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116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/* Lookup helper function for Hurd implementation of *at functions.
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Copyright (C) 2006-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <hurd.h>
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#include <hurd/lookup.h>
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#include <hurd/fd.h>
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#include <string.h>
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#include <fcntl.h>
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file_t
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__file_name_lookup_at (int fd, int at_flags,
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const char *file_name, int flags, mode_t mode)
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{
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error_t err;
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file_t result;
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if ((at_flags & AT_SYMLINK_FOLLOW) && (at_flags & AT_SYMLINK_NOFOLLOW))
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return (__hurd_fail (EINVAL), MACH_PORT_NULL);
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flags |= (at_flags & AT_SYMLINK_NOFOLLOW) ? O_NOLINK : 0;
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at_flags &= ~AT_SYMLINK_NOFOLLOW;
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if (at_flags & AT_SYMLINK_FOLLOW)
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flags &= ~O_NOLINK;
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at_flags &= ~AT_SYMLINK_FOLLOW;
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if (at_flags != 0)
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return (__hurd_fail (EINVAL), MACH_PORT_NULL);
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if (fd == AT_FDCWD || file_name[0] == '/')
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return __file_name_lookup (file_name, flags, mode);
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file_t startdir;
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error_t use_init_port (int which, error_t (*operate) (mach_port_t))
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{
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return (which == INIT_PORT_CWDIR ? (*operate) (startdir) :
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_hurd_ports_use (which, operate));
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}
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err = HURD_DPORT_USE (fd, (startdir = port,
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__hurd_file_name_lookup (&use_init_port,
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&__getdport, NULL,
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file_name,
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flags,
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mode & ~_hurd_umask,
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&result)));
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return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result;
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}
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file_t
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__file_name_split_at (int fd, const char *file_name, char **name)
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{
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error_t err;
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file_t result;
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if (fd == AT_FDCWD || file_name[0] == '/')
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return __file_name_split (file_name, name);
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err = __hurd_file_name_split (&_hurd_ports_use, &__getdport, 0,
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file_name, &result, name);
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file_t startdir;
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error_t use_init_port (int which, error_t (*operate) (mach_port_t))
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{
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return (which == INIT_PORT_CWDIR ? (*operate) (startdir) :
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_hurd_ports_use (which, operate));
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}
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err = HURD_DPORT_USE (fd, (startdir = port,
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__hurd_file_name_split (&use_init_port,
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&__getdport, 0,
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file_name,
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&result, name)));
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return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result;
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}
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file_t
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__directory_name_split_at (int fd, const char *directory_name, char **name)
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{
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error_t err;
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file_t result;
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if (fd == AT_FDCWD || directory_name[0] == '/')
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return __directory_name_split (directory_name, name);
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file_t startdir;
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error_t use_init_port (int which, error_t (*operate) (mach_port_t))
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{
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return (which == INIT_PORT_CWDIR ? (*operate) (startdir) :
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_hurd_ports_use (which, operate));
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}
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err = HURD_DPORT_USE (fd, (startdir = port,
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__hurd_directory_name_split (&use_init_port,
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&__getdport, 0,
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directory_name,
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&result, name)));
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return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result;
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}
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