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unix_socket: add support for abstract unix domain socket

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In addition to unix domain sockets, Linux also supports an
abstract namespace which is independent of the filesystem.

In order to support it, add new CURLOPT_ABSTRACT_UNIX_SOCKET
option which uses the same storage as CURLOPT_UNIX_SOCKET_PATH
internally, along with a flag to specify abstract socket.

On non-supporting platforms, the abstract address will be
interpreted as an empty string and fail gracefully.

Also add new --abstract-unix-socket tool parameter.

Signed-off-by: Isaac Boukris <iboukris@gmail.com>
Reported-by: Chungtsun Li (typeless)
Reviewed-by: Daniel Stenberg
Reviewed-by: Peter Wu
Closes #1197
Fixes #1061
This commit is contained in:
Isaac Boukris 2017-01-09 00:51:08 +02:00 • committed by Peter Wu
parent a7c73ae309
commit 1d786faee1
17 changed files with 139 additions and 19 deletions
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3
docs/cmdline-opts/Makefile.am
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@ -22,7 +22,8 @@
AUTOMAKE_OPTIONS = foreign no-dependencies
DPAGES = anyauth.d append.d basic.d cacert.d capath.d cert.d \
DPAGES = abstract-unix-socket.d anyauth.d \
append.d basic.d cacert.d capath.d cert.d \
cert-status.d cert-type.d ciphers.d compressed.d config.d \
connect-timeout.d connect-to.d continue-at.d cookie.d cookie-jar.d \
create-dirs.d crlf.d crlfile.d data-ascii.d data-binary.d data.d \

9
docs/cmdline-opts/abstract-unix-socket.d Normal file
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@ -0,0 +1,9 @@
Long: abstract-unix-socket
Arg: <path>
Help: Connect through an abstract Unix domain socket
Added: 7.53.0
Protocols: HTTP
---
Connect through an abstract Unix domain socket, instead of using the network.
Note: netstat shows the path of an abstract socket prefixed with '@', however
the <path> argument should not have this leading character.