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/* Set a file's translator.
Copyright (C) 1995, 1996, 1997 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/fshelp.h>
#include <version.h>
const char *argp_program_version = STANDARD_HURD_VERSION (settrans);
#define DEFAULT_TIMEOUT 60
#define _STRINGIFY(arg) #arg
#define STRINGIFY(arg) _STRINGIFY (arg)
static struct argp_option options[] =
{
{"active", 'a', 0, 0, "Set NODE's active translator" },
{"passive", 'p', 0, 0, "Set NODE's passive translator" },
{"create", 'c', 0, 0, "Create NODE if it doesn't exist" },
{"dereference", 'L', 0, 0, "If a translator exists, put the new one on top"},
{"pause", 'P', 0, 0, "When starting an active translator, prompt and"
" wait for a newline on stdin before completing the startup handshake"},
{"timeout", 't',"SEC",0, "Timeout for translator startup, in seconds"
" (default " STRINGIFY (DEFAULT_TIMEOUT) "); 0 means no timeout"},
{"exclusive", 'x', 0, 0, "Only set the translator if there is none already"},
{0,0,0,0, "When setting the passive translator, if there's an active translator:"},
{"goaway", 'g', 0, 0, "Make the active translator go away"},
{"keep-active", 'k', 0, 0, "Leave the existing active translator running"},
{0,0,0,0, "When an active translator is told to go away:"},
{"recursive", 'R', 0, 0, "Shutdown its children too"},
{"force", 'f', 0, 0, "If it doesn't want to die, force it"},
{"nosync", 'S', 0, 0, "Don't sync it before killing it"},
{0, 0}
};
static char *args_doc = "NODE [TRANSLATOR ARG...]";
static char *doc = "Set the passive/active translator on NODE."
"\vBy default the passive translator is set.";
/* ---------------------------------------------------------------- */
void
main(int argc, char *argv[])
{
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. */
int active_flags = 0;
int passive_flags = 0;
int lookup_flags = O_NOTRANS;
int goaway_flags = 0;
/* Various option flags. */
int passive = 0, active = 0, keep_active = 0, pause = 0, kill_active = 0;
int excl = 0;
int timeout = DEFAULT_TIMEOUT * 1000; /* ms */
/* Parse our options... */
error_t parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case ARGP_KEY_ARG:
if (state->arg_num == 0)
node_name = arg;
else /* command */
{
error_t err =
argz_create (state->argv + state->next - 1, &argz, &argz_len);
if (err)
error(3, err, "Can't create options vector");
state->next = state->argc; /* stop parsing */
}
break;
case ARGP_KEY_NO_ARGS:
argp_usage (state);
return EINVAL;
case 'a': active = 1; break;
case 'p': passive = 1; break;
case 'k': keep_active = 1; break;
case 'g': kill_active = 1; break;
case 'x': excl = 1; break;
case 'P': pause = 1; break;
case 'c': lookup_flags |= O_CREAT; break;
case 'L': lookup_flags &= ~O_NOTRANS; break;
case 'R': goaway_flags |= FSYS_GOAWAY_RECURSE; break;
case 'S': goaway_flags |= FSYS_GOAWAY_NOSYNC; break;
case 'f': goaway_flags |= FSYS_GOAWAY_FORCE; break;
/* Use atof so the user can specifiy fractional timeouts. */
case 't': timeout = atof (arg) * 1000.0; 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);
if (!active && !passive)
passive = 1; /* By default, set the passive translator. */
if (passive)
passive_flags = FS_TRANS_SET | (excl ? FS_TRANS_EXCL : 0);
if (active)
active_flags = FS_TRANS_SET | (excl ? FS_TRANS_EXCL : 0);
if (passive && !active)
/* When setting just the passive, decide what to do with any active. */
if (kill_active)
/* Make it go away. */
active_flags = FS_TRANS_SET;
else if (! keep_active)
/* Ensure that there isn't one. */
active_flags = FS_TRANS_SET | FS_TRANS_EXCL;
if (active && argz_len > 0)
{
/* Error during file lookup; we use this to avoid duplicating error
messages. */
error_t open_err = 0;
/* The callback to start_translator opens NODE as a side effect. */
error_t open_node (int flags,
mach_port_t *underlying,
mach_msg_type_name_t *underlying_type)
{
if (pause)
{
fprintf (stderr, "Pausing...");
getchar ();
}
node = file_name_lookup (node_name, flags | lookup_flags, 0666);
if (node == MACH_PORT_NULL)
{
open_err = errno;
return open_err;
}
*underlying = node;
*underlying_type = MACH_MSG_TYPE_COPY_SEND;
return 0;
}
err = fshelp_start_translator (open_node, argz, argz, argz_len, timeout,
&active_control);
if (err)
/* If ERR is due to a problem opening the translated node, we print
that name, otherwise, the name of the translator. */
error(4, err, "%s", (err == open_err) ? node_name : argz);
}
else
{
node = file_name_lookup(node_name, lookup_flags, 0666);
if (node == MACH_PORT_NULL)
error(1, errno, "%s", node_name);
}
err =
file_set_translator(node,
passive_flags, active_flags, goaway_flags,
argz, argz_len,
active_control, MACH_MSG_TYPE_COPY_SEND);
if (err)
error(5, err, "%s", node_name);
exit(0);
}
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