Lib.rs

* * * * Usage * * * *

Generate a file named, myfile with 128kbps of random data.

dd if=/dev/urandom bs=1024 count=128 of=myfile

Preview file info

ls -lh

Build a binary

cargo build

Cat the file then pipe the bytes to pipe-viewer

cat myfile | target/release/pipeviewer > myfile2

Using the 'yes' utility to test broken pipe error handling

yes | cargo run | head -n 1 > /dev/null

Preview console output

yes | cargo run | head -n 100000000 > /dev/null

Running the binary with cargo run

cargo run -- -h

Testing commandline arguments

cargo run -- somefile --outfile file.out -s

Testing environment variable with command line arguments

PV_SILENT=1 cargo run -- somefile --outfile file.out -s

Testing reader and writer

echo "some input" | cargo run --

Reroute output to /dev/null

echo "some input" | cargo run -- > /dev/null

Reroute output to outfile, -o /dev/null

echo "some input" | cargo run -- -o /dev/null

Generate output to outfile, -o output.txt

echo "some input" | cargo run -- -o output.txt

Reading from a file, output.txt -o /dev/null

echo "some input" | cargo run -- output.txt -o /dev/null

Reading from a file, output.txt -o /dev/null in silent

echo "some input" | cargo run -- output.txt --silent / -s

Write to a file with batch input

yes | cargo run -- -o yes.txt

Read from large input file

cargo run -- yes.txt -o /dev/null

Testing BufReader & BufWriter

cargo run -- yes.txt -o yes2.txt

Read from file and redirect output to specified output file

cargo run -- yes2.txt -- > yes3.txt

Piping output to head and redirect output to /dev/null

yes | cargo run -- | head -n 100000000 > /dev/null