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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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <fcntl.h>
#include <unistd.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/open.h>
#include <glibtop/init_hooks.h>
#include "glibtop_suid.h"
/* !!! THIS FUNCTION RUNS SUID ROOT - CHANGE WITH CAUTION !!! */
void
glibtop_init_p (glibtop *server, const unsigned long features,
const unsigned flags)
{
const _glibtop_init_func_t *init_fkt;
if (server == NULL)
glibtop_error_r (NULL, "glibtop_init_p (server == NULL)");
if ((server->flags & _GLIBTOP_INIT_STATE_SYSDEPS) == 0) {
glibtop_open_p (server, "glibtop", features, flags);
for (init_fkt = _glibtop_init_hook_p; *init_fkt; init_fkt++)
(*init_fkt) (server);
server->flags |= _GLIBTOP_INIT_STATE_SYSDEPS;
}
}
/* Opens pipe to gtop server. Returns 0 on success and -1 on error. */
void
glibtop_open_p (glibtop *server, const char *program_name,
const unsigned long features, const unsigned flags)
{
/* !!! WE ARE ROOT HERE - CHANGE WITH CAUTION !!! */
server->machine.uid = getuid ();
server->machine.euid = geteuid ();
server->machine.gid = getgid ();
server->machine.egid = getegid ();
/* open kmem */
server->machine.kmem_fd = open("/dev/kmem", O_RDONLY);
if (server->machine.kmem_fd == -1)
glibtop_error_io_r (server, "Cannot open /dev/kmem");
/* Drop priviledges. */
if (seteuid (server->machine.uid))
_exit (1);
if (setegid (server->machine.gid))
_exit (1);
/* !!! END OF SUID ROOT PART !!! */
server->name = program_name;
}
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