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diff --git a/Libraries/LibCore/ProcessStatisticsReader.h b/Libraries/LibCore/ProcessStatisticsReader.h
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+++ b/Libraries/LibCore/ProcessStatisticsReader.h
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+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * 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.
+ */
+
+#pragma once
+
+#include <AK/HashMap.h>
+#include <AK/String.h>
+#include <unistd.h>
+
+namespace Core {
+
+struct ThreadStatistics {
+    int tid;
+    unsigned times_scheduled;
+    unsigned ticks;
+    unsigned syscall_count;
+    unsigned inode_faults;
+    unsigned zero_faults;
+    unsigned cow_faults;
+    unsigned unix_socket_read_bytes;
+    unsigned unix_socket_write_bytes;
+    unsigned ipv4_socket_read_bytes;
+    unsigned ipv4_socket_write_bytes;
+    unsigned file_read_bytes;
+    unsigned file_write_bytes;
+    String state;
+    u32 priority;
+    u32 effective_priority;
+    String name;
+};
+
+struct ProcessStatistics {
+    // Keep this in sync with /proc/all.
+    // From the kernel side:
+    pid_t pid;
+    unsigned pgid;
+    unsigned pgp;
+    unsigned sid;
+    uid_t uid;
+    gid_t gid;
+    pid_t ppid;
+    unsigned nfds;
+    String name;
+    String tty;
+    String pledge;
+    String veil;
+    size_t amount_virtual;
+    size_t amount_resident;
+    size_t amount_shared;
+    size_t amount_dirty_private;
+    size_t amount_clean_inode;
+    size_t amount_purgeable_volatile;
+    size_t amount_purgeable_nonvolatile;
+    int icon_id;
+
+    Vector<Core::ThreadStatistics> threads;
+
+    // synthetic
+    String username;
+};
+
+class ProcessStatisticsReader {
+public:
+    static HashMap<pid_t, Core::ProcessStatistics> get_all();
+
+private:
+    static String username_from_uid(uid_t);
+    static HashMap<uid_t, String> s_usernames;
+};
+
+}