Test transcript streams

* libmailutils/tests/.gitignore: Update.
* libmailutils/tests/xscript.at: New file.
* libmailutils/tests/xscript.c: New file.
* libmailutils/tests/Makefile.am: Add new files.
* libmailutils/tests/testsuite.at: Include new testcase.

@@ -39,3 +39,4 @@ vexp
 wicket
 wordwrap
 wsp
+xscript

@@ -73,7 +73,8 @@ noinst_PROGRAMS = \
  vexp\
  wicket\
  wordwrap\
- wsp
+ wsp\
+ xscript
 
 LDADD = ${MU_LIB_MAILUTILS}
 
@@ -169,7 +170,8 @@ TESTSUITE_AT = \
  wordwrap00.at\
  wordwrap01.at\
  wordwrap02.at\
- wordwrap03.at
+ wordwrap03.at\
+ xscript.at
 
 TESTSUITE = $(srcdir)/testsuite
 M4=m4

@@ -207,3 +207,5 @@ m4_include([mimehdr.at])
 m4_include([msgset.at])
 
 m4_include([globtest.at])
+
+m4_include([xscript.at])

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016-2017 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_BANNER([Transcript stream])
+AT_SETUP([Transcript stream])
+AT_KEYWORDS([stream xscript])
+AT_DATA([input],[first line
+second line
+login ty coon
+login "ty" "coon"
+pass guessme
+\s
+login ty coon
+login "ty" "coon"
+pass guessme
+\p
+GNU Mailutils is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License as
+\n
+published by the Free Software Foundation; either version 3, or (at
+your option) any later version.
+])
+
+AT_CHECK([xscript < input],
+[0],
+[0001: first line
+0002: second line
+0003: login ty coon
+0004: login "ty" "coon"
+0005: pass guessme
+// n
+0007: login ty coon
+0008: login "ty" "coon"
+0009: pass guessme
+// s
+0011: GNU Mailutils is free software; you can redistribute it and/or
+0012: modify it under the terms of the GNU General Public License as
+// p
+0014: published by the Free Software Foundation; either version 3, or (at
+0015: your option) any later version.
+],
+[C: first line
+S: 0001: first line
+C: second line
+S: 0002: second line
+C: login ty coon
+S: 0003: login ty coon
+C: login "ty" "coon"
+S: 0004: login "ty" "coon"
+C: pass guessme
+S: 0005: pass guessme
+C: \s
+S: // n
+C: login ty coon
+S: 0007: login ty "***"
+C: login "ty" "coon"
+S: 0008: login "ty" "***"
+C: PASS ***
+S: 0009: pass guessme
+C: \p
+S: (data...)
+C: (data...)
+S: // p
+C: published by the Free Software Foundation; either version 3, or (at
+S: 0014: published by the Free Software Foundation; either version 3, or (at
+C: your option) any later version.
+S: 0015: your option) any later version.
+])
+AT_CLEANUP

+/* GNU Mailutils -- a suite of utilities for electronic mail
+   Copyright (C) 2005, 2007, 2009-2012, 2014-2017 Free Software
+   Foundation, Inc.
+
+   GNU Mailutils 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, or (at your option)
+   any later version.
+
+   GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>. */
+
+/* A simple echo server for testing transcript streams.
+   Each input line is prefixed with the input line number and echoed on
+   stdout.
+   
+   Input starting with '\\' is a command request.  It must contain a string
+   consisting of one of the following letters:
+     n       toggle normal transcript mode;
+     s       toggle secure transcript mode (passwords are not displayed);
+     p       toggle payload transcript mode.
+     
+   Several letters can be passed in a single request, although that doesn't
+   have much sense.
+   
+   The server responds to the command request with a "// " followed by
+   the letters describing previous transcript mode.
+   
+   Transcript of the session goes to stderr.
+*/
+
+#include <mailutils/mailutils.h>
+
+mu_stream_t
+create_transcript (void)
+{
+  mu_stream_t iostr;
+  mu_stream_t xstr;
+  mu_stream_t dstr;
+  
+  mu_stdstream_setup (MU_STDSTREAM_RESET_NONE);
+  MU_ASSERT (mu_iostream_create (&iostr, mu_strin, mu_strout));
+  mu_stream_set_buffer (iostr, mu_buffer_line, 0);
+
+  MU_ASSERT (mu_dbgstream_create (&dstr, MU_DIAG_DEBUG));
+  
+  MU_ASSERT (mu_xscript_stream_create (&xstr, iostr, dstr, NULL));
+  mu_stream_unref (dstr);
+  mu_stream_unref (iostr);
+  return xstr;
+}
+
+static int
+xstream_setopt (mu_stream_t str, char const *buf)
+{
+  int flag = MU_XSCRIPT_NORMAL;
+  for (; *buf; buf++)
+    {
+      switch (*buf)
+	{
+	case 'n':
+	case 'N':
+	  flag |= MU_XSCRIPT_NORMAL;
+	  break;
+	case 's':
+	case 'S':
+	  flag |= MU_XSCRIPT_SECURE;
+	  break;
+	case 'p':
+	case 'P':
+	  flag |= MU_XSCRIPT_PAYLOAD;
+	  break;
+	case '\n':
+	  break;
+	default:
+	  mu_error ("unrecognized flag: %c", *buf);
+	  return -1;
+	}
+    }      
+  MU_ASSERT (mu_stream_ioctl (str, MU_IOCTL_XSCRIPTSTREAM,
+			      MU_IOCTL_XSCRIPTSTREAM_LEVEL, &flag));
+  mu_stream_printf (str, "// ");
+  if (flag == MU_XSCRIPT_NORMAL)
+    mu_stream_printf (str, "n");
+  else
+    {
+      if (flag & MU_XSCRIPT_SECURE)
+	mu_stream_printf (str, "s");
+      if (flag & MU_XSCRIPT_PAYLOAD)
+	mu_stream_printf (str, "p");
+    }
+  mu_stream_printf (str, "\n");
+  return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+  int rc;
+  char *buf = NULL;
+  size_t size = 0, n;
+  unsigned line = 0;
+  mu_stream_t str = create_transcript ();
+
+  while ((rc = mu_stream_getline (str, &buf, &size, &n)) == 0 && n > 0)
+    {
+      line++;
+      if (buf[0] == '\\')
+	{
+	  xstream_setopt (str, buf + 1);
+	  continue;
+	}
+      mu_stream_printf (str, "%04u: %s", line, buf);
+    }
+  mu_stream_destroy (&str);
+  exit (0);
+}
+
+