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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | \DOC getenv
\TYPE {getenv : (string -> string)}
\SYNOPSIS
Returns the value of a Unix environment variable.
\DESCRIBE
{getenv x} returns the value of {x} from the current environment list; this
will include shell environment variables set before {HOL} is run.
\FAILURE
If in a Unix environment, fails with {getenv} if the variable is undefined,
or has an empty value. In other environments, it will normally fail anyway.
\EXAMPLE
{
#getenv `SHELL`;;
`/bin/csh` : string
}
\ENDDOC
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