Added to the repository

+/* GNU Mailutils -- a suite of utilities for electronic mail
+   Copyright (C) 2003 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 2, 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, 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 <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <assert.h>
+#include <ctype.h>
+#include <string.h>
+#include <mailutils/mailutils.h>
+#include <mailutils/argcv.h>
+
+static void
+read_and_print (stream_t in, stream_t out)
+{
+  size_t size;
+  char buffer[128];
+  
+  while (stream_sequential_readline (in, buffer, sizeof (buffer), &size) == 0
+	 && size > 0)
+    {
+      stream_sequential_write (out, buffer, size);
+    }
+}
+
+int
+main (int argc, char *argv[])
+{
+  int rc;
+  stream_t stream, out;
+  int read_stdin = 0;
+  int i = 1;
+  char *cmdline;
+  int flags = MU_STREAM_READ;
+  
+  if (argc > 1 && strcmp (argv[i], "--stdin") == 0)
+    {
+      read_stdin = 1;
+      flags |= MU_STREAM_WRITE;
+      i++;
+    }
+  
+  if (i == argc)
+    {
+      fprintf (stderr, "Usage: %s [--stdin] progname [args]\n", argv[0]);
+      exit (1);
+    }
+
+  assert (argcv_string (argc - i, &argv[i], &cmdline) == 0);
+  if (read_stdin)
+    {
+      stream_t in;
+      assert (stdio_stream_create (&in, stdin, 0) == 0);
+      assert (stream_open (in) == 0);
+      rc = filter_prog_stream_create (&stream, cmdline, in);
+    }
+  else
+    rc = prog_stream_create (&stream, cmdline, flags);
+  if (rc)
+    {
+      fprintf (stderr, "%s: cannot create program filter stream: %s\n",
+	       argv[0], mu_strerror (rc));
+      exit (1);
+    }
+
+  rc = stream_open (stream);
+  if (rc)
+    {
+      fprintf (stderr, "%s: cannot open program filter stream: %s\n",
+	       argv[0], mu_strerror (rc));
+      exit (1);
+    }
+
+  assert (stdio_stream_create (&out, stdout, 0) == 0);
+  assert (rc == 0);
+  assert (stream_open (out) == 0);
+  
+  read_and_print (stream, out);
+  stream_close (stream);
+  stream_destroy (&stream, stream_get_owner (stream));
+  return 0;
+}