97 	int n;  in net_read()  local
99 	n = read(fd,  buf,  len);  in net_read()
101 	if ((n < 0) && (errno == EAGAIN))  in net_read()
103 	else if (n == 0)  in net_read()
105 	return n;  in net_read()
110 	int n;  in net_recvfrom()  local
112 	CATCH_EINTR(n = recvfrom(fd,  buf,  len, 0, NULL, NULL));  in net_recvfrom()
113 	if (n < 0) {  in net_recvfrom()
118 	else if (n == 0)  in net_recvfrom()
120 	return n;  in net_recvfrom()
125 	int n;  in net_write()  local
127 	n = write(fd, buf, len);  in net_write()
129 	if ((n < 0) && (errno == EAGAIN))  in net_write()
131 	else if (n == 0)  in net_write()
133 	return n;  in net_write()
138 	int n;  in net_send()  local
140 	CATCH_EINTR(n = send(fd, buf, len, 0));  in net_send()
141 	if (n < 0) {  in net_send()
146 	else if (n == 0)  in net_send()
148 	return n;  in net_send()
153 	int n;  in net_sendto()  local
155 	CATCH_EINTR(n = sendto(fd, buf, len, 0, (struct sockaddr *) to,  in net_sendto()
157 	if (n < 0) {  in net_sendto()
162 	else if (n == 0)  in net_sendto()
164 	return n;  in net_sendto()