xref: /titanic_52/usr/src/cmd/sgs/libconv/common/config.c (revision 9113a79cf228b8f7bd509b1328adf88659dfe218)
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 2006 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 #include	<stdlib.h>
29 #include	<sys/types.h>
30 #include	<string.h>
31 #include	"rtc.h"
32 #include	"_conv.h"
33 #include	"config_msg.h"
34 
35 #define	FEATSZ	CONV_EXPN_FIELD_DEF_PREFIX_SIZE + \
36 		MSG_CONF_EDLIBPATH_SIZE + CONV_EXPN_FIELD_DEF_SEP_SIZE + \
37 		MSG_CONF_ESLIBPATH_SIZE + CONV_EXPN_FIELD_DEF_SEP_SIZE + \
38 		MSG_CONF_ADLIBPATH_SIZE + CONV_EXPN_FIELD_DEF_SEP_SIZE + \
39 		MSG_CONF_ASLIBPATH_SIZE + CONV_EXPN_FIELD_DEF_SEP_SIZE + \
40 		MSG_CONF_DIRCFG_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
41 		MSG_CONF_OBJALT_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
42 		MSG_CONF_MEMRESV_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
43 		MSG_CONF_ENVS_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
44 		MSG_CONF_FLTR_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
45 		CONV_INV_STRSIZE + CONV_EXPN_FIELD_DEF_SUFFIX_SIZE
46 
47 /*
48  * String conversion routine for configuration file information.
49  */
50 const char *
51 conv_config_feat(int features)
52 {
53 	static	char	string[FEATSZ];
54 	static Val_desc	vda[] = {
55 		{ CONF_EDLIBPATH,	MSG_ORIG(MSG_CONF_EDLIBPATH) },
56 		{ CONF_ESLIBPATH,	MSG_ORIG(MSG_CONF_ESLIBPATH) },
57 		{ CONF_ADLIBPATH,	MSG_ORIG(MSG_CONF_ADLIBPATH) },
58 		{ CONF_ASLIBPATH,	MSG_ORIG(MSG_CONF_ASLIBPATH) },
59 		{ CONF_DIRCFG,		MSG_ORIG(MSG_CONF_DIRCFG) },
60 		{ CONF_OBJALT,		MSG_ORIG(MSG_CONF_OBJALT) },
61 		{ CONF_MEMRESV,		MSG_ORIG(MSG_CONF_MEMRESV) },
62 		{ CONF_ENVS,		MSG_ORIG(MSG_CONF_ENVS) },
63 		{ CONF_FLTR,		MSG_ORIG(MSG_CONF_FLTR) },
64 		{ 0,			0 }
65 	};
66 	static CONV_EXPN_FIELD_ARG conv_arg = { string, sizeof (string), vda };
67 
68 	conv_arg.oflags = conv_arg.rflags = features;
69 	(void) conv_expn_field(&conv_arg);
70 
71 	return ((const char *)string);
72 }
73 
74 #define	FLAGSZ	CONV_EXPN_FIELD_DEF_PREFIX_SIZE + \
75 		MSG_CONF_DIRENT_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
76 		MSG_CONF_ALLENTS_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
77 		MSG_CONF_NOEXIST_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
78 		MSG_CONF_EXEC_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
79 		MSG_CONF_ALTER_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
80 		MSG_CONF_OPTIONAL_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
81 		MSG_CONF_DUMP_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
82 		MSG_CONF_REALPATH_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
83 		MSG_CONF_NOALTER_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
84 		MSG_CONF_GROUP_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
85 		MSG_CONF_APP_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
86 		MSG_CONF_CMDLINE_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
87 		MSG_CONF_FILTER_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
88 		MSG_CONF_FILTEE_SIZE	+ CONV_EXPN_FIELD_DEF_SEP_SIZE + \
89 		CONV_INV_STRSIZE + CONV_EXPN_FIELD_DEF_SUFFIX_SIZE
90 
91 /*
92  * String conversion routine for object flags.
93  */
94 const char *
95 conv_config_obj(ushort_t flags)
96 {
97 	static char	string[FLAGSZ];
98 	static Val_desc vda[] = {
99 		{ RTC_OBJ_DIRENT,	MSG_ORIG(MSG_CONF_DIRENT) },
100 		{ RTC_OBJ_ALLENTS,	MSG_ORIG(MSG_CONF_ALLENTS) },
101 		{ RTC_OBJ_NOEXIST,	MSG_ORIG(MSG_CONF_NOEXIST) },
102 		{ RTC_OBJ_EXEC,		MSG_ORIG(MSG_CONF_EXEC) },
103 		{ RTC_OBJ_ALTER,	MSG_ORIG(MSG_CONF_ALTER) },
104 		{ RTC_OBJ_DUMP,		MSG_ORIG(MSG_CONF_DUMP) },
105 		{ RTC_OBJ_NOALTER,	MSG_ORIG(MSG_CONF_NOALTER) },
106 		{ RTC_OBJ_REALPTH,	MSG_ORIG(MSG_CONF_REALPATH) },
107 		{ RTC_OBJ_GROUP,	MSG_ORIG(MSG_CONF_GROUP) },
108 		{ RTC_OBJ_APP,		MSG_ORIG(MSG_CONF_APP) },
109 		{ RTC_OBJ_CMDLINE,	MSG_ORIG(MSG_CONF_CMDLINE) },
110 		{ RTC_OBJ_FILTER,	MSG_ORIG(MSG_CONF_FILTER) },
111 		{ RTC_OBJ_FILTEE,	MSG_ORIG(MSG_CONF_FILTEE) },
112 		{ 0,			0 }
113 	};
114 	static const char *leading_str_arr[2];
115 	static CONV_EXPN_FIELD_ARG conv_arg = { string, sizeof (string), vda,
116 		leading_str_arr };
117 
118 	const char **lstr = leading_str_arr;
119 
120 	if ((flags == 0) || (flags == RTC_OBJ_OPTINAL))
121 		return (MSG_ORIG(MSG_GBL_NULL));
122 
123 	conv_arg.rflags = flags;
124 
125 	/*
126 	 * Print an alternative-optional object simply as optional.
127 	 */
128 	if ((flags & (RTC_OBJ_ALTER | RTC_OBJ_OPTINAL)) ==
129 	    (RTC_OBJ_ALTER | RTC_OBJ_OPTINAL)) {
130 		*lstr++ = MSG_ORIG(MSG_CONF_OPTIONAL);
131 		conv_arg.rflags &= ~(RTC_OBJ_ALTER | RTC_OBJ_OPTINAL);
132 	}
133 	*lstr = NULL;
134 	conv_arg.oflags = conv_arg.rflags &= ~RTC_OBJ_OPTINAL;
135 
136 	(void) conv_expn_field(&conv_arg);
137 
138 	return ((const char *)string);
139 }
140 
141 /*
142  * Determine whether and old pathname exists within a search path string,
143  * without a new pathname, i.e., does the search path string contain "/usr/lib"
144  * but not "/lib".  If so, add the new pathname before the old pathname.  For
145  * example, convert:
146  *
147  *	/local/lib:/opt/sfw/lib:/usr/lib
148  * to:
149  *	/local/lib:/opt/sfw/lib:/lib:/usr/lib
150  */
151 const char *
152 conv_config_upm(const char *str, const char *old, const char *new,
153     size_t newlen)
154 {
155 	const char	*curstr, *ptr;
156 	const char	*curold = 0, *curnew = 0;
157 	const char	*ptrold = old, * ptrnew = new;
158 	int		chkold = 1, chknew = 1;
159 
160 	for (curstr = ptr = str; *ptr; ptr++) {
161 		if (*ptr == ':') {
162 			/*
163 			 * We've come to the end of a token within the string.
164 			 */
165 			if ((uintptr_t)ptr - (uintptr_t)curstr) {
166 				/*
167 				 * If the old or new string checking is still
168 				 * enabled, we've found a match.
169 				 */
170 				if (chkold)
171 					curold = curstr;
172 				if (chknew)
173 					curnew = curstr;
174 			}
175 			curstr = (char *)(ptr + 1);
176 
177 			/*
178 			 * If an old or new string hasn't yet been matched,
179 			 * re-enable the checking for either.
180 			 */
181 			if (curold == 0) {
182 				ptrold = old;
183 				chkold = 1;
184 			}
185 			if (curnew == 0) {
186 				ptrnew = new;
187 				chknew = 1;
188 			}
189 			continue;
190 		}
191 
192 		/*
193 		 * Determine if the current token matches the old or new string.
194 		 * If not, disable the checking for each string.
195 		 */
196 		if (chkold && (*ptr != *ptrold++))
197 			chkold = 0;
198 		if (chknew && (*ptr != *ptrnew++))
199 			chknew = 0;
200 	}
201 
202 	/*
203 	 * We've come to the end of the string, if the old or new string
204 	 * checking is still enabled, we've found a match.
205 	 */
206 	if ((uintptr_t)ptr - (uintptr_t)curstr) {
207 		if (chkold)
208 			curold = curstr;
209 		if (chknew)
210 			curnew = curstr;
211 	}
212 
213 	/*
214 	 * If an old string hasn't been found, or it has and a new string has
215 	 * been found, return the original string.
216 	 */
217 	if ((curold == 0) || curnew)
218 		return (str);
219 	else {
220 		char	*newstr;
221 		size_t	len;
222 
223 		/*
224 		 * Allocate a new string, enlarged to accommodate the new string
225 		 * that will be inserted, and an associated separator.
226 		 */
227 		if ((curstr = malloc(newlen + 2 +
228 		    (uintptr_t)ptr - (uintptr_t)str)) == 0)
229 			return (str);
230 
231 		newstr = (char *)curstr;
232 		for (len = (uintptr_t)curold - (uintptr_t)str; len; len--)
233 			*(newstr++) = *(str++);		/* copy up to */
234 							/*    insertion point */
235 		for (len = newlen; len; len--)
236 			*(newstr++) = *(new++);		/* add new string and */
237 		*(newstr++) = ':';			/*    separator */
238 		for (len = (uintptr_t)ptr - (uintptr_t)str; len; len--)
239 			*(newstr++) = *(str++);		/* add remaining */
240 		*(newstr++) = '\0';			/*	string */
241 
242 		return (curstr);
243 	}
244 }
245