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 the QNX OS 8.0.
Utilities & Libraries
C Library Reference
W
wcscpy()
Copy a wide-character string

QNX Momentics IDE User's Guide
This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX 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 the QNX OS 8.0.
- Quickstart Guide
- System Architecture
  The System Architecture guide accompanies the QNX OS and is intended for both application developers and end-users.
- OS Components & Operations
- Graphics
- Programming
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX OS system and developers who want to create a QNX OS resource manager free from vulnerabilities.
- Utilities & Libraries
  - C Library Reference
    - What's in a Function Description?
    - Manifests
    - Character Sets
    - A
    - B
    - C
    - D
    - E
    - F
    - G
    - H
    - I
    - J
    - K
    - L
    - M
    - N
    - O
    - P
    - Q
    - R
    - S
    - T
    - U
    - V
    - W
      - wait()
        Wait for the status of a terminated child process
      - wait3()
        Wait for any child process to change its state
      - wait4()
        Wait for one or more child process to change its state
      - waitfor()
        Wait until a stat() on the specified path succeeds
      - waitfor_attach()
        Wait until there is hash of an attached path that matches the specified path
      - waitid()
        Wait for a child process to change state
      - waitpid()
        Wait for a child process to stop or terminate
      - walk_asinfo()
        Walk the asinfo area of the system page and process any entries matching the given name
      - warn(), warnx()
        Formatted error message
      - wcrtomb()
        Convert a wide-character code to a character
      - wcscasecmp()
        Compare two wide-character strings, ignoring case
      - wcscat()
        Concatenate two wide-character strings
      - wcschr()
        Find the first occurrence of a wide character in a string
      - wcscmp()
        Compare two wide-character strings
      - wcscoll()
        Compare two wide-character strings, using the locale's collating sequence
      - wcscpy()
        Copy a wide-character string
      - wcscspn()
        Count the wide characters at the beginning of a string that aren't in a given character set
      - wcsftime()
        Format the time into a wide-character string
      - wcslen()
        Compute the length of a wide-character string
      - wcsncasecmp()
        Compare two wide-character strings, ignoring case, up to a given length
      - wcsncat()
        Concatenate two wide-character strings, up to a maximum length
      - wcsncmp()
        Compare two wide-character strings, up to a given length
      - wcsncpy()
        Copy a wide-character string, to a maximum length
      - wcspbrk()
        Find the first wide character in a string that's in a given character set
      - wcsrchr()
        Find the last occurrence of a wide character in a string
      - wcsrtombs()
        Convert a wide-character string into a multibyte character string (restartable)
      - wcsspn()
        Count the wide characters at the beginning of a string that are in a given character set
      - wcsstr()
        Find one wide-character string inside another
      - wcstod(), wcstof(), wcstold()
        Convert a wide-character string into a double, float, or long double
      - wcstoimax(), wcstoumax()
        Convert a wide-character string into an integer
      - wcstok()
        Break a wide-character string into tokens
      - wcstol(), wcstoll()
        Convert a wide-character string into a long integer
      - wcstombs()
        Convert a wide-character string into a multibyte character string
      - wcstoul(), wcstoull()
        Convert a wide-character string into an unsigned long integer
      - wcsxfrm()
        Transform one wide-character string into another, to a given length
      - wctob()
        Convert a wide character to a single-byte code
      - wctomb()
        Convert a wide character into a multibyte character
      - wctrans()
        Define a wide-character mapping
      - wctype()
        Define a wide-character class
      - wcwidth()
        Determine the number of column positions of a wide character
      - wmemchr()
        Locate the first occurrence of a wide character in a buffer
      - wmemcmp()
        Compare the wide characters in two buffers
      - wmemcpy()
        Copy wide characters from one buffer to another
      - wmemmove()
        Copy wide characters from one buffer to another
      - wmemset()
        Set wide characters in memory
      - wordexp()
        Perform word expansions
      - wordfree()
        Free a word expansion buffer
      - wprintf()
        Write formatted output to stdout
      - write()
        Write bytes to a file
      - writeblock()
        Write blocks of data to a file
      - writev()
        Write bytes to a file
      - wscanf()
        Scan formatted wide-character input from stdin
    - X
    - Y
    - Z
    - Full Safety Information
    - Glossary
  - Devctl and Ioctl Commands
  - JSON Library Reference
  - PAM Reference
  - QNX Helpers Developer's Guide
    These libraries provide QNX helpers, including helpers that assist with logging, string conversion, and number and type sizes.
  - SPI Framework Technote
  - QNX Cryptography Library
    The QNX Cryptography Library (qcrypto) is a flexible cryptography framework that allows you to choose which cryptography provider responds to requests on a per-process basis.
  - QNX devcrypto Service
  - 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.
- Migrating to QNX OS 8.0
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX OS in the Amazon cloud environment.
QNX Toolkit for Visual Studio Code
This User's Guide describes the QNX^® Toolkit for Visual Studio Code. The guide introduces you to the QNX Toolkit by explaining the QNX development environment and how to build, run, and debug your QNX^® Operating System (OS) applications and systems.
QNX Hypervisor User's Guide
This User's Guide explains the QNX hypervisor architecture and provides instructions for installing and running a QNX Hypervisor system, changing system components and configuration, and using hypervisor features such as virtual devices (vdevs).
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation, explains how to obtain technical support, and provides some information about licensing.

wcscpy()

QNX SDP8.0C Library ReferenceAPIDeveloper

Copy a wide-character string

Synopsis:

#include <wchar.h>

wchar_t * wcscpy( wchar_t * ws1,
                  const wchar_t * ws2 );

Arguments:

ws1: A pointer to where you want to copy the string.
ws2: The wide-character string that you want to copy.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The wcscpy() function copies the string pointed to by ws2, including the terminating NUL wide character, into the array pointed to by ws1.

Note:

This function isn't guaranteed to work properly for copying overlapping strings; use wmemmove() instead.

Returns:

The same pointer as ws1.

Classification:

ANSI, POSIX 1003.1


Safety:
Cancellation point	No
Signal handler	Yes
Thread	Yes

Page updated: August 11, 2025