ossp-pkg/l2/l2_ch_syslog.c
1.19
/*
** L2 - OSSP Logging Library
** Copyright (c) 2001 The OSSP Project (http://www.ossp.org/)
** Copyright (c) 2001 Cable & Wireless Deutschland (http://www.cw.com/de/)
**
** This file is part of OSSP L2, a flexible logging library which
** can be found at http://www.ossp.org/pkg/l2/.
**
** Permission to use, copy, modify, and distribute this software for
** any purpose with or without fee is hereby granted, provided that
** the above copyright notice and this permission notice appear in all
** copies.
**
** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE.
**
** l2_ch_syslog.c: syslog(3) channel implementation
*/
#include "l2.h"
#include <syslog.h>
/* declare private channel configuration */
typedef struct {
char *pszIdent; /* String to prepend to each syslog message */
int iLogopt; /* Manipulates how kernel interacts with syslogd */
int iFacility; /* Which part of the system generates this message */
int iPriority; /* EMERG, ALERT, CRIT, ERR, WARNING, NOTICE, INFO... */
int iMaskpri; /* Controls which priorities are or are not logged */
} l2_ch_syslog_t;
/* create channel */
static l2_result_t hook_create(l2_context_t *ctx, l2_channel_t *ch)
{
l2_ch_syslog_t *cfg;
/* allocate private channel configuration */
if ((cfg = (l2_ch_syslog_t *)malloc(sizeof(l2_ch_syslog_t))) == NULL)
return L2_ERR_MEM;
/* initialize configuration with reasonable defaults */
cfg->pszIdent = NULL;
cfg->iLogopt = 0;
cfg->iFacility = LOG_USER;
cfg->iPriority = (LOG_DEBUG|LOG_ERR);
cfg->iMaskpri = (0xFFFFFFFF); /* Allow all priorities to pass through */
/* link private channel configuration into channel context */
ctx->vp = cfg;
return L2_OK;
}
/* configure channel */
static l2_result_t hook_configure(l2_context_t *ctx, l2_channel_t *ch, const char *fmt, va_list ap)
{
l2_ch_syslog_t *cfg = (l2_ch_syslog_t *)ctx->vp;
l2_param_t pa[6];
l2_result_t rv;
/* feed and call generic parameter parsing engine */
L2_PARAM_SET(pa[0], ident, CHARPTR, &cfg->pszIdent);
L2_PARAM_SET(pa[1], logopts, INT, &cfg->iLogopt);
L2_PARAM_SET(pa[2], facility, INT, &cfg->iFacility);
L2_PARAM_SET(pa[3], priority, INT, &cfg->iPriority);
L2_PARAM_SET(pa[4], maskpriority, INT, &cfg->iMaskpri);
L2_PARAM_END(pa[5]);
rv = l2_util_setparams(pa, fmt, ap);
return rv;
}
/* open channel */
static l2_result_t hook_open(l2_context_t *ctx, l2_channel_t *ch)
{
l2_ch_syslog_t *cfg = (l2_ch_syslog_t *)ctx->vp;
/* open channel syslog */
openlog(cfg->pszIdent, cfg->iLogopt, cfg->iFacility);
setlogmask(cfg->iMaskpri);
return L2_OK;
}
/* write to channel */
static l2_result_t hook_write(l2_context_t *ctx, l2_channel_t *ch,
const char *buf, size_t buf_size)
{
l2_ch_syslog_t *cfg = (l2_ch_syslog_t *)ctx->vp;
/* write message to channel syslog */
syslog(cfg->iPriority, buf);
return L2_OK;
}
/* close channel */
static l2_result_t hook_close(l2_context_t *ctx, l2_channel_t *ch)
{
/* close channel syslog */
closelog();
return L2_OK;
}
/* destroy channel */
static l2_result_t hook_destroy(l2_context_t *ctx, l2_channel_t *ch)
{
l2_ch_syslog_t *cfg = (l2_ch_syslog_t *)ctx->vp;
/* destroy channel configuration */
free(cfg);
return L2_OK;
}
/* exported channel handler structure */
l2_handler_t l2_handler_syslog = {
L2_CHANNEL_OUTPUT,
hook_create,
hook_configure,
hook_open,
hook_write,
NULL,
hook_close,
hook_destroy
};