associated with the file being executed.
\fIenvp\fP is an array of strings, conventionally of the form
\fBkey=value\fP, which are passed as environment to the new program.
-Both \fIargv\fP and \fIenvp\fP must be terminated by a null pointer.
+Both \fIargv\fP and \fIenvp\fP must be terminated by a NULL pointer.
The argument vector and environment can be accessed by the
called program's main function, when it is defined as:
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