| feof (fid) | Built-in Function |
| Return 1 if an end-of-file condition has been encountered for a given file and 0 otherwise. Note that it will only return 1 if the end of the file has already been encountered not if the next read operation will result in an end-of-file condition. |
| ferror (fid) | Built-in Function |
| Return 1 if an error condition has been encountered for a given file and 0 otherwise. Note that it will only return 1 if an error has already been encountered not if the next operation will result in an error condition. |
| freport () | Built-in Function |
Print a list of which files have been opened and whether they are open
for reading writing, or both. For example,
freport ()
-| number mode name
-|
-| 0 r stdin
-| 1 w stdout
-| 2 w stderr
-| 3 r myfile
|