#include <dos.h> unsigned int _dos_setfileattr(const char *filename, unsigned int attr);
This function sets the attributes of given file. Use the following constans in DOS.H to create attr parameter:
_A_NORMAL (0x00)
_A_RDONLY (0x01)
_A_HIDDEN (0x02)
_A_SYSTEM (0x04)
_A_VOLID (0x08)
_A_SUBDIR (0x10)
_A_ARCH (0x20)
See section _dos_getfileattr.
This function does not support long filenames, even on systems where the LFN API (see section _use_lfn) is available. For LFN-aware functions with similar functionality see section _chmod. Also see section chmod, which is Posix-standard.
Returns with 0 if successful and DOS error value on error (and sets errno to ENOENT or EACCES).
not ANSI, not POSIX
if ( !_dos_setfileattr("FOO.DAT", _A_RDONLY | _A_HIDDEN) ) puts("FOO.DAT is hidden now.");
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