/* $Id: deliver.c,v 1.8 2005/12/09 06:52:12 dm Exp $ */

/*
 *
 * Copyright (C) 2004 David Mazieres (dm@uun.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 2, 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 *
 */

#include "local.h"
#include <signal.h>
#include "getopt_long.h"

char *progname;
int truncfd = -1;
off_t truncpos;
char *deleteme;

static int opt_copy;
static int opt_norewind;
static char *tmp_path;
static struct stat tmp_sb;

static void
cleanup (void)
{
  struct stat sb;
  if (truncfd >= 0)
    ftruncate (truncfd, truncpos);
  if (tmp_path && !lstat (tmp_path, &sb)
      && tmp_sb.st_dev == sb.st_dev
      && tmp_sb.st_ino == sb.st_ino)
    unlink (tmp_path);
  tmp_path = NULL;
  if (deleteme)
    unlink (deleteme);
  if (!opt_norewind)
    lseek (0, 0, SEEK_SET);
}

static void
catch (int sig)
{
  exit (EX_TEMPFAIL);
}

static void
deliver (char **dv, int dc)
{
  int rfd;
  off_t pos = -1;

  if (!opt_norewind)
    lseek (0, 0, SEEK_SET);

  if (opt_copy || nocopymsg (stdin) < 0) {
    int wfd;
    initfile (&tmp_path, &wfd, &rfd, &tmp_sb);
    copymsg (wfd, stdin);
    close (wfd);
  }
  else {
    rfd = 0;
    pos = lseek (rfd, 0, SEEK_CUR);
    if (pos == -1) {
      perror ("lseek");
      exit (EX_OSERR);
    }
  }

  for (; dc-- > 0; dv++) {
    int res;
    if (!*dv)
      continue;
    if ((*dv)[strlen (*dv) - 1] == '/')
      res = deliver_maildir (*dv, rfd, pos == -1);
    else
      res = deliver_mbox (*dv, rfd, pos == -1);
    if (res)
      exit (res);
    if (dc > 0 && pos != -1 && lseek (rfd, pos, SEEK_CUR) == -1) {
      perror ("re-lseek");
      exit (EX_OSERR);
    }
  }
}

static void usage (void) __attribute__ ((noreturn));
static void
usage (void)
{
  fprintf (stderr, "usage: %s [--umask[=val]] mailbox [mailbox ...]\n",
	   progname);
  exit (EX_USAGE);
}

int
main (int argc, char **argv)
{
  struct option o[] = {
    { "version", no_argument, NULL, 'v' },
    { "umask", optional_argument, NULL, 'U' },
    { "copy", no_argument, NULL, 'C' },
    { "norewind", no_argument, NULL, 'N' },
    { "fcntl", no_argument, NULL, 'P' },
    { NULL, 0, NULL, 0 }
  };
  int opt_umask = 077;
  int c;

  progname = strrchr (argv[0], '/');
  if (progname)
    progname++;
  else
    progname = argv[0];

  while ((c = getopt_long (argc, argv, "+", o, NULL)) != -1)
    switch (c) {
    case 'v':
      version (progname, 1);
      exit (0);
      break;
    case 'C':
      opt_copy = 1;
      break;
    case 'N':
      opt_norewind = 1;
      break;
    case 'P':
      opt_fcntl = 1;
      break;
    case 'U':
      opt_umask = -1;
      if (optarg) {
	opt_umask = strtol (optarg, NULL, 0);
	if (opt_umask & ~0777)
	  usage ();
      }
      break;
    default:
      usage ();
      break;
    }
  
  if (optind >= argc)
    usage ();

  opt_from = getenv ("SENDER");

  atexit (cleanup);
  signal (SIGHUP, catch);
  signal (SIGINT, catch);
  signal (SIGTERM, catch);

  if (opt_umask != -1)
    umask (opt_umask);

  deliver (argv + optind, argc - optind);

  return 0;
}