MAN
text/troff
Magic Bytes
Offset: 0
2E 5C 22
The MAN file format consists of Unix manual pages written in the troff typesetting language, originally developed at Bell Labs and currently maintained within the GNU Project via groff. These files serve as the standard reference documentation for system commands, programming interfaces, and configuration files on Linux and Unix-like environments. As a plain text format utilizing specific formatting macros, it poses minimal security risks but remains a critical component of modern operating systems.
Validation Code
How to validate .man files in Python
Python
def is_man(file_path: str) -> bool:
"""Check if file is a valid MAN by magic bytes."""
signature = bytes([0x2E, 0x5C, 0x22])
with open(file_path, "rb") as f:
return f.read(3) == signatureHow to validate .man files in Node.js
Node.js
function isMAN(buffer: Buffer): boolean {
const signature = Buffer.from([0x2E, 0x5C, 0x22]);
return buffer.subarray(0, 3).equals(signature);
}
Go
func IsMAN(data []byte) bool {
signature := []byte{0x2E, 0x5C, 0x22}
if len(data) < 3 {
return false
}
return bytes.Equal(data[:3], signature)
}API Endpoint
GET
/api/v1/man
curl https://filesignature.org/api/v1/man