coredump file: {}", coredump_path);
+        wait_until_coredump_is_ready(coredump_path);
+        print_backtrace(coredump_path);
+        launch_crash_reporter(coredump_path);
+    }
+}