Message-ID:	<B0000083442@stargate.astr.lu.lv>
From:	"Andris Pavenis" <pavenis AT lanet DOT lv>
To:	djgpp-workers AT delorie DOT com
Date:	Thu, 15 Apr 1999 11:43:46 +0300
MIME-Version:	1.0
Subject:	Update to dtou.c
X-mailer:	Pegasus Mail for Win32 (v3.02b14)
Reply-To:	djgpp-workers AT delorie DOT com

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Hi!

There are some possible problems with current version of dtou.c:

	- if writting output file is impossible due to some problem (eg. not enough
         space on disk) we may lose original file that is not nice. Therefore a check
         of results of write() must be done.

       - I would like to have the same utility also on other systems (usefull for poeple
         who are using cross-compilers to build DJGPP apps). There are some
         but it would be nice to be able to run the same shell scripts written for
         DJGPP. Therefore source should be cleaned from DOS only stuff.

Below is updated version of dtou.c where this is done. I tested it with 
DJGPP (of course), in Linux and on RS6000 (AIX-4.3.1). The same changes 
should be done also for utod.c  and may be some other utils which I didn't touch 
yet.

Andris



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     File:  DTOU.C
     Date:  15 Apr 1999, 11:39
     Size:  1529 bytes.
     Type:  Text

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/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <utime.h>

#ifndef O_BINARY
#define O_BINARY 0
#endif

static int
dtou(char *fname)
{
  int i, k, k2, sf, df, l, l2=0, err=0;
  char buf[16384];
  char tfname[FILENAME_MAX], *bn, *w;
  struct stat st;
  struct utimbuf tim1;
  sf = open(fname, O_RDONLY|O_BINARY);
  if (sf < 1)
  {
    perror(fname);
    return 1;
  }
  
  fstat (sf,&st);
  tim1.actime = st.st_atime;
  tim1.modtime = st.st_mtime;

  strcpy (tfname, fname);
  for (bn=w=tfname; *w; w++) 
    if (*w=='/' || *w=='\\') 
      bn = w+1;  
  if (bn) *bn=0;
  strcat (tfname,"utod.tm$");
  
  df = open(tfname, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644);
  if (df < 1)
  {
    perror(tfname);
    close(sf);
    return 1;
  }

  k2=0;
  while ((l=read(sf, buf, 16384)) > 0)
  { 
    for (i=k=0; i<l; i++) 
      if (buf[i]!=13)
        buf[k++]=buf[i];
    l2=write(df, buf, k);
    if (l2<0) break;
    if (l2!=k) { err=1; break; }
  }

  if (l<0) perror (fname);
  if (l2<0) perror (tfname);
  if (err) fprintf (stderr,"Cannot process file %s\n",fname);

  close(sf);
  close(df);

  if (l>=0 && l2>=0 && err==0)
  {
    remove(fname);
    rename(tfname, fname);
    utime(fname, &tim1);
  }
  else 
  {
    remove(tfname);
  }
  return 0;
}

int
main(int argc, char **argv)
{
  int rv = 0;
  for (argc--, argv++; argc; argc--, argv++)
    rv += dtou(*argv);
  return rv;
}

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