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#include <config.h>
#include <stdio.h>
#include <sys/resource.h> /* our private version */
#include "ntp_stdlib.h"
#include "ntp_syslog.h"
#include "ntp_debug.h"
#include "ntp_fp.h"
#include "ntp.h"
#include "clockstuff.h"
/*
* setpriority
*
* to reduce the #ifdef forest in the portable code,
* we emulate the BSD setpriority interface:
*
* if (-1 == setpriority(PRIO_PROCESS, 0, NTP_PRIO))
* msyslog(LOG_ERR, "setpriority() error: %m");
*
* However, since the Windows port of ntpd has always raised its
* priority (to realtime if allowed, or silently downgraded to
* high by the system if not) with or without -N. Changing that
* now would endanger users who upgrade the binary without adding
* -N to its invocation. Instsrv assumes ntpd.exe is installed
* with no command-line arguments.
*
* This routine is used by utilities as well as ntpd itself, so
* it checks if the priority is already high or realtime and
* logs no complaints in that case, to avoid duplicating. ntpd
* will have raised the priority to one of those in
* init_winnt_time, while the utilities will rely on this
* code.
*
*/
int setpriority(
int which,
int who,
int prio
)
{
BOOL success;
DWORD prio_class;
if (PRIO_PROCESS != which || who || NTP_PRIO != prio)
TRACE(1, ("windows setpriority() clone needs work.\n"));
prio_class = GetPriorityClass(GetCurrentProcess());
if (HIGH_PRIORITY_CLASS == prio_class ||
REALTIME_PRIORITY_CLASS == prio_class)
return 0;
success = SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS);
if (!success) {
msyslog(LOG_ERR, "Unable to raise priority: %m");
errno = EPERM;
return -1;
}
prio_class = GetPriorityClass(GetCurrentProcess());
if (REALTIME_PRIORITY_CLASS == prio_class)
msyslog(LOG_INFO, "Raised to realtime priority class");
else if (HIGH_PRIORITY_CLASS == prio_class)
msyslog(LOG_ERR, "Raised to high priority class, realtime "
"requires Increase Scheduling Priority "
"privilege (enabled with secpol.msc).");
else
msyslog(LOG_ERR, "Unexpected process priority class %d",
prio_class);
return 0;
}
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