1#include <sys/resource.h>
 2#include <string.h>
 3#include <errno.h>
 4#include "syscall.h"
 5
 6int getrusage(int who, struct rusage *ru)
 7{
 8	int r;
 9#ifdef SYS_getrusage_time64
10	long long kru64[18];
11	r = __syscall(SYS_getrusage_time64, who, kru64);
12	if (!r) {
13		ru->ru_utime = (struct timeval)
14			{ .tv_sec = kru64[0], .tv_usec = kru64[1] };
15		ru->ru_stime = (struct timeval)
16			{ .tv_sec = kru64[2], .tv_usec = kru64[3] };
17		char *slots = (char *)&ru->ru_maxrss;
18		for (int i=0; i<14; i++)
19			*(long *)(slots + i*sizeof(long)) = kru64[4+i];
20	}
21	if (SYS_getrusage_time64 == SYS_getrusage || r != -ENOSYS)
22		return __syscall_ret(r);
23#endif
24	char *dest = (char *)&ru->ru_maxrss - 4*sizeof(long);
25	r = __syscall(SYS_getrusage, who, dest);
26	if (!r && sizeof(time_t) > sizeof(long)) {
27		long kru[4];
28		memcpy(kru, dest, 4*sizeof(long));
29		ru->ru_utime = (struct timeval)
30			{ .tv_sec = kru[0], .tv_usec = kru[1] };
31		ru->ru_stime = (struct timeval)
32			{ .tv_sec = kru[2], .tv_usec = kru[3] };
33	}
34	return __syscall_ret(r);
35}