---
name: "dacs_prenv"
section: "8"
platform: "linux"
package: "dacs"
version: "1.4.40-2"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/dacs_prenv"
---

# dacs\_prenv(8)

CGI program that displays its environment

## NAME

dacs\_prenv - CGI program that displays its environment

## SYNOPSIS

**dacs\_prenv** \[**-html**\]

## DESCRIPTION

This program is part of the **DACS** suite. It is a stand-alone program that neither accepts the usual **DACS** command line options (*dacsoptions*) nor accesses any **DACS** configuration files.

This CGI utility simply prints its command line arguments, all environment variables, information about the system on which it is running, and CGI parameters and their values. It can be a useful tool when debugging web services.

**Tip**\

This program can be a useful tool for debugging web services. Replace a call to your web service with an identical call to **dacs\_prenv** to see what arguments your web service is being passed and (to some extent) other context.

## OPTIONS

**dacs\_prenv** recognizes these command line flags:

- **-html**

  Selects HTML output (text/html) instead of the default Content-Type of text/plain, by default, using the style sheet **dacs\_prenv.css**\[1\].

### Web Service Arguments

When used as a web service, the following parameters are recognized:

*FORMAT*

At present, the only recognized value for this argument is HTML.

*just\_dump\_stdin*

If the value of **QUERY\_STRING** is exactly jump\_dump\_stdin, then the program will simply copy its standard input to the standard output as text/plain.

## FILES

**dacs\_prenv.css**\[1\]

## DIAGNOSTICS

The program exits 0 if everything was fine, 1 if an error occurred.

## BUGS

It should be possible to request XML output.

## SEE ALSO

**[cgiparse(8)](/cgiparse/8.md)**\[2\], **[env(1)](/env/1.md)**\[3\], **[printenv(1)](/printenv/1.md)**\[4\], **[environ(7)](/environ/7.md)**\[5\]

## AUTHOR

Distributed Systems Software (**www.dss.ca**\[6\])

## COPYING

Copyright © 2003-2018 Distributed Systems Software. See the **LICENSE**\[7\] file that accompanies the distribution for licensing information.

## NOTES

- 1\.

  dacs\_prenv.css

  http://dacs.dss.ca/man//css/dacs\_prenv.css

- 2\.

  [cgiparse(8)](/cgiparse/8.md)

  http://dacs.dss.ca/man/cgiparse.8.html

- 3\.

  [env(1)](/env/1.md)

  https://www.freebsd.org/cgi/man.cgi?query=env&apropos=0&sektion=1&manpath=FreeBSD+10.3-RELEASE&format=html

- 4\.

  [printenv(1)](/printenv/1.md)

  https://www.freebsd.org/cgi/man.cgi?query=printenv&apropos=0&sektion=1&manpath=FreeBSD+10.3-RELEASE&format=html

- 5\.

  [environ(7)](/environ/7.md)

  https://www.freebsd.org/cgi/man.cgi?query=environ&apropos=0&sektion=7&manpath=FreeBSD+10.3-RELEASE&format=html

- 6\.

  www.dss.ca

  http://www.dss.ca

- 7\.

  LICENSE

  http://dacs.dss.ca/man/../misc/LICENSE