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/* $Id$ */
/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
LibGTop is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
LibGTop 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public
License along with LibGTop; see the file COPYING.LIB. If not, write
to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <osreldate.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/proctime.h>
#include <glibtop_suid.h>
static const unsigned long _glibtop_sysdeps_proc_time =
(1 << GLIBTOP_PROC_TIME_RTIME) + (1 << GLIBTOP_PROC_TIME_FREQUENCY);
static const unsigned long _glibtop_sysdeps_proc_time_user =
(1 << GLIBTOP_PROC_TIME_UTIME) + (1 << GLIBTOP_PROC_TIME_STIME) +
(1 << GLIBTOP_PROC_TIME_CUTIME) + (1 << GLIBTOP_PROC_TIME_CSTIME);
#define tv2sec(tv) (((u_int64_t) tv.tv_sec * 1000000) + (u_int64_t) tv.tv_usec)
/* Init function. */
void
glibtop_init_proc_time_p (glibtop *server)
{
server->sysdeps.proc_time = _glibtop_sysdeps_proc_time |
_glibtop_sysdeps_proc_time_user;
}
/* Taken from /usr/src/sys/kern/kern_resource.c */
/*
* Transform the running time and tick information in proc p into user,
* system, and interrupt time usage.
*/
static void
calcru(p, up, sp, ip)
struct proc *p;
struct timeval *up;
struct timeval *sp;
struct timeval *ip;
{
quad_t totusec;
u_quad_t u, st, ut, it, tot;
#if (__FreeBSD_version < 300003)
long sec, usec;
#endif
struct timeval tv;
st = p->p_sticks;
ut = p->p_uticks;
it = p->p_iticks;
tot = st + ut + it;
if (tot == 0) {
st = 1;
tot = 1;
}
#if (defined __FreeBSD__) && (__FreeBSD_version >= 300003)
/* This was changed from a `struct timeval' into a `u_int64_t'
* on FreeBSD 3.0 and renamed p_rtime -> p_runtime.
*/
totusec = (u_quad_t) p->p_runtime;
#else
sec = p->p_rtime.tv_sec;
usec = p->p_rtime.tv_usec;
totusec = (quad_t)sec * 1000000 + usec;
#endif
if (totusec < 0) {
/* XXX no %qd in kernel. Truncate. */
fprintf (stderr, "calcru: negative time: %ld usec\n",
(long)totusec);
totusec = 0;
}
u = totusec;
st = (u * st) / tot;
sp->tv_sec = st / 1000000;
sp->tv_usec = st % 1000000;
ut = (u * ut) / tot;
up->tv_sec = ut / 1000000;
up->tv_usec = ut % 1000000;
if (ip != NULL) {
it = (u * it) / tot;
ip->tv_sec = it / 1000000;
ip->tv_usec = it % 1000000;
}
}
/* Provides detailed information about a process. */
void
glibtop_get_proc_time_p (glibtop *server, glibtop_proc_time *buf,
pid_t pid)
{
struct kinfo_proc *pinfo;
struct user *u_addr = (struct user *)USRSTACK;
struct pstats pstats;
int count;
char filename [BUFSIZ];
struct stat statb;
glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_PROC_TIME), 0);
memset (buf, 0, sizeof (glibtop_proc_time));
if (server->sysdeps.proc_time == 0)
return;
/* It does not work for the swapper task. */
if (pid == 0) return;
sprintf (filename, "/proc/%d/mem", pid);
if (stat (filename, &statb)) return;
/* Get the process information */
pinfo = kvm_getprocs (server->machine.kd, KERN_PROC_PID, pid, &count);
if ((pinfo == NULL) || (count != 1))
glibtop_error_io_r (server, "kvm_getprocs (%d)", pid);
glibtop_suid_enter (server);
if ((pinfo [0].kp_proc.p_flag & P_INMEM) &&
kvm_uread (server->machine.kd, &(pinfo [0]).kp_proc,
(unsigned long) &u_addr->u_stats,
(char *) &pstats, sizeof (pstats)) == sizeof (pstats))
{
/* This is taken form the kernel source code of
* FreeBSD 2.2.6. */
/* Well, we just do the same getrusage () does ... */
register struct rusage *rup;
glibtop_suid_leave (server);
rup = &pstats.p_ru;
calcru(&(pinfo [0]).kp_proc,
&rup->ru_utime, &rup->ru_stime, NULL);
buf->utime = tv2sec (pstats.p_ru.ru_utime);
buf->stime = tv2sec (pstats.p_ru.ru_stime);
buf->cutime = tv2sec (pstats.p_cru.ru_utime);
buf->cstime = tv2sec (pstats.p_cru.ru_stime);
buf->start_time = tv2sec (pstats.p_start);
buf->flags = _glibtop_sysdeps_proc_time_user;
}
glibtop_suid_leave (server);
#if (defined __FreeBSD__) && (__FreeBSD_version >= 300003)
buf->rtime = pinfo [0].kp_proc.p_runtime;
#else
buf->rtime = tv2sec (pinfo [0].kp_proc.p_rtime);
#endif
buf->frequency = 1000000;
buf->flags |= _glibtop_sysdeps_proc_time;
}
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