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glibc-1.08.1
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hurd
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hurdpath.c
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1994-04-19
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/* Copyright (C) 1992, 1993, 1994 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 <string.h>
#include <limits.h>
#include <fcntl.h>
error_t
__hurd_path_lookup (file_t crdir, file_t cwdir,
const char *path, int flags, mode_t mode,
file_t *result)
{
error_t err;
file_t startdir;
enum retry_type doretry;
char retryname[1024]; /* XXX string_t LOSES! */
file_t newpt;
int dealloc_dir;
int nloops;
if (*path == '/')
{
startdir = crdir;
while (*path == '/')
++path;
}
else
startdir = cwdir;
dealloc_dir = 0;
nloops = 0;
for (;;)
{
err = __dir_pathtrans (startdir, (char *) path, flags, mode,
&doretry, retryname, result);
if (dealloc_dir)
__mach_port_deallocate (__mach_task_self (), startdir);
if (err)
return err;
switch (doretry)
{
case FS_RETRY_NONE:
/* We got a successful translation. Now apply any
open-time action flags we were passed. */
if (flags & O_EXLOCK)
; /* XXX */
if (!err && (flags & O_SHLOCK))
; /* XXX */
if (!err && (flags & O_TRUNC))
err = __file_truncate (*result, 0);
if (err)
__mach_port_deallocate (__mach_task_self (), *result);
return err;
case FS_RETRY_REAUTH:
__io_reauthenticate (*result, _hurd_pid);
__USEPORT (AUTH, __auth_user_authenticate (port, *result, _hurd_pid,
&newpt));
__mach_port_deallocate (__mach_task_self (), *result);
*result = newpt;
/* Fall through. */
case FS_RETRY_NORMAL:
#ifdef SYMLOOP_MAX
if (nloops++ >= SYMLOOP_MAX)
return ELOOP;
#endif
if (retryname[0] == '/')
{
startdir = crdir;
dealloc_dir = 0;
path = retryname;
do
++path;
while (*path == '/');
}
else
{
startdir = *result;
dealloc_dir = 1;
path = retryname;
}
break;
/* case FS_RETRY_MAGICAL: XXX */
}
}
}
error_t
__hurd_path_split (file_t crdir, file_t cwdir,
const char *path,
file_t *dir, char **name)
{
const char *lastslash;
error_t err;
/* Skip leading slashes in the pathname. */
if (*path == '/')
{
while (*path == '/')
++path;
--path; /* Leave on one slash. */
}
lastslash = strrchr (path, '/');
if (lastslash != NULL)
{
if (lastslash == path)
{
/* "/foobar" => crdir + "foobar". */
*name = (char *) path + 1;
if (err = __mach_port_mod_refs (__mach_task_self (),
crdir, MACH_PORT_RIGHT_SEND, +1))
return err;
*dir = crdir;
return 0;
}
else
{
/* "/dir1/dir2/.../file". */
char dirname[lastslash - path + 1];
memcpy (dirname, path, lastslash - path);
dirname[lastslash - path] = '\0';
*name = (char *) lastslash + 1;
return __hurd_path_lookup (crdir, cwdir, dirname, 0, 0, dir);
}
}
else
{
/* "foobar" => cwdir + "foobar". */
*name = (char *) path;
if (err = __mach_port_mod_refs (__mach_task_self (),
cwdir, MACH_PORT_RIGHT_SEND, +1))
return err;
*dir = cwdir;
return 0;
}
}
file_t
__path_lookup (const char *path, 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);
err = __hurd_path_lookup (crdir, cwdir, path, 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)
{
errno = err;
return MACH_PORT_NULL;
}
else
return result;
}
file_t
__path_split (const char *path, char **name)
{
error_t err;
file_t dir, 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);
err = __hurd_path_split (crdir, cwdir, path, &dir, name);
_hurd_port_free (&_hurd_ports[INIT_PORT_CRDIR], &crdir_ulink, crdir);
_hurd_port_free (&_hurd_ports[INIT_PORT_CWDIR], &cwdir_ulink, cwdir);
if (err)
{
errno = err;
return MACH_PORT_NULL;
}
else
return dir;
}