test: Added relative path to accommodate limit #12601

b6t · 2017-04-22T20:28:48Z

Found that libuv had a path character limit of 108. Used path.relative() to set prefix with relative path.

Checklist

make -j4 test (UNIX), or vcbuild test (Windows) passes
tests and/or benchmarks are included
commit message follows commit guidelines

Affected core subsystem(s)

Found that libuv had a path character limit of 108. Used path.relative() to set prefix with relative path.

Trott

LGTM if CI is green. Thanks for fixing this!

Trott · 2017-04-22T20:33:24Z

CI: https://ci.nodejs.org/job/node-test-pull-request/7598/

mscdex · 2017-04-22T21:19:51Z

I think there should be a comment above the change the describes why a relative path is being used (including libuv error and platform (if error is specific to say Windows filesystems or something)).

Trott · 2017-04-23T02:26:52Z

test/parallel/test-net-connect-options-fd.js

@@ -32,7 +33,8 @@ const forAllClients = (cb) => common.mustCall(cb, CLIENT_VARIANTS);

 // Test Pipe fd is wrapped correctly
 {
-  const prefix = `${common.PIPE}-net-connect-options-fd`;
+  const prefix = path.relative(`${common.PIPE}-net-connect-options-fd`,
+                               `${__dirname}-net-connect-options-fd`);


I think this should be this instead:

const prefix = path.relative('.', `${common.PIPE}-net-connect-options-fd`);

Simpler, and I think it will fix the problems we're seeing on CI.

Trott

I think it needs a tweak in the path.relative() call. See comment.

addaleax · 2017-04-27T15:33:31Z

ping @coreybeaumont … do you think you could address @Trott’s comment?

b6t · 2017-04-27T16:13:55Z

Apologies @Trott I missed that note. I'll take of this today.

Improved the call to path.relative(). Also added comments explaining the use of a relative path.

b6t · 2017-04-27T18:42:40Z

@Trott added b1f370b

jasnell · 2017-04-27T18:45:05Z

test/parallel/test-net-connect-options-fd.js

-  const prefix = path.relative(`${common.PIPE}-net-connect-options-fd`,
-                               `${__dirname}-net-connect-options-fd`);
+  // Using relative path on osx if the path is greaterthan 108 chars
+  // an AssertionError: -48 is thrown


nit: might be worthwhile adding a comment that explains what -48 means.

@jasnell That unfortunately I don't know. I believe @addaleax does?

I believe -48 is the libuv error for UV_EADDRINUSE. In any event, it's a libuv error.

I don't think this is OS X specific. It will happen on anything (or at least anything POSIX?) with a long enough path. I think you can just remove the comment (no one's going to wonder "why aren't they using an absolute path here??!!") or use a comment like this:

// Use relative path to avoid hitting 128-char length limit for socket paths in libuv.

/cc @addaleax to make sure I got that right (that it's 128 chars, that it's in libuv, etc.).

@Trott 108 should be the right number on Linux and almost certainly other systems too¹², quote unix(7):

struct sockaddr_un { sa_family_t sun_family; /* AF_UNIX */ char sun_path[108]; /* pathname */ };

It’s this bit of code in libuv that truncates the path to that size. The actual value for EADDRINUSE is OS-dependent; for example, for me on Linux it’s 98 (which libuv forwards as -98).

See also #12708, I think that’s the same kind of problem.

¹ edit: yeah, your guess of “anything POSIX” sounds right, Windows doesn’t have UNIX sockets. ;)

² more edits: https://nodejs.org/api/net.html#net_server_listen_path_backlog_callback has numbers, it’s somewhere between 92 and 108.

Trott

LGTM if CI is green.

Trott · 2017-04-27T22:17:46Z

CI: https://ci.nodejs.org/job/node-test-pull-request/7720/

Altered to comment to better reflect the use of a relative path.

Fail with ENAMETOOLONG when the name of a Unix socket exceeds `sizeof(saddr.sun_path)`. Previously the path was just truncated, which could result in nasty bugs, and even though that behaviour has been always been around, it’s hard to imagine a situation in which ending up with an incorrect path is better than not creating a socket at all. Ref: nodejs/node#12601 Ref: nodejs/node#12708

Found that libuv had a path character limit of 108. Used path.relative() to set prefix with relative path. Also added comments explaining the use of a relative path. PR-URL: nodejs#12601 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>

Trott · 2017-04-28T21:40:38Z

Landed in 0101a8f.
Thanks for the contribution! 🎉

Fail with ENAMETOOLONG when the name of a Unix socket exceeds `sizeof(saddr.sun_path)`. Previously the path was just truncated, which could result in nasty bugs, and even though that behaviour has been always been around, it’s hard to imagine a situation in which ending up with an incorrect path is better than not creating a socket at all. Refs: nodejs/node#12601 Refs: nodejs/node#12708 PR-URL: #1329 Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>

gibfahn · 2017-06-18T22:43:32Z

Should land with #11847 if that is backported.

test: Added relative path to accommodate limit

f7a42ed

Found that libuv had a path character limit of 108. Used path.relative() to set prefix with relative path.

nodejs-github-bot added the test Issues and PRs related to the tests. label Apr 22, 2017

Trott added the code-and-learn Issues related to the Code-and-Learn events and PRs submitted during the events. label Apr 22, 2017

addaleax approved these changes Apr 22, 2017

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Trott approved these changes Apr 22, 2017

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cjihrig approved these changes Apr 22, 2017

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mscdex added the net Issues and PRs related to the net subsystem. label Apr 22, 2017

Trott reviewed Apr 23, 2017

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Trott requested changes Apr 23, 2017

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test: improved call to path.relative()

b1f370b

Improved the call to path.relative(). Also added comments explaining the use of a relative path.

jasnell reviewed Apr 27, 2017

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Trott approved these changes Apr 27, 2017

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test: improved comments

d97a6d8

Altered to comment to better reflect the use of a relative path.

jasnell approved these changes Apr 27, 2017

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addaleax mentioned this pull request Apr 27, 2017

unix: fail with ENAMETOOLONG in uv_pipe_* libuv/libuv#1329

Closed

gibfahn approved these changes Apr 28, 2017

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Trott closed this Apr 28, 2017

jasnell mentioned this pull request May 11, 2017

8.0.0 Release Proposal #12220

Closed

This was referenced Jun 15, 2017

Auditing for 6.11.1 nodejs/Release#230

Closed

test: test various calling patterns of net.connect() related functions #11847

Closed

gibfahn added the backport-requested-v6.x label Jun 18, 2017

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test: Added relative path to accommodate limit #12601

test: Added relative path to accommodate limit #12601

b6t commented Apr 22, 2017

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test: Added relative path to accommodate limit #12601

test: Added relative path to accommodate limit #12601

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b6t commented Apr 22, 2017

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Affected core subsystem(s)

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