https://github.com/dmoj/setbufsize.so

LD_PRELOAD library for controlling standard stream buffer sizes.
https://github.com/dmoj/setbufsize.so

buffering linux override unbuffered

Last synced: about 1 month ago
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LD_PRELOAD library for controlling standard stream buffer sizes.

• Host: GitHub
• URL: https://github.com/dmoj/setbufsize.so
• Owner: DMOJ
• License: agpl-3.0
• Created: 2019-04-14T23:59:25.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2019-04-22T23:31:55.000Z (about 7 years ago)
• Last Synced: 2025-01-26T07:23:25.042Z (over 1 year ago)
• Topics: buffering, linux, override, unbuffered
• Language: C
• Homepage: https://dmoj.ca/
• Size: 20.5 KB
• Stars: 1
• Watchers: 5
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# setbufsize.so [![Linux Build Status](https://travis-ci.org/DMOJ/setbufsize.so.svg?branch=master)](https://travis-ci.org/DMOJ/setbufsize.so)

`LD_PRELOAD` library for controlling standard stream buffer sizes.

You can grab prebuilt 32- and 64-bit binaries from the [Releases](https://github.com/DMOJ/setbufsize/releases) tab.

These are built by [Travis](https://travis-ci.org/DMOJ/setbufsize) on a [CentOS 5 Docker image](https://github.com/pypa/manylinux),

so they should "just work" on any Linux distribution newer than that.

## Example Usage

For instance, if you wished to set the `stdout` of a program `app` to be unbuffered when connected to a terminal

(rather than the default line-buffering), the invocation would be:

```bash

$ LD_PRELOAD=/path/to/setbufsize64.so STDOUT_BUFFER_SIZE=0 ./app

```

`STDERR_BUFFER_SIZE` does the obvious thing, for `stderr`.

## Caveats

Due to its nature as an `LD_PRELOAD` object, `setbufsize` requires the target program to use `libc` for its output,

and furthermore be dynamically linked.