How can I know which file identifiers correspond to open files?
72 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
MathWorks Support Team
il 13 Nov 2009
Modificato: Josh Kahn
il 9 Giu 2023
I have opened a file using FOPEN and processed it. A few lines of code later, there was an error, and the file wasn't closed properly.
I would like to know which file identifiers correspond to open files so I can close them using FCLOSE.
Risposta accettata
MathWorks Support Team
il 13 Nov 2009
To see the list of identifiers of all open files you can use the following command:
fids = fopen('all')
To see the file names which correspond to those file identifiers you can use the following command:
filenames = arrayfun(@fopen, fids, 'UniformOutput', 0)
Finally, if you just want to close all open files you can use the following command:
fclose('all')
0 Commenti
Più risposte (1)
Josh Kahn
il 9 Giu 2023
Modificato: Josh Kahn
il 9 Giu 2023
Also, if you want to avoid this, you can now use a cleanup object to close the file when the function is done (error or normal) similar to a try/catch.
For more information, see:
function myFunction
fid = fopen('myFile.txt', 'w')
cleanup = onCleanup(@() fclose(fid));
fprintf(fid, 'hello!');
end
equivalent to:
function myFunction
fid = fopen('myFile.txt', 'w')
try
fprintf(fid, 'hello!');
fclose(fid);
catch ME
fclose(fid);
rethrow(ME);
end
end
0 Commenti
Vedere anche
Categorie
Scopri di più su Low-Level File I/O in Help Center e File Exchange
Prodotti
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!