1 /* GNU Mailutils -- a suite of utilities for electronic mail 2 Copyright (C) 1999-2021 Free Software Foundation, Inc. 3 4 This library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 3 of the License, or (at your option) any later version. 8 9 This library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General 15 Public License along with this library. If not, see 16 <http://www.gnu.org/licenses/>. */ 17 18 #ifdef HAVE_CONFIG_H 19 # include <config.h> 20 #endif 21 22 #include <string.h> 23 #include <errno.h> 24 #include <mailutils/sys/pop3.h> 25 26 int mu_pop3_noop(mu_pop3_t pop3)27mu_pop3_noop (mu_pop3_t pop3) 28 { 29 int status; 30 31 if (pop3 == NULL) 32 return EINVAL; 33 34 switch (pop3->state) 35 { 36 case MU_POP3_NO_STATE: 37 status = mu_pop3_writeline (pop3, "NOOP\r\n"); 38 MU_POP3_CHECK_ERROR (pop3, status); 39 MU_POP3_FCLR (pop3, MU_POP3_ACK); 40 pop3->state = MU_POP3_NOOP; 41 42 case MU_POP3_NOOP: 43 status = mu_pop3_response (pop3, NULL); 44 MU_POP3_CHECK_EAGAIN (pop3, status); 45 MU_POP3_CHECK_OK (pop3); 46 pop3->state = MU_POP3_NO_STATE; 47 break; 48 49 /* They must deal with the error first by reopening. */ 50 case MU_POP3_ERROR: 51 status = ECANCELED; 52 break; 53 54 default: 55 status = EINPROGRESS; 56 } 57 58 return status; 59 } 60