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}