d72da1bb2f
1998-08-07 Martin Baulig <martin@home-of-linux.org> * sysdeps/stub_suid: New directory. This is mainly used as example for people porting libgtop to other systems.
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* $Id$ */
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/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the Gnome Top Library.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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The Gnome Top Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome Top Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <glibtop.h>
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#include <glibtop/open.h>
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#include <glibtop/xmalloc.h>
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/* !!! THIS FUNCTION RUNS SUID ROOT - CHANGE WITH CAUTION !!! */
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void
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glibtop_init_p (glibtop *server, const unsigned long features,
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const unsigned flags)
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{
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glibtop_init_func_t *init_fkt;
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if (server == NULL)
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glibtop_error_r (NULL, "glibtop_init_p (server == NULL)");
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/* Do the initialization, but only if not already initialized. */
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if ((server->flags & _GLIBTOP_INIT_STATE_INIT) == 0) {
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glibtop_open_p (server, "glibtop", features, flags);
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for (init_fkt = _glibtop_init_hook_p; *init_fkt; init_fkt++)
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(*init_fkt) (server);
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server->flags |= _GLIBTOP_INIT_STATE_INIT;
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}
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}
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void
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glibtop_open_p (glibtop *server, const char *program_name,
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const unsigned long features, const unsigned flags)
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{
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/* !!! WE ARE ROOT HERE - CHANGE WITH CAUTION !!! */
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server->name = program_name;
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server->machine.uid = getuid ();
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server->machine.euid = geteuid ();
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server->machine.gid = getgid ();
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server->machine.egid = getegid ();
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/* Drop priviledges. */
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if (setreuid (server->machine.euid, server->machine.uid))
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_exit (1);
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if (setregid (server->machine.egid, server->machine.gid))
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_exit (1);
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/* !!! END OF SUID ROOT PART !!! */
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/* Our effective uid is now those of the user invoking the server,
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* so we do no longer have any priviledges. */
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}
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