.TH ENV 3.SH NAMEenv \- environment device.SH SYNOPSIS.nf.B bind #e /env .BI /env/ name.fi.SH DESCRIPTIONThe environment device serves a one-level directory giving access to environment variablesand their values.It is conventionally bound to.BR /env .The value of an environment variable .I namemay be obtained by reading the file.BI /env/ name.If the file does not exist, the variable is unset and has the value nil. Themaximum length of a variable name is 127 bytes..PPNew environment variables are set by creating the corresponding filein.B /envand writing the required value to that file. Similarly environment variables are destroyed (unset) byremoving the corresponding file..PPProcesses sharing an `environment group' see the same files and contents;changes made by one process are seen by the others.A process can insulate itself from further changes using the.L FORKENVoption to.IR sys-pctl (2),which creates a new environment group that is a copy of the old,but further changes in each are independent.A new empty environment group is created by the.L NEWENVoption to.IR sys-pctl (2)..SH SOURCE.B /os/port/devenv.c.br.B /emu/port/devenv.c.SH SEE ALSO.IR env (1),.IR sh (1),.IR env (2),.IR sys-pctl (2)