Add -safe mode to shell which disables external access, and remove SQLite UDFs from the shell
#14509
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…external_access to false
Mytherin
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Dec 1, 2024
See #14509, but as a dot command: ```sql .safe_mode ATTACH 'external_db.db'; -- Permission Error: -- Cannot access file "external_db.db" - file system operations are disabled by configuration ``` This is useful because it allows us to do some initial setup (if desired) before enabling safe mode: ```sql ATTACH 'permitted_db.db'; .safe_mode -- we cannot attach new databases, but we can access permitted_db ```
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This PR adds the
-safeparameter to the shell. When the CLI is launched with this parameter, the CLI is prevented from accessing external files other than the database file that it was initially connected to and prevented from interacting with the host file system. This has the following effects:.cd,.excel,.log,.import,.open,.output,.once,.read,.shand.systemare disabledgetenvis disabledenable_external_accessis set tofalse, which in turn disables commands likeATTACHof an on-disk file,COPY ...to read to/write from filesSQLite UDFs
In a continuous effort to clean-up the shell this PR also removes support for several (undocumented) SQLite UDFs that were provided only in the shell:
edit,writefile,readfile,lsmodeandsha3