* assuan-connect.c: Move all except assuan_get_pid to...

* assuan-pipe-connect.c: this.
(assuan_pipe_disconnect): Removed.
(do_finish, do_deinit): New
(assuan_pipe_connect): and set them into the context.
* assuan-socket-connect.c: New.

* assuan-util.c (_assuan_log_sanitized_string): New.

* assuan-pipe-server.c (assuan_init_pipe_server): Factored most
code out to ...
(_assuan_new_context): new func.
(_assuan_release_context): New
* assuan-connect.c (assuan_pipe_connect): Use the new functions.

9 files changed, 546 insertions, 222 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index d12acee..a96c6c7 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,20 @@
+2002-01-21  Werner Koch  <wk@gnupg.org>
+
+	* assuan-connect.c: Move all except assuan_get_pid to...
+	* assuan-pipe-connect.c: this.
+	(assuan_pipe_disconnect): Removed.
+	(do_finish, do_deinit): New 
+	(assuan_pipe_connect): and set them into the context.
+	* assuan-socket-connect.c: New.
+	
+	* assuan-util.c (_assuan_log_sanitized_string): New.
+
+	* assuan-pipe-server.c (assuan_init_pipe_server): Factored most
+	code out to ...
+	(_assuan_new_context): new func.
+	(_assuan_release_context): New
+	* assuan-connect.c (assuan_pipe_connect): Use the new functions.
+
 2002-01-20  Werner Koch  <wk@gnupg.org>
 
 	* assuan.h: Added Invalid Option error code.
diff --git a/src/Makefile.am b/src/Makefile.am
index c4d117e..7508dce 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -39,7 +39,9 @@ libassuan_a_SOURCES = \
 	assuan-connect.c \
 	assuan-client.c \
 	assuan-pipe-server.c \
-	assuan-socket-server.c 
+	assuan-socket-server.c \
+	assuan-pipe-connect.c \
+	assuan-socket-connect.c 
 
 
 assuan-errors.c : assuan.h
diff --git a/src/assuan-connect.c b/src/assuan-connect.c
index 53b742f..49d4aac 100644
--- a/src/assuan-connect.c
+++ b/src/assuan-connect.c
@@ -33,208 +33,18 @@
 
 #include "assuan-defs.h"
 
-#ifdef _POSIX_OPEN_MAX
-#define MAX_OPEN_FDS _POSIX_OPEN_MAX
-#else
-#define MAX_OPEN_FDS 20
-#endif
-
-#ifdef HAVE_JNLIB_LOGGING
-#include "../jnlib/logging.h"
-#define LOGERROR1(a,b)   log_error ((a), (b))
-#else
-#define LOGERROR1(a,b)   fprintf (stderr, (a), (b))
-#endif
-
-
-
-static int
-writen ( int fd, const char *buffer, size_t length )
+/* Disconnect and release the context CTX. */
+void
+assuan_disconnect (ASSUAN_CONTEXT ctx)
 {
-  while (length)
+  if (ctx)
     {
-      int nwritten = write (fd, buffer, length);
-      
-      if (nwritten < 0)
-        {
-          if (errno == EINTR)
-            continue;
-          return -1; /* write error */
-        }
-      length -= nwritten;
-      buffer += nwritten;
+      assuan_write_line (ctx, "BYE");
+      ctx->finish_handler (ctx);
+      ctx->deinit_handler (ctx);
+      ctx->deinit_handler = NULL;
+      _assuan_release_context (ctx);
     }
-  return 0;  /* okay */
-}
-
-
-
-/* Connect to a server over a pipe, creating the assuan context and
-   returning it in CTX.  The server filename is NAME, the argument
-   vector in ARGV.  FD_CHILD_LIST is a -1 terminated list of file
-   descriptors not to close in the child.  */
-AssuanError
-assuan_pipe_connect (ASSUAN_CONTEXT *ctx, const char *name, char *const argv[],
-		     int *fd_child_list)
-{
-  static int fixed_signals = 0;
-  AssuanError err;
-  int rp[2];
-  int wp[2];
-  int fd[2];
-
-  if (!ctx || !name || !argv || !argv[0])
-    return ASSUAN_Invalid_Value;
-
-  if (!fixed_signals)
-    { 
-      struct sigaction act;
-        
-      sigaction (SIGPIPE, NULL, &act);
-      if (act.sa_handler == SIG_DFL)
-	{
-	  act.sa_handler = SIG_IGN;
-	  sigemptyset (&act.sa_mask);
-	  act.sa_flags = 0;
-	  sigaction (SIGPIPE, &act, NULL);
-        }
-      fixed_signals = 1;
-      /* FIXME: This is not MT safe */
-    }
-
-  if (pipe (rp) < 0)
-    return ASSUAN_General_Error;
-
-  if (pipe (wp) < 0)
-    {
-      close (rp[0]);
-      close (rp[1]);
-      return ASSUAN_General_Error;
-    }
-  
-  fd[0] = rp[0];  /* Our inbound is read end of read pipe.  */
-  fd[1] = wp[1];  /* Our outbound is write end of write pipe.  */
-
-  err = assuan_init_pipe_server (ctx, fd);  /* FIXME: Common code should be factored out.  */
-  if (err)
-    {
-      close (rp[0]);
-      close (rp[1]);
-      close (wp[0]);
-      close (wp[1]);
-      return err;
-    }
-  (*ctx)->is_server = 0;
-
-  (*ctx)->pid = fork ();
-  if ((*ctx)->pid < 0)
-    {
-      close (rp[0]);
-      close (rp[1]);
-      close (wp[0]);
-      close (wp[1]);
-      assuan_deinit_server (*ctx);  /* FIXME: Common code should be factored out.  */
-      return ASSUAN_General_Error;
-    }
-
-  if ((*ctx)->pid == 0)
-    {
-      int i, n;
-      char errbuf[512];
-#ifdef HAVE_JNLIB_LOGGING
-      int log_fd = log_get_fd (); 
-#endif
-      /* close all files which will not be duped but keep stderr
-         and log_stream for now */
-      n = sysconf (_SC_OPEN_MAX);
-      if (n < 0)
-        n = MAX_OPEN_FDS;
-      for (i=0; i < n; i++)
-        {
-	  int *fdp = fd_child_list;
-
-	  if (fdp)
-	    {
-	      while (*fdp != -1 && *fdp != i)
-		fdp++;
-	    }
-
-          if (!(fdp && *fdp != -1)
-	      && i != fileno (stderr) 
-#ifdef HAVE_JNLIB_LOGGING
-              && i != log_fd
-#endif
-              && i != rp[1] && i != wp[0])
-            close(i);
-        }
-      errno = 0;
-
-      /* Dup handles and to stdin/stdout and exec */
-      if (rp[1] != STDOUT_FILENO)
-        {
-          if (dup2 (rp[1], STDOUT_FILENO) == -1)
-            {
-              LOGERROR1 ("dup2 failed in child: %s\n", strerror (errno));
-              _exit (4);
-            }
-          close (rp[1]);
-        }
-      if (wp[0] != STDIN_FILENO)
-        {
-          if (dup2 (wp[0], STDIN_FILENO) == -1)
-            {
-              LOGERROR1 ("dup2 failed in child: %s\n", strerror (errno));
-              _exit (4);
-            }
-          close (wp[0]);
-        }
-
-      execv (name, argv); 
-      /* oops - use the pipe to tell the parent about it */
-      snprintf (errbuf, sizeof(errbuf)-1, "ERR %d can't exec `%s': %.50s\n",
-                ASSUAN_Problem_Starting_Server, name, strerror (errno));
-      errbuf[sizeof(errbuf)-1] = 0;
-      writen (1, errbuf, strlen (errbuf));
-      _exit (4);
-    }
-
-  close (rp[1]);
-  close (wp[0]);
-
-  /* initial handshake */
-  {
-    int okay, off;
-
-    err = _assuan_read_from_server (*ctx, &okay, &off);
-    if (err)
-      {
-        LOGERROR1 ("can't connect server: %s\n", assuan_strerror (err));
-      }
-    else if (okay != 1)
-      {
-        LOGERROR1 ("can't connect server: `%s'\n", (*ctx)->inbound.line);
-        err = ASSUAN_Connect_Failed;
-      }
-  }
-
-  if (err)
-    {
-      if ((*ctx)->pid != -1)
-        waitpid ((*ctx)->pid, NULL, 0);  /* FIXME Check return value.  */
-      assuan_deinit_server (*ctx);  /* FIXME: Common code should be factored out.  */
-    }
-
-  return err;
-}
-
-void
-assuan_pipe_disconnect (ASSUAN_CONTEXT ctx)
-{
-  assuan_write_line (ctx, "BYE");
-  close (ctx->inbound.fd);
-  close (ctx->outbound.fd);
-  waitpid (ctx->pid, NULL, 0);  /* FIXME Check return value.  */
-  assuan_deinit_server (ctx);
 }
 
 pid_t
@@ -242,5 +52,3 @@ assuan_get_pid (ASSUAN_CONTEXT ctx)
 {
   return ctx ? ctx->pid : -1;
 }
-
-
diff --git a/src/assuan-defs.h b/src/assuan-defs.h
index c14b409..7d55aab 100644
--- a/src/assuan-defs.h
+++ b/src/assuan-defs.h
@@ -73,7 +73,8 @@ struct assuan_context_s {
 
   int pipe_mode;  /* We are in pipe mode, i.e. we can handle just one
                      connection and must terminate then */
-  pid_t pid;	  /* In pipe mode, the pid of the child server process.  */
+  pid_t pid;	  /* In pipe mode, the pid of the child server process.  
+                     In socket mode, the pid of the server */
   int listen_fd;  /* The fd we are listening on (used by socket servers) */
 
   void (*deinit_handler)(ASSUAN_CONTEXT);  
@@ -98,6 +99,11 @@ struct assuan_context_s {
 };
 
 
+/*-- assuan-pipe-server.c --*/
+int _assuan_new_context (ASSUAN_CONTEXT *r_ctx);
+void _assuan_release_context (ASSUAN_CONTEXT ctx);
+
+
 /*-- assuan-handler.c --*/
 int _assuan_register_std_commands (ASSUAN_CONTEXT ctx);
 
@@ -124,6 +130,7 @@ void  _assuan_free (void *p);
 #define set_error(c,e,t) assuan_set_error ((c), ASSUAN_ ## e, (t))
 
 void _assuan_log_print_buffer (FILE *fp, const void *buffer, size_t  length);
+void _assuan_log_sanitized_string (const char *string);
 
 
 #endif /*ASSUAN_DEFS_H*/
diff --git a/src/assuan-pipe-connect.c b/src/assuan-pipe-connect.c
new file mode 100644
index 0000000..ccfc1f0
--- /dev/null
+++ b/src/assuan-pipe-connect.c
@@ -0,0 +1,269 @@
+/* assuan-pipe-connect.c - Establish a pipe connection (client) 
+ *	Copyright (C) 2001 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "assuan-defs.h"
+
+#ifdef _POSIX_OPEN_MAX
+#define MAX_OPEN_FDS _POSIX_OPEN_MAX
+#else
+#define MAX_OPEN_FDS 20
+#endif
+
+#ifdef HAVE_JNLIB_LOGGING
+#include "../jnlib/logging.h"
+#define LOGERROR1(a,b)   log_error ((a), (b))
+#else
+#define LOGERROR1(a,b)   fprintf (stderr, (a), (b))
+#endif
+
+
+
+static int
+writen ( int fd, const char *buffer, size_t length )
+{
+  while (length)
+    {
+      int nwritten = write (fd, buffer, length);
+      
+      if (nwritten < 0)
+        {
+          if (errno == EINTR)
+            continue;
+          return -1; /* write error */
+        }
+      length -= nwritten;
+      buffer += nwritten;
+    }
+  return 0;  /* okay */
+}
+
+
+static int
+do_finish (ASSUAN_CONTEXT ctx)
+{
+  if (ctx->inbound.fd != -1)
+    {
+      close (ctx->inbound.fd);
+      ctx->inbound.fd = -1;
+    }
+  if (ctx->outbound.fd != -1)
+    {
+      close (ctx->outbound.fd);
+      ctx->outbound.fd = -1;
+    }
+  if (ctx->pid != -1)
+    {
+      waitpid (ctx->pid, NULL, 0);  /* FIXME Check return value.  */
+      ctx->pid = -1;
+    }
+  return 0;
+}
+
+static void
+do_deinit (ASSUAN_CONTEXT ctx)
+{
+  do_finish (ctx);
+}
+
+
+
+/* Connect to a server over a pipe, creating the assuan context and
+   returning it in CTX.  The server filename is NAME, the argument
+   vector in ARGV.  FD_CHILD_LIST is a -1 terminated list of file
+   descriptors not to close in the child.  */
+AssuanError
+assuan_pipe_connect (ASSUAN_CONTEXT *ctx, const char *name, char *const argv[],
+		     int *fd_child_list)
+{
+  static int fixed_signals = 0;
+  AssuanError err;
+  int rp[2];
+  int wp[2];
+
+  if (!ctx || !name || !argv || !argv[0])
+    return ASSUAN_Invalid_Value;
+
+  if (!fixed_signals)
+    { 
+      struct sigaction act;
+        
+      sigaction (SIGPIPE, NULL, &act);
+      if (act.sa_handler == SIG_DFL)
+	{
+	  act.sa_handler = SIG_IGN;
+	  sigemptyset (&act.sa_mask);
+	  act.sa_flags = 0;
+	  sigaction (SIGPIPE, &act, NULL);
+        }
+      fixed_signals = 1;
+      /* FIXME: This is not MT safe */
+    }
+
+  if (pipe (rp) < 0)
+    return ASSUAN_General_Error;
+
+  if (pipe (wp) < 0)
+    {
+      close (rp[0]);
+      close (rp[1]);
+      return ASSUAN_General_Error;
+    }
+  
+  err = _assuan_new_context (ctx);
+  if (err)
+    {
+      close (rp[0]);
+      close (rp[1]);
+      close (wp[0]);
+      close (wp[1]);
+      return err;
+    }
+  (*ctx)->pipe_mode = 1;
+  (*ctx)->inbound.fd  = rp[0];  /* Our inbound is read end of read pipe. */
+  (*ctx)->outbound.fd = wp[1];  /* Our outbound is write end of write pipe. */
+  (*ctx)->deinit_handler = do_deinit;
+  (*ctx)->finish_handler = do_finish;
+
+  (*ctx)->pid = fork ();
+  if ((*ctx)->pid < 0)
+    {
+      close (rp[0]);
+      close (rp[1]);
+      close (wp[0]);
+      close (wp[1]);
+      _assuan_release_context (*ctx); 
+      return ASSUAN_General_Error;
+    }
+
+  if ((*ctx)->pid == 0)
+    {
+      int i, n;
+      char errbuf[512];
+#ifdef HAVE_JNLIB_LOGGING
+      int log_fd = log_get_fd (); 
+#endif
+      /* close all files which will not be duped but keep stderr
+         and log_stream for now */
+      n = sysconf (_SC_OPEN_MAX);
+      if (n < 0)
+        n = MAX_OPEN_FDS;
+      for (i=0; i < n; i++)
+        {
+	  int *fdp = fd_child_list;
+
+	  if (fdp)
+	    {
+	      while (*fdp != -1 && *fdp != i)
+		fdp++;
+	    }
+
+          if (!(fdp && *fdp != -1)
+	      && i != fileno (stderr) 
+#ifdef HAVE_JNLIB_LOGGING
+              && i != log_fd
+#endif
+              && i != rp[1] && i != wp[0])
+            close(i);
+        }
+      errno = 0;
+
+      /* Dup handles and to stdin/stdout and exec */
+      if (rp[1] != STDOUT_FILENO)
+        {
+          if (dup2 (rp[1], STDOUT_FILENO) == -1)
+            {
+              LOGERROR1 ("dup2 failed in child: %s\n", strerror (errno));
+              _exit (4);
+            }
+          close (rp[1]);
+        }
+      if (wp[0] != STDIN_FILENO)
+        {
+          if (dup2 (wp[0], STDIN_FILENO) == -1)
+            {
+              LOGERROR1 ("dup2 failed in child: %s\n", strerror (errno));
+              _exit (4);
+            }
+          close (wp[0]);
+        }
+
+      execv (name, argv); 
+      /* oops - use the pipe to tell the parent about it */
+      snprintf (errbuf, sizeof(errbuf)-1, "ERR %d can't exec `%s': %.50s\n",
+                ASSUAN_Problem_Starting_Server, name, strerror (errno));
+      errbuf[sizeof(errbuf)-1] = 0;
+      writen (1, errbuf, strlen (errbuf));
+      _exit (4);
+    }
+
+  close (rp[1]);
+  close (wp[0]);
+
+  /* initial handshake */
+  {
+    int okay, off;
+
+    err = _assuan_read_from_server (*ctx, &okay, &off);
+    if (err)
+      {
+        LOGERROR1 ("can't connect server: %s\n", assuan_strerror (err));
+      }
+    else if (okay != 1)
+      {
+        LOGERROR1 ("can't connect server: `%s'\n", (*ctx)->inbound.line);
+        err = ASSUAN_Connect_Failed;
+      }
+  }
+
+  if (err)
+    {
+      assuan_disconnect (*ctx);
+      *ctx = NULL;
+    }
+
+  return err;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/src/assuan-pipe-server.c b/src/assuan-pipe-server.c
index c283a92..d15f54f 100644
--- a/src/assuan-pipe-server.c
+++ b/src/assuan-pipe-server.c
@@ -45,8 +45,10 @@ finish_connection (ASSUAN_CONTEXT ctx)
 }
 
 
+/* Create a new context.  Note that the handlers are set up for a pipe
+   server/client - this wau we don't need extra dummy functions */
 int
-assuan_init_pipe_server (ASSUAN_CONTEXT *r_ctx, int filedes[2])
+_assuan_new_context (ASSUAN_CONTEXT *r_ctx)
 {
   ASSUAN_CONTEXT ctx;
   int rc;
@@ -55,15 +57,14 @@ assuan_init_pipe_server (ASSUAN_CONTEXT *r_ctx, int filedes[2])
   ctx = xtrycalloc (1, sizeof *ctx);
   if (!ctx)
     return ASSUAN_Out_Of_Core;
-  ctx->is_server = 1;
   ctx->input_fd = -1;
   ctx->output_fd = -1;
 
-  ctx->inbound.fd = filedes[0];
-  ctx->outbound.fd = filedes[1];
+  ctx->inbound.fd = -1;
+  ctx->outbound.fd = -1;
 
-  ctx->pipe_mode = 1;
   ctx->listen_fd = -1;
+  /* use the pipe server handler as a default */
   ctx->deinit_handler = deinit_pipe_server;
   ctx->accept_handler = accept_connection;
   ctx->finish_handler = finish_connection;
@@ -77,6 +78,37 @@ assuan_init_pipe_server (ASSUAN_CONTEXT *r_ctx, int filedes[2])
 }
 
 
+
+int
+assuan_init_pipe_server (ASSUAN_CONTEXT *r_ctx, int filedes[2])
+{
+  int rc;
+
+  rc = _assuan_new_context (r_ctx);
+  if (!rc)
+    {
+      ASSUAN_CONTEXT ctx = *r_ctx;
+
+      ctx->is_server = 1;
+      ctx->inbound.fd = filedes[0];
+      ctx->outbound.fd = filedes[1];
+      ctx->pipe_mode = 1;
+    }
+  return rc;
+}
+
+
+void
+_assuan_release_context (ASSUAN_CONTEXT ctx)
+{
+  if (ctx)
+    {
+      xfree (ctx->hello_line);
+      xfree (ctx->okay_line);
+      xfree (ctx);
+    }
+}
+
 void
 assuan_deinit_server (ASSUAN_CONTEXT ctx)
 {
@@ -86,16 +118,6 @@ assuan_deinit_server (ASSUAN_CONTEXT ctx)
          when not needed but still allow for a generic deinit function */
       ctx->deinit_handler (ctx);
       ctx->deinit_handler = NULL;
-      xfree (ctx->hello_line);
-      xfree (ctx->okay_line);
-      xfree (ctx);
+      _assuan_release_context (ctx);
     }
 }
-
-
-
-
-
-
-
-
diff --git a/src/assuan-socket-connect.c b/src/assuan-socket-connect.c
new file mode 100644
index 0000000..9cdefdf
--- /dev/null
+++ b/src/assuan-socket-connect.c
@@ -0,0 +1,150 @@
+/* assuan-socket-connect.c - Assuan socket based client
+ *	Copyright (C) 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+#include "assuan-defs.h"
+
+#ifdef HAVE_JNLIB_LOGGING
+#include "../jnlib/logging.h"
+#define LOGERROR(a)      log_error ((a))
+#define LOGERROR1(a,b)   log_error ((a), (b))
+#define LOGERROR2(a,b,c) log_error ((a), (b), (c))
+#define LOGERRORX(a)     log_printf ((a))
+#else
+#define LOGERROR(a)      fprintf (stderr, (a))
+#define LOGERROR1(a,b)   fprintf (stderr, (a), (b))
+#define LOGERROR2(a,b,c) fprintf (stderr, (a), (b), (c))
+#define LOGERRORX(a)     fputs (stderr, (a))
+#endif
+
+
+
+static int
+do_finish (ASSUAN_CONTEXT ctx)
+{
+  if (ctx->inbound.fd != -1)
+    {
+      close (ctx->inbound.fd);
+    }
+  ctx->inbound.fd = -1;
+  ctx->outbound.fd = -1;
+  return 0;
+}
+
+static void
+do_deinit (ASSUAN_CONTEXT ctx)
+{
+  do_finish (ctx);
+}
+
+
+
+/* Make a connection to the Unix domain socket NAME and return a new
+   Assuan context in CTX.  SERVER_PID is currently not used but may
+   becode handy in future. */
+AssuanError
+assuan_socket_connect (ASSUAN_CONTEXT *r_ctx,
+                       const char *name, pid_t server_pid)
+{
+  AssuanError err;
+  ASSUAN_CONTEXT ctx;
+  int fd;
+  struct sockaddr_un srvr_addr;
+  size_t len;
+
+  if (!r_ctx || !name)
+    return ASSUAN_Invalid_Value;
+  *r_ctx = NULL;
+
+  /* we require that the name starts with a slash, so that we can
+     alter reuse this function for other socket types */
+  if (*name != '/')
+    return ASSUAN_Invalid_Value;
+  if (strlen (name)+1 >= sizeof srvr_addr.sun_path)
+    return ASSUAN_Invalid_Value;
+
+  err = _assuan_new_context (&ctx); 
+  if (err)
+      return err;
+  ctx->pid = server_pid; /* save it in case we need it later */
+  ctx->deinit_handler = do_deinit;
+  ctx->finish_handler = do_finish;
+
+  fd = socket (AF_UNIX, SOCK_STREAM, 0);
+  if (fd == -1)
+    {
+      LOGERROR1 ("can't create socket: %s\n", strerror (errno));
+      _assuan_release_context (ctx);
+      return ASSUAN_General_Error;
+    }
+    
+  memset (&srvr_addr, 0, sizeof srvr_addr );
+  srvr_addr.sun_family = AF_UNIX;
+  strcpy (srvr_addr.sun_path, name);
+  len = (offsetof (struct sockaddr_un, sun_path)
+         + strlen (srvr_addr.sun_path) + 1);
+    
+  if (connect (fd, (struct sockaddr*)&srvr_addr, len) == -1)
+    {
+      LOGERROR2 ("can't connect to `%s': %s\n", name, strerror (errno));
+      _assuan_release_context (ctx);
+      close (fd );
+      return ASSUAN_Connect_Failed;
+    }
+
+  ctx->inbound.fd = fd;
+  ctx->outbound.fd = fd;
+
+  /* initial handshake */
+  {
+    int okay, off;
+
+    err = _assuan_read_from_server (ctx, &okay, &off);
+    if (err)
+      {
+        LOGERROR1 ("can't connect server: %s\n", assuan_strerror (err));
+      }
+    else if (okay != 1)
+      {
+        LOGERROR ("can't connect server: `");
+        _assuan_log_sanitized_string (ctx->inbound.line);
+        LOGERRORX ("'\n");
+        err = ASSUAN_Connect_Failed;
+      }
+  }
+
+  if (err)
+    {
+      assuan_disconnect (ctx); 
+    }
+  else
+    *r_ctx = ctx;
+  return 0;
+}
+
+
diff --git a/src/assuan-util.c b/src/assuan-util.c
index 96cd68d..4153ef8 100644
--- a/src/assuan-util.c
+++ b/src/assuan-util.c
@@ -25,6 +25,10 @@
 
 #include "assuan-defs.h"
 
+#ifdef HAVE_JNLIB_LOGGING
+#include "../jnlib/logging.h"
+#endif
+
 
 static void *(*alloc_func)(size_t n) = malloc;
 static void *(*realloc_func)(void *p, size_t n) = realloc;
@@ -150,3 +154,43 @@ _assuan_log_print_buffer (FILE *fp, const void *buffer, size_t length)
       putc (']', fp);
     }
 }
+
+
+/* print a user supplied string after filtering out potential bad
+   characters*/
+void
+_assuan_log_sanitized_string (const char *string)
+{
+  const unsigned char *s = string;
+#ifdef HAVE_JNLIB_LOGGING
+  FILE *fp = log_get_stream ();
+#else
+  FILE *fp = stderr;
+#endif
+
+  for (; *s; s++)
+    {
+      if (*s < 0x20 || (*s >= 0x7f && *s <= 0xa0))
+        {
+          putc ('\\', fp);
+          if (*s == '\n')
+            putc ('n', fp);
+          else if (*s == '\r')
+            putc ('r', fp);
+          else if (*s == '\f')
+            putc ('f', fp);
+          else if (*s == '\v')
+            putc ('v', fp);
+          else if (*s == '\b')
+            putc ('b', fp);
+          else if (!*s)
+            putc ('0', fp);
+          else
+            fprintf (fp, "x%02x", *s );
+	}
+      else
+        putc (*s, fp);
+    }
+}
+
+
diff --git a/src/assuan.h b/src/assuan.h
index 31d6fbd..5971d81 100644
--- a/src/assuan.h
+++ b/src/assuan.h
@@ -1,5 +1,5 @@
 /* assuan.c - Definitions for the Assuna protocol
- *	Copyright (C) 2001 Free Software Foundation, Inc.
+ *	Copyright (C) 2001, 2002 Free Software Foundation, Inc.
  *
  * This file is part of GnuPG.
  *
@@ -160,10 +160,15 @@ void assuan_deinit_server (ASSUAN_CONTEXT ctx);
 int assuan_init_socket_server (ASSUAN_CONTEXT *r_ctx, int listen_fd);
 
 
-/*-- assuan-connect.c --*/
+/*-- assuan-pipe-connect.c --*/
 AssuanError assuan_pipe_connect (ASSUAN_CONTEXT *ctx, const char *name,
                                  char *const argv[], int *fd_child_list);
-void assuan_pipe_disconnect (ASSUAN_CONTEXT ctx);
+/*-- assuan-socket-connect.c --*/
+AssuanError assuan_socket_connect (ASSUAN_CONTEXT *ctx, const char *name,
+                                   pid_t server_pid);
+
+/*-- assuan-connect.c --*/
+void assuan_disconnect (ASSUAN_CONTEXT ctx);
 pid_t assuan_get_pid (ASSUAN_CONTEXT ctx);
 
 /*-- assuan-client.c --*/