man mtext_putenv () - Change or add an environment variable.
NAME
mtext_putenv - Change or add an environment variable.
SYNOPSIS
int mtext_putenv (MText * mt)
DESCRIPTION
The mtext_putenv() function changes or adds the value of environment variables according to M-text mt. It calls the function putenv with an argument generated by encoding mt according to the current locale (LC_CTYPE).
RETURN VALUE
This function returns zero on success, or -1 if an error occurs.