syslogstream.c
3.18 KB
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 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, 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 GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <syslog.h>
#include <errno.h>
#include <string.h>
#include <mailutils/errno.h>
#include <mailutils/stream.h>
#include <mailutils/sys/syslogstream.h>
static int
_syslog_stream_write (struct _mu_stream *stream, const char *buf,
size_t size, size_t *pret)
{
struct _mu_syslog_stream *lsp = (struct _mu_syslog_stream *)stream;
*pret = size;
if (size > 0 && buf[size-1] == '\n')
size--;
if (size == 0)
return 0;
if (lsp->logger)
lsp->logger (lsp->prio, "%*.*s", (int) size, (int) size, buf);
else
syslog (lsp->prio, "%*.*s", (int) size, (int) size, buf);
return 0;
}
static int sev2prio[] = {
LOG_DEBUG,
LOG_INFO,
LOG_NOTICE,
LOG_WARNING,
LOG_ERR,
LOG_CRIT,
LOG_ALERT,
LOG_EMERG
};
static int
_syslog_ctl (struct _mu_stream *str, int code, int opcode, void *arg)
{
struct _mu_syslog_stream *sp = (struct _mu_syslog_stream *)str;
unsigned n;
if (code == MU_IOCTL_LOGSTREAM)
switch (opcode)
{
case MU_IOCTL_LOGSTREAM_GET_SEVERITY:
if (!arg)
return EINVAL;
for (n = 0; n < MU_ARRAY_SIZE (sev2prio); n++)
if (sev2prio[n] == sp->prio)
{
*(int*)arg = n;
break;
}
return MU_ERR_FAILURE;
case MU_IOCTL_LOGSTREAM_SET_SEVERITY:
if (!arg)
return EINVAL;
n = *(unsigned*)arg;
if (n < MU_ARRAY_SIZE (sev2prio))
sp->prio = sev2prio[n];
else
return EINVAL;
break;
default:
return ENOSYS;
}
else if (code == MU_IOCTL_SYSLOGSTREAM)
{
if (!arg)
return EINVAL;
switch (opcode)
{
case MU_IOCTL_SYSLOGSTREAM_SET_LOGGER:
sp->logger = arg;
break;
case MU_IOCTL_SYSLOGSTREAM_GET_LOGGER:
*(void (**) (int, const char *, ...))arg = sp->logger;
break;
default:
return ENOSYS;
}
}
else
return ENOSYS;
return 0;
}
int
_syslog_setbuf_hook (mu_stream_t str, enum mu_buffer_type type, size_t size)
{
if (type != mu_buffer_line)
return EACCES;
return 0;
}
int
mu_syslog_stream_create (mu_stream_t *pstream, int prio)
{
struct _mu_syslog_stream *str =
(struct _mu_syslog_stream *) _mu_stream_create (sizeof (*str),
MU_STREAM_WRITE);
if (!str)
return ENOMEM;
str->prio = prio;
str->logger = NULL;
str->base.write = _syslog_stream_write;
str->base.ctl = _syslog_ctl;
str->base.setbuf_hook = _syslog_setbuf_hook;
*pstream = (mu_stream_t) str;
mu_stream_set_buffer (*pstream, mu_buffer_line, 0);
return 0;
}