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Root user gets proper privilege

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This commit is contained in:
hoholee12 2023-07-25 15:53:40 +09:00
parent db4c960a3b
commit 445bae198b
1 changed files with 21 additions and 6 deletions
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27
Utilities/Thread.cpp
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@ -3032,16 +3032,31 @@ void thread_ctrl::set_native_priority(int priority)
}
#elif defined(__linux__)
// available niceness for nonroot: 0~19
int linuxprio = 9;
// available niceness for root: -20~19
int linuxprio = 0;
id_t threadpid = gettid();
if (priority > 0)
uid_t euid = geteuid();
if (euid == 0)
{
linuxprio = 0;
else if (priority < 0)
linuxprio = 19;
if (priority > 0)
linuxprio = -6;
else if (priority < 0)
linuxprio = 6;
}
else
{
linuxprio = 6;
if (priority > 0)
linuxprio = 0;
else if (priority < 0)
linuxprio = 12;
}
// nonroot cannot increase niceness value
if (getpriority(PRIO_PROCESS, threadpid) < linuxprio)
if ((getpriority(PRIO_PROCESS, threadpid) < linuxprio) || (euid == 0))
{
if (int err = setpriority(PRIO_PROCESS, threadpid, linuxprio))
{