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P4 CLI Reference | 2025.1

# P4_port_CHARSET

Specifies whether the server is in Unicode mode.

## Usage notes

Used by Client? | Used by Server? | Command-Line Alternative | Can be set in P4CONFIG file?
--- | --- | --- | ---
Yes | No | `-C` option | Yes

## Value if not explicitly set

Operating System | Value
--- | ---
All | None, which specifies that the server is not in Unicode mode.

## Notes

When a client connects to the server, it attempts to discover the server’s Unicode mode setting, and it sets the `P4_port_CHARSET` variable to specify that setting: for non-Unicode, the variable is set to `none`; for Unicode, the variable is set to `auto`. If `P4_port_CHARSET` is set to `auto`, the client sets the `P4CHARSET` to `auto`. The client then examines its own environment to determine what character set it needs to use in appropriately rendering unicode files from the server.

The port part of this environment variable specifies the host:port of the server to which the client is connected.

For more information about using servers in Unicode mode, see "Setting up and managing Unicode installations" in the P4 Server Administration Documentation.

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