OS X has a tiny 1kb hard-coded buffer size for stdout / stderr to
TTYs (terminals). Output larger than that causes chunking, which ends
up having some (very small but existent) delay past the first chunk.
That causes two problems:
1. When output is written to stdout and stderr at similar times, the
two can become mixed together (interleaved). This is especially
problematic when using control characters, such as \r. With
interleaving, chunked output will often have lines or characters erased
unintentionally, or in the wrong spots, leading to broken output.
CLI apps often extensively use such characters for things such as
progress bars.
2. Output can be lost if the process is exited before chunked writes
are finished flushing. This usually happens in applications that use
`process.exit()`, which isn't infrequent.
See https://github.com/nodejs/node/issues/6980 for more info.
This became an issue as result of the Libuv 1.9.0 upgrade. A fix to
an unrelated issue broke a hack previously required for the OS X
implementation. This resulted in an unexpected behavior change in node.
The 1.9.0 upgrade was done in c3cec1eefc,
which was included in v6.0.0.
Full details of the Libuv issue that induced this are at
https://github.com/nodejs/node/issues/6456#issuecomment-219974514
Refs: https://github.com/nodejs/node/pull/1771
Refs: https://github.com/nodejs/node/issues/6456
Refs: https://github.com/nodejs/node/pull/6773
Refs: https://github.com/nodejs/node/pull/6816
PR-URL: https://github.com/nodejs/node/pull/6895
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Adds more explicit documentation for the single optional parameter
to process.hrtime to the process docs.
PR-URL: https://github.com/nodejs/node/pull/6585
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Robert Jefe Lindstaedt <robert.lindstaedt@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Most of the information is gleaned from changelogs. The rest is inferred
from git history.
Omitted cpuUsage() since it's not yet in a release.
Also omitted the streams, events and signals, since I didn't really
think it made sense for those.
Ref: https://github.com/nodejs/node/issues/6578
PR-URL: https://github.com/nodejs/node/pull/6589
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: Alexander Makarenko <estliberitas@gmail.com>
The fact that process.exit() interrupts pending async operations
such as non-blocking i/o is becoming a bit more pronounced with
the recent libuv update. This commit expands the documentation
for `process.exit()` to explain clearly how it affects async
operations.
PR-URL: https://github.com/nodejs/node/pull/6410
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Robert Lindstaedt <robert.lindstaedt@gmail.com>
Add process.cpuUsage() method that returns the user and system
CPU time usage of the current process
PR-URL: https://github.com/nodejs/node/pull/6157
Reviewed-By: Robert Lindstaedt <robert.lindstaedt@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/6350
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Minwoo Jung <jmwsoft@gmail.com>
Sort links in lexical order. Add missing links.
Add `disconnect` event description in Process doc.
Fix typos.
R-URL: https://github.com/nodejs/node/pull/5075
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Robert Jefe Lindstädt <robert.lindstaedt@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
* doc: rename .markdown references in content
* doc: rename to .md in tools
* doc: rename to .md in CONTRIBUTING.md
PR-URL: https://github.com/nodejs/node/pull/4747
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: techjeffharris
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
In several places throughout the code we write directly to stderr
to report warnings (deprecation, possible eventemitter memory leak).
The current design of simply dumping the text to stderr is less
than ideal. This PR introduces a new "process warnings" mechanism
that emits 'warning' events on the global process object. These are
invoked with a `warning` argument whose value is an Error object.
By default, these warnings will be printed to stderr. This can be
suppressed using the `--no-warnings` and `--no-deprecation` command
line flags. For warnings, the 'warning' event will still be emitted
by the process, allowing applications to handle the warnings in custom
ways. The existing `--no-deprecation` flag will continue to supress
all deprecation output generated by the core lib.
The `--trace-warnings` command line flag will tell Node.js to print
the full stack trace of warnings as part of the default handling.
The existing `--no-deprecation`, `--throw-deprecation` and
`--trace-deprecation` flags continue to work as they currently do,
but the exact output of the warning message is modified to occur
on process.nextTick().
The stack trace for the warnings and deprecations preserve and point
to the correct call site.
A new `process.emitWarning()` API is provided to permit userland
to emit warnings and deprecations using the same consistent
mechanism.
Test cases and documentation are included.
PR-URL: https://github.com/nodejs/node/pull/4782
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Wyatt Preul <wpreul@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Rework the doc a bit to tighten it up, including removing the
use of `you`
Fix some line wrapping issues.
PR-URL: https://github.com/nodejs/node/pull/5287
Reviewed-By: Roman Klauke <romaaan.git@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
...
This commit adds an options object to process.send(). The same
object is propagated to process._send(), the _handleQueue, and the
send() and postSend() functions of the handle converter.
Fixes: https://github.com/nodejs/node/issues/4271
PR-URL: https://github.com/nodejs/node/pull/5283
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
This commit brings the process.send() signature into sync with
the child_process.send() documentation. Specifically, this commit
adds the callback argument and return type to the docs.
PR-URL: https://github.com/nodejs/node/pull/5284
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
process.env has a few quirks that deserve documenting.
The commit documents:
- How assigning to process.env will implicitly call `toString()`
- How to remove an environment variable from process.env
PR-URL: https://github.com/nodejs/node/pull/4924
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
This commit replaces multiple usages of `function(){}` with ES2015
arrow functions in places it was forgotten earlier. The goal is to
make the docs more consistent since other functions were already
replaced with ES2015 arrows.
In addition, it fixes invalid syntax in modules.markdown to valid
syntax as well as remove `var self = this` pattern usages in the code
where they are now possible to avoid through arrow functions.
PR-URL: https://github.com/nodejs/node/pull/4832
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/4797
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Chris Dickinson <chris@neversaw.us>
Reviewed-By: Roman Reiss <me@silverwind.io>
This changes the code blocks from 4-space indentation to ``` fences for
better syntax highlighting and future linting support. Minor On-the-fly
changes for typos and highlight breaking markdown have been made.
JSON-Style objects have been changed so their closing bracket is
on the same line as the opening one.
Known issues:
* Not every JSON / object notation has been improved. Should
make another run for this.
* Some example functions break hightlighting due to various
combinations of brackets. However changing them means leaving
the code style.
Fixes: https://github.com/nodejs/node/issues/4726
PR-URL: https://github.com/nodejs/node/pull/4733
Reviewed-By: Roman Reiss <me@silverwind.io>
The docs were recently refactored, and some "above" and "below"
references were no longer accurate. This commit removes many
such references, and replaces others with links.
PR-URL: https://github.com/nodejs/node/pull/4499
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/4534
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>
All the other properties get an h2/## but process.connected gets an
h3/### for no discernible reason. Change it to h2/## like the others.
PR-URL: https://github.com/nodejs/node/pull/4433
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Stephan Belanger <admin@stephenbelanger.com>
Reviewed-By: Roman Klauke <romaaan.git@gmail.com>
* Use single quotes consistently
* Modernize examples to use template strings and arrow funcs
* Fix a few typos
* Example edits for consistency
PR-URL: https://github.com/nodejs/node/pull/4282
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
* add backticks around names
* add single quotes around event names
* add parenthesis after function names
* add internal links between different sections
* add external links to MDN for some JavaScript references
* sort the link definitions alphabetically
PR-URL: https://github.com/nodejs/node/pull/4054
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
trivial commit to fix a couple inconsistent references to
the name of the project
PR-URL: https://github.com/nodejs/node/pull/4136
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Roman Klauke <romaaan.git@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Moved all the URLs in API docs to the bottom of the files as
reference-style links.
PR-URL: https://github.com/nodejs/node/pull/3845
Reviewed-By: James M Snell <jasnell@gmail.com>
Reorders, with no contextual changes, the process documentation
alphabetically.
PR-URL: https://github.com/nodejs/node/pull/3662
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Update the documentation for `process.stdout` and `process.stdout` to
clarify that writes can block when stdio is redirected to a file. In
all other cases, it's non-blocking.
PR-URL: https://github.com/nodejs/node/pull/3170
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
This adds an example of a semi-common promise pattern that could
result in false-positive 'unhandledRejection' events, to help motivate
why there is a dual 'rejectionHandled' event. I anticipate it being
helpful to users who encounter 'unhandledRejection' events that do not
stem from obvious typos such as the JSON.pasre example.
Also cleans up the promise rejection tracking sample. By using a Map
instead of array we can get O(1) deletion and actually record the errors.
And, fixed indentation and backtick usage there to align with the rest of
the document.
Reviewed-By: Stephan Belanger <admin@stephenbelanger.com>
Reviewed-By: Petka Antonov <petka.antonov@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/3438
Add corrections about when exit event fires and how .kill() works on
Windows.
PR-URL: https://github.com/nodejs/node/pull/2918
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
This change:
* notes that the exit event is not guaranteed to fire
* provides an example situation where the exit event may not fire
* makes a minor copyediting change
* enforces 80 character wrap in one place where it was not honored
Fixes: https://github.com/nodejs/node/issues/2853
PR-URL: https://github.com/nodejs/node/pull/2861
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
`process.stdout` always blocks as of
20176a9841
`WritableState.buffer` is `getBuffer()` as of
91586661c9
PR-URL: https://github.com/nodejs/node/pull/2549
Reviewed-By: Alexis Campailla <orangemocha@nodejs.org>
Reviewed-By: Evan Lucas <evanlucas@me.com>
This commit replaces instances of io.js with Node.js, based on the
recent convergence. There are some remaining instances of io.js,
related to build and the installer.
Fixes: https://github.com/nodejs/node/issues/2361
PR-URL: https://github.com/nodejs/node/pull/2367
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: João Reis <reis@janeasystems.com>
Adds the following to process:
- `process.geteuid()`
- `process.seteuid(id)`
- `process.getegid()`
- `process.setegid(id)`
PR-URL: https://github.com/iojs/io.js/pull/1536
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
This action is to encourage packagers to not build against a
shared V8 library since even minor bumps of V8 can create issues.
PR-URL: https://github.com/iojs/io.js/pull/1331
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
James M Snell
Jeremiah Senkpiel
doug.wade
Anna Henningsen
Bryan English
Patrick Mueller
Alexander Gromnitsky
Alexander Makarenko
Robert Jefe Lindstaedt
Mithun Patel
Robert C Jensen
cjihrig
Noah Rose
Prayag Verma
Evan Lucas
Benjamin Gruenbaum
Dmitriy Lazarev
Richard Sun
Dave
Rich Trott
jpersson
Scott Buchanan
Roman Klauke
Tristian Flanagan
Ben Noordhuis
Domenic Denicola
Anne-Gaelle Colom
Sam Roberts
Rod Vagg
Trevor Norris
Johan Bergström