oxmc/libgtop
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fix numerous bigs in the FreeBSD backend

Browse Source 
* Correct calculation of CPU time.
* Fix a bug on newer versions of FreeBSD where computing the process map leads
to a tight error loop.
* Add support for the new procstat API to obtain the list of open files and
cwd.
* Use kvm_openfiles instead of kvm_open to better handle error messages.
* Split some modules out into non-suid modules.
* Properly determine the number of CPUs.

https://bugzilla.gnome.org/show_bug.cgi?id=605431
This commit is contained in:
Joe Marcus Clarke
2011-06-27 16:32:20 +02:00
committed by Jasper Lievisse Adriaanse
parent aa1a6766f2
commit 08fd95d253
10 changed files with 201 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

92
sysdeps/freebsd/suid_open.c Normal file
View File

@@ -0,0 +1,92 @@
/* Copyright (C) 1998 Joshua Sled
This file is part of LibGTop 1.0.
Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 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/error.h>
#include <glibtop/cpu.h>
#include <glibtop/open.h>
#include <glibtop/init_hooks.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)");
/* Do the initialization, but only if not already initialized. */
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;
}
}
void
glibtop_open_p (glibtop *server, const char *program_name,
const unsigned long features,
const unsigned flags)
{
char errbuf[_POSIX2_LINE_MAX];
#ifdef DEBUG
fprintf (stderr, "DEBUG (%d): glibtop_open_p ()\n", getpid ());
#endif
/* !!! WE ARE ROOT HERE - CHANGE WITH CAUTION !!! */
server->machine.uid = getuid ();
server->machine.euid = geteuid ();
server->machine.gid = getgid ();
server->machine.egid = getegid ();
/* Setup machine-specific data */
server->machine.kd = kvm_openfiles (NULL, NULL, NULL, O_RDONLY, errbuf);
if (server->machine.kd == NULL)
glibtop_error_io_r (server, "kvm_open");
/* Drop priviledges. */
if (setreuid (server->machine.euid, server->machine.uid))
_exit (1);
if (setregid (server->machine.egid, server->machine.gid))
_exit (1);
/* !!! END OF SUID ROOT PART !!! */
/* Our effective uid is now those of the user invoking the server,
* so we do no longer have any priviledges. */
/* NOTE: On FreeBSD, we do not need to be suid root, we just need to
* be sgid kmem.
*
* The server will only use setegid() to get back it's priviledges,
* so it will fail if it is suid root and not sgid kmem. */
}