minix/lib/libc/sys-minix/getrusage.c
Xiaoguang Sun 64f10ee644 Implement getrusage
Implement getrusage.
These fields of struct rusage are not supported and always set to zero at this time
long ru_nswap;           /* swaps */
long ru_inblock;         /* block input operations */
long ru_oublock;         /* block output operations */
long ru_msgsnd;          /* messages sent */
long ru_msgrcv;          /* messages received */
long ru_nvcsw;           /* voluntary context switches */
long ru_nivcsw;          /* involuntary context switches */

test75.c is the unit test for this new function

Change-Id: I3f1eb69de1fce90d087d76773b09021fc6106539
2013-07-01 23:00:47 +02:00

32 lines
659 B
C

#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <unistd.h>
#include <sys/resource.h>
int getrusage(int who, struct rusage *r_usage)
{
int rc;
message m;
m.RU_WHO = who;
m.RU_RUSAGE_ADDR = r_usage;
if (r_usage == NULL) {
errno = EFAULT;
return -1;
}
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) {
errno = EINVAL;
return -1;
}
memset(r_usage, 0, sizeof(struct rusage));
if ((rc = _syscall(PM_PROC_NR, GETRUSAGE, &m)) < 0)
return rc;
m.RU_RUSAGE_ADDR = r_usage;
if ((rc = _syscall(VFS_PROC_NR, GETRUSAGE, &m)) < 0)
return rc;
m.RU_RUSAGE_ADDR = r_usage;
return _syscall(VM_PROC_NR, VM_GETRUSAGE, &m);
}