237 lines
7.4 KiB
C
237 lines
7.4 KiB
C
/*-
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* Copyright (c) 1997, 1998
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* Nan Yang Computer Services Limited. All rights reserved.
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*
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* This software is distributed under the so-called ``Berkeley
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* License'':
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Nan Yang Computer
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* Services Limited.
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* 4. Neither the name of the Company nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* This software is provided ``as is'', and any express or implied
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* warranties, including, but not limited to, the implied warranties of
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* merchantability and fitness for a particular purpose are disclaimed.
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* In no event shall the company or contributors be liable for any
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* direct, indirect, incidental, special, exemplary, or consequential
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* damages (including, but not limited to, procurement of substitute
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* goods or services; loss of use, data, or profits; or business
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* interruption) however caused and on any theory of liability, whether
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* in contract, strict liability, or tort (including negligence or
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* otherwise) arising in any way out of the use of this software, even if
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* advised of the possibility of such damage.
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*
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* $Id: vinumparser.c,v 1.25 2003/05/07 03:33:28 grog Exp grog $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* This file contains the parser for the configuration routines. It's used
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* both in the kernel and in the user interface program, thus the separate file.
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*/
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/*
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* Go through a text and split up into text tokens. These are either non-blank
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* sequences, or any sequence (except \0) enclosed in ' or ". Embedded ' or
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* " characters may be escaped by \, which otherwise has no special meaning.
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*
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* Delimit by following with a \0, and return pointers to the starts at token [].
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* Return the number of tokens found as the return value.
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*
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* This method has the restriction that a closing " or ' must be followed by
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* grey space.
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*
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* Error conditions are end of line before end of quote, or no space after
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* a closing quote. In this case, tokenize() returns -1.
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*/
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#include <sys/param.h>
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#include <dev/vinum/vinumkw.h>
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#ifdef _KERNEL
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <machine/setjmp.h>
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/* All this mess for a single struct definition */
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#include <sys/uio.h>
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#include <sys/namei.h>
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#include <sys/mount.h>
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#include <dev/vinum/vinumvar.h>
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#include <dev/vinum/vinumio.h>
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#include <dev/vinum/vinumext.h>
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#define iswhite(c) ((c == ' ') || (c == '\t')) /* check for white space */
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#else /* userland */
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#define iswhite isspace /* use the ctype macro */
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#endif
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/* enum keyword is defined in vinumvar.h */
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#define keypair(x) { #x, kw_##x } /* create pair "foo", kw_foo */
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#define flagkeypair(x) { "-"#x, kw_##x } /* create pair "-foo", kw_foo */
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#define KEYWORDSET(x) {sizeof (x) / sizeof (struct _keywords), x}
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/* Normal keywords. These are all the words that vinum knows. */
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struct _keywords keywords[] =
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{keypair(drive),
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keypair(partition),
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keypair(sd),
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keypair(subdisk),
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keypair(plex),
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keypair(volume),
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keypair(vol),
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keypair(setupstate),
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keypair(readpol),
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keypair(org),
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keypair(name),
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keypair(writethrough),
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keypair(writeback),
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keypair(device),
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keypair(concat),
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keypair(raid4),
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keypair(raid5),
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keypair(striped),
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keypair(plexoffset),
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keypair(driveoffset),
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keypair(length),
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keypair(len),
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keypair(size),
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keypair(state),
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keypair(round),
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keypair(prefer),
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keypair(preferred),
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keypair(rename),
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keypair(detached),
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#ifndef _KERNEL /* for vinum(8) only */
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keypair(debug),
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keypair(stripe),
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keypair(mirror),
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#endif
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keypair(attach),
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keypair(detach),
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keypair(printconfig),
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keypair(saveconfig),
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keypair(replace),
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keypair(create),
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keypair(read),
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keypair(modify),
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keypair(list),
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keypair(l),
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keypair(ld),
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keypair(ls),
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keypair(lp),
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keypair(lv),
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keypair(info),
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keypair(set),
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keypair(rm),
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keypair(mv),
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keypair(move),
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keypair(init),
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keypair(resetconfig),
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keypair(start),
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keypair(stop),
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keypair(makedev),
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keypair(help),
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keypair(quit),
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keypair(setdaemon),
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keypair(getdaemon),
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keypair(max),
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keypair(replace),
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keypair(readpol),
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keypair(resetstats),
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keypair(setstate),
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keypair(checkparity),
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keypair(rebuildparity),
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keypair(dumpconfig),
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keypair(retryerrors)
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};
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struct keywordset keyword_set = KEYWORDSET(keywords);
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#ifndef _KERNEL
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struct _keywords flag_keywords[] =
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{flagkeypair(f),
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flagkeypair(d),
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flagkeypair(v),
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flagkeypair(s),
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flagkeypair(r),
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flagkeypair(w)
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};
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struct keywordset flag_set = KEYWORDSET(flag_keywords);
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#endif
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/*
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* Take a blank separated list of tokens and turn it into a list of
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* individual nul-delimited strings. Build a list of pointers at
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* token, which must have enough space for the tokens. Return the
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* number of tokens, or -1 on error (typically a missing string
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* delimiter).
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*/
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int
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tokenize(char *cptr, char *token[], int maxtoken)
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{
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char delim; /* delimiter for searching for the partner */
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int tokennr; /* index of this token */
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for (tokennr = 0; tokennr < maxtoken;) {
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while (iswhite(*cptr))
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cptr++; /* skip initial white space */
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if ((*cptr == '\0') || (*cptr == '\n') || (*cptr == '#')) /* end of line */
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return tokennr; /* return number of tokens found */
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delim = *cptr;
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token[tokennr] = cptr; /* point to it */
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tokennr++; /* one more */
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if (tokennr == maxtoken) /* run off the end? */
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return tokennr;
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if ((delim == '\'') || (delim == '"')) { /* delimitered */
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for (;;) {
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cptr++;
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if ((*cptr == delim) && (cptr[-1] != '\\')) { /* found the partner */
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cptr++; /* move on past */
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if (!iswhite(*cptr)) /* error, no space after closing quote */
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return -1;
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*cptr++ = '\0'; /* delimit */
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} else if ((*cptr == '\0') || (*cptr == '\n')) /* end of line */
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return -1;
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}
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} else { /* not quoted */
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while ((*cptr != '\0') && (!iswhite(*cptr)) && (*cptr != '\n'))
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cptr++;
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if (*cptr != '\0') /* not end of the line, */
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*cptr++ = '\0'; /* delimit and move to the next */
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}
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}
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return maxtoken; /* can't get here */
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}
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/* Find a keyword and return an index */
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enum keyword
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get_keyword(char *name, struct keywordset *keywordset)
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{
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int i;
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struct _keywords *keywords = keywordset->k; /* point to the keywords */
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if (name != NULL) { /* parameter exists */
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for (i = 0; i < keywordset->size; i++)
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if (!strcmp(name, keywords[i].name))
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return (enum keyword) keywords[i].keyword;
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}
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return kw_invalid_keyword;
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}
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