15b3d77268
Implement the adjtime() system call and add a test for it to test69. Additionally, install the adjtime.2 and clock_*.2 man pages.
37 lines
903 B
C
37 lines
903 B
C
#include <sys/cdefs.h>
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#include <lib.h>
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#include "namespace.h"
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#include <sys/time.h>
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#include <time.h>
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#ifdef __weak_alias
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__weak_alias(adjtime, __adjtime50);
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#endif
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int adjtime(const struct timeval *delta, struct timeval *olddelta)
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{
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message m;
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m.m2_i2 = 0; /* use adjtime() method to slowly adjust the clock. */
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m.m2_i1 = (clockid_t) CLOCK_REALTIME;
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m.m2_l1 = (time_t) delta->tv_sec;
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m.m2_l2 = (long) delta->tv_usec * 1000; /* convert usec to nsec */
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if (_syscall(PM_PROC_NR, CLOCK_SETTIME, &m) < 0)
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return -1;
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if (olddelta != NULL) {
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/* the kernel returns immediately and the adjustment happens in the
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* background. Also, any currently running adjustment is stopped by
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* another call to adjtime(2), so the only values possible on Minix
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* for olddelta are those of delta.
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*/
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olddelta->tv_sec = delta->tv_sec;
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olddelta->tv_usec = delta->tv_usec;
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}
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return 0;
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}
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