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/* Set options in a running filesystem
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <hurd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <argp.h>
#include <fcntl.h>
#include <unistd.h>
#include <error.h>
#include <argz.h>
#include <hurd/fsys.h>
char *argp_program_version = "fsysopts 1.0 (GNU " HURD_RELEASE ")";
static struct argp_option options[] =
{
{"dereference", 'L', 0, 0, "If FILESYS is a symbolic link, follow it"},
{"recursive", 'R', 0, 0, "Pass these options to any child translators"},
{0, 0, 0, 0}
};
static char *args_doc = "FILESYS [FS_OPTION...]";
static char *doc = "The legal values for FS_OPTION depends on FILESYS, but\
some common ones are: --readonly, --writable, --remount, --sync[=INTERVAL],\
and --nosync.\n\nIf no options are supplied, FILESYS's existing options\
are printed";
/* ---------------------------------------------------------------- */
void
main(int argc, char *argv[])
{
error_t err;
/* The file we use as a handle to get FSYS. */
char *node_name = 0;
file_t node;
/* The filesystem options vector, in '\0' separated format. */
char *argz = 0;
int argz_len = 0;
int deref = 0, recursive = 0;
/* Parse a command line option. */
error_t parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case ARGP_KEY_ARG:
node_name = arg;
err = argz_create (state->argv + state->next, &argz, &argz_len);
if (err)
error(3, err, "Can't create options vector");
state->next = state->argc; /* stop parsing */
break;
case 'R': recursive = 1; break;
case 'L': deref = 1; break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
struct argp argp = {options, parse_opt, args_doc, doc};
argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, 0);
node = file_name_lookup (node_name, (deref ? 0 : O_NOLINK), 0666);
if (node == MACH_PORT_NULL)
error (1, errno, "%s", node_name);
if (argz_len)
{
/* The filesystem we're passing options to. */
fsys_t fsys;
/* Get the filesystem for NODE. */
err = file_getcontrol (node, &fsys);
if (err)
error (2, err, "%s", node_name);
err = fsys_set_options (fsys, argz, argz_len, recursive);
if (err)
{
argz_stringify (argz, argz_len, ' ');
error(5, err, "%s: %s", node_name, argz);
}
}
else
{
err = file_get_fs_options (node, &argz, &argz_len);
if (err)
error (5, err, "%s", node_name);
argz_stringify (argz, argz_len, ' ');
puts (argz);
}
exit(0);
}
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