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/*
23 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27
28/*
29 *	lslabels - Display all labels dominating the specified label.
30 */
31
32#include <errno.h>
33#include <libintl.h>
34#include <locale.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39#include <stropts.h>
40
41#include <sys/param.h>
42
43#include <tsol/label.h>
44#include <sys/tsol/label_macro.h>
45#include <iso/limits_iso.h>
46
47#if !defined(TEXT_DOMAIN)
48#define	TEXT_DOMAIN	 "SYS_TEST"
49#endif	/* !defined(TEXT_DOMAIN) */
50
51int hflg = 0;			/* true if hex output */
52
53/*
54 * Compartment mask macros.
55 */
56
57typedef uint32_t comp_chunk_t;
58
59#define	__NBWRD		(CHAR_BIT * sizeof (comp_chunk_t))
60#define	COMP_BITS	(CHAR_BIT * sizeof (Compartments_t))
61#define	compmask(n)	(1 << ((__NBWRD - 1) - ((n) % __NBWRD)))
62#define	compword(n)	((n)/__NBWRD)
63
64#define	COMP_ADDSET(a, p)	((comp_chunk_t *)(a))[compword(p)] |= \
65				    compmask(p)
66#define	COMP_DELSET(a, p)	((comp_chunk_t *)(a))[compword(p)] &= \
67				    ~compmask(p)
68#define	COMP_ISMEMBER(a, p)	((((comp_chunk_t *)(a))[compword(p)] & \
69				    compmask(p)) != 0)
70
71/* Need functions to test if bit is on */
72
73
74void
75bitfinder(m_label_t label, int next_bit) {
76	char *labelstr = NULL;
77
78	Compartments_t *comps = &label.compartments;
79
80	while (next_bit < COMP_BITS) {
81		if (COMP_ISMEMBER(comps, next_bit)) {
82			bitfinder(label, next_bit + 1);
83			COMP_DELSET(comps, next_bit);
84
85			if (label_to_str(&label, &labelstr, M_LABEL,
86			    LONG_NAMES) == 0) {
87				m_label_t *label2 = NULL;
88				int err;
89
90				if (str_to_label(labelstr, &label2, MAC_LABEL,
91				    L_NO_CORRECTION, &err) == 0) {
92					if (!hflg) {
93						(void) printf("%s\n", labelstr);
94					} else {
95						free(labelstr);
96						(void) label_to_str(&label,
97						    &labelstr, M_INTERNAL, 0);
98						(void) printf("%s\n", labelstr);
99					}
100					m_label_free(label2);
101				}
102				free(labelstr);
103			}
104			bitfinder(label, next_bit + 1);
105			break;
106		}
107		next_bit++;
108		}
109}
110
111static void
112label_error(const char *ascii, const int err)
113{
114	if (errno == EINVAL) {
115		switch (err) {
116		case M_BAD_STRING:
117			(void) fprintf(stderr,
118			    gettext("lslabels: bad string %s\n"), ascii);
119		break;
120		case M_BAD_LABEL:
121			(void) fprintf(stderr,
122			    gettext("lslabels: bad previous label\n"));
123		break;
124		default:
125			(void) fprintf(stderr,
126			    gettext("lslabels: parsing error found in "
127			    "\"%s\" at position %d\n"), ascii, err);
128		break;
129		}
130	} else {
131		perror("lslabels");
132	}
133	exit(1);
134	/*NOTREACHED*/
135}
136
137int
138main(int argc, char **argv)
139{
140	int errflg = 0;			/* true if arg error */
141	m_label_t *label = NULL;	/* binary labels */
142	char ascii[PIPE_BUF];		/* human readable label */
143	char *labelstr = NULL;		/* external label to start from */
144	int err = 0;			/* label error */
145	int c;
146	int mode = M_LABEL;
147	_Classification *level;
148
149	(void) setlocale(LC_ALL, "");
150	(void) textdomain(TEXT_DOMAIN);
151
152	opterr = 0;
153	while ((c = getopt(argc, argv, "h")) != EOF) {
154
155		switch (c) {
156		case 'h':
157			hflg++;
158			mode = M_INTERNAL;
159			break;
160
161		default:
162			errflg++;
163			break;
164		}
165	}
166
167	argc -= optind - 1;
168	if (errflg || argc > 2) {
169
170		(void) fprintf(stderr,
171		    gettext("usage: %s [-h] [label]\n"),
172		    argv[0]);
173		exit(1);
174		/*NOTREACHED*/
175	}
176
177	if (argc == 2) {
178		/* use label on command line */
179
180		(void) strlcpy(ascii, argv[optind], sizeof (ascii));
181	} else {
182		/* read label from standard input */
183		if ((c = read(STDIN_FILENO, ascii, sizeof (ascii))) <= 0) {
184			perror(gettext("reading ASCII coded label"));
185			exit(1);
186			/*NOTREACHED*/
187		}
188
189		/*
190		 * replace '\n' or (end of buffer) with end of string.
191		 */
192		ascii[c-1] = '\0';
193
194		/*
195		 * flush any remaining input past the size of the buffer.
196		 */
197		(void) ioctl(STDIN_FILENO, I_FLUSH, FLUSHR);
198	}
199
200	if (str_to_label(ascii, &label, MAC_LABEL, L_NO_CORRECTION,
201	    &err) == -1) {
202		label_error(ascii, err);
203	}
204	if (label_to_str(label, &labelstr, mode,
205	    DEF_NAMES) == 0) {
206		(void) printf("%s\n", labelstr);
207	}
208
209	level =  &label->classification.class_u.class_chunk;
210	while (*level > 0) {
211		bitfinder(*label, 0);
212		*level -= 1;
213	}
214	m_label_free(label);
215
216	return (0);		/* really exit(0); */
217}
218