Hi,
I noticed that many files on my FreeDOS partition do not have a creation
time, or rather they claim to be created in 1980. For a long time I
thought that this is a bug, but today I looked at the kernel source code
and found out that file creation times are never actually set.
The file hdr\fat.h does define "dir_crtime" and "dir_crdate" in the
"dirent" structure, but a search didn't reveal them being used anywhere.
I compiled myself a new kernel with two simple changes to init_direntry in
kernel\fatfs.c:
STATIC void init_direntry(struct dirent *dentry, unsigned attrib,
CLUSTER cluster, char *name)
{
dentry->dir_size = 0l;
memset(dentry, 0, sizeof(struct dirent));
memcpy(dentry->dir_name, name, FNAME_SIZE + FEXT_SIZE);
#ifdef WITHFAT32
dentry->dir_start_high = (UWORD)(cluster >> 16);
#endif
dentry->dir_start = (UWORD)cluster;
dentry->dir_attrib = (UBYTE)attrib;
dentry->dir_crtime = // add this
dentry->dir_time = dos_gettime();
dentry->dir_crdate = // and this
dentry->dir_date = dos_getdate();
}
And now when I create files in FreeDOS, Windows shows the correct creation
times. I don't know whether any DOS program actually displays them, but
they are an important thing to me...
This message
http://www.mail-archive.com/freedos-user%40lists.sourceforge.net/msg01105.html
and this Wikipedia article
https://en.wikipedia.org/w/index.php?title=Design_of_the_FAT_file_system&oldid=614948461#Directory_entry
both mention file creation times as something that was added to the FAT
design at the same time as long filenames. Does the FreeDOS kernel not
support them because of patent issues? I can hardly imagine a simple
feature like this being patented.
So is there any reason they're not supported or is this just an oversight?
Matej Horvat
http://matejhorvat.si/
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