1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
23  */
24 
25 /*
26  * svc-auditset - auditset transient service (AUDITSET_FMRI) startup method;
27  * sets non-/attributable mask in the kernel context.
28  */
29 
30 #include <audit_scf.h>
31 #include <bsm/adt.h>
32 #include <bsm/libbsm.h>
33 #include <errno.h>
34 #include <locale.h>
35 #include <stdio.h>
36 
37 #if !defined(SMF_EXIT_ERR_OTHER)
38 #define	SMF_EXIT_ERR_OTHER	1
39 #endif
40 
41 /*
42  * update_kcontext() - updates the non-/attributable preselection masks in
43  * the kernel context. Returns B_TRUE on success, B_FALSE otherwise.
44  */
45 boolean_t
46 update_kcontext(int cmd, char *cmask)
47 {
48 	au_mask_t	bmask;
49 
50 	(void) getauditflagsbin(cmask, &bmask);
51 	if (auditon(cmd, (caddr_t)&bmask, sizeof (bmask)) == -1) {
52 		(void) printf("Could not update kernel context (%s).\n",
53 		    cmd == A_SETAMASK ? "A_SETAMASK" : "A_SETKMASK");
54 		return (B_FALSE);
55 	}
56 
57 #ifdef	DEBUG
58 	(void) printf("svc-auditset: %s mask set to %s",
59 	    cmd == A_SETAMASK ? "Attributable" : "Non-Attributable", cmask);
60 #endif
61 
62 	return (B_TRUE);
63 }
64 
65 int
66 main(void)
67 {
68 	char		*auditset_fmri;
69 	char		*mask_cfg;
70 
71 	(void) setlocale(LC_ALL, "");
72 	(void) textdomain(TEXT_DOMAIN);
73 
74 	/* allow execution only inside the SMF facility */
75 	if ((auditset_fmri = getenv("SMF_FMRI")) == NULL ||
76 	    strcmp(auditset_fmri, AUDITSET_FMRI) != 0) {
77 		(void) printf(gettext("svc-auditset can be executed only "
78 		    "inside the SMF facility.\n"));
79 		return (SMF_EXIT_ERR_NOSMF);
80 	}
81 
82 	/* check the c2audit module state */
83 	if (adt_audit_state(AUC_DISABLED)) {
84 #ifdef	DEBUG
85 		if (errno == ENOTSUP) {
86 			(void) printf("c2audit module is excluded from "
87 			    "the system(4); kernel won't be updated.\n");
88 		} else {
89 			(void) printf("%s\n", strerror(errno));
90 		}
91 #endif
92 		return (SMF_EXIT_OK);
93 	}
94 
95 	/* update attributable mask */
96 	if (!do_getflags_scf(&mask_cfg) || mask_cfg == NULL) {
97 		(void) printf("Could not get configured attributable audit "
98 		    "flags.\n");
99 		return (SMF_EXIT_ERR_OTHER);
100 	}
101 	if (!update_kcontext(A_SETAMASK, mask_cfg)) {
102 		free(mask_cfg);
103 		return (SMF_EXIT_ERR_OTHER);
104 	}
105 	free(mask_cfg);
106 
107 	/* update non-attributable mask */
108 	if (!do_getnaflags_scf(&mask_cfg) || mask_cfg == NULL) {
109 		(void) printf("Could not get configured non-attributable "
110 		    "audit flags.\n");
111 		return (SMF_EXIT_ERR_OTHER);
112 	}
113 	if (!update_kcontext(A_SETKMASK, mask_cfg)) {
114 		free(mask_cfg);
115 		return (SMF_EXIT_ERR_OTHER);
116 	}
117 	free(mask_cfg);
118 
119 	return (SMF_EXIT_OK);
120 }
121