unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (v7man)
Page:
Section:
Apropos / Subsearch:
optional field

ENVIRON(5)                    File Formats Manual                   ENVIRON(5)



NAME
       environ - user environment

SYNOPSIS
       extern char **environ;

DESCRIPTION
       An  array  of  strings  called  the  `environment' is made available by
       exec(2) when a process begins.  By convention these  strings  have  the
       form `name=value'.  The following names are used by various commands:

       PATH   The sequence of directory prefixes that sh, time, nice(1), etc.,
              apply in searching for a file known by an incomplete path  name.
              The    prefixes   are   separated   by   `:'.    Login(1)   sets
              PATH=:/bin:/usr/bin.

       HOME   A user's login directory, set by login(1) from the password file
              passwd(5).

       TERM   The  kind  of terminal for which output is to be prepared.  This
              information is used by commands, such as nroff or plot(1), which
              may  exploit  special  terminal capabilities.  See term(7) for a
              list of terminal types.

       Further names may be placed in the environment by  the  export  command
       and  `name=value'  arguments  in sh(1), or by exec(2).  It is unwise to
       conflict with certain Shell variables that are frequently  exported  by
       `.profile' files: MAIL, PS1, PS2, IFS.

SEE ALSO
       exec(2), sh(1), term(7), login(1)



                                                                    ENVIRON(5)