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Section 7.20.4.5 of C99 states that \[[ISO/IEC 9899:1999|AA. References#ISOBibliography#ISO/IEC 9899-1999]\] |
The set of environment names and the method for altering the environment list are implementation-defined.
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One common difference between implementations is whether or not environment variables are case sensitive. While UNIX-like implementations are generally case sensitive, environment variables are "not case sensitive in Windows 98/Me and Windows NT/2000/XP" \[[MSDN|AA. References#MSDNBibliography#MSDN]\]. |
Duplicate Environment Variable Detection (POSIX)
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\[[ISO/IEC 9899:1999|AA. References#ISOBibliography#ISO/IEC 9899-1999]\] Section 7.20.4, "Communication with the environment" \[[ISO/IEC PDTR 24772|AA. References#ISOBibliography#ISO/IEC PDTR 24772]\] "XYS Executing or Loading Untrusted Code" \[[MITRE 07|AA. References#MITREBibliography#MITRE 07]\] [CWE-462|http://cwe.mitre.org/data/definitions/462.html], "Duplicate Key in Associative List (Alist)," [CWE-807|http://cwe.mitre.org/data/definitions/807.html], "Reliance on Untrusted Inputs in a Security Decision" \[[MSDN|AA. References#MSDNBibliography#MSDN]\] [{{getenv()}}|http://msdn.microsoft.com/en-us/library/tehxacec(VS.71).aspx] |
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