xref: /illumos-gate/usr/src/cmd/lp/lib/access/change.c (revision 7c478bd9)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 1993 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 
31 #pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.8	*/
32 /* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */
33 
34 #include "errno.h"
35 #include "string.h"
36 #include "stdlib.h"
37 
38 #include "lp.h"
39 #include "access.h"
40 
41 static int		chgaccess ( int , char ** , char * , char * , char * );
42 static char **		empty_list ( void );
43 
44 /**
45  ** deny_user_form() - DENY USER ACCESS TO FORM
46  **/
47 
48 int
deny_user_form(char ** user_list,char * form)49 deny_user_form(char **user_list, char *form)
50 {
51 	return (chgaccess(0, user_list, form, Lp_A_Forms, ""));
52 }
53 
54 /**
55  ** allow_user_form() - ALLOW USER ACCESS TO FORM
56  **/
57 
58 int
allow_user_form(char ** user_list,char * form)59 allow_user_form(char **user_list, char *form)
60 {
61 	return (chgaccess(1, user_list, form, Lp_A_Forms, ""));
62 }
63 
64 /**
65  ** deny_user_printer() - DENY USER ACCESS TO PRINTER
66  **/
67 
68 int
deny_user_printer(char ** user_list,char * printer)69 deny_user_printer(char **user_list, char *printer)
70 {
71 	return (chgaccess(0, user_list, printer, Lp_A_Printers, UACCESSPREFIX));
72 }
73 
74 /**
75  ** allow_user_printer() - ALLOW USER ACCESS TO PRINTER
76  **/
77 
78 int
allow_user_printer(char ** user_list,char * printer)79 allow_user_printer(char **user_list, char *printer)
80 {
81 	return (chgaccess(1, user_list, printer, Lp_A_Printers, UACCESSPREFIX));
82 }
83 
84 /**
85  ** deny_form_printer() - DENY FORM USE ON PRINTER
86  **/
87 
88 int
deny_form_printer(char ** form_list,char * printer)89 deny_form_printer(char **form_list, char *printer)
90 {
91 	return (chgaccess(0, form_list, printer, Lp_A_Printers, FACCESSPREFIX));
92 }
93 
94 /**
95  ** allow_form_printer() - ALLOW FORM USE ON PRINTER
96  **/
97 
98 int
allow_form_printer(char ** form_list,char * printer)99 allow_form_printer(char **form_list, char *printer)
100 {
101 	return (chgaccess(1, form_list, printer, Lp_A_Printers, FACCESSPREFIX));
102 }
103 
104 /**
105  ** remove_paper_from_printer() - DENY FORM USE ON PRINTER
106  **/
107 
108 int
remove_paper_from_printer(char ** form_list,char * printer)109 remove_paper_from_printer(char **form_list, char *printer)
110 {
111 	return (chgaccess(0, form_list, printer, Lp_A_Printers, PACCESSPREFIX));
112 }
113 
114 /**
115  ** add_paper_to_printer() - ALLOW FORM USE ON PRINTER
116  **/
117 
118 int
add_paper_to_printer(char ** form_list,char * printer)119 add_paper_to_printer(char **form_list, char *printer)
120 {
121 	return (chgaccess(1, form_list, printer, Lp_A_Printers, PACCESSPREFIX));
122 }
123 
124 /**
125  ** chgaccess() - UPDATE ALLOW/DENY ACCESS OF ITEM TO RESOURCE
126  **/
127 
128 static int
chgaccess(int isallow,char ** list,char * name,char * dir,char * prefix)129 chgaccess(int isallow, char **list, char *name, char *dir, char *prefix)
130 {
131 	register char		***padd_list,
132 				***prem_list,
133 				**pl;
134 
135 	char			**allow_list,
136 				**deny_list;
137 
138 	if (loadaccess(dir, name, prefix, &allow_list, &deny_list) == -1)
139 		return (-1);
140 
141 	if (isallow) {
142 		padd_list = &allow_list;
143 		prem_list = &deny_list;
144 	} else {
145 		padd_list = &deny_list;
146 		prem_list = &allow_list;
147 	}
148 
149 	for (pl = list; *pl; pl++) {
150 
151 		/*
152 		 * Do the ``all'' and ``none'' cases explicitly,
153 		 * so that we can clean up the lists nicely.
154 		 */
155 		if (STREQU(*pl, NAME_NONE)) {
156 			isallow = !isallow;
157 			goto AllCase;
158 		}
159 		if (
160 			STREQU(*pl, NAME_ALL)
161 		     || STREQU(*pl, NAME_ANY)
162 		     || STREQU(*pl, ALL_BANG_ALL)
163 		) {
164 AllCase:
165 			freelist (allow_list);
166 			freelist (deny_list);
167 			if (isallow) {
168 				allow_list = 0;
169 				deny_list = empty_list();
170 			} else {
171 				allow_list = 0;
172 				deny_list = 0;
173 			}
174 			break;
175 
176 		} else {
177 
178 			/*
179 			 * For each regular item in the list,
180 			 * we add it to the ``add list'' and remove it
181 			 * from the ``remove list''. This is not
182 			 * efficient, especially if there are a lot of
183 			 * items in the caller's list; doing it the
184 			 * way we do, however, has the side effect
185 			 * of skipping duplicate names in the caller's
186 			 * list.
187 			 *
188 			 * Do a regular "addlist()"--the resulting
189 			 * list may have redundancies, but it will
190 			 * still be correct.
191 			 */
192 			if (addlist(padd_list, *pl) == -1)
193 				return (-1);
194 			if (bang_dellist(prem_list, *pl) == -1)
195 				return (-1);
196 
197 		}
198 
199 	}
200 
201 	return (dumpaccess(dir, name, prefix, &allow_list, &deny_list));
202 }
203 
204 /**
205  ** empty_list() - CREATE AN EMPTY LIST
206  **/
207 
208 static char **
empty_list(void)209 empty_list(void)
210 {
211 	register char		**empty;
212 
213 
214 	if (!(empty = (char **)Malloc(sizeof(char *)))) {
215 		errno = ENOMEM;
216 		return (0);
217 	}
218 	*empty = 0;
219 	return (empty);
220 }
221