Bash read multiple variables from stdin. , /plan fix the auth bug) that enters plan mode and immediately starts • Added claude plugins as an alias for claude plugin • Added 5 days ago · Claude Code Changelog (@ClaudeCodeLog). $ echo "test" | docker run -i -a stdin ubuntu May 22, 2017 · bash: read multi-line string into multiple variables Ask Question Asked 8 years, 9 months ago Modified 2 years, 5 months ago Jun 3, 2011 · Read multiple variables from stdin in a bash script I procrastinated to look up this for such a long time. Attach to STDIN/STDOUT/STDERR (-a, --attach) $ docker run -a stdin -a stdout -i -t ubuntu /bin/bash The following example pipes data into a container and prints the container's ID by attaching only to the container's STDIN. What I want to achieve is reading a line from stdin and split it among several variables, naively I'd do:. We‘ll […] The CDI feature has been enabled in the daemon; see Enable CDI devices. Oct 17, 2008 · What I want to do is the following: read in multiple line input from stdin into variable A make various operations on A pipe A without losing delimiter symbols (\n, \r, \t,etc) to another command The current problem is that, I can't read it in with read command, because it stops reading at newline. Use read command IFS= read -r inp -r flag is not a mandatory flag but is recommended in most cases. To read input from stdin to a variable, namely inp. Whether you’re processing user input, parsing log files, or handling output from other commands, reading data line by line is a common and essential operation. By reading from stdin within a while loop, your scripts can flexibly handle user input, external data, and stream piping. 69 changelog: New features: • Added the /claude-api skill for building applications with the Claude API and Anthropic SDK • Added Ctrl+U on an empty bash prompt (!) to exit bash mode, matching escape and backspace • Added numeric keypad support for selecting options in Claude's interview questions (previously only the Sep 3, 2015 · Instead, read stdin instead of using the variable where you intend to use the variable. This concise guide offers tips, examples, and best practices for seamless input handling. Jan 23, 2024 · In Bash scripting, reading input from the standard input (stdin) is a common task. Bash provides different ways to interactively read stdin from the user or from another command. 72 changelog: New features: • Added w key in /copy to write the focused selection directly to a file, bypassing the clipboard (useful over SSH) • Added optional description argument to /plan (e. You can give it two and it will hand each word on the line to you in the respective variables. Claude Code CLI 2. 3 hours ago · Claude Code Changelog (@ClaudeCodeLog). Bash built-in read: read one line from stdin and assign words to variables By default, read reads a line from stdin and assigns the read words to variables (but see also the -p option). Discover how to effectively use bash read from stdin in your scripts. . Nov 13, 2023 · When writing Bash scripts, the stdin stream unlocks powerful capabilities for building interactive tools, processing files, and connecting programs together. Any method that appends a newline results in non-empty stdin of my_cmd, even if the variable is empty or undefined. Dec 24, 2025 · This guide dives deep into how to read stdin into a variable in Bash functions, exploring basic methods, addressing multi-line challenges, and showcasing idiomatic approaches. g. In this comprehensive guide, you‘ll learn how to leverage stdin for advanced Bash scripting. Aug 8, 2011 · Reading from stdin into a variable or from a file into a variable. Sep 7, 2022 · Every once in a while, I have to read STDIN into a variable or a file before passing it on to something else and every time it annoys me that I have to use cat. today was enough. Feb 17, 2023 · Here string in Bash (<<<"$var" my_cmd) does append a newline. If you need to reference the data multiple times, figure out a way to refactor the work so that is not necessary. Whether you are collecting user data, processing commands, or building interactive scripts, understanding how to read from stdin is essential. 1. From official read manual by typing help read from command line > -r do not allow backslashes to escape any characters Feb 27, 2012 · Anyway, the "read" command to the shell takes multiple variable names, not just one. May 1, 2010 · The trick is not in making read take input from the pipe, but in using the variable in the same shell that executes the read. I can read stdin with cat, like this: Dec 28, 2025 · How to Read Line by Line from Standard Input in Bash (and Input Multiple Lines) In Bash scripting, interacting with standard input (stdin) is a fundamental task. Most examples in the existing answers use loops that immediately echo each of line as it is read from stdin. 33 likes. vbobja rnv zhge cpstt loasd krmmyx hky vqcjry suqj ljscei