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/* 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 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 General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop/proclist.h>
#include <glibtop_suid.h>
static const unsigned long _glibtop_sysdeps_proclist =
(1 << GLIBTOP_PROCLIST_TOTAL) + (1 << GLIBTOP_PROCLIST_NUMBER) +
(1 << GLIBTOP_PROCLIST_SIZE);
/* Fetch list of currently running processes.
*
* IMPORTANT NOTE:
* On error, this function MUST return NULL and set buf->flags to zero !
* On success, it returnes a pointer to a list of buf->number elements
* each buf->size big. The total size is stored in buf->total. */
unsigned *
glibtop_get_proclist_p (glibtop *server, glibtop_proclist *buf,
gint64 which, gint64 arg)
{
register struct proc *pp;
register int i, nproc = 0;
unsigned *proc_list = NULL;
size_t proc_size;
glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_PROCLIST), 0);
memset (buf, 0, sizeof (glibtop_proclist));
/* Read process table from kernel. */
_glibtop_read_proc_table (server);
/* Count number of processes. */
for (pp = server->machine.proc_table, i = 0;
i < server->machine.nproc; pp++, i++) {
if (pp->p_stat == 0)
continue;
else
nproc++;
}
if (nproc == 0) /* Should never happen. */
return NULL;
/* Allocate space for process list. */
proc_size = nproc * sizeof (unsigned);
proc_list = g_malloc (proc_size);
/* Write process list. */
for (pp = server->machine.proc_table, i = 0, nproc = 0;
i < server->machine.nproc; pp++, i++) {
if (pp->p_stat == 0)
continue;
proc_list [nproc++] = pp->p_pid;
}
/* Since everything is ok now, we can set buf->flags, fill in the remaining fields
and return proc_list. */
buf->flags = _glibtop_sysdeps_proclist;
buf->size = sizeof (unsigned);
buf->number = nproc;
buf->total = nproc * sizeof (unsigned);
return proc_list;
}
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