Get an environment variable.
MText* mtext_getenv (const char * name)
Get an environment variable. The mtext_getenv() function searches the environment variable list for a string that matches the string pointed to by name.
If there is a match, the function decodes the value according to the current locale (LC_CTYPE) into an M-text, and return that M-text.
If there is no match, the function returns NULL.
Copyright (C) 2001 Information-technology Promotion Agency (IPA)
Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
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