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Drop privileges if we're not reading standard kernel file or namelist.

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Submitted by:	smpatel (Sujal Patel)
This commit is contained in:
Paul Traina 1996-05-30 02:18:44 +00:00
parent cd73303c45
commit 661a5e433a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=15990
1 changed files with 9 additions and 1 deletions
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10
usr.bin/ipcs/ipcs.c
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@ -24,7 +24,7 @@
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: ipcs.c,v 1.3 1994/09/19 10:24:38 davidg Exp $
* $Id: ipcs.c,v 1.4 1995/07/12 19:10:17 bde Exp $
*/
#include <stdio.h>
@ -185,6 +185,14 @@ main(argc, argv)
default:
usage();
}
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (namelist != NULL || core != NULL)
setgid(getgid());
if ((kd = kvm_open(namelist, core, NULL, O_RDONLY, "ipcs")) == NULL)
exit(1);