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-rw-r--r--hostmux/hostmux.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/hostmux/hostmux.c b/hostmux/hostmux.c
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+/* Multiplexing filesystems by host
+
+ Copyright (C) 1997 Free Software Foundation, Inc.
+ Written by Miles Bader <miles@gnu.ai.mit.edu>
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd 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.
+
+ The GNU Hurd 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, USA. */
+
+#include <unistd.h>
+#include <argp.h>
+#include <argz.h>
+#include <error.h>
+#include <sys/time.h>
+
+#include "hostmux.h"
+
+int netfs_maxsymlinks = 25;
+
+volatile struct mapped_time_value *hostmux_mapped_time;
+
+/* Startup options. */
+static const struct argp_option options[] =
+{
+ { "host-pattern", 'H', "PAT", OPTION_ARG_OPTIONAL,
+ "The string to replace in the translator specification with the hostname;"
+ " if empty, or doesn't occur, the hostname is appended as additional"
+ " argument instead (default `${host}')" },
+ { 0 }
+};
+static const char args_doc[] = "TRANSLATOR [ARG...]";
+static const char doc[] =
+ "A translator for invoking host-specific translators"
+ "\vThis translator appears like a directory in which hostnames can be"
+ " looked up, and will start TRANSLATOR to service each resulting node.";
+
+/* NFS client main program */
+int
+main (int argc, char **argv)
+{
+ error_t err;
+ struct stat ul_stat;
+ mach_port_t bootstrap;
+ struct hostmux mux = { host_pat: "${host}", next_fileno: 10 };
+ struct netnode root_nn = { mux: &mux };
+
+ error_t parse_opt (int key, char *arg, struct argp_state *state)
+ {
+ switch (key)
+ {
+ case 'H':
+ mux.host_pat = arg; break;
+ case ARGP_KEY_NO_ARGS:
+ argp_usage (state);
+ case ARGP_KEY_ARGS:
+ /* Steal the entire tail of arg vector for our own use. */
+ return argz_create (state->argv + state->next,
+ &mux.trans_template, &mux.trans_template_len);
+ default:
+ return ARGP_ERR_UNKNOWN;
+ }
+ return 0;
+ }
+ struct argp argp = { options, parse_opt, args_doc, doc };
+
+ /* Parse our command line arguments. */
+ argp_parse (&argp, argc, argv, 0, 0, 0);
+
+ task_get_bootstrap_port (mach_task_self (), &bootstrap);
+ netfs_init ();
+
+ /* Create the root node (some attributes initialized below). */
+ netfs_root_node = netfs_make_node (&root_nn);
+ if (! netfs_root_node)
+ error (5, ENOMEM, "Cannot create root node");
+
+ err = maptime_map (0, 0, &hostmux_mapped_time);
+ if (err)
+ error (6, err, "Cannot map time");
+
+ /* Handshake with the party trying to start the translator. */
+ mux.underlying = netfs_startup (bootstrap, 0);
+
+ /* We inherit various attributes from the node underlying this translator. */
+ err = io_stat (mux.underlying, &ul_stat);
+ if (err)
+ error (7, err, "Cannot stat underlying node");
+
+ /* MUX.stat_template contains some fields that are inherited by all nodes
+ we create. */
+ mux.stat_template.st_uid = ul_stat.st_uid;
+ mux.stat_template.st_gid = ul_stat.st_gid;
+ mux.stat_template.st_author = ul_stat.st_author;
+ mux.stat_template.st_fsid = getpid ();
+ mux.stat_template.st_nlink = 1;
+ mux.stat_template.st_fstype = FSTYPE_MISC;
+
+ /* Initialize the root node's stat information. */
+ netfs_root_node->nn_stat = mux.stat_template;
+ netfs_root_node->nn_stat.st_ino = 2;
+ netfs_root_node->nn_stat.st_mode =
+ S_IFDIR | (ul_stat.st_mode & ~S_IFMT & ~S_ITRANS);
+ touch (netfs_root_node, TOUCH_ATIME|TOUCH_MTIME|TOUCH_CTIME);
+
+ for (;;) /* ?? */
+ netfs_server_loop ();
+}