lgetenv
if (((s = lgetenv(e)) == NULL) || (*s == 0)) {
s = lgetenv("LESSSEPARATOR");
name = lgetenv("LESSHISTFILE");
home = lgetenv("HOME");
s = lgetenv("LESSHISTSIZE");
if (envname != NULL && (filename = lgetenv(envname)) != NULL)
return (dirfile(lgetenv("HOME"), filename));
s = lgetenv("LESSMETAESCAPE");
mchars = lgetenv("LESSMETACHARS");
char *lgetenv(char *);
end_ansi_chars = lgetenv("LESSANSIENDCHARS");
mid_ansi_chars = lgetenv("LESSANSIMIDCHARS");
if ((shell = lgetenv("SHELL")) != NULL && *shell != '\0') {
s = lgetenv(less_is_more ? "MORE" : "LESS");
editor = lgetenv("VISUAL");
editor = lgetenv("EDITOR");
editproto = lgetenv("LESSEDIT");
s = lgetenv("LESS_IS_MORE");
s = lgetenv("LESSSECURE");
else if ((s = lgetenv("LINES")) != NULL)
else if ((s = lgetenv("COLUMNS")) != NULL)
if ((term = lgetenv("TERM")) == NULL)