CURLOPT_ABSTRACT_UNIX_SOCKET(3) Library Functions Manual
NAME
CURLOPT_ABSTRACT_UNIX_SOCKET - abstract Unix domain socket
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ABSTRACT_UNIX_SOCKET,
char *path);
DESCRIPTION
Enables the use of an abstract Unix domain socket instead of establishing
a TCP connection to a host. The parameter should be a char * to a
null-terminated string holding the path of the socket. The path is set to
path prefixed by a null byte. This is the convention for abstract
sockets, however it should be stressed that the path passed to this
function should not contain a leading null byte.
On non-supporting platforms, the abstract address is interpreted as an
empty string and fails gracefully, generating a runtime error.
This option shares the same semantics as CURLOPT_UNIX_SOCKET_PATH(3) in
which documentation more details can be found. Internally, these two
options share the same storage and therefore only one of them can be set
per handle.
DEFAULT
NULL
PROTOCOLS
This functionality affects all supported protocols
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode result;
curl_easy_setopt(curl, CURLOPT_ABSTRACT_UNIX_SOCKET, "/tmp/foo.sock");
curl_easy_setopt(curl, CURLOPT_URL, "http://localhost/");
/* Perform the request */
result = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
AVAILABILITY
Added in curl 7.53.0
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_UNIX_SOCKET_PATH(3), unix(7)
libcurl 2026-10-18 CURLOPT_ABSTRACT_UNIX_SOCKET(3)
curl 8.23.0 - Generated Sun Oct 18 15:38:37 CDT 2026