2 * Copyright (c) 1997, 1998
3 * Nan Yang Computer Services Limited. All rights reserved.
5 * This software is distributed under the so-called ``Berkeley
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the Company nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * This software is provided ``as is'', and any express or implied
21 * warranties, including, but not limited to, the implied warranties of
22 * merchantability and fitness for a particular purpose are disclaimed.
23 * In no event shall the company or contributors be liable for any
24 * direct, indirect, incidental, special, exemplary, or consequential
25 * damages (including, but not limited to, procurement of substitute
26 * goods or services; loss of use, data, or profits; or business
27 * interruption) however caused and on any theory of liability, whether
28 * in contract, strict liability, or tort (including negligence or
29 * otherwise) arising in any way out of the use of this software, even if
30 * advised of the possibility of such damage.
32 * $Id: vinumparser.c,v 1.21 2000/12/20 03:44:13 grog Exp grog $
33 * $FreeBSD: src/sys/dev/vinum/vinumparser.c,v 1.20.2.5 2001/05/28 05:56:27 grog Exp $
34 * $DragonFly: src/sbin/vinum/vinumparser.c,v 1.8 2007/01/20 19:20:39 dillon Exp $
38 * This file contains the parser for the configuration routines. It's used
39 * both in the kernel and in the user interface program, thus the separate file.
43 * Go through a text and split up into text tokens. These are either non-blank
44 * sequences, or any sequence (except \0) enclosed in ' or ". Embedded ' or
45 * " characters may be escaped by \, which otherwise has no special meaning.
47 * Delimit by following with a \0, and return pointers to the starts at token [].
48 * Return the number of tokens found as the return value.
50 * This method has the restriction that a closing " or ' must be followed by
53 * Error conditions are end of line before end of quote, or no space after
54 * a closing quote. In this case, tokenize() returns -1.
57 #include <sys/param.h>
58 #include <dev/raid/vinum/vinumkw.h>
63 #define iswhite isspace /* use the ctype macro */
65 /* enum keyword is defined in vinumvar.h */
67 #define keypair(x) { #x, kw_##x } /* create pair "foo", kw_foo */
68 #define flagkeypair(x) { "-"#x, kw_##x } /* create pair "-foo", kw_foo */
69 #define KEYWORDSET(x) {sizeof (x) / sizeof (struct _keywords), x}
71 /* Normal keywords. These are all the words that vinum knows. */
72 struct _keywords keywords[] =
84 keypair(writethrough),
109 keypair(printconfig),
128 keypair(resetconfig),
141 keypair(checkparity),
142 keypair(rebuildparity),
146 struct keywordset keyword_set = KEYWORDSET(keywords);
148 struct _keywords flag_keywords[] =
156 struct keywordset flag_set = KEYWORDSET(flag_keywords);
159 * Take a blank separated list of tokens and turn it into a list of
160 * individual nul-delimited strings. Build a list of pointers at
161 * token, which must have enough space for the tokens. Return the
162 * number of tokens, or -1 on error (typically a missing string
166 tokenize(char *cptr, char *token[])
168 char delim; /* delimiter for searching for the partner */
169 int tokennr; /* index of this token */
170 tokennr = 0; /* none found yet */
173 while (iswhite(*cptr))
174 cptr++; /* skip initial white space */
175 if ((*cptr == '\0') || (*cptr == '\n') || (*cptr == '#')) /* end of line */
176 return tokennr; /* return number of tokens found */
178 token[tokennr] = cptr; /* point to it */
179 tokennr++; /* one more */
180 /* XXX this is broken. It leaves superfluous \\ characters in the text */
181 if ((delim == '\'') || (delim == '"')) { /* delimitered */
184 if ((*cptr == delim) && (cptr[-1] != '\\')) { /* found the partner */
185 cptr++; /* move on past */
186 if (!iswhite(*cptr)) /* error, no space after closing quote */
188 *cptr++ = '\0'; /* delimit */
189 } else if ((*cptr == '\0') || (*cptr == '\n')) /* end of line */
192 } else { /* not quoted */
193 while ((*cptr != '\0') && (!iswhite(*cptr)) && (*cptr != '\n'))
195 if (*cptr != '\0') /* not end of the line, */
196 *cptr++ = '\0'; /* delimit and move to the next */
201 /* Find a keyword and return an index */
203 get_keyword(char *name, struct keywordset *keywordset)
206 struct _keywords *keywords = keywordset->k; /* point to the keywords */
207 if (name != NULL) { /* parameter exists */
208 for (i = 0; i < keywordset->size; i++)
209 if (!strcmp(name, keywords[i].name))
210 return (enum keyword) keywords[i].keyword;
212 return kw_invalid_keyword;