2024-03-16 02:55:33 +00:00
|
|
|
.\" generated by cd2nroff 0.1 from CURLOPT_UNIX_SOCKET_PATH.md
|
2024-06-01 20:49:19 +00:00
|
|
|
.TH CURLOPT_UNIX_SOCKET_PATH 3 "2024-06-01" libcurl
|
2024-03-16 02:55:33 +00:00
|
|
|
.SH NAME
|
|
|
|
CURLOPT_UNIX_SOCKET_PATH \- Unix domain socket
|
|
|
|
.SH SYNOPSIS
|
|
|
|
.nf
|
|
|
|
#include <curl/curl.h>
|
|
|
|
|
|
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_UNIX_SOCKET_PATH, char *path);
|
|
|
|
.fi
|
|
|
|
.SH DESCRIPTION
|
|
|
|
Enables the use of Unix domain sockets as connection endpoint and sets the
|
|
|
|
path to \fIpath\fP. If \fIpath\fP is NULL, then Unix domain sockets are
|
|
|
|
disabled.
|
|
|
|
|
|
|
|
When enabled, curl connects to the Unix domain socket instead of establishing
|
|
|
|
a TCP connection to the host. Since no network connection is created, curl
|
|
|
|
does not resolve the DNS hostname in the URL.
|
|
|
|
|
|
|
|
The maximum path length on Cygwin, Linux and Solaris is 107. On other platforms
|
|
|
|
it might be even less.
|
|
|
|
|
|
|
|
Proxy and TCP options such as \fICURLOPT_TCP_NODELAY(3)\fP are not
|
|
|
|
supported. Proxy options such as \fICURLOPT_PROXY(3)\fP have no effect either
|
|
|
|
as these are TCP\-oriented, and asking a proxy server to connect to a certain
|
|
|
|
Unix domain socket is not possible.
|
|
|
|
|
|
|
|
The application does not have to keep the string around after setting this
|
|
|
|
option.
|
|
|
|
.SH DEFAULT
|
|
|
|
Default is NULL, meaning that no Unix domain sockets are used.
|
|
|
|
.SH PROTOCOLS
|
2024-03-30 18:28:04 +00:00
|
|
|
All
|
2024-03-16 02:55:33 +00:00
|
|
|
.SH EXAMPLE
|
|
|
|
.nf
|
|
|
|
int main(void)
|
|
|
|
{
|
|
|
|
CURL *curl = curl_easy_init();
|
|
|
|
if(curl) {
|
|
|
|
curl_easy_setopt(curl, CURLOPT_UNIX_SOCKET_PATH, "/tmp/httpd.sock");
|
|
|
|
curl_easy_setopt(curl, CURLOPT_URL, "http://localhost/");
|
|
|
|
|
|
|
|
curl_easy_perform(curl);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
.fi
|
|
|
|
|
|
|
|
If you are on Linux and somehow have a need for paths larger than 107 bytes,
|
|
|
|
you can use the proc filesystem to bypass the limitation:
|
|
|
|
|
|
|
|
.nf
|
|
|
|
int dirfd = open(long_directory_path_to_socket, O_DIRECTORY | O_RDONLY);
|
|
|
|
char path[108];
|
|
|
|
snprintf(path, sizeof(path), "/proc/self/fd/%d/httpd.sock", dirfd);
|
|
|
|
curl_easy_setopt(curl_handle, CURLOPT_UNIX_SOCKET_PATH, path);
|
|
|
|
/* Be sure to keep dirfd valid until you discard the handle */
|
|
|
|
.fi
|
|
|
|
.SH AVAILABILITY
|
|
|
|
Added in 7.40.0.
|
|
|
|
.SH RETURN VALUE
|
|
|
|
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
|
|
|
|
.SH SEE ALSO
|
|
|
|
.BR CURLOPT_ABSTRACT_UNIX_SOCKET (3),
|
|
|
|
.BR CURLOPT_OPENSOCKETFUNCTION (3),
|
|
|
|
.BR unix (7)
|