e8e506f2a0
clock_t is currently a signed type, but in NetBSD this is not the case. As we plan on aligning our types we have to change this as this prevents negative delta from being correctly used. Change-Id: I9bccdee2b41626b0262471dc1900de505a1991a7
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/* The kernel call implemented in this file:
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* m_type: SYS_SETTIME
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*
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* The parameters for this kernel call are:
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* m4_l2: T_SETTIME_NOW
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* m4_l3: T_CLOCK_ID
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* m4_l4: T_TIME_SEC
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* m4_l5: T_TIME_NSEC
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*/
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#include "kernel/system.h"
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#include <minix/endpoint.h>
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#include <time.h>
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/*===========================================================================*
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* do_settime *
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*===========================================================================*/
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int do_settime(struct proc * caller, message * m_ptr)
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{
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clock_t newclock;
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int32_t ticks;
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time_t timediff;
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signed long long timediff_ticks;
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if (m_ptr->T_CLOCK_ID != CLOCK_REALTIME) /* only realtime can change */
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return EINVAL;
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if (m_ptr->T_SETTIME_NOW == 0) { /* user just wants to adjtime() */
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/* convert delta value from seconds and nseconds to ticks */
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ticks = (m_ptr->T_TIME_SEC * system_hz) +
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(m_ptr->T_TIME_NSEC/(1000000000/system_hz));
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set_adjtime_delta(ticks);
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return(OK);
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} /* else user wants to set the time */
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timediff = m_ptr->T_TIME_SEC - boottime;
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timediff_ticks = (signed long long) timediff * system_hz;
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/* prevent a negative value for realtime */
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if (m_ptr->T_TIME_SEC <= boottime ||
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timediff_ticks < LONG_MIN/2 || timediff_ticks > LONG_MAX/2) {
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/* boottime was likely wrong, try to correct it. */
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boottime = m_ptr->T_TIME_SEC;
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set_realtime(1);
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return(OK);
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}
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/* calculate the new value of realtime in ticks */
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newclock = timediff_ticks + (m_ptr->T_TIME_NSEC/(1000000000/system_hz));
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set_realtime(newclock);
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return(OK);
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}
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