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<!DOCTYPE html PUBLIC "-//IETF//DTD HTML 3.0//EN"><html><head><title>Help on Environment variables</title><LINK rev="made" href="mailto:lynx-dev@sig.net"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"></head><body><pre><em>ENVIRONMENT</em> In addition to various "standard" environment variables such as HOME, PATH, USER, DISPLAY, TMPDIR, etc, Lynx utilizes several Lynx-specific environment variables, <a href="#env">if they exist</a>. Others may be created or modified by Lynx to pass data to an external program, or for other reasons. These are listed separately <a href="#setenv">below</a>. See also the sections on <a href="#cgi">SIMULATED CGI SUPPORT</a> and <a href="#language">NATIVE LANGUAGE SUPPORT</a>, below. Note: Not all environment variables apply to all types of platforms supported by Lynx, though most do. Feedback on platform dependencies is solicited. See also <a href="#dos">win32/dos</a> specific variables.<a name="env"><em>Environment Variables Used By Lynx:</em></a> COLORTERM If set, color capability for the terminal is forced on at startup time. The actual value assigned to the variable is ignored. This variable is only meaningful if Lynx was built using the slang screen-handling library. LYNX_CFG This variable, if set, will override the default location and name of the global configuration file (normally, lynx.cfg) that was defined by the LYNX_CFG_FILE constant in the userdefs.h file, during installation. See the userdefs.h file for more information. LYNX_LOCALEDIR If set, this variable overrides the compiled-in location of the locale directory which contains native lan- guage (NLS) message text. LYNX_LSS This variable, if set, specifies the location of the default Lynx character style sheet file. [Currently only meaningful if Lynx was built using experimental color style support.] LYNX_SAVE_SPACE This variable, if set, will override the default path prefix for files saved to disk that is defined in the lynx.cfg SAVE_SPACE: statement. See the lynx.cfg file for more information. LYNX_TEMP_SPACE This variable, if set, will override the default path prefix for temporary files that was defined during installation, as well as any value that may be assigned to the TMPDIR variable. LYNX_TRACE If set, causes Lynx to write a trace file as if the -trace option were sup- plied. LYNX_TRACE_FILE If set, overrides the compiled-in name of the trace file, which is either Lynx.trace or LY-TRACE.LOG (the latter on the DOS platform). The trace file is in either case relative to the home directory. MAIL This variable specifies the default inbox Lynx will check for new mail, if such checking is enabled in the lynx.cfg file. NEWS_ORGANIZATION This variable, if set, provides the string used in the Organization: header of USENET news postings. It will override the setting of the ORGANIZATION environment variable, if it is also set (and, on UNIX, the contents of an /etc/organization file, if present). NNTPSERVER If set, this variable specifies the default NNTP server that will be used for USENET news reading and posting with Lynx, via news: URL's. ORGANIZATION This variable, if set, provides the string used in the Organization: header of USENET news postings. On UNIX, it will override the contents of an /etc/organization file, if present. PROTOCOL_proxy Lynx supports the use of proxy servers that can act as firewall gateways and caching servers. They are preferable to the older gateway servers (see WWW_access_GATEWAY, below). Each protocol used by Lynx (http, ftp, gopher, etc), can be mapped separately by setting environment variables of the form PROTOCOL_proxy (literally: http_proxy, ftp_proxy, gopher_proxy, etc), to "http://some.server.dom:port/". See <a href="#proxy">Proxy details and examples</a>. WWW_access_GATEWAY Lynx still supports use of gateway servers, with the servers specified via "WWW_access_GATEWAY" variables (where "access" is lower case and can be "http", "ftp", "gopher" or "wais"), however most gateway servers have been discontinued. Note that you do not include a terminal '/' for gateways, but do for proxies specified by PROTOCOL_proxy environment variables. See <a href="#proxy">Proxy details</a>. WWW_HOME This variable, if set, will override the default startup URL specified in any of the Lynx configuration files.<a name="setenv"><em>Environment Variables Set or Modified By Lynx:</em></a> LYNX_PRINT_DATE This variable is set by the Lynx p(rint) function, to the Date: string seen in the document's "Information about" page (= cmd), if any. It is created for use by an external program, as defined in a lynx.cfg PRINTER: definition statement. If the field does not exist for the document, the variable is set to a null string under UNIX, or "No Date" under VMS. LYNX_PRINT_LASTMOD This variable is set by the Lynx p(rint) function, to the Last Mod: string seen in the document's "Information about" page (= cmd), if any. It is created for use by an external program, as defined in a lynx.cfg PRINTER: definition statement. If the field does not exist for the document, the variable is set to a null string under UNIX, or "No LastMod" under VMS. LYNX_PRINT_TITLE This variable is set by the Lynx p(rint) function, to the Linkname: string seen in the document's "Information about" page (= cmd), if any. It is created for use by an external program, as defined in a lynx.cfg PRINTER: definition statement. If the field does not exist for the document, the variable is set to a null string under UNIX, or "No Title" under VMS. LYNX_PRINT_URL This variable is set by the Lynx p(rint) function, to the URL: string seen in the document's "Information about" page (= cmd), if any. It is created for use by an external program, as defined in a lynx.cfg PRINTER: definition statement. If the field does not exist for the document, the variable is set to a null string under UNIX, or "No URL" under VMS. LYNX_VERSION This variable is always set by Lynx, and may be used by an external program to determine if it was invoked by Lynx. See also the comments in the distribution's sample mailcap file, for notes on usage in such a file. SSL_CERT_DIR Set to the directory containing trusted certificates. SSL_CERT_FILE Set to the full path and filename for your file of trusted certificates. TERM Normally, this variable is used by Lynx to determine the terminal type being used to invoke Lynx. If, however, it is unset at startup time (or has the value "unknown"), or if the -term command-line option is used, Lynx will set or modify its value to the user specified terminal type (for the Lynx execution environment). Note: If set/modified by Lynx, the values of the LINES and/or COLUMNS environment variables may also be changed.<a name="cgi"><em>SIMULATED CGI SUPPORT</em></a> If built with the cgi-links option enabled, Lynx allows access to a cgi script directly without the need for an http daemon. When executing such "lynxcgi scripts" (if enabled), the following variables may be set for simulating a CGI environment:⌨️ 快捷键说明
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