diff options
Diffstat (limited to 'winsup/cygwin/fhandler_disk_file.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_disk_file.cc | 2130 |
1 files changed, 0 insertions, 2130 deletions
diff --git a/winsup/cygwin/fhandler_disk_file.cc b/winsup/cygwin/fhandler_disk_file.cc deleted file mode 100644 index 4899c9aac..000000000 --- a/winsup/cygwin/fhandler_disk_file.cc +++ /dev/null @@ -1,2130 +0,0 @@ -/* fhandler_disk_file.cc - - Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, - 2005, 2006 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <unistd.h> -#include <stdlib.h> -#include <sys/cygwin.h> -#include <sys/acl.h> -#include <signal.h> -#include "cygerrno.h" -#include "perprocess.h" -#include "security.h" -#include "cygwin/version.h" -#include "path.h" -#include "fhandler.h" -#include "dtable.h" -#include "cygheap.h" -#include "shared_info.h" -#include "pinfo.h" -#include <ntdef.h> -#include "ntdll.h" -#include <assert.h> -#include <ctype.h> -#include <winioctl.h> - -#define _COMPILING_NEWLIB -#include <dirent.h> - -class __DIR_mounts -{ - int count; - const char *parent_dir; - int parent_dir_len; - char *mounts[MAX_MOUNTS]; - bool found[MAX_MOUNTS + 2]; - -#define __DIR_PROC (MAX_MOUNTS) -#define __DIR_CYGDRIVE (MAX_MOUNTS+1) - - __ino64_t eval_ino (int idx) - { - __ino64_t ino = 0; - char fname[CYG_MAX_PATH]; - struct __stat64 st; - int len = parent_dir_len; - - strcpy (fname, parent_dir); - if (fname[len - 1] != '/') - fname[len++] = '/'; - strcpy (fname + len, mounts[idx]); - if (!lstat64 (fname, &st)) - ino = st.st_ino; - return ino; - } - -public: - __DIR_mounts (const char *posix_path) - : parent_dir (posix_path) - { - parent_dir_len = strlen (parent_dir); - count = mount_table->get_mounts_here (parent_dir, parent_dir_len, mounts); - rewind (); - } - __ino64_t check_mount (const char *name, __ino64_t ino, bool eval = true) - { - if (parent_dir_len == 1) /* root dir */ - { - if (strcasematch (name, "proc")) - { - found[__DIR_PROC] = true; - return hash_path_name (0, "/proc"); - } - if (strlen (name) == mount_table->cygdrive_len - 2 - && strncasematch (name, mount_table->cygdrive + 1, - mount_table->cygdrive_len - 2)) - { - found[__DIR_CYGDRIVE] = true; - return 2; - } - } - for (int i = 0; i < count; ++i) - if (strcasematch (name, mounts[i])) - { - found[i] = true; - return eval ? eval_ino (i) : 1; - } - return ino; - } - __ino64_t check_missing_mount (char *ret_name, bool eval = true) - { - for (int i = 0; i < count; ++i) - if (!found[i]) - { - found[i] = true; - strcpy (ret_name, mounts[i]); - return eval ? eval_ino (i) : 1; - } - if (parent_dir_len == 1) /* root dir */ - { - if (!found[__DIR_PROC]) - { - found[__DIR_PROC] = true; - strcpy (ret_name, "proc"); - return hash_path_name (0, "/proc"); - } - if (!found[__DIR_CYGDRIVE]) - { - found[__DIR_CYGDRIVE] = true; - if (mount_table->cygdrive_len > 1) - { - strncpy (ret_name, mount_table->cygdrive + 1, - mount_table->cygdrive_len - 2); - ret_name[mount_table->cygdrive_len - 2] = '\0'; - return 2; - } - } - } - return 0; - } - void rewind () { memset (found, 0, sizeof found); } -}; - -unsigned __stdcall -path_conv::ndisk_links (DWORD nNumberOfLinks) -{ - if (!isdir () || isremote ()) - return nNumberOfLinks; - - int len = strlen (*this); - char fn[len + 3]; - strcpy (fn, *this); - - const char *s; - unsigned count; - __DIR_mounts *dir = new __DIR_mounts (normalized_path); - if (nNumberOfLinks <= 1) - { - s = "\\*"; - count = 0; - } - else - { - s = "\\.."; - count = nNumberOfLinks; - } - - if (len == 0 || isdirsep (fn[len - 1])) - strcpy (fn + len, s + 1); - else - strcpy (fn + len, s); - - WIN32_FIND_DATA buf; - HANDLE h = FindFirstFile (fn, &buf); - - int saw_dot = 2; - if (h != INVALID_HANDLE_VALUE) - { - if (nNumberOfLinks > 1) - saw_dot--; - else - do - { - if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) - count++; - if (buf.cFileName[0] == '.' - && (buf.cFileName[1] == '\0' - || (buf.cFileName[1] == '.' && buf.cFileName[2] == '\0'))) - saw_dot--; - dir->check_mount (buf.cFileName, 0, false); - } - while (FindNextFileA (h, &buf)); - FindClose (h); - } - - if (nNumberOfLinks > 1) - { - fn[len + 2] = '\0'; - h = FindFirstFile (fn, &buf); - if (h) - saw_dot--; - FindClose (h); - } - while (dir->check_missing_mount (buf.cFileName, false)) - ++count; - - delete dir; - - return count + saw_dot; -} - -inline bool -path_conv::isgood_inode (__ino64_t ino) const -{ - /* We can't trust remote inode numbers of only 32 bit. That means, - all remote inode numbers when running under NT4, as well as remote NT4 - NTFS, as well as shares of Samba version < 3.0. - The known exception are SFU NFS shares, which return the valid 32 bit - inode number from the remote file system unchanged. */ - return hasgood_inode () && (ino > UINT32_MAX || !isremote () || fs_is_nfs ()); -} - -int __stdcall -fhandler_base::fstat_by_handle (struct __stat64 *buf) -{ - BY_HANDLE_FILE_INFORMATION local; - - if (wincap.is_winnt ()) - { - NTSTATUS status; - IO_STATUS_BLOCK io; - /* The entries potentially contain a name of MAX_PATH wide characters. */ - const DWORD fvi_size = 2 * CYG_MAX_PATH - + sizeof (FILE_FS_VOLUME_INFORMATION); - const DWORD fai_size = 2 * CYG_MAX_PATH + sizeof (FILE_ALL_INFORMATION); - - PFILE_FS_VOLUME_INFORMATION pfvi = (PFILE_FS_VOLUME_INFORMATION) - alloca (fvi_size); - PFILE_ALL_INFORMATION pfai = (PFILE_ALL_INFORMATION) alloca (fai_size); - - status = NtQueryVolumeInformationFile (get_handle (), &io, pfvi, fvi_size, - FileFsVolumeInformation); - if (!NT_SUCCESS (status)) - { - debug_printf ("%u = NtQueryVolumeInformationFile)", - RtlNtStatusToDosError (status)); - pfvi->VolumeSerialNumber = 0; /* Set to pc.volser () in helper. */ - } - status = NtQueryInformationFile (get_handle (), &io, pfai, fai_size, - FileAllInformation); - if (NT_SUCCESS (status)) - { - /* If the change time is 0, it's a file system which doesn't - support a change timestamp. In that case use the LastWriteTime - entry, as in other calls to fstat_helper. */ - if (pc.is_rep_symlink ()) - pfai->BasicInformation.FileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY; - pc.file_attributes (pfai->BasicInformation.FileAttributes); - return fstat_helper (buf, - pfai->BasicInformation.ChangeTime.QuadPart ? - *(FILETIME *) &pfai->BasicInformation.ChangeTime : - *(FILETIME *) &pfai->BasicInformation.LastWriteTime, - *(FILETIME *) &pfai->BasicInformation.LastAccessTime, - *(FILETIME *) &pfai->BasicInformation.LastWriteTime, - pfvi->VolumeSerialNumber, - pfai->StandardInformation.EndOfFile.QuadPart, - pfai->StandardInformation.AllocationSize.QuadPart, - pfai->InternalInformation.FileId.QuadPart, - pfai->StandardInformation.NumberOfLinks, - pfai->BasicInformation.FileAttributes); - } - - debug_printf ("%u = NtQueryInformationFile)", - RtlNtStatusToDosError (status)); - } - - BOOL res = GetFileInformationByHandle (get_handle (), &local); - debug_printf ("%d = GetFileInformationByHandle (%s, %d)", - res, get_win32_name (), get_handle ()); - /* GetFileInformationByHandle will fail if it's given stdio handle or pipe. - It also fails on 9x when trying to access directories on shares. */ - if (!res) - { - memset (&local, 0, sizeof (local)); - local.nFileSizeLow = GetFileSize (get_handle (), &local.nFileSizeHigh); - /* Even GetFileSize fails on 9x when trying to access directories - on shares. In this case reset filesize to 0. */ - if (local.nFileSizeLow == 0xffffffff && GetLastError ()) - local.nFileSizeLow = 0; - local.dwFileAttributes = DWORD (pc); - } - else - { - if (pc.is_rep_symlink ()) - local.dwFileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY; - pc.file_attributes (local.dwFileAttributes); - } - return fstat_helper (buf, - local.ftLastWriteTime, /* see fstat_helper comment */ - local.ftLastAccessTime, - local.ftLastWriteTime, - local.dwVolumeSerialNumber, - (ULONGLONG) local.nFileSizeHigh << 32 - | local.nFileSizeLow, - -1LL, - (ULONGLONG) local.nFileIndexHigh << 32 - | local.nFileIndexLow, - local.nNumberOfLinks, - local.dwFileAttributes); -} - -int __stdcall -fhandler_base::fstat_by_name (struct __stat64 *buf) -{ - int res; - HANDLE handle; - WIN32_FIND_DATA local; - - if (!pc.exists ()) - { - debug_printf ("already determined that pc does not exist"); - set_errno (ENOENT); - res = -1; - } - else if ((handle = FindFirstFile (pc, &local)) != INVALID_HANDLE_VALUE) - { - FindClose (handle); - if (pc.is_rep_symlink ()) - local.dwFileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY; - pc.file_attributes (local.dwFileAttributes); - res = fstat_helper (buf, - local.ftLastWriteTime, /* see fstat_helper comment */ - local.ftLastAccessTime, - local.ftLastWriteTime, - pc.volser (), - (ULONGLONG) local.nFileSizeHigh << 32 - | local.nFileSizeLow, - -1LL, - 0ULL, - 1, - local.dwFileAttributes); - } - else if (pc.isdir ()) - { - FILETIME ft = {}; - res = fstat_helper (buf, ft, ft, ft, pc.volser (), 0ULL, -1LL, 0ULL, 1, - FILE_ATTRIBUTE_DIRECTORY); - } - else - { - debug_printf ("FindFirstFile failed for '%s', %E", (char *) pc); - __seterrno (); - res = -1; - } - return res; -} - -int __stdcall -fhandler_base::fstat_fs (struct __stat64 *buf) -{ - int res = -1; - int oret; - int open_flags = O_RDONLY | O_BINARY; - - if (get_io_handle ()) - { - if (nohandle () || is_fs_special ()) - return fstat_by_name (buf); - else - return fstat_by_handle (buf); - } - /* If we don't care if the file is executable or we already know if it is, - then just do a "query open" as it is apparently much faster. */ - if (pc.exec_state () != dont_know_if_executable) - { - if (pc.fs_is_fat () && !strpbrk (get_win32_name (), "?*|<>")) - return fstat_by_name (buf); - query_open (query_stat_control); - } - if (!(oret = open_fs (open_flags, 0)) && get_errno () == EACCES) - { - /* If we couldn't open the file, try a query open with no permissions. - This allows us to determine *some* things about the file, at least. */ - pc.set_exec (0); - query_open (query_read_control); - oret = open_fs (open_flags, 0); - } - - if (oret) - { - /* We now have a valid handle, regardless of the "nohandle" state. - Since fhandler_base::open only calls CloseHandle if !nohandle, - we have to set it to false before calling close_fs and restore - the state afterwards. */ - res = fstat_by_handle (buf); - bool no_handle = nohandle (); - nohandle (false); - close_fs (); - nohandle (no_handle); - set_io_handle (NULL); - } - else - res = fstat_by_name (buf); - - return res; -} - -/* The ftChangeTime is taken from the NTFS ChangeTime entry, if reading - the file information using NtQueryInformationFile succeeded. If not, - it's faked using the LastWriteTime entry from GetFileInformationByHandle - or FindFirstFile. We're deliberatly not using the creation time anymore - to simplify interaction with native Windows applications which choke on - creation times >= access or write times. - - Note that the dwFileAttributes member of the file information evaluated - in the calling function is used here, not the pc.fileattr member, since - the latter might be old and not reflect the actual state of the file. */ -int __stdcall -fhandler_base::fstat_helper (struct __stat64 *buf, - FILETIME ftChangeTime, - FILETIME ftLastAccessTime, - FILETIME ftLastWriteTime, - DWORD dwVolumeSerialNumber, - ULONGLONG nFileSize, - LONGLONG nAllocSize, - ULONGLONG nFileIndex, - DWORD nNumberOfLinks, - DWORD dwFileAttributes) -{ - IO_STATUS_BLOCK st; - FILE_COMPRESSION_INFORMATION fci; - - to_timestruc_t (&ftLastAccessTime, &buf->st_atim); - to_timestruc_t (&ftLastWriteTime, &buf->st_mtim); - to_timestruc_t (&ftChangeTime, &buf->st_ctim); - buf->st_dev = dwVolumeSerialNumber ?: pc.volser (); - buf->st_size = (_off64_t) nFileSize; - /* The number of links to a directory includes the - number of subdirectories in the directory, since all - those subdirectories point to it. - This is too slow on remote drives, so we do without it. - Setting the count to 2 confuses `find (1)' command. So - let's try it with `1' as link count. */ - buf->st_nlink = pc.ndisk_links (nNumberOfLinks); - - /* Enforce namehash as inode number on untrusted file systems. */ - if (pc.isgood_inode (nFileIndex)) - buf->st_ino = (__ino64_t) nFileIndex; - else - buf->st_ino = get_namehash (); - - buf->st_blksize = S_BLKSIZE; - - if (nAllocSize >= 0LL) - /* A successful NtQueryInformationFile returns the allocation size - correctly for compressed and sparse files as well. */ - buf->st_blocks = (nAllocSize + S_BLKSIZE - 1) / S_BLKSIZE; - else if (::has_attribute (dwFileAttributes, FILE_ATTRIBUTE_COMPRESSED - | FILE_ATTRIBUTE_SPARSE_FILE) - && get_io_handle () && !is_fs_special () - && !NtQueryInformationFile (get_io_handle (), &st, (PVOID) &fci, - sizeof fci, FileCompressionInformation)) - /* Otherwise we request the actual amount of bytes allocated for - compressed and sparsed files. */ - buf->st_blocks = (fci.CompressedSize.QuadPart + S_BLKSIZE - 1) / S_BLKSIZE; - else - /* Otherwise compute no. of blocks from file size. */ - buf->st_blocks = (buf->st_size + S_BLKSIZE - 1) / S_BLKSIZE; - - buf->st_mode = 0; - /* Using a side effect: get_file_attibutes checks for - directory. This is used, to set S_ISVTX, if needed. */ - if (pc.isdir ()) - buf->st_mode = S_IFDIR; - else if (pc.issymlink ()) - { - buf->st_size = pc.get_symlink_length (); - /* symlinks are everything for everyone! */ - buf->st_mode = S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO; - get_file_attribute (pc.has_acls (), get_io_handle (), get_win32_name (), - NULL, &buf->st_uid, &buf->st_gid); - goto done; - } - else if (pc.issocket ()) - buf->st_mode = S_IFSOCK; - - if (!get_file_attribute (pc.has_acls (), - is_fs_special () ? NULL: get_io_handle (), - get_win32_name (), &buf->st_mode, - &buf->st_uid, &buf->st_gid)) - { - /* If read-only attribute is set, modify ntsec return value */ - if (::has_attribute (dwFileAttributes, FILE_ATTRIBUTE_READONLY) - && !pc.issymlink ()) - buf->st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH); - - if (buf->st_mode & S_IFMT) - /* nothing */; - else if (!is_fs_special ()) - buf->st_mode |= S_IFREG; - else - { - buf->st_dev = dev (); - buf->st_mode = dev ().mode; - buf->st_size = 0; - } - } - else - { - buf->st_mode |= STD_RBITS; - - if (!::has_attribute (dwFileAttributes, FILE_ATTRIBUTE_READONLY) - && !pc.issymlink ()) - buf->st_mode |= STD_WBITS; - /* | S_IWGRP | S_IWOTH; we don't give write to group etc */ - - if (S_ISDIR (buf->st_mode)) - buf->st_mode |= S_IFDIR | STD_XBITS; - else if (buf->st_mode & S_IFMT) - /* nothing */; - else if (is_fs_special ()) - { - buf->st_dev = dev (); - buf->st_mode = dev ().mode; - buf->st_size = 0; - } - else - { - buf->st_mode |= S_IFREG; - if (pc.exec_state () == dont_know_if_executable) - { - DWORD cur, done; - char magic[3]; - - /* First retrieve current position, set to beginning - of file if not already there. */ - cur = SetFilePointer (get_handle (), 0, NULL, FILE_CURRENT); - if (cur != INVALID_SET_FILE_POINTER - && (!cur || SetFilePointer (get_handle (), 0, NULL, FILE_BEGIN) - != INVALID_SET_FILE_POINTER)) - { - /* FIXME should we use /etc/magic ? */ - magic[0] = magic[1] = magic[2] = '\0'; - if (ReadFile (get_handle (), magic, 3, &done, NULL) - && has_exec_chars (magic, done)) - { - pc.set_exec (); - buf->st_mode |= STD_XBITS; - } - SetFilePointer (get_handle (), cur, NULL, FILE_BEGIN); - } - } - } - - if (pc.exec_state () == is_executable) - buf->st_mode |= STD_XBITS; - - /* This fakes the permissions of all files to match the current umask. */ - buf->st_mode &= ~(cygheap->umask); - } - - done: - syscall_printf ("0 = fstat (, %p) st_atime=%x st_size=%D, st_mode=%p, st_ino=%D, sizeof=%d", - buf, buf->st_atime, buf->st_size, buf->st_mode, - buf->st_ino, sizeof (*buf)); - return 0; -} - -int __stdcall -fhandler_disk_file::fstat (struct __stat64 *buf) -{ - /* Changing inode data requires setting ctime (only 9x). */ - if (has_changed ()) - touch_ctime (); - return fstat_fs (buf); -} - -void -fhandler_disk_file::touch_ctime () -{ - FILETIME ft; - - GetSystemTimeAsFileTime (&ft); - /* Modification time is touched if the file data has changed as well. - This happens for instance on write() or ftruncate(). */ - if (!SetFileTime (get_io_handle (), NULL, NULL, &ft)) - debug_printf ("SetFileTime (%s) failed, %E", get_win32_name ()); - else - has_changed (false); -} - -int __stdcall -fhandler_disk_file::fchmod (mode_t mode) -{ - extern int chmod_device (path_conv& pc, mode_t mode); - int res = -1; - int oret = 0; - - if (pc.is_fs_special ()) - return chmod_device (pc, mode); - - /* Also open on 9x, otherwise we can't touch ctime. */ - if (!get_io_handle ()) - { - query_open (query_write_control); - if (!(oret = open (O_BINARY, 0))) - { - /* If the file couldn't be opened, that's really only a problem if - ACLs or EAs should get written. */ - if ((allow_ntsec && pc.has_acls ()) || allow_ntea) - return -1; - } - } - - if ((allow_ntsec && pc.has_acls ()) || allow_ntea) - { - if (!allow_ntsec && allow_ntea) /* Not necessary when manipulating SD. */ - SetFileAttributes (pc, (DWORD) pc & ~FILE_ATTRIBUTE_READONLY); - if (pc.isdir ()) - mode |= S_IFDIR; - if (!set_file_attribute (pc.has_acls (), get_io_handle (), pc, - ILLEGAL_UID, ILLEGAL_GID, mode) - && allow_ntsec) - res = 0; - } - - /* if the mode we want has any write bits set, we can't be read only. */ - if (mode & (S_IWUSR | S_IWGRP | S_IWOTH)) - pc &= (DWORD) ~FILE_ATTRIBUTE_READONLY; - else - pc |= (DWORD) FILE_ATTRIBUTE_READONLY; - - if (!SetFileAttributes (pc, pc)) - __seterrno (); - else if (!allow_ntsec || !pc.has_acls ()) - /* Correct NTFS security attributes have higher priority */ - res = 0; - - /* Set ctime on success. */ - if (!res && !wincap.is_winnt ()) - has_changed (true); - - if (oret) - close (); - - return res; -} - -int __stdcall -fhandler_disk_file::fchown (__uid32_t uid, __gid32_t gid) -{ - int oret = 0; - - if (!pc.has_acls () || !allow_ntsec) - { - /* fake - if not supported, pretend we're like win95 - where it just works */ - return 0; - } - - if (!get_io_handle ()) - { - query_open (query_write_control); - if (!(oret = fhandler_disk_file::open (O_BINARY, 0))) - return -1; - } - - mode_t attrib = 0; - if (pc.isdir ()) - attrib |= S_IFDIR; - int res = get_file_attribute (pc.has_acls (), get_io_handle (), pc, &attrib); - if (!res) - { - /* Typical Windows default ACLs can contain permissions for one - group, while being owned by another user/group. The permission - bits returned above are pretty much useless then. Creating a - new ACL with these useless permissions results in a potentially - broken symlink. So what we do here is to set the underlying - permissions of symlinks to a sensible value which allows the - world to read the symlink and only the new owner to change it. */ - if (pc.issymlink ()) - attrib = S_IFLNK | STD_RBITS | STD_WBITS; - res = set_file_attribute (pc.has_acls (), get_io_handle (), pc, - uid, gid, attrib); - } - if (oret) - close (); - - return res; -} - -int _stdcall -fhandler_disk_file::facl (int cmd, int nentries, __aclent32_t *aclbufp) -{ - int res = -1; - int oret = 0; - - if (!pc.has_acls () || !allow_ntsec) - { - switch (cmd) - { - struct __stat64 st; - - case SETACL: - /* Open for writing required to be able to set ctime - (even though setting the ACL is just pretended). */ - if (!get_io_handle ()) - oret = open (O_WRONLY | O_BINARY, 0); - res = 0; - break; - case GETACL: - if (!aclbufp) - set_errno (EFAULT); - else if (nentries < MIN_ACL_ENTRIES) - set_errno (ENOSPC); - else - { - if (!get_io_handle ()) - { - query_open (query_read_control); - if (!(oret = open (O_BINARY, 0))) - return -1; - } - if (!fstat_by_handle (&st)) - { - aclbufp[0].a_type = USER_OBJ; - aclbufp[0].a_id = st.st_uid; - aclbufp[0].a_perm = (st.st_mode & S_IRWXU) >> 6; - aclbufp[1].a_type = GROUP_OBJ; - aclbufp[1].a_id = st.st_gid; - aclbufp[1].a_perm = (st.st_mode & S_IRWXG) >> 3; - aclbufp[2].a_type = OTHER_OBJ; - aclbufp[2].a_id = ILLEGAL_GID; - aclbufp[2].a_perm = st.st_mode & S_IRWXO; - aclbufp[3].a_type = CLASS_OBJ; - aclbufp[3].a_id = ILLEGAL_GID; - aclbufp[3].a_perm = S_IRWXU | S_IRWXG | S_IRWXO; - res = MIN_ACL_ENTRIES; - } - } - break; - case GETACLCNT: - res = MIN_ACL_ENTRIES; - break; - default: - set_errno (EINVAL); - break; - } - } - else - { - if (!get_io_handle ()) - { - query_open (cmd == SETACL ? query_write_control : query_read_control); - if (!(oret = open (O_BINARY, 0))) - return -1; - } - switch (cmd) - { - case SETACL: - if (!aclsort32 (nentries, 0, aclbufp)) - res = setacl (get_io_handle (), pc, nentries, aclbufp); - break; - case GETACL: - if (!aclbufp) - set_errno(EFAULT); - else - res = getacl (get_io_handle (), pc, pc, nentries, aclbufp); - break; - case GETACLCNT: - res = getacl (get_io_handle (), pc, pc, 0, NULL); - break; - default: - set_errno (EINVAL); - break; - } - } - - if (oret) - close (); - - return res; -} - -int -fhandler_disk_file::fadvise (_off64_t offset, _off64_t length, int advice) -{ - if (advice < POSIX_FADV_NORMAL || advice > POSIX_FADV_NOREUSE) - { - set_errno (EINVAL); - return -1; - } - - if (!wincap.is_winnt ()) - return 0; - - /* Windows only supports advice flags for the whole file. We're using - a simplified test here so that we don't have to ask for the actual - file size. Length == 0 means all bytes starting at offset anyway. - So we only actually follow the advice, if it's given for offset == 0. */ - if (offset != 0) - return 0; - - /* We only support normal and sequential mode for now. Everything which - is not POSIX_FADV_SEQUENTIAL is treated like POSIX_FADV_NORMAL. */ - if (advice != POSIX_FADV_SEQUENTIAL) - advice = POSIX_FADV_NORMAL; - - IO_STATUS_BLOCK io; - FILE_MODE_INFORMATION fmi; - NTSTATUS status = NtQueryInformationFile (get_handle (), &io, - &fmi, sizeof fmi, - FileModeInformation); - if (!NT_SUCCESS (status)) - __seterrno_from_nt_status (status); - else - { - fmi.Mode &= ~FILE_SEQUENTIAL_ONLY; - if (advice == POSIX_FADV_SEQUENTIAL) - fmi.Mode |= FILE_SEQUENTIAL_ONLY; - status = NtSetInformationFile (get_handle (), &io, &fmi, sizeof fmi, - FileModeInformation); - if (NT_SUCCESS (status)) - return 0; - __seterrno_from_nt_status (status); - } - - return -1; -} - -int -fhandler_disk_file::ftruncate (_off64_t length, bool allow_truncate) -{ - int res = -1; - - if (length < 0 || !get_handle ()) - set_errno (EINVAL); - else if (pc.isdir ()) - set_errno (EISDIR); - else if (!(get_access () & GENERIC_WRITE)) - set_errno (EBADF); - else - { - _off64_t actual_length; - DWORD size_high = 0; - actual_length = GetFileSize (get_handle (), &size_high); - actual_length += ((_off64_t) size_high) << 32; - - /* If called through posix_fallocate, silently succeed if length - is less than the file's actual length. */ - if (!allow_truncate && length < actual_length) - return 0; - - if (wincap.is_winnt ()) - { - NTSTATUS status; - IO_STATUS_BLOCK io; - FILE_END_OF_FILE_INFORMATION feofi; - - feofi.EndOfFile.QuadPart = length; - /* Create sparse files only when called through ftruncate, not when - called through posix_fallocate. */ - if (allow_truncate - && get_fs_flags (FILE_SUPPORTS_SPARSE_FILES) - && length >= actual_length + (128 * 1024)) - { - DWORD dw; - BOOL r = DeviceIoControl (get_handle (), - FSCTL_SET_SPARSE, NULL, 0, NULL, - 0, &dw, NULL); - syscall_printf ("%d = DeviceIoControl(%p, FSCTL_SET_SPARSE)", - r, get_handle ()); - } - status = NtSetInformationFile (get_handle (), &io, - &feofi, sizeof feofi, - FileEndOfFileInformation); - if (!NT_SUCCESS (status)) - __seterrno_from_nt_status (status); - else - res = 0; - } - else - { - _off64_t prev_loc = lseek (0, SEEK_CUR); - if (lseek (length, SEEK_SET) >= 0) - { - int res_bug = write (&res, 0); - if (!SetEndOfFile (get_handle ())) - __seterrno (); - else - res = res_bug; - /* restore original file pointer location */ - lseek (prev_loc, SEEK_SET); - } - - } - } - return res; -} - -int -fhandler_disk_file::link (const char *newpath) -{ - extern bool allow_winsymlinks; - extern suffix_info stat_suffixes[]; - - path_conv newpc (newpath, PC_SYM_NOFOLLOW | PC_POSIX, - transparent_exe ? stat_suffixes : NULL); - if (newpc.error) - { - set_errno (newpc.case_clash ? ECASECLASH : newpc.error); - return -1; - } - - if (newpc.exists ()) - { - syscall_printf ("file '%s' exists?", (char *) newpc); - set_errno (EEXIST); - return -1; - } - - if (newpc[strlen (newpc) - 1] == '.') - { - syscall_printf ("trailing dot, bailing out"); - set_errno (EINVAL); - return -1; - } - - char new_buf[CYG_MAX_PATH + 5]; - if (!newpc.error && !newpc.case_clash) - { - DWORD bintype; - int len; - - if (allow_winsymlinks && pc.is_lnk_special ()) - { - /* Shortcut hack. */ - strcpy (new_buf, newpath); - strcat (new_buf, ".lnk"); - newpath = new_buf; - newpc.check (newpath, PC_SYM_NOFOLLOW); - } - else if (transparent_exe - && !pc.isdir () - && GetBinaryType (pc, &bintype) - && (len = strlen (newpc)) > 4 - && !strcasematch ((const char *) newpc + len - 4, ".exe")) - { - /* Executable hack. */ - strcpy (new_buf, newpath); - strcat (new_buf, ".exe"); - newpath = new_buf; - newpc.check (newpath, PC_SYM_NOFOLLOW); - } - } - - query_open (query_write_attributes); - if (!open (O_BINARY, 0)) - { - syscall_printf ("Opening file failed"); - __seterrno (); - return -1; - } - - /* Try to make hard link first on Windows NT */ - if (wincap.has_hard_links ()) - { - if (CreateHardLinkA (newpc, pc, NULL)) - goto success; - - /* There are two cases to consider: - - The FS doesn't support hard links ==> ERROR_INVALID_FUNCTION - We copy the file. - - CreateHardLinkA is not supported ==> ERROR_PROC_NOT_FOUND - In that case (<= NT4) we try the old-style method. - Any other error should be taken seriously. */ - if (GetLastError () == ERROR_INVALID_FUNCTION) - { - syscall_printf ("FS doesn't support hard links: Copy file"); - goto docopy; - } - if (GetLastError () != ERROR_PROC_NOT_FOUND) - { - syscall_printf ("CreateHardLinkA failed"); - __seterrno (); - close (); - return -1; - } - - WIN32_STREAM_ID stream_id; - LPVOID context; - WCHAR wbuf[CYG_MAX_PATH]; - BOOL ret; - DWORD written, write_err, path_len, size; - - path_len = sys_mbstowcs (wbuf, newpc, CYG_MAX_PATH) * sizeof (WCHAR); - - stream_id.dwStreamId = BACKUP_LINK; - stream_id.dwStreamAttributes = 0; - stream_id.dwStreamNameSize = 0; - stream_id.Size.HighPart = 0; - stream_id.Size.LowPart = path_len; - size = sizeof (WIN32_STREAM_ID) - sizeof (WCHAR**) - + stream_id.dwStreamNameSize; - context = NULL; - write_err = 0; - /* Write WIN32_STREAM_ID */ - ret = BackupWrite (get_handle (), (LPBYTE) &stream_id, size, - &written, FALSE, FALSE, &context); - if (ret) - { - /* write the buffer containing the path */ - /* FIXME: BackupWrite sometimes traps if linkname is invalid. - Need to handle. */ - ret = BackupWrite (get_handle (), (LPBYTE) wbuf, path_len, - &written, FALSE, FALSE, &context); - if (!ret) - { - write_err = GetLastError (); - syscall_printf ("cannot write linkname, %E"); - } - /* Free context */ - BackupWrite (get_handle (), NULL, 0, &written, - TRUE, FALSE, &context); - } - else - { - write_err = GetLastError (); - syscall_printf ("cannot write stream_id, %E"); - } - - if (!ret) - { - /* Only copy file if FS doesn't support hard links */ - if (write_err == ERROR_INVALID_FUNCTION) - { - syscall_printf ("FS doesn't support hard links: Copy file"); - goto docopy; - } - - close (); - __seterrno_from_win_error (write_err); - return -1; - } - - success: - close (); - if (!allow_winsymlinks && pc.is_lnk_special ()) - SetFileAttributes (newpc, (DWORD) pc - | FILE_ATTRIBUTE_SYSTEM - | FILE_ATTRIBUTE_READONLY); - return 0; - } -docopy: - /* do this with a copy */ - if (!CopyFileA (pc, newpc, 1)) - { - __seterrno (); - return -1; - } - /* Set ctime on success (copy gets it automatically). */ - if (!wincap.is_winnt ()) - has_changed (true); - close (); - fhandler_disk_file fh (newpc); - fh.query_open (query_write_attributes); - if (fh.open (O_BINARY, 0)) - fh.close (); - return 0; -} - -int -fhandler_disk_file::utimes (const struct timeval *tvp) -{ - return utimes_fs (tvp); -} - -int -fhandler_base::utimes_fs (const struct timeval *tvp) -{ - FILETIME lastaccess, lastwrite; - struct timeval tmp[2]; - bool closeit; - - if (get_handle ()) - closeit = false; - else - { - query_open (query_write_attributes); - if (!open_fs (O_BINARY, 0)) - { - /* It's documented in MSDN that FILE_WRITE_ATTRIBUTES is sufficient - to change the timestamps. Unfortunately it's not sufficient for a - remote HPFS which requires GENERIC_WRITE, so we just retry to open - for writing, though this fails for R/O files of course. */ - query_open (no_query); - if (!open_fs (O_WRONLY | O_BINARY, 0)) - { - syscall_printf ("Opening file failed"); - return -1; - } - } - closeit = true; - } - - if (nohandle ()) /* Directory query_open on 9x. */ - return 0; - - gettimeofday (&tmp[0], 0); - if (!tvp) - { - tmp[1] = tmp[0]; - tvp = tmp; - } - timeval_to_filetime (&tvp[0], &lastaccess); - timeval_to_filetime (&tvp[1], &lastwrite); - debug_printf ("incoming lastaccess %08x %08x", tvp[0].tv_sec, tvp[0].tv_usec); - - if (is_fs_special ()) - SetFileAttributes (pc, (DWORD) pc & ~FILE_ATTRIBUTE_READONLY); - BOOL res = SetFileTime (get_handle (), NULL, &lastaccess, &lastwrite); - DWORD errcode = GetLastError (); - if (is_fs_special ()) - SetFileAttributes (pc, pc); - /* Opening a directory on a 9x share from a NT machine works(!), but - then the SetFileTimes fails with ERROR_NOT_SUPPORTED. Oh well... */ - if (!res && errcode != ERROR_NOT_SUPPORTED) - { - close (); - __seterrno_from_win_error (errcode); - return -1; - } - - if (closeit) - close (); - return 0; -} - -fhandler_disk_file::fhandler_disk_file () : - fhandler_base () -{ -} - -fhandler_disk_file::fhandler_disk_file (path_conv &pc) : - fhandler_base () -{ - set_name (pc); -} - -int -fhandler_disk_file::open (int flags, mode_t mode) -{ - return open_fs (flags, mode); -} - -int -fhandler_base::open_fs (int flags, mode_t mode) -{ - if (pc.case_clash && flags & O_CREAT) - { - debug_printf ("case clash detected"); - set_errno (ECASECLASH); - return 0; - } - - /* Unfortunately NT allows to open directories for writing, but that's - disallowed according to SUSv3. */ - if (pc.isdir () && (flags & O_ACCMODE) != O_RDONLY) - { - set_errno (EISDIR); - return 0; - } - - int res = fhandler_base::open (flags | O_DIROPEN, mode); - if (!res) - goto out; - - /* This is for file systems known for having a buggy CreateFile call - which might return a valid HANDLE without having actually opened - the file. - The only known file system to date is the SUN NFS Solstice Client 3.1 - which returns a valid handle when trying to open a file in a nonexistent - directory. */ - if (pc.has_buggy_open () && !pc.exists ()) - { - debug_printf ("Buggy open detected."); - close_fs (); - set_errno (ENOENT); - return 0; - } - - /* Attributes may be set only if a file is _really_ created. - This code is now only used for ntea here since the files - security attributes are set in CreateFile () now. */ - if (flags & O_CREAT - && GetLastError () != ERROR_ALREADY_EXISTS - && !allow_ntsec && allow_ntea) - set_file_attribute (false, NULL, get_win32_name (), mode); - - set_fs_flags (pc.fs_flags ()); - -out: - syscall_printf ("%d = fhandler_disk_file::open (%s, %p)", res, - get_win32_name (), flags); - return res; -} - -int -fhandler_disk_file::close () -{ - if (!hExeced) - { - /* Changing inode data requires setting ctime (only 9x). */ - if (has_changed ()) - touch_ctime (); - } - return close_fs (); -} - -int -fhandler_base::close_fs () -{ - int res = fhandler_base::close (); - if (!res) - user_shared->delqueue.process_queue (); - return res; -} - -ssize_t __stdcall -fhandler_disk_file::pread (void *buf, size_t count, _off64_t offset) -{ - ssize_t res; - _off64_t curpos = lseek (0, SEEK_CUR); - if (curpos < 0 || lseek (offset, SEEK_SET) < 0) - res = -1; - else - { - size_t tmp_count = count; - read (buf, tmp_count); - if (lseek (curpos, SEEK_SET) >= 0) - res = (ssize_t) tmp_count; - else - res = -1; - } - debug_printf ("%d = pread (%p, %d, %d)\n", res, buf, count, offset); - return res; -} - -ssize_t __stdcall -fhandler_disk_file::pwrite (void *buf, size_t count, _off64_t offset) -{ - int res; - _off64_t curpos = lseek (0, SEEK_CUR); - if (curpos < 0 || lseek (offset, SEEK_SET) < 0) - res = curpos; - else - { - res = (ssize_t) write (buf, count); - if (lseek (curpos, SEEK_SET) < 0) - res = -1; - } - debug_printf ("%d = pwrite (%p, %d, %d)\n", res, buf, count, offset); - return res; -} - -/* FIXME: The correct way to do this to get POSIX locking semantics is to - keep a linked list of posix lock requests and map them into Win32 locks. - he problem is that Win32 does not deal correctly with overlapping lock - requests. Also another pain is that Win95 doesn't do non-blocking or - non-exclusive locks at all. For '95 just convert all lock requests into - blocking,exclusive locks. This shouldn't break many apps but denying all - locking would. For now just convert to Win32 locks and hope for - the best. */ - -int -fhandler_disk_file::lock (int cmd, struct __flock64 *fl) -{ - _off64_t win32_start; - _off64_t win32_len; - _off64_t startpos; - - /* - * We don't do getlck calls yet. - */ - - if (cmd == F_GETLK) - { - set_errno (ENOSYS); - return -1; - } - - /* - * Calculate where in the file to start from, - * then adjust this by fl->l_start. - */ - - switch (fl->l_whence) - { - case SEEK_SET: - startpos = 0; - break; - case SEEK_CUR: - if ((startpos = lseek (0, SEEK_CUR)) == ILLEGAL_SEEK) - return -1; - break; - case SEEK_END: - { - BY_HANDLE_FILE_INFORMATION finfo; - if (GetFileInformationByHandle (get_handle (), &finfo) == 0) - { - __seterrno (); - return -1; - } - startpos = ((_off64_t)finfo.nFileSizeHigh << 32) - + finfo.nFileSizeLow; - break; - } - default: - set_errno (EINVAL); - return -1; - } - - /* - * Now the fun starts. Adjust the start and length - * fields until they make sense. - */ - - win32_start = startpos + fl->l_start; - if (fl->l_len < 0) - { - win32_start -= fl->l_len; - win32_len = -fl->l_len; - } - else - win32_len = fl->l_len; - - if (win32_start < 0) - { - /* watch the signs! */ - win32_len -= -win32_start; - if (win32_len <= 0) - { - /* Failure ! */ - set_errno (EINVAL); - return -1; - } - win32_start = 0; - } - - DWORD off_high, off_low, len_high, len_low; - - off_low = (DWORD)(win32_start & UINT32_MAX); - off_high = (DWORD)(win32_start >> 32); - if (win32_len == 0) - { - /* Special case if len == 0 for POSIX means lock to the end of - the entire file (and all future extensions). */ - /* CV, 2003-12-03: And yet another Win 9x bugginess. For some reason - offset + length must be <= 0x100000000. I'm using 0xffffffff as - upper border here, this should be sufficient. */ - len_low = UINT32_MAX - (wincap.lock_file_highword () ? 0 : off_low); - len_high = wincap.lock_file_highword (); - } - else - { - len_low = (DWORD)(win32_len & UINT32_MAX); - len_high = (DWORD)(win32_len >> 32); - } - - BOOL res; - - if (wincap.has_lock_file_ex ()) - { - DWORD lock_flags = (cmd == F_SETLK) ? LOCKFILE_FAIL_IMMEDIATELY : 0; - lock_flags |= (fl->l_type == F_WRLCK) ? LOCKFILE_EXCLUSIVE_LOCK : 0; - - OVERLAPPED ov; - - ov.Internal = 0; - ov.InternalHigh = 0; - ov.Offset = off_low; - ov.OffsetHigh = off_high; - ov.hEvent = (HANDLE) 0; - - if (fl->l_type == F_UNLCK) - { - res = UnlockFileEx (get_handle (), 0, len_low, len_high, &ov); - if (res == 0 && GetLastError () == ERROR_NOT_LOCKED) - res = 1; - } - else - { - res = LockFileEx (get_handle (), lock_flags, 0, - len_low, len_high, &ov); - /* Deal with the fail immediately case. */ - /* - * FIXME !! I think this is the right error to check for - * but I must admit I haven't checked.... - */ - if ((res == 0) && (lock_flags & LOCKFILE_FAIL_IMMEDIATELY) && - (GetLastError () == ERROR_LOCK_FAILED)) - { - set_errno (EAGAIN); - return -1; - } - } - } - else - { - /* Windows 95 -- use primitive lock call */ - if (fl->l_type == F_UNLCK) - res = UnlockFile (get_handle (), off_low, off_high, len_low, len_high); - else - res = LockFile (get_handle (), off_low, off_high, len_low, len_high); - } - - if (res == 0) - { - __seterrno (); - return -1; - } - - return 0; -} - -int -fhandler_disk_file::mkdir (mode_t mode) -{ - int res = -1; - SECURITY_ATTRIBUTES sa = sec_none_nih; - security_descriptor sd; - - if (allow_ntsec && has_acls ()) - set_security_attribute (S_IFDIR | ((mode & 07777) & ~cygheap->umask), - &sa, sd); - - if (CreateDirectoryA (get_win32_name (), &sa)) - { - if (!allow_ntsec && allow_ntea) - set_file_attribute (false, NULL, get_win32_name (), - S_IFDIR | ((mode & 07777) & ~cygheap->umask)); -#ifdef HIDDEN_DOT_FILES - char *c = strrchr (real_dir.get_win32 (), '\\'); - if ((c && c[1] == '.') || *get_win32_name () == '.') - SetFileAttributes (get_win32_name (), FILE_ATTRIBUTE_HIDDEN); -#endif - res = 0; - } - else - __seterrno (); - - return res; -} - -int -fhandler_disk_file::rmdir () -{ - int res = -1; - - /* Even own directories can't be removed if R/O attribute is set. */ - if (pc.has_attribute (FILE_ATTRIBUTE_READONLY)) - SetFileAttributes (get_win32_name (), - (DWORD) pc & ~FILE_ATTRIBUTE_READONLY); - - DWORD err, att = 0; - int rc = RemoveDirectory (get_win32_name ()); - - if (isremote () && exists ()) - att = GetFileAttributes (get_win32_name ()); - - /* Sometimes smb indicates failure when it really succeeds, so check for - this case specifically. */ - if (rc || att == INVALID_FILE_ATTRIBUTES) - { - /* RemoveDirectory on a samba drive doesn't return an error if the - directory can't be removed because it's not empty. Checking for - existence afterwards keeps us informed about success. */ - if (!isremote () || att == INVALID_FILE_ATTRIBUTES) - return 0; - - err = ERROR_DIR_NOT_EMPTY; - } - else - err = GetLastError (); - /* On 9X ERROR_ACCESS_DENIED is returned if you try to remove a - non-empty directory. */ - if (err == ERROR_ACCESS_DENIED - && wincap.access_denied_on_delete ()) - err = ERROR_DIR_NOT_EMPTY; - /* ...and, that's *not* funny, when trying to remove a non-existing - directory on a share, which is hosted by a 9x machine, the error - code ERROR_INVALID_FUNCTION is returned. */ - else if (err == ERROR_INVALID_FUNCTION) - err = ERROR_FILE_NOT_FOUND; - - __seterrno_from_win_error (err); - - /* Directory still exists, restore its characteristics. */ - if (pc.has_attribute (FILE_ATTRIBUTE_READONLY)) - SetFileAttributes (get_win32_name (), (DWORD) pc); - - return res; -} - -/* This is the minimal number of entries which fit into the readdir cache. - The number of bytes allocated by the cache is determined by this number, - To tune caching, just tweak this number. To get a feeling for the size, - the size of the readdir cache is DIR_NUM_ENTRIES * 632 + 264 bytes. */ - -#define DIR_NUM_ENTRIES 100 /* Cache size 63464 bytes */ - -#define DIR_BUF_SIZE (DIR_NUM_ENTRIES \ - * (sizeof (FILE_ID_BOTH_DIR_INFORMATION) \ - + 2 * CYG_MAX_PATH)) - -struct __DIR_cache -{ - char __name[CYG_MAX_PATH]; - ULONG __pos; - char __cache[DIR_BUF_SIZE]; -}; - -#define d_dirname(d) (((__DIR_cache *) (d)->__d_dirname)->__name) -#define d_cachepos(d) (((__DIR_cache *) (d)->__d_dirname)->__pos) -#define d_cache(d) (((__DIR_cache *) (d)->__d_dirname)->__cache) - -#define d_mounts(d) ((__DIR_mounts *) (d)->__d_internal) - -DIR * -fhandler_disk_file::opendir () -{ - DIR *dir; - DIR *res = NULL; - size_t len; - - if (!pc.isdir ()) - set_errno (ENOTDIR); - else if ((len = strlen (pc)) > CYG_MAX_PATH - 3) - set_errno (ENAMETOOLONG); - else if ((dir = (DIR *) malloc (sizeof (DIR))) == NULL) - set_errno (ENOMEM); - else if ((dir->__d_dirname = (char *) malloc (wincap.is_winnt () - ? sizeof (struct __DIR_cache) - : len + 3)) == NULL) - { - set_errno (ENOMEM); - goto free_dir; - } - else if ((dir->__d_dirent = - (struct dirent *) malloc (sizeof (struct dirent))) == NULL) - { - set_errno (ENOMEM); - goto free_dirname; - } - else - { - strcpy (d_dirname (dir), get_win32_name ()); - dir->__d_dirent->__d_version = __DIRENT_VERSION; - cygheap_fdnew fd; - - if (fd < 0) - goto free_dirent; - - /* FindFirstFile doesn't seem to like duplicate /'s. - The dirname is generated with trailing backslash here which - simplifies later usage of dirname for checking symlinks. - Appending a "*" is moved right before calling FindFirstFile. - Since FindFirstFile is only called once, this should even be a - teeny little bit faster. */ - len = strlen (d_dirname (dir)); - if (len && !isdirsep (d_dirname (dir)[len - 1])) - strcpy (d_dirname (dir) + len, "\\"); - dir->__d_cookie = __DIRENT_COOKIE; - dir->__handle = INVALID_HANDLE_VALUE; - dir->__d_position = 0; - - dir->__flags = (pc.normalized_path[0] == '/' - && pc.normalized_path[1] == '\0') - ? dirent_isroot : 0; - dir->__d_internal = (unsigned) new __DIR_mounts (pc.normalized_path); - if (wincap.is_winnt ()) - { - d_cachepos (dir) = 0; - if (!pc.iscygdrive ()) - { - OBJECT_ATTRIBUTES attr; - WCHAR wpath[CYG_MAX_PATH + 10]; - UNICODE_STRING upath = {0, sizeof (wpath), wpath}; - IO_STATUS_BLOCK io; - NTSTATUS status; - SECURITY_ATTRIBUTES sa = sec_none; - pc.get_nt_native_path (upath); - InitializeObjectAttributes (&attr, &upath, - OBJ_CASE_INSENSITIVE | OBJ_INHERIT, - NULL, sa.lpSecurityDescriptor); - status = NtOpenFile (&dir->__handle, - SYNCHRONIZE | FILE_LIST_DIRECTORY, - &attr, &io, wincap.shared (), - FILE_SYNCHRONOUS_IO_NONALERT - | FILE_OPEN_FOR_BACKUP_INTENT - | FILE_DIRECTORY_FILE); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto free_mounts; - } - - /* FileIdBothDirectoryInformation is apparently unsupported on - XP when accessing directories on UDF. When trying to use it - so, NtQueryDirectoryFile returns with STATUS_ACCESS_VIOLATION. - It's not clear if the call isn't also unsupported on other - OS/FS combinations (say, Win2K/CDFS or so). Instead of - testing in readdir for yet another error code, let's use - FileIdBothDirectoryInformation only on filesystems supporting - persistent ACLs, FileBothDirectoryInformation otherwise. */ - if (pc.hasgood_inode ()) - { - dir->__flags |= dirent_set_d_ino; - if (wincap.has_fileid_dirinfo ()) - dir->__flags |= dirent_get_d_ino; - } - } - } - /* Filling fd with `this' (aka storing this in the file descriptor table - should only happen after it's clear that opendir doesn't fail, - otherwise we end up cfree'ing the fhandler twice, once in opendir() - in dir.cc, the second time on exit. Nasty, nasty... */ - fd = this; - fd->nohandle (true); - dir->__d_fd = fd; - dir->__fh = this; - res = dir; - } - - syscall_printf ("%p = opendir (%s)", res, get_name ()); - return res; - -free_mounts: - delete d_mounts (dir); -free_dirent: - free (dir->__d_dirent); -free_dirname: - free (dir->__d_dirname); -free_dir: - free (dir); - return res; -} - -int -fhandler_disk_file::readdir_helper (DIR *dir, dirent *de, DWORD w32_err, - DWORD attr, char *fname) -{ - if (w32_err) - { - bool added = false; - if ((de->d_ino = d_mounts (dir)->check_missing_mount (fname))) - added = true; - if (!added) - return geterrno_from_win_error (w32_err); - - attr = 0; - dir->__flags &= ~dirent_set_d_ino; - } - - /* Check for Windows shortcut. If it's a Cygwin or U/WIN - symlink, drop the .lnk suffix. */ - if (attr & FILE_ATTRIBUTE_READONLY) - { - char *c = fname; - char *e = strchr (fname, '\0') - 4; - if (e > c && strcasematch (e, ".lnk")) - { - char fbuf[CYG_MAX_PATH]; - strcpy (fbuf, d_dirname (dir)); - strcat (fbuf, c); - path_conv fpath (fbuf, PC_SYM_NOFOLLOW); - if (fpath.issymlink () || fpath.is_fs_special ()) - *e = '\0'; - } - } - - if (pc.isencoded ()) - fnunmunge (de->d_name, fname); - else - strcpy (de->d_name, fname); - if (dir->__d_position == 0 && !strcmp (fname, ".")) - dir->__flags |= dirent_saw_dot; - else if (dir->__d_position == 1 && !strcmp (fname, "..")) - dir->__flags |= dirent_saw_dot_dot; - return 0; -} - -static inline __ino64_t -readdir_get_ino_by_handle (HANDLE hdl) -{ - IO_STATUS_BLOCK io; - FILE_INTERNAL_INFORMATION pfai; - - if (!NtQueryInformationFile (hdl, &io, &pfai, sizeof pfai, - FileInternalInformation)) - return pfai.FileId.QuadPart; - return 0; -} - -__ino64_t __stdcall -readdir_get_ino (DIR *dir, const char *path, bool dot_dot) -{ - char fname[CYG_MAX_PATH]; - struct __stat64 st; - HANDLE hdl; - __ino64_t ino = 0; - - if (!(dir->__flags & dirent_isroot)) - { - strcpy (fname, path); - if (dot_dot) - strcat (fname, (*fname && fname[strlen (fname) - 1] == '/') - ? ".." : "/.."); - path_conv pc (fname, PC_SYM_NOFOLLOW); - if (pc.isspecial ()) - { - if (!lstat64 (fname, &st)) - ino = st.st_ino; - } - else if (!pc.hasgood_inode ()) - ino = hash_path_name (0, pc); - else if ((hdl = CreateFile (pc, GENERIC_READ, wincap.shared (), NULL, - OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, - NULL)) != INVALID_HANDLE_VALUE) - { - ino = readdir_get_ino_by_handle (hdl); - CloseHandle (hdl); - } - } - else - ino = readdir_get_ino_by_handle (dir->__handle); - return ino; -} - -int -fhandler_disk_file::readdir (DIR *dir, dirent *de) -{ - int res = 0; - NTSTATUS status = STATUS_SUCCESS; - PFILE_ID_BOTH_DIR_INFORMATION buf = NULL; - wchar_t *FileName; - char fname[CYG_MAX_PATH]; - IO_STATUS_BLOCK io; - - if (!wincap.is_winnt ()) - return readdir_9x (dir, de); - - /* d_cachepos always refers to the next cache entry to use. If it's 0 - we must reload the cache. */ - if (d_cachepos (dir) == 0) - { - if ((dir->__flags & dirent_get_d_ino)) - { - status = NtQueryDirectoryFile (dir->__handle, NULL, NULL, 0, &io, - d_cache (dir), DIR_BUF_SIZE, - FileIdBothDirectoryInformation, - FALSE, NULL, dir->__d_position == 0); - /* FileIdBothDirectoryInformation isn't supported for remote drives - on NT4 and 2K systems, and it's also not supported on 2K at all, - when accessing network drives on any remote OS. We just fall - back to using a standard directory query in this case and note - this case using the dirent_get_d_ino flag. */ - if (status == STATUS_INVALID_LEVEL - || status == STATUS_INVALID_PARAMETER - || status == STATUS_INVALID_INFO_CLASS) - dir->__flags &= ~dirent_get_d_ino; - /* Something weird happens on Samba up to version 3.0.21c, which is - fixed in 3.0.22. FileIdBothDirectoryInformation seems to work - nicely, but only up to the 128th entry in the directory. After - reaching this entry, the next call to NtQueryDirectoryFile - (FileIdBothDirectoryInformation) returns STATUS_INVALID_LEVEL. - Why should we care, we can just switch to - FileBothDirectoryInformation, isn't it? Nope! The next call to - NtQueryDirectoryFile(FileBothDirectoryInformation) actually - returns STATUS_NO_MORE_FILES, regardless how many files are left - unread in the directory. This does not happen when using - FileBothDirectoryInformation right from the start, but since - we can't decide whether the server we're talking with has this - bug or not, we end up serving Samba shares always in the slow - mode using FileBothDirectoryInformation. So, what we do here is - to implement the solution suggested by Andrew Tridgell, we just - reread all entries up to dir->d_position using - FileBothDirectoryInformation. - However, We do *not* mark this server as broken and fall back to - using FileBothDirectoryInformation further on. This would slow - down every access to such a server, even for directories under - 128 entries. Also, bigger dirs only suffer from one additional - call per full directory scan, which shouldn't be too big a hit. - This can easily be changed if necessary. */ - if (status == STATUS_INVALID_LEVEL && dir->__d_position) - { - d_cachepos (dir) = 0; - for (int cnt = 0; cnt < dir->__d_position; ++cnt) - { - if (d_cachepos (dir) == 0) - { - status = NtQueryDirectoryFile (dir->__handle, NULL, NULL, - 0, &io, d_cache (dir), DIR_BUF_SIZE, - FileBothDirectoryInformation, - FALSE, NULL, cnt == 0); - if (!NT_SUCCESS (status)) - goto go_ahead; - } - buf = (PFILE_ID_BOTH_DIR_INFORMATION) (d_cache (dir) - + d_cachepos (dir)); - if (buf->NextEntryOffset == 0) - d_cachepos (dir) = 0; - else - d_cachepos (dir) += buf->NextEntryOffset; - } - goto go_ahead; - } - } - if (!(dir->__flags & dirent_get_d_ino)) - status = NtQueryDirectoryFile (dir->__handle, NULL, NULL, 0, &io, - d_cache (dir), DIR_BUF_SIZE, - FileBothDirectoryInformation, - FALSE, NULL, dir->__d_position == 0); - } - -go_ahead: - - if (NT_SUCCESS (status)) - { - buf = (PFILE_ID_BOTH_DIR_INFORMATION) (d_cache (dir) + d_cachepos (dir)); - if (buf->NextEntryOffset == 0) - d_cachepos (dir) = 0; - else - d_cachepos (dir) += buf->NextEntryOffset; - if ((dir->__flags & dirent_get_d_ino)) - { - FileName = buf->FileName; - if ((dir->__flags & dirent_set_d_ino)) - de->d_ino = buf->FileId.QuadPart; - } - else - FileName = ((PFILE_BOTH_DIR_INFORMATION) buf)->FileName; - sys_wcstombs (fname, CYG_MAX_PATH - 1, FileName, buf->FileNameLength / 2); - - de->d_ino = d_mounts (dir)->check_mount (fname, de->d_ino); - if (de->d_ino == 0 && (dir->__flags & dirent_set_d_ino)) - { - OBJECT_ATTRIBUTES attr; - - if (dir->__d_position == 0 && buf->FileNameLength == 2 - && FileName[0] == '.') - de->d_ino = readdir_get_ino_by_handle (dir->__handle); - else if (dir->__d_position == 1 && buf->FileNameLength == 4 - && FileName[0] == '.' && FileName[1] == '.') - de->d_ino = readdir_get_ino (dir, pc.normalized_path, true); - else - { - HANDLE hdl; - UNICODE_STRING upath = {buf->FileNameLength, CYG_MAX_PATH * 2, - FileName}; - InitializeObjectAttributes (&attr, &upath, OBJ_CASE_INSENSITIVE, - dir->__handle , NULL); - if (!NtOpenFile (&hdl, READ_CONTROL, &attr, &io, - wincap.shared (), FILE_OPEN_FOR_BACKUP_INTENT)) - { - de->d_ino = readdir_get_ino_by_handle (hdl); - CloseHandle (hdl); - } - } - /* Enforce namehash as inode number on untrusted file systems. */ - if (!pc.isgood_inode (de->d_ino)) - { - dir->__flags &= ~dirent_set_d_ino; - de->d_ino = 0; - } - } - } - - if (!(res = readdir_helper (dir, de, RtlNtStatusToDosError (status), - buf ? buf->FileAttributes : 0, fname))) - dir->__d_position++; - else if (!(dir->__flags & dirent_saw_dot)) - { - strcpy (de->d_name , "."); - de->d_ino = readdir_get_ino_by_handle (dir->__handle); - dir->__d_position++; - dir->__flags |= dirent_saw_dot; - res = 0; - } - else if (!(dir->__flags & dirent_saw_dot_dot)) - { - strcpy (de->d_name , ".."); - de->d_ino = readdir_get_ino (dir, pc.normalized_path, true); - dir->__d_position++; - dir->__flags |= dirent_saw_dot_dot; - res = 0; - } - - syscall_printf ("%d = readdir (%p, %p) (%s)", res, dir, &de, res ? "***" : de->d_name); - return res; -} - -int -fhandler_disk_file::readdir_9x (DIR *dir, dirent *de) -{ - WIN32_FIND_DATA buf; - int res = 0; - - if (!dir->__handle) - { - res = ENMFILE; - goto out; - } - DWORD lasterr; - if (dir->__d_position != 0) - lasterr = FindNextFileA (dir->__handle, &buf) ? 0 : GetLastError (); - else if (dir->__handle != INVALID_HANDLE_VALUE) - { - res = EBADF; - goto out; - } - else - { - int len = strlen (dir->__d_dirname); - strcpy (dir->__d_dirname + len, "*"); - dir->__handle = FindFirstFile (dir->__d_dirname, &buf); - dir->__d_dirname[len] = '\0'; - if (dir->__handle != INVALID_HANDLE_VALUE) - lasterr = 0; - else if ((lasterr = GetLastError ()) != ERROR_NO_MORE_FILES) - { - res = geterrno_from_win_error (lasterr); - goto out; - } - } - if (!lasterr) - de->d_ino = d_mounts (dir)->check_mount (buf.cFileName, de->d_ino); - if (!(res = readdir_helper (dir, de, lasterr, buf.dwFileAttributes, - buf.cFileName))) - dir->__d_position++; - else - { - FindClose (dir->__handle); - dir->__handle = NULL; - } - -out: - syscall_printf ("%d = readdir (%p, %p) (%s)", res, dir, &de, res ? "***" : de->d_name); - return res; -} - -_off64_t -fhandler_disk_file::telldir (DIR *dir) -{ - return dir->__d_position; -} - -void -fhandler_disk_file::seekdir (DIR *dir, _off64_t loc) -{ - rewinddir (dir); - while (loc > dir->__d_position) - if (!::readdir (dir)) - break; -} - -void -fhandler_disk_file::rewinddir (DIR *dir) -{ - if (wincap.is_winnt ()) - { - d_cachepos (dir) = 0; - if (wincap.has_buggy_restart_scan () && isremote ()) - { - /* This works around a W2K bug. The RestartScan parameter in calls - to NtQueryDirectoryFile on remote shares is ignored, thus - resulting in not being able to rewind on remote shares. By - reopening the directory, we get a fresh new directory pointer. */ - UNICODE_STRING fname = {0, CYG_MAX_PATH * 2, (WCHAR *) L""}; - OBJECT_ATTRIBUTES attr; - NTSTATUS status; - IO_STATUS_BLOCK io; - HANDLE new_dir; - - InitializeObjectAttributes (&attr, &fname, OBJ_CASE_INSENSITIVE, - dir->__handle, NULL); - status = NtOpenFile (&new_dir, SYNCHRONIZE | FILE_LIST_DIRECTORY, - &attr, &io, wincap.shared (), - FILE_SYNCHRONOUS_IO_NONALERT - | FILE_OPEN_FOR_BACKUP_INTENT - | FILE_DIRECTORY_FILE); - if (!NT_SUCCESS (stat)) - debug_printf ("Unable to reopen dir %s, NT error: 0x%08x, " - "win32: %lu", get_name (), status, - RtlNtStatusToDosError (status)); - else - { - CloseHandle (dir->__handle); - dir->__handle = new_dir; - } - } - } - else if (dir->__handle != INVALID_HANDLE_VALUE) - { - if (dir->__handle) - FindClose (dir->__handle); - dir->__handle = INVALID_HANDLE_VALUE; - } - dir->__d_position = 0; - d_mounts (dir)->rewind (); -} - -int -fhandler_disk_file::closedir (DIR *dir) -{ - int res = 0; - delete d_mounts (dir); - if (!dir->__handle) - /* ignore */; - else if (dir->__handle == INVALID_HANDLE_VALUE) - { - set_errno (EBADF); - res = -1; - } - else - { - BOOL winres; - if (wincap.is_winnt ()) - winres = CloseHandle (dir->__handle); - else - winres = FindClose (dir->__handle); - if (!winres) - { - __seterrno (); - res = -1; - } - } - syscall_printf ("%d = closedir (%p)", res, dir); - return res; -} - -fhandler_cygdrive::fhandler_cygdrive () : - fhandler_disk_file (), ndrives (0), pdrive (NULL) -{ -} - -int -fhandler_cygdrive::open (int flags, mode_t mode) -{ - if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) - { - set_errno (EEXIST); - return 0; - } - if (flags & O_WRONLY) - { - set_errno (EISDIR); - return 0; - } - flags |= O_DIROPEN; - set_flags (flags); - nohandle (true); - return 1; -} - -int -fhandler_cygdrive::close () -{ - return 0; -} - -#define DRVSZ sizeof ("x:\\") -void -fhandler_cygdrive::set_drives () -{ - const int len = 2 + 26 * DRVSZ; - char *p = const_cast<char *> (get_win32_name ()); - pdrive = p; - ndrives = GetLogicalDriveStrings (len, p) / DRVSZ; -} - -int -fhandler_cygdrive::fstat (struct __stat64 *buf) -{ - buf->st_mode = S_IFDIR | 0555; - buf->st_ino = 2; - buf->st_nlink = 1; - return 0; -} - -DIR * -fhandler_cygdrive::opendir () -{ - DIR *dir; - - dir = fhandler_disk_file::opendir (); - if (dir && !ndrives) - set_drives (); - - return dir; -} - -int -fhandler_cygdrive::readdir (DIR *dir, dirent *de) -{ - while (true) - { - if (!pdrive || !*pdrive) - { - if (!(dir->__flags & dirent_saw_dot)) - { - de->d_name[0] = '.'; - de->d_name[1] = '\0'; - de->d_ino = 2; - } - return ENMFILE; - } - if (GetFileAttributes (pdrive) != INVALID_FILE_ATTRIBUTES) - break; - pdrive = strchr (pdrive, '\0') + 1; - } - *de->d_name = cyg_tolower (*pdrive); - de->d_name[1] = '\0'; - de->d_ino = readdir_get_ino (dir, pdrive, false); - dir->__d_position++; - pdrive = strchr (pdrive, '\0') + 1; - syscall_printf ("%p = readdir (%p) (%s)", &de, dir, de->d_name); - return 0; -} - -void -fhandler_cygdrive::rewinddir (DIR *dir) -{ - pdrive = get_win32_name (); - dir->__d_position = 0; -} - -int -fhandler_cygdrive::closedir (DIR *dir) -{ - pdrive = get_win32_name (); - return 0; -} |