Index: ossp-pkg/l2/l2_ch_pipe.c
RCS File: /v/ossp/cvs/ossp-pkg/l2/l2_ch_pipe.c,v
rcsdiff -q -kk '-r1.8' '-r1.9' -u '/v/ossp/cvs/ossp-pkg/l2/l2_ch_pipe.c,v' 2>/dev/null
--- l2_ch_pipe.c	2001/09/12 09:42:34	1.8
+++ l2_ch_pipe.c	2001/09/14 11:13:32	1.9
@@ -24,53 +24,99 @@
 **  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 **  SUCH DAMAGE.
 **
-**  l2_ch_pipe.c: program pipe channel implementation
+**  l2_ch_pipe.c: pipe channel implementation
 */
 
 #include "l2.h"
 
+#include <unistd.h>
+
+/* declare private channel configuration */
+typedef struct {
+    int iPipe; /* pipe filedescriptor used for writing only */
+} l2_ch_pipe_t;
+
+/* create channel */
 static l2_result_t hook_create(l2_context_t *ctx, l2_channel_t *ch)
 {
+    l2_ch_pipe_t *cfg;
+
+    /* allocate private channel configuration */
+    if ((cfg = (l2_ch_pipe_t *)malloc(sizeof(l2_ch_pipe_t))) == NULL)
+        return L2_ERR_ARG;
+
+    /* initialize configuration with reasonable defaults */
+    cfg->iPipe = -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_pipe_t *cfg = (l2_ch_pipe_t *)ctx->vp;
+    l2_param_t pa[2]; 
+    l2_result_t rv;
 
-static l2_result_t hook_open(l2_context_t *ctx, l2_channel_t *ch)
-{
-    return L2_OK;
-}
+    /* feed and call generic parameter parsing engine */
+    L2_PARAM_SET(pa[0], pipe, INT, &cfg->iPipe);
+    L2_PARAM_END(pa[1]);
+    rv = l2_util_setparams(pa, fmt, ap);
 
-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)
-{
-    return L2_OK;
+    /* validate the pipe fd */
+    if (cfg->iPipe == -1)
+        return L2_ERR_ARG;
+
+    return rv;
 }
 
-static l2_result_t hook_flush(l2_context_t *ctx, l2_channel_t *ch)
+/* 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_pipe_t *cfg = (l2_ch_pipe_t *)ctx->vp;
+    
+    /* write message to channel pipe */
+    if (write(cfg->iPipe, buf, buf_size) == -1)
+        return L2_ERR_SYS;
+
     return L2_OK;
 }
 
+/* close channel */
 static l2_result_t hook_close(l2_context_t *ctx, l2_channel_t *ch)
 {
+    l2_ch_pipe_t *cfg = (l2_ch_pipe_t *)ctx->vp;
+
+    /* close channel pipe */
+    close(cfg->iPipe);
+    cfg->iPipe = -1;
+
     return L2_OK;
 }
 
+/* destroy channel */
 static l2_result_t hook_destroy(l2_context_t *ctx, l2_channel_t *ch)
 {
+    l2_ch_pipe_t *cfg = (l2_ch_pipe_t *)ctx->vp;
+
+    /* destroy channel configuration */
+    free(cfg);
+
     return L2_OK;
 }
 
+/* exported channel handler structure */
 l2_handler_t l2_handler_pipe = {
     L2_CHANNEL_OUTPUT,
     hook_create,
     hook_configure,
-    hook_open,
+    NULL,
     hook_write,
-    hook_flush,
+    NULL,
     hook_close,
     hook_destroy
 };