Provided by: libcurl4-doc_8.12.1-2ubuntu1_all 
NAME
CURLOPT_NETRC - enable use of .netrc
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NETRC, long level);
DESCRIPTION
This parameter controls the preference level of libcurl between using usernames and passwords from your
~/.netrc file, relative to usernames and passwords in the URL supplied with CURLOPT_URL(3).
On Windows, libcurl primarily checks for .netrc in %HOME%. If %HOME% is not set on Windows, libcurl falls
back to %USERPROFILE%. If the file does not exist, it falls back to check if there is instead a file
named _netrc - using an underscore instead of period.
You can also tell libcurl a different filename to use with CURLOPT_NETRC_FILE(3).
libcurl uses a username (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, username 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 user.
level is a long that should be set to one of the values described below.
CURL_NETRC_IGNORED (0)
libcurl ignores the .netrc file. This is the default.
CURL_NETRC_OPTIONAL (1)
The use of the .netrc file is optional, and information in the URL is to be preferred. The file is
scanned for the host and username (to find the password only) or for the host only, to find the
first username and password after that machine, which ever information is not specified.
CURL_NETRC_REQUIRED (2)
The use of the .netrc file is required, and any credential information present in the URL is
ignored. The file is scanned for the host and username (to find the password only) or for the host
only, to find the first username and password after that machine, which ever information is not
specified.
FILE FORMAT
The .netrc file format is simple: you specify lines with a machine name and follow the login and password
that are associated with that machine.
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 ", n, r, and t. Quoted strings are the only way a space character can be used in a
username or password.
machine <name>
Provides credentials for a host called name. libcurl searches the .netrc file for a machine token
that matches the hostname 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.
default
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
login <name>
The username string for the remote machine.
password <secret>
Supply a password. If this token is present, curl supplies 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.
macdef <name>
Define a macro. This feature is not supported by libcurl. In order for the rest of the .netrc to
still work fine, libcurl properly skips every definition done with "macdef" that it finds.
DEFAULT
CURL_NETRC_IGNORED
PROTOCOLS
This functionality affects all supported protocols
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode ret;
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/");
curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
ret = curl_easy_perform(curl);
}
}
AVAILABILITY
Added in curl 7.1
RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).
SEE ALSO
CURLOPT_NETRC_FILE(3), CURLOPT_USERNAME(3), CURLOPT_USERPWD(3)