mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
b207ff4bd8
* sysdeps/mach/hurd/fcntlbits.h (O_SHLOCK, O_EXLOCK): Redesignate as file name translation flags. * hurd/hurdlookup.c (__hurd_file_name_lookup_retry): Don't pretend to do anything for O_SHLOCK or O_EXLOCK. Those are now file name translation flags.
415 lines
11 KiB
C
415 lines
11 KiB
C
/* Copyright (C) 1992, 1993, 1994, 1995, 1996 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. */
|
||
|
||
#include <hurd.h>
|
||
#include <hurd/lookup.h>
|
||
#include <string.h>
|
||
#include <limits.h>
|
||
#include <fcntl.h>
|
||
#include "stdio-common/_itoa.h"
|
||
#include <hurd/term.h>
|
||
|
||
|
||
/* Translate the error from dir_lookup into the error the user sees. */
|
||
static inline error_t
|
||
lookup_error (error_t error)
|
||
{
|
||
switch (error)
|
||
{
|
||
case EOPNOTSUPP:
|
||
case MIG_BAD_ID:
|
||
/* These indicate that the server does not understand dir_lookup
|
||
at all. If it were a directory, it would, by definition. */
|
||
return ENOTDIR;
|
||
default:
|
||
return error;
|
||
}
|
||
}
|
||
|
||
error_t
|
||
__hurd_file_name_lookup (error_t (*use_init_port)
|
||
(int which, error_t (*operate) (file_t)),
|
||
file_t (*get_dtable_port) (int fd),
|
||
error_t (*lookup)
|
||
(file_t dir, char *name, int flags, mode_t mode,
|
||
retry_type *do_retry, string_t retry_name,
|
||
mach_port_t *result),
|
||
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! */
|
||
|
||
error_t lookup_op (mach_port_t startdir)
|
||
{
|
||
while (file_name[0] == '/')
|
||
file_name++;
|
||
|
||
return lookup_error ((*lookup) (startdir, file_name, flags, mode,
|
||
&doretry, retryname, result));
|
||
}
|
||
|
||
if (! lookup)
|
||
lookup = __dir_lookup;
|
||
|
||
err = (*use_init_port) (file_name[0] == '/'
|
||
? INIT_PORT_CRDIR : INIT_PORT_CWDIR,
|
||
&lookup_op);
|
||
if (! err)
|
||
err = __hurd_file_name_lookup_retry (use_init_port, get_dtable_port, lookup,
|
||
doretry, retryname, flags, mode,
|
||
result);
|
||
|
||
return err;
|
||
}
|
||
weak_alias (__hurd_file_name_lookup, hurd_file_name_lookup)
|
||
|
||
error_t
|
||
__hurd_file_name_lookup_retry (error_t (*use_init_port)
|
||
(int which, error_t (*operate) (file_t)),
|
||
file_t (*get_dtable_port) (int fd),
|
||
error_t (*lookup)
|
||
(file_t dir, char *name, int flags, mode_t mode,
|
||
retry_type *do_retry, string_t retry_name,
|
||
mach_port_t *result),
|
||
enum retry_type doretry,
|
||
char retryname[1024],
|
||
int flags, mode_t mode,
|
||
file_t *result)
|
||
{
|
||
error_t err;
|
||
char *file_name;
|
||
int nloops;
|
||
|
||
error_t lookup_op (file_t startdir)
|
||
{
|
||
while (file_name[0] == '/')
|
||
file_name++;
|
||
|
||
return lookup_error ((*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, 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;
|
||
}
|
||
|
||
if (! lookup)
|
||
lookup = __dir_lookup;
|
||
|
||
nloops = 0;
|
||
err = 0;
|
||
do
|
||
{
|
||
file_t startdir = MACH_PORT_NULL;
|
||
int dirport = INIT_PORT_CWDIR;
|
||
|
||
switch (doretry)
|
||
{
|
||
case FS_RETRY_REAUTH:
|
||
if (err = reauthenticate (*result))
|
||
return err;
|
||
/* Fall through. */
|
||
|
||
case FS_RETRY_NORMAL:
|
||
#ifdef SYMLOOP_MAX
|
||
if (nloops++ >= SYMLOOP_MAX)
|
||
return ELOOP;
|
||
#endif
|
||
|
||
/* An empty RETRYNAME indicates we have the final port. */
|
||
if (retryname[0] == '\0' &&
|
||
/* If reauth'd, we must do one more retry on "" to give the new
|
||
translator a chance to make a new port for us. */
|
||
doretry == FS_RETRY_NORMAL)
|
||
{
|
||
/* We got a successful translation. Now apply any open-time
|
||
action flags we were passed. */
|
||
if (flags & O_TRUNC)
|
||
err = __file_set_size (*result, 0);
|
||
|
||
if (err)
|
||
__mach_port_deallocate (__mach_task_self (), *result);
|
||
return err;
|
||
}
|
||
|
||
startdir = *result;
|
||
file_name = retryname;
|
||
break;
|
||
|
||
case FS_RETRY_MAGICAL:
|
||
switch (retryname[0])
|
||
{
|
||
case '/':
|
||
dirport = INIT_PORT_CRDIR;
|
||
if (*result != MACH_PORT_NULL)
|
||
__mach_port_deallocate (__mach_task_self (), *result);
|
||
file_name = &retryname[1];
|
||
break;
|
||
|
||
case 'f':
|
||
if (retryname[1] == 'd' && retryname[2] == '/')
|
||
{
|
||
int fd;
|
||
char *end;
|
||
int save = errno;
|
||
errno = 0;
|
||
fd = (int) strtol (&retryname[3], &end, 10);
|
||
if (end == NULL || errno || /* Malformed number. */
|
||
/* Check for excess text after the number. A slash
|
||
is valid; it ends the component. Anything else
|
||
does not name a numeric file descriptor. */
|
||
(*end != '/' && *end != '\0'))
|
||
{
|
||
errno = save;
|
||
return ENOENT;
|
||
}
|
||
if (! get_dtable_port)
|
||
err = EGRATUITOUS;
|
||
else
|
||
{
|
||
*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;
|
||
file_name = end + 1; /* Skip the slash. */
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
goto bad_magic;
|
||
break;
|
||
|
||
case 'm':
|
||
if (retryname[1] == 'a' && retryname[2] == 'c' &&
|
||
retryname[3] == 'h' && retryname[4] == 't' &&
|
||
retryname[5] == 'y' && retryname[6] == 'p' &&
|
||
retryname[7] == 'e')
|
||
{
|
||
error_t err;
|
||
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))
|
||
return err;
|
||
if (hostinfocnt != HOST_BASIC_INFO_COUNT)
|
||
return EGRATUITOUS;
|
||
p = _itoa (hostinfo.cpu_subtype, &retryname[8], 10, 0);
|
||
*--p = '/';
|
||
p = _itoa (hostinfo.cpu_type, &retryname[8], 10, 0);
|
||
if (p < retryname)
|
||
abort (); /* XXX write this right if this ever happens */
|
||
if (p > retryname)
|
||
strcpy (retryname, p);
|
||
startdir = *result;
|
||
}
|
||
else
|
||
goto bad_magic;
|
||
break;
|
||
|
||
case 't':
|
||
if (retryname[1] == 't' && retryname[2] == 'y')
|
||
switch (retryname[3])
|
||
{
|
||
error_t opentty (file_t *result)
|
||
{
|
||
error_t err;
|
||
error_t ctty_open (file_t port)
|
||
{
|
||
if (port == MACH_PORT_NULL)
|
||
return ENXIO; /* No controlling terminal. */
|
||
return __termctty_open_terminal (port,
|
||
flags,
|
||
result);
|
||
}
|
||
err = (*use_init_port) (INIT_PORT_CTTYID, &ctty_open);
|
||
if (! err)
|
||
err = reauthenticate (*result);
|
||
return err;
|
||
}
|
||
|
||
case '\0':
|
||
return opentty (result);
|
||
case '/':
|
||
if (err = opentty (&startdir))
|
||
return err;
|
||
strcpy (retryname, &retryname[4]);
|
||
break;
|
||
default:
|
||
goto bad_magic;
|
||
}
|
||
else
|
||
goto bad_magic;
|
||
break;
|
||
|
||
default:
|
||
bad_magic:
|
||
return EGRATUITOUS;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
return EGRATUITOUS;
|
||
}
|
||
|
||
if (startdir != MACH_PORT_NULL)
|
||
{
|
||
err = lookup_op (startdir);
|
||
__mach_port_deallocate (__mach_task_self (), startdir);
|
||
startdir = MACH_PORT_NULL;
|
||
}
|
||
else
|
||
err = (*use_init_port) (dirport, &lookup_op);
|
||
} while (! err);
|
||
|
||
return err;
|
||
}
|
||
weak_alias (__hurd_file_name_lookup_retry, hurd_file_name_lookup_retry)
|
||
|
||
error_t
|
||
__hurd_file_name_split (error_t (*use_init_port)
|
||
(int which, error_t (*operate) (file_t)),
|
||
file_t (*get_dtable_port) (int fd),
|
||
error_t (*lookup)
|
||
(file_t dir, char *name, int flags, mode_t mode,
|
||
retry_type *do_retry, string_t retry_name,
|
||
mach_port_t *result),
|
||
const char *file_name,
|
||
file_t *dir, char **name)
|
||
{
|
||
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, '/');
|
||
|
||
if (lastslash != NULL)
|
||
{
|
||
if (lastslash == file_name)
|
||
{
|
||
/* "/foobar" => crdir + "foobar". */
|
||
*name = (char *) file_name + 1;
|
||
return (*use_init_port) (INIT_PORT_CRDIR, &addref);
|
||
}
|
||
else
|
||
{
|
||
/* "/dir1/dir2/.../file". */
|
||
char dirname[lastslash - file_name + 1];
|
||
memcpy (dirname, file_name, lastslash - file_name);
|
||
dirname[lastslash - file_name] = '\0';
|
||
*name = (char *) lastslash + 1;
|
||
return
|
||
__hurd_file_name_lookup (use_init_port, get_dtable_port, lookup,
|
||
dirname, 0, 0, dir);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* "foobar" => cwdir + "foobar". */
|
||
*name = (char *) file_name;
|
||
return (*use_init_port) (INIT_PORT_CWDIR, &addref);
|
||
}
|
||
}
|
||
weak_alias (__hurd_file_name_split, hurd_file_name_split)
|
||
|
||
|
||
file_t
|
||
__file_name_lookup (const char *file_name, int flags, mode_t mode)
|
||
{
|
||
error_t err;
|
||
file_t result;
|
||
|
||
err = __hurd_file_name_lookup (&_hurd_ports_use, &__getdport, 0,
|
||
file_name, flags, mode & ~_hurd_umask,
|
||
&result);
|
||
|
||
return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
|
||
}
|
||
weak_alias (__file_name_lookup, file_name_lookup)
|
||
|
||
|
||
file_t
|
||
__file_name_split (const char *file_name, char **name)
|
||
{
|
||
error_t err;
|
||
file_t result;
|
||
|
||
err = __hurd_file_name_split (&_hurd_ports_use, &__getdport, 0,
|
||
file_name, &result, name);
|
||
|
||
return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
|
||
}
|
||
weak_alias (__file_name_split, file_name_split)
|
||
|
||
|
||
file_t
|
||
__file_name_lookup_under (file_t startdir,
|
||
const char *file_name, int flags, mode_t mode)
|
||
{
|
||
error_t err;
|
||
file_t result;
|
||
|
||
error_t use_init_port (int which, error_t (*operate) (mach_port_t))
|
||
{
|
||
return (which == INIT_PORT_CWDIR ? (*operate) (startdir) :
|
||
_hurd_ports_use (which, operate));
|
||
}
|
||
|
||
err = __hurd_file_name_lookup (&use_init_port, &__getdport, 0,
|
||
file_name, flags, mode & ~_hurd_umask,
|
||
&result);
|
||
|
||
return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
|
||
}
|
||
weak_alias (__file_name_lookup_under, file_name_lookup_under)
|