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QNX Helpers Developer's Guide
These libraries provide QNX helpers, including helpers that assist with logging, string conversion, and number and type sizes.
error.h
QNX helpers - Helpers related to the errno variable.
qh_set_errno_on_error()
Conditionally set errno

QNX Momentics IDE User's Guide
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  - QNX Helpers Developer's Guide
    These libraries provide QNX helpers, including helpers that assist with logging, string conversion, and number and type sizes.
    - attr.h
      QNX helpers - Attribute helpers.
    - endian.h
      QNX helpers - Endianness-related helpers.
    - error.h
      QNX helpers - Helpers related to the errno variable.
      - Macros
        These macros are related to errno handling.
      - qh_abort_on_errno()
        Conditionally log an error message using QNX helpers logging functions and then call abort() if the specified errno is not EOK
      - qh_set_errno()
        Set errno
      - qh_set_errno_on_error()
        Conditionally set errno
      - qh_sticky_error()
        Store a new error code as a variable if the new error is not zero and the previously stored one is
      - qh_sticky_error_last()
        Store a new error code as a variable if the new error is not zero
      - qh_strerror()
        Convert an error number into an error message and guarantee that errno is kept intact in the process
    - io.h
      QNX helpers - IO helpers.
    - log.h
      QNX helpers related to logging.
    - misc.h
      QNX helpers - Miscellaneous helpers.
    - qh.h
      QNX helpers that set QH_FILENAME.
    - size.h
      QNX helpers - Size-related helpers.
    - string.h
      QNX helpers - Helpers related to strings and string conversions.
    - time.h
      QNX helpers - Helpers related to time.
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QNX Software in the Cloud
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 OS applications and systems.
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

qh_set_errno_on_error()

QNX SDP8.0QNX Helpers Developer's GuideAPIDeveloper

Conditionally set errno

Synopsis:

#include <qh/error.h>

static errno_t qh_set_errno_on_error(const errno_t errval)

Arguments:

errval: The standard errno to set errno to if not EOK.

Library:

Description:

This function sets errno to the error value specified by errval if it is not EOK and returns the value of errval.

Returns:

The value of errval.

Page updated: May 17, 2024