--- l2_ch_fd.c 2001/09/05 07:47:12 1.7
+++ l2_ch_fd.c 2001/09/06 19:27:02 1.8
@@ -24,47 +24,127 @@
** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE.
**
-** l2_ch_syslog.c: filedescriptor channel implementation
+** l2_ch_fd.c: file descriptor channel implementation
*/
#include "l2.h"
+#include <unistd.h>
+/* declare private channel configuration */
+typedef struct {
+ int fd;
+} l2_ch_file_t;
+
+/* create channel */
static l2_result_t hook_create(l2_context_t *ctx, l2_channel_t *ch)
{
+ l2_ch_file_t *cfg;
+
+ /* allocate private channel configuration */
+ if ((cfg = (l2_ch_file_t *)malloc(sizeof(l2_ch_file_t))) == NULL)
+ return L2_ERR_MEM;
+
+ /* initialize configuration with reasonable defaults */
+ cfg->fd = -1;
+
+ /* 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)
{
- return L2_OK;
+ l2_ch_file_t *cfg;
+ l2_param_t pa[1];
+ l2_result_t rv;
+
+ /* parameter checks */
+ if ((cfg = (l2_ch_file_t *)ctx->vp) == NULL)
+ return L2_ERR_ARG;
+
+ /* feed and call generic parameter parsing engine */
+ L2_PARAM_SET(pa[0], filedescriptor, INT, &cfg->fd);
+ L2_PARAM_END(pa[1]);
+ 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_file_t *cfg;
+ int mode;
+
+ /* parameter checks */
+ if ((cfg = (l2_ch_file_t *)ctx->vp) == NULL)
+ return L2_ERR_ARG;
+ if ((cfg->fd == -1))
+ return L2_ERR_ARG;
+
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_file_t *cfg;
+
+ /* parameter checks */
+ if ((cfg = (l2_ch_file_t *)ctx->vp) == NULL)
+ return L2_ERR_ARG;
+ if (cfg->fd == -1)
+ return L2_ERR_ARG;
+
+ /* write message to channel file */
+ if (write(cfg->fd, buf, buf_size) == -1)
+ return L2_ERR_SYS;
+
return L2_OK;
}
+/* flush channel */
static l2_result_t hook_flush(l2_context_t *ctx, l2_channel_t *ch)
{
+ /* NOP for this channel, because Unix I/O files are unbuffered! */
+
return L2_OK;
}
+/* close channel */
static l2_result_t hook_close(l2_context_t *ctx, l2_channel_t *ch)
{
+ l2_ch_file_t *cfg;
+
+ /* parameter checks */
+ if ((cfg = (l2_ch_file_t *)ctx->vp) == NULL)
+ return L2_ERR_ARG;
+ if (cfg->fd == -1)
+ return L2_ERR_ARG;
+
+ /* close channel file */
+ /* nothing to close */
+
return L2_OK;
}
+/* destroy channel */
static l2_result_t hook_destroy(l2_context_t *ctx, l2_channel_t *ch)
{
+ /* parameter checks */
+ if (ctx->vp == NULL)
+ return L2_ERR_ARG;
+
+ /* destroy channel configuration */
+ free(ctx->vp);
+
return L2_OK;
}
+/* exported channel handler structure */
l2_handler_t l2_handler_fd = {
L2_CHANNEL_OUTPUT,
hook_create,
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