Aren/NetBSD
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revoke priviledges when no longer needed.

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This commit is contained in:
mrg 1998-07-06 11:58:51 +00:00
parent 1f7e36a738
commit 7505f7caf3
1 changed files with 9 additions and 2 deletions
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11
usr.bin/modstat/modstat.c
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@ -1,4 +1,4 @@
/* $NetBSD: modstat.c,v 1.10 1997/10/19 05:17:30 lukem Exp $ */ /* $NetBSD: modstat.c,v 1.11 1998/07/06 11:58:51 mrg Exp $ */
/* /*
* Copyright (c) 1993 Terrence R. Lambert. * Copyright (c) 1993 Terrence R. Lambert.
@ -34,7 +34,7 @@
#include <sys/cdefs.h> #include <sys/cdefs.h>
#ifndef lint #ifndef lint
__RCSID("$NetBSD: modstat.c,v 1.10 1997/10/19 05:17:30 lukem Exp $"); __RCSID("$NetBSD: modstat.c,v 1.11 1998/07/06 11:58:51 mrg Exp $");
#endif #endif
#include <sys/param.h> #include <sys/param.h>
@ -51,6 +51,7 @@ __RCSID("$NetBSD: modstat.c,v 1.10 1997/10/19 05:17:30 lukem Exp $");
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#include "pathnames.h" #include "pathnames.h"
void cleanup __P((void)); void cleanup __P((void));
@ -139,7 +140,9 @@ main(argc, argv)
int c; int c;
int modnum = -1; int modnum = -1;
char *modname = NULL; char *modname = NULL;
gid_t egid = getegid();
setegid(getgid());
while ((c = getopt(argc, argv, "i:n:")) != -1) { while ((c = getopt(argc, argv, "i:n:")) != -1) {
switch (c) { switch (c) {
case 'i': case 'i':
@ -165,9 +168,13 @@ main(argc, argv)
* Open the virtual device device driver for exclusive use (needed * Open the virtual device device driver for exclusive use (needed
* to ioctl() to retrive the loaded module(s) status). * to ioctl() to retrive the loaded module(s) status).
*/ */
(void)setegid(egid);
if ((devfd = open(_PATH_LKM, O_RDONLY, 0)) == -1) if ((devfd = open(_PATH_LKM, O_RDONLY, 0)) == -1)
err(2, _PATH_LKM); err(2, _PATH_LKM);
/* get rid of our priviledges now */
setgid(getgid());
atexit(cleanup); atexit(cleanup);
printf("Type Id Off Loadaddr Size Info Rev Module Name\n"); printf("Type Id Off Loadaddr Size Info Rev Module Name\n");