Environment Variables

You'll find a full description of each variable in the Perforce Command Reference.


Variable	Definition
`P4CHARSET`	For internationalized installations only, the character set to use for Unicode translations
`P4CLIENT`	Name of current client workspace
`P4CONFIG`	File name from which values for current environment variables are to be read
`P4DIFF`	The name and location of the diff program used by `p4 resolve` and `p4 diff`
`P4EDITOR`	The editor invoked by those Perforce commands that use forms
`P4HOST`	Name of host computer to impersonate. Only used if the `Host:` field of the current client workspace has been set in the `p4 client` form.
`P4JOURNAL`	A file that holds the database journal data, or `off` to disable journaling.
`P4LANGUAGE`	This variable is reserved for system integrators.
`P4LOG`	Name and path of the file to which Perforce server error and diagnostic messages are to be logged.
`P4MERGE`	A third-party merge program to be used by `p4 resolve`'s merge option
`P4PAGER`	The program used to page output from `p4 resolve`'s diff option
`P4PASSWD`	Stores the user's password as set in the `p4 user` form
`P4PORT`	For the Perforce server, the port number to listen on; for the `p4 client`, the name and port number of the Perforce server with which to communicate
`PWD`	The directory used to resolve relative filename arguments to `p4` commands
`P4ROOT`	Directory in which `p4d` stores its files and subdirectories
`P4USER`	The user's Perforce username
`TMP`	The directory to which Perforce writes its temporary files

Setting and viewing environment variables


OS or Shell	Environment Variable Example
UNIX: `ksh`, `sh`, `bash`	`P4CLIENT=value ; export P4CLIENT`
UNIX: `csh`	`setenv P4CLIENT value`
VMS	`def/j P4CLIENT "value"`
Mac MPW	`set -e P4CLIENT value`
Windows	`p4 set P4CLIENT=value` (See the `p4 set` section of the Perforce Command Reference or run the command `p4 help set` to obtain more information about setting Perforce's registry variables in Windows). Windows administrators running Perforce as a service can set variables for use by a specific service with `p4 set -S` `svcname` `var=value`.

To view a list of the values of all Perforce variables, use p4 set without any arguments.

On UNIX, this displays the values of the associated environment variables. On NT, this displays either the MS-DOS environment variable (if set), or the value in the registry and whether it was defined with p4 set (for the current user) or p4 set -s (for the local machine).


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