xref: /opensolaris-onvv-gate/usr/src/cmd/sgs/libconv/common/config.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include	<stdlib.h>
#include	<sys/types.h>
#include	<string.h>
#include	"rtc.h"
#include	"_conv.h"
#include	"config_msg.h"

#define	FEATSZ	MSG_GBL_OSQBRKT_SIZE + \
		MSG_CONF_EDLIBPATH_SIZE + \
		MSG_CONF_ESLIBPATH_SIZE + \
		MSG_CONF_ADLIBPATH_SIZE + \
		MSG_CONF_ASLIBPATH_SIZE + \
		MSG_CONF_DIRCFG_SIZE + \
		MSG_CONF_OBJALT_SIZE + \
		MSG_CONF_MEMRESV_SIZE + \
		MSG_CONF_ENVS_SIZE + \
		MSG_CONF_FLTR_SIZE + \
		CONV_INV_STRSIZE + MSG_GBL_CSQBRKT_SIZE

/*
 * String conversion routine for configuration file information.
 */
const char *
conv_config_feat(int features)
{
	static	char	string[FEATSZ];
	static Val_desc	vda[] = {
		{ CONF_EDLIBPATH,	MSG_ORIG(MSG_CONF_EDLIBPATH) },
		{ CONF_ESLIBPATH,	MSG_ORIG(MSG_CONF_ESLIBPATH) },
		{ CONF_ADLIBPATH,	MSG_ORIG(MSG_CONF_ADLIBPATH) },
		{ CONF_ASLIBPATH,	MSG_ORIG(MSG_CONF_ASLIBPATH) },
		{ CONF_DIRCFG,		MSG_ORIG(MSG_CONF_DIRCFG) },
		{ CONF_OBJALT,		MSG_ORIG(MSG_CONF_OBJALT) },
		{ CONF_MEMRESV,		MSG_ORIG(MSG_CONF_MEMRESV) },
		{ CONF_ENVS,		MSG_ORIG(MSG_CONF_ENVS) },
		{ CONF_FLTR,		MSG_ORIG(MSG_CONF_FLTR) },
		{ 0,			0 }
	};

	(void) strlcpy(string, MSG_ORIG(MSG_GBL_OSQBRKT), FEATSZ);
	if (conv_expn_field(string, FEATSZ, vda, features,
	    features, 0, 0))
		(void) strlcat(string, MSG_ORIG(MSG_GBL_CSQBRKT), FEATSZ);

	return ((const char *)string);
}

#define	FLAGSZ	MSG_GBL_OSQBRKT_SIZE + \
		MSG_CONF_DIRENT_SIZE + \
		MSG_CONF_ALLENTS_SIZE + \
		MSG_CONF_NOEXIST_SIZE + \
		MSG_CONF_EXEC_SIZE + \
		MSG_CONF_ALTER_SIZE + \
		MSG_CONF_OPTIONAL_SIZE + \
		MSG_CONF_DUMP_SIZE + \
		MSG_CONF_REALPATH_SIZE + \
		MSG_CONF_NOALTER_SIZE + \
		MSG_CONF_GROUP_SIZE + \
		MSG_CONF_APP_SIZE + \
		MSG_CONF_CMDLINE_SIZE + \
		MSG_CONF_FILTER_SIZE + \
		MSG_CONF_FILTEE_SIZE + \
		CONV_INV_STRSIZE + MSG_GBL_CSQBRKT_SIZE

/*
 * String conversion routine for object flags.
 */
const char *
conv_config_obj(ushort_t flags)
{
	static char	string[FLAGSZ];
	static Val_desc vda[] = {
		{ RTC_OBJ_DIRENT,	MSG_ORIG(MSG_CONF_DIRENT) },
		{ RTC_OBJ_ALLENTS,	MSG_ORIG(MSG_CONF_ALLENTS) },
		{ RTC_OBJ_NOEXIST,	MSG_ORIG(MSG_CONF_NOEXIST) },
		{ RTC_OBJ_EXEC,		MSG_ORIG(MSG_CONF_EXEC) },
		{ RTC_OBJ_ALTER,	MSG_ORIG(MSG_CONF_ALTER) },
		{ RTC_OBJ_DUMP,		MSG_ORIG(MSG_CONF_DUMP) },
		{ RTC_OBJ_NOALTER,	MSG_ORIG(MSG_CONF_NOALTER) },
		{ RTC_OBJ_REALPTH,	MSG_ORIG(MSG_CONF_REALPATH) },
		{ RTC_OBJ_GROUP,	MSG_ORIG(MSG_CONF_GROUP) },
		{ RTC_OBJ_APP,		MSG_ORIG(MSG_CONF_APP) },
		{ RTC_OBJ_CMDLINE,	MSG_ORIG(MSG_CONF_CMDLINE) },
		{ RTC_OBJ_FILTER,	MSG_ORIG(MSG_CONF_FILTER) },
		{ RTC_OBJ_FILTEE,	MSG_ORIG(MSG_CONF_FILTEE) },
		{ 0,			0 }
	};
	ushort_t	_flags = flags;

	if ((flags == 0) || (flags == RTC_OBJ_OPTINAL))
		return (MSG_ORIG(MSG_GBL_NULL));

	(void) strlcpy(string, MSG_ORIG(MSG_GBL_OSQBRKT), FLAGSZ);

	/*
	 * Print an alternative-optional object simply as optional.
	 */
	if ((flags & (RTC_OBJ_ALTER | RTC_OBJ_OPTINAL)) ==
	    (RTC_OBJ_ALTER | RTC_OBJ_OPTINAL)) {
		if (strlcat(string, MSG_ORIG(MSG_CONF_OPTIONAL),
		    FLAGSZ) >= FLAGSZ)
			return (conv_invalid_val(string, FLAGSZ, flags, 0));
		flags = _flags &= ~(RTC_OBJ_ALTER | RTC_OBJ_OPTINAL);
	}
	flags = _flags &= ~RTC_OBJ_OPTINAL;

	if (conv_expn_field(string, FLAGSZ, vda, flags, _flags, 0, 0))
		(void) strlcat(string, MSG_ORIG(MSG_GBL_CSQBRKT), FLAGSZ);

	return ((const char *)string);
}

/*
 * Determine whether and old pathname exists within a search path string,
 * without a new pathname, i.e., does the search path string contain "/usr/lib"
 * but not "/lib".  If so, add the new pathname before the old pathname.  For
 * example, convert:
 *
 *	/local/lib:/opt/sfw/lib:/usr/lib
 * to:
 *	/local/lib:/opt/sfw/lib:/lib:/usr/lib
 */
const char *
conv_config_upm(const char *str, const char *old, const char *new,
    size_t newlen)
{
	const char	*curstr, *ptr;
	const char	*curold = 0, *curnew = 0;
	const char	*ptrold = old, * ptrnew = new;
	int		chkold = 1, chknew = 1;

	for (curstr = ptr = str; *ptr; ptr++) {
		if (*ptr == ':') {
			/*
			 * We've come to the end of a token within the string.
			 */
			if ((uintptr_t)ptr - (uintptr_t)curstr) {
				/*
				 * If the old or new string checking is still
				 * enabled, we've found a match.
				 */
				if (chkold)
					curold = curstr;
				if (chknew)
					curnew = curstr;
			}
			curstr = (char *)(ptr + 1);

			/*
			 * If an old or new string hasn't yet been matched,
			 * re-enable the checking for either.
			 */
			if (curold == 0) {
				ptrold = old;
				chkold = 1;
			}
			if (curnew == 0) {
				ptrnew = new;
				chknew = 1;
			}
			continue;
		}

		/*
		 * Determine if the current token matches the old or new string.
		 * If not, disable the checking for each string.
		 */
		if (chkold && (*ptr != *ptrold++))
			chkold = 0;
		if (chknew && (*ptr != *ptrnew++))
			chknew = 0;
	}

	/*
	 * We've come to the end of the string, if the old or new string
	 * checking is still enabled, we've found a match.
	 */
	if ((uintptr_t)ptr - (uintptr_t)curstr) {
		if (chkold)
			curold = curstr;
		if (chknew)
			curnew = curstr;
	}

	/*
	 * If an old string hasn't been found, or it has and a new string has
	 * been found, return the original string.
	 */
	if ((curold == 0) || curnew)
		return (str);
	else {
		char	*newstr;
		size_t	len;

		/*
		 * Allocate a new string, enlarged to accommodate the new string
		 * that will be inserted, and an associated separator.
		 */
		if ((curstr = malloc(newlen + 2 +
		    (uintptr_t)ptr - (uintptr_t)str)) == 0)
			return (str);

		newstr = (char *)curstr;
		for (len = (uintptr_t)curold - (uintptr_t)str; len; len--)
			*(newstr++) = *(str++);		/* copy up to */
							/*    insertion point */
		for (len = newlen; len; len--)
			*(newstr++) = *(new++);		/* add new string and */
		*(newstr++) = ':';			/*    separator */
		for (len = (uintptr_t)ptr - (uintptr_t)str; len; len--)
			*(newstr++) = *(str++);		/* add remaining */
		*(newstr++) = '\0';			/*	string */

		return (curstr);
	}
}