The architecture establishes a dedicated thread pool by combining a background `xargs` process with a named FIFO file stored in a temporary directory. An initialization routine validates the concurrency limit and assigns an unused file descriptor between 3 and 9 to process incoming NUL-separated commands. Tasks are subsequently written to this descriptor over time and adapt execution depending on whether the shell is interactive. A closing function then closes the file descriptor and monitors the background process until all queued operations conclude.
Key points
Native Bash scripts can achieve controlled parallel execution without relying on outside…: Native Bash scripts can achieve controlled parallel execution without relying on outside languages like Python.
Commands can be submitted dynamically across runtime rather than requiring a static list…: Commands can be submitted dynamically across runtime rather than requiring a static list upfront.
Task execution automatically adjusts between foreground and background modes depending on…: Task execution automatically adjusts between foreground and background modes depending on shell interactivity.
Sources checked by our analysis pipeline: 1
How to run shell commands in parallel while limiting their concurrency.
I had a use case recently where I wanted to speed up some Bash processing that I was doing, but still keep concurrency constrained. So I wondered: is there a straightforward way to create thread pools in Bash? The answer is: yes, but it takes some work to be semi-resilient and portable.
You may ask: why do this in Bash at all? It seems silly to use a language with poor concurrency controls. You'd be right to ask this question, and my answer is: because I have a fondness for Bash, and I wanted the challenge. But you're still probably better off using another language, such as Python.
Here is code that creates a command queue that accepts shell commands to execute. You do not need to know all the commands that you want executed up-front, you can submit commands to it over time.
1# Start this shell's command queue.
2# @param {number} $1 Maximum number of jobs to run at once
Digital platforms are tightening ecosystem controls through privacy upgrades, subscription services, and link screening, while job sites work to curb multi-level marketing fraud. Regulators and cultural institutions are also reshaping public engagement, from expanded youth safety mandates to heritage-focused creative competitions. These shifting strategies illustrate how tech firms and policymakers are navigating user protection and monetization pressures simultaneously.
Escalating technology export curbs aim to choke off advanced artificial intelligence hardware supplies to foreign adversaries. Restricting these critical components risks triggering swift economic retaliation that could disrupt international commerce and unsettle global financial markets. Policymakers face growing pressure as geopolitical tensions threaten to spill directly into volatile market conditions.
Essential operations across 74 countries and territories suffered severe disruptions after an internal technical failure disabled core digital communication tools and services starting Thursday. The incident compromised major platforms including Outlook and the Copilot AI assistant, causing widespread operational standstills across the Americas, Europe, Asia, and Africa. Impacted organizations faced crippled workflows while government officials underscored the growing global vulnerabilities tied to concentrated so…