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/* Hurd unionfs
Copyright (C) 2001, 2002, 2005 Free Software Foundation, Inc.
Written by Moritz Schulte <moritz@duesseldorf.ccc.de>.
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 of the
License, 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. */
#define _GNU_SOURCE
#include <hurd/netfs.h>
#include <argp.h>
#include <argz.h>
#include <error.h>
#include <fcntl.h>
#include <sys/types.h>
#include <unistd.h>
#include "version.h"
#include "unionfs.h"
#include "ncache.h"
#include "ulfs.h"
#include "lnode.h"
#include "node.h"
#include "options.h"
#include "stow.h"
#include "update.h"
char *netfs_server_name = "unionfs";
char *netfs_server_version = HURD_VERSION;
/* Not really needed, since unionfs doesn't manage symlinks. */
int netfs_maxsymlinks = 0;
/* Flags describing certain properties of the unionfs. */
int unionfs_flags;
/* The filesystem id (the pid). */
pid_t fsid;
/* A port to the underlying node. */
mach_port_t underlying_node;
/* stat information for the underlying node. */
struct stat underlying_node_stat;
/* Mapped time, used for updating node information. */
volatile struct mapped_time_value *maptime;
/* Used by netfs_set_options to handle runtime option parsing. */
struct argp *netfs_runtime_argp = &argp_runtime;
/* Main entry point. */
int
main (int argc, char **argv)
{
mach_port_t bootstrap_port;
error_t err = 0;
root_update_init ();
err = stow_init();
if (err)
error (EXIT_FAILURE, err, "failed to initialize stow support");
/* Argument parsing. */
argp_parse (&argp_startup, argc, argv, ARGP_IN_ORDER, 0, 0);
err = node_create_root (&netfs_root_node);
if (err)
error (EXIT_FAILURE, err, "failed to create root node");
/* netfs initialization. */
task_get_bootstrap_port (mach_task_self (), &bootstrap_port);
netfs_init ();
underlying_node = netfs_startup (bootstrap_port, O_READ);
err = node_init_root (netfs_root_node);
if (err)
error (EXIT_FAILURE, err, "failed to initialize root node");
/* Map the time, used for updating node information. */
err = maptime_map (0, 0, &maptime);
if (err)
error (EXIT_FAILURE, err, "maptime_map");
/* More initialiazation. */
ncache_init (ncache_size);
/* Here we adjust the root node permissions. */
err = io_stat (underlying_node, &underlying_node_stat);
if (err)
error (EXIT_FAILURE, err, "io_stat");
fsid = getpid ();
netfs_root_node->nn_stat = underlying_node_stat;
netfs_root_node->nn_stat.st_ino = UNIONFS_ROOT_INODE; /* FIXME. */
netfs_root_node->nn_stat.st_fsid = fsid;
netfs_root_node->nn_stat.st_mode = S_IFDIR | (underlying_node_stat.st_mode
& ~S_IFMT & ~S_ITRANS);
netfs_root_node->nn_translated = netfs_root_node->nn_stat.st_mode;
/* If the underlying node isn't a directory, enhance the stat
information. */
if (! S_ISDIR (underlying_node_stat.st_mode))
{
if (underlying_node_stat.st_mode & S_IRUSR)
netfs_root_node->nn_stat.st_mode |= S_IXUSR;
if (underlying_node_stat.st_mode & S_IRGRP)
netfs_root_node->nn_stat.st_mode |= S_IXGRP;
if (underlying_node_stat.st_mode & S_IROTH)
netfs_root_node->nn_stat.st_mode |= S_IXOTH;
}
/* Update the timestamps of the root node. */
fshelp_touch (&netfs_root_node->nn_stat,
TOUCH_ATIME | TOUCH_MTIME | TOUCH_CTIME, maptime);
/* Start serving clients. */
for (;;)
netfs_server_loop ();
}
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