getenv − get value for prom monitor environment variable

#include <prom/entrypt.h>

searches the prom monitors environment list (see for a string of the form and returns a pointer to the string if such a string is present, otherwise returns the value 0 (NULL).  differs from the call by reading the prom monitors environment, rather than the current environment of the running standalone program.  Since the current environment is inherited from the prom environment, they are often identical.  environ(7), prom_exec(2spp)