sandbox/linux/suid/process_util.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // The following is duplicated from base/process_utils.h.
   6 // We shouldn't link against C++ code in a setuid binary.
   7
   8 #ifndef SANDBOX_LINUX_SUID_PROCESS_UTIL_H_
   9 #define SANDBOX_LINUX_SUID_PROCESS_UTIL_H_
  10
  11 #include <stdbool.h>
  12 #include <sys/types.h>
  13
  14 // This adjusts /proc/process/oom_score_adj so the Linux OOM killer
  15 // will prefer certain process types over others. The range for the
  16 // adjustment is [-1000, 1000], with [0, 1000] being user accessible.
  17 //
  18 // If the Linux system isn't new enough to use oom_score_adj, then we
  19 // try to set the older oom_adj value instead, scaling the score to
  20 // the required range of [0, 15]. This may result in some aliasing of
  21 // values, of course.
  22 bool AdjustOOMScore(pid_t process, int score);
  23
  24 // This adjusts /sys/kernel/mm/chromeos-low_mem/margin so that
  25 // the kernel notifies us that we are low on memory when less than
  26 // |margin_mb| megabytes are available.  Setting |margin_mb| to -1
  27 // turns off low memory notification.
  28 bool AdjustLowMemoryMargin(int64_t margin_mb);
  29
  30 #endif  // SANDBOX_LINUX_SUID_PROCESS_UTIL_H_