303 	char *oldvalue, *newvalue;  in env_append()  local
319 	oldvalue = env_get(varname);  in env_append()
320 	if (oldvalue)  in env_append()
321 		len += strlen(oldvalue);  in env_append()
331 	if (oldvalue) {  in env_append()
332 		strcpy(newvalue, oldvalue);  in env_append()
349 	char *oldvalue, *newvalue, *dst, *sub;  in env_replace()  local
356 	oldvalue = env_get(varname);  in env_replace()
357 	if (!oldvalue)  in env_replace()
360 	sub = strstr(oldvalue, substr);  in env_replace()
364 	oldvalue_len = strlen(oldvalue) + 1;  in env_replace()
387 	dst = strncat(dst, oldvalue, sub - oldvalue);  in env_replace()
390 	dst += sub - oldvalue;  in env_replace()
395 	len = oldvalue_len - substr_len - (sub - oldvalue);  in env_replace()
592 	char *oldvalue, *p;  in env_exist()  local
604 	oldvalue = env_get(varname);  in env_exist()
605 	if (oldvalue) {  in env_exist()
608 		p = strstr(oldvalue, buf);  in env_exist()
620 		p = strstr(oldvalue, buf);  in env_exist()
634 		p = strstr(oldvalue, buf);  in env_exist()
636 			len = strstr(p, " ") - oldvalue;  in env_exist()