#cli #linux #utility #file

app fadvise

Call posix_fadvise on a specific file

1 unstable release

Uses new Rust 2021

0.1.0 Aug 21, 2022

#1492 in Command line utilities

Apache-2.0

8KB
120 lines

fadvise

fadvise is a CLI command to call posix_fadvise(2) for a specific file.

How to use

The following is an example of cache eviction.

 cat Cargo.toml > /dev/null
❯ fincore -b Cargo.toml 
  RES PAGES SIZE FILE
 4096     1  500 Cargo.toml
 fadvise dontneed Cargo.toml 
filename: Cargo.toml
advice: POSIX_FADV_DONTNEED
offset: 0
len: 500
 fincore -b Cargo.toml
RES PAGES SIZE FILE
  0     0  500 Cargo.toml

Installation

From crates.io

 cargo install fadvise

From source code (GitHub)

 git clone https://github.com/StoneDot/linux-tools.git
 cd linux-tools/fadvise/
 cargo install --path .

Completion

bash

# Create a directory to store a completion code
❯ mkdir -p $HOME/.local/share/bash-completion/completions
# Place a completion code
❯ fadvise completion --shell bash > $HOME/.local/share/bash-completion/completions/fadvise

zsh

# Create a directory to store a completion code
❯ mkdir -p $HOME/.zsh.d/functions
# Place a completion code
❯ fadvise completion --shell zsh > $HOME/.zsh.d/functions/_fadvise
# Execute the following line if your fpath does not include `$HOME/.zsh.d/functions`
❯ echo '[ "${fpath[(I)$HOME/.zsh.d/functions]}" -eq 0 ] && fpath=($fpath $HOME/.zsh.d/functions)' | tee -a $HOME/.zshrc

Dependencies

~4MB
~79K SLoC