---
name: "chktri"
section: "1"
platform: "linux"
package: "liwc"
version: "1.21-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/chktri"
---

# chktri(1)

check for trigraphs in C source code

## NAME

chktri - check for trigraphs in C source code

## SYNOPSIS

chktri \[file ...\]

## DESCRIPTION

This program looks for lines containing trigraphs in C source code. Trigraphs are a way to represent certain characters in C source code as two question marks and a third character. For example, a backslash could be represented as \`??/'. For a detail specification, see section 5.2.1.1 in the  ISO 9899:1990 standard or any decent C book. (You don't really want to know.)

## AUTHOR

Lars Wirzenius, liw@iki.fi.