NAME
subenv - substitute environment names in string
SYNOPSIS
char *subenv (s)
char *s;
DESCRIPTION
The function subenv scans the source string s for environment names in the form of $NAME or ${NAME} and returns a pointer to a string in which the values of the environment names have been substituted for the names. If the value of an environment name is not defined, an empty string is substituted for the name. The source string s is not changed.
SEE ALSO
getenv
NOTES
If the result string is more than 200 characters, it is silently truncated.
The return value points to static data whose contents are overwritten by each call.