getexec.c revision 2830:5228d1267a01 
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 2006 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#pragma ident	"%Z%%M%	%I%	%E% SMI"
27
28/*
29 * Routines to handle getexec* calls in nscd
30 */
31
32#include <string.h>
33#include <exec_attr.h>
34#include "cache.h"
35
36static int execattr_compar(const void *, const void *);
37static uint_t execattr_gethash(nss_XbyY_key_t *, int);
38static void execattr_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
39
40#define	nam_db		ctx->nsc_db[0]
41#define	id_db		ctx->nsc_db[1]
42#define	nam_id_db	ctx->nsc_db[2]
43#define	NSC_NAME_EXECATTR_BYNAME	"execattr_byname"
44#define	NSC_NAME_EXECATTR_BYID		"execattr_byid"
45#define	NSC_NAME_EXECATTR_BYNAMEID	"execattr_bynameid"
46
47void
48exec_init_ctx(nsc_ctx_t *ctx) {
49	ctx->dbname = NSS_DBNAM_EXECATTR;
50	ctx->file_name = "/etc/security/exec_attr";
51	ctx->db_count = 3;
52	nam_db = make_cache(nsc_key_other,
53			NSS_DBOP_EXECATTR_BYNAME,
54			NSC_NAME_EXECATTR_BYNAME,
55			execattr_compar,
56			execattr_getlogstr,
57			execattr_gethash, nsc_ht_default, -1);
58	id_db = make_cache(nsc_key_other,
59			NSS_DBOP_EXECATTR_BYID,
60			NSC_NAME_EXECATTR_BYID,
61			execattr_compar,
62			execattr_getlogstr,
63			execattr_gethash, nsc_ht_default, -1);
64	nam_id_db = make_cache(nsc_key_other,
65			NSS_DBOP_EXECATTR_BYNAMEID,
66			NSC_NAME_EXECATTR_BYNAMEID,
67			execattr_compar,
68			execattr_getlogstr,
69			execattr_gethash, nsc_ht_default, -1);
70}
71
72#define	EXEC_STR_CMP(s1, s2) \
73	if ((a = s1) == NULL) \
74		a = z; \
75	if ((b = s2) == NULL) \
76		b = z; \
77	res = strcmp(a, b); \
78	if (res != 0) \
79		return (res > 0 ? 1 : -1);
80
81static int
82execattr_compar(const void *n1, const void *n2) {
83	nsc_entry_t	*e1 = (nsc_entry_t *)n1;
84	nsc_entry_t	*e2 = (nsc_entry_t *)n2;
85	_priv_execattr	*ep1 = (_priv_execattr *)e1->key.attrp;
86	_priv_execattr	*ep2 = (_priv_execattr *)e2->key.attrp;
87	int		res;
88	const char	*a, *b, *z = "";
89
90	/* compare name */
91	EXEC_STR_CMP(ep1->name, ep2->name);
92
93	/* compare policy */
94	EXEC_STR_CMP(ep1->policy, ep2->policy);
95
96	/* compare type */
97	EXEC_STR_CMP(ep1->type, ep2->type);
98
99	/* compare id */
100	EXEC_STR_CMP(ep1->id, ep2->id);
101
102	/* compare search flag */
103	return (_NSC_INT_KEY_CMP(ep1->search_flag, ep2->search_flag));
104}
105
106static uint_t
107execattr_gethash(nss_XbyY_key_t *key, int htsize) {
108	_priv_execattr	*ep = key->attrp;
109	char		keys[1024];
110	int		len;
111
112	len = snprintf(keys, sizeof (keys), "%s:%s:%s:%s:%d",
113		ep->name ? ep->name : "", ep->type ? ep->type : "",
114		ep->id ? ep->id : "", ep->policy ? ep->policy : "",
115		ep->search_flag);
116	return (db_gethash(keys, len, htsize));
117}
118
119static void
120execattr_getlogstr(char *name, char *whoami, size_t len,
121	nss_XbyY_args_t *argp) {
122	_priv_execattr	*ep = argp->key.attrp;
123
124	(void) snprintf(whoami, len,
125		"%s [name=%s:type=%s:id=%s:policy=%s:flags=%d]",
126		name, check_null(ep->name), check_null(ep->type),
127		check_null(ep->id), check_null(ep->policy),
128		ep->search_flag);
129}
130