2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2004
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 utility functions for posix backend
24 #include "vfs_posix.h"
27 return true if a string contains one of the CIFS wildcard characters
29 bool pvfs_has_wildcard(const char *str
)
31 if (strpbrk(str
, "*?<>\"")) {
38 map a unix errno to a NTSTATUS
40 NTSTATUS
pvfs_map_errno(struct pvfs_state
*pvfs
, int unix_errno
)
43 status
= map_nt_error_from_unix(unix_errno
);
44 DEBUG(10,(__location__
" mapped unix errno %d -> %s\n", unix_errno
, nt_errstr(status
)));
50 check if a filename has an attribute matching the given attribute search value
51 this is used by calls like unlink and search which take an attribute
52 and only include special files if they match the given attribute
54 NTSTATUS
pvfs_match_attrib(struct pvfs_state
*pvfs
, struct pvfs_filename
*name
,
55 uint32_t attrib
, uint32_t must_attrib
)
57 if ((name
->dos
.attrib
& ~attrib
) & FILE_ATTRIBUTE_DIRECTORY
) {
58 return NT_STATUS_FILE_IS_A_DIRECTORY
;
60 if ((name
->dos
.attrib
& ~attrib
) & (FILE_ATTRIBUTE_HIDDEN
|FILE_ATTRIBUTE_SYSTEM
)) {
61 return NT_STATUS_NO_SUCH_FILE
;
63 if (must_attrib
& ~name
->dos
.attrib
) {
64 return NT_STATUS_OBJECT_NAME_NOT_FOUND
;
71 normalise a file attribute
73 uint32_t pvfs_attrib_normalise(uint32_t attrib
, mode_t mode
)
75 if (attrib
!= FILE_ATTRIBUTE_NORMAL
) {
76 attrib
&= ~FILE_ATTRIBUTE_NORMAL
;
79 attrib
|= FILE_ATTRIBUTE_DIRECTORY
;
81 attrib
&= ~FILE_ATTRIBUTE_DIRECTORY
;
88 copy a file. Caller is supposed to have already ensured that the
89 operation is allowed. The destination file must not exist.
91 NTSTATUS
pvfs_copy_file(struct pvfs_state
*pvfs
,
92 struct pvfs_filename
*name1
,
93 struct pvfs_filename
*name2
)
98 size_t buf_size
= 0x10000;
99 uint8_t *buf
= talloc_array(name2
, uint8_t, buf_size
);
102 return NT_STATUS_NO_MEMORY
;
105 fd1
= pvfs_sys_open(pvfs
, name1
->full_name
, O_RDONLY
, 0);
108 return pvfs_map_errno(pvfs
, errno
);
111 fd2
= pvfs_sys_open(pvfs
, name2
->full_name
, O_CREAT
|O_EXCL
|O_WRONLY
, 0);
115 return pvfs_map_errno(pvfs
, errno
);
119 ssize_t ret2
, ret
= read(fd1
, buf
, buf_size
);
121 (errno
== EINTR
|| errno
== EAGAIN
)) {
126 ret2
= write(fd2
, buf
, ret
);
128 (errno
== EINTR
|| errno
== EAGAIN
)) {
136 pvfs_sys_unlink(pvfs
, name2
->full_name
);
138 return pvfs_map_errno(pvfs
, errno
);
140 return NT_STATUS_DISK_FULL
;
147 mode
= pvfs_fileperms(pvfs
, name1
->dos
.attrib
);
148 if (pvfs_sys_fchmod(pvfs
, fd2
, mode
) == -1) {
149 status
= pvfs_map_errno(pvfs
, errno
);
151 pvfs_sys_unlink(pvfs
, name2
->full_name
);
155 name2
->st
.st_mode
= mode
;
156 name2
->dos
= name1
->dos
;
158 status
= pvfs_dosattrib_save(pvfs
, name2
, fd2
);
159 if (!NT_STATUS_IS_OK(status
)) {
161 pvfs_sys_unlink(pvfs
, name2
->full_name
);
172 hash a string of the specified length. The string does not need to be
175 hash alghorithm changed to FNV1 by idra@samba.org (Simo Sorce).
176 see http://www.isthe.com/chongo/tech/comp/fnv/index.html for a
177 discussion on Fowler / Noll / Vo (FNV) Hash by one of it's authors
179 uint32_t pvfs_name_hash(const char *key
, size_t length
)
181 const uint32_t fnv1_prime
= 0x01000193;
182 const uint32_t fnv1_init
= 0xa6b93095;
183 uint32_t value
= fnv1_init
;
185 while (*key
&& length
--) {
187 codepoint_t c
= next_codepoint(key
, &c_size
);
190 value
^= (uint32_t)c
;
199 file allocation size rounding. This is required to pass ifstest
201 uint64_t pvfs_round_alloc_size(struct pvfs_state
*pvfs
, uint64_t size
)
203 const uint32_t round_value
= pvfs
->alloc_size_rounding
;
204 return round_value
* ((size
+ round_value
- 1)/round_value
);