minix3/lib/libc/sys/getrusage.c

40 lines
831 B
C

#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <string.h>
#include <unistd.h>
#include <sys/resource.h>
int getrusage(int who, struct rusage *r_usage)
{
int rc;
message m;
memset(&m, 0, sizeof(m));
m.m_lc_pm_rusage.who = who;
m.m_lc_pm_rusage.addr = (vir_bytes)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, PM_GETRUSAGE, &m)) < 0)
return rc;
memset(&m, 0, sizeof(m));
m.m_lc_vfs_rusage.addr = (vir_bytes)r_usage;
if ((rc = _syscall(VFS_PROC_NR, VFS_GETRUSAGE, &m)) < 0)
return rc;
memset(&m, 0, sizeof(m));
m.m_lc_vm_rusage.addr = (vir_bytes)r_usage;
return _syscall(VM_PROC_NR, VM_GETRUSAGE, &m);
}