Home
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
C Library Reference
E
endhostent()
Close the TCP connection and the hosts file

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
    - What's in a Function Description?
    - Manifests
    - Character Sets
    - A
    - B
    - C
    - D
    - E
      - eaccess()
        Check to see if the effective user ID can access a file or directory
      - _edata
        The end of the data segment, excluding BSS data
      - encrypt()
        Encrypt or decrypt a string
      - _end
        The end of the data segment, including BSS data
      - endfsent()
        Close the filesystem table (/etc/fstab) file
      - endgrent()
        Close the group database file
      - endhostent()
        Close the TCP connection and the hosts file
      - ENDIAN_BE16()
        Return a big-endian 16-bit value in native format
      - ENDIAN_BE32()
        Return a big-endian 32-bit value in native format
      - ENDIAN_BE64()
        Return a big-endian 64-bit value in native format
      - ENDIAN_LE16()
        Return a little-endian 16-bit value in native format
      - ENDIAN_LE32()
        Return a little-endian 32-bit value in native format
      - ENDIAN_LE64()
        Return a little-endian 64-bit value in native format
      - ENDIAN_RET16()
        Return an endian-swapped 16-bit value
      - ENDIAN_RET32()
        Return an endian-swapped 32-bit value
      - ENDIAN_RET64()
        Return an endian-swapped 64-bit value
      - ENDIAN_SWAP16()
        Endian-swap a 16-bit value in place
      - ENDIAN_SWAP32()
        Endian-swap a 32-bit value in place
      - ENDIAN_SWAP64()
        Endian-swap a 64-bit value in place
      - endnetent()
        Close the network name database file
      - endprotoent()
        Close the protocol name database file
      - endpwent()
        Close the password database file
      - endservent()
        Close the network services database file
      - endspent()
        Close the shadow password database file
      - endutent()
        Close the current user-information file
      - environ
        Pointer to the process's environment variables
      - erand48()
        Generate a pseudo-random double in a thread-safe manner
      - erf(), erff(), erfl()
        Compute the error function of a number
      - erfc(), erfcf(), erfcl()
        Complementary error function
      - err(), errx()
        Display a formatted error message, and then exit
      - errno
        Thread-local error variable
      - _etext
        The end of the text segment
      - execl()
        Execute a file
      - execle()
        Execute a file
      - execlp()
        Execute a file
      - execlpe()
        Execute a file
      - execv()
        Execute a file
      - execve()
        Execute a file
      - execvp()
        Execute a file
      - execvpe()
        Execute a file
      - _exit()
        Terminate the program
      - exit()
        Exit the calling program
      - exp(), expf(), expl()
        Compute the exponential function of a number
      - exp2(), exp2f(), exp2l()
        Calculate the base-2 exponential of a number
      - expm1(), expm1f(), expm1l()
        Compute the exponential of a number, then subtract 1
    - F
    - G
    - H
    - I
    - J
    - K
    - L
    - M
    - N
    - O
    - P
    - Q
    - R
    - S
    - T
    - U
    - V
    - W
    - X
    - Y
    - Z
    - Full Safety Information
    - Glossary
  - Devctl and Ioctl Commands
  - JSON Library Reference
  - PAM Reference
  - Utilities Reference
  - 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.

endhostent()

Close the TCP connection and the hosts file

Synopsis:

#include <netdb.h>

void endhostent( void );

Library:

libsocket

Use the -l socket option to qcc to link against this library.

Description:

The endhostent() routine closes the TCP connection and the hosts file.

Files:

/etc/hosts: Host database file.

Classification:

POSIX 1003.1


Safety:
Cancellation point	Yes
Interrupt handler	No
Signal handler	No
Thread	No

Page updated: March 12, 2026