From 6b9fb1d6104459404b5b7a918530071a02af80c7 Mon Sep 17 00:00:00 2001 From: Miles Bader Date: Wed, 23 Jul 1997 13:47:31 +0000 Subject: Initial checkin --- usermux/usermux.c | 149 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100644 usermux/usermux.c (limited to 'usermux/usermux.c') diff --git a/usermux/usermux.c b/usermux/usermux.c new file mode 100644 index 00000000..060fb411 --- /dev/null +++ b/usermux/usermux.c @@ -0,0 +1,149 @@ +/* Multiplexing filesystems by host + + Copyright (C) 1997 Free Software Foundation, Inc. + Written by Miles Bader + 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 +#include +#include +#include +#include +#include + +#include "usermux.h" + +int netfs_maxsymlinks = 25; + +volatile struct mapped_time_value *usermux_mapped_time; + +#define OPT_USER_PAT 1 +#define OPT_HOME_PAT 2 +#define OPT_UID_PAT 3 + +/* Startup options. */ +static const struct argp_option options[] = +{ + { "user-pattern", OPT_USER_PAT, "PAT", 0, + "The string to replace in the translator specification with the user name" + " (default `${user}')" }, + { "home-pattern", OPT_HOME_PAT, "PAT", 0, + "The string to replace in the translator specification with the user's" + " home directory (default `${home}')" }, + { "uid-pattern", OPT_UID_PAT, "PAT", 0, + "The string to replace in the translator specification with the uid" + " (default `${uid}')" }, + { "clear-patterns", 'C', 0, 0, + "Reset all patterns to empty; this option may then be followed by options" + " to set specific patterns" }, + { 0 } +}; +static const char args_doc[] = "[TRANSLATOR [ARG...]]"; +static const char doc[] = + "A translator for invoking user-specific translators" + "\vThis translator appears like a directory in which user names can be" + " looked up, and will start TRANSLATOR to service each resulting node." + " If no pattern occurs in the translator specification, the users's" + " home directory is appended to it instead; TRANSLATOR defaults to" + " " _HURD_SYMLINK "."; + +int +main (int argc, char **argv) +{ + error_t err; + struct stat ul_stat; + mach_port_t bootstrap; + struct usermux mux = + { user_pat: "${user}", home_pat: "${home}", uid_pat: "${uid}" }; + struct netnode root_nn = { mux: &mux }; + + error_t parse_opt (int key, char *arg, struct argp_state *state) + { + switch (key) + { + case OPT_USER_PAT: mux.user_pat = arg; break; + case OPT_HOME_PAT: mux.home_pat = arg; break; + case OPT_UID_PAT: mux.uid_pat = arg; break; + case 'C': bzero (&mux, sizeof mux); break; + + case ARGP_KEY_NO_ARGS: + bzero (&mux, sizeof mux); /* Default doesn't use them; be careful. */ + return argz_create_sep (_HURD_SYMLINK, 0, + &mux.trans_template, &mux.trans_template_len); + 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, &usermux_maptime); + 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; + + /* We implement symlinks directly, and everything else as a real + translator. */ + if (strcmp (mux.trans_template, _HURD_SYMLINK) == 0) + mux.stat_template.st_mode = S_IFLNK | 0666; + else + mux.stat_template.st_mode = S_IFREG | S_IPTRANS | 0666; + + /* 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); + + fshelp_touch (&netfs_root_node->nn_stat, TOUCH_ATIME|TOUCH_MTIME|TOUCH_CTIME, + usermux_maptime); + + for (;;) /* ?? */ + netfs_server_loop (); +} -- cgit v1.2.3