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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 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 <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/procstate.h>
#include <sys/stat.h>
static const unsigned long _glibtop_sysdeps_proc_state =
(1 << GLIBTOP_PROC_STATE_CMD) + (1 << GLIBTOP_PROC_STATE_STATE);
static const unsigned long _glibtop_sysdeps_proc_state_uid =
(1 << GLIBTOP_PROC_STATE_UID) + (1 << GLIBTOP_PROC_STATE_GID);
/* Init function. */
void
glibtop_init_proc_state_s (glibtop *server)
{
server->sysdeps.proc_state = _glibtop_sysdeps_proc_state |
_glibtop_sysdeps_proc_state_uid;
}
/* Provides detailed information about a process. */
void
glibtop_get_proc_state_s (glibtop *server, glibtop_proc_state *buf, pid_t pid)
{
char buffer [BUFSIZ], *p;
struct stat statb;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_STATE, 0);
memset (buf, 0, sizeof (glibtop_proc_state));
/* IMPORTANT NOTICE: For security reasons it is extremely important
* that the 'uid' and 'gid' fields have correct
* values; NEVER set their flags values if this
* is not the case !!! */
sprintf (buffer, "/proc/%d/stat", pid);
if (stat (buffer, &statb))
return;
/* For security reasons we use stat () since it is
* more failsafe than parsing the file. */
buf->uid = statb.st_uid;
buf->gid = statb.st_gid;
buf->flags = _glibtop_sysdeps_proc_state_uid;
/* Now we read the remaining fields. */
if (proc_stat_to_buffer (buffer, pid))
return;
p = strrchr (buffer, ')'); *p = '\0';
buf->state = p [2];
p = skip_token (buffer); p++; /* pid */
if (*p++ != '(')
glibtop_error_r (server, "Bad data in /proc/%d/stat", pid);
strncpy (buf->cmd, p, sizeof (buf->cmd)-1);
buf->cmd [sizeof (buf->cmd)-1] = 0;
buf->flags |= _glibtop_sysdeps_proc_state;
}
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