Click above to get retro games delivered to your door ever month!

 _chmod()                Change Access Mode of File

 #include   <io.h>

 int        _chmod(filename,func[,attrib]);
 const char *filename;                   Name of existing file
 int        func;                        Operation to perform
 int        attrib;                      Attribute constant

    _chmod() can either retrieve or set the attributes of the file
    specified by 'filename'.  If 'func' is set to 0, _chmod() gets the
    current attributes.  If 'func' is set to 1, the attribute is set to
    'attrib', which can be one of the following constants:

                FA_RDONLY     Read only
                FA_HIDDEN     Hidden file
                FA_SYSTEM     System file

       Returns:     The file attribute word, if successful.  On failure,
                    -1 is returned and 'errno' (defined in <errno.h>) is
                    set to either ENOENT (file not found) or EACCES
                    (permission denied).

   Portability:     MS-DOS only.

   -------------------------------- Example ---------------------------------

    The following statements make the file "MYDATA.DAT" read only.

           #include <stdio.h>      /* for printf */
           #include <io.h>         /* for _chmod */
           #include <dos.h>        /* for io.h */
           #include <errno.h>      /* for errno and ENOENT */

           main()
           {
               if (_chmod("mydata.dat",1,FA_RDONLY) == -1) {
                   if (errno == ENOENT)
                       printf("couldn't find mydata.dat\n");
                   else
                       printf("couldn't set read-only attribute\n");
               }
               else
                  printf("mydata.dat set to read-only\n");
           }