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+ /*
+ ** L2 - OSSP Logging Library
+ ** Copyright (c) 2001-2002 The OSSP Project (http://www.ossp.org/)
+ ** Copyright (c) 2001-2002 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_var.c: OSSP var channel implementation
+ */
+
+ #include "l2.h"
+ /*#include "l2_var.h"*/
+
+ /* declare private channel configuration */
+ typedef struct {
+ char *vardef;
+ } l2_ch_var_t;
+
+ /* create channel */
+ static l2_result_t hook_create(l2_context_t *ctx, l2_channel_t *ch)
+ {
+ l2_ch_var_t *cfg;
+
+ /* allocate private channel configuration */
+ if ((cfg = (l2_ch_var_t *)malloc(sizeof(l2_ch_var_t))) == NULL)
+ return L2_ERR_MEM;
+
+ /* initialize configuration with reasonable defaults */
+ cfg->vardef = NULL;
+
+ /* 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_var_t *cfg;
+ l2_param_t pa[1];
+ l2_result_t rv;
+ l2_env_t *env;
+
+ /* parameter checks */
+ if ((cfg = (l2_ch_var_t *)ctx->vp) == NULL)
+ return L2_ERR_ARG;
+
+ /* feed and call generic parameter parsing engine */
+ L2_PARAM_SET(pa[0], variable, STR, &cfg->vardef);
+ L2_PARAM_END(pa[1]);
+ l2_channel_env(ch, &env);
+ rv = l2_util_setparams(env, pa, fmt, ap);
+
+ return rv;
+ }
+
+ /* write to channel */
+ static l2_result_t hook_write(l2_context_t *ctx, l2_channel_t *ch,
+ l2_level_t level, const char *buf, size_t buf_size)
+ {
+ l2_ch_var_t *cfg;
+
+ /* parameter checks */
+ if ((cfg = (l2_ch_var_t *)ctx->vp) == NULL)
+ return L2_ERR_ARG;
+ if (cfg->vardef == NULL)
+ return L2_ERR_ARG;
+
+ /* expand variables */
+ /* FIXME */
+
+ return L2_OK;
+ }
+
+ /* destroy channel */
+ static l2_result_t hook_destroy(l2_context_t *ctx, l2_channel_t *ch)
+ {
+ l2_ch_var_t *cfg = (l2_ch_var_t *)ctx->vp;
+
+ /* destroy channel configuration */
+ if (cfg->vardef != NULL)
+ free(cfg->vardef);
+ free(cfg);
+
+ return L2_OK;
+ }
+
+ /* exported channel handler structure */
+ l2_handler_t l2_handler_var = {
+ "var",
+ L2_CHANNEL_FILTER,
+ hook_create,
+ hook_configure,
+ NULL,
+ hook_write,
+ NULL,
+ NULL,
+ hook_destroy
+ };
+
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