chromium/sandbox/linux/suid/process_util_linux.c

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// The following is the C version of code from base/process_utils_linux.cc.
// We shouldn't link against C++ code in a setuid binary.

// Needed for O_DIRECTORY, must be defined before fcntl.h is included
// (and it can be included earlier than the explicit #include below
// in some versions of glibc).
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include "sandbox/linux/suid/process_util.h"

#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

// Ranges for the current (oom_score_adj) and previous (oom_adj)
// flavors of OOM score.
static const int kMaxOomScore = …;
static const int kMaxOldOomScore = …;

// NOTE: This is not the only version of this function in the source:
// the base library (in process_util_linux.cc) also has its own C++ version.
bool AdjustOOMScore(pid_t process, int score) { … }