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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2017 - ROLI Ltd.
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
/*
Note that a lot of methods that you'd expect to find in this file actually
live in juce_posix_SharedCode.h!
*/
//==============================================================================
JUCE_API void JUCE_CALLTYPE Process::setPriority (const ProcessPriority prior)
{
const int policy = (prior <= NormalPriority) ? SCHED_OTHER : SCHED_RR;
const int minp = sched_get_priority_min (policy);
const int maxp = sched_get_priority_max (policy);
struct sched_param param;
switch (prior)
{
case LowPriority:
case NormalPriority: param.sched_priority = 0; break;
case HighPriority: param.sched_priority = minp + (maxp - minp) / 4; break;
case RealtimePriority: param.sched_priority = minp + (3 * (maxp - minp) / 4); break;
default: jassertfalse; break;
}
pthread_setschedparam (pthread_self(), policy, ¶m);
}
static bool swapUserAndEffectiveUser()
{
int result1 = setreuid (geteuid(), getuid());
int result2 = setregid (getegid(), getgid());
return result1 == 0 && result2 == 0;
}
JUCE_API void JUCE_CALLTYPE Process::raisePrivilege() { if (geteuid() != 0 && getuid() == 0) swapUserAndEffectiveUser(); }
JUCE_API void JUCE_CALLTYPE Process::lowerPrivilege() { if (geteuid() == 0 && getuid() != 0) swapUserAndEffectiveUser(); }
} // namespace juce
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