Initial revision

1 files changed, 1073 insertions, 0 deletions

diff --git a/hw/xfree86/parser/scan.c b/hw/xfree86/parser/scan.c
new file mode 100644
index 000000000..4d8167622
--- /dev/null
+++ b/hw/xfree86/parser/scan.c
@@ -0,0 +1,1073 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/parser/scan.c,v 1.24 2003/01/04 20:20:23 paulo Exp $ */
+/* 
+ * 
+ * Copyright (c) 1997  Metro Link Incorporated
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"), 
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ * 
+ * Except as contained in this notice, the name of the Metro Link shall not be
+ * used in advertising or otherwise to promote the sale, use or other dealings
+ * in this Software without prior written authorization from Metro Link.
+ * 
+ */
+
+/* View/edit this file with tab stops set to 4 */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+
+#if !defined(X_NOT_POSIX)
+#if defined(_POSIX_SOURCE)
+#include <limits.h>
+#else
+#define _POSIX_SOURCE
+#include <limits.h>
+#undef _POSIX_SOURCE
+#endif /* _POSIX_SOURCE */
+#endif /* !X_NOT_POSIX */
+#if !defined(PATH_MAX)
+#if defined(MAXPATHLEN)
+#define PATH_MAX MAXPATHLEN
+#else
+#define PATH_MAX 1024
+#endif /* MAXPATHLEN */
+#endif /* !PATH_MAX */
+
+#if !defined(MAXHOSTNAMELEN)
+#define MAXHOSTNAMELEN 32
+#endif /* !MAXHOSTNAMELEN */
+
+#include "Configint.h"
+#include "xf86tokens.h"
+
+#define CONFIG_BUF_LEN     1024
+
+static int StringToToken (char *, xf86ConfigSymTabRec *);
+
+static FILE *configFile = NULL;
+static int configStart = 0;		/* start of the current token */
+static int configPos = 0;		/* current readers position */
+static int configLineNo = 0;	/* linenumber */
+static char *configBuf, *configRBuf;	/* buffer for lines */
+static char *configPath;		/* path to config file */
+static char *configSection = NULL;	/* name of current section being parsed */
+static int pushToken = LOCK_TOKEN;
+static int eol_seen = 0;		/* private state to handle comments */
+LexRec val;
+
+#ifdef __UNIXOS2__
+extern char *__XOS2RedirRoot(char *path);
+#endif
+
+/* 
+ * xf86strToUL --
+ *
+ *  A portable, but restricted, version of strtoul().  It only understands
+ *  hex, octal, and decimal.  But it's good enough for our needs.
+ */
+unsigned int
+xf86strToUL (char *str)
+{
+	int base = 10;
+	char *p = str;
+	unsigned int tot = 0;
+
+	if (*p == '0')
+	{
+		p++;
+		if ((*p == 'x') || (*p == 'X'))
+		{
+			p++;
+			base = 16;
+		}
+		else
+			base = 8;
+	}
+	while (*p)
+	{
+		if ((*p >= '0') && (*p <= ((base == 8) ? '7' : '9')))
+		{
+			tot = tot * base + (*p - '0');
+		}
+		else if ((base == 16) && (*p >= 'a') && (*p <= 'f'))
+		{
+			tot = tot * base + 10 + (*p - 'a');
+		}
+		else if ((base == 16) && (*p >= 'A') && (*p <= 'F'))
+		{
+			tot = tot * base + 10 + (*p - 'A');
+		}
+		else
+		{
+			return (tot);
+		}
+		p++;
+	}
+	return (tot);
+}
+
+/* 
+ * xf86getToken --
+ *      Read next Token form the config file. Handle the global variable
+ *      pushToken.
+ */
+int
+xf86getToken (xf86ConfigSymTabRec * tab)
+{
+	int c, i;
+
+	/* 
+	 * First check whether pushToken has a different value than LOCK_TOKEN.
+	 * In this case rBuf[] contains a valid STRING/TOKEN/NUMBER. But in the
+	 * oth * case the next token must be read from the input.
+	 */
+	if (pushToken == EOF_TOKEN)
+		return (EOF_TOKEN);
+	else if (pushToken == LOCK_TOKEN)
+	{
+		/*
+		 * eol_seen is only set for the first token after a newline.
+		 */
+		eol_seen = 0;
+
+		c = configBuf[configPos];
+
+		/* 
+		 * Get start of next Token. EOF is handled,
+		 * whitespaces are skipped. 
+		 */
+
+again:
+		if (!c)
+		{
+			if (fgets (configBuf, CONFIG_BUF_LEN - 1, configFile) == NULL)
+			{
+				return (pushToken = EOF_TOKEN);
+			}
+			configLineNo++;
+			configStart = configPos = 0;
+			eol_seen = 1;
+		}
+
+		i = 0;
+		for (;;) {
+			c = configBuf[configPos++];
+			configRBuf[i++] = c;
+			switch (c) {
+				case ' ':
+				case '\t':
+				case '\r':
+					continue;
+				case '\n':
+					i = 0;
+					continue;
+			}
+			break;
+		}
+		if (c == '\0')
+			goto again;
+
+		if (c == '#')
+		{
+			do
+			{
+				configRBuf[i++] = (c = configBuf[configPos++]);
+			}
+			while ((c != '\n') && (c != '\r') && (c != '\0'));
+			configRBuf[i] = '\0';
+			/* XXX no private copy.
+			 * Use xf86addComment when setting a comment.
+			 */
+			val.str = configRBuf;
+			return (COMMENT);
+		}
+
+		/* GJA -- handle '-' and ','  * Be careful: "-hsync" is a keyword. */
+		else if ((c == ',') && !isalpha (configBuf[configPos]))
+		{
+			configStart = configPos;
+			return COMMA;
+		}
+		else if ((c == '-') && !isalpha (configBuf[configPos]))
+		{
+			configStart = configPos;
+			return DASH;
+		}
+
+		configStart = configPos;
+		/* 
+		 * Numbers are returned immediately ...
+		 */
+		if (isdigit (c))
+		{
+			int base;
+
+			if (c == '0')
+				if ((configBuf[configPos] == 'x') ||
+					(configBuf[configPos] == 'X'))
+					base = 16;
+				else
+					base = 8;
+			else
+				base = 10;
+
+			configRBuf[0] = c;
+			i = 1;
+			while (isdigit (c = configBuf[configPos++]) ||
+				   (c == '.') || (c == 'x') || (c == 'X') ||
+				   ((base == 16) && (((c >= 'a') && (c <= 'f')) ||
+									 ((c >= 'A') && (c <= 'F')))))
+				configRBuf[i++] = c;
+			configPos--;		/* GJA -- one too far */
+			configRBuf[i] = '\0';
+			val.num = xf86strToUL (configRBuf);
+			val.realnum = atof (configRBuf);
+			return (NUMBER);
+		}
+
+		/* 
+		 * All Strings START with a \" ...
+		 */
+		else if (c == '\"')
+		{
+			i = -1;
+			do
+			{
+				configRBuf[++i] = (c = configBuf[configPos++]);
+			}
+			while ((c != '\"') && (c != '\n') && (c != '\r') && (c != '\0'));
+			configRBuf[i] = '\0';
+			val.str = xf86confmalloc (strlen (configRBuf) + 1);
+			strcpy (val.str, configRBuf);	/* private copy ! */
+			return (STRING);
+		}
+
+		/* 
+		 * ... and now we MUST have a valid token.  The search is
+		 * handled later along with the pushed tokens.
+		 */
+		else
+		{
+			configRBuf[0] = c;
+			i = 0;
+			do
+			{
+				configRBuf[++i] = (c = configBuf[configPos++]);;
+			}
+			while ((c != ' ') && (c != '\t') && (c != '\n') && (c != '\r') && (c != '\0') && (c != '#'));
+			--configPos;
+			configRBuf[i] = '\0';
+			i = 0;
+		}
+
+	}
+	else
+	{
+
+		/* 
+		 * Here we deal with pushed tokens. Reinitialize pushToken again. If
+		 * the pushed token was NUMBER || STRING return them again ...
+		 */
+		int temp = pushToken;
+		pushToken = LOCK_TOKEN;
+
+		if (temp == COMMA || temp == DASH)
+			return (temp);
+		if (temp == NUMBER || temp == STRING)
+			return (temp);
+	}
+
+	/* 
+	 * Joop, at last we have to lookup the token ...
+	 */
+	if (tab)
+	{
+		i = 0;
+		while (tab[i].token != -1)
+			if (xf86nameCompare (configRBuf, tab[i].name) == 0)
+				return (tab[i].token);
+			else
+				i++;
+	}
+
+	return (ERROR_TOKEN);		/* Error catcher */
+}
+
+int
+xf86getSubToken (char **comment)
+{
+	int token;
+
+	for (;;) {
+		token = xf86getToken(NULL);
+		if (token == COMMENT) {
+			if (comment)
+				*comment = xf86addComment(*comment, val.str);
+		}
+		else
+			return (token);
+	}
+	/*NOTREACHED*/
+}
+
+int
+xf86getSubTokenWithTab (char **comment, xf86ConfigSymTabRec *tab)
+{
+	int token;
+
+	for (;;) {
+		token = xf86getToken(tab);
+		if (token == COMMENT) {
+			if (comment)
+				*comment = xf86addComment(*comment, val.str);
+		}
+		else
+			return (token);
+	}
+	/*NOTREACHED*/
+}
+
+void
+xf86unGetToken (int token)
+{
+	pushToken = token;
+}
+
+char *
+xf86tokenString (void)
+{
+	return configRBuf;
+}
+
+#if 1
+int
+xf86pathIsAbsolute(const char *path)
+{
+	if (path && path[0] == '/')
+		return 1;
+#ifdef __UNIXOS2__
+	if (path && (path[0] == '\\' || (path[1] == ':')))
+		return 0;
+#endif
+	return 0;
+}
+
+/* A path is "safe" if it is relative and if it contains no ".." elements. */
+int
+xf86pathIsSafe(const char *path)
+{
+	if (xf86pathIsAbsolute(path))
+		return 0;
+
+	/* Compare with ".." */
+	if (!strcmp(path, ".."))
+		return 0;
+
+	/* Look for leading "../" */
+	if (!strncmp(path, "../", 3))
+		return 0;
+
+	/* Look for trailing "/.." */
+	if ((strlen(path) > 3) && !strcmp(path + strlen(path) - 3, "/.."))
+		return 0;
+
+	/* Look for "/../" */
+	if (strstr(path, "/../"))
+		return 0;
+
+	return 1;
+}
+
+/*
+ * This function substitutes the following escape sequences:
+ *
+ *    %A    cmdline argument as an absolute path (must be absolute to match)
+ *    %R    cmdline argument as a relative path
+ *    %S    cmdline argument as a "safe" path (relative, and no ".." elements)
+ *    %X    default config file name ("XF86Config")
+ *    %H    hostname
+ *    %E    config file environment ($XF86CONFIG) as an absolute path
+ *    %F    config file environment ($XF86CONFIG) as a relative path
+ *    %G    config file environment ($XF86CONFIG) as a safe path
+ *    %D    $HOME
+ *    %P    projroot
+ *    %M    major version number
+ *    %%    %
+ *    %&    UNIXOS2 only: prepend X11ROOT env var
+ */
+
+#ifndef XCONFIGFILE
+#define XCONFIGFILE	"XF86Config"
+#endif
+#ifndef PROJECTROOT
+#define PROJECTROOT	"/usr/X11R6"
+#endif
+#ifndef XCONFENV
+#define XCONFENV	"XF86CONFIG"
+#endif
+#ifndef XF86_VERSION_MAJOR
+#ifdef XVERSION
+#if XVERSION > 40000000
+#define XF86_VERSION_MAJOR	(XVERSION / 10000000)
+#else
+#define XF86_VERSION_MAJOR	(XVERSION / 1000)
+#endif
+#else
+#define XF86_VERSION_MAJOR	4
+#endif
+#endif
+
+#define BAIL_OUT		do {									\
+							xf86conffree(result);				\
+							return NULL;						\
+						} while (0)
+
+#define CHECK_LENGTH	do {									\
+							if (l > PATH_MAX) {					\
+								BAIL_OUT;						\
+							}									\
+						} while (0)
+
+#define APPEND_STR(s)	do {									\
+							if (strlen(s) + l > PATH_MAX) {		\
+								BAIL_OUT;						\
+							} else {							\
+								strcpy(result + l, s);			\
+								l += strlen(s);					\
+							}									\
+						} while (0)
+
+static char *
+DoSubstitution(const char *template, const char *cmdline, const char *projroot,
+				int *cmdlineUsed, int *envUsed)
+{
+	char *result;
+	int i, l;
+	static const char *env = NULL, *home = NULL;
+	static char *hostname = NULL;
+	static char majorvers[3] = "";
+#ifdef __UNIXOS2__
+	static char *x11root = NULL;
+#endif
+
+	if (!template)
+		return NULL;
+
+	if (cmdlineUsed)
+		*cmdlineUsed = 0;
+	if (envUsed)
+		*envUsed = 0;
+
+	result = xf86confmalloc(PATH_MAX + 1);
+	l = 0;
+	for (i = 0; template[i]; i++) {
+		if (template[i] != '%') {
+			result[l++] = template[i];
+			CHECK_LENGTH;
+		} else {
+			switch (template[++i]) {
+			case 'A':
+				if (cmdline && xf86pathIsAbsolute(cmdline)) {
+					APPEND_STR(cmdline);
+					if (cmdlineUsed)
+						*cmdlineUsed = 1;
+				} else
+					BAIL_OUT;
+				break;
+			case 'R':
+				if (cmdline && !xf86pathIsAbsolute(cmdline)) {
+					APPEND_STR(cmdline);
+					if (cmdlineUsed)
+						*cmdlineUsed = 1;
+				} else 
+					BAIL_OUT;
+				break;
+			case 'S':
+				if (cmdline && xf86pathIsSafe(cmdline)) {
+					APPEND_STR(cmdline);
+					if (cmdlineUsed)
+						*cmdlineUsed = 1;
+				} else 
+					BAIL_OUT;
+				break;
+			case 'X':
+				APPEND_STR(XCONFIGFILE);
+				break;
+			case 'H':
+				if (!hostname) {
+					if ((hostname = xf86confmalloc(MAXHOSTNAMELEN + 1))) {
+						if (gethostname(hostname, MAXHOSTNAMELEN) == 0) {
+							hostname[MAXHOSTNAMELEN] = '\0';
+						} else {
+							xf86conffree(hostname);
+							hostname = NULL;
+						}
+					}
+				}
+				if (hostname)
+					APPEND_STR(hostname);
+				break;
+			case 'E':
+				if (!env)
+					env = getenv(XCONFENV);
+				if (env && xf86pathIsAbsolute(env)) {
+					APPEND_STR(env);
+					if (envUsed)
+						*envUsed = 1;
+				} else
+					BAIL_OUT;
+				break;
+			case 'F':
+				if (!env)
+					env = getenv(XCONFENV);
+				if (env && !xf86pathIsAbsolute(env)) {
+					APPEND_STR(env);
+					if (envUsed)
+						*envUsed = 1;
+				} else
+					BAIL_OUT;
+				break;
+			case 'G':
+				if (!env)
+					env = getenv(XCONFENV);
+				if (env && xf86pathIsSafe(env)) {
+					APPEND_STR(env);
+					if (envUsed)
+						*envUsed = 1;
+				} else
+					BAIL_OUT;
+				break;
+			case 'D':
+				if (!home)
+					home = getenv("HOME");
+				if (home && xf86pathIsAbsolute(home))
+					APPEND_STR(home);
+				else
+					BAIL_OUT;
+				break;
+			case 'P':
+				if (projroot && xf86pathIsAbsolute(projroot))
+					APPEND_STR(projroot);
+				else
+					BAIL_OUT;
+				break;
+			case 'M':
+				if (!majorvers[0]) {
+					if (XF86_VERSION_MAJOR < 0 || XF86_VERSION_MAJOR > 99) {
+						fprintf(stderr, "XF86_VERSION_MAJOR is out of range\n");
+						BAIL_OUT;
+					} else
+						sprintf(majorvers, "%d", XF86_VERSION_MAJOR);
+				}
+				APPEND_STR(majorvers);
+				break;
+			case '%':
+				result[l++] = '%';
+				CHECK_LENGTH;
+				break;
+#ifdef __UNIXOS2__
+			case '&':
+				if (!x11root)
+					x11root = getenv("X11ROOT");
+				if (x11root)
+					APPEND_STR(x11root);
+				else
+					BAIL_OUT;
+				break;
+#endif
+			default:
+				fprintf(stderr, "invalid escape %%%c found in path template\n",
+						template[i]);
+				BAIL_OUT;
+				break;
+			}
+		}
+	}
+#ifdef DEBUG
+	fprintf(stderr, "Converted `%s' to `%s'\n", template, result);
+#endif
+	return result;
+}
+
+/* 
+ * xf86openConfigFile --
+ *
+ * This function take a config file search path (optional), a command-line
+ * specified file name (optional) and the ProjectRoot path (optional) and
+ * locates and opens a config file based on that information.  If a
+ * command-line file name is specified, then this function fails if none
+ * of the located files.
+ *
+ * The return value is a pointer to the actual name of the file that was
+ * opened.  When no file is found, the return value is NULL.
+ *
+ * The escape sequences allowed in the search path are defined above.
+ *  
+ */
+
+#ifndef DEFAULT_CONF_PATH
+#define DEFAULT_CONF_PATH	"/etc/X11/%S," \
+							"%P/etc/X11/%S," \
+							"/etc/X11/%G," \
+							"%P/etc/X11/%G," \
+							"/etc/X11/%X-%M," \
+							"/etc/X11/%X," \
+							"/etc/%X," \
+							"%P/etc/X11/%X.%H," \
+							"%P/etc/X11/%X-%M," \
+							"%P/etc/X11/%X," \
+							"%P/lib/X11/%X.%H," \
+							"%P/lib/X11/%X-%M," \
+							"%P/lib/X11/%X"
+#endif
+
+const char *
+xf86openConfigFile(const char *path, const char *cmdline, const char *projroot)
+{
+	char *pathcopy;
+	const char *template;
+	int cmdlineUsed = 0;
+
+	configFile = NULL;
+	configStart = 0;		/* start of the current token */
+	configPos = 0;		/* current readers position */
+	configLineNo = 0;	/* linenumber */
+	pushToken = LOCK_TOKEN;
+
+	if (!path || !path[0])
+		path = DEFAULT_CONF_PATH;
+	pathcopy = xf86confmalloc(strlen(path) + 1);
+	strcpy(pathcopy, path);
+	if (!projroot || !projroot[0])
+		projroot = PROJECTROOT;
+
+	template = strtok(pathcopy, ",");
+
+	/* First, search for a config file. */
+	while (template && !configFile) {
+		if ((configPath = DoSubstitution(template, cmdline, projroot,
+										 &cmdlineUsed, NULL))) {
+			if ((configFile = fopen(configPath, "r")) != 0) {
+				if (cmdline && !cmdlineUsed) {
+					fclose(configFile);
+					configFile = NULL;
+				}
+			}
+		}
+		if (configPath && !configFile) {
+			xf86conffree(configPath);
+			configPath = NULL;
+		}
+		template = strtok(NULL, ",");
+	}
+	xf86conffree(pathcopy);
+	if (!configFile) {
+
+		return NULL;
+	}
+
+	configBuf = xf86confmalloc (CONFIG_BUF_LEN);
+	configRBuf = xf86confmalloc (CONFIG_BUF_LEN);
+	configBuf[0] = '\0';		/* sanity ... */
+
+	return configPath;
+}
+#else
+/* 
+ * xf86openConfigFile --
+ *
+ * Formerly findConfigFile(). This function take a pointer to a location
+ * in which to place the actual name of the file that was opened.
+ * This function uses the global character array xf86ConfigFile
+ * This function returns the following results.
+ *
+ *  0   unable to open the config file
+ *  1   file opened and ready to read
+ *  
+ */
+
+int
+xf86openConfigFile (char *filename)
+{
+#define MAXPTRIES   6
+	char *home = NULL;
+	char *xconfig = NULL;
+	char *xwinhome = NULL;
+	char *configPaths[MAXPTRIES];
+	int pcount = 0, idx;
+
+/* 
+ * First open if necessary the config file.
+ * If the -xf86config flag was used, use the name supplied there (root only).
+ * If $XF86CONFIG is a pathname, use it as the name of the config file (root)
+ * If $XF86CONFIG is set but doesn't contain a '/', append it to 'XF86Config'
+ *   and search the standard places (root only).
+ * If $XF86CONFIG is not set, just search the standard places.
+ */
+	configFile = NULL;
+	configStart = 0;		/* start of the current token */
+	configPos = 0;		/* current readers position */
+	configLineNo = 0;	/* linenumber */
+	pushToken = LOCK_TOKEN;
+	while (!configFile)
+	{
+
+		/* 
+		 * configPaths[0]   is used as a buffer for -xf86config
+		 *                  and $XF86CONFIG if it contains a path
+		 * configPaths[1...MAXPTRIES-1] is used to store the paths of each of
+		 *                  the other attempts
+		 */
+		for (pcount = idx = 0; idx < MAXPTRIES; idx++)
+			configPaths[idx] = NULL;
+
+		/* 
+		 * First check if the -xf86config option was used.
+		 */
+		configPaths[pcount] = xf86confmalloc (PATH_MAX);
+		if (xf86ConfigFile[0])
+		{
+			strcpy (configPaths[pcount], xf86ConfigFile);
+			if ((configFile = fopen (configPaths[pcount], "r")) != 0)
+				break;
+			else
+				return 0;
+		}
+		/* 
+		 * Check if XF86CONFIG is set.
+		 */
+#ifndef __UNIXOS2__
+		if (getuid () == 0
+			&& (xconfig = getenv ("XF86CONFIG")) != 0
+			&& strchr (xconfig, '/'))
+#else
+		/* no root available, and filenames start with drive letter */
+		if ((xconfig = getenv ("XF86CONFIG")) != 0
+			&& isalpha (xconfig[0])
+			&& xconfig[1] == ':')
+#endif
+		{
+			strcpy (configPaths[pcount], xconfig);
+			if ((configFile = fopen (configPaths[pcount], "r")) != 0)
+				break;
+			else
+				return 0;
+		}
+
+#ifndef __UNIXOS2__
+		/* 
+		 * ~/XF86Config ...
+		 */
+		if (getuid () == 0 && (home = getenv ("HOME")) != NULL)
+		{
+			configPaths[++pcount] = xf86confmalloc (PATH_MAX);
+			strcpy (configPaths[pcount], home);
+			strcat (configPaths[pcount], "/" XCONFIGFILE);
+			if (xconfig)
+				strcat (configPaths[pcount], xconfig);
+			if ((configFile = fopen (configPaths[pcount], "r")) != 0)
+				break;
+		}
+
+		/* 
+		 * /etc/XF86Config
+		 */
+		configPaths[++pcount] = xf86confmalloc (PATH_MAX);
+		strcpy (configPaths[pcount], "/etc/" XCONFIGFILE);
+		if (xconfig)
+			strcat (configPaths[pcount], xconfig);
+		if ((configFile = fopen (configPaths[pcount], "r")) != 0)
+			break;
+
+		/* 
+		 * $(XCONFIGDIR)/XF86Config.<hostname>
+		 */
+
+		configPaths[++pcount] = xf86confmalloc (PATH_MAX);
+		if (getuid () == 0 && (xwinhome = getenv ("XWINHOME")) != NULL)
+			sprintf (configPaths[pcount], "%s/lib/X11/" XCONFIGFILE, xwinhome);
+		else
+			strcpy (configPaths[pcount], XCONFIGDIR "/" XCONFIGFILE);
+		if (getuid () == 0 && xconfig)
+			strcat (configPaths[pcount], xconfig);
+		strcat (configPaths[pcount], ".");
+		gethostname (configPaths[pcount] + strlen (configPaths[pcount]),
+					 MAXHOSTNAMELEN);
+		if ((configFile = fopen (configPaths[pcount], "r")) != 0)
+			break;
+#endif /* !__UNIXOS2__  */
+
+		/* 
+		 * $(XCONFIGDIR)/XF86Config
+		 */
+		configPaths[++pcount] = xf86confmalloc (PATH_MAX);
+#ifndef __UNIXOS2__
+		if (getuid () == 0 && xwinhome)
+			sprintf (configPaths[pcount], "%s/lib/X11/" XCONFIGFILE, xwinhome);
+		else
+			strcpy (configPaths[pcount], XCONFIGDIR "/" XCONFIGFILE);
+		if (getuid () == 0 && xconfig)
+			strcat (configPaths[pcount], xconfig);
+#else
+		/*
+		 * we explicitly forbid numerous config files everywhere for OS/2;
+		 * users should consider them lucky to have one in a standard place
+		 * and another one with the -xf86config option
+		 */
+		xwinhome = getenv ("X11ROOT");	/* get drive letter */
+		if (!xwinhome) {
+			fprintf (stderr,"X11ROOT environment variable not set\n");
+			exit(2);
+		}
+		strcpy (configPaths[pcount], __XOS2RedirRoot ("/XFree86/lib/X11/XConfig"));
+#endif
+
+		if ((configFile = fopen (configPaths[pcount], "r")) != 0)
+			break;
+
+		return 0;
+	}
+	configBuf = xf86confmalloc (CONFIG_BUF_LEN);
+	configRBuf = xf86confmalloc (CONFIG_BUF_LEN);
+	configPath = xf86confmalloc (PATH_MAX);
+
+	strcpy (configPath, configPaths[pcount]);
+
+	if (filename)
+		strcpy (filename, configPaths[pcount]);
+	for (idx = 0; idx <= pcount; idx++)
+		if (configPaths[idx] != NULL)
+			xf86conffree (configPaths[idx]);
+
+	configBuf[0] = '\0';		/* sanity ... */
+
+	return 1;
+}
+#endif
+
+void
+xf86closeConfigFile (void)
+{
+	xf86conffree (configPath);
+	configPath = NULL;
+	xf86conffree (configRBuf);
+	configRBuf = NULL;
+	xf86conffree (configBuf);
+	configBuf = NULL;
+
+	fclose (configFile);
+	configFile = NULL;
+}
+
+void
+xf86parseError (char *format,...)
+{
+	va_list ap;
+
+#if 0
+	fprintf (stderr, "Parse error on line %d of section %s in file %s\n",
+			 configLineNo, configSection, configPath);
+	fprintf (stderr, "\t");
+	va_start (ap, format);
+	vfprintf (stderr, format, ap);
+	va_end (ap);
+
+	fprintf (stderr, "\n");
+#else
+	ErrorF ("Parse error on line %d of section %s in file %s\n\t",
+		 configLineNo, configSection, configPath);
+	va_start (ap, format);
+	VErrorF (format, ap);
+	va_end (ap);
+
+	ErrorF ("\n");
+#endif
+
+}
+
+void
+xf86parseWarning (char *format,...)
+{
+	va_list ap;
+
+#if 0
+	fprintf (stderr, "Parse warning on line %d of section %s in file %s\n",
+			 configLineNo, configSection, configPath);
+	fprintf (stderr, "\t");
+	va_start (ap, format);
+	vfprintf (stderr, format, ap);
+	va_end (ap);
+
+	fprintf (stderr, "\n");
+#else
+	ErrorF ("Parse warning on line %d of section %s in file %s\n\t",
+		 configLineNo, configSection, configPath);
+	va_start (ap, format);
+	VErrorF (format, ap);
+	va_end (ap);
+
+	ErrorF ("\n");
+#endif
+}
+
+void
+xf86validationError (char *format,...)
+{
+	va_list ap;
+
+#if 0
+	fprintf (stderr, "Data incomplete in file %s\n",
+			 configPath);
+	fprintf (stderr, "\t");
+	va_start (ap, format);
+	vfprintf (stderr, format, ap);
+	va_end (ap);
+
+	fprintf (stderr, "\n");
+#else
+	ErrorF ("Data incomplete in file %s\n\t", configPath);
+	va_start (ap, format);
+	VErrorF (format, ap);
+	va_end (ap);
+
+	ErrorF ("\n");
+#endif
+}
+
+void
+xf86setSection (char *section)
+{
+	if (configSection)
+		xf86conffree(configSection);
+	configSection = xf86confmalloc(strlen (section) + 1);
+	strcpy (configSection, section);
+}
+
+/* 
+ * xf86getToken --
+ *  Lookup a string if it is actually a token in disguise.
+ */
+int
+xf86getStringToken (xf86ConfigSymTabRec * tab)
+{
+	return StringToToken (val.str, tab);
+}
+
+static int
+StringToToken (char *str, xf86ConfigSymTabRec * tab)
+{
+	int i;
+
+	for (i = 0; tab[i].token != -1; i++)
+	{
+		if (!xf86nameCompare (tab[i].name, str))
+			return tab[i].token;
+	}
+	return (ERROR_TOKEN);
+}
+
+
+/* 
+ * Compare two names.  The characters '_', ' ', and '\t' are ignored
+ * in the comparison.
+ */
+int
+xf86nameCompare (const char *s1, const char *s2)
+{
+	char c1, c2;
+
+	if (!s1 || *s1 == 0) {
+		if (!s2 || *s2 == 0)
+			return (0);
+		else
+			return (1);
+		}
+
+	while (*s1 == '_' || *s1 == ' ' || *s1 == '\t')
+		s1++;
+	while (*s2 == '_' || *s2 == ' ' || *s2 == '\t')
+		s2++;
+	c1 = (isupper (*s1) ? tolower (*s1) : *s1);
+	c2 = (isupper (*s2) ? tolower (*s2) : *s2);
+	while (c1 == c2)
+	{
+		if (c1 == '\0')
+			return (0);
+		s1++;
+		s2++;
+		while (*s1 == '_' || *s1 == ' ' || *s1 == '\t')
+			s1++;
+		while (*s2 == '_' || *s2 == ' ' || *s2 == '\t')
+			s2++;
+		c1 = (isupper (*s1) ? tolower (*s1) : *s1);
+		c2 = (isupper (*s2) ? tolower (*s2) : *s2);
+	}
+	return (c1 - c2);
+}
+
+char *
+xf86addComment(char *cur, char *add)
+{
+	char *str;
+	int len, curlen, iscomment, hasnewline = 0, endnewline;
+
+	if (add == NULL || add[0] == '\0')
+		return (cur);
+
+	if (cur) {
+		curlen = strlen(cur);
+		if (curlen)
+		    hasnewline = cur[curlen - 1] == '\n';
+		eol_seen = 0;
+	}
+	else
+		curlen = 0;
+
+	str = add;
+	iscomment = 0;
+	while (*str) {
+	    if (*str != ' ' && *str != '\t')
+		break;
+	    ++str;
+	}
+	iscomment = (*str == '#');
+
+	len = strlen(add);
+	endnewline = add[len - 1] == '\n';
+	len +=  1 + iscomment + (!hasnewline) + (!endnewline) + eol_seen;
+
+	if ((str = xf86confrealloc(cur, len + curlen)) == NULL)
+		return (cur);
+
+	cur = str;
+
+	if (eol_seen || (curlen && !hasnewline))
+		cur[curlen++] = '\n';
+	if (!iscomment)
+		cur[curlen++] = '#';
+	strcpy(cur + curlen, add);
+	if (!endnewline)
+		strcat(cur, "\n");
+
+	return (cur);
+}