/* Some handy utility routines for fsys control ports Copyright (C) 1996 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <errno.h> #include <argz.h> #include <mach.h> #include <hurd/fsys.h> /* Make FSYS readonly or writable. */ error_t fsys_set_readonly (fsys_t fsys, int readonly) { error_t err; char *opts = readonly ? "--readonly" : "--writable"; size_t opts_len = strlen (opts) + 1; err = fsys_set_options (fsys, opts, opts_len, 0); if (err == EINVAL) err = EOPNOTSUPP; return err; } /* Ask FSYS whether it's readonly, returning the result in READONLY; we don't really have a good method for this, other than asking for it's options and looking for `--readonly' or `--writable'. If we see neither, return EOPNOTSUPP. */ error_t fsys_get_readonly (fsys_t fsys, int *readonly) { error_t err; char _opts[200], *opts = _opts; size_t opts_len = sizeof opts; err = fsys_get_options (fsys, &opts, &opts_len); if (! err) { char *opt; int ok = 0; for (opt = opts ; !ok && opt && opt < opts + opts_len ; opt = argz_next (opts, opts_len, opt)) if (strcasecmp (opt, "--readonly") == 0) { *readonly = 1; ok = 1; } else if (strcasecmp (opt, "--writable") == 0) { *readonly = 0; ok = 1; } if (! ok) err = EOPNOTSUPP; /* So far as we know... */ if (opts != _opts) /* Free out-of-line memory returned by fsys_get_options. */ vm_deallocate (mach_task_self (), (vm_address_t)opts, opts_len); } return err; } /* Tell FSYS to remount itself. */ error_t fsys_remount (fsys_t fsys, int readonly) { error_t err; char *opts = "--remount"; size_t opts_len = strlen (opts) + 1; err = fsys_set_options (fsys, opts, opts_len, 0); if (err == EINVAL) err = EOPNOTSUPP; return err; }