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GNU Octave

13.2.18 End of File and Errors

Built-in Function: feof (fid)

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.

Built-in Function: ferror (fid)

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.

Built-in Function: freport ()

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