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)
42 return map_nt_error_from_unix(unix_errno);
47 check if a filename has an attribute matching the given attribute search value
48 this is used by calls like unlink and search which take an attribute
49 and only include special files if they match the given attribute
51 NTSTATUS pvfs_match_attrib(struct pvfs_state *pvfs, struct pvfs_filename *name,
52 uint32_t attrib, uint32_t must_attrib)
54 if ((name->dos.attrib & ~attrib) & FILE_ATTRIBUTE_DIRECTORY) {
55 return NT_STATUS_FILE_IS_A_DIRECTORY;
57 if ((name->dos.attrib & ~attrib) & (FILE_ATTRIBUTE_HIDDEN|FILE_ATTRIBUTE_SYSTEM)) {
58 return NT_STATUS_NO_SUCH_FILE;
60 if (must_attrib & ~name->dos.attrib) {
61 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
68 normalise a file attribute
70 uint32_t pvfs_attrib_normalise(uint32_t attrib, mode_t mode)
72 if (attrib != FILE_ATTRIBUTE_NORMAL) {
73 attrib &= ~FILE_ATTRIBUTE_NORMAL;
76 attrib |= FILE_ATTRIBUTE_DIRECTORY;
78 attrib &= ~FILE_ATTRIBUTE_DIRECTORY;
85 copy a file. Caller is supposed to have already ensured that the
86 operation is allowed. The destination file must not exist.
88 NTSTATUS pvfs_copy_file(struct pvfs_state *pvfs,
89 struct pvfs_filename *name1,
90 struct pvfs_filename *name2)
95 size_t buf_size = 0x10000;
96 char *buf = talloc_size(name2, buf_size);
99 return NT_STATUS_NO_MEMORY;
102 fd1 = open(name1->full_name, O_RDONLY);
105 return pvfs_map_errno(pvfs, errno);
108 fd2 = open(name2->full_name, O_CREAT|O_EXCL|O_WRONLY, 0);
112 return pvfs_map_errno(pvfs, errno);
116 ssize_t ret2, ret = read(fd1, buf, buf_size);
118 (errno == EINTR || errno == EAGAIN)) {
123 ret2 = write(fd2, buf, ret);
125 (errno == EINTR || errno == EAGAIN)) {
133 unlink(name2->full_name);
135 return pvfs_map_errno(pvfs, errno);
137 return NT_STATUS_DISK_FULL;
144 mode = pvfs_fileperms(pvfs, name1->dos.attrib);
145 if (fchmod(fd2, mode) == -1) {
146 status = pvfs_map_errno(pvfs, errno);
148 unlink(name2->full_name);
152 name2->st.st_mode = mode;
153 name2->dos = name1->dos;
155 status = pvfs_dosattrib_save(pvfs, name2, fd2);
156 if (!NT_STATUS_IS_OK(status)) {
158 unlink(name2->full_name);
169 hash a string of the specified length. The string does not need to be
172 hash alghorithm changed to FNV1 by idra@samba.org (Simo Sorce).
173 see http://www.isthe.com/chongo/tech/comp/fnv/index.html for a
174 discussion on Fowler / Noll / Vo (FNV) Hash by one of it's authors
176 uint32_t pvfs_name_hash(const char *key, size_t length)
178 const uint32_t fnv1_prime = 0x01000193;
179 const uint32_t fnv1_init = 0xa6b93095;
180 uint32_t value = fnv1_init;
182 while (*key && length--) {
184 codepoint_t c = next_codepoint(key, &c_size);
187 value ^= (uint32_t)c;
196 file allocation size rounding. This is required to pass ifstest
198 uint64_t pvfs_round_alloc_size(struct pvfs_state *pvfs, uint64_t size)
200 const uint32_t round_value = pvfs->alloc_size_rounding;
201 return round_value * ((size + round_value - 1)/round_value);