What is the regex for unix file path?

The regex pattern for unix file path is `^\/(?:[^\/\0]+\/)*[^\/\0]+$`. This pattern validates unix absolute file path (must have at least one path component).

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /^\\/(?:[^\\/\0]+\\/)*[^\\/\0]+$/;` and test with `regex.test(yourValue)`. It returns `true` if the value matches.

How do I use this regex in Python?

In Python, use `import re; re.match(r'^\/(?:[^\/\0]+\/)*[^\/\0]+$', value)`. The raw string prefix (`r`) prevents Python from interpreting backslashes as escape characters.

Is this regex case-sensitive?

By default, yes. To make it case-insensitive, add the `i` flag in JavaScript (`/^\/(?:[^\/\0]+\/)*[^\/\0]+$/i`) or use `re.IGNORECASE` in Python.

Regex for Unix File Path

Regex Pattern

^\/(?:[^\/\0]+\/)*[^\/\0]+$

Unix absolute file path (must have at least one path component)

Quick Answer

The regex pattern for unix file path is `^\/(?:[^\/\0]+\/)*[^\/\0]+$`. Unix absolute file path (must have at least one path component). This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
/home/user/file.txt	✓ Matches
/var/log/syslog	✓ Matches
/etc/config	✓ Matches
relative/path	✗ No match
C:\Windows	✗ No match
/	✗ No match

Code Examples

javascript

const regex = /^\\/(?:[^\\/\0]+\\/)*[^\\/\0]+$/;
const isValid = regex.test(value);

python

import re
pattern = r'^\/(?:[^\/\0]+\/)*[^\/\0]+$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^\/(?:[^\/\0]+\/)*[^\/\0]+$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^\\/(?:[^\\/\0]+\\/)*[^\\/\0]+$/', $value)) {
    echo "valid";
}

java

String pattern = "^\\/(?:[^\\/\\0]+\\/)*[^\\/\\0]+$";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

Related Regex Patterns

File Extension

File extension at the end of a filename

Image File Extension

Common image file extensions

Video File Extension

Common video file extensions

Absolute Unix Path

Absolute filesystem path starting with /

Windows File Path

Windows absolute file path (C:\folder\file.txt)

Filename with Extension

Filename with at least one extension