put mds-registry in its own directory

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 0 insertions, 890 deletions

diff --git a/src/mds-registry.c b/src/mds-registry.c
deleted file mode 100644
index b0c6962..0000000
--- a/src/mds-registry.c
+++ /dev/null
@@ -1,890 +0,0 @@
-/**
- * mds — A micro-display server
- * Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "mds-registry.h"
-
-#include <libmdsserver/macros.h>
-#include <libmdsserver/util.h>
-#include <libmdsserver/mds-message.h>
-#include <libmdsserver/hash-table.h>
-#include <libmdsserver/hash-help.h>
-#include <libmdsserver/client-list.h>
-
-#include <errno.h>
-#include <inttypes.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#define reconnect_to_display() -1 /* TODO */
-
-
-
-#define MDS_REGISTRY_VARS_VERSION  0
-
-
-
-/**
- * This variable should declared by the actual server implementation.
- * It must be configured before `main` is invoked.
- * 
- * This tells the server-base how to behave
- */
-server_characteristics_t server_characteristics =
-  {
-    .require_privileges = 0,
-    .require_display = 1,
-    .require_respawn_info = 0,
-    .sanity_check_argc = 1
-  };
-
-
-
-/**
- * Value of the ‘Message ID’ header for the next message
- */
-static int32_t message_id = 2;
-
-/**
- * Buffer for received messages
- */
-static mds_message_t received;
-
-/**
- * Whether the server is connected to the display
- */
-static int connected = 1;
-
-/**
- * Protocol registry table
- */
-static hash_table_t reg_table;
-
-/**
- * Reusable buffer for data to send
- */
-static char* send_buffer = NULL;
-
-/**
- * The size of `send_buffer`
- */
-static size_t send_buffer_size = 0;
-
-/**
- * General mutex
- */
-static pthread_mutex_t reg_mutex;
-
-/**
- * General condition
- */
-static pthread_cond_t reg_cond;
-
-/**
- * Used to temporarily store the old value when reallocating heap-allocations
- */
-static char* old;
-
-
-
-/**
- * This function will be invoked before `initialise_server` (if not re-exec:ing)
- * or before `unmarshal_server` (if re-exec:ing)
- * 
- * @return  Non-zero on error
- */
-int __attribute__((const)) preinitialise_server(void)
-{
-  if ((errno = pthread_mutex_init(&reg_mutex, NULL)))
-    {
-      perror(*argv);
-      return 1;
-    }
-  
-  if ((errno = pthread_cond_init(&reg_cond, NULL)))
-    {
-      perror(*argv);
-      pthread_mutex_destroy(&reg_mutex);
-      return 1;
-    }
-  
-  return 0;
-}
-
-
-/**
- * This function should initialise the server,
- * and it not invoked after a re-exec.
- * 
- * @return  Non-zero on error
- */
-int initialise_server(void)
-{
-  const char* const message =
-    "Command: intercept\n"
-    "Message ID: 0\n"
-    "Length: 32\n"
-    "\n"
-    "Command: register\n"
-    "Client closed\n"
-    /* -- NEXT MESSAGE -- */
-    "Command: reregister\n"
-    "Message ID: 1\n"
-    "\n";
-  
-  /* We are asking all servers to reregister their
-     protocols for two reasons:
-     
-     1) The server would otherwise not get registrations
-        from servers started before this server.
-     2) If this server crashes we may miss registrations
-        that happen between the crash and the recovery.
-   */
-  
-  if (full_send(message, strlen(message)))
-    return 1;
-  if (hash_table_create_tuned(&reg_table, 32))
-    {
-      perror(*argv);
-      hash_table_destroy(&reg_table, NULL, NULL);
-      return 1;
-    }
-  reg_table.key_comparator = (compare_func*)string_comparator;
-  reg_table.hasher = (hash_func*)string_hash;
-  server_initialised();
-  mds_message_initialise(&received);
-  return 0;
-}
-
-
-/**
- * This function will be invoked after `initialise_server` (if not re-exec:ing)
- * or after `unmarshal_server` (if re-exec:ing)
- * 
- * @return  Non-zero on error
- */
-int postinitialise_server(void)
-{
-  if (connected)
-    return 0;
-  
-  if (reconnect_to_display())
-    {
-      mds_message_destroy(&received);
-      return 1;
-    }
-  connected = 1;
-  return 0;
-}
-
-
-/**
- * Calculate the number of bytes that will be stored by `marshal_server`
- * 
- * On failure the program should `abort()` or exit by other means.
- * However it should not be possible for this function to fail.
- * 
- * @return  The number of bytes that will be stored by `marshal_server`
- */
-size_t marshal_server_size(void)
-{
-  size_t i, rc = 2 * sizeof(int) + sizeof(int32_t) + 3 * sizeof(size_t);
-  hash_entry_t* entry;
-  
-  rc += mds_message_marshal_size(&received);
-  
-  foreach_hash_table_entry (reg_table, i, entry)
-    {
-      char* command = (char*)(void*)(entry->key);
-      size_t len = strlen(command) + 1;
-      client_list_t* list = (client_list_t*)(void*)(entry->value);
-      
-      rc += len + sizeof(size_t) + client_list_marshal_size(list);
-    }
-  
-  return rc;
-}
-
-
-/**
- * Marshal server implementation specific data into a buffer
- * 
- * @param   state_buf  The buffer for the marshalled data
- * @return             Non-zero on error
- */
-int marshal_server(char* state_buf)
-{
-  size_t i, n = mds_message_marshal_size(&received);
-  hash_entry_t* entry;
-  
-  buf_set_next(state_buf, int, MDS_REGISTRY_VARS_VERSION);
-  buf_set_next(state_buf, int, connected);
-  buf_set_next(state_buf, int32_t, message_id);
-  buf_set_next(state_buf, size_t, n);
-  mds_message_marshal(&received, state_buf);
-  state_buf += n / sizeof(char);
-  
-  buf_set_next(state_buf, size_t, reg_table.capacity);
-  buf_set_next(state_buf, size_t, reg_table.size);
-  foreach_hash_table_entry (reg_table, i, entry)
-    {
-      char* command = (char*)(void*)(entry->key);
-      size_t len = strlen(command) + 1;
-      client_list_t* list = (client_list_t*)(void*)(entry->value);
-      
-      memcpy(state_buf, command, len * sizeof(char));
-      state_buf += len;
-      
-      n = client_list_marshal_size(list);
-      buf_set_next(state_buf, size_t, n);
-      client_list_marshal(list, state_buf);
-      state_buf += n / sizeof(char);
-    }
-  
-  hash_table_destroy(&reg_table, (free_func*)reg_table_free_key, (free_func*)reg_table_free_value);
-  mds_message_destroy(&received);
-  return 0;
-}
-
-
-/**
- * Unmarshal server implementation specific data and update the servers state accordingly
- * 
- * On critical failure the program should `abort()` or exit by other means.
- * That is, do not let `reexec_failure_recover` run successfully, if it unrecoverable
- * error has occurred or one severe enough that it is better to simply respawn.
- * 
- * @param   state_buf  The marshalled data that as not been read already
- * @return             Non-zero on error
- */
-int unmarshal_server(char* state_buf)
-{
-  char* command;
-  client_list_t* list;
-  size_t i, n, m;
-  int stage = 0;
-  
-  /* buf_get_next(state_buf, int, MDS_REGISTRY_VARS_VERSION); */
-  buf_next(state_buf, int, 1);
-  buf_get_next(state_buf, int, connected);
-  buf_get_next(state_buf, int32_t, message_id);
-  buf_get_next(state_buf, size_t, n);
-  fail_if (mds_message_unmarshal(&received, state_buf));
-  state_buf += n / sizeof(char);
-  stage = 1;
-  
-  buf_get_next(state_buf, size_t, n);
-  fail_if (hash_table_create_tuned(&reg_table, n));
-  buf_get_next(state_buf, size_t, n);
-  for (i = 0; i < n; i++)
-    {
-      stage = 1;
-      fail_if ((command = strdup(state_buf)) == NULL);
-      state_buf += strlen(command) + 1;
-      
-      stage = 2;
-      fail_if ((list = malloc(sizeof(client_list_t))) == NULL);
-      buf_get_next(state_buf, size_t, m);
-      stage = 3;
-      fail_if (client_list_unmarshal(list, state_buf));
-      state_buf += m / sizeof(char);
-      
-      hash_table_put(&reg_table, (size_t)(void*)command, (size_t)(void*)list);
-      fail_if (errno);
-    }
-  
-  reg_table.key_comparator = (compare_func*)string_comparator;
-  reg_table.hasher = (hash_func*)string_hash;
-  
-  return 0;
- pfail:
-  perror(*argv);
-  mds_message_destroy(&received);
-  if (stage >= 1)
-    hash_table_destroy(&reg_table, (free_func*)reg_table_free_key, (free_func*)reg_table_free_value);
-  if (stage >= 2)
-    free(command);
-  if (stage >= 3)
-    {
-      client_list_destroy(list);
-      free(list);
-    }
-  abort();
-  return -1;
-}
-
-
-/**
- * Attempt to recover from a re-exec failure that has been
- * detected after the server successfully updated it execution image
- * 
- * @return  Non-zero on error
- */
-int __attribute__((const)) reexec_failure_recover(void)
-{
-  return -1;
-}
-
-
-/**
- * Perform the server's mission
- * 
- * @return  Non-zero on error
- */
-int master_loop(void)
-{
-  int rc = 1;
-  
-  while (!reexecing && !terminating)
-    {
-      int r = mds_message_read(&received, socket_fd);
-      if (r == 0)
-	{
-	  r = handle_message();
-	  if (r == 0)
-	    continue;
-	}
-      
-      if (r == -2)
-	{
-	  eprint("corrupt message received, aborting.");
-	  goto fail;
-	}
-      else if (errno == EINTR)
-	continue;
-      else if (errno != ECONNRESET)
-	goto pfail;
-      
-      eprint("lost connection to server.");
-      mds_message_destroy(&received);
-      mds_message_initialise(&received);
-      connected = 0;
-      if (reconnect_to_display())
-	goto fail;
-      connected = 1;
-    }
-  
-  rc = 0;
-  goto fail;
- pfail:
-  perror(*argv);
- fail:
-  if (rc || !reexecing)
-    {
-      hash_table_destroy(&reg_table, (free_func*)reg_table_free_key, (free_func*)reg_table_free_value);
-      mds_message_destroy(&received);
-    }
-  pthread_mutex_destroy(&reg_mutex);
-  pthread_cond_destroy(&reg_cond);
-  free(send_buffer);
-  return rc;
-}
-
-
-/**
- * Handle the received message containing ‘Command: register’-header–value
- * 
- * @return  Zero on success -1 on error or interruption,
- *          errno will be set accordingly
- */
-static int handle_register_message(void)
-{
-  const char* recv_client_id = NULL;
-  const char* recv_message_id = NULL;
-  const char* recv_length = NULL;
-  const char* recv_action = NULL;
-  size_t i, length = 0;
-  
-#define __get_header(storage, header)  \
-  (startswith(received.headers[i], header))  \
-    storage = received.headers[i] + strlen(header)
-  
-  for (i = 0; i < received.header_count; i++)
-    {
-      if      __get_header(recv_client_id,  "Client ID: ");
-      else if __get_header(recv_message_id, "Message ID: ");
-      else if __get_header(recv_length,     "Length: ");
-      else if __get_header(recv_action,     "Action: ");
-      else
-	continue;
-      if (recv_client_id && recv_message_id && recv_length && recv_action)
-	break;
-    }
-  
-#undef __get_header
-  
-  
-  if ((recv_client_id == NULL) || (strequals(recv_client_id, "0:0")))
-    {
-      eprint("received message from anonymous sender, ignoring.");
-      return 0;
-    }
-  else if (strchr(recv_client_id, ':') == NULL)
-    {
-      eprint("received message from sender without a colon it its ID, ignoring, invalid ID.");
-      return 0;
-    }
-  else if ((recv_length == NULL) && ((recv_action == NULL) || !strequals(recv_action, "list")))
-    {
-      eprint("received empty message without `Action: list`, ignoring, has no effect.");
-      return 0;
-    }
-  else if (recv_message_id == NULL)
-    {
-      eprint("received message with ID, ignoring, master server is misbehaving.");
-      return 0;
-    }
-  
-  
-  if (recv_length != NULL)
-    length = (size_t)atoll(recv_length);
-  if (recv_action != NULL)
-    recv_action = "add";
-  
-#define __registry_action(action)  registry_action(length, action, recv_client_id, recv_message_id)
-  
-  if      (strequals(recv_action, "add"))     return __registry_action(1);
-  else if (strequals(recv_action, "remove"))  return __registry_action(-1);
-  else if (strequals(recv_action, "wait"))    return __registry_action(0);
-  else if (strequals(recv_action, "list"))    return list_registry(recv_client_id, recv_message_id);
-  else
-    {
-      eprint("received invalid action, ignoring.");
-      return 0;
-    }
-  
-#undef __registry_action
-}
-
-
-/**
- * Handle the received message containing a ‘Client closed’-header
- * 
- * @return  Zero on success -1 on error or interruption,
- *          errno will be set accordingly
- */
-static int handle_close_message(void)
-{
-  /* Servers do not close too often, there is no need to
-     optimise this with another hash table. */
-  
-  size_t i, j, ptr = 0, size = 1;
-  size_t* keys = NULL;
-  size_t* old_keys;
-  
-  fail_if ((errno = pthread_mutex_lock(&reg_mutex)));
-  
-  for (i = 0; i < received.header_count; i++)
-    if (startswith(received.headers[i], "Client closed: "))
-      {
-	uint64_t client = parse_client_id(received.headers[i] + strlen("Client closed: "));
-	hash_entry_t* entry;
-	
-	foreach_hash_table_entry (reg_table, j, entry)
-	  {
-	    client_list_t* list = (client_list_t*)(void*)(entry->value);
-	    client_list_remove(list, client);
-	    if (list->size)
-	      continue;
-	    
-	    fail_if ((keys == NULL) && xmalloc(keys, size, size_t));
-	    if (ptr == size ? growalloc(old_keys, keys, size, size_t) : 0)
-	      goto fail;
-	    keys[ptr++] = entry->key;
-	  }
-      }
-  
-  for (i = 0; i < ptr; i++)
-    {
-      hash_entry_t* entry = hash_table_get_entry(&reg_table, keys[i]);
-      client_list_t* list = (client_list_t*)(void*)(entry->value);
-      char* command = (char*)(void*)(entry->key);
-      
-      hash_table_remove(&reg_table, entry->key);
-      
-      client_list_destroy(list);
-      free(list);
-      free(command);
-    }
-  
-  pthread_mutex_unlock(&reg_mutex);
-  
-  free(keys);
-  return 0;
- pfail:
-  perror(*argv);
- fail:
-  free(keys);
-  return -1;
-}
-
-
-/**
- * Handle the received message
- * 
- * @return  Zero on success -1 on error or interruption,
- *          errno will be set accordingly
- */
-int handle_message(void)
-{
-  size_t i;
-  for (i = 0; i < received.header_count; i++)
-    if (strequals(received.headers[i], "Command: register"))
-      return handle_register_message();
-  return handle_close_message();
-}
-
-
-/**
- * Convert a client ID string into a client ID integer
- * 
- * @param   str  The client ID string
- * @return       The client ID integer
- */
-uint64_t parse_client_id(const char* str)
-{
-  char client_words[22];
-  char* client_high;
-  char* client_low;
-  uint64_t client;
-  
-  strcpy(client_high = client_words, str);
-  client_low = rawmemchr(client_words, ':');
-  *client_low++ = '\0';
-  client = (uint64_t)atoll(client_high);
-  client <<= 32;
-  client |= (uint64_t)atoll(client_low);
-  
-  return client;
-}
-
-
-/**
- * Add a protocol to the registry
- * 
- * @param   has_key      Whether the command is already in the registry
- * @param   command      The command
- * @param   command_key  The address of `command`
- * @param   client       The ID of the client that implements the server-side of the protocol
- * @return               Non-zero on error
- */
-static int registry_action_add(int has_key, char* command, size_t command_key, uint64_t client)
-{
-  if (has_key)
-    {
-      size_t address = hash_table_get(&reg_table, command_key);
-      client_list_t* list = (client_list_t*)(void*)address;
-      if (client_list_add(list, client) < 0)
-	goto pfail;
-    }
-  else
-    {
-      client_list_t* list = malloc(sizeof(client_list_t));
-      void* address = list;
-      if (list == NULL)
-	goto pfail;
-      if ((command = strdup(command)) == NULL)
-	{
-	  free(list);
-	  goto pfail;
-	}
-      command_key = (size_t)(void*)command;
-      if (client_list_create(list, 1) ||
-	  client_list_add(list, client) ||
-	  (hash_table_put(&reg_table, command_key, (size_t)address) == 0))
-	{
-	  client_list_destroy(list);
-	  free(list);
-	  free(command);
-	  goto pfail;
-	}
-    }
-  
-  return 0;
- pfail:
-  perror(*argv);
-  return -1;
-}
-
-
-/**
- * Remove a protocol from the registry
- * 
- * @param   command_key  The address of a string that contains the command
- * @param   client       The ID of the client that implements the server-side of the protocol
- * @return               Non-zero on error
- */
-static void registry_action_remove(size_t command_key, uint64_t client)
-{
-  hash_entry_t* entry = hash_table_get_entry(&reg_table, command_key);
-  size_t address = entry->value;
-  client_list_t* list = (client_list_t*)(void*)address;
-  client_list_remove(list, client);
-  if (list->size == 0)
-    {
-      client_list_destroy(list);
-      free(list);
-      hash_table_remove(&reg_table, command_key);
-      reg_table_free_key(entry->key);
-    }
-}
-
-
-/**
- * Modify the protocol registry or list missing protocols
- * 
- * @param   command      The command
- * @param   action       -1 to remove command, +1 to add commands, 0 to
- *                       wait until the message commnds are registered
- * @param   client       The ID of the client that implements the server-side of the protocol
- * @param   wait_set     Table to fill with missing protocols if `action == 0`
- * @return               Non-zero on error
- */
-static int registry_action_act(char* command, int action, uint64_t client, hash_table_t* wait_set)
-{
-  size_t command_key = (size_t)(void*)command;
-  int has_key = hash_table_contains_key(&reg_table, command_key);
-  
-  if (action == 1)
-    {
-      if (registry_action_add(has_key, command, command_key, client))
-	return -1;
-    }
-  else if ((action == -1) && has_key)
-    registry_action_remove(command_key, client);
-  else if ((action == 0) && !has_key)
-    {
-      if ((command = strdup(command)) == NULL)
-	goto pfail_wait;
-      command_key = (size_t)(void*)command;
-      if (hash_table_put(wait_set, command_key, 1) == 0)
-	if (errno)
-	  {
-	    free(command);
-	    goto pfail_wait;
-	  }
-    }
-  
-  return 0;
- pfail_wait:
-  perror(*argv);
-  hash_table_destroy(wait_set, (free_func*)reg_table_free_key, NULL);
-  free(wait_set);
-  return -1;
-}
-
-
-/**
- * Perform an action over the registry
- * 
- * @param   length           The length of the received message
- * @param   action           -1 to remove command, +1 to add commands, 0 to
- *                           wait until the message commnds are registered
- * @param   recv_client_id   The ID of the client
- * @param   recv_message_id  The ID of the received message
- * @return                   Zero on success -1 on error or interruption,
- *                           errno will be set accordingly
- */
-int registry_action(size_t length, int action, const char* recv_client_id, const char* recv_message_id)
-{
-  char* payload = received.payload;
-  uint64_t client = action ? parse_client_id(recv_client_id) : 0;
-  hash_table_t* wait_set = NULL;
-  size_t begin;
-  
-  if (action == 0)
-    {
-      wait_set = malloc(sizeof(hash_table_t));
-      if (hash_table_create(wait_set))
-	{
-	  hash_table_destroy(wait_set, NULL, NULL);
-	  free(wait_set);
-	  goto pfail;
-	}
-      wait_set->key_comparator = (compare_func*)string_comparator;
-      wait_set->hasher = (hash_func*)string_hash;
-    }
-  
-  if (received.payload_size == length)
-    {
-      if (growalloc(old, received.payload, received.payload_size, char))
-	{
-	  if (wait_set != NULL)
-	    hash_table_destroy(wait_set, NULL, NULL), free(wait_set);
-	  return -1;
-	}
-      else
-	payload = received.payload;
-    }
-  
-  payload[length] = '\n';
-  
-  fail_if ((errno = pthread_mutex_lock(&reg_mutex)));
-  
-  for (begin = 0; begin < length;)
-    {
-      char* end = rawmemchr(payload + begin, '\n');
-      size_t len = (size_t)(end - payload) - begin - 1;
-      char* command = payload + begin;
-      
-      command[len] = '\0';
-      begin += len + 1;
-      
-      if (registry_action_act(command, action, client, wait_set))
-	goto fail_in_mutex;
-    }
-  
-  pthread_mutex_unlock(&reg_mutex);
-  
-  if (action == 0)
-    {
-      /* FIXME */
-    }
-  
-  return 0;
-  
-  
- pfail:
-  perror(*argv);
-  return -1;
- fail_in_mutex:
-  pthread_mutex_unlock(&reg_mutex);
-  return -1;
-}
-
-
-/**
- * Send a list of all registered commands to a client
- * 
- * @param   recv_client_id   The ID of the client
- * @param   recv_message_id  The ID of the received message
- * @return                   Zero on success -1 on error or interruption,
- *                           errno will be set accordingly
- */
-int list_registry(const char* recv_client_id, const char* recv_message_id)
-{
-  size_t ptr = 0, i;
-  hash_entry_t* entry;
-  
-  if (send_buffer_size == 0)
-    {
-      fail_if (xmalloc(send_buffer, 256, char));
-      send_buffer_size = 256;
-    }
-  
-  fail_if ((errno = pthread_mutex_lock(&reg_mutex)));
-  
-  foreach_hash_table_entry (reg_table, i, entry)
-    {
-      size_t key = entry->key;
-      char* command = (char*)(void*)key;
-      size_t len = strlen(command);
-      
-      while (ptr + len + 1 >= send_buffer_size)
-	if (growalloc(old, send_buffer, send_buffer_size, char))
-	  goto fail_in_mutex;
-      
-      memcpy(send_buffer + ptr, command, len * sizeof(char));
-      ptr += len;
-      send_buffer[ptr++] = '\n';
-    }
-  
-  i = strlen(recv_message_id) + strlen(recv_client_id) + 10 + 19;
-  i += strlen("To: %s\nIn response to: %s\nMessage ID: %" PRIi32 "\nLength: %" PRIu64 "\n\n");
-  
-  while (ptr + i >= send_buffer_size)
-    {
-      if (growalloc(old, send_buffer, send_buffer_size, char))
-	goto fail_in_mutex;
-    }
-  
-  sprintf(send_buffer + ptr, "To: %s\nIn response to: %s\nMessage ID: %" PRIi32 "\nLength: %" PRIu64 "\n\n",
-	  recv_message_id, recv_client_id, message_id, ptr);
-  
-  message_id = message_id == INT32_MAX ? 0 : (message_id + 1);
-  
-  pthread_mutex_unlock(&reg_mutex);
-  
-  if (full_send(send_buffer + ptr, strlen(send_buffer + ptr)))
-    return 1;
-  return full_send(send_buffer, ptr);
-  
-  
- fail_in_mutex:
-  pthread_mutex_unlock(&reg_mutex);
-  return -1;
-  
- pfail:
-  perror(*argv);
-  return -1;
-}
-
-
-/**
- * Free a key from a table
- * 
- * @param  obj  The key
- */
-void reg_table_free_key(size_t obj)
-{
-  char* command = (char*)(void*)obj;
-  free(command);
-}
-
-
-/**
- * Free a value from a table
- * 
- * @param  obj  The value
- */
-void reg_table_free_value(size_t obj)
-{
-  client_list_t* list = (client_list_t*)(void*)obj;
-  client_list_destroy(list);
-  free(list);
-}
-
-
-/**
- * Send a full message even if interrupted
- * 
- * @param   message  The message to send
- * @param   length   The length of the message
- * @return           Non-zero on success
- */
-int full_send(const char* message, size_t length)
-{
-  size_t sent;
-  
-  while (length > 0)
-    {
-      sent = send_message(socket_fd, message, length);
-      if (sent > length)
-	{
-	  eprint("Sent more of a message than exists in the message, aborting.");
-	  return -1;
-	}
-      else if ((sent < length) && (errno != EINTR))
-	{
-	  perror(*argv);
-	  return -1;
-	}
-      message += sent;
-      length -= sent;
-    }
-  return 0;
-}
-