SEI CERT C Coding Standard

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The C Standard, 7.22.4.6, paragraph 4 [ISO/IEC 9899:2011], states:

The getenv function returns a pointer to a string associated with the matched list member. The string pointed to shall not be modified by the program but may be overwritten by a subsequent call to the getenv function.

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This noncompliant code example attempts to compare the value of the TMP and TEMP environment variables to determine if they are the same:

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