You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
4.4 KiB
91 lines
4.4 KiB
.\" **************************************************************************
|
|
.\" * _ _ ____ _
|
|
.\" * Project ___| | | | _ \| |
|
|
.\" * / __| | | | |_) | |
|
|
.\" * | (__| |_| | _ <| |___
|
|
.\" * \___|\___/|_| \_\_____|
|
|
.\" *
|
|
.\" * Copyright (C) 2018 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
.\" *
|
|
.\" * This software is licensed as described in the file COPYING, which
|
|
.\" * you should have received as part of this distribution. The terms
|
|
.\" * are also available at https://curl.haxx.se/docs/copyright.html.
|
|
.\" *
|
|
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
.\" * copies of the Software, and permit persons to whom the Software is
|
|
.\" * furnished to do so, under the terms of the COPYING file.
|
|
.\" *
|
|
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
.\" * KIND, either express or implied.
|
|
.\" *
|
|
.\" **************************************************************************
|
|
.TH libcurl-env 3 "September 16, 2020" "libcurl 7.73.0" "libcurl environment variables"
|
|
|
|
.SH NAME
|
|
libcurl-env \- environment variables libcurl understands
|
|
.SH DESCRIPTION
|
|
libcurl reads and understands a set of environment variables that if set will
|
|
control and change behaviors. This is the full list of variables to set and
|
|
description of what they do. Also note that curl, the command line tool,
|
|
supports a set of additional environment variables independently of this.
|
|
.IP "[scheme]_proxy"
|
|
When libcurl is given a URL to use in a transfer, it first extracts the
|
|
"scheme" part from the URL and checks if there is a given proxy set for that
|
|
in its corresponding environment variable. A URL like "https://example.com"
|
|
will hence use the "http_proxy" variable, while a URL like "ftp://example.com"
|
|
will use the "ftp_proxy" variable.
|
|
|
|
These proxy variables are also checked for in their uppercase versions, except
|
|
the "http_proxy" one which is only used lowercase. Note also that some systems
|
|
actually have a case insensitive handling of environment variables and then of
|
|
course "HTTP_PROXY" will still work...
|
|
.IP ALL_PROXY
|
|
This is a setting to set proxy for all URLs, independently of what scheme is
|
|
being used. Note that the scheme specific variables will override this one if
|
|
set.
|
|
.IP CURL_SSL_BACKEND
|
|
When libcurl is built to support multiple SSL backends, it will select a
|
|
specific backend at first use. If no selection is done by the program using
|
|
libcurl, this variable's selection will be used. It should be set to the full
|
|
SSL backend name to use (case insensitive).
|
|
.IP HOME
|
|
When the netrc feature is used (\fICURLOPT_NETRC(3)\fP), this variable is
|
|
checked as the primary way to find the "current" home directory in which
|
|
the .netrc file is likely to exist.
|
|
.IP LOGNAME
|
|
User name to use when invoking the ntlm-wb tool, if NTLMUSER wasn't set.
|
|
.IP NO_PROXY
|
|
This has the same functionality as the \fICURLOPT_NOPROXY(3)\fP option: it
|
|
gives libcurl a comma-separated list of host name patterns for which libcurl
|
|
should not use a proxy.
|
|
.IP NTLMUSER
|
|
User name to use when invoking the ntlm-wb tool.
|
|
.IP SSLKEYLOGFILE
|
|
When set and libcurl runs with a SSL backend that supports this feature,
|
|
libcurl will save SSL secrets into the given file name. Using those SSL
|
|
secrets, other tools (such as Wireshark) can decrypt the SSL communication and
|
|
analyze/view the traffic.
|
|
.IP SSL_DIR
|
|
When libcurl runs with the NSS backends for TLS features, this variable is
|
|
used to find the directory for NSS PKI database instead of the built-in.
|
|
.IP USER
|
|
User name to use when invoking the ntlm-wb tool, if NTLMUSER and LOGNAME
|
|
weren't set.
|
|
.SH "Debug Variables"
|
|
There's a set of variables only recognized and used if libcurl was built
|
|
"debug enabled", which should never be true for a library used in production.
|
|
.IP "CURL_GETHOSTNAME"
|
|
Debug-only variable.
|
|
.IP "CURL_FORCETIME"
|
|
Debug-only variable.
|
|
.IP "CURL_ENTROPY"
|
|
Debug-only variable. Used to set a fixed faked value to use instead of a
|
|
proper random number so that functions in libcurl that are otherwise getting
|
|
random outputs can be tested for what they generate.
|
|
.IP "CURL_TRACE"
|
|
Debug-only variable. Used for debugging the lib/ldap implementation.
|
|
.IP "CURL_NTLM_WB_FILE"
|
|
Debug-only variable. Used to set to a debug-version of the ntlm-wb executable.
|
|
.IP "CURL_OPENLDAP_TRACE"
|
|
Debug-only variable. Used for debugging the lib/openldap.c implementation.
|