KRB5_ENV_CCNAME
char *new_name = getenv(KRB5_ENV_CCNAME);
krb5_unsetenv(KRB5_ENV_CCNAME);
krb5_setenv(KRB5_ENV_CCNAME, ccache_name_buf, 1);
name = getenv(KRB5_ENV_CCNAME);
KRB5_ENV_CCNAME, (int)pw_uid) >= sizeof (buffer)) {
krb5_unsetenv(KRB5_ENV_CCNAME);
krb5_unsetenv(KRB5_ENV_CCNAME);
"%s=FILE:/tmp/krb5cc_%d", KRB5_ENV_CCNAME,