diff options
author | se <se@FreeBSD.org> | 1995-03-16 15:10:11 +0000 |
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committer | se <se@FreeBSD.org> | 1995-03-16 15:10:11 +0000 |
commit | 965da3c27aad8b8260f2d9f4b1b580a4da6c1e04 (patch) | |
tree | 5959389185ad49f00b5a46d9a4f776c705afe0aa /usr.sbin/ncrcontrol/ncrcontrol.c | |
parent | d5b7bdded1fdd357d74ed85f296575c830678510 (diff) | |
download | FreeBSD-src-965da3c27aad8b8260f2d9f4b1b580a4da6c1e04.zip FreeBSD-src-965da3c27aad8b8260f2d9f4b1b580a4da6c1e04.tar.gz |
Reading NCR registers is not secure at all times, so prevent
an ordinary user from doing this. (Problem pointed out by
Guido van Rooij).
Diffstat (limited to 'usr.sbin/ncrcontrol/ncrcontrol.c')
-rw-r--r-- | usr.sbin/ncrcontrol/ncrcontrol.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/usr.sbin/ncrcontrol/ncrcontrol.c b/usr.sbin/ncrcontrol/ncrcontrol.c index 9aad16f..296fb88 100644 --- a/usr.sbin/ncrcontrol/ncrcontrol.c +++ b/usr.sbin/ncrcontrol/ncrcontrol.c @@ -1,6 +1,6 @@ /************************************************************************** ** -** $Id: ncrcontrol.c,v 1.5 1995/02/03 20:49:10 bde Exp $ +** $Id: ncrcontrol.c,v 1.6 1995/03/14 21:12:26 se Exp $ ** ** Utility for NCR 53C810 device driver. ** @@ -1310,7 +1310,7 @@ static void dump_ncr (void) dump_link (" jump_tcb", &ncr.jump_tcb); printf (" register: @ %x (p=%x)\n", ncr.vaddr, ncr.paddr); - if (strchr (debug_opt, 'r')) { + if (wizard && strchr (debug_opt, 'r')) { struct ncr_reg reg; if (!KVM_READ ( @@ -1374,7 +1374,7 @@ static void dump_ncr (void) printf (" lasttime: %s", ctime ((time_t*)&ncr.lasttime)); printf ("\n"); - if (strchr (debug_opt, 'd') && ncr.regtime.tv_sec) { + if (wizard && strchr (debug_opt, 'd') && ncr.regtime.tv_sec) { printf (" regdump: %s", ctime (&ncr.regtime.tv_sec)); dump_reg (&ncr.regdump); }; @@ -1444,6 +1444,11 @@ do_debug(char * arg) ); if (strchr (debug_opt, 'n')) dump_ncr (); + + if (!wizard) { + fprintf (stderr, "%s: You are NOT a wizard!\n", prog); + exit (2); + }; if (strchr (debug_opt, 'r')) { struct ncr_reg reg; if (!KVM_READ ( @@ -1554,7 +1559,8 @@ void main(argc, argv) break; case 'w': - wizard=1; + if(geteuid()==0) + wizard=1; break; case 'v': verbose++; |