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/* Set a file's translator.
Copyright (C) 1995 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 <getopt.h>
#include <fcntl.h>
#include <unistd.h>
#include <error.h>
#include <argz.h>
#include <start-trans.h>
/* ---------------------------------------------------------------- */
#define USAGE "Usage: %s [OPTION...] FILE [TRANSLATOR...]\n"
static void
usage(status)
int status;
{
if (status != 0)
fprintf(stderr, "Try `%s --help' for more information.\n",
program_invocation_name);
else
{
printf(USAGE, program_invocation_name);
printf("\
\n\
-a, --active Set FILE's active translator\n\
-p, --passive Set FILE's passive translator\n\
-c, --create Create FILE if it doesn't exist\n\
-f, --force Set the translator even if one already exists\n\
-k, --keep-active Keep any currently running active translator\n\
when setting the passive translator\n\
-L, --dereference If a translator exists, put the new one on top\n\
--help Give this help list\n\
");
}
exit(status);
}
#define SHORT_OPTIONS "apcfkLt?"
static struct option options[] =
{
{"active", no_argument, 0, 'a'},
{"passive", no_argument, 0, 'p'},
{"keep-active", no_argument, 0, 'k'},
{"create", no_argument, 0, 'c'},
{"force", no_argument, 0, 'f'},
{"dereference", no_argument, 0, 'L'},
{"help", no_argument, 0, '?'},
{0, 0, 0, 0}
};
/* ---------------------------------------------------------------- */
void
main(int argc, char *argv[])
{
int opt;
error_t err;
/* The filesystem node we're putting a translator on. */
char *node_name = 0;
file_t node;
/* The translator's arg vector, in '\0' separated format. */
char *argz = 0;
int argz_len = 0;
/* The control port for any active translator we start up. */
fsys_t active_control = MACH_PORT_NULL;
/* Flags to pass to file_set_translator. By default we only set a
translator if there's no existing one. */
int flags = FS_TRANS_SET | FS_TRANS_EXCL;
/* Various option flags. */
int passive = 0, active = 0;
int create = 0, force = 0, deref = 0, keep_active = 0;
/* Parse our options... */
while ((opt = getopt_long(argc, argv, "-" SHORT_OPTIONS, options, 0)) != EOF)
switch (opt)
{
case 1:
if (node_name)
/* We've already read the node name, this must be the translator. */
{
err = argz_create(argv + optind - 1, &argz, &argz_len);
if (err)
error(3, err, "Can't create argz vector");
optind = argc; /* stop parsing */
}
else
node_name = optarg;
break;
case 'a': active = 1; break;
case 'p': passive = 1; break;
case 'f': force = 1; break;
case 'k': keep_active = 1; break;
case 'c': create = 1; break;
case 'L': deref = 1; break;
case '?': usage(0);
default: usage(-1);
}
if (! node_name)
usage (-1);
if (!active && !passive)
passive = 1;
node =
file_name_lookup(node_name,
(deref ? 0 : O_NOTRANS) | (create ? O_CREAT : 0),
0666);
if (node == MACH_PORT_NULL)
error(1, errno, "%s", node_name);
if (active && argz_len > 0)
{
err = start_translator(node, argz, argz_len, 60000, &active_control);
if (err)
error(4, err, "%s", argz);
}
if (force)
/* Kill any existing translators. */
flags &= ~FS_TRANS_EXCL;
err =
file_set_translator(node,
passive ? flags : 0,
(active || !keep_active) ? flags : 0,
0,
argz, argz_len,
active_control, MACH_MSG_TYPE_MOVE_SEND);
if (err)
error(5, err, "%s", node_name);
exit(0);
}
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