Thread: Help with deprecated functions

  1. #1
    Registered User
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    Help with deprecated functions

    I am trying to extract an environment variable and append a string to it. This is my code:

    const char* env_temp = getenv("TEMP");
    char buff[1024];
    strcpy(buff, env_temp);
    strcat(buff, "\blahblah");


    When compiling in VS 2015 I get:
    error C4996: 'getenv': This function or variable may be unsafe. Consider using _dupenv_s instead.
    error C4996: 'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead.
    error C4996: 'strcat': This function or variable may be unsafe. Consider using strcat_s instead.


    I have tried fiddling with these to no avail (I am not a C++ programmer). Can anyone help?

  2. #2
    and the hat of int overfl Salem's Avatar
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    First off, That's C code not C++.

    Read this
    Compiler Warning (level 3) C4996

    You can disable it by putting this line right at the start of your code (before any #includes)
    Code:
    #define _CRT_SECURE_NO_WARNINGS
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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