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CURLOPT_NETRC(3) curl_easy_setopt options CURLOPT_NETRC(3)
CURLOPT_NETRC - enable use of .netrc
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NETRC, long level);
This parameter controls the preference level of libcurl between using
user names and passwords from your ~/.netrc file, relative to user
names and passwords in the URL supplied with CURLOPT_URL(3).
On Windows, libcurl will use the file as %HOME%/_netrc. If %HOME% is
not set on Windows, libcurl falls back to %USERPROFILE%.
You can also tell libcurl a different file name to use with
libcurl uses a user name (and supplied or prompted password) supplied
with CURLOPT_USERPWD(3) or CURLOPT_USERNAME(3) in preference to any of
the options controlled by this parameter.
Only machine name, user name and password are taken into account (init
macros and similar things are not supported).
libcurl does not verify that the file has the correct properties set
(as the standard Unix ftp client does). It should only be readable by
level is a long that should be set to one of the values described
The library will ignore the .netrc file. This is the default.
The use of the .netrc file is optional, and information in the
URL is to be preferred. The file will be scanned for the host
and user name (to find the password only) or for the host only,
to find the first user name and password after that machine,
which ever information is not specified.
The use of the .netrc file is required, and any credential
information present in the URL is ignored. The file will be
scanned for the host and user name (to find the password only)
or for the host only, to find the first user name and password
after that machine, which ever information is not specified.
The .netrc file format is simple: you specify lines with a machine name
and follow the login and password that are associated with that
Each field is provided as a sequence of letters that ends with a space
or newline. Starting in 7.84.0, libcurl also supports quoted strings.
They start and end with double quotes and support the escaped special
letters \ \r, and \t. Quoted strings are the only way a space character
can be used in a user name or password.
Provides credentials for a host called name. libcurl searches
the .netrc file for a machine token that matches the host name
specified in the URL. Once a match is made, the subsequent
tokens are processed, stopping when the end of file is reached
or another "machine" is encountered.
This is the same as "machine" name except that default matches
any name. There can be only one default token, and it must be
after all machine tokens. To provide a default anonymous login
for hosts that are not otherwise matched, add a line similar to
this in the end:
default login anonymous password user@domain
The user name string for the remote machine.
Supply a password. If this token is present, curl will supply
the specified string if the remote server requires a password as
part of the login process. Note that if this token is present
in the .netrc file you really should make sure the file is not
readable by anyone besides the user.
Define a macro. This feature is not supported by libcurl. In
order for the rest of the .netrc to still work fine, libcurl
will properly skip every definition done with "macdef" that it
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/");
curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
ret = curl_easy_perform(curl);
CURLOPT_USERPWD(3), CURLOPT_USERNAME(3), CURLOPT_NETRC_FILE(3),
libcurl 7.87.0 September 20, 2022 CURLOPT_NETRC(3)