by Hi John Birchfield!
There is a very little chance, that this letter really will come to
you.
I downloaded from Internet a package called dos2unix.zip
I unzipped it and there was a unix2dos.com file.
I wanted to understand how it works, so I have looked in the
unix2dos.c version of the file.
I have run UNIX2dos.com as followes:
1. I have put unix2dos.com in my c:\util, which was in
my PATH statement in autoexec.bat
2. I copied in my work directory the source files from UNIX.
3. I typed unix2dos *.*
4. I saw messages coming "cleaning file..."
5. it did all the files O.K.
Then I wanted to see what is going on, so I have recompiled the
program using a Borland compiler.
i had to change the following:
#if MSDOS
# define link(x,y) rename (x, y)
# define R_CNTRL "rb"
# define W_CNTRL "wb"
#else
# define R_CNTRL "r"
# define W_CNTRL "w"
#endif
as:
#define MSDOS
#ifdef MSDOS
# define link(x,y) rename (x, y)
# define R_CNTRL "rb"
# define W_CNTRL "wb"
#else
# define R_CNTRL "r"
# define W_CNTRL "w"
#endif
because it would not link.
Anyway, i compiled it and put in a de* and try to run it.
It did *on fopen, because file path name was *.*.
When I did supplu good file name it worked fine.
Why your version (unix2dos.com) worked originally O.K. with *.*
wildcard?
I could not understand in the source, how it picks up all the file
name in the directory?
/*
* UNIX2DOS.C
*
* Convert lf's to crlf combinations in a file but keep it's original
* date/time stamp.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifndef TRUE
# define TRUE (1)
# define FALSE (0)
#endif
#if MSDOS
# define link(x,y) rename (x, y)
# define R_CNTRL "rb"
# define W_CNTRL "wb"
#else
# define R_CNTRL "r"
# define W_CNTRL "w"
#endif
struct stat s_buf;
main (argc, argv)
int argc;
char **argv;
{
char *path;
while (--argc>0)
{
if (stat (path=*++argv, &s_buf) != -1)
{
printf ("Unix2Dos: Cleaning file %s ...\n", path);
if (u2dos (path))
{
fprintf (stderr, "Unix2Dos: Problems cleaning file %s\n", path);
}
}
else
{
fprintf (stderr, "Unix2Dos: Can't stat '%s'\n", path);
}
}
intQuote:}
u2dos (path)
char *path;
{
FILE *in, *out;
int ch,
rval = FALSE;
char temppath [16];
struct utimbuf { time_t actime, modtime; } ut_buf;
strcpy (temppath, "./clntmp");
/* I also have changed here gsz
#if !defined (MSDOS)
strcat (temppath, "XXXXXX");
mktemp (temppath);
#endif
*/
#ifdef MSDOS
strcat (temppath, "XXXXXX");
mktemp (temppath);
#endif
if ((in=fopen (path, R_CNTRL)) == (FILE *) 0)
return TRUE;
if ((out=fopen (temppath, W_CNTRL)) == (FILE *) 0)
{
fclose (in);
return TRUE;
}
while ((ch = getc (in)) != EOF)
if (((ch == '\012') && (putc ('\015', out) == EOF)) ||
(putc (ch, out) == EOF) )
{
rval = TRUE;
break;
}
if (fclose (in) == EOF)
{
rval = TRUE;
}
if (fclose (out) == EOF)
{
rval = TRUE;
}
ut_buf.actime = s_buf.st_atime;
ut_buf.modtime = s_buf.st_mtime;
if (utime (temppath, &ut_buf) == -1)
rval = TRUE;
if (unlink (path) == -1)
rval = TRUE;
if (rval)
{
unlink (temppath);
return TRUE;
}
if (link (temppath,path) == -1)
{
fprintf (stderr, "Unix2Dos: Problems renaming '%s' to '%s'\n",
temppath, path);
fprintf (stderr, " However, file '%s' remains\n", temppath);
exit (1);
}
unlink (temppath);
return FALSE;
Quote:}