nmblookup.c:

  I've added a -r option.  When specified, nmblookup will attempt to bind
  to port 137.  In order for this to work, the user must be root and the
  port must be available (i.e., nmbd not running).  If either condition is
  not met, nmblookup will default to normal behavior; it will try to bind
  to a free port above 7999.  I also removed an artifact.  The -p <port>
  option was being accepted but falling through to the default, which was
  the usage message.  I removed "p:" from the getopt() list.

params.c:
  Rewritten.  The scanning is much more linear, and I found and fixed a
  few bugs.  I don't like the way that the scratch buffer is handled,
  but I believe that it is an improvement over the previous version.

Chris -)-----
(This used to be commit 09dc951f2acd67da9d895e8e00c01e7abbbe0960)

1 files changed, 548 insertions, 307 deletions

diff --git a/source3/param/params.c b/source3/param/params.c
index 0fdde0348f..8c41eef789 100644
--- a/source3/param/params.c
+++ b/source3/param/params.c
@@ -1,326 +1,567 @@
-/* 
-   Unix SMB/Netbios implementation.
-   Version 1.9.
-   Parameter loading utlities
-   Copyright (C) Karl Auer 1993,1994,1997
-   
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-   
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-   
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/**************************************************************************
-PARAMS.C
-
-Copyright (C) 1990, 1991, 1992, 1993, 1994 Karl Auer
-
-This module provides for streamlines retrieval of information from a
-Windows-like parameter files. There is a function which will search for
-all sections in the file and call a specified function with each. There is
-a similar function which will call a specified function for all parameters 
-in a section. The idea is that you pass the addresses of suitable functions
-to a single function in this module which will then enumerate all sections, 
-and within each section all parameters, to your program. 
-
-Parameter files contain text lines (newline delimited) which consist of
-either a section name in square brackets or a parameter name, delimited
-from the parameter value by an equals sign. Blank lines or lines where the
-first non-whitespace character is a colon are ignored. All whitespace in
-section names and parameter names is compressed to single spaces. Leading 
-and trailing whitespace on parameter names and parameter values is stripped.
-
-Only the first equals sign in a parameter line is significant - parameter
-values may contain equals signs, square brackets and semicolons. Internal
-whitespace is retained in parameter values. Parameter names may not start 
-with a square bracket, an equals sign or a semicolon, for obvious reasons. 
-
-A sample parameter file might look like this:
-
-[things]
-this=1
-that=2
-[other things]
-the other = 3
-
-**************************************************************************/
+/* -------------------------------------------------------------------------- **
+ * Microsoft Network Services for Unix, AKA., Andrew Tridgell's SAMBA.
+ *
+ * This module Copyright (C) 1990, 1991, 1992, 1993, 1994 Karl Auer
+ *
+ * Rewritten almost completely by Christopher R. Hertel
+ * at the University of Minnesota, September, 1997.
+ * This module Copyright (C) 1997 by the University of Minnesota
+ * -------------------------------------------------------------------------- **
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * -------------------------------------------------------------------------- **
+ *
+ * Module name: params
+ *
+ * -------------------------------------------------------------------------- **
+ *
+ *  This module performs lexical analysis and initial parsing of a
+ *  Windows-like parameter file.  It recognizes and handles four token
+ *  types:  section-name, parameter-name, parameter-value, and
+ *  end-of-file.  Comments and line continuation are handled
+ *  internally.
+ *
+ *  The entry point to the module is function pm_process().  This
+ *  function opens the source file, calls the Parse() function to parse
+ *  the input, and then closes the file when either the EOF is reached
+ *  or a fatal error is encountered.
+ *
+ *  A sample parameter file might look like this:
+ *
+ *  [section one]
+ *  parameter one = value string
+ *  parameter two = another value
+ *  [section two]
+ *  new parameter = some value or t'other
+ *
+ *  The parameter file is divided into sections by section headers:
+ *  section names enclosed in square brackets (eg. [section one]).
+ *  Each section contains parameter lines, each of which consist of a
+ *  parameter name and value delimited by an equal sign.  Roughly, the
+ *  syntax is:
+ *
+ *    <file>            :==  { <section> } EOF
+ *
+ *    <section>         :==  <section header> { <parameter line> }
+ *
+ *    <section header>  :==  '[' NAME ']'
+ *
+ *    <parameter line>  :==  NAME '=' VALUE '\n'
+ *
+ *  Blank lines and comment lines are ignored.  Comment lines are lines
+ *  beginning with either a semicolon (';') or a pound sign ('#').
+ *
+ *  All whitespace in section names and parameter names is compressed
+ *  to single spaces.  Leading and trailing whitespace is stipped from
+ *  both names and values.
+ *
+ *  Only the first equals sign in a parameter line is significant.
+ *  Parameter values may contain equals signs, square brackets and
+ *  semicolons.  Internal whitespace is retained in parameter values,
+ *  with the exception of the '\r' character, which is stripped for
+ *  historic reasons.  Parameter names may not start with a left square
+ *  bracket, an equal sign, a pound sign, or a semicolon, because these
+ *  are used to identify other tokens.
+ *
+ * -------------------------------------------------------------------------- **
+ */
 
 #include "includes.h"
 
-#include "smb.h"
+/* -------------------------------------------------------------------------- **
+ * Constants...
+ */
 
-/* local variable pointing to passed filename */
-static char *pszParmFile = NULL;
-extern int DEBUGLEVEL;
+#define BUFR_INC 1024
 
 
-/**************************************************************************
-Strip all leading whitespace from a string.
-**************************************************************************/
-static void trimleft(char *psz)
-{
-   char *pszDest;
-
-   pszDest = psz;
-   if (psz != NULL)
-   {
-      while (*psz != '\0' && isspace(*psz))
-	 psz++;
-      while (*psz != '\0')
-	 *pszDest++ = *psz++;
-      *pszDest = '\0';
-   }
-}
-
-/**************************************************************************
-Strip all trailing whitespace from a string.
-**************************************************************************/
-static void trimright(char *psz)
-{
-   char *pszTemp;
-
-   if (psz != NULL && psz[0] != '\0')
-   {
-      pszTemp = psz + strlen(psz) - 1;
-      while (isspace(*pszTemp))
-	 *pszTemp-- = '\0';
-   }
-}
-
-/***********************************************************************
-Collapse each whitespace area in a string to a single space.
-***********************************************************************/
-static void collapse_spaces(char *psz)
-{
-   while (*psz)
-      if (isspace(*psz))
-      {
-	 *psz++ = ' ';
-	 trimleft(psz);
-      }
-      else
-	 psz++;
-}
-
-/**************************************************************************
-Return the value of the first non-white character in the specified string.
-The terminating NUL counts as non-white for the purposes of this function.
-Note - no check for a NULL string! What would we return?
-**************************************************************************/
-static int firstnonwhite(char *psz)
-{
-   while (isspace(*psz) && (*psz != '\0'))
-      psz++;
-   return (*psz);
-}
-
-
-/**************************************************************************
-Identifies all parameters in the current section, calls the parameter
-function for each. Ignores comment lines, stops and backs up in file when
-a section is encountered. Returns True on success, False on error.
-**************************************************************************/
-static BOOL enumerate_parameters(FILE *fileIn, BOOL (*pfunc)(char *,char *))
-{
-   pstring szBuf;
-   char *pszTemp;
-   BOOL bRetval;
-   long lFileOffset;
-   int  cTemp;
-   BOOL bParmFound;
-
-   bRetval = False;
-   bParmFound = False;
-   while (True)
-   {
-      /* first remember where we are */
-      if ((lFileOffset = ftell(fileIn)) >= 0L)
+/* -------------------------------------------------------------------------- **
+ * Variables...
+ *
+ *  DEBUGLEVEL  - The ubiquitous DEBUGLEVEL.  This determines which DEBUG()
+ *                messages will be produced.
+ *  bufr        - pointer to a global buffer.  This is probably a kludge,
+ *                but it was the nicest kludge I could think of (for now).
+ *  bSize       - The size of the global buffer <bufr>.
+ */
+
+extern int DEBUGLEVEL;
+
+static char *bufr  = NULL;
+static int   bSize = 0;
+
+/* -------------------------------------------------------------------------- **
+ * Functions...
+ */
+
+static int EatWhitespace( FILE *InFile )
+  /* ------------------------------------------------------------------------ **
+   * Scan past whitespace (see ctype(3C)) and return the first non-whitespace
+   * character, or newline, or EOF.
+   *
+   *  Input:  InFile  - Input source.
+   *
+   *  Output: The next non-whitespace character in the input stream.
+   *
+   *  Notes:  Because the config files use a line-oriented grammar, we
+   *          explicitly exclude the newline character from the list of
+   *          whitespace characters.
+   *        - Note that both EOF (-1) and the nul character ('\0') are
+   *          considered end-of-file markers.
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  int c;
+
+  for( c = getc( InFile ); isspace( c ) && ('\n' != c); c = getc( InFile ) )
+    ;
+  return( c );
+  } /* EatWhitespace */
+
+static int EatComment( FILE *InFile )
+  /* ------------------------------------------------------------------------ **
+   * Scan to the end of a comment.
+   *
+   *  Input:  InFile  - Input source.
+   *
+   *  Output: The character that marks the end of the comment.  Normally,
+   *          this will be a newline, but it *might* be an EOF.
+   *
+   *  Notes:  Because the config files use a line-oriented grammar, we
+   *          explicitly exclude the newline character from the list of
+   *          whitespace characters.
+   *        - Note that both EOF (-1) and the nul character ('\0') are
+   *          considered end-of-file markers.
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  int c;
+
+  for( c = getc( InFile ); ('\n'!=c) && (EOF!=c) && (c>0); c = getc( InFile ) )
+    ;
+  return( c );
+  } /* EatComment */
+
+static int Continuation( char *line, int pos )
+  /* ------------------------------------------------------------------------ **
+   * Scan backards within a string to discover if the last non-whitespace
+   * character is a line-continuation character ('\\').
+   *
+   *  Input:  line  - A pointer to a buffer containing the string to be
+   *                  scanned.
+   *          pos   - This is taken to be the offset of the end of the
+   *                  string.  This position is *not* scanned.
+   *
+   *  Output: The offset of the '\\' character if it was found, or -1 to
+   *          indicate that it was not.
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  pos--;
+  while( (pos >= 0) && isspace(line[pos]) )
+     pos--;
+
+  return( ((pos >= 0) && ('\\' == line[pos])) ? pos : -1 );
+  } /* Continuation */
+
+
+static BOOL Section( FILE *InFile, BOOL (*sfunc)(char *) )
+  /* ------------------------------------------------------------------------ **
+   * Scan a section name, and pass the name to function sfunc().
+   *
+   *  Input:  InFile  - Input source.
+   *          sfunc   - Pointer to the function to be called if the section
+   *                    name is successfully read.
+   *
+   *  Output: True if the section name was read and True was returned from
+   *          <sfunc>.  False if <sfunc> failed or if a lexical error was
+   *          encountered.
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  int   c;
+  int   i;
+  int   end;
+  char *func  = "params.c:Section() -";
+
+  i = 0;      /* <i> is the offset of the next free byte in bufr[] and  */
+  end = 0;    /* <end> is the current "end of string" offset.  In most  */
+              /* cases these will be the same, but if the last          */
+              /* character written to bufr[] is a space, then <end>     */
+              /* will be one less than <i>.                             */
+
+  c = EatWhitespace( InFile );    /* We've already got the '['.  Scan */
+                                  /* past initial white space.        */
+
+  while( (EOF != c) && (c > 0) )
+    {
+
+    /* Check that the buffer is big enough for the next character. */
+    if( i > (bSize - 2) )
       {
-	 /* then get and check a line */
-	 if (fgets_slash(szBuf, sizeof(szBuf)-1, fileIn) == NULL)
-	 {
-	    /* stop - return OK unless file error */
-	    bRetval = !ferror(fileIn);
-            if (!bRetval)
-	      DEBUG(0,( "Read error on configuration file (enumerating parameters)!\n"));
-	    break;   
-	 }
-	 else
-	    /* if first non-white is a '[', stop (new section) */
-	    if ((cTemp = firstnonwhite(szBuf)) == '[')
-	    {
-	       /* restore position to start of new section */
-	       if (fseek(fileIn, lFileOffset, SEEK_SET) < 0L)
-	       {
-                  DEBUG(0,( "Seek error on configuration file!\n"));
-                  break;
-	       }
-
-	       /* return success */
-	       bRetval = True;
-	       break;
-	    }
-	    else
-	       /* if it's a semicolon or line is blank, ignore the line */
-	       if (!cTemp || strchr(";#",cTemp))
-	       {
-		  continue;
-	       }
-	       else
-		  /* if no equals sign and line contains non-whitespace */
-		  /* then line is badly formed */
-		  if ((pszTemp = strchr(szBuf, '=')) == NULL)
-		  {
-		     DEBUG(0,( "Ignoring badly formed line: %s", szBuf));
-		  }
-		  else
-		  {
-                     /* Note that we have found a parameter */
-                     bParmFound = True;
-		     /* cut line at the equals sign */
-		     *pszTemp++ = '\0';
-		     /* trim leading and trailing space from both halves */
-		     trimright(szBuf);
-		     trimleft(szBuf);
-		     trimright(pszTemp);
-		     trimleft(pszTemp);
-		     /* process the parameter iff passed pointer not NULL */
-		     if (pfunc != NULL)
-                        if (!pfunc(szBuf, pszTemp))
-			   break;
-		  }
+      bSize += BUFR_INC;
+      bufr   = Realloc( bufr, bSize );
+      if( NULL == bufr )
+        {
+        DEBUG(0, ("%s Memory re-allocation failure.", func) );
+        return( False );
+        }
       }
-   }
-   return (bRetval);
-}
-
-
-/***********************************************************************
-Close up s by n chars, at offset start.
-***********************************************************************/
-static void closestr(char *s, int start, int n)
-{
-   char *src;
-   char *dest;
-   int  len;
-
-   if (n > 0)
-      if ((src = dest = s) != NULL)
+
+    /* Handle a single character. */
+    switch( c )
       {
-         len = strlen(s);
-         if (start >= 0 && start < len - n)
-         {
-            src += start + n;
-            dest += start;
-  
-            while (*src)
-               *dest++ = *src++;
-            *dest = '\0';
-         }
+      case ']':                       /* Found the closing bracket.         */
+        bufr[end] = '\0';
+        if( 0 == end )                  /* Don't allow an empty name.       */
+          {
+          DEBUG(0, ("%s Empty section name in configuration file.\n", func ));
+          return( False );
+          }
+        if( !sfunc( bufr ) )            /* Got a valid name.  Deal with it. */
+          return( False );
+        (void)EatComment( InFile );     /* Finish off the line.             */
+        return( True );
+
+      case '\n':                      /* Got newline before closing ']'.    */
+        i = Continuation( bufr, i );    /* Check for line continuation.     */
+        if( i < 0 )
+          {
+          bufr[end] = '\0';
+          DEBUG(0, ("%s Badly formed line in configuration file: %s\n",
+                   func, bufr ));
+          return( False );
+          }
+        end = ( (i > 0) && (' ' == bufr[i - 1]) ) ? (i - 1) : (i);
+        c = getc( InFile );             /* Continue with next line.         */
+        break;
+
+      default:                        /* All else are a valid name chars.   */
+        if( isspace( c ) )              /* One space per whitespace region. */
+          {
+          bufr[end] = ' ';
+          i = end + 1;
+          c = EatWhitespace( InFile );
+          }
+        else                            /* All others copy verbatim.        */
+          {
+          bufr[i++] = c;
+          end = i;
+          c = getc( InFile );
+          }
       }
-}
-
-/**************************************************************************
-Identifies all sections in the parameter file, calls passed section_func()
-for each, passing the section name, then calls enumerate_parameters(). 
-Returns True on success, False on failure. Note that the section and 
-parameter names will have all internal whitespace areas collapsed to a 
-single space for processing.
-**************************************************************************/
-static BOOL enumerate_sections(FILE *fileIn,
-			       BOOL (*sfunc)(char *),BOOL (*pfunc)(char *,char *))
-{
-   pstring szBuf;
-   BOOL bRetval;
-   BOOL bSectionFound;
-
-   /* this makes sure we get include lines right */
-   enumerate_parameters(fileIn, pfunc);
-
-   bRetval = False;
-   bSectionFound = False;
-   while (True)
-   {
-      if (fgets_slash(szBuf, sizeof(szBuf)-1, fileIn) == NULL)
+    }
+
+  /* We arrive here if we've met the EOF before the closing bracket. */
+  DEBUG(0, ("%s Unexpected EOF in the configuration file: %s\n", func, bufr ));
+  return( False );
+  } /* Section */
+
+static BOOL Parameter( FILE *InFile, BOOL (*pfunc)(char *, char *), int c )
+  /* ------------------------------------------------------------------------ **
+   * Scan a parameter name and value, and pass these two fields to pfunc().
+   *
+   *  Input:  InFile  - The input source.
+   *          pfunc   - A pointer to the function that will be called to
+   *                    process the parameter, once it has been scanned.
+   *          c       - The first character of the parameter name, which
+   *                    would have been read by Parse().  Unlike a comment
+   *                    line or a section header, there is no lead-in
+   *                    character that can be discarded.
+   *
+   *  Output: True if the parameter name and value were scanned and processed
+   *          successfully, else False.
+   *
+   *  Notes:  This function is in two parts.  The first loop scans the
+   *          parameter name.  Internal whitespace is compressed, and an
+   *          equal sign (=) terminates the token.  Leading and trailing
+   *          whitespace is discarded.  The second loop scans the parameter
+   *          value.  When both have been successfully identified, they are
+   *          passed to pfunc() for processing.
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  int   i       = 0;    /* Position within bufr. */
+  int   end     = 0;    /* bufr[end] is current end-of-string. */
+  int   vstart  = 0;    /* Starting position of the parameter value. */
+  char *func    = "params.c:Parameter() -";
+
+  /* Read the parameter name. */
+  while( 0 == vstart )  /* Loop until we've found the start of the value. */
+    {
+
+    if( i > (bSize - 2) )       /* Ensure there's space for next char.    */
       {
-	 /* stop - return OK unless file error */
-	 bRetval = !ferror(fileIn);
-         if (!bRetval)
-	   DEBUG(0,( "Read error on configuration file (enumerating sections)!\n"));
-	 break;   
+      bSize += BUFR_INC;
+      bufr   = Realloc( bufr, bSize );
+      if( NULL == bufr )
+        {
+        DEBUG(0, ("%s Memory re-allocation failure.", func) );
+        return( False );
+        }
       }
-      else
+
+    switch( c )
       {
-	 trimleft(szBuf);
-	 trimright(szBuf);
-	 if (szBuf[0] == '[')
-	 {
-	    closestr(szBuf, 0, 1);
-	    if (strlen(szBuf) > 1)
-	       if (szBuf[strlen(szBuf) - 1] == ']')
-	       {  
-		  /* found a section - note the fact */
-                  bSectionFound = True;
-		  /* remove trailing metabracket */
-		  szBuf[strlen(szBuf) - 1] = '\0';
-		  /* remove leading and trailing whitespace from name */
-		  trimleft(szBuf);
-		  trimright(szBuf);
-		  /* reduce all internal whitespace to one space */
-		  collapse_spaces(szBuf);
-		  /* process it - stop if the processing fails */
-		  if (sfunc != NULL)
-                     if (!sfunc(szBuf))
-		        break;
-		  if (!enumerate_parameters(fileIn, pfunc))
-                     break;
-	       }
-	 }
+      case '=':                 /* Equal sign marks end of param name. */
+        if( 0 == end )              /* Don't allow an empty name.      */
+          {
+          DEBUG(0, ("%s Invalid parameter name in config. file.\n", func ));
+          return( False );
+          }
+        bufr[end++] = '\0';         /* Mark end of string & advance.   */
+        i       = end;              /* New string starts here.         */
+        vstart  = end;              /* New string is parameter value.  */
+        bufr[i] = '\0';             /* New string is nul, for now.     */
+        break;
+
+      case '\n':                /* Find continuation char, else error. */
+        i = Continuation( bufr, i );
+        if( i < 0 )
+          {
+          bufr[end] = '\0';
+          DEBUG(1,("%s Ignoring badly formed line in configuration file: %s\n",
+                   func, bufr ));
+          return( True );
+          }
+        end = ( (i > 0) && (' ' == bufr[i - 1]) ) ? (i - 1) : (i);
+        c = getc( InFile );       /* Read past eoln.                   */
+        break;
+
+      case '\0':                /* Shouldn't have EOF within param name. */
+      case EOF:
+        bufr[i] = '\0';
+        DEBUG(1,("%s Unexpected end-of-file at: %s\n", func, bufr ));
+        return( True );
+
+      default:
+        if( isspace( c ) )     /* One ' ' per whitespace region.       */
+          {
+          bufr[end] = ' ';
+          i = end + 1;
+          c = EatWhitespace( InFile );
+          }
+        else                   /* All others verbatim.                 */
+          {
+          bufr[i++] = c;
+          end = i;
+          c = getc( InFile );
+          }
       }
-   }
-
-   return (bRetval);
-}
-
-/**************************************************************************
-Process the passed parameter file.
+    }
 
-Returns True if successful, else False.
-**************************************************************************/
-BOOL pm_process(char *pszFileName,BOOL (*sfunc)(char *),BOOL (*pfunc)(char *,char *))
-{
-   FILE *fileIn;
-   BOOL bRetval;
+  /* Now parse the value. */
+  c = EatWhitespace( InFile );  /* Again, trim leading whitespace. */
+  while( (EOF !=c) && (c > 0) )
+    {
 
-   bRetval = False;
-
-   /* record the filename for use in error messages one day... */
-   pszParmFile = pszFileName;
-
-   if (pszParmFile == NULL || strlen(pszParmFile) < 1)
-      DEBUG(0,( "No configuration filename specified!\n"));
-   else
-      if ((fileIn = fopen(pszParmFile, "r")) == NULL)
-         DEBUG(0,( "Unable to open configuration file \"%s\"!\n", pszParmFile));
-      else
+    if( i > (bSize - 2) )       /* Make sure there's enough room. */
       {
-         DEBUG(3,("Processing configuration file \"%s\"\n", pszParmFile));
-	 bRetval = enumerate_sections(fileIn, sfunc, pfunc);
-	 fclose(fileIn);
+      bSize += BUFR_INC;
+      bufr   = Realloc( bufr, bSize );
+      if( NULL == bufr )
+        {
+        DEBUG(0, ("%s Memory re-allocation failure.", func) );
+        return( False );
+        }
       }
 
-   if (!bRetval)
-     DEBUG(0,("pm_process retuned false\n"));
-   return (bRetval);
-}
-
-
+    switch( c )
+      {
+      case '\r':              /* Explicitly remove '\r' because the older */
+        c = getc( InFile );   /* version called fgets_slash() which also  */
+        break;                /* removes them.                            */
+
+      case '\n':              /* Marks end of value unless there's a '\'. */
+        i = Continuation( bufr, i );
+        if( i < 0 )
+          c = 0;
+        else
+          {
+          for( end = i; (end >= 0) && isspace(bufr[end]); end-- )
+            ;
+          c = getc( InFile );
+          }
+        break;
+
+      default:               /* All others verbatim.  Note that spaces do */
+        bufr[i++] = c;       /* not advance <end>.  This allows trimming  */
+        if( !isspace( c ) )  /* of whitespace at the end of the line.     */
+          end = i;
+        c = getc( InFile );
+        break;
+      }
+    }
+  bufr[end] = '\0';          /* End of value. */
+
+  return( pfunc( bufr, &bufr[vstart] ) );   /* Pass name & value to pfunc().  */
+  } /* Parameter */
+
+static BOOL Parse( FILE *InFile,
+                   BOOL (*sfunc)(char *),
+                   BOOL (*pfunc)(char *, char *) )
+  /* ------------------------------------------------------------------------ **
+   * Scan & parse the input.
+   *
+   *  Input:  InFile  - Input source.
+   *          sfunc   - Function to be called when a section name is scanned.
+   *                    See Section().
+   *          pfunc   - Function to be called when a parameter is scanned.
+   *                    See Parameter().
+   *
+   *  Output: True if the file was successfully scanned, else False.
+   *
+   *  Notes:  The input can be viewed in terms of 'lines'.  There are four
+   *          types of lines:
+   *            Blank      - May contain whitespace, otherwise empty.
+   *            Comment    - First non-whitespace character is a ';' or '#'.
+   *                         The remainder of the line is ignored.
+   *            Section    - First non-whitespace character is a '['.
+   *            Parameter  - The default case.
+   * 
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  int    c;
+  char  *func = "params.c:Parse() -";
+
+  c = EatWhitespace( InFile );
+  while( (EOF != c) && (c > 0) )
+    {
+    switch( c )
+      {
+      case '\n':                        /* Blank line. */
+        c = EatWhitespace( InFile );
+        break;
+
+      case ';':                         /* Comment line. */
+      case '#':
+        c = EatComment( InFile );
+        break;
+
+      case '[':                         /* Section Header. */
+        if( !Section( InFile, sfunc ) )
+          return( False );
+        c = EatWhitespace( InFile );
+        break;
+
+      case '\\':                        /* Bogus backslash. */
+        c = EatWhitespace( InFile );
+        break;
+
+      default:                          /* Parameter line. */
+        if( !Parameter( InFile, pfunc, c ) )
+          return( False );
+        c = EatWhitespace( InFile );
+        break;
+      }
+    }
+  return( True );
+  } /* Parse */
+
+static FILE *OpenConfFile( char *FileName )
+  /* ------------------------------------------------------------------------ **
+   * Open a configuration file.
+   *
+   *  Input:  FileName  - The pathname of the config file to be opened.
+   *
+   *  Output: A pointer of type (FILE *) to the opened file, or NULL if the
+   *          file could not be opened.
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  FILE *OpenedFile;
+  char *func = "params.c:OpenConfFile() -";
+
+  if( NULL == FileName || 0 == *FileName )
+    {
+    DEBUG( 0, ("%s No configuration filename specified.\n", func) );
+    return( NULL );
+    }
+
+  OpenedFile = fopen( FileName, "r" );
+  if( NULL == OpenedFile )
+    {
+    DEBUG( 0,
+      ("%s Unable to open configuration file \"%s\":\n\t%s\n",
+      func, FileName, strerror(errno)) );
+    }
+
+  return( OpenedFile );
+  } /* OpenConfFile */
+
+BOOL pm_process( char *FileName,
+                 BOOL (*sfunc)(char *),
+                 BOOL (*pfunc)(char *, char *) )
+  /* ------------------------------------------------------------------------ **
+   * Process the named parameter file.
+   *
+   *  Input:  FileName  - The pathname of the parameter file to be opened.
+   *          sfunc     - A pointer to a function that will be called when
+   *                      a section name is discovered.
+   *          pfunc     - A pointer to a function that will be called when
+   *                      a parameter name and value are discovered.
+   *
+   *  Output: TRUE if the file was successfully parsed, else FALSE.
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  int   result;
+  FILE *InFile;
+  char *func = "params.c:pm_process() -";
+
+  InFile = OpenConfFile( FileName );          /* Open the config file. */
+  if( NULL == InFile )
+    return( False );
+
+  DEBUG( 3, ("%s Processing configuration file \"%s\"\n", func, FileName) );
+
+  if( NULL != bufr )                          /* If we already have a buffer */
+    result = Parse( InFile, sfunc, pfunc );   /* (recursive call), then just */
+                                              /* use it.                     */
+
+  else                                        /* If we don't have a buffer   */
+    {                                         /* allocate one, then parse,   */
+    bSize = BUFR_INC;                         /* then free.                  */
+    bufr = (char *)malloc( bSize );
+    if( NULL == bufr )
+      {
+      DEBUG(0,("%s memory allocation failure.\n", func));
+      return( False );
+      }
+    result = Parse( InFile, sfunc, pfunc );
+    free( bufr );
+    bufr  = NULL;
+    bSize = 0;
+    }
+
+  if( !result )                               /* Generic failure. */
+    {
+    DEBUG(0,("%s Failed.  Error returned from params.c:parse().\n", func));
+    return( False );
+    }
+
+  return( True );                             /* Generic success. */
+  } /* pm_process */
+
+/* -------------------------------------------------------------------------- */