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Add getrusage(3).

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This commit is contained in:
Jonas 'Sortie' Termansen 2013-08-31 01:17:43 +02:00
parent 7a5e549612
commit efc0eb2829
3 changed files with 72 additions and 0 deletions
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1
libc/Makefile
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@ -310,6 +310,7 @@ sys/mman/munmap.o \
sys/readdirents/readdirents.o \
sys/resource/getpriority.o \
sys/resource/getrlimit.o \
sys/resource/getrusage.o \
sys/resource/prlimit.o \
sys/resource/setpriority.o \
sys/resource/setrlimit.o \

13
libc/include/sys/resource.h
View file

@ -32,9 +32,22 @@ __BEGIN_DECLS
@include(id_t.h)
@include(pid_t.h)
@include(time_t.h)
@include(suseconds_t.h)
@include(timeval.h)
#define RUSAGE_SELF 0
#define RUSAGE_CHILDREN 1
struct rusage
{
struct timeval ru_utime;
struct timeval ru_stime;
};
int getpriority(int, id_t);
int getrlimit(int, struct rlimit*);
int getrusage(int, struct rusage*);
int prlimit(pid_t, int, const struct rlimit*, struct rlimit*);
int setpriority(int, id_t, int);
int setrlimit(int, const struct rlimit*);

58
libc/sys/resource/getrusage.cpp Normal file
View file

@ -0,0 +1,58 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
sys/resource/getrusage.cpp
Get resource usage statistics.
*******************************************************************************/
#include <sys/resource.h>
#include <sys/syscall.h>
#include <errno.h>
#include <time.h>
#include <timespec.h>
static struct timeval timeval_of_timespec(struct timespec ts)
{
struct timeval tv;
tv.tv_sec = ts.tv_sec;
tv.tv_usec = ts.tv_nsec / 1000;
return tv;
}
extern "C" int getrusage(int who, struct rusage* usage)
{
struct tmns tmns;
if ( timens(&tmns) != 0 )
return -1;
if ( who == RUSAGE_SELF )
{
usage->ru_utime = timeval_of_timespec(tmns.tmns_utime);
usage->ru_stime = timeval_of_timespec(tmns.tmns_stime);
}
else if ( who == RUSAGE_CHILDREN )
{
usage->ru_utime = timeval_of_timespec(tmns.tmns_cutime);
usage->ru_stime = timeval_of_timespec(tmns.tmns_cstime);
}
else
return errno = EINVAL, -1;
return 0;
}