--- /dev/null
+/* Declarations of file name translation functions for the GNU Hurd.
+Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#ifndef _HURD_LOOKUP_H
+#define _HURD_LOOKUP_H 1
+
+/* These functions all take two callback functions as the first two arguments.
+ The first callback function USE_INIT_PORT is called as follows:
+
+ error_t use_init_port (int which, error_t (*operate) (mach_port_t));
+
+ WHICH is nonnegative value less than INIT_PORT_MAX, indicating which
+ init port is required. The callback function should call *OPERATE
+ with a send right to the appropriate init port. No user reference
+ is consumed; the right will only be used after *OPERATE returns if
+ *OPERATE has added its own user reference.
+
+ The second callback function GET_DTABLE_PORT should behave like `getdport'.
+
+ All these functions return zero on success or an error code on failure. */
+
+
+/* Open a port to FILE with the given FLAGS and MODE (see <fcntl.h>). If
+ successful, returns zero and store the port to FILE in *PORT; otherwise
+ returns an error code. */
+
+error_t __hurd_file_name_lookup (error_t (*use_init_port)
+ (int which,
+ error_t (*operate) (mach_port_t)),
+ file_t (*get_dtable_port) (int fd),
+ const char *file_name,
+ int flags, mode_t mode,
+ file_t *result);
+error_t hurd_file_name_lookup (error_t (*use_init_port)
+ (int which,
+ error_t (*operate) (mach_port_t)),
+ file_t (*get_dtable_port) (int fd),
+ const char *file_name,
+ int flags, mode_t mode,
+ file_t *result);
+
+
+/* Split FILE into a directory and a name within the directory. Look up a
+ port for the directory and store it in *DIR; store in *NAME a pointer
+ into FILE where the name within directory begins. */
+
+error_t __hurd_file_name_split (error_t (*use_init_port)
+ (int which,
+ error_t (*operate) (mach_port_t)),
+ file_t (*get_dtable_port) (int fd),
+ const char *file_name,
+ file_t *dir, char **name);
+error_t hurd_file_name_split (error_t (*use_init_port)
+ (int which,
+ error_t (*operate) (mach_port_t)),
+ file_t (*get_dtable_port) (int fd),
+ const char *file_name,
+ file_t *dir, char **name);
+
+
+/* Process the values returned by `dir_lookup' et al, and loop doing
+ `dir_lookup' calls until one returns FS_RETRY_NONE. The arguments
+ should be those just passed to and/or returned from `dir_lookup',
+ `fsys_getroot', or `file_invoke_translator'. This function consumes the
+ reference in *RESULT even if it returns an error. */
+
+error_t __hurd_file_name_lookup_retry (error_t (*use_init_port)
+ (int which,
+ error_t (*operate) (mach_port_t)),
+ file_t (*get_dtable_port) (int fd),
+ enum retry_type doretry,
+ char retryname[1024],
+ int flags, mode_t mode,
+ file_t *result);
+error_t hurd_file_name_lookup_retry (error_t (*use_init_port)
+ (int which,
+ error_t (*operate) (mach_port_t)),
+ file_t (*get_dtable_port) (int fd),
+ enum retry_type doretry,
+ char retryname[1024],
+ int flags, mode_t mode,
+ file_t *result);
+
+
+#endif /* hurd/lookup.h */
Cambridge, MA 02139, USA. */
#include <hurd.h>
+#include <hurd/lookup.h>
#include <string.h>
#include <limits.h>
#include <fcntl.h>
}
error_t
-__hurd_file_name_lookup (file_t crdir, file_t cwdir,
+__hurd_file_name_lookup (error_t (*use_init_port)
+ (int which, error_t (*operate) (file_t)),
+ file_t (*get_dtable_port) (int fd),
const char *file_name, int flags, mode_t mode,
file_t *result)
{
error_t err;
enum retry_type doretry;
char retryname[1024]; /* XXX string_t LOSES! */
- file_t startdir;
- startdir = file_name[0] == '/' ? crdir : cwdir;
+ error_t lookup (mach_port_t startdir)
+ {
+ while (file_name[0] == '/')
+ file_name++;
- while (file_name[0] == '/')
- file_name++;
+ return lookup_error (__dir_lookup (startdir, file_name, flags, mode,
+ &doretry, retryname, result));
+ }
- if (err = __dir_lookup (startdir, file_name, flags, mode,
- &doretry, retryname, result))
- return lookup_error (err);
+ err = (*use_init_port) (file_name[0] == '/'
+ ? INIT_PORT_CRDIR : INIT_PORT_CWDIR,
+ &lookup);
+ if (! err)
+ err = __hurd_file_name_lookup_retry (use_init_port, get_dtable_port,
+ doretry, retryname, flags, mode,
+ result);
- return __hurd_file_name_lookup_retry (crdir, doretry, retryname, flags, mode,
- result);
+ return err;
}
weak_alias (__hurd_file_name_lookup, hurd_file_name_lookup)
error_t
-__hurd_file_name_lookup_retry (file_t crdir,
+__hurd_file_name_lookup_retry (error_t (*use_init_port)
+ (int which, error_t (*operate) (file_t)),
+ file_t (*get_dtable_port) (int fd),
enum retry_type doretry,
char retryname[1024],
int flags, mode_t mode,
file_t *result)
{
error_t err;
- file_t startdir;
- file_t newpt;
char *file_name;
- int dealloc_dir;
int nloops;
- dealloc_dir = 0;
+ error_t lookup (file_t startdir)
+ {
+ while (file_name[0] == '/')
+ file_name++;
+
+ return lookup_error (__dir_lookup (startdir, file_name, flags, mode,
+ &doretry, retryname, result));
+ }
+ error_t reauthenticate (file_t unauth)
+ {
+ error_t err;
+ mach_port_t ref = __mach_reply_port ();
+ error_t reauth (auth_t auth)
+ {
+ return __auth_user_authenticate (auth, unauth, ref,
+ MACH_MSG_TYPE_MAKE_SEND,
+ result);
+ }
+ err = __io_reauthenticate (unauth, ref, MACH_MSG_TYPE_MAKE_SEND);
+ if (! err)
+ err = (*use_init_port) (INIT_PORT_AUTH, &reauth);
+ __mach_port_destroy (__mach_task_self (), ref);
+ __mach_port_deallocate (__mach_task_self (), unauth);
+ return err;
+ }
+
nloops = 0;
err = 0;
-
- while (1)
+ do
{
- if (dealloc_dir)
- __mach_port_deallocate (__mach_task_self (), startdir);
- if (err)
- return lookup_error (err);
+ file_t startdir = MACH_PORT_NULL;
+ int dirport = INIT_PORT_CWDIR;
switch (doretry)
{
case FS_RETRY_REAUTH:
- {
- mach_port_t ref = __mach_reply_port ();
- err = __io_reauthenticate (*result,
- ref, MACH_MSG_TYPE_MAKE_SEND);
- if (! err)
- err = __USEPORT
- (AUTH, __auth_user_authenticate (port, *result,
- ref,
- MACH_MSG_TYPE_MAKE_SEND,
- &newpt));
- __mach_port_destroy (__mach_task_self (), ref);
- }
- __mach_port_deallocate (__mach_task_self (), *result);
- if (err)
+ if (err = reauthenticate (*result))
return err;
- *result = newpt;
/* Fall through. */
case FS_RETRY_NORMAL:
}
startdir = *result;
- dealloc_dir = 1;
file_name = retryname;
break;
switch (retryname[0])
{
case '/':
- startdir = crdir;
- dealloc_dir = 0;
+ dirport = INIT_PORT_CRDIR;
if (*result != MACH_PORT_NULL)
__mach_port_deallocate (__mach_task_self (), *result);
file_name = &retryname[1];
errno = save;
return ENOENT;
}
- *result = __getdport (fd);
- if (*result == MACH_PORT_NULL)
+ if (! get_dtable_port)
+ err = EGRATUITOUS;
+ else
{
- /* If the name was a proper number, but the file
- descriptor does not exist, we return EBADF instead
- of ENOENT. */
- error_t err = errno;
- errno = save;
- return err;
+ *result = (*get_dtable_port) (fd);
+ if (*result == MACH_PORT_NULL)
+ {
+ /* If the name was a proper number, but the file
+ descriptor does not exist, we return EBADF instead
+ of ENOENT. */
+ err = errno;
+ errno = save;
+ }
}
errno = save;
+ if (err)
+ return err;
if (*end == '\0')
return 0;
else
{
/* Do a normal retry on the remaining components. */
startdir = *result;
- dealloc_dir = 1;
file_name = end + 1; /* Skip the slash. */
break;
}
struct host_basic_info hostinfo;
mach_msg_type_number_t hostinfocnt = HOST_BASIC_INFO_COUNT;
char *p;
+ /* XXX want client's host */
if (err = __host_info (__mach_host_self (), HOST_BASIC_INFO,
(natural_t *) &hostinfo,
&hostinfocnt))
if (p > retryname)
strcpy (retryname, p);
startdir = *result;
- dealloc_dir = 1;
}
else
goto bad_magic;
error_t opentty (file_t *result)
{
error_t err;
- file_t unauth;
- err = __USEPORT (CTTYID,
- __termctty_open_terminal (port,
- flags,
- &unauth));
- if (! err)
+ error_t ctty_open (file_t port)
{
- mach_port_t ref = __mach_reply_port ();
- err = __io_reauthenticate
- (unauth,
- ref,
- MACH_MSG_TYPE_MAKE_SEND);
- if (! err)
- err = __USEPORT
- (AUTH, __auth_user_authenticate
- (port,
- unauth,
- ref, MACH_MSG_TYPE_MAKE_SEND,
- result));
- __mach_port_deallocate (__mach_task_self (),
- unauth);
- __mach_port_destroy (__mach_task_self (), ref);
+ return __termctty_open_terminal (port,
+ flags,
+ result);
}
+ err = (*use_init_port) (INIT_PORT_CTTYID, &ctty_open);
+ if (! err)
+ err = reauthenticate (*result);
return err;
}
case '/':
if (err = opentty (&startdir))
return err;
- dealloc_dir = 1;
strcpy (retryname, &retryname[4]);
break;
default:
return EGRATUITOUS;
}
- err = __dir_lookup (startdir, file_name, flags, mode,
- &doretry, retryname, result);
- }
+ if (startdir != MACH_PORT_NULL)
+ {
+ err = lookup (startdir);
+ __mach_port_deallocate (__mach_task_self (), startdir);
+ startdir = MACH_PORT_NULL;
+ }
+ else
+ err = (*use_init_port) (dirport, &lookup);
+ } while (! err);
+
+ return err;
}
weak_alias (__hurd_file_name_lookup_retry, hurd_file_name_lookup_retry)
error_t
-__hurd_file_name_split (file_t crdir, file_t cwdir,
+__hurd_file_name_split (error_t (*use_init_port)
+ (int which, error_t (*operate) (file_t)),
+ file_t (*get_dtable_port) (int fd),
const char *file_name,
file_t *dir, char **name)
{
- const char *lastslash;
- error_t err;
+ error_t addref (file_t crdir)
+ {
+ *dir = crdir;
+ return __mach_port_mod_refs (__mach_task_self (),
+ crdir, MACH_PORT_RIGHT_SEND, +1);
+ }
+
+ const char *lastslash = strrchr (file_name, '/');
- lastslash = strrchr (file_name, '/');
if (lastslash != NULL)
{
if (lastslash == file_name)
{
/* "/foobar" => crdir + "foobar". */
*name = (char *) file_name + 1;
- if (err = __mach_port_mod_refs (__mach_task_self (),
- crdir, MACH_PORT_RIGHT_SEND, +1))
- return err;
- *dir = crdir;
- return 0;
+ return (*use_init_port) (INIT_PORT_CRDIR, &addref);
}
else
{
memcpy (dirname, file_name, lastslash - file_name);
dirname[lastslash - file_name] = '\0';
*name = (char *) lastslash + 1;
- return __hurd_file_name_lookup (crdir, cwdir, dirname, 0, 0, dir);
+ return __hurd_file_name_lookup (use_init_port, get_dtable_port,
+ dirname, 0, 0, dir);
}
}
else
{
/* "foobar" => cwdir + "foobar". */
*name = (char *) file_name;
- if (err = __mach_port_mod_refs (__mach_task_self (),
- cwdir, MACH_PORT_RIGHT_SEND, +1))
- return err;
- *dir = cwdir;
- return 0;
+ return (*use_init_port) (INIT_PORT_CWDIR, &addref);
}
}
weak_alias (__hurd_file_name_split, hurd_file_name_split)
__file_name_lookup (const char *file_name, int flags, mode_t mode)
{
error_t err;
- file_t result, crdir, cwdir;
- struct hurd_userlink crdir_ulink, cwdir_ulink;
-
- crdir = _hurd_port_get (&_hurd_ports[INIT_PORT_CRDIR], &crdir_ulink);
- cwdir = _hurd_port_get (&_hurd_ports[INIT_PORT_CWDIR], &cwdir_ulink);
+ file_t result;
- err = __hurd_file_name_lookup (crdir, cwdir, file_name, flags, mode,
+ err = __hurd_file_name_lookup (&_hurd_ports_use, &__getdport,
+ file_name, flags, mode,
&result);
- _hurd_port_free (&_hurd_ports[INIT_PORT_CRDIR], &crdir_ulink, crdir);
- _hurd_port_free (&_hurd_ports[INIT_PORT_CWDIR], &cwdir_ulink, cwdir);
-
- if (err)
- return __hurd_fail (err), MACH_PORT_NULL;
- else
- return result;
+ return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
}
weak_alias (__file_name_lookup, file_name_lookup)
__file_name_split (const char *file_name, char **name)
{
error_t err;
- file_t dir, crdir, cwdir;
- struct hurd_userlink crdir_ulink, cwdir_ulink;
+ file_t result;
+
+ err = __hurd_file_name_split (&_hurd_ports_use, &__getdport,
+ file_name, &result, name);
- crdir = _hurd_port_get (&_hurd_ports[INIT_PORT_CRDIR], &crdir_ulink);
- cwdir = _hurd_port_get (&_hurd_ports[INIT_PORT_CWDIR], &cwdir_ulink);
+ return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
+}
+weak_alias (__file_name_split, file_name_split)
- err = __hurd_file_name_split (crdir, cwdir, file_name, &dir, name);
- _hurd_port_free (&_hurd_ports[INIT_PORT_CRDIR], &crdir_ulink, crdir);
- _hurd_port_free (&_hurd_ports[INIT_PORT_CWDIR], &cwdir_ulink, cwdir);
+file_t
+__file_name_lookup_under (file_t startdir,
+ const char *file_name, int flags, mode_t mode)
+{
+ error_t err;
+ file_t result;
- if (err)
+ error_t use_init_port (int which, error_t (*operate) (mach_port_t))
{
- errno = err;
- return MACH_PORT_NULL;
+ return (which == INIT_PORT_CWDIR ? (*operate) (startdir) :
+ _hurd_ports_use (which, operate));
}
- else
- return dir;
+
+ err = __hurd_file_name_lookup (&use_init_port, &__getdport,
+ file_name, flags, mode,
+ &result);
+
+ return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
}
-weak_alias (__file_name_split, file_name_split)
+weak_alias (__file_name_lookup_under, file_name_lookup_under)
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