/*
 *  Name: dos2unix
 *  Documentation:
 *    Remove cr ('\x0d') characters from a file.
 *
 *  The dos2unix package is distributed under FreeBSD style license.
 *  See also http://www.freebsd.org/copyright/freebsd-license.html
 *  --------
 *
 *  Copyright (C) 2009-2012 Erwin Waterlander
 *  Copyright (C) 1998 Christian Wurll
 *  Copyright (C) 1998 Bernd Johannes Wuebben
 *  Copyright (C) 1994-1995 Benjamin Lin.
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice in the documentation and/or other materials provided with
 *     the distribution.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
 *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 *  OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 *  OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 *  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  == 1.0 == 1989.10.04 == John Birchfield (jb@koko.csustan.edu)
 *  == 1.1 == 1994.12.20 == Benjamin Lin (blin@socs.uts.edu.au)
 *     Cleaned up for Borland C/C++ 4.02
 *  == 1.2 == 1995.03.16 == Benjamin Lin (blin@socs.uts.edu.au)
 *     Modified to more conform to UNIX style.
 *  == 2.0 == 1995.03.19 == Benjamin Lin (blin@socs.uts.edu.au)
 *     Rewritten from scratch.
 *  == 2.1 == 1995.03.29 == Benjamin Lin (blin@socs.uts.edu.au)
 *     Conversion to SunOS charset implemented.
 *  == 2.2 == 1995.03.30 == Benjamin Lin (blin@socs.uts.edu.au)
 *     Fixed a bug in 2.1 where in new file mode, if outfile already exists
 *     conversion can not be completed properly.
 *
 * Added Mac text file translation, i.e. \r to \n conversion
 * Bernd Johannes Wuebben, wuebben@kde.org
 * Wed Feb  4 19:12:58 EST 1998
 *
 * Added extra newline if ^M occurs
 * Christian Wurll, wurll@ira.uka.de
 * Thu Nov 19 1998
 *
 *  See ChangeLog.txt for complete version history.
 *
 */


/* #define DEBUG 1 */

#include "common.h"
#include "dos2unix.h"
#include "querycp.h"
#ifdef D2U_UNICODE
#if !defined(__MSDOS__) && !defined(__WIN32__) && !defined(__OS2__)  /* Unix, Cygwin */
# include <langinfo.h>
#endif
#endif

void PrintLicense(void)
{
  fprintf(stderr, "%s", _("\
Copyright (C) 2009-2012 Erwin Waterlander\n\
Copyright (C) 1998      Christian Wurll (Version 3.1)\n\
Copyright (C) 1998      Bernd Johannes Wuebben (Version 3.0)\n\
Copyright (C) 1994-1995 Benjamin Lin\n\
All rights reserved.\n\n"));
  PrintBSDLicense();
}

#ifdef D2U_UNICODE
void StripDelimiterW(FILE* ipInF, FILE* ipOutF, CFlag *ipFlag, wint_t CurChar)
{
  wint_t TempNextChar;
  /* CurChar is always CR (x0d) */
  /* In normal dos2unix mode put nothing (skip CR). */
  /* Don't modify Mac files when in dos2unix mode. */
  if ( (TempNextChar = d2u_getwc(ipInF, ipFlag->bomtype)) != WEOF) {
    d2u_ungetwc( TempNextChar, ipInF, ipFlag->bomtype);  /* put back peek char */
    if ( TempNextChar != 0x0a ) {
      d2u_putwc( CurChar, ipOutF, ipFlag);  /* Mac line, put back CR */
    }
  }
  else if ( CurChar == 0x0d ) {  /* EOF: last Mac line delimiter (CR)? */
    d2u_putwc( CurChar, ipOutF, ipFlag);
  }
  if (ipFlag->NewLine) {  /* add additional LF? */
    d2u_putwc(0x0a, ipOutF, ipFlag);
  }
}
#endif

void StripDelimiter(FILE* ipInF, FILE* ipOutF, CFlag *ipFlag, int CurChar)
{
  int TempNextChar;
  /* CurChar is always CR (x0d) */
  /* In normal dos2unix mode put nothing (skip CR). */
  /* Don't modify Mac files when in dos2unix mode. */
  if ( (TempNextChar = fgetc(ipInF)) != EOF) {
    ungetc( TempNextChar, ipInF );  /* put back peek char */
    if ( TempNextChar != '\x0a' ) {
      fputc( CurChar, ipOutF );  /* Mac line, put back CR */
    }
  }
  else if ( CurChar == '\x0d' ) {  /* EOF: last Mac line delimiter (CR)? */
    fputc( CurChar, ipOutF );
  }
  if (ipFlag->NewLine) {  /* add additional LF? */
    fputc('\x0a', ipOutF);
  }
}

/* converts stream ipInF to UNIX format text and write to stream ipOutF
 * RetVal: 0  if success
 *         -1  otherwise
 */
#ifdef D2U_UNICODE
int ConvertDosToUnixW(FILE* ipInF, FILE* ipOutF, CFlag *ipFlag, char *progname)
{
    int RetVal = 0;
    wint_t TempChar;
    wint_t TempNextChar;
    int line_nr = 1;

    ipFlag->status = 0;

    /* CR-LF -> LF */
    /* LF    -> LF, in case the input file is a Unix text file */
    /* CR    -> CR, in dos2unix mode (don't modify Mac file) */
    /* CR    -> LF, in Mac mode */
    /* \x0a = Newline/Line Feed (LF) */
    /* \x0d = Carriage Return (CR) */

    switch (ipFlag->FromToMode)
    {
      case FROMTO_DOS2UNIX: /* dos2unix */
        while ((TempChar = d2u_getwc(ipInF, ipFlag->bomtype)) != WEOF) {  /* get character */
          if ((ipFlag->Force == 0) &&
              (TempChar < 32) &&
              (TempChar != 0x0a) &&  /* Not an LF */
              (TempChar != 0x0d) &&  /* Not a CR */
              (TempChar != 0x09) &&  /* Not a TAB */
              (TempChar != 0x0c)) {  /* Not a form feed */
            RetVal = -1;
            ipFlag->status |= BINARY_FILE ;
            if (!ipFlag->Quiet)
            {
              fprintf(stderr, "%s: ", progname);
              fprintf(stderr, _("Binary symbol found at line %d\n"), line_nr);
            }
            break;
          }
          if (TempChar != 0x0d) {
            if (TempChar == 0x0a) /* Count all DOS and Unix line breaks */
              ++line_nr;
            if (d2u_putwc(TempChar, ipOutF, ipFlag) == WEOF) {
              RetVal = -1;
              if (!ipFlag->Quiet)
              {
                if (!(ipFlag->status & UNICODE_CONVERSION_ERROR))
                {
                  fprintf(stderr, "%s: ", progname);
                  fprintf(stderr, "%s", _("can not write to output file\n"));
                }
              }
              break;
            }
          } else {
            StripDelimiterW( ipInF, ipOutF, ipFlag, TempChar );
          }
        }
        break;
      case FROMTO_MAC2UNIX: /* mac2unix */
        while ((TempChar = d2u_getwc(ipInF, ipFlag->bomtype)) != WEOF) {
          if ((ipFlag->Force == 0) &&
              (TempChar < 32) &&
              (TempChar != 0x0a) &&  /* Not an LF */
              (TempChar != 0x0d) &&  /* Not a CR */
              (TempChar != 0x09) &&  /* Not a TAB */
              (TempChar != 0x0c)) {  /* Not a form feed */
            RetVal = -1;
            ipFlag->status |= BINARY_FILE ;
            if (!ipFlag->Quiet)
            {
              fprintf(stderr, "%s: ", progname);
              fprintf(stderr, _("Binary symbol found at line %d\n"), line_nr);
            }
            break;
          }
          if ((TempChar != 0x0d))
            {
              if (TempChar == 0x0a) /* Count all DOS and Unix line breaks */
                ++line_nr;
              if(d2u_putwc(TempChar, ipOutF, ipFlag) == WEOF){
                RetVal = -1;
                if (!ipFlag->Quiet)
                {
                  if (!(ipFlag->status & UNICODE_CONVERSION_ERROR))
                  {
                    fprintf(stderr, "%s: ", progname);
                    fprintf(stderr, "%s", _("can not write to output file\n"));
                  }
                }
                break;
              }
            }
          else{
            /* TempChar is a CR */
            if ( (TempNextChar = d2u_getwc(ipInF, ipFlag->bomtype)) != WEOF) {
              ungetc( TempNextChar, ipInF );  /* put back peek char */
              /* Don't touch this delimiter if it's a CR,LF pair. */
              if ( TempNextChar == 0x0a ) {
                d2u_putwc(0x0d, ipOutF, ipFlag); /* put CR, part of DOS CR-LF */
                continue;
              }
            }
            if (d2u_putwc(0x0a, ipOutF, ipFlag) == WEOF) /* MAC line end (CR). Put LF */
              {
                RetVal = -1;
                if (!ipFlag->Quiet)
                {
                  if (!(ipFlag->status & UNICODE_CONVERSION_ERROR))
                  {
                    fprintf(stderr, "%s: ", progname);
                    fprintf(stderr, "%s", _("can not write to output file\n"));
                  }
                }
                break;
              }
            line_nr++; /* Count all Mac line breaks */
            if (ipFlag->NewLine) {  /* add additional LF? */
              d2u_putwc(0x0a, ipOutF, ipFlag);
            }
          }
        }
        break;
      default: /* unknown FromToMode */
      ;
#if DEBUG
      fprintf(stderr, "%s: ", progname);
      fprintf(stderr, _("program error, invalid conversion mode %d\n"),ipFlag->FromToMode);
      exit(1);
#endif
    }
    return RetVal;
}
#endif

/* converts stream ipInF to UNIX format text and write to stream ipOutF
 * RetVal: 0  if success
 *         -1  otherwise
 */
int ConvertDosToUnix(FILE* ipInF, FILE* ipOutF, CFlag *ipFlag, char *progname)
{
    int RetVal = 0;
    int TempChar;
    int TempNextChar;
    int *ConvTable;
    int line_nr = 1;

    ipFlag->status = 0;

    switch (ipFlag->ConvMode)
    {
      case CONVMODE_ASCII: /* ascii */
        ConvTable = D2UAsciiTable;
        break;
      case CONVMODE_7BIT: /* 7bit */
        ConvTable = D2U7BitTable;
        break;
      case CONVMODE_437: /* iso */
        ConvTable = D2UIso437Table;
        break;
      case CONVMODE_850: /* iso */
        ConvTable = D2UIso850Table;
        break;
      case CONVMODE_860: /* iso */
        ConvTable = D2UIso860Table;
        break;
      case CONVMODE_863: /* iso */
        ConvTable = D2UIso863Table;
        break;
      case CONVMODE_865: /* iso */
        ConvTable = D2UIso865Table;
        break;
      case CONVMODE_1252: /* iso */
        ConvTable = D2UIso1252Table;
        break;
      default: /* unknown convmode */
        ipFlag->status |= WRONG_CODEPAGE ;
        return(-1);
    }
    if ((ipFlag->ConvMode > 1) && (!ipFlag->Quiet)) /* not ascii or 7bit */
    {
       fprintf(stderr, "%s: ", progname);
       fprintf(stderr, _("using code page %d.\n"), ipFlag->ConvMode);
    }

    /* CR-LF -> LF */
    /* LF    -> LF, in case the input file is a Unix text file */
    /* CR    -> CR, in dos2unix mode (don't modify Mac file) */
    /* CR    -> LF, in Mac mode */
    /* \x0a = Newline/Line Feed (LF) */
    /* \x0d = Carriage Return (CR) */

    switch (ipFlag->FromToMode)
    {
      case FROMTO_DOS2UNIX: /* dos2unix */
        while ((TempChar = fgetc(ipInF)) != EOF) {  /* get character */
          if ((ipFlag->Force == 0) &&
              (TempChar < 32) &&
              (TempChar != '\x0a') &&  /* Not an LF */
              (TempChar != '\x0d') &&  /* Not a CR */
              (TempChar != '\x09') &&  /* Not a TAB */
              (TempChar != '\x0c')) {  /* Not a form feed */
            RetVal = -1;
            ipFlag->status |= BINARY_FILE ;
            if (!ipFlag->Quiet)
            {
              fprintf(stderr, "%s: ", progname);
              fprintf(stderr, _("Binary symbol found at line %d\n"), line_nr);
            }
            break;
          }
          if (TempChar != '\x0d') {
            if (TempChar == '\x0a') /* Count all DOS and Unix line breaks */
              ++line_nr;
            if (fputc(ConvTable[TempChar], ipOutF) == EOF) {
              RetVal = -1;
              if (!ipFlag->Quiet)
              {
                fprintf(stderr, "%s: ", progname);
                fprintf(stderr, "%s", _("can not write to output file\n"));
              }
              break;
            }
          } else {
            StripDelimiter( ipInF, ipOutF, ipFlag, TempChar );
          }
        }
        break;
      case FROMTO_MAC2UNIX: /* mac2unix */
        while ((TempChar = fgetc(ipInF)) != EOF) {
          if ((ipFlag->Force == 0) &&
              (TempChar < 32) &&
              (TempChar != '\x0a') &&  /* Not an LF */
              (TempChar != '\x0d') &&  /* Not a CR */
              (TempChar != '\x09') &&  /* Not a TAB */
              (TempChar != '\x0c')) {  /* Not a form feed */
            RetVal = -1;
            ipFlag->status |= BINARY_FILE ;
            if (!ipFlag->Quiet)
            {
              fprintf(stderr, "%s: ", progname);
              fprintf(stderr, _("Binary symbol found at line %d\n"), line_nr);
            }
            break;
          }
          if ((TempChar != '\x0d'))
            {
              if (TempChar == '\x0a') /* Count all DOS and Unix line breaks */
                ++line_nr;
              if(fputc(ConvTable[TempChar], ipOutF) == EOF){
                RetVal = -1;
                if (!ipFlag->Quiet)
                {
                  fprintf(stderr, "%s: ", progname);
                  fprintf(stderr, "%s", _("can not write to output file\n"));
                }
                break;
              }
            }
          else{
            /* TempChar is a CR */
            if ( (TempNextChar = fgetc(ipInF)) != EOF) {
              ungetc( TempNextChar, ipInF );  /* put back peek char */
              /* Don't touch this delimiter if it's a CR,LF pair. */
              if ( TempNextChar == '\x0a' ) {
                fputc('\x0d', ipOutF); /* put CR, part of DOS CR-LF */
                continue;
              }
            }
            if (fputc('\x0a', ipOutF) == EOF) /* MAC line end (CR). Put LF */
              {
                RetVal = -1;
                if (!ipFlag->Quiet)
                {
                  fprintf(stderr, "%s: ", progname);
                  fprintf(stderr, "%s", _("can not write to output file\n"));
                }
                break;
              }
            line_nr++; /* Count all Mac line breaks */
            if (ipFlag->NewLine) {  /* add additional LF? */
              fputc('\x0a', ipOutF);
            }
          }
        }
        break;
      default: /* unknown FromToMode */
      ;
#if DEBUG
      fprintf(stderr, "%s: ", progname);
      fprintf(stderr, _("program error, invalid conversion mode %d\n"),ipFlag->FromToMode);
      exit(1);
#endif
    }
    return RetVal;
}

/* convert file ipInFN to UNIX format text and write to file ipOutFN
 * RetVal: 0 if success
 *         -1 otherwise
 */
int ConvertDosToUnixNewFile(char *ipInFN, char *ipOutFN, CFlag *ipFlag, char *progname)
{
  int RetVal = 0;
  FILE *InF = NULL;
  FILE *TempF = NULL;
  char *TempPath;
  char *errstr;
  struct stat StatBuf;
  struct utimbuf UTimeBuf;
#ifndef NO_CHMOD
  mode_t mask;
#endif
#ifdef NO_MKSTEMP
  FILE* fd;
#else
  int fd;
#endif
  char *TargetFN = NULL;
  int ResolveSymlinkResult = 0;

  ipFlag->status = 0 ;

  /* Test if output file is a symbolic link */
  if (symbolic_link(ipOutFN) && !ipFlag->Follow)
  {
    ipFlag->status |= OUTPUTFILE_SYMLINK ;
    /* Not a failure, skipping input file according spec. (keep symbolic link unchanged) */
    return -1;
  }

  /* Test if input file is a regular file or symbolic link */
  if (regfile(ipInFN, 1, ipFlag, progname))
  {
    ipFlag->status |= NO_REGFILE ;
    /* Not a failure, skipping non-regular input file according spec. */
    return -1;
  }

  /* Test if input file target is a regular file */
  if (symbolic_link(ipInFN) && regfile_target(ipInFN, ipFlag,progname))
  {
    ipFlag->status |= INPUT_TARGET_NO_REGFILE ;
    /* Not a failure, skipping non-regular input file according spec. */
    return -1;
  }

  /* Test if output file target is a regular file */
  if (symbolic_link(ipOutFN) && (ipFlag->Follow == SYMLINK_FOLLOW) && regfile_target(ipOutFN, ipFlag,progname))
  {
    ipFlag->status |= OUTPUT_TARGET_NO_REGFILE ;
    /* Failure, input is regular, cannot produce output. */
    if (!ipFlag->error) ipFlag->error = 1;
    return -1;
  }

  /* retrieve ipInFN file date stamp */
  if (stat(ipInFN, &StatBuf))
  {
    if (!ipFlag->Quiet)
    {
      ipFlag->error = errno;
      errstr = strerror(errno);
      fprintf(stderr, "%s: %s: %s\n", progname, ipInFN, errstr);
    }
    RetVal = -1;
  }

#ifdef NO_MKSTEMP
  if((fd = MakeTempFileFrom(ipOutFN, &TempPath))==NULL) {
#else
  if((fd = MakeTempFileFrom (ipOutFN, &TempPath)) < 0) {
#endif
    if (!ipFlag->Quiet)
    {
      ipFlag->error = errno;
      errstr = strerror(errno);
      fprintf(stderr, "%s: ", progname);
      fprintf(stderr, _("Failed to open temporary output file: %s\n"), errstr);
    }
    RetVal = -1;
  }

#if DEBUG
  fprintf(stderr, "%s: ", progname);
  fprintf(stderr, _("using %s as temporary file\n"), TempPath);
#endif

  /* can open in file? */
  if (!RetVal)
  {
    InF=OpenInFile(ipInFN);
    if (InF == NULL)
    {
      ipFlag->error = errno;
      errstr = strerror(errno);
      fprintf(stderr, "%s: %s: %s\n", progname, ipInFN, errstr);
      RetVal = -1;
    }
  }

  /* can open output file? */
  if ((!RetVal) && (InF))
  {
#ifdef NO_MKSTEMP
    if ((TempF=fd) == NULL)
    {
#else
    if ((TempF=OpenOutFile(fd)) == NULL)
    {
      ipFlag->error = errno;
      errstr = strerror(errno);
      fprintf(stderr, "%s: %s\n", progname, errstr);
#endif
      fclose (InF);
      InF = NULL;
      RetVal = -1;
    }
  }

  InF = read_bom(InF, &ipFlag->bomtype);

#ifdef D2U_UNICODE
#if !defined(__MSDOS__) && !defined(__WIN32__) && !defined(__OS2__)  /* Unix, Cygwin */
  if ((ipFlag->bomtype == FILE_UTF16LE) || (ipFlag->bomtype == FILE_UTF16BE))
  {
    if (strcmp(nl_langinfo(CODESET), "UTF-8") != 0)
    {
      /* Don't convert UTF-16 files when the locale encoding is not UTF-8
       * to prevent loss of characters. */
      ipFlag->status |= LOCALE_NOT_UTF8 ;
      if (!ipFlag->error) ipFlag->error = 1;
      RetVal = -1;
    }
  }
#endif
#if !defined(__WIN32__) && !defined(__CYGWIN__) /* Not Windows or Cygwin */
  if ((ipFlag->bomtype == FILE_UTF16LE) || (ipFlag->bomtype == FILE_UTF16BE))
  {
    if (sizeof(wchar_t) < 4)
    {
      /* A decoded UTF-16 surrogate pair must fit in a wchar_t */
      ipFlag->status |= WCHAR_T_TOO_SMALL ;
      if (!ipFlag->error) ipFlag->error = 1;
      RetVal = -1;
    }
  }
#endif
#endif

  if (ipFlag->add_bom)
    fprintf(TempF, "%s", "\xEF\xBB\xBF");  /* UTF-8 BOM */

  /* Turn off ISO and 7-bit conversion for Unicode text files */
  if (ipFlag->bomtype > 0)
    ipFlag->ConvMode = CONVMODE_ASCII;

  /* conversion sucessful? */
#ifdef D2U_UNICODE
  if ((ipFlag->bomtype == FILE_UTF16LE) || (ipFlag->bomtype == FILE_UTF16BE))
  {
    if ((!RetVal) && (ConvertDosToUnixW(InF, TempF, ipFlag, progname)))
      RetVal = -1;
    if (ipFlag->status & UNICODE_CONVERSION_ERROR)
    {
      if (!ipFlag->error) ipFlag->error = 1;
      RetVal = -1;
    }
  } else {
    if ((!RetVal) && (ConvertDosToUnix(InF, TempF, ipFlag, progname)))
      RetVal = -1;
  }
#else
  if ((!RetVal) && (ConvertDosToUnix(InF, TempF, ipFlag, progname)))
    RetVal = -1;
#endif

   /* can close in file? */
  if ((InF) && (fclose(InF) == EOF))
    RetVal = -1;

  /* can close output file? */
  if ((TempF) && (fclose(TempF) == EOF))
    RetVal = -1;

#ifdef NO_MKSTEMP
  if(fd!=NULL)
    fclose(fd);
#else
  if(fd>=0)
    close(fd);
#endif

#ifndef NO_CHMOD
  if (!RetVal)
  {
    if (ipFlag->NewFile == 0) /* old file mode */
    {
       RetVal = chmod (TempPath, StatBuf.st_mode); /* set original permissions */
    }
    else
    {
       mask = umask(0); /* get process's umask */
       umask(mask); /* set umask back to original */
       RetVal = chmod(TempPath, StatBuf.st_mode & ~mask); /* set original permissions, minus umask */
    }

    if (RetVal)
    {
       if (!ipFlag->Quiet)
       {
         ipFlag->error = errno;
         errstr = strerror(errno);
         fprintf(stderr, "%s: ", progname);
         fprintf(stderr, _("Failed to change the permissions of temporary output file %s: %s\n"), TempPath, errstr);
       }
    }
  }
#endif

#ifndef NO_CHOWN
  if (!RetVal && (ipFlag->NewFile == 0))  /* old file mode */
  {
     /* Change owner and group of the the tempory output file to the original file's uid and gid. */
     /* Required when a different user (e.g. root) has write permission on the original file. */
     /* Make sure that the original owner can still access the file. */
     if (chown(TempPath, StatBuf.st_uid, StatBuf.st_gid))
     {
        if (!ipFlag->Quiet)
        {
          ipFlag->error = errno;
          errstr = strerror(errno);
          fprintf(stderr, "%s: ", progname);
          fprintf(stderr, _("Failed to change the owner and group of temporary output file %s: %s\n"), TempPath, errstr);
        }
        RetVal = -1;
     }
  }
#endif

  if ((!RetVal) && (ipFlag->KeepDate))
  {
    UTimeBuf.actime = StatBuf.st_atime;
    UTimeBuf.modtime = StatBuf.st_mtime;
    /* can change output file time to in file time? */
    if (utime(TempPath, &UTimeBuf) == -1)
    {
      if (!ipFlag->Quiet)
      {
        ipFlag->error = errno;
        errstr = strerror(errno);
        fprintf(stderr, "%s: %s: %s\n", progname, TempPath, errstr);
      }
      RetVal = -1;
    }
  }

  /* any error? cleanup the temp file */
  if (RetVal && (TempPath != NULL))
  {
    if (unlink(TempPath) && (errno != ENOENT))
    {
      if (!ipFlag->Quiet)
      {
        ipFlag->error = errno;
        errstr = strerror(errno);
        fprintf(stderr, "%s: %s: %s\n", progname, TempPath, errstr);
      }
      RetVal = -1;
    }
  }

  /* If output file is a symbolic link, optional resolve the link and modify  */
  /* the target, instead of removing the link and creating a new regular file */
  TargetFN = ipOutFN;
  if (symbolic_link(ipOutFN) && !RetVal)
  {
    ResolveSymlinkResult = 0; /* indicates that TargetFN need not be freed */
    if (ipFlag->Follow == SYMLINK_FOLLOW)
    {
      ResolveSymlinkResult = ResolveSymbolicLink(ipOutFN, &TargetFN, ipFlag, progname);
      if (ResolveSymlinkResult < 0)
      {
        if (!ipFlag->Quiet)
        {
          fprintf(stderr, "%s: ", progname);
          fprintf(stderr, _("problems resolving symbolic link '%s'\n"), ipOutFN);
          fprintf(stderr, _("          output file remains in '%s'\n"), TempPath);
        }
        RetVal = -1;
      }
    }
  }

  /* can rename temporary file to output file? */
  if (!RetVal)
  {
#ifdef NEED_REMOVE
    if (unlink(TargetFN) && (errno != ENOENT))
    {
      if (!ipFlag->Quiet)
      {
        ipFlag->error = errno;
        errstr = strerror(errno);
        fprintf(stderr, "%s: %s: %s\n", progname, TargetFN, errstr);
      }
      RetVal = -1;
    }
#endif
    if (rename(TempPath, TargetFN) == -1)
    {
      if (!ipFlag->Quiet)
      {
        ipFlag->error = errno;
        errstr = strerror(errno);
        fprintf(stderr, "%s: ", progname);
        fprintf(stderr, _("problems renaming '%s' to '%s': %s\n"), TempPath, TargetFN, errstr);
#ifdef S_ISLNK
        if (ResolveSymlinkResult > 0)
          fprintf(stderr, _("          which is the target of symbolic link '%s'\n"), ipOutFN);
#endif
        fprintf(stderr, _("          output file remains in '%s'\n"), TempPath);
      }
      RetVal = -1;
    }

    if (ResolveSymlinkResult > 0)
      free(TargetFN);
  }
  free(TempPath);
  return RetVal;
}

/* convert stdin to UNIX format text and write to stdout
 * RetVal: 0 if success
 *         -1 otherwise
 */
int ConvertDosToUnixStdio(CFlag *ipFlag, char *progname)
{
    ipFlag->NewFile = 1;
    ipFlag->Quiet = 1;
    ipFlag->KeepDate = 0;
    ipFlag->Force = 1;

#if defined(__WIN32__) && !defined(__CYGWIN__)

    /* stdin and stdout are by default text streams. We need
     * to set them to binary mode. Otherwise an LF will
     * automatically be converted to CR-LF on DOS/Windows.
     * Erwin */

    /* 'setmode' was deprecated by MicroSoft
     * since Visual C++ 2005. Use '_setmode' instead. */

    _setmode(fileno(stdout), O_BINARY);
    _setmode(fileno(stdin), O_BINARY);
#elif defined(__MSDOS__) || defined(__CYGWIN__) || defined(__OS2__)
    setmode(fileno(stdout), O_BINARY);
    setmode(fileno(stdin), O_BINARY);
#endif

    read_bom(stdin, &ipFlag->bomtype);

    if (ipFlag->add_bom)
       fprintf(stdout, "%s", "\xEF\xBB\xBF");  /* UTF-8 BOM */

#ifdef D2U_UNICODE
    if ((ipFlag->bomtype == FILE_UTF16LE) || (ipFlag->bomtype == FILE_UTF16BE))
    {
       return (ConvertDosToUnixW(stdin, stdout, ipFlag, progname));
    } else {
       return (ConvertDosToUnix(stdin, stdout, ipFlag, progname));
    }
#else
    return (ConvertDosToUnix(stdin, stdout, ipFlag, progname));
#endif
}


int main (int argc, char *argv[])
{
  /* variable declarations */
  char progname[9];
  int ArgIdx;
  int CanSwitchFileMode;
  int ShouldExit;
  int RetVal = 0;
  int process_options = 1;
  CFlag *pFlag;
  char *ptr;
#ifdef ENABLE_NLS
  char localedir[1024];
#endif
# ifdef __MINGW64__
  int _dowildcard = -1; /* enable wildcard expansion for Win64 */
# endif

  progname[8] = '\0';
  strcpy(progname,"dos2unix");

#ifdef ENABLE_NLS
   ptr = getenv("DOS2UNIX_LOCALEDIR");
   if (ptr == NULL)
      strcpy(localedir,LOCALEDIR);
   else
   {
      if (strlen(ptr) < sizeof(localedir))
         strcpy(localedir,ptr);
      else
      {
         fprintf(stderr,"%s: ",progname);
         fprintf(stderr, "%s", _("error: Value of environment variable DOS2UNIX_LOCALEDIR is too long.\n"));
         strcpy(localedir,LOCALEDIR);
      }
   }
#endif

#if defined(ENABLE_NLS) || (defined(D2U_UNICODE) && !defined(__MSDOS__) && !defined(__WIN32__) && !defined(__OS2__))
/* setlocale() is also needed for nl_langinfo() */
   setlocale (LC_ALL, "");
#endif

#ifdef ENABLE_NLS
   bindtextdomain (PACKAGE, localedir);
   textdomain (PACKAGE);
#endif


  /* variable initialisations */
  ArgIdx = 0;
  CanSwitchFileMode = 1;
  ShouldExit = 0;
  pFlag = (CFlag*)malloc(sizeof(CFlag));
  pFlag->NewFile = 0;
  pFlag->Quiet = 0;
  pFlag->KeepDate = 0;
  pFlag->ConvMode = CONVMODE_ASCII;  /* default ascii */
  pFlag->FromToMode = FROMTO_DOS2UNIX;  /* default dos2unix */
  pFlag->NewLine = 0;
  pFlag->Force = 0;
  pFlag->Follow = SYMLINK_SKIP;
  pFlag->status = 0;
  pFlag->stdio_mode = 1;
  pFlag->error = 0;
#ifdef D2U_UNICODE
  pFlag->bomtype = FILE_MBS;
#endif
  pFlag->add_bom = 0;

  if ( ((ptr=strrchr(argv[0],'/')) == NULL) && ((ptr=strrchr(argv[0],'\\')) == NULL) )
    ptr = argv[0];
  else
    ptr++;

  if ((strcmpi("mac2unix", ptr) == 0) || (strcmpi("mac2unix.exe", ptr) == 0))
  {
    pFlag->FromToMode = FROMTO_MAC2UNIX;
    strcpy(progname,"mac2unix");
  }

  while ((++ArgIdx < argc) && (!ShouldExit))
  {
    /* is it an option? */
    if ((argv[ArgIdx][0] == '-') && process_options)
    {
      /* an option */
      if (strcmp(argv[ArgIdx],"--") == 0)
        process_options = 0;
      else if ((strcmp(argv[ArgIdx],"-h") == 0) || (strcmp(argv[ArgIdx],"--help") == 0))
      {
        PrintUsage(progname);
        return(pFlag->error);
      }
      else if ((strcmp(argv[ArgIdx],"-k") == 0) || (strcmp(argv[ArgIdx],"--keepdate") == 0))
        pFlag->KeepDate = 1;
      else if ((strcmp(argv[ArgIdx],"-f") == 0) || (strcmp(argv[ArgIdx],"--force") == 0))
        pFlag->Force = 1;
      else if ((strcmp(argv[ArgIdx],"-s") == 0) || (strcmp(argv[ArgIdx],"--safe") == 0))
        pFlag->Force = 0;
      else if ((strcmp(argv[ArgIdx],"-q") == 0) || (strcmp(argv[ArgIdx],"--quiet") == 0))
        pFlag->Quiet = 1;
      else if ((strcmp(argv[ArgIdx],"-l") == 0) || (strcmp(argv[ArgIdx],"--newline") == 0))
        pFlag->NewLine = 1;
      else if ((strcmp(argv[ArgIdx],"-m") == 0) || (strcmp(argv[ArgIdx],"--add-bom") == 0))
        pFlag->add_bom = 1;
      else if ((strcmp(argv[ArgIdx],"-S") == 0) || (strcmp(argv[ArgIdx],"--skip-symlink") == 0))
        pFlag->Follow = SYMLINK_SKIP;
      else if ((strcmp(argv[ArgIdx],"-F") == 0) || (strcmp(argv[ArgIdx],"--follow-symlink") == 0))
        pFlag->Follow = SYMLINK_FOLLOW;
      else if ((strcmp(argv[ArgIdx],"-R") == 0) || (strcmp(argv[ArgIdx],"--replace-symlink") == 0))
        pFlag->Follow = SYMLINK_REPLACE;
      else if ((strcmp(argv[ArgIdx],"-V") == 0) || (strcmp(argv[ArgIdx],"--version") == 0))
      {
        PrintVersion(progname);
#ifdef ENABLE_NLS
        PrintLocaledir(localedir);
#endif
        return(pFlag->error);
      }
      else if ((strcmp(argv[ArgIdx],"-L") == 0) || (strcmp(argv[ArgIdx],"--license") == 0))
      {
        PrintLicense();
        return(pFlag->error);
      }
      else if (strcmp(argv[ArgIdx],"-ascii") == 0)  /* SunOS compatible options */
        pFlag->ConvMode = CONVMODE_ASCII;
      else if (strcmp(argv[ArgIdx],"-7") == 0)
        pFlag->ConvMode = CONVMODE_7BIT;
      else if (strcmp(argv[ArgIdx],"-iso") == 0)
      {
        pFlag->ConvMode = (int)query_con_codepage();
        if (!pFlag->Quiet)
        {
           fprintf(stderr,"%s: ",progname);
           fprintf(stderr,_("active code page: %d\n"), pFlag->ConvMode);
        }
        if (pFlag->ConvMode < 2)
           pFlag->ConvMode = CONVMODE_437;
      }
      else if (strcmp(argv[ArgIdx],"-437") == 0)
        pFlag->ConvMode = CONVMODE_437;
      else if (strcmp(argv[ArgIdx],"-850") == 0)
        pFlag->ConvMode = CONVMODE_850;
      else if (strcmp(argv[ArgIdx],"-860") == 0)
        pFlag->ConvMode = CONVMODE_860;
      else if (strcmp(argv[ArgIdx],"-863") == 0)
        pFlag->ConvMode = CONVMODE_863;
      else if (strcmp(argv[ArgIdx],"-865") == 0)
        pFlag->ConvMode = CONVMODE_865;
      else if (strcmp(argv[ArgIdx],"-1252") == 0)
        pFlag->ConvMode = CONVMODE_1252;
      else if ((strcmp(argv[ArgIdx],"-c") == 0) || (strcmp(argv[ArgIdx],"--convmode") == 0))
      {
        if (++ArgIdx < argc)
        {
          if (strcmpi(argv[ArgIdx],"ascii") == 0)  /* Benjamin Lin's legacy options */
            pFlag->ConvMode = CONVMODE_ASCII;
          else if (strcmpi(argv[ArgIdx], "7bit") == 0)
            pFlag->ConvMode = CONVMODE_7BIT;
          else if (strcmpi(argv[ArgIdx], "iso") == 0)
          {
            pFlag->ConvMode = (int)query_con_codepage();
            if (!pFlag->Quiet)
            {
               fprintf(stderr,"%s: ",progname);
               fprintf(stderr,_("active code page: %d\n"), pFlag->ConvMode);
            }
            if (pFlag->ConvMode < 2)
               pFlag->ConvMode = CONVMODE_437;
          }
          else if (strcmpi(argv[ArgIdx], "mac") == 0)
            pFlag->FromToMode = FROMTO_MAC2UNIX;
          else
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("invalid %s conversion mode specified\n"),argv[ArgIdx]);
            pFlag->error = 1;
            ShouldExit = 1;
            pFlag->stdio_mode = 0;
          }
        }
        else
        {
          ArgIdx--;
          fprintf(stderr,"%s: ",progname);
          fprintf(stderr,_("option '%s' requires an argument\n"),argv[ArgIdx]);
          pFlag->error = 1;
          ShouldExit = 1;
          pFlag->stdio_mode = 0;
        }
      }

      else if ((strcmp(argv[ArgIdx],"-o") == 0) || (strcmp(argv[ArgIdx],"--oldfile") == 0))
      {
        /* last convert not paired */
        if (!CanSwitchFileMode)
        {
          fprintf(stderr,"%s: ",progname);
          fprintf(stderr, _("target of file %s not specified in new file mode\n"), argv[ArgIdx-1]);
          pFlag->error = 1;
          ShouldExit = 1;
          pFlag->stdio_mode = 0;
        }
        pFlag->NewFile = 0;
      }

      else if ((strcmp(argv[ArgIdx],"-n") == 0) || (strcmp(argv[ArgIdx],"--newfile") == 0))
      {
        /* last convert not paired */
        if (!CanSwitchFileMode)
        {
          fprintf(stderr,"%s: ",progname);
          fprintf(stderr, _("target of file %s not specified in new file mode\n"), argv[ArgIdx-1]);
          pFlag->error = 1;
          ShouldExit = 1;
          pFlag->stdio_mode = 0;
        }
        pFlag->NewFile = 1;
      }
      else { /* wrong option */
        PrintUsage(progname);
        ShouldExit = 1;
        pFlag->error = 1;
        pFlag->stdio_mode = 0;
      }
    }
    else
    {
      pFlag->stdio_mode = 0;
      /* not an option */
      if (pFlag->NewFile)
      {
        if (CanSwitchFileMode)
          CanSwitchFileMode = 0;
        else
        {
          RetVal = ConvertDosToUnixNewFile(argv[ArgIdx-1], argv[ArgIdx], pFlag, progname);
          if (pFlag->status & NO_REGFILE)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("Skipping %s, not a regular file.\n"), argv[ArgIdx-1]);
            }
          } else if (pFlag->status & OUTPUTFILE_SYMLINK)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("Skipping %s, output file %s is a symbolic link.\n"), argv[ArgIdx-1], argv[ArgIdx]);
            }
          } else if (pFlag->status & INPUT_TARGET_NO_REGFILE)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("Skipping symbolic link %s, target is not a regular file.\n"), argv[ArgIdx-1]);
            }
          } else if (pFlag->status & OUTPUT_TARGET_NO_REGFILE)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("Skipping %s, target of symbolic link %s is not a regular file.\n"), argv[ArgIdx-1], argv[ArgIdx]);
            }
          } else if (pFlag->status & BINARY_FILE)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("Skipping binary file %s\n"), argv[ArgIdx-1]);
            }
          } else if (pFlag->status & WRONG_CODEPAGE)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("code page %d is not supported.\n"), pFlag->ConvMode);
            }
          } else if (pFlag->status & LOCALE_NOT_UTF8)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("Skipping UTF-16 file %s, the current locale character encoding is not UTF-8.\n"), argv[ArgIdx-1]);
            }
          } else if (pFlag->status & WCHAR_T_TOO_SMALL)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("Skipping UTF-16 file %s, the size of wchar_t is %d bytes.\n"), argv[ArgIdx-1], (int)sizeof(wchar_t));
            }
          } else if (pFlag->status & UNICODE_CONVERSION_ERROR)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("Skipping UTF-16 file %s, an UTF-16 conversion error occurred.\n"), argv[ArgIdx-1]);
            }
          } else {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("converting file %s to file %s in Unix format ...\n"), argv[ArgIdx-1], argv[ArgIdx]);
            }
            if (RetVal)
            {
              if (!pFlag->Quiet)
              {
                fprintf(stderr,"%s: ",progname);
                fprintf(stderr, _("problems converting file %s to file %s\n"), argv[ArgIdx-1], argv[ArgIdx]);
              }
            }
          }
          CanSwitchFileMode = 1;
        }
      }
      else
      {
        RetVal = ConvertDosToUnixNewFile(argv[ArgIdx], argv[ArgIdx], pFlag, progname);
        if (pFlag->status & NO_REGFILE)
        {
          if (!pFlag->Quiet)
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("Skipping %s, not a regular file.\n"), argv[ArgIdx]);
          }
        } else if (pFlag->status & OUTPUTFILE_SYMLINK)
        {
          if (!pFlag->Quiet)
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("Skipping symbolic link %s.\n"), argv[ArgIdx]);
          }
        } else if (pFlag->status & INPUT_TARGET_NO_REGFILE)
        {
          if (!pFlag->Quiet)
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("Skipping symbolic link %s, target is not a regular file.\n"), argv[ArgIdx]);
          }
        } else if (pFlag->status & BINARY_FILE)
        {
          if (!pFlag->Quiet)
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("Skipping binary file %s\n"), argv[ArgIdx]);
          }
        } else if (pFlag->status & WRONG_CODEPAGE)
        {
          if (!pFlag->Quiet)
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("code page %d is not supported.\n"), pFlag->ConvMode);
          }
        } else if (pFlag->status & LOCALE_NOT_UTF8)
        {
          if (!pFlag->Quiet)
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("Skipping UTF-16 file %s, the current locale character encoding is not UTF-8.\n"), argv[ArgIdx]);
          }
        } else if (pFlag->status & WCHAR_T_TOO_SMALL)
        {
          if (!pFlag->Quiet)
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("Skipping UTF-16 file %s, the size of wchar_t is %d bytes.\n"), argv[ArgIdx], (int)sizeof(wchar_t));
          }
        } else if (pFlag->status & UNICODE_CONVERSION_ERROR)
        {
          if (!pFlag->Quiet)
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("Skipping UTF-16 file %s, an UTF-16 conversion error occurred.\n"), argv[ArgIdx]);
          }
        } else {
          if (!pFlag->Quiet)
          {
            fprintf(stderr,"%s: ",progname);
            fprintf(stderr, _("converting file %s to Unix format ...\n"), argv[ArgIdx]);
          }
          if (RetVal)
          {
            if (!pFlag->Quiet)
            {
              fprintf(stderr,"%s: ",progname);
              fprintf(stderr, _("problems converting file %s\n"), argv[ArgIdx]);
            }
          }
        }
      }
    }
  }

  /* no file argument, use stdin and stdout */
  if (pFlag->stdio_mode)
  {
    exit(ConvertDosToUnixStdio(pFlag, progname));
  }


  if (!CanSwitchFileMode)
  {
    fprintf(stderr,"%s: ",progname);
    fprintf(stderr, _("target of file %s not specified in new file mode\n"), argv[ArgIdx-1]);
    pFlag->error = 1;
  }
  return (pFlag->error);
}