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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2003-2025 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/>. */
/* MH mhl command */
#include <mh.h>
#include <sys/stat.h>
#include <unistd.h>
static char prog_doc[] = N_("Produce formatted listings of MH messages");
static char args_doc[] = N_("[FILE [FILE...]]");
static int bell_option;
static int clear_option;
static int interactive; /* Using interactive output */
static int mhl_fmt_flags; /* MHL format flags. Controlled by -bell
and -clear */
static int length = 40; /* Length of output page */
static int width = 80; /* Width of output page */
static char *formfile = MHLIBDIR "/mhl.format";
static const char *moreproc;
static int nomoreproc;
static mu_list_t format;
static struct mu_option options[] = {
{ "bell", 0, NULL, MU_OPTION_DEFAULT,
N_("ring the bell at the end of each output page"),
mu_c_bool, &bell_option },
{ "clear", 0, NULL, MU_OPTION_DEFAULT,
N_("clear the screen after each page of output"),
mu_c_bool, &clear_option },
{ "form", 0, N_("FILE"), MU_OPTION_DEFAULT,
N_("read format from given file"),
mu_c_string, &formfile, mh_opt_find_file },
{ "width", 0, N_("NUMBER"), MU_OPTION_DEFAULT,
N_("set output width"),
mu_c_int, &width },
{ "length", 0, N_("NUMBER"), MU_OPTION_DEFAULT,
N_("set output screen length"),
mu_c_int, &length },
{ "moreproc", 0, N_("PROG"), MU_OPTION_DEFAULT,
N_("use given PROG instead of the default"),
mu_c_string, &moreproc },
{ "nomoreproc", 0, NULL, MU_OPTION_DEFAULT,
N_("disable use of moreproc program"),
mu_c_bool, &nomoreproc },
MU_OPTION_END
};
static mu_stream_t
open_output ()
{
int rc;
mu_stream_t output;
if (interactive && !nomoreproc)
{
if (!moreproc || !moreproc[0])
moreproc = mh_global_profile_get ("moreproc", getenv ("PAGER"));
}
else
moreproc = NULL;
if (moreproc)
rc = mu_command_stream_create (&output, moreproc, MU_STREAM_WRITE);
else
{
rc = 0;
output = mu_strout;
mu_stream_ref (output);
}
if (rc)
{
mu_error (_("cannot create output stream: %s"), mu_strerror (rc));
exit (1);
}
return output;
}
static void
list_message (char *name, mu_stream_t output)
{
int rc;
mu_stream_t input;
mu_message_t msg;
if (!name)
{
rc = 0;
input = mu_strin;
mu_stream_ref (input);
}
else
rc = mu_file_stream_create (&input, name, MU_STREAM_READ);
if (rc)
{
mu_error (_("cannot create input stream: %s"), mu_strerror (rc));
return;
}
msg = mh_stream_to_message (input);
if (!msg)
{
mu_error (_("input stream %s is not a message (%s)"),
name, mu_strerror (rc));
mu_stream_close (input);
mu_stream_destroy (&input);
}
else
{
mhl_format_run (format, width, length, mhl_fmt_flags, msg, output);
mu_message_unref (msg);
}
}
int
main (int argc, char **argv)
{
mu_stream_t output;
interactive = isatty (1) && isatty (0);
mh_getopt (&argc, &argv, options, MH_GETOPT_DEFAULT_FOLDER,
args_doc, prog_doc, NULL);
if (bell_option == -1)
/* use default */;
else if (bell_option)
mhl_fmt_flags |= MHL_BELL;
else
mhl_fmt_flags &= ~MHL_BELL;
if (clear_option == -1)
/* use default */;
else if (clear_option)
mhl_fmt_flags |= MHL_CLEARSCREEN;
else
mhl_fmt_flags &= ~MHL_CLEARSCREEN;
format = mhl_format_compile (formfile);
if (!format)
exit (1);
if (argc == 0)
nomoreproc = 1;
if (!interactive)
mhl_fmt_flags &= ~MHL_BELL;
output = open_output ();
if (argc == 0)
list_message (NULL, output);
else
while (argc--)
list_message (*argv++, output);
mu_stream_close (output);
return 0;
}
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