diff options
Diffstat (limited to 'source4/ntvfs/posix/pvfs_util.c')
| -rw-r--r-- | source4/ntvfs/posix/pvfs_util.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/source4/ntvfs/posix/pvfs_util.c b/source4/ntvfs/posix/pvfs_util.c new file mode 100644 index 0000000..6afb928 --- /dev/null +++ b/source4/ntvfs/posix/pvfs_util.c @@ -0,0 +1,206 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Andrew Tridgell 2004 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ +/* + utility functions for posix backend +*/ + +#include "includes.h" +#include "vfs_posix.h" + +/* + return true if a string contains one of the CIFS wildcard characters +*/ +bool pvfs_has_wildcard(const char *str) +{ + if (strpbrk(str, "*?<>\"")) { + return true; + } + return false; +} + +/* + map a unix errno to a NTSTATUS +*/ +NTSTATUS pvfs_map_errno(struct pvfs_state *pvfs, int unix_errno) +{ + NTSTATUS status; + status = map_nt_error_from_unix_common(unix_errno); + DEBUG(10,(__location__ " mapped unix errno %d -> %s\n", unix_errno, nt_errstr(status))); + return status; +} + + +/* + check if a filename has an attribute matching the given attribute search value + this is used by calls like unlink and search which take an attribute + and only include special files if they match the given attribute +*/ +NTSTATUS pvfs_match_attrib(struct pvfs_state *pvfs, struct pvfs_filename *name, + uint32_t attrib, uint32_t must_attrib) +{ + if ((name->dos.attrib & ~attrib) & FILE_ATTRIBUTE_DIRECTORY) { + return NT_STATUS_FILE_IS_A_DIRECTORY; + } + if ((name->dos.attrib & ~attrib) & (FILE_ATTRIBUTE_HIDDEN|FILE_ATTRIBUTE_SYSTEM)) { + return NT_STATUS_NO_SUCH_FILE; + } + if (must_attrib & ~name->dos.attrib) { + return NT_STATUS_OBJECT_NAME_NOT_FOUND; + } + return NT_STATUS_OK; +} + + +/* + normalise a file attribute +*/ +uint32_t pvfs_attrib_normalise(uint32_t attrib, mode_t mode) +{ + if (attrib != FILE_ATTRIBUTE_NORMAL) { + attrib &= ~FILE_ATTRIBUTE_NORMAL; + } + if (S_ISDIR(mode)) { + attrib |= FILE_ATTRIBUTE_DIRECTORY; + } else { + attrib &= ~FILE_ATTRIBUTE_DIRECTORY; + } + return attrib; +} + + +/* + copy a file. Caller is supposed to have already ensured that the + operation is allowed. The destination file must not exist. +*/ +NTSTATUS pvfs_copy_file(struct pvfs_state *pvfs, + struct pvfs_filename *name1, + struct pvfs_filename *name2, + bool allow_override) +{ + int fd1, fd2; + mode_t mode; + NTSTATUS status; + size_t buf_size = 0x10000; + uint8_t *buf = talloc_array(name2, uint8_t, buf_size); + + if (buf == NULL) { + return NT_STATUS_NO_MEMORY; + } + + fd1 = pvfs_sys_open(pvfs, name1->full_name, O_RDONLY, 0, allow_override); + if (fd1 == -1) { + talloc_free(buf); + return pvfs_map_errno(pvfs, errno); + } + + fd2 = pvfs_sys_open(pvfs, name2->full_name, O_CREAT|O_EXCL|O_WRONLY, 0, allow_override); + if (fd2 == -1) { + close(fd1); + talloc_free(buf); + return pvfs_map_errno(pvfs, errno); + } + + while (1) { + ssize_t ret2, ret = read(fd1, buf, buf_size); + if (ret == -1 && + (errno == EINTR || errno == EAGAIN)) { + continue; + } + if (ret <= 0) break; + + ret2 = write(fd2, buf, ret); + if (ret2 == -1 && + (errno == EINTR || errno == EAGAIN)) { + continue; + } + + if (ret2 != ret) { + close(fd1); + close(fd2); + talloc_free(buf); + pvfs_sys_unlink(pvfs, name2->full_name, allow_override); + if (ret2 == -1) { + return pvfs_map_errno(pvfs, errno); + } + return NT_STATUS_DISK_FULL; + } + } + + talloc_free(buf); + close(fd1); + + mode = pvfs_fileperms(pvfs, name1->dos.attrib); + if (pvfs_sys_fchmod(pvfs, fd2, mode, allow_override) == -1) { + status = pvfs_map_errno(pvfs, errno); + close(fd2); + pvfs_sys_unlink(pvfs, name2->full_name, allow_override); + return status; + } + + name2->st.st_mode = mode; + name2->dos = name1->dos; + + status = pvfs_dosattrib_save(pvfs, name2, fd2); + if (!NT_STATUS_IS_OK(status)) { + close(fd2); + pvfs_sys_unlink(pvfs, name2->full_name, allow_override); + return status; + } + + close(fd2); + + return NT_STATUS_OK; +} + + +/* + hash a string of the specified length. The string does not need to be + null terminated + + hash alghorithm changed to FNV1 by idra@samba.org (Simo Sorce). + see http://www.isthe.com/chongo/tech/comp/fnv/index.html for a + discussion on Fowler / Noll / Vo (FNV) Hash by one of it's authors +*/ +uint32_t pvfs_name_hash(const char *key, size_t length) +{ + const uint32_t fnv1_prime = 0x01000193; + const uint32_t fnv1_init = 0xa6b93095; + uint32_t value = fnv1_init; + + while (*key && length--) { + size_t c_size; + codepoint_t c = next_codepoint(key, &c_size); + c = toupper_m(c); + value *= fnv1_prime; + value ^= (uint32_t)c; + key += c_size; + } + + return value; +} + + +/* + file allocation size rounding. This is required to pass ifstest +*/ +uint64_t pvfs_round_alloc_size(struct pvfs_state *pvfs, uint64_t size) +{ + const uint32_t round_value = pvfs->alloc_size_rounding; + return round_value * ((size + round_value - 1)/round_value); +} |