#1340 Support EFS for ZIP format

[Danny Lin]

By default, 7Z does not set EFS (Language encoding flag) when compressing a file to ZIP format on Windows except that the filename to be compressed contains a char not supported in the current code page. Since Windows do not use UTF-8 as code page, this causes the ZIP file not extracted correctly on other platform that uses UTF-8.

Could you make 7Z set EFS when generating a ZIP on Windows? Or at least add an option to let the user to turn if on when he attempts to make a ZIP file.

[Igor Pavlov]

just write

cu

in "Parameters" field.

[Danny Lin]

How can I set it when I drag a file to add it to a ZIP, or when I edit a file in a ZIP? And is there a way to view which file in the ZIP has EFS set in the GUI or CLI?

[Igor Pavlov]

1) Now cu is supported only with "Add to archive" operation only.
2) you can see "UTF8" flag in "Characterstics" column for file in latest 7-Zip 17.01 beta:

Characteristics: NTFS : UTF8

for command line:

7z l a.zip -slt

[Danny Lin]

Thanks. May I request adding the support of parameters when adding a file to or editing a file in the zip?

[Igor Pavlov]

no code and no window for that now.
maybe later I'll think about it.

[Danny Lin]

How about adding the parameter to the default options so that adding or editing a file in the ZIP uses it as the default compression method?

[Igor Pavlov]

It's not so simple to implement now.
Maybe later.