Share;Fileop -- some file primitives for Macsyma users.

Macsyma now provides some useful simple file primitives which
were formerly only available in other system programs.

To print the contents of a file on your terminal, say
Printfile(file,name,dsk,me);

To list your directory, say Listfiles(dsk,me).  If you use a shared
directory such as Users or Plasma, only your files--the ones
with your login name as first file name--will be shown.
The length and date of creation of each file is also shown.

The function Filelength returns the length of the file argument
in blocks.

In order to list just the names of your files without the
length and date information, use Qlistfiles (Quick LIST Files)
with the same arguments as Listfiles.

The function Renamefile(oldname,newname) renames a file from oldname
to newname. - (kmp, 6/7/79)


Details.

The Printfile command takes the same argument syntax as Loadfile;
the other two take the syntax of Writefile.  Listfiles indicates
whether each file is stored on secondary disk and whether it
has been backed up to tape (an exclamation point appears if
it has not).

The Filelength command returns the length in blocks: there are five 
characters in a word and 1024 words in a disk block.

Files may not be renamed across directories or devices.  Both oldname
and newname must be on the same directory.  Renaming a file to a filename
that already exists gives an error.  You must explicitly Delfile the
existing file first if that's what you want.  Both oldname and newname
must be list-type filespecs. example: 
Renamefile([myold,file,dsk,foo],[mynew,file]);        - (kmp, 6/7/79)