gluster-blockd: daemonize the utility

this patch,
deprecate ssh way of communicating between server nodes/pods
Reason: ssh way is hard to be accepted in container world (Kube).
        An another option kubeExec way seems to be a bit weird,
        to have uniform way of communication in container and
        non container worlds, we prefer RPC.

From now we communicate via RPC, using a static port 24009

Hence, we have two components,
server component -> gluster-blockd (daemon)
client component -> gluster-block  (cli)

Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/gluster-blockd.c b/gluster-blockd.c
new file mode 100644
index 0000000..18506ac
--- /dev/null
+++ b/gluster-blockd.c
@@ -0,0 +1,34 @@
+#define _GNU_SOURCE         /* See feature_test_macros(7) */
+#include <stdio.h>
+
+#include "rpc/block.h"
+#include "utils.h"
+
+
+blockTrans *
+block_exec_1_svc(char **cmd, struct svc_req *rqstp)
+{
+  FILE *fp;
+  static blockTrans *obj;
+
+  if(GB_ALLOC(obj) < 0)
+    return NULL;
+
+  if (GB_ALLOC_N(obj->out, 4096) < 0) {
+    GB_FREE(obj);
+    return NULL;
+  }
+
+  fp = popen(*cmd, "r");
+  if (fp != NULL) {
+    size_t newLen = fread(obj->out, sizeof(char), 4996, fp);
+    if (ferror( fp ) != 0) {
+      ERROR("%s", "Error reading command output\n");
+    } else {
+      obj->out[newLen++] = '\0';
+    }
+    obj->exit = WEXITSTATUS(pclose(fp));
+  }
+
+  return obj;
+}