minix/lib/libc/sys-minix/getrusage.c
David van Moolenbroek 24ec0d73b5 Clean up interface to PM and VFS
- introduce new call numbers, names, and field aliases;
- initialize request messages to zero for all ABI calls;
- format callnr.h in the same way as com.h;
- redo call tables in both servers;
- remove param.h namespace pollution in the servers;
- make brk(2) go to VM directly, rather than through PM;
- remove obsolete BRK, UTIME, and WAIT calls;
- clean up path copying routine in VFS;
- move remaining system calls from libminlib to libc;
- correct some errno-related mistakes in libc routines.

Change-Id: I2d8ec5d061cd7e0b30c51ffd77aa72ebf84e2565
2014-03-01 09:05:01 +01:00

39 lines
797 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.RU_WHO = who;
m.RU_RUSAGE_ADDR = (char *) 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.RU_RUSAGE_ADDR = (char *) r_usage;
if ((rc = _syscall(VFS_PROC_NR, VFS_GETRUSAGE, &m)) < 0)
return rc;
memset(&m, 0, sizeof(m));
m.RU_RUSAGE_ADDR = (char *) r_usage;
return _syscall(VM_PROC_NR, VM_GETRUSAGE, &m);
}