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QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
Utilities & Libraries
Utilities Reference
F
fmt
Format concatenated input

QNX Momentics IDE User's Guide
This User's Guide describes version 7.1 of the Integrated Development Environment (IDE) that's part of the QNX Momentics tool suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
- Quickstart Guide
- OS Components & Operations
- Audio & Graphics API
- Multimedia
- Networking Middleware
- Programming
- Sensor Framework
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX Neutrino RTOS system and developers who want to create a QNX Neutrino resource manager free from vulnerabilities.
- Utilities & Libraries
  - Addon Interfaces Library Reference
  - C Library Reference
  - Devctl and Ioctl Commands
  - JSON Library Reference
  - PAM Reference
  - Utilities Reference
    - Utility Conventions
    - A
    - B
    - C
    - D
    - E
    - F
      - false
        Return false value (POSIX)
      - fcat
        Display compressed (frozen) files (UNIX)
      - fdisk
        Create and manage partitions on a hard disk
      - fesh
        Fat embedded shell (QNX Neutrino)
      - fgrep
        Fixed string grep (UNIX)
      - file
        Determine file type (UNIX)
      - find
        Find files (POSIX)
      - flashctl
        Manage a flash filesystem
      - flex
        Generate programs for lexical tasks
      - fmt
        Format concatenated input
      - fold
        Fold lines (POSIX)
      - freeze
        Compress and uncompress files (UNIX)
      - fs-cifs
        Common Internet Filesystem or SMB client filesystem (QNX Neutrino)
      - fs-dos.so
        DOS filesystem (QNX Neutrino)
      - fs-etfs-ram
        Embedded transaction filesystem for RAM/SRAM
      - fs-ext2.so
        Linux Ext2 filesystem
      - fs-mac.so
        Shared object that supports Apple Macintosh HFS and HFS Plus (QNX Neutrino)
      - fs-nfs3
        NFS 3 client filesystem (QNX Neutrino)
      - fs-nt.so
        Shared object that supports the Windows NT filesystem (QNX Neutrino)
      - fs-qnx6.so
        Shared object that supports the Power-Safe filesystem (QNX Neutrino)
      - fs-qtd.so
        Shared object that supports the QNX Trusted Disk feature (QNX Neutrino)
      - fs-udf.so
        Universal Disk Format and ISO 9660 filesystem support
      - fsencrypt
        Filesystem encryption manager
      - fsevmgr
        Filesystem event manager
      - fsysinfo
        Display filesystem statistics (QNX Neutrino)
      - /etc/fstab
        File for predefined mountpoints
      - ftp
        Internet file transfer program (UNIX)
      - /etc/ftpchroot
        Access-control file for ftpd
      - ftpd
        Internet file transfer protocol daemon (NetBSD)
      - /etc/ftpd.conf
        Configuration file for ftpd
      - /etc/ftpusers
        Access-control file for ftpd
      - fullpath
        Display network-qualified pathnames (QNX)
      - fuser
        List the process IDs of all processes that have one or more files open (POSIX)
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    - Commonly Used Environment Variables
    - Selecting the Target System
    - Glossary
  - WPA Control Interface Reference
    This document provides a reference for the Wi-Fi Protected Access (WPA) control interface, which provides a C API for the WPA/IEEE 802.11i protocols in Wi-Fi client stations. Application developers who want to control WPA operations and get associated status and event data should read this reference.
QNX Hypervisor
The QNX Hypervisor allows you to run multiple OSs on a target system so you can separate critical and non-critical functions, support a wide variety of applications, and reduce hardware costs.
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX software in Amazon Web Services (AWS) and Microsoft Azure (Azure).
QNX Advanced Virtualization Frameworks User's Guide
This User's Guide is aimed at all systems integrators and developers who want to design and build embedded systems using the QNX Advanced Virtualization Frameworks.
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

fmt

Format concatenated input

Syntax:

fmt [-w width] [-m maximum] [-] [file...]

Runs on:

QNX Neutrino

Options:

-m maximum: The maximum line length. The default is 75 characters.
-w width: Make the lines as close to width as possible. The default width is 65 characters.
-: Read from standard input
file...: The file or files to be formatted.

Description:

The fmt utility concatenates the input files, formats the output as specified by the width and maximum options, and sends the results to standard output. Non-indenting tabs are converted to spaces; tabs are used for indentation where possible. If no input files are given, fmt reads from standard input.

Page updated: March 12, 2026