nntp_group.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2004, 2007, 2010-2012, 2014-2015 Free Software
Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <mailutils/sys/nntp.h>
static int mu_nntp_parse_group(mu_nntp_t nntp, int code, unsigned long *ptotal, unsigned long *plow, unsigned long *phigh, char **name);
int
mu_nntp_group (mu_nntp_t nntp, const char *group, unsigned long *total, unsigned long *low, unsigned long *high, char **name)
{
int status;
if (nntp == NULL)
return EINVAL;
if (group == NULL || *group == '\0')
return MU_ERR_OUT_PTR_NULL;
switch (nntp->state)
{
case MU_NNTP_NO_STATE:
status = mu_nntp_writeline (nntp, "GROUP %s\r\n", group);
MU_NNTP_CHECK_ERROR (nntp, status);
mu_nntp_debug_cmd (nntp);
nntp->state = MU_NNTP_GROUP;
case MU_NNTP_GROUP:
status = mu_nntp_send (nntp);
MU_NNTP_CHECK_EAGAIN (nntp, status);
nntp->acknowledge = 0;
nntp->state = MU_NNTP_GROUP_ACK;
case MU_NNTP_GROUP_ACK:
status = mu_nntp_response (nntp, NULL, 0, NULL);
MU_NNTP_CHECK_EAGAIN (nntp, status);
mu_nntp_debug_ack (nntp);
MU_NNTP_CHECK_CODE (nntp, MU_NNTP_RESP_CODE_GROUP_SELECTED);
nntp->state = MU_NNTP_NO_STATE;
/* parse group. */
status = mu_nntp_parse_group (nntp, MU_NNTP_RESP_CODE_GROUP_SELECTED, total, low, high, name);
MU_NNTP_CHECK_ERROR (nntp, status);
break;
/* They must deal with the error first by reopening. */
case MU_NNTP_ERROR:
status = ECANCELED;
break;
default:
status = EINPROGRESS;
}
return status;
}
static int
mu_nntp_parse_group(mu_nntp_t nntp, int code, unsigned long *ptotal, unsigned long *plow, unsigned long *phigh, char **name)
{
unsigned long dummy = 0;
char *buf;
char format[24];
if (ptotal == NULL)
ptotal = &dummy;
if (plow == NULL)
plow = &dummy;
if (phigh == NULL)
phigh = &dummy;
/* An nntp response is not longer then 512. */
buf = calloc(1, 512);
if (buf == NULL)
{
return ENOMEM;
}
sprintf (format, "%d %%d %%d %%d %%%ds", code, 511);
sscanf (nntp->ack.buf, format, ptotal, plow, phigh, buf);
if (name)
{
*name = buf;
}
else
{
free (buf);
}
return 0;
}