qt-everywhere-src-5.15.1/qtbase/tests/auto/corelib/io/qprocess/testProcessEnvironment/main.cpp

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** This file is part of the test suite of the Qt Toolkit.
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#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
    if (argc == 1)
        return 1;

    char *env = getenv(argv[1]);
    if (env) {
        printf("%s", env);
        return 0;
    }
    return 1;
}