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authorcvs2svn <>2010-12-18 01:10:07 +0300
committercvs2svn <>2010-12-18 01:10:07 +0300
commit27ab486f12c627f6780cb59815f0a36fe69d1497 (patch)
tree1d25fbce04b6a00d7b7d8f8fd64fa4209b57f42f /winsup/cygwin/fhandler_disk_file.cc
parentafeb58b9ae7d03780fd695beeb64203994252c71 (diff)
This commit was manufactured by cvs2svn to create tag 'newlib-1_19_0'.newlib-1_19_0
Sprout from master 2010-12-17 22:10:05 UTC Jeff Johnston <jjohnstn@redhat.com> '' Cherrypick from cygnus 1999-05-03 07:29:06 UTC Richard Henderson <rth@redhat.com> '19990502 sourceware import': README config/mt-d30v config/mt-netware config/mt-ospace etc/add-log.el etc/add-log.vi etc/configbuild.ein etc/configbuild.fig etc/configbuild.jin etc/configbuild.tin etc/configdev.ein etc/configdev.fig etc/configdev.jin etc/configdev.tin makefile.vms Delete: djunpack.bat include/COPYING include/COPYING3 include/ChangeLog include/ChangeLog-9103 include/MAINTAINERS include/alloca-conf.h include/ansidecl.h include/aout/ChangeLog include/aout/adobe.h include/aout/aout64.h include/aout/ar.h include/aout/dynix3.h include/aout/encap.h include/aout/host.h include/aout/hp.h include/aout/hp300hpux.h include/aout/hppa.h include/aout/ranlib.h include/aout/reloc.h include/aout/stab.def include/aout/stab_gnu.h include/aout/sun4.h include/bfdlink.h include/binary-io.h include/bout.h include/cgen/ChangeLog include/cgen/basic-modes.h include/cgen/basic-ops.h include/cgen/bitset.h include/coff/ChangeLog include/coff/ChangeLog-9103 include/coff/alpha.h include/coff/apollo.h include/coff/arm.h include/coff/aux-coff.h include/coff/ecoff.h include/coff/external.h include/coff/go32exe.h include/coff/h8300.h include/coff/h8500.h include/coff/i386.h include/coff/i860.h include/coff/i960.h include/coff/ia64.h include/coff/internal.h include/coff/m68k.h include/coff/m88k.h include/coff/mcore.h include/coff/mips.h include/coff/mipspe.h include/coff/or32.h include/coff/pe.h include/coff/powerpc.h include/coff/rs6000.h include/coff/rs6k64.h include/coff/sh.h include/coff/sparc.h include/coff/sym.h include/coff/symconst.h include/coff/ti.h include/coff/tic30.h include/coff/tic4x.h include/coff/tic54x.h include/coff/tic80.h include/coff/w65.h include/coff/we32k.h include/coff/x86_64.h include/coff/xcoff.h include/coff/z80.h include/coff/z8k.h include/demangle.h include/dis-asm.h include/dwarf2.h 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winsup/w32api/lib/ddk/hal.def winsup/w32api/lib/ddk/hid.def winsup/w32api/lib/ddk/hidparse.def winsup/w32api/lib/ddk/mcd.def winsup/w32api/lib/ddk/ndis.def winsup/w32api/lib/ddk/newdev.def winsup/w32api/lib/ddk/ntoskrnl.def winsup/w32api/lib/ddk/scsiport.def winsup/w32api/lib/ddk/tdi.def winsup/w32api/lib/ddk/usbcamd.def winsup/w32api/lib/ddk/usbcamd2.def winsup/w32api/lib/ddk/videoprt.def winsup/w32api/lib/ddk/win32k.def winsup/w32api/lib/devguid.c winsup/w32api/lib/dhcpcsvc.def winsup/w32api/lib/directx/Makefile.in winsup/w32api/lib/directx/d3d8.def winsup/w32api/lib/directx/d3d9.def winsup/w32api/lib/directx/d3dim.def winsup/w32api/lib/directx/d3drm.def winsup/w32api/lib/directx/d3dx8d.def winsup/w32api/lib/directx/d3dx9d.def winsup/w32api/lib/directx/d3dxof.def winsup/w32api/lib/directx/ddraw.def winsup/w32api/lib/directx/dinput.def winsup/w32api/lib/directx/dinput8.def winsup/w32api/lib/directx/dinput_joy.c winsup/w32api/lib/directx/dinput_joy2.c winsup/w32api/lib/directx/dinput_kbd.c winsup/w32api/lib/directx/dinput_mouse.c winsup/w32api/lib/directx/dinput_mouse2.c winsup/w32api/lib/directx/dinput_private.h winsup/w32api/lib/directx/dmoguids.c winsup/w32api/lib/directx/dplayx.def winsup/w32api/lib/directx/dpnaddr.def winsup/w32api/lib/directx/dpnet.def winsup/w32api/lib/directx/dpnlobby.def winsup/w32api/lib/directx/dpvoice.def winsup/w32api/lib/directx/dsetup.def winsup/w32api/lib/directx/dsound.def winsup/w32api/lib/directx/dxerr.c winsup/w32api/lib/directx/dxerr8.c winsup/w32api/lib/directx/dxerr8w.c winsup/w32api/lib/directx/dxerr9.c winsup/w32api/lib/directx/dxerr9w.c winsup/w32api/lib/directx/dxguid.c winsup/w32api/lib/directx/ksproxy.def winsup/w32api/lib/directx/ksuser.c winsup/w32api/lib/directx/ksuser.def winsup/w32api/lib/directx/msdmo.def winsup/w32api/lib/directx/strmiids.c winsup/w32api/lib/directx/test.c winsup/w32api/lib/dlcapi.def winsup/w32api/lib/dnsapi.def winsup/w32api/lib/docobj-uuid.c winsup/w32api/lib/exdisp-uuid.c winsup/w32api/lib/extras-uuid.c winsup/w32api/lib/faultrep.def winsup/w32api/lib/gdi32.def winsup/w32api/lib/gdiplus.c winsup/w32api/lib/gdiplus.def winsup/w32api/lib/glaux.def winsup/w32api/lib/glu32.def winsup/w32api/lib/hlguids-uuid.c winsup/w32api/lib/hlink-uuid.c winsup/w32api/lib/icmui.def winsup/w32api/lib/igmpagnt.def winsup/w32api/lib/imagehlp.def winsup/w32api/lib/imm32.def winsup/w32api/lib/iphlpapi.def winsup/w32api/lib/kernel32.def winsup/w32api/lib/largeint.c winsup/w32api/lib/lz32.def winsup/w32api/lib/mapi32.def winsup/w32api/lib/mfcuia32.def winsup/w32api/lib/mgmtapi.def winsup/w32api/lib/mlang-uuid.c winsup/w32api/lib/mpr.def winsup/w32api/lib/mprapi.def winsup/w32api/lib/mqrt.def winsup/w32api/lib/msacm32.def winsup/w32api/lib/mscms.def winsup/w32api/lib/mshtml-uuid.c winsup/w32api/lib/msimg32.def winsup/w32api/lib/msvcp60.def winsup/w32api/lib/msvfw32.def winsup/w32api/lib/mswsock.def winsup/w32api/lib/msxml-uuid.c winsup/w32api/lib/nddeapi.def winsup/w32api/lib/netapi32.def winsup/w32api/lib/ntdll.def winsup/w32api/lib/oaidl-uuid.c winsup/w32api/lib/objidl-uuid.c winsup/w32api/lib/objsafe-uuid.c winsup/w32api/lib/ocidl-uuid.c winsup/w32api/lib/odbc32.def winsup/w32api/lib/odbccp32.def winsup/w32api/lib/ole32.def winsup/w32api/lib/oleacc-uuid.c winsup/w32api/lib/oleacc.def winsup/w32api/lib/oleaut32.def winsup/w32api/lib/olecli32.def winsup/w32api/lib/olectlid-uuid.c winsup/w32api/lib/oledlg.def winsup/w32api/lib/oleidl-uuid.c winsup/w32api/lib/olepro32.def winsup/w32api/lib/olesvr32.def winsup/w32api/lib/opengl32.def winsup/w32api/lib/penwin32.def winsup/w32api/lib/pkpd32.def winsup/w32api/lib/power-uuid.c winsup/w32api/lib/powrprof.def winsup/w32api/lib/psapi.def winsup/w32api/lib/quartz.def winsup/w32api/lib/rapi.def winsup/w32api/lib/rasapi32.def winsup/w32api/lib/rasdlg.def winsup/w32api/lib/res.rc winsup/w32api/lib/rpcdce4.def winsup/w32api/lib/rpcns4.def winsup/w32api/lib/rpcrt4.def winsup/w32api/lib/rtm.def winsup/w32api/lib/rtutils.def winsup/w32api/lib/scrnsave.c winsup/w32api/lib/secur32.def winsup/w32api/lib/servprov-uuid.c winsup/w32api/lib/setupapi.def winsup/w32api/lib/shell32.c winsup/w32api/lib/shell32.def winsup/w32api/lib/shfolder.def winsup/w32api/lib/shlwapi.def winsup/w32api/lib/snmpapi.def winsup/w32api/lib/svrapi.def winsup/w32api/lib/tapi32.def winsup/w32api/lib/test.c winsup/w32api/lib/thunk32.def winsup/w32api/lib/unknwn-uuid.c winsup/w32api/lib/url.def winsup/w32api/lib/urlmon-uuid.c winsup/w32api/lib/user32.def winsup/w32api/lib/userenv.def winsup/w32api/lib/usp10.def winsup/w32api/lib/uxtheme.def winsup/w32api/lib/vdmdbg.def winsup/w32api/lib/version.def winsup/w32api/lib/vfw32.mri winsup/w32api/lib/win32spl.def winsup/w32api/lib/wininet.def winsup/w32api/lib/winmm.def winsup/w32api/lib/winspool.def winsup/w32api/lib/winstrm.def winsup/w32api/lib/wldap32.def winsup/w32api/lib/wow32.def winsup/w32api/lib/ws2_32.c winsup/w32api/lib/ws2_32.def winsup/w32api/lib/wsnmp32.def winsup/w32api/lib/wsock32.def winsup/w32api/lib/wst.def winsup/w32api/lib/wtsapi32.def
Diffstat (limited to 'winsup/cygwin/fhandler_disk_file.cc')
-rw-r--r--winsup/cygwin/fhandler_disk_file.cc2286
1 files changed, 0 insertions, 2286 deletions
diff --git a/winsup/cygwin/fhandler_disk_file.cc b/winsup/cygwin/fhandler_disk_file.cc
deleted file mode 100644
index aea62a1b2..000000000
--- a/winsup/cygwin/fhandler_disk_file.cc
+++ /dev/null
@@ -1,2286 +0,0 @@
-/* fhandler_disk_file.cc
-
- Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
- 2005, 2006, 2007, 2008, 2009, 2010 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 <stdlib.h>
-#include <sys/acl.h>
-#include <sys/statvfs.h>
-#include "cygerrno.h"
-#include "security.h"
-#include "path.h"
-#include "fhandler.h"
-#include "dtable.h"
-#include "cygheap.h"
-#include "shared_info.h"
-#include "pinfo.h"
-#include "ntdll.h"
-#include "tls_pbuf.h"
-#include "pwdgrp.h"
-#include <winioctl.h>
-
-#define _COMPILING_NEWLIB
-#include <dirent.h>
-
-class __DIR_mounts
-{
- int count;
- const char *parent_dir;
- int parent_dir_len;
- UNICODE_STRING mounts[MAX_MOUNTS];
- bool found[MAX_MOUNTS + 2];
- UNICODE_STRING cygdrive;
-
-#define __DIR_PROC (MAX_MOUNTS)
-#define __DIR_CYGDRIVE (MAX_MOUNTS+1)
-
- __ino64_t eval_ino (int idx)
- {
- __ino64_t ino = 0;
- char fname[parent_dir_len + mounts[idx].Length + 2];
- struct __stat64 st;
-
- char *c = stpcpy (fname, parent_dir);
- if (c[- 1] != '/')
- *c++ = '/';
- sys_wcstombs (c, mounts[idx].Length + 1,
- mounts[idx].Buffer, mounts[idx].Length / sizeof (WCHAR));
- path_conv pc (fname, PC_SYM_NOFOLLOW | PC_POSIX);
- if (!stat_worker (pc, &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,
- &cygdrive);
- rewind ();
- }
- ~__DIR_mounts ()
- {
- for (int i = 0; i < count; ++i)
- RtlFreeUnicodeString (&mounts[i]);
- RtlFreeUnicodeString (&cygdrive);
- }
- __ino64_t check_mount (PUNICODE_STRING fname, __ino64_t ino,
- bool eval = true)
- {
- if (parent_dir_len == 1) /* root dir */
- {
- if (RtlEqualUnicodeString (fname, &ro_u_proc, FALSE))
- {
- found[__DIR_PROC] = true;
- return 2;
- }
- if (fname->Length / sizeof (WCHAR) == mount_table->cygdrive_len - 2
- && RtlEqualUnicodeString (fname, &cygdrive, FALSE))
- {
- found[__DIR_CYGDRIVE] = true;
- return 2;
- }
- }
- for (int i = 0; i < count; ++i)
- if (RtlEqualUnicodeString (fname, &mounts[i], FALSE))
- {
- found[i] = true;
- return eval ? eval_ino (i) : 1;
- }
- return ino;
- }
- __ino64_t check_missing_mount (PUNICODE_STRING retname = NULL)
- {
- for (int i = 0; i < count; ++i)
- if (!found[i])
- {
- found[i] = true;
- if (retname)
- {
- *retname = mounts[i];
- return eval_ino (i);
- }
- return 1;
- }
- if (parent_dir_len == 1) /* root dir */
- {
- if (!found[__DIR_PROC])
- {
- found[__DIR_PROC] = true;
- if (retname)
- *retname = ro_u_proc;
- return 2;
- }
- if (!found[__DIR_CYGDRIVE])
- {
- found[__DIR_CYGDRIVE] = true;
- if (cygdrive.Length > 0)
- {
- if (retname)
- *retname = cygdrive;
- return 2;
- }
- }
- }
- return 0;
- }
- void rewind () { memset (found, 0, sizeof found); }
-};
-
-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 ());
-}
-
-/* Check reparse point for type. IO_REPARSE_TAG_MOUNT_POINT types are
- either volume mount points, which are treated as directories, or they
- are directory mount points, which are treated as symlinks.
- IO_REPARSE_TAG_SYMLINK types are always symlinks. We don't know
- anything about other reparse points, so they are treated as unknown. */
-static inline int
-readdir_check_reparse_point (POBJECT_ATTRIBUTES attr)
-{
- DWORD ret = DT_UNKNOWN;
- IO_STATUS_BLOCK io;
- HANDLE reph;
- UNICODE_STRING subst;
-
- if (NT_SUCCESS (NtOpenFile (&reph, READ_CONTROL, attr, &io,
- FILE_SHARE_VALID_FLAGS,
- FILE_OPEN_FOR_BACKUP_INTENT
- | FILE_OPEN_REPARSE_POINT)))
- {
- PREPARSE_DATA_BUFFER rp = (PREPARSE_DATA_BUFFER)
- alloca (MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
- if (NT_SUCCESS (NtFsControlFile (reph, NULL, NULL, NULL,
- &io, FSCTL_GET_REPARSE_POINT, NULL, 0,
- (LPVOID) rp, MAXIMUM_REPARSE_DATA_BUFFER_SIZE)))
- {
- if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT)
- {
- RtlInitCountedUnicodeString (&subst,
- (WCHAR *)((char *)rp->MountPointReparseBuffer.PathBuffer
- + rp->MountPointReparseBuffer.SubstituteNameOffset),
- rp->MountPointReparseBuffer.SubstituteNameLength);
- /* Only volume mountpoints are treated as directories. */
- if (RtlEqualUnicodePathPrefix (&subst, &ro_u_volume, TRUE))
- ret = DT_DIR;
- else
- ret = DT_LNK;
- }
- else if (rp->ReparseTag == IO_REPARSE_TAG_SYMLINK)
- ret = DT_LNK;
- NtClose (reph);
- }
- }
- return ret;
-}
-
-inline __ino64_t
-path_conv::get_ino_by_handle (HANDLE hdl)
-{
- IO_STATUS_BLOCK io;
- FILE_INTERNAL_INFORMATION fai;
-
- if (NT_SUCCESS (NtQueryInformationFile (hdl, &io, &fai, sizeof fai,
- FileInternalInformation))
- && isgood_inode (fai.FileId.QuadPart))
- return fai.FileId.QuadPart;
- return 0;
-}
-
-#if 0
-/* This function is obsolete. We're keeping it in so we don't forget
- that we already did all that at one point. */
-unsigned __stdcall
-path_conv::ndisk_links (DWORD nNumberOfLinks)
-{
- if (!isdir () || isremote ())
- return nNumberOfLinks;
-
- OBJECT_ATTRIBUTES attr;
- IO_STATUS_BLOCK io;
- HANDLE fh;
-
- if (!NT_SUCCESS (NtOpenFile (&fh, SYNCHRONIZE | FILE_LIST_DIRECTORY,
- get_object_attr (attr, sec_none_nih),
- &io, FILE_SHARE_VALID_FLAGS,
- FILE_SYNCHRONOUS_IO_NONALERT
- | FILE_OPEN_FOR_BACKUP_INTENT
- | FILE_DIRECTORY_FILE)))
- return nNumberOfLinks;
-
- unsigned count = 0;
- bool first = true;
- PFILE_BOTH_DIRECTORY_INFORMATION fdibuf = (PFILE_BOTH_DIRECTORY_INFORMATION)
- alloca (65536);
- __DIR_mounts *dir = new __DIR_mounts (normalized_path);
- while (NT_SUCCESS (NtQueryDirectoryFile (fh, NULL, NULL, NULL, &io, fdibuf,
- 65536, FileBothDirectoryInformation,
- FALSE, NULL, first)))
- {
- if (first)
- {
- first = false;
- /* All directories have . and .. as their first entries.
- If . is not present as first entry, we're on a drive's
- root direcotry, which doesn't have these entries. */
- if (fdibuf->FileNameLength != 2 || fdibuf->FileName[0] != L'.')
- count = 2;
- }
- for (PFILE_BOTH_DIRECTORY_INFORMATION pfdi = fdibuf;
- pfdi;
- pfdi = (PFILE_BOTH_DIRECTORY_INFORMATION)
- (pfdi->NextEntryOffset ? (PBYTE) pfdi + pfdi->NextEntryOffset
- : NULL))
- {
- switch (pfdi->FileAttributes
- & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT))
- {
- case FILE_ATTRIBUTE_DIRECTORY:
- /* Just a directory */
- ++count;
- break;
- case FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT:
- /* Volume mount point or symlink to directory */
- {
- UNICODE_STRING fname;
-
- RtlInitCountedUnicodeString (&fname, pfdi->FileName,
- pfdi->FileNameLength);
- InitializeObjectAttributes (&attr, &fname,
- objcaseinsensitive (), fh, NULL);
- if (is_volume_mountpoint (&attr))
- ++count;
- }
- break;
- default:
- break;
- }
- UNICODE_STRING fname;
- RtlInitCountedUnicodeString (&fname, pfdi->FileName,
- pfdi->FileNameLength);
- dir->check_mount (&fname, 0, false);
- }
- }
- while (dir->check_missing_mount ())
- ++count;
- NtClose (fh);
- delete dir;
- return count;
-}
-#endif
-
-/* For files on NFS shares, we request an EA of type NfsV3Attributes.
- This returns the content of a struct fattr3 as defined in RFC 1813.
- The content is the NFS equivalent of struct stat. so there's not much
- to do here except for copying. */
-int __stdcall
-fhandler_base::fstat_by_nfs_ea (struct __stat64 *buf)
-{
- fattr3 *nfs_attr = pc.nfsattr ();
-
- if (get_io_handle ())
- {
- /* NFS stumbles over its own caching. If you write to the file,
- a subsequent fstat does not return the actual size of the file,
- but the size at the time the handle has been opened. Unless
- access through another handle invalidates the caching within the
- NFS client. */
- if (get_access () & GENERIC_WRITE)
- FlushFileBuffers (get_io_handle ());
- nfs_fetch_fattr3 (get_io_handle (), nfs_attr);
- }
- buf->st_dev = nfs_attr->fsid;
- buf->st_ino = nfs_attr->fileid;
- buf->st_mode = (nfs_attr->mode & 0xfff)
- | nfs_type_mapping[nfs_attr->type & 7];
- buf->st_nlink = nfs_attr->nlink;
- /* FIXME: How to convert UNIX uid/gid to Windows SIDs? */
-#if 0
- buf->st_uid = nfs_attr->uid;
- buf->st_gid = nfs_attr->gid;
-#else
- buf->st_uid = myself->uid;
- buf->st_gid = myself->gid;
-#endif
- buf->st_rdev = makedev (nfs_attr->rdev.specdata1,
- nfs_attr->rdev.specdata2);
- buf->st_size = nfs_attr->size;
- buf->st_blksize = PREFERRED_IO_BLKSIZE;
- buf->st_blocks = nfs_attr->used / 512;
- buf->st_atim = nfs_attr->atime;
- buf->st_mtim = nfs_attr->mtime;
- buf->st_ctim = nfs_attr->ctime;
- return 0;
-}
-
-int __stdcall
-fhandler_base::fstat_by_handle (struct __stat64 *buf)
-{
- /* Don't use FileAllInformation info class. It returns a pathname rather
- than a filename, so it needs a really big buffer for no good reason
- since we don't need the name anyway. So we just call the three info
- classes necessary to get all information required by stat(2). */
- FILE_STANDARD_INFORMATION fsi;
- FILE_INTERNAL_INFORMATION fii;
-
- HANDLE h = get_stat_handle ();
- NTSTATUS status = 0;
- IO_STATUS_BLOCK io;
-
- /* If the file has been opened for other purposes than stat, we can't rely
- on the information stored in pc.fnoi. So we overwrite them here. */
- if (get_io_handle ())
- {
- PFILE_NETWORK_OPEN_INFORMATION pfnoi = pc.fnoi ();
- status = NtQueryInformationFile (h, &io, pfnoi, sizeof *pfnoi,
- FileNetworkOpenInformation);
- if (!NT_SUCCESS (status))
- {
- debug_printf ("%p = NtQueryInformationFile(%S, "
- "FileNetworkOpenInformation)",
- status, pc.get_nt_native_path ());
- return -1;
- }
- }
- if (!pc.hasgood_inode ())
- fsi.NumberOfLinks = 1;
- else
- {
- status = NtQueryInformationFile (h, &io, &fsi, sizeof fsi,
- FileStandardInformation);
- if (!NT_SUCCESS (status))
- {
- debug_printf ("%p = NtQueryInformationFile(%S, "
- "FileStandardInformation)",
- status, pc.get_nt_native_path ());
- return -1;
- }
- if (!ino)
- {
- status = NtQueryInformationFile (h, &io, &fii, sizeof fii,
- FileInternalInformation);
- if (!NT_SUCCESS (status))
- {
- debug_printf ("%p = NtQueryInformationFile(%S, "
- "FileInternalInformation)",
- status, pc.get_nt_native_path ());
- return -1;
- }
- ino = fii.FileId.QuadPart;
- }
- }
- return fstat_helper (buf, fsi.NumberOfLinks);
-}
-
-int __stdcall
-fhandler_base::fstat_by_name (struct __stat64 *buf)
-{
- NTSTATUS status;
- OBJECT_ATTRIBUTES attr;
- IO_STATUS_BLOCK io;
- UNICODE_STRING dirname;
- UNICODE_STRING basename;
- HANDLE dir;
- struct {
- FILE_ID_BOTH_DIR_INFORMATION fdi;
- WCHAR buf[NAME_MAX + 1];
- } fdi_buf;
-
- if (!ino && pc.hasgood_inode ()
- && wincap.has_fileid_dirinfo () && !pc.has_buggy_fileid_dirinfo ())
- {
- RtlSplitUnicodePath (pc.get_nt_native_path (), &dirname, &basename);
- InitializeObjectAttributes (&attr, &dirname, pc.objcaseinsensitive (),
- NULL, NULL);
- status = NtOpenFile (&dir, SYNCHRONIZE | FILE_LIST_DIRECTORY,
- &attr, &io, FILE_SHARE_VALID_FLAGS,
- FILE_SYNCHRONOUS_IO_NONALERT
- | FILE_OPEN_FOR_BACKUP_INTENT
- | FILE_DIRECTORY_FILE);
- if (!NT_SUCCESS (status))
- debug_printf ("%p = NtOpenFile(%S)", status,
- pc.get_nt_native_path ());
- else
- {
- status = NtQueryDirectoryFile (dir, NULL, NULL, NULL, &io,
- &fdi_buf.fdi, sizeof fdi_buf,
- FileIdBothDirectoryInformation,
- TRUE, &basename, TRUE);
- NtClose (dir);
- if (!NT_SUCCESS (status))
- debug_printf ("%p = NtQueryDirectoryFile(%S)", status,
- pc.get_nt_native_path ());
- else
- ino = fdi_buf.fdi.FileId.QuadPart;
- }
- }
- return fstat_helper (buf, 1);
-}
-
-int __stdcall
-fhandler_base::fstat_fs (struct __stat64 *buf)
-{
- int res = -1;
- int oret;
- int open_flags = O_RDONLY | O_BINARY;
-
- if (get_stat_handle ())
- {
- if (!nohandle () && !is_fs_special ())
- res = pc.fs_is_nfs () ? fstat_by_nfs_ea (buf) : fstat_by_handle (buf);
- if (res)
- res = fstat_by_name (buf);
- return res;
- }
- /* First try to open with generic read access. This allows to read the file
- in fstat_helper (when checking for executability) without having to
- re-open it. Opening a file can take a lot of time on network drives
- so we try to avoid that. */
- oret = open_fs (open_flags, 0);
- if (!oret)
- {
- query_open (query_read_attributes);
- 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 and restore
- the state afterwards. */
- res = pc.fs_is_nfs () ? fstat_by_nfs_ea (buf) : fstat_by_handle (buf);
- bool no_handle = nohandle ();
- nohandle (false);
- close_fs ();
- nohandle (no_handle);
- set_io_handle (NULL);
- }
- if (res)
- res = fstat_by_name (buf);
-
- return res;
-}
-
-int __stdcall
-fhandler_base::fstat_helper (struct __stat64 *buf,
- DWORD nNumberOfLinks)
-{
- IO_STATUS_BLOCK st;
- FILE_COMPRESSION_INFORMATION fci;
- HANDLE h = get_stat_handle ();
- PFILE_NETWORK_OPEN_INFORMATION pfnoi = pc.fnoi ();
- ULONG attributes = pc.file_attributes ();
-
- to_timestruc_t ((PFILETIME) &pfnoi->LastAccessTime, &buf->st_atim);
- to_timestruc_t ((PFILETIME) &pfnoi->LastWriteTime, &buf->st_mtim);
- /* If the ChangeTime is 0, the underlying FS doesn't support this timestamp
- (FAT for instance). If so, it's faked using LastWriteTime. */
- to_timestruc_t (pfnoi->ChangeTime.QuadPart ? (PFILETIME) &pfnoi->ChangeTime
- : (PFILETIME) &pfnoi->LastWriteTime,
- &buf->st_ctim);
- to_timestruc_t ((PFILETIME) &pfnoi->CreationTime, &buf->st_birthtim);
- buf->st_rdev = buf->st_dev = get_dev ();
- buf->st_size = (_off64_t) pfnoi->EndOfFile.QuadPart;
- /* The number of links to a directory includes the number of subdirectories
- in the directory, since all those subdirectories point to it. However,
- this is painfully slow, so we do without it. */
-#if 0
- buf->st_nlink = pc.ndisk_links (nNumberOfLinks);
-#else
- buf->st_nlink = nNumberOfLinks;
-#endif
-
- /* Enforce namehash as inode number on untrusted file systems. */
- if (ino && pc.isgood_inode (ino))
- buf->st_ino = (__ino64_t) ino;
- else
- buf->st_ino = get_ino ();
-
- buf->st_blksize = PREFERRED_IO_BLKSIZE;
-
- if (pfnoi->AllocationSize.QuadPart >= 0LL)
- /* A successful NtQueryInformationFile returns the allocation size
- correctly for compressed and sparse files as well. */
- buf->st_blocks = (pfnoi->AllocationSize.QuadPart + S_BLKSIZE - 1)
- / S_BLKSIZE;
- else if (::has_attribute (attributes, FILE_ATTRIBUTE_COMPRESSED
- | FILE_ATTRIBUTE_SPARSE_FILE)
- && h && !is_fs_special ()
- && !NtQueryInformationFile (h, &st, (PVOID) &fci, sizeof fci,
- FileCompressionInformation))
- /* Otherwise we request the actual amount of bytes allocated for
- compressed and sparsed files. */
- buf->st_blocks = (fci.CompressedFileSize.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_attributes 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 (h, pc, NULL,
- &buf->st_uid, &buf->st_gid);
- goto done;
- }
- else if (pc.issocket ())
- buf->st_mode = S_IFSOCK;
-
- if (!get_file_attribute (is_fs_special () && !pc.issocket () ? NULL : h, pc,
- &buf->st_mode, &buf->st_uid, &buf->st_gid))
- {
- /* If read-only attribute is set, modify ntsec return value */
- if (::has_attribute (attributes, FILE_ATTRIBUTE_READONLY)
- && !pc.isdir () && !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 = buf->st_rdev = dev ();
- buf->st_mode = dev ().mode;
- buf->st_size = 0;
- }
- }
- else
- {
- buf->st_mode |= STD_RBITS;
-
- if (!::has_attribute (attributes, FILE_ATTRIBUTE_READONLY))
- buf->st_mode |= STD_WBITS;
- /* | S_IWGRP | S_IWOTH; we don't give write to group etc */
-
- if (pc.isdir ())
- buf->st_mode |= S_IFDIR | STD_WBITS | STD_XBITS;
- else if (buf->st_mode & S_IFMT)
- /* nothing */;
- else if (is_fs_special ())
- {
- buf->st_dev = buf->st_rdev = dev ();
- buf->st_mode = dev ().mode;
- buf->st_size = 0;
- }
- else
- {
- buf->st_mode |= S_IFREG;
- /* Check suffix for executable file. */
- if (pc.exec_state () != is_executable)
- {
- PUNICODE_STRING path = pc.get_nt_native_path ();
-
- if (RtlEqualUnicodePathSuffix (path, &ro_u_exe, TRUE)
- || RtlEqualUnicodePathSuffix (path, &ro_u_lnk, TRUE)
- || RtlEqualUnicodePathSuffix (path, &ro_u_com, TRUE))
- pc.set_exec ();
- }
- /* No known suffix, check file header. This catches binaries and
- shebang scripts. */
- if (pc.exec_state () == dont_know_if_executable)
- {
- OBJECT_ATTRIBUTES attr;
- NTSTATUS status = 0;
- IO_STATUS_BLOCK io;
-
- /* We have to re-open the file. Either the file is not opened
- for reading, or the read will change the file position of the
- original handle. */
- pc.init_reopen_attr (&attr, h);
- status = NtOpenFile (&h, SYNCHRONIZE | FILE_READ_DATA,
- &attr, &io, FILE_SHARE_VALID_FLAGS,
- FILE_OPEN_FOR_BACKUP_INTENT
- | FILE_SYNCHRONOUS_IO_NONALERT);
- if (!NT_SUCCESS (status))
- debug_printf ("%p = NtOpenFile(%S)", status,
- pc.get_nt_native_path ());
- else
- {
- LARGE_INTEGER off = { QuadPart:0LL };
- char magic[3];
-
- status = NtReadFile (h, NULL, NULL, NULL,
- &io, magic, 3, &off, NULL);
- if (!NT_SUCCESS (status))
- debug_printf ("%p = NtReadFile(%S)", status,
- pc.get_nt_native_path ());
- else if (has_exec_chars (magic, io.Information))
- {
- /* Heureka, it's an executable */
- pc.set_exec ();
- buf->st_mode |= STD_XBITS;
- }
- NtClose (h);
- }
- }
- }
- 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);
- /* If the FS supports ACLs, we're here because we couldn't even open
- the file for READ_CONTROL access. Chances are high that the file's
- security descriptor has no ACE for "Everyone", so we should not fake
- any access for "others". */
- if (has_acls ())
- buf->st_mode &= ~(S_IROTH | S_IWOTH | S_IXOTH);
- }
-
- done:
- syscall_printf ("0 = fstat (%S, %p) st_atime=%x st_size=%D, st_mode=%p, "
- "st_ino=%D, sizeof=%d",
- pc.get_nt_native_path (), 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)
-{
- return fstat_fs (buf);
-}
-
-int __stdcall
-fhandler_disk_file::fstatvfs (struct statvfs *sfs)
-{
- int ret = -1, opened = 0;
- NTSTATUS status;
- IO_STATUS_BLOCK io;
- FILE_FS_FULL_SIZE_INFORMATION full_fsi;
- FILE_FS_SIZE_INFORMATION fsi;
- /* We must not use the stat handle here, even if it exists. The handle
- has been opened with FILE_OPEN_REPARSE_POINT, thus, in case of a volume
- mount point, it points to the FS of the mount point, rather than to the
- mounted FS. */
- HANDLE fh = get_handle ();
-
- if (!fh)
- {
- OBJECT_ATTRIBUTES attr;
- opened = NT_SUCCESS (NtOpenFile (&fh, READ_CONTROL,
- pc.get_object_attr (attr, sec_none_nih),
- &io, FILE_SHARE_VALID_FLAGS,
- FILE_OPEN_FOR_BACKUP_INTENT));
- if (!opened)
- {
- /* Can't open file. Try again with parent dir. */
- UNICODE_STRING dirname;
- RtlSplitUnicodePath (pc.get_nt_native_path (), &dirname, NULL);
- attr.ObjectName = &dirname;
- opened = NT_SUCCESS (NtOpenFile (&fh, READ_CONTROL, &attr, &io,
- FILE_SHARE_VALID_FLAGS,
- FILE_OPEN_FOR_BACKUP_INTENT));
- if (!opened)
- goto out;
- }
- }
-
- sfs->f_files = ULONG_MAX;
- sfs->f_ffree = ULONG_MAX;
- sfs->f_favail = ULONG_MAX;
- sfs->f_fsid = pc.fs_serial_number ();
- sfs->f_flag = pc.fs_flags ();
- sfs->f_namemax = pc.fs_name_len ();
- /* Get allocation related information. Try to get "full" information
- first, which is only available since W2K. If that fails, try to
- retrieve normal allocation information. */
- status = NtQueryVolumeInformationFile (fh, &io, &full_fsi, sizeof full_fsi,
- FileFsFullSizeInformation);
- if (NT_SUCCESS (status))
- {
- sfs->f_bsize = full_fsi.BytesPerSector * full_fsi.SectorsPerAllocationUnit;
- sfs->f_frsize = sfs->f_bsize;
- sfs->f_blocks = full_fsi.TotalAllocationUnits.LowPart;
- sfs->f_bfree = full_fsi.ActualAvailableAllocationUnits.LowPart;
- sfs->f_bavail = full_fsi.CallerAvailableAllocationUnits.LowPart;
- if (sfs->f_bfree > sfs->f_bavail)
- {
- /* Quotas active. We can't trust TotalAllocationUnits. */
- NTFS_VOLUME_DATA_BUFFER nvdb;
-
- status = NtFsControlFile (fh, NULL, NULL, NULL, &io,
- FSCTL_GET_NTFS_VOLUME_DATA,
- NULL, 0, &nvdb, sizeof nvdb);
- if (!NT_SUCCESS (status))
- debug_printf ("%p = NtFsControlFile(%S, FSCTL_GET_NTFS_VOLUME_DATA)",
- status, pc.get_nt_native_path ());
- else
- sfs->f_blocks = nvdb.TotalClusters.QuadPart;
- }
- ret = 0;
- }
- else
- {
- status = NtQueryVolumeInformationFile (fh, &io, &fsi, sizeof fsi,
- FileFsSizeInformation);
- if (!NT_SUCCESS (status))
- {
- __seterrno_from_nt_status (status);
- goto out;
- }
- sfs->f_bsize = fsi.BytesPerSector * fsi.SectorsPerAllocationUnit;
- sfs->f_frsize = sfs->f_bsize;
- sfs->f_blocks = fsi.TotalAllocationUnits.LowPart;
- sfs->f_bfree = fsi.AvailableAllocationUnits.LowPart;
- sfs->f_bavail = sfs->f_bfree;
- ret = 0;
- }
-out:
- if (opened)
- NtClose (fh);
- syscall_printf ("%d = fstatvfs (%s, %p)", ret, get_name (), sfs);
- return ret;
-}
-
-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;
- NTSTATUS status;
- IO_STATUS_BLOCK io;
-
- if (pc.is_fs_special ())
- return chmod_device (pc, mode);
-
- if (!get_handle ())
- {
- query_open (query_write_dac);
- if (!(oret = open (O_BINARY, 0)))
- {
- /* Need WRITE_DAC|WRITE_OWNER to write ACLs. */
- if (pc.has_acls ())
- return -1;
- /* Otherwise FILE_WRITE_ATTRIBUTES is sufficient. */
- query_open (query_write_attributes);
- if (!(oret = open (O_BINARY, 0)))
- return -1;
- }
- }
-
- if (pc.fs_is_nfs ())
- {
- /* chmod on NFS shares works by writing an EA of type NfsV3Attributes.
- Only type and mode have to be set. Apparently type isn't checked
- for consistency, so it's sufficent to set it to NF3REG all the time. */
- struct {
- FILE_FULL_EA_INFORMATION ffei;
- char buf[sizeof (NFS_V3_ATTR) + sizeof (fattr3)];
- } ffei_buf;
- ffei_buf.ffei.NextEntryOffset = 0;
- ffei_buf.ffei.Flags = 0;
- ffei_buf.ffei.EaNameLength = sizeof (NFS_V3_ATTR) - 1;
- ffei_buf.ffei.EaValueLength = sizeof (fattr3);
- strcpy (ffei_buf.ffei.EaName, NFS_V3_ATTR);
- fattr3 *nfs_attr = (fattr3 *) (ffei_buf.ffei.EaName
- + ffei_buf.ffei.EaNameLength + 1);
- memset (nfs_attr, 0, sizeof (fattr3));
- nfs_attr->type = NF3REG;
- nfs_attr->mode = mode;
- status = NtSetEaFile (get_handle (), &io,
- &ffei_buf.ffei, sizeof ffei_buf);
- if (!NT_SUCCESS (status))
- __seterrno_from_nt_status (status);
- else
- res = 0;
- goto out;
- }
-
- if (pc.has_acls ())
- {
- if (pc.isdir ())
- mode |= S_IFDIR;
- if (!set_file_attribute (get_handle (), pc,
- ILLEGAL_UID, ILLEGAL_GID, mode))
- res = 0;
- }
-
- /* If the mode has any write bits set, the DOS R/O flag is in the way. */
- if (mode & (S_IWUSR | S_IWGRP | S_IWOTH))
- pc &= (DWORD) ~FILE_ATTRIBUTE_READONLY;
- else if (!pc.has_acls ()) /* Never set DOS R/O if security is used. */
- pc |= (DWORD) FILE_ATTRIBUTE_READONLY;
- if (S_ISSOCK (mode))
- pc |= (DWORD) FILE_ATTRIBUTE_SYSTEM;
-
- status = NtSetAttributesFile (get_handle (), pc.file_attributes ());
- /* MVFS needs a good amount of kicking to be convinced that it has to write
- back metadata changes and to invalidate the cached metadata information
- stored for the given handle. This method to open a second handle to
- the file and write the same metadata information twice has been found
- experimentally: http://cygwin.com/ml/cygwin/2009-07/msg00533.html */
- if (pc.fs_is_mvfs () && NT_SUCCESS (status) && !oret)
- {
- OBJECT_ATTRIBUTES attr;
- HANDLE fh;
-
- pc.init_reopen_attr (&attr, get_handle ());
- if (NT_SUCCESS (NtOpenFile (&fh, FILE_WRITE_ATTRIBUTES, &attr, &io,
- FILE_SHARE_VALID_FLAGS,
- FILE_OPEN_FOR_BACKUP_INTENT)))
- {
- NtSetAttributesFile (fh, pc.file_attributes ());
- NtClose (fh);
- }
- }
- /* Correct NTFS security attributes have higher priority */
- if (!pc.has_acls ())
- {
- if (!NT_SUCCESS (status))
- __seterrno_from_nt_status (status);
- else
- res = 0;
- }
-
-out:
- if (oret)
- close_fs ();
-
- return res;
-}
-
-int __stdcall
-fhandler_disk_file::fchown (__uid32_t uid, __gid32_t gid)
-{
- int oret = 0;
-
- if (!pc.has_acls ())
- {
- /* fake - if not supported, pretend we're like win95
- where it just works */
- /* FIXME: Could be supported on NFS when user->uid mapping is in place. */
- return 0;
- }
-
- if (!get_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;
- __uid32_t old_uid;
- int res = get_file_attribute (get_handle (), pc, &attrib, &old_uid, NULL);
- 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 (get_handle (), pc, uid, gid, attrib);
- /* If you're running a Samba server which has no winbidd running, the
- uid<->SID mapping is disfunctional. Even trying to chown to your
- own account fails since the account used on the server is the UNIX
- account which gets used for the standard user mapping. This is a
- default mechanism which doesn't know your real Windows SID.
- There are two possible error codes in different Samba releases for
- this situation, one of them is unfortunately the not very significant
- STATUS_ACCESS_DENIED. Instead of relying on the error codes, we're
- using the below very simple heuristic. If set_file_attribute failed,
- and the original user account was either already unknown, or one of
- the standard UNIX accounts, we're faking success. */
- if (res == -1 && pc.fs_is_samba ())
- {
- cygsid sid;
-
- if (old_uid == ILLEGAL_UID
- || (sid.getfrompw (internal_getpwuid (old_uid))
- && EqualPrefixSid (sid, well_known_samba_unix_user_fake_sid)))
- {
- debug_printf ("Faking chown worked on standalone Samba");
- res = 0;
- }
- }
- }
- if (oret)
- close_fs ();
-
- 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 ())
- {
-cant_access_acl:
- 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_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 (!fstat (&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 ((cmd == SETACL && !get_handle ())
- || (cmd != SETACL && !get_stat_handle ()))
- {
- query_open (cmd == SETACL ? query_write_control : query_read_control);
- if (!(oret = open (O_BINARY, 0)))
- {
- if (cmd == GETACL || cmd == GETACLCNT)
- goto cant_access_acl;
- return -1;
- }
- }
- switch (cmd)
- {
- case SETACL:
- if (!aclsort32 (nentries, 0, aclbufp))
- {
- bool rw = false;
- res = setacl (get_handle (), pc, nentries, aclbufp, rw);
- if (rw)
- {
- IO_STATUS_BLOCK io;
- FILE_BASIC_INFORMATION fbi;
- fbi.CreationTime.QuadPart
- = fbi.LastAccessTime.QuadPart
- = fbi.LastWriteTime.QuadPart
- = fbi.ChangeTime.QuadPart = 0LL;
- fbi.FileAttributes = (pc.file_attributes ()
- & ~FILE_ATTRIBUTE_READONLY)
- ?: FILE_ATTRIBUTE_NORMAL;
- NtSetInformationFile (get_handle (), &io, &fbi, sizeof fbi,
- FileBasicInformation);
- }
- }
- break;
- case GETACL:
- if (!aclbufp)
- set_errno(EFAULT);
- else
- res = getacl (get_stat_handle (), pc, nentries, aclbufp);
- /* For this ENOSYS case, see security.cc:get_file_attribute(). */
- if (res == -1 && get_errno () == ENOSYS)
- goto cant_access_acl;
- break;
- case GETACLCNT:
- res = getacl (get_stat_handle (), pc, 0, NULL);
- /* Ditto. */
- if (res == -1 && get_errno () == ENOSYS)
- goto cant_access_acl;
- break;
- default:
- set_errno (EINVAL);
- break;
- }
- }
-
- if (oret)
- close_fs ();
-
- return res;
-}
-
-ssize_t
-fhandler_disk_file::fgetxattr (const char *name, void *value, size_t size)
-{
- if (pc.is_fs_special ())
- {
- set_errno (ENOTSUP);
- return -1;
- }
- return read_ea (get_handle (), pc, name, (char *) value, size);
-}
-
-int
-fhandler_disk_file::fsetxattr (const char *name, const void *value, size_t size,
- int flags)
-{
- if (pc.is_fs_special ())
- {
- set_errno (ENOTSUP);
- return -1;
- }
- return write_ea (get_handle (), pc, name, (const char *) value, size, flags);
-}
-
-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;
- }
-
- /* 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
- {
- NTSTATUS status;
- IO_STATUS_BLOCK io;
- FILE_STANDARD_INFORMATION fsi;
- FILE_END_OF_FILE_INFORMATION feofi;
-
- status = NtQueryInformationFile (get_handle (), &io, &fsi, sizeof fsi,
- FileStandardInformation);
- if (!NT_SUCCESS (status))
- {
- __seterrno_from_nt_status (status);
- return -1;
- }
-
- /* If called through posix_fallocate, silently succeed if length
- is less than the file's actual length. */
- if (!allow_truncate && length < fsi.EndOfFile.QuadPart)
- return 0;
-
- feofi.EndOfFile.QuadPart = length;
- /* Create sparse files only when called through ftruncate, not when
- called through posix_fallocate. */
- if (allow_truncate
- && (pc.fs_flags () & FILE_SUPPORTS_SPARSE_FILES)
- && length >= fsi.EndOfFile.QuadPart + (128 * 1024))
- {
- status = NtFsControlFile (get_handle (), NULL, NULL, NULL, &io,
- FSCTL_SET_SPARSE, NULL, 0, NULL, 0);
- syscall_printf ("%p = NtFsControlFile(%S, FSCTL_SET_SPARSE)",
- status, pc.get_nt_native_path ());
- }
- status = NtSetInformationFile (get_handle (), &io,
- &feofi, sizeof feofi,
- FileEndOfFileInformation);
- if (!NT_SUCCESS (status))
- __seterrno_from_nt_status (status);
- else
- res = 0;
- }
- return res;
-}
-
-int
-fhandler_disk_file::link (const char *newpath)
-{
- size_t nlen = strlen (newpath);
- path_conv newpc (newpath, PC_SYM_NOFOLLOW | PC_POSIX | PC_NULLEMPTY, stat_suffixes);
- if (newpc.error)
- {
- set_errno (newpc.error);
- return -1;
- }
-
- if (newpc.exists ())
- {
- syscall_printf ("file '%S' exists?", newpc.get_nt_native_path ());
- set_errno (EEXIST);
- return -1;
- }
-
- if (isdirsep (newpath[nlen - 1]) || has_dot_last_component (newpath, false))
- {
- set_errno (ENOENT);
- return -1;
- }
-
- char new_buf[nlen + 5];
- if (!newpc.error)
- {
- /* If the original file is a lnk special file (except for sockets),
- and if the original file has a .lnk suffix, add one to the hardlink
- as well. */
- if (pc.is_lnk_special () && !pc.issocket ()
- && RtlEqualUnicodePathSuffix (pc.get_nt_native_path (),
- &ro_u_lnk, TRUE))
- {
- /* Shortcut hack. */
- stpcpy (stpcpy (new_buf, newpath), ".lnk");
- newpath = new_buf;
- newpc.check (newpath, PC_SYM_NOFOLLOW);
- }
- else if (!pc.isdir ()
- && pc.is_binary ()
- && RtlEqualUnicodePathSuffix (pc.get_nt_native_path (),
- &ro_u_exe, TRUE)
- && !RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (),
- &ro_u_exe, TRUE))
- {
- /* Executable hack. */
- stpcpy (stpcpy (new_buf, newpath), ".exe");
- newpath = new_buf;
- newpc.check (newpath, PC_SYM_NOFOLLOW);
- }
- }
-
- /* We only need READ_CONTROL access so the handle returned in pc is
- sufficient. And if the file couldn't be opened with READ_CONTROL
- access in path_conv, we won't be able to do it here anyway. */
- HANDLE fh = get_stat_handle ();
- if (!fh)
- {
- set_errno (EACCES);
- return -1;
- }
- PUNICODE_STRING tgt = newpc.get_nt_native_path ();
- ULONG size = sizeof (FILE_LINK_INFORMATION) + tgt->Length;
- PFILE_LINK_INFORMATION pfli = (PFILE_LINK_INFORMATION) alloca (size);
- pfli->ReplaceIfExists = FALSE;
- pfli->RootDirectory = NULL;
- memcpy (pfli->FileName, tgt->Buffer, pfli->FileNameLength = tgt->Length);
-
- NTSTATUS status;
- IO_STATUS_BLOCK io;
- status = NtSetInformationFile (fh, &io, pfli, size, FileLinkInformation);
- if (!NT_SUCCESS (status))
- {
- if (status == STATUS_INVALID_DEVICE_REQUEST)
- {
- /* FS doesn't support hard links. Linux returns EPERM. */
- set_errno (EPERM);
- return -1;
- }
- else
- {
- __seterrno_from_nt_status (status);
- return -1;
- }
- }
- return 0;
-}
-
-int
-fhandler_disk_file::utimens (const struct timespec *tvp)
-{
- return utimens_fs (tvp);
-}
-
-int
-fhandler_base::utimens_fs (const struct timespec *tvp)
-{
- struct timespec timeofday;
- struct timespec tmp[2];
- bool closeit = false;
-
- if (!get_handle ())
- {
- 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;
- }
-
- clock_gettime (CLOCK_REALTIME, &timeofday);
- if (!tvp)
- tmp[1] = tmp[0] = timeofday;
- else
- {
- if ((tvp[0].tv_nsec < UTIME_NOW || tvp[0].tv_nsec > 999999999L)
- || (tvp[1].tv_nsec < UTIME_NOW || tvp[1].tv_nsec > 999999999L))
- {
- if (closeit)
- close_fs ();
- set_errno (EINVAL);
- return -1;
- }
- tmp[0] = (tvp[0].tv_nsec == UTIME_NOW) ? timeofday : tvp[0];
- tmp[1] = (tvp[1].tv_nsec == UTIME_NOW) ? timeofday : tvp[1];
- }
- debug_printf ("incoming lastaccess %08x %08x", tmp[0].tv_sec, tmp[0].tv_nsec);
-
- IO_STATUS_BLOCK io;
- FILE_BASIC_INFORMATION fbi;
-
- fbi.CreationTime.QuadPart = 0LL;
- /* UTIME_OMIT is handled in timespec_to_filetime by setting FILETIME to 0. */
- timespec_to_filetime (&tmp[0], (LPFILETIME) &fbi.LastAccessTime);
- timespec_to_filetime (&tmp[1], (LPFILETIME) &fbi.LastWriteTime);
- fbi.ChangeTime.QuadPart = 0LL;
- fbi.FileAttributes = 0;
- NTSTATUS status = NtSetInformationFile (get_handle (), &io, &fbi, sizeof fbi,
- FileBasicInformation);
- /* For this special case for MVFS see the comment in
- fhandler_disk_file::fchmod. */
- if (pc.fs_is_mvfs () && NT_SUCCESS (status) && !closeit)
- {
- OBJECT_ATTRIBUTES attr;
- HANDLE fh;
-
- pc.init_reopen_attr (&attr, get_handle ());
- if (NT_SUCCESS (NtOpenFile (&fh, FILE_WRITE_ATTRIBUTES, &attr, &io,
- FILE_SHARE_VALID_FLAGS,
- FILE_OPEN_FOR_BACKUP_INTENT)))
- {
- NtSetInformationFile (fh, &io, &fbi, sizeof fbi,
- FileBasicInformation);
- NtClose (fh);
- }
- }
- if (closeit)
- close_fs ();
- /* Opening a directory on a 9x share from a NT machine works(!), but
- then NtSetInformationFile fails with STATUS_NOT_SUPPORTED. Oh well... */
- if (!NT_SUCCESS (status) && status != STATUS_NOT_SUPPORTED)
- {
- __seterrno_from_nt_status (status);
- return -1;
- }
- 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)
-{
- /* 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;
- }
-
- ino = pc.get_ino_by_handle (get_handle ());
- /* A unique ID is necessary to recognize fhandler entries which are
- duplicated by dup(2) or fork(2). */
- AllocateLocallyUniqueId ((PLUID) &unique_id);
-
-out:
- syscall_printf ("%d = fhandler_disk_file::open (%S, %p)", res,
- pc.get_nt_native_path (), flags);
- 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;
-}
-
-int
-fhandler_disk_file::mkdir (mode_t mode)
-{
- int res = -1;
- SECURITY_ATTRIBUTES sa = sec_none_nih;
- NTSTATUS status;
- HANDLE dir;
- OBJECT_ATTRIBUTES attr;
- IO_STATUS_BLOCK io;
- PFILE_FULL_EA_INFORMATION p = NULL;
- ULONG plen = 0;
-
- if (pc.fs_is_nfs ())
- {
- /* When creating a dir on an NFS share, we have to set the
- file mode by writing a NFS fattr3 structure with the
- correct mode bits set. */
- plen = sizeof (FILE_FULL_EA_INFORMATION) + sizeof (NFS_V3_ATTR)
- + sizeof (fattr3);
- p = (PFILE_FULL_EA_INFORMATION) alloca (plen);
- p->NextEntryOffset = 0;
- p->Flags = 0;
- p->EaNameLength = sizeof (NFS_V3_ATTR) - 1;
- p->EaValueLength = sizeof (fattr3);
- strcpy (p->EaName, NFS_V3_ATTR);
- fattr3 *nfs_attr = (fattr3 *) (p->EaName + p->EaNameLength + 1);
- memset (nfs_attr, 0, sizeof (fattr3));
- nfs_attr->type = NF3DIR;
- nfs_attr->mode = (mode & 07777) & ~cygheap->umask;
- }
- status = NtCreateFile (&dir, FILE_LIST_DIRECTORY | SYNCHRONIZE,
- pc.get_object_attr (attr, sa), &io, NULL,
- FILE_ATTRIBUTE_DIRECTORY, FILE_SHARE_VALID_FLAGS,
- FILE_CREATE,
- FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT
- | FILE_OPEN_FOR_BACKUP_INTENT,
- p, plen);
- if (NT_SUCCESS (status))
- {
- if (has_acls ())
- set_file_attribute (dir, pc, ILLEGAL_UID, ILLEGAL_GID,
- S_JUSTCREATED | S_IFDIR
- | ((mode & 07777) & ~cygheap->umask));
- NtClose (dir);
- res = 0;
- }
- else
- __seterrno_from_nt_status (status);
-
- return res;
-}
-
-int
-fhandler_disk_file::rmdir ()
-{
- extern NTSTATUS unlink_nt (path_conv &pc);
-
- if (!pc.isdir ())
- {
- set_errno (ENOTDIR);
- return -1;
- }
- if (!pc.exists ())
- {
- set_errno (ENOENT);
- return -1;
- }
-
- NTSTATUS status = unlink_nt (pc);
-
- /* Check for existence of remote dirs after trying to delete them.
- Two reasons:
- - Sometimes SMB indicates failure when it really succeeds.
- - Removing a directory on a Samba drive using an old Samba version
- sometimes doesn't return an error, if the directory can't be removed
- because it's not empty. */
- if (isremote ())
- {
- OBJECT_ATTRIBUTES attr;
- FILE_BASIC_INFORMATION fbi;
- NTSTATUS q_status;
-
- q_status = NtQueryAttributesFile (pc.get_object_attr (attr, sec_none_nih), &fbi);
- if (!NT_SUCCESS (status) && q_status == STATUS_OBJECT_NAME_NOT_FOUND)
- status = STATUS_SUCCESS;
- else if (NT_SUCCESS (status) && NT_SUCCESS (q_status))
- status = STATUS_DIRECTORY_NOT_EMPTY;
- }
- if (!NT_SUCCESS (status))
- {
- __seterrno_from_nt_status (status);
- return -1;
- }
- return 0;
-}
-
-/* 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 * 624 + 4 bytes. */
-
-#define DIR_NUM_ENTRIES 100 /* Cache size 62404 bytes */
-
-#define DIR_BUF_SIZE (DIR_NUM_ENTRIES \
- * (sizeof (FILE_ID_BOTH_DIR_INFORMATION) \
- + (NAME_MAX + 1) * sizeof (WCHAR)))
-
-struct __DIR_cache
-{
- char __cache[DIR_BUF_SIZE]; /* W2K needs this buffer 8 byte aligned. */
- ULONG __pos;
-};
-
-#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 (int fd)
-{
- DIR *dir;
- DIR *res = NULL;
-
- if (!pc.isdir ())
- set_errno (ENOTDIR);
- else if ((dir = (DIR *) malloc (sizeof (DIR))) == NULL)
- set_errno (ENOMEM);
- else if ((dir->__d_dirname = (char *) malloc ( sizeof (struct __DIR_cache)))
- == 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
- {
- cygheap_fdnew cfd;
- if (cfd < 0 && fd < 0)
- goto free_dirent;
-
- dir->__d_dirent->__d_version = __DIRENT_VERSION;
- dir->__d_cookie = __DIRENT_COOKIE;
- dir->__handle = INVALID_HANDLE_VALUE;
- dir->__d_position = 0;
- dir->__flags = (get_name ()[0] == '/' && get_name ()[1] == '\0')
- ? dirent_isroot : 0;
- dir->__d_internal = (unsigned) new __DIR_mounts (get_name ());
- d_cachepos (dir) = 0;
-
- if (!pc.iscygdrive ())
- {
- if (fd < 0)
- {
- /* opendir() case. Initialize with given directory name and
- NULL directory handle. */
- OBJECT_ATTRIBUTES attr;
- NTSTATUS status;
- IO_STATUS_BLOCK io;
- /* Tools like ls(1) call dirfd() to fetch the directory
- descriptor for calls to facl or fstat. The tight access mask
- used so far is not sufficient to reuse the handle for these
- calls, instead the facl/fstat calls find the handle to be
- unusable and have to re-open the file for reading attributes
- and control data. So, what we do here is to try to open the
- directory with more relaxed access mask which enables to use
- the handle for the aforementioned purpose. This should work
- in almost all cases. Only if it doesn't work due to
- permission problems, we drop the additional access bits and
- try again. */
- ACCESS_MASK fstat_mask = READ_CONTROL | FILE_READ_ATTRIBUTES;
-
- do
- {
- status = NtOpenFile (&get_handle (),
- SYNCHRONIZE | FILE_LIST_DIRECTORY
- | fstat_mask,
- pc.get_object_attr (attr, sec_none_nih),
- &io, FILE_SHARE_VALID_FLAGS,
- FILE_SYNCHRONOUS_IO_NONALERT
- | FILE_OPEN_FOR_BACKUP_INTENT
- | FILE_DIRECTORY_FILE);
- if (!NT_SUCCESS (status))
- {
- if (status == STATUS_ACCESS_DENIED && fstat_mask)
- fstat_mask = 0;
- else
- {
- __seterrno_from_nt_status (status);
- goto free_mounts;
- }
- }
- }
- while (!NT_SUCCESS (status));
- }
-
- /* 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.
-
- NFS clients hide dangling symlinks from directory queries,
- unless you use the FileNamesInformation info class.
- On newer NFS clients (>=Vista) FileIdBothDirectoryInformation
- works fine, but only if the NFS share is mounted to a drive
- letter. TODO: We don't test that here for now, but it might
- be worth to test if there's a speed gain in using
- FileIdBothDirectoryInformation, because it doesn't require to
- open the file to read the inode number. */
- if (pc.hasgood_inode ())
- {
- dir->__flags |= dirent_set_d_ino;
- if (pc.fs_is_nfs ())
- dir->__flags |= dirent_nfs_d_ino;
- else if (wincap.has_fileid_dirinfo ()
- && !pc.has_buggy_fileid_dirinfo ())
- dir->__flags |= dirent_get_d_ino;
- }
- }
- if (fd >= 0)
- dir->__d_fd = fd;
- else
- {
- /* Filling cfd 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... */
- cfd = this;
- dir->__d_fd = cfd;
- if (pc.iscygdrive ())
- cfd->nohandle (true);
- }
- set_close_on_exec (true);
- 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;
-}
-
-__ino64_t __stdcall
-readdir_get_ino (const char *path, bool dot_dot)
-{
- char *fname;
- struct __stat64 st;
- HANDLE hdl;
- OBJECT_ATTRIBUTES attr;
- IO_STATUS_BLOCK io;
- __ino64_t ino = 0;
-
- if (dot_dot)
- {
- fname = (char *) alloca (strlen (path) + 4);
- char *c = stpcpy (fname, path);
- if (c[-1] != '/')
- *c++ = '/';
- strcpy (c, "..");
- path = fname;
- }
- path_conv pc (path, PC_SYM_NOFOLLOW | PC_POSIX | PC_NOWARN | PC_KEEP_HANDLE);
- if (pc.isspecial ())
- {
- if (!stat_worker (pc, &st))
- ino = st.st_ino;
- }
- else if (!pc.hasgood_inode ())
- ino = hash_path_name (0, pc.get_nt_native_path ());
- else if ((hdl = pc.handle ()) != NULL
- || NT_SUCCESS (NtOpenFile (&hdl, READ_CONTROL,
- pc.get_object_attr (attr, sec_none_nih),
- &io, FILE_SHARE_VALID_FLAGS,
- FILE_OPEN_FOR_BACKUP_INTENT
- | (pc.is_rep_symlink ()
- ? FILE_OPEN_REPARSE_POINT : 0)))
- )
- {
- ino = pc.get_ino_by_handle (hdl);
- if (!ino)
- ino = hash_path_name (0, pc.get_nt_native_path ());
- }
- return ino;
-}
-
-int
-fhandler_disk_file::readdir_helper (DIR *dir, dirent *de, DWORD w32_err,
- DWORD attr, PUNICODE_STRING fname)
-{
- if (w32_err)
- {
- bool added = false;
- if ((de->d_ino = d_mounts (dir)->check_missing_mount (fname)))
- added = true;
- if (!added)
- {
- fname->Length = 0;
- return geterrno_from_win_error (w32_err);
- }
-
- attr = 0;
- dir->__flags &= ~dirent_set_d_ino;
- }
-
- /* Set d_type if type can be determined from file attributes. For .lnk
- symlinks, d_type will be reset below. Reparse points can be NTFS
- symlinks, even if they have the FILE_ATTRIBUTE_DIRECTORY flag set. */
- if (attr &&
- !(attr & (~FILE_ATTRIBUTE_VALID_FLAGS | FILE_ATTRIBUTE_REPARSE_POINT)))
- {
- if (attr & FILE_ATTRIBUTE_DIRECTORY)
- de->d_type = DT_DIR;
- /* FILE_ATTRIBUTE_SYSTEM might denote system-bit type symlinks. */
- else if (!(attr & FILE_ATTRIBUTE_SYSTEM))
- de->d_type = DT_REG;
- }
-
- /* Check for directory reparse point. These are potential volume mount
- points which have another inode than the underlying directory. */
- if ((attr & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT))
- == (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT))
- {
- HANDLE reph;
- OBJECT_ATTRIBUTES attr;
- IO_STATUS_BLOCK io;
-
- InitializeObjectAttributes (&attr, fname, pc.objcaseinsensitive (),
- get_handle (), NULL);
- de->d_type = readdir_check_reparse_point (&attr);
- if (de->d_type == DT_DIR)
- {
- /* Volume mountpoints are treated as directories. We have to fix
- the inode number, otherwise we have the inode number of the
- mount point, rather than the inode number of the toplevel
- directory of the mounted drive. */
- if (NT_SUCCESS (NtOpenFile (&reph, READ_CONTROL, &attr, &io,
- FILE_SHARE_VALID_FLAGS,
- FILE_OPEN_FOR_BACKUP_INTENT)))
- {
- de->d_ino = pc.get_ino_by_handle (reph);
- NtClose (reph);
- }
- }
- }
-
- /* Check for Windows shortcut. If it's a Cygwin or U/WIN symlink, drop the
- .lnk suffix and set d_type accordingly. */
- if ((attr & (FILE_ATTRIBUTE_DIRECTORY
- | FILE_ATTRIBUTE_REPARSE_POINT
- | FILE_ATTRIBUTE_READONLY)) == FILE_ATTRIBUTE_READONLY
- && fname->Length > 4 * sizeof (WCHAR))
- {
- UNICODE_STRING uname;
-
- RtlInitCountedUnicodeString (&uname,
- fname->Buffer
- + fname->Length / sizeof (WCHAR) - 4,
- 4 * sizeof (WCHAR));
- if (RtlEqualUnicodeString (&uname, &ro_u_lnk, TRUE))
- {
- tmp_pathbuf tp;
- UNICODE_STRING fbuf;
-
- tp.u_get (&fbuf);
- RtlCopyUnicodeString (&fbuf, pc.get_nt_native_path ());
- RtlAppendUnicodeToString (&fbuf, L"\\");
- RtlAppendUnicodeStringToString (&fbuf, fname);
- fbuf.Buffer += 4; /* Skip leading \??\ */
- fbuf.Length -= 4 * sizeof (WCHAR);
- if (fbuf.Buffer[1] != L':') /* UNC path */
- {
- *(fbuf.Buffer += 2) = L'\\';
- fbuf.Length -= 2 * sizeof (WCHAR);
- }
- path_conv fpath (&fbuf, PC_SYM_NOFOLLOW);
- if (fpath.issymlink ())
- {
- fname->Length -= 4 * sizeof (WCHAR);
- de->d_type = DT_LNK;
- }
- else if (fpath.isfifo ())
- {
- fname->Length -= 4 * sizeof (WCHAR);
- de->d_type = DT_FIFO;
- }
- else if (fpath.is_fs_special ())
- {
- fname->Length -= 4 * sizeof (WCHAR);
- de->d_type = S_ISCHR (fpath.dev.mode) ? DT_CHR : DT_BLK;
- }
- }
- }
-
- sys_wcstombs (de->d_name, NAME_MAX + 1, fname->Buffer,
- fname->Length / sizeof (WCHAR));
-
- /* Don't try to optimize relative to dir->__d_position. On several
- filesystems it's no safe bet that "." and ".." entries always
- come first. */
- if (de->d_name[0] == '.')
- {
- if (de->d_name[1] == '\0')
- dir->__flags |= dirent_saw_dot;
- else if (de->d_name[1] == '.' && de->d_name[2] == '\0')
- dir->__flags |= dirent_saw_dot_dot;
- }
- return 0;
-}
-
-int
-fhandler_disk_file::readdir (DIR *dir, dirent *de)
-{
- int res = 0;
- NTSTATUS status = STATUS_SUCCESS;
- PFILE_ID_BOTH_DIR_INFORMATION buf = NULL;
- PWCHAR FileName;
- ULONG FileNameLength;
- ULONG FileAttributes = 0;
- IO_STATUS_BLOCK io;
- UNICODE_STRING fname;
-
- /* 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 (get_handle (), NULL, NULL, NULL, &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. There are also
- hacked versions of Samba 3.0.x out there (Debian-based it seems),
- which return STATUS_NOT_SUPPORTED rather than handling this info
- class. 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 (!NT_SUCCESS (status) && status != STATUS_NO_MORE_FILES
- && (status == STATUS_INVALID_LEVEL
- || status == STATUS_NOT_SUPPORTED
- || status == STATUS_INVALID_PARAMETER
- || status == STATUS_INVALID_NETWORK_RESPONSE
- || 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 (get_handle (), NULL, NULL,
- NULL, &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 (get_handle (), NULL, NULL, NULL, &io,
- d_cache (dir), DIR_BUF_SIZE,
- (dir->__flags & dirent_nfs_d_ino)
- ? FileNamesInformation
- : FileBothDirectoryInformation,
- FALSE, NULL, dir->__d_position == 0);
- }
-
-go_ahead:
-
- if (status == STATUS_NO_MORE_FILES)
- /*nothing*/;
- else if (!NT_SUCCESS (status))
- debug_printf ("NtQueryDirectoryFile failed, status %p, win32 error %lu",
- status, RtlNtStatusToDosError (status));
- else
- {
- 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;
- FileNameLength = buf->FileNameLength;
- FileAttributes = buf->FileAttributes;
- if ((dir->__flags & dirent_set_d_ino))
- de->d_ino = buf->FileId.QuadPart;
- }
- else if ((dir->__flags & dirent_nfs_d_ino))
- {
- FileName = ((PFILE_NAMES_INFORMATION) buf)->FileName;
- FileNameLength = ((PFILE_NAMES_INFORMATION) buf)->FileNameLength;
- }
- else
- {
- FileName = ((PFILE_BOTH_DIRECTORY_INFORMATION) buf)->FileName;
- FileNameLength =
- ((PFILE_BOTH_DIRECTORY_INFORMATION) buf)->FileNameLength;
- FileAttributes =
- ((PFILE_BOTH_DIRECTORY_INFORMATION) buf)->FileAttributes;
- }
- RtlInitCountedUnicodeString (&fname, FileName, FileNameLength);
- de->d_ino = d_mounts (dir)->check_mount (&fname, de->d_ino);
- if (de->d_ino == 0 && (dir->__flags & dirent_set_d_ino))
- {
- /* Don't try to optimize relative to dir->__d_position. On several
- filesystems it's no safe bet that "." and ".." entries always
- come first. */
- if (FileNameLength == sizeof (WCHAR) && FileName[0] == '.')
- de->d_ino = pc.get_ino_by_handle (get_handle ());
- else if (FileNameLength == 2 * sizeof (WCHAR)
- && FileName[0] == L'.' && FileName[1] == L'.')
- {
- if (!(dir->__flags & dirent_isroot))
- de->d_ino = readdir_get_ino (get_name (), true);
- else
- de->d_ino = pc.get_ino_by_handle (get_handle ());
- }
- else
- {
- OBJECT_ATTRIBUTES attr;
- HANDLE hdl;
- NTSTATUS f_status;
-
- InitializeObjectAttributes (&attr, &fname,
- pc.objcaseinsensitive (),
- get_handle (), NULL);
- /* FILE_OPEN_REPARSE_POINT on NFS is a no-op, so the normal
- NtOpenFile here returns the inode number of the symlink target,
- rather than the inode number of the symlink itself.
-
- Worse, trying to open a symlink without setting the special
- "ActOnSymlink" EA triggers a bug in Windows 7 which results
- in a timeout of up to 20 seconds, followed by two exceptions
- in the NT kernel.
-
- Since both results are far from desirable, we open symlinks
- on NFS so that we get the right inode and a happy W7.
- And, since some filesystems choke on the EAs, we don't
- use them unconditionally. */
- f_status = (dir->__flags & dirent_nfs_d_ino)
- ? NtCreateFile (&hdl, READ_CONTROL, &attr, &io,
- NULL, 0, FILE_SHARE_VALID_FLAGS,
- FILE_OPEN, FILE_OPEN_FOR_BACKUP_INTENT,
- &nfs_aol_ffei, sizeof nfs_aol_ffei)
- : NtOpenFile (&hdl, READ_CONTROL, &attr, &io,
- FILE_SHARE_VALID_FLAGS,
- FILE_OPEN_FOR_BACKUP_INTENT
- | FILE_OPEN_REPARSE_POINT);
- if (NT_SUCCESS (f_status))
- {
- /* We call NtQueryInformationFile here, rather than
- pc.get_ino_by_handle(), otherwise we can't short-circuit
- dirent_set_d_ino correctly. */
- FILE_INTERNAL_INFORMATION fai;
- f_status = NtQueryInformationFile (hdl, &io, &fai, sizeof fai,
- FileInternalInformation);
- NtClose (hdl);
- if (NT_SUCCESS (f_status))
- {
- if (pc.isgood_inode (fai.FileId.QuadPart))
- de->d_ino = fai.FileId.QuadPart;
- else
- /* Untrusted file system. Don't try to fetch inode
- number again. */
- dir->__flags &= ~dirent_set_d_ino;
- }
- }
- }
- }
- }
-
- if (!(res = readdir_helper (dir, de, RtlNtStatusToDosError (status),
- FileAttributes, &fname)))
- dir->__d_position++;
- else if (!(dir->__flags & dirent_saw_dot))
- {
- strcpy (de->d_name , ".");
- de->d_ino = pc.get_ino_by_handle (get_handle ());
- de->d_type = DT_DIR;
- dir->__d_position++;
- dir->__flags |= dirent_saw_dot;
- res = 0;
- }
- else if (!(dir->__flags & dirent_saw_dot_dot))
- {
- strcpy (de->d_name , "..");
- if (!(dir->__flags & dirent_isroot))
- de->d_ino = readdir_get_ino (get_name (), true);
- else
- de->d_ino = pc.get_ino_by_handle (get_handle ());
- de->d_type = DT_DIR;
- dir->__d_position++;
- dir->__flags |= dirent_saw_dot_dot;
- res = 0;
- }
-
- syscall_printf ("%d = readdir (%p, %p) (L\"%lS\" > \"%ls\") (attr %p > type %d)",
- res, dir, &de, res ? NULL : &fname, res ? "***" : de->d_name,
- FileAttributes, de->d_type);
- return res;
-}
-
-long
-fhandler_disk_file::telldir (DIR *dir)
-{
- return dir->__d_position;
-}
-
-void
-fhandler_disk_file::seekdir (DIR *dir, long loc)
-{
- rewinddir (dir);
- while (loc > dir->__d_position)
- if (!::readdir (dir))
- break;
-}
-
-void
-fhandler_disk_file::rewinddir (DIR *dir)
-{
- 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. */
- OBJECT_ATTRIBUTES attr;
- NTSTATUS status;
- IO_STATUS_BLOCK io;
- HANDLE new_dir;
-
- pc.init_reopen_attr (&attr, get_handle ());
- status = NtOpenFile (&new_dir, SYNCHRONIZE | FILE_LIST_DIRECTORY,
- &attr, &io, FILE_SHARE_VALID_FLAGS,
- 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: %p",
- get_name (), status);
- else
- {
- NtClose (get_handle ());
- set_io_handle (new_dir);
- }
- }
- dir->__d_position = 0;
- d_mounts (dir)->rewind ();
-}
-
-int
-fhandler_disk_file::closedir (DIR *dir)
-{
- int res = 0;
- NTSTATUS status;
-
- delete d_mounts (dir);
- if (!get_handle ())
- /* ignore */;
- else if (get_handle () == INVALID_HANDLE_VALUE)
- {
- set_errno (EBADF);
- res = -1;
- }
- else if (!NT_SUCCESS (status = NtClose (get_handle ())))
- {
- __seterrno_from_nt_status (status);
- res = -1;
- }
- syscall_printf ("%d = closedir (%p, %s)", res, dir, get_name ());
- 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;
-}
-
-void
-fhandler_cygdrive::set_drives ()
-{
- pdrive = pdrive_buf;
- ndrives = GetLogicalDriveStrings (sizeof pdrive_buf, pdrive_buf) / DRVSZ;
-}
-
-int
-fhandler_cygdrive::fstat (struct __stat64 *buf)
-{
- fhandler_base::fstat (buf);
- buf->st_ino = 2;
- buf->st_mode = S_IFDIR | STD_RBITS | STD_XBITS;
- if (!ndrives)
- set_drives ();
- char flptst[] = "X:";
- int n = ndrives;
- for (const char *p = pdrive; p && *p; p = strchr (p, '\0') + 1)
- if (is_floppy ((flptst[0] = *p, flptst))
- || GetFileAttributes (p) == INVALID_FILE_ATTRIBUTES)
- n--;
- buf->st_nlink = n + 2;
- return 0;
-}
-
-DIR *
-fhandler_cygdrive::opendir (int fd)
-{
- DIR *dir;
-
- dir = fhandler_disk_file::opendir (fd);
- if (dir && !ndrives)
- set_drives ();
-
- return dir;
-}
-
-int
-fhandler_cygdrive::readdir (DIR *dir, dirent *de)
-{
- char flptst[] = "X:";
-
- 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 (!is_floppy ((flptst[0] = *pdrive, flptst))
- && GetFileAttributes (pdrive) != INVALID_FILE_ATTRIBUTES)
- break;
- pdrive = strchr (pdrive, '\0') + 1;
- }
- *de->d_name = cyg_tolower (*pdrive);
- de->d_name[1] = '\0';
- user_shared->warned_msdos = true;
- de->d_ino = readdir_get_ino (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 = pdrive_buf;
- dir->__d_position = 0;
-}
-
-int
-fhandler_cygdrive::closedir (DIR *dir)
-{
- pdrive = pdrive_buf;
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 09:55:22 +0300