How can a process change an environment variable in its caller? []

Unix Programming FAQ How can I read the whole environment? []

Unix Programming FAQ Environment variables []

Unix Programming FAQ How can I get/set an environment variable from a program? []

On the Use of Environment Variables? [2001/07/01]

Questions and Answers

env(1) - set and print environment {oss}

printenv(1) - print out the environment {oss}

penv-1.2.b2 - Set the environment accoring to the current working directory

Envy - Shell-independent environment variable management {Artistic}

Applications and Utilities

getenv putenv setenv unsetenv (3) - environment variable functions {oss}

Env - On nearly all operating systems, every process runs in some environment. Your path (a.k.a. $PATH) and home directory, for instance, are almost always variables in that environment. You can access your environment (that is, you can find out the va

Cwd - Three functions for determining the current working directory. One is fast but flaky, one is slow and safe, one is juuust right. The Cwd module is bundled with Perl.

Libraries and Functions

(The following links to subjects at this site retain your personalized selections.)

The name of the currently running program is discussed at Running Process Information - Getting information on running processes.

See also Program Configuration Data

Up to Execution

See also: Local Process Communication - Communication between processes running on the same system. Synchronization. File locking. Signals. FIFOs, pipes, et al

See also: Process Creation and Control - covers child process control (like sending signals), renice, fork, et al