It is possible that the internal handleMessage() might try to send to
a channel that has been closed. The result can be an AssertionError.
Guard against this.
Fixes: https://github.com/nodejs/node/issues/4205
PR-URL: https://github.com/nodejs/node/pull/5153
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
This commit prevents child process stdio streams from being
automatically flushed on child process exit/close if a 'readable'
event handler has been attached at the time of exit.
Without this, child process stdio data can be lost if the process
exits quickly and a `read()` (e.g. from a 'readable' handler)
hasn't had the chance to get called yet.
Fixes: https://github.com/nodejs/node/issues/5034
PR-URL: https://github.com/nodejs/node/pull/5037
Reviewed-By: James M Snell <jasnell@gmail.com>
spawnSync() modifies the options argument. This commit makes
a copy of options before any modifications occur.
PR-URL: https://github.com/joyent/node/pull/9159
Reviewed-By: trevnorris - Trevor Norris <trev.norris@gmail.com>
process.send() should be synchronous, it should block until the message
has been sent in full, but it wasn't after the second-to-last libuv
upgrade because of commit libuv/libuv@393c1c5 ("unix: set non-block
mode in uv_{pipe,tcp,udp}_open"), which made its way into io.js in
commit 07bd05b ("deps: update libuv to 1.2.1").
Commit libuv/libuv@b36d4ff ("unix: implement uv_stream_set_blocking()")
as landed in io.js in commit 9681fca ("deps: update libuv to 1.4.0")
makes it possible to restore the synchronous behavior again and that's
precisely what this commit does.
The same line of reasoning applies to `net.Socket({ fd: 1 })`: creating
a socket object from a stdio file descriptor, like the `process.stdout`
getter does, should put the file descriptor in blocking mode for
compatibility reasons.
Reviewed-By: Julien Gilli <julien.gilli@joyent.com>
PR-URL: https://github.com/joyent/node/pull/9179
Instead of simply creating a new v8::Object to contain the connection
information, instantiate a new instance of a FunctionTemplate. This will
allow future improvements for debugging and performance probes.
Additionally, the "provider" argument in the ReqWrap constructor is no
longer optional.
PR-URL: https://github.com/joyent/node/pull/8110
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
Reviewed-by: Fedor Indutny <fedor@indutny.com>
Reviewed-by: Alexis Campailla <alexis@janeasystems.com>
Reviewed-by: Julien Gilli <julien.gilli@joyent.com>
Optional fork args should be type-checked with same behaviour as the
equivalent argument to spawn.
PR-URL: https://github.com/joyent/node/pull/8454
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
execFile and spawn have same API signature with respect to optional arg
array and optional options object, they should have same behaviour with
respect to argument validation.
PR-URL: https://github.com/joyent/node/pull/8454
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Add stricter argument type checking to normalizeSpawnArguments().
Removes a number of extraneous checks in spawn().
Fix regression in handling of the optional args argument.
Add more thorough testing of spawn() arguments.
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Currently, a TypeError is incorrectly thrown if the second argument is
an object. This commit allows the args argument to be properly omitted.
Fixes: https://github.com/joyent/node/issues/6068
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Currently, checkExecSyncError() attempts to access the contents
of stderr. When stdio is set to 'ignore', this causes a crash.
This commit adds a check on the access of stderr. Closes#7966.
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Use a util.deprecate wrapper to issue warnings like any other
deprecated API. The option has been marked as deprecated in the docs
since v0.5.11.
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Currently child_process.exec() assumes that cmd.exe is on the PATH,
and fails with a spawn ENOENT error if it is not.
The Windows 'comspec' environment variable contains the full filepath
to the default command interpreter, eg "C:\Windows\System32\cmd.exe".
Should it not be set, we fall-back to using 'cmd.exe' from PATH, as
before.
Signed-off-by: Fedor Indutny <fedor@indutny.com>
EMFILE and ENFILE mean 'out of file descriptors'. It's a run-time error
and as such should emit an error on the child process object, not throw
an exception.
Fixes#7453.
Signed-off-by: Timothy J Fontaine <tjfontaine@gmail.com>
Ensure TypeError is thrown, fix a bug where `env` option was
assuming the option was actually an object.
This case is especially bad because it then sets `env == null`
instead of using `process.env`.
Fix#7456
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Fix possible deadlock, when handles are sent in both direction
simultaneously. In such rare cases, both sides may queue their
`NODE_HANDLE_ACK` replies and wait for them.
fix#7465
When sending a socket to a child process via IPC pipe,
`child_process.js` picks a raw UV handle from `_handle` property, sends
it, and assigns `null` to the property. Sending the same socket twice
was resulting in a runtime error, since we weren't handling the empty
`_handle` case.
In case of `null` `_handle` we should send just a plain text message
as passed it was passed to `.send()` and ignore the handle, letting
users handle such cases themselves instead of throwing the error at
runtime.
fix#5469
This implements the user-facing APIs that lets one run a child process
and block until it exits.
Logic shared with the async counterpart of each function was refactored
to enable code reuse.
Docs and tests are included.
Spawn's arguments were documented to be optional, as they are for the
other similar child_process APIs, but the code was missing. Result was
`child_process.spawn('node', {})` errored when calling slice() on an
Object, now it behaves as the documentation said it would.
1. Swallow errors when sending internal NODE_HANDLE_ACK messages, so
they don't crash the process.
2. Queue process.disconnect() if there are any pending queued messages.
Fixes test-child-process-fork-net2.js on win.
After the uv upgrade, uv_spawn will now fail faster for certain
failures like ENOENT. However, our tests and other people may be
depending on that error being passed to the callback instead of a
throw.
There's no need to create a new Buffer instance if we're just going to
immediately call toString() at the end anyway. Better to create a
string up front, and setEncoding() on the streams, and do a string
concatenation instead.
Libuv now returns errors directly. Make everything in src/ and lib/
follow suit.
The changes to lib/ are not strictly necessary but they remove the need
for the abominations that are process._errno and node::SetErrno().
Commit 9352c19 ("child_process: don't emit same handle twice") trades
one bug for another.
Before said commit, a handle was sometimes delivered with messages it
didn't belong to.
The bug fix introduced another bug that needs some explaining. On UNIX
systems, handles are basically file descriptors that are passed around
with the sendmsg() and recvmsg() system calls, using auxiliary data
(SCM_RIGHTS) as the transport.
node.js and libuv depend on the fact that none of the supported systems
ever emit more than one SCM_RIGHTS message from a recvmsg() syscall.
That assumption is something we should probably address someday for the
sake of portability but that's a separate discussion.
So, SCM_RIGHTS messages are never coalesced. SCM_RIGHTS and normal
messages however _are_ coalesced. That is, recvmsg() might return this:
recvmsg(); // { "message-with-fd", "message", "message" }
The operating system implicitly breaks pending messages along
SCM_RIGHTS boundaries. Most Unices break before such messages but Linux
also breaks _after_ them. When the sender looks like this:
sendmsg("message");
sendmsg("message-with-fd");
sendmsg("message");
Then on most Unices the receiver sees messages arriving like this:
recvmsg(); // { "message" }
recvmsg(); // { "message-with-fd", "message" }
The bug fix in commit 9352c19 assumes this behavior. On Linux however,
those messages can also come in like this:
recvmsg(); // { "message", "message-with-fd" }
recvmsg(); // { "message" }
In other words, it's incorrect to assume that the file descriptor is
always attached to the first message. This commit makes node wise up.
Fixes#5330.
Don't scan the whole string for a "NODE_" substring, just check that
the string starts with the expected prefix.
This is a reprise of dbbfbe7 but this time for the child_process
module.
