Revamp advisory file locking to avoid cross reference pointers as well
as to allow BSD flock semantics. More agressively delete unused nodes
and sync objects.
* fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment.
(fhandler_base::node): Remove.
(fhandler_base::unique_id): Add.
(fhandler_base::del_my_locks): New method.
(get_ino): Rename from get_namehash. Change usage throughout Cygwin.
(get_unique_id): New method.
* fhandler.cc (fhandler_base::close): Call own del_my_locks method.
Fix comment.
(fhandler_base::fhandler_base): Accommodate new and changed members.
(fhandler_base::fixup_after_fork): Call del_my_locks.
(fhandler_base::fixup_after_exec): Ditto for files with close-on-exec
flag set.
* fhandler_disk_file.cc (get_ino_by_handle): Rename from
readdir_get_ino_by_handle. Accommodate throughout.
(fhandler_base::open_fs): Fill ino with inode number if FS has good
inodes. Allocate a LUID and store in unique_id to recognize file
descriptors referencing the same file object.
* flock.cc: Drop flock TODO comments. Use explicit types __dev32_t
and __ino64_t instead of dev_t and ino_t.
(LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length.
(get_obj_handle_count): New method.
(lockf_t::lf_id): Change type to long long.
(inode_t::get_lock_obj_handle_count): Drop in favor of static function
get_obj_handle_count.
(inode_t::del_locks): Remove.
(inode_t::get): Add create_if_missing flag argument.
(inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock
locks. Return if node can be deleted or not.
(inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx.
(fixup_lockf_after_fork): Remove.
(fhandler_base::del_my_locks): New method.
(fixup_lockf_after_exec): Check if node can be deleted.
(inode_t::get): Only create node if create_if_missing is set. Lock
the returned node here before unlocking the node list.
(inode_t::get_all_locks_list): Accommodate new lf_id length.
(inode_t::create_lock_obj): Ditto.
(lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const.
Set lf_obj instead of returning a handle.
(lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters
allow it. Explain how it's supposed to work.
(fhandler_disk_file::lock): Only fetch file length in SEEK_END case.
Use NtQueryInformationFile(FileStandardInformation) instead of
calling fstat_by_handle. Always unlock node before returning.
Use fhandler's unique id to create lf_id for BSD flock locks.
Rely on node lock from inode_t::get. Call del_lock_obj on removed
locks here to allow explicit unlocking. Delete node if no lock exists
on the file anymore.
(lf_setlock): Get file handle as additional parameter. Handle the fact
that lf_getblock now always opens the attached event object. Reactivate
erroneously applied patch which deactivates setting thread priority.
Additionally handle blocking on BSD flock locks.
(lf_clearlock): Get file handle as additional parameter.
(lf_getlock): Close event handle opened by lf_getblock.
(lf_getblock): Open potentially blocking event object here and check
its signal state if it's a BSD flock lock.
(lf_wakelock): Get file handle as additional parameter.
* fork.cc (frok::child): Drop call to fixup_lockf_after_fork.
* ntdll.h (struct _EVENT_BASIC_INFORMATION): Define.
(enum _EVENT_INFORMATION_CLASS): Define.
(NtQueryEvent): Declare.
* fhandler.h (fhandler_base::fs_flags): Remove.
(fhandler_base::set_fs_flags): Remove.
(fhandler_base::get_fs_flags): Remove.
* fhandler.cc (fhandler_base::write): Check for sparse file using
pc.fs_flags().
* fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto.
The return of the volume serial number in fs_info.
* fhandler.h (get_dev): New method.
* fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to
NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use
get_dev() method.
* fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number
to generate fifo name.
* path.h (fs_info::sernum): New member.
(fs_info::serial_number): New method.
(path_conv::fs_serial_number): New method.
* path.cc (fs_info::update): Fetch volume serial number and store in
sernum.
constants.
(dtable::init_std_file_from_handle): Reorganize pipe handling to try to catch
special tty case.
(build_fh_name_worker): Declare for common use.
(build_fh_name): Define char version.
(build_fh_name): Define (currently unused) UNICODE_STRING version.
(decode_tty): Detect if pipe is actually a cygwin tty, returning the tty name
in the buffer.
(handle_to_fn): Reorganize to use wide characters.
* dtable.h (build_fh_name): Declare (currently unused) UNICODE_STRING version.
* fhandler_tty.cc (fhandler_pty_master::setup): Use
fhandler_pipe::create_selectable to create a pipe with a given name.
* pipe.cc (pipe_handler): Make returned handle inheritable.
(fhandler_pipe::create_selectable): Take an optional name. Use a standard
cygwin introducer for the name.
* path.cc (path_conv::check): Make first argument const.
* path.h (path_conv::check): Ditto for declaration.
(path_conv::path_conv): Ditto for UNICODE_STRING version.
munging. Convert all chars in the 0xf0xx area to it's ascii equivalent.
* path.cc (normalize_posix_path): Don't treat "X:foo" as windows path,
only "a:\foo".
(tfx_chars): New transformation table for special DOS chars.
(tfx_chars_managed): Ditto, plus transformation of uppercase ASCII
chars.
(transform_chars): New function.
(get_nt_native_path): Make static. Call transform_chars for all valid
FS paths. Get additional flag if file is managed or not. Accommodate
throughout.
(getfileattr): Get additional flag if file is managed or not.
Accommodate throughout.
(path_conv::check): Disable special handling for trailing dots and
spaces.
(mount_item::build_win32): Disable code for managed paths.
(mount_info::conv_to_posix_path): Ditto.
* path.h (get_nt_native_path): Remove declaration.
* autoload.cc (CreateDesktopW): Replace CreateDesktopA.
(CreateWindowStationW): Replace CreateWindowStationA.
(GetUserObjectInformationW): Replace GetUserObjectInformationA.
* cygheap.h (cwdstuff::get): Assume default buffer size NT_MAX_PATH.
* cygtls.cc (_cygtls::remove): Free temporary TLS path buffers.
* cygtls.h (TP_NUM_C_BUFS): Define.
(TP_NUM_W_BUFS): Define.
(class tls_pathbuf): New class to store pointers to thread local
temporary path buffers.
(_local_storage::pathbufs): New member.
* environ.cc (win_env::add_cache): Use temporary TLS path buffer instead
of stack based buffer.
(posify): Get temporary outenv buffer from calling function.
(environ_init): Create temporary TLS path buffer for posify.
(build_env): Create Windows environment block as WCHAR buffer.
* environ.h (build_env): Change declaration accordingly.
* external.cc (sync_winenv): Accommodate build_env change.
* fhandler_console.cc (fhandler_console::need_invisible): Use
GetUserObjectInformationW and CreateWindowStationW.
* fhandler_process.cc (format_process_maps): Use temporary TLS path
buffer instead of stack based buffer.
* fork.cc (frok::parent): Convert to use CreateProcessW.
* path.cc: Throughout use temporary TLS path buffers instead of stack
based buffer. Replace checks for CYG_MAX_PATH by checks for
NT_MAX_PATH.
(getfileattr): New function to replace GetFileAttributesA.
(normalize_win32_path): Remove Win32 and NT long path prefixes.
(getwd): Assume PATH_MAX + 1 buffer per SUSv3.
* path.h (class path_conv): Set path buffer to size NT_MAX_PATH.
(iswdrive): Define.
* pinfo.cc (commune_process): Use temporary TLS path buffer instead of
stack based buffer.
* registry.cc (get_registry_hive_path): Ditto.
(load_registry_hive): Ditto.
* spawn.cc (spawn_guts): Convert to use CreateProcessW and
CreateProcessAsUserW.
(av::fixup): Open/close file using NtOpenFile/NtClose.
* syscalls.cc (mknod_worker): Allow PATH_MAX file name.
(mknod32): Ditto.
(getusershell): Ditto.
* tls_pbuf.cc: New file implementing tls_pathbuf and tmp_pathbuf
methods.
* tls_pbuf.h: New header for files using tmp_pathbuf.
* tlsoffsets.h: Regenerate.
* winsup.h (NT_MAX_PATH): Define as 32767 to avoid USHORT overflow.
* path.cc (struct smb_extended_info): Define.
(fs_info::update): Request object id info to get Samba information.
Set flags according to new implementation.
* path.h (struct fs_info): Add samba_version to status_flags.
Implement flags() and samba_version() using IMPLEMENT_STATUS_FLAG.
(NtQueryAttributesFile): Move to maintain alphabetical order of
declarations. Add comment to note that timestamp information returned
by NtQueryAttributesFile is unreliable.
* path.h (etc::changed_h): Move here.
(etc::fn): Change type to OBJECT_ATTRIBUTES.
(etc::last_modified): Change type to LARGE_INTEGER.
(etc::init): Take PUNICODE_STRING as second argument.
* path.cc: Accomodate above changes.
(etc::test_file_change): Use NT native functions.
(etc::dir_changed): Ditto.
* uinfo.cc (pwdgrp::load): Call etc::init with NT native path.
* fhandler_disk_file.cc (fhandler_disk_file::link): Drop extern
declaration of stat_suffixes. Use NT native path in debug output.
(fhandler_base::utimes_fs): Simplify closeit case. Use close_fs
to close newly opened file handle.
(fhandler_base::open_fs): Use NT native path in debug output.
* path.cc: Throughout drop extern declaration of stat_suffixes.
* path.h (stat_suffixes): Declare.
* sec_acl.cc (acl_worker): Drop extern declaration of stat_suffixes.
* times.cc (utimes_worker): Take path_conv as parameter instead of
single-byte pathnam, drop nofollow argument, accommodate throughout.
Compare UNICODE paths when enumerating file descriptors. Fix
formatting. Use NT native path in debug output.
for binary in case of .exe files.
* ntdll.h (RtlPrefixUnicodeString): Declare.
* path.cc (path_conv::is_binary): New method.
* path.h (path_conv::is_binary): Declare.
* syscalls.cc (rename_append_suffix): New static helper function for
rename.
(rename): Rewrite. New suffix tests. Use native NT functions.
readdir_get_ino.
* fhandler.h (fhandler_disk_file::readdir_helper): Switch file name
parameter to PUNICODE_STRING.
* fhandler_disk_file.cc: Drop including ntdef.h.
(class __DIR_mounts): Store mount points in UNICODE. Additionally
store cygdrive prefix in unicode here. Change methods accordingly.
(__DIR_mounts::eval_ino): Call new stat_worker instead of lstat64.
(__DIR_mounts::~__DIR_mounts): New destructor to free UNICODE buffers.
(path_conv::ndisk_links): Rewrite using native NT functions.
(fhandler_base::fstat_by_handle): Use NAME_MAX instead of CYG_MAX_PATH.
Always set pfvi->VolumeSerialNumber to non-0. Remove last resort
code.
(fhandler_base::fstat_by_name): Rewrite using native NT functions.
(fhandler_base::fstat_fs): Always call fstat_by_name if fstat_by_handle
fails.
(fhandler_base::fstat_helper): Rely on dwVolumeSerialNumber.
(fhandler_disk_file::facl): Call fstat_by_name if fstat_by_handle fails.
(DIR_BUF_SIZE): Define using NAME_MAX instead of CYG_MAX_PATH.
(__DIR_cache): Remove __name.
(d_dirname): Remove.
(fhandler_disk_file::opendir): Drop pathname length check.
Remove outdated comment. Use get_name method instead of accessing
pc.normalized_path directly.
(readdir_get_ino): Drop unused dir parameter. Accomodate throughout.
Allocate fname dynamically. Call new stat_worker instead of lstat64.
Call NtOpenFile instead of CreateFile. Call NtClose instead of
CloseHandle.
(fhandler_disk_file::readdir_helper): Use native NT functions.
Check for volume mount points and use correct inode number.
(fhandler_disk_file::readdir): Simplify slightly.
Use get_name instead of pc.normalized_path.
(fhandler_disk_file::rewinddir): Use RtlInitUnicodeString.
(fhandler_cygdrive::fstat): Ignore floppy drives. Set st_nlink
correctly.
(fhandler_cygdrive::readdir): Ignore floppy drives.
* fhandler_netdrive.cc (fhandler_netdrive::readdir): Accommodate
change to readdir_get_ino.
* fhandler_proc.cc (PROC_DIR_COUNT): Define.
(fhandler_proc::fstat): Evaluate correct link count for /proc.
* ntdll.h (struct _FILE_DIRECTORY_INFORMATION): Define.
(NtFsControlFile): Declare.
(RtlAppendUnicodeToString): Declare.
(RtlAppendUnicodeStringToString): Declare.
(RtlCompareUnicodeString): Declare.
(RtlCopyUnicodeString): Declare.
(RtlCreateUnicodeStringFromAsciiz): Declare.
(RtlEqualUnicodeString): Declare.
(RtlFreeUnicodeString): Declare.
(RtlInitEmptyUnicodeString): Declare.
(RtlSecondsSince1970ToTime): Declare.
(RtlInitEmptyUnicodeString): Define as inline function.
(RtlInitCountedUnicodeString): Define as inline function.
* path.cc (path_conv::check): New method with PUNICODE_STRING as path,
preliminary implementation.
(mount_info::get_mounts_here): Change to create UNICODE_STRINGs.
Also copy cygpath prefix into UNICODE_STRING.
(is_floppy): Drop 9x consideration.
* path.h: Drop including ntdef.h.
(path_conv::check): Add declaration.
(path_conv::path_conv): Add constructor for UNICODE_STRING paths.
* shared_info.h (mount_info::get_mounts_here): Change declaration.
* syscalls.cc: Drop forward declaration of stat_worker.
(stat_worke): Take path_conv as parameter. Drop nofollow flag.
(stat64): Create matching path_conv and call stat_worker with it.
(lstat64): Ditto.
* winsup.h: Include ntdef.h.
(stat_worker): Declare.
(readdir_get_ino): Change declaration.
variables. Call pc.get_object_attr to create object attributes.
* fhandler_disk_file.cc (fhandler_disk_file::opendir): Ditto.
* syscalls.cc (unlink_nt): Ditto.
* path.cc (path_conv::set_normalized_path): Set wide_path to NULL.
(path_conv::get_nt_native_path): Drop parameter. Create path in
wide_path/uni_path members.
(path_conv::get_object_attr): New method to create object attributes.
(path_conv::get_wide_win32_path): New method to create Win32 wide path.
(path_conv::check): Initialize wide_path to NULL.
(path_conv::~path_conv): cfree wide_path.
* path.h (class path_conv): New members wide_path and uni_path.
Add declarations of get_object_attr and get_wide_win32_path.
(path_conv::path_conv): Initialize wide_path to NULL.
(path_conv::get_nt_native_path): Drop parameter.
* ntdll.h (struct _FILE_RENAME_INFORMATION): Define.
* path.cc (fs_info::update): Note length of rootdir prefix in
root_len.
(get_nt_native_path): New function, taking over functionality of
path_conv::get_nt_native_path.
(path_conv::get_nt_native_path): Just call get_nt_native_path.
* path.h (get_nt_native_path): Declare.
(struct fs_info): New member root_len.
(fs_info::length): New inline method returning root_len.
(path_conv::rootdir): New inline method returning rootdir prefix.
* syscalls.cc (try_to_bin): Rewrite using only system calls.
(unlink_nt): Call try_to_bin with additional handle to open file
parameter.
(statvfs): Use path_conv::rootdir method.
* wincap.h: Define has_recycle_dot_bin throughout.
* wincap.cc: Ditto.
(rmdir): Don't check last path component for "..".
* fhandler_disk_file.cc (fhandler_disk_file::rmdir): Drop kludge
which tries to allow deleting the current working directory.
* path.cc (has_dot_last_component): Add parameter to indicate testing
for "..". Take trailing slash into account.
(symlink_info::posixify): Rely on cygheap->cwd.win32 having a
useful value.
(cwdstuff::init): Initialize cygheap->cwd with current working
directory. Change to windows_system_directory afterwards.
(cwdstuff::set): Never call SetCurrentDirectory here. Just check
if changing into target directory would be allowed. Add comment to
explain why.
* path.h (has_dot_last_component): Declare with second parameter.
* pinfo.cc (pinfo::zap_cwd): Remove.
(pinfo::exit): Drop call to zap_cwd.
* pinfo.h (class pinfo): Remove declaration of zap_cwd.
* spawn.cc (spawn_guts): Set current working directory for non-Cygwin
child applications. Drop call to zap_cwd.
Change FS_IS_SAMBA and FS_IS_SAMBA_WITH_QUOTA and their usage
accordingly. Define FS_IS_NETAPP_DATAONTAP. Recognize NetApp device
and store in is_netapp flag. Mark NetApp device as having no good
inodes.
* path.h (struct fs_info): Add is_netapp flag. Add matching accessors.
to take file size and inode number as 64 bit values.
* fhandler_disk_file.cc (FS_IS_SAMBA): Move to path.cc
(FS_IS_SAMBA_WITH_QUOTA): Ditto.
(path_conv::hasgood_inode): Delete.
(path_conv::is_samba): Delete.
(path_conv::isgood_inode): Centralized function to recognize
a good inode number.
(fhandler_base::fstat_by_handle): Constify fvi_size and fai_size.
Accomodate argument change in fstat_helper.
(fhandler_base::fstat_by_name): Ditto.
(fhandler_base::fstat_helper): Accomodate argument change. Call
path_conv::isgood_inode to recognize good inodes.
(fhandler_disk_file::opendir): Explain Samba weirdness here.
Call path_conv::fs_is_samba instead of path_conv::is_samba.
(fhandler_disk_file::readdir): Add STATUS_INVALID_INFO_CLASS
as valid return code from NtQueryDirectoryFile to indicate that
FileIdBothDirectoryInformation is not supported.
Call path_conv::isgood_inode to recognize good inodes.
* ntdll.h (STATUS_INVALID_INFO_CLASS): Define.
* path.cc (fs_info::update): Rework file system recognition
and set appropriate flags.
* path.h (struct fs_info): Add is_ntfs, is_samba and is_nfs flags.
Constify pure read accessors.
path_conv::hasgood_inode.
(path_conv::is_samba): New method.
(fhandler_base::fstat_by_handle): Don't even try to use
FileIdBothDirectoryInformation on Samba.
* path.h (class path_conv): Declare is_samba method.
* path.h (enum fe_types): Add FE_DLL value.
* spawn.cc (std_suffixes): Remove.
(exe_suffixes): New suffix_info for executing files.
(dll_suffixes): New suffix_info for searching shared libraries.
(perhaps_suffix): Add opt argument. Use dll_suffixes if FE_DLL
option is given, exe_suffixes otherwise.
(find_exec): Propagate opt argument to perhaps_suffix. Drop suffix
check when testing execute permission.
(spawn_guts): Call perhaps_suffix with FE_NADA opt argument.
* dir.cc (__opendir_with_d_ino): Just call opendir.
(opendir): Remove CYGWIN_VERSION_CHECK_FOR_NEEDS_D_INO handling.
(readdir_worker): Only try generating d_ino if it's 0.
Utilize namehash of directories fhandler. Call readdir_get_ino to
generate d_ino for "..".
(seekdir64): Keep dirent_set_d_ino flag.
* fhandler.h (enum dirent_states): Add dirent_get_d_ino.
(class fhandler_disk_file): Declare new private methods readdir_helper
and readdir_9x.
* fhandler_disk_file.cc (path_conv::hasgood_inode): New method to
evaluate if a filesystem has reliable inode numbers.
(fhandler_base::fstat_by_handle): Accomodate structure member name
change from IndexNumber to FileId.
(fhandler_base::fstat_helper): Call hasgood_inode here.
(fhandler_disk_file::opendir): Call fhaccess only for real files.
Don't append '*' to __d_dirname here, move to readdir_9x. On NT,
open directory handle here. Set dirent_get_d_ino and dirent_set_d_ino
flags according to wincap and filesystem.
(fhandler_disk_file::readdir_helper): New method to implement readdir
postprocessing only once.
(readdir_get_ino_by_handle): New static function.
(readdir_get_ino): New function to centralize inode number evaluation
in case inode number hasn't been returned by NtQueryDirectoryFile.
(fhandler_disk_file::readdir): Move old functionality to readdir_9x.
Call readdir_9x when on 9x/Me. Implement NT specific readdir here.
(fhandler_disk_file::readdir_9x): Move 9x specific readdir here.
(fhandler_disk_file::seekdir): Accomodate new NT readdir method.
(fhandler_disk_file::closedir): Ditto.
(fhandler_cygdrive::fstat): Set d_ino to namehash. Add comment.
(fhandler_cygdrive::opendir): Call get_namehash to prepare later
correct evaluation of d_ino.
(fhandler_cygdrive::readdir): Replace recursion with loop. Evaluate
drive's d_ino by calling readdir_get_ino.
* fhandler_proc.cc (fhandler_proc::readdir): Set dirent_saw_dot and
dirent_saw_dot_dot to avoid seeing . and .. entries twice.
* fhandler_process.cc (fhandler_process::readdir): Ditto.
* fhandler_registry.cc (fhandler_registry::readdir): Ditto.
* ntdll.h (STATUS_INVALID_PARAMETER): New define.
(STATUS_INVALID_LEVEL): New define.
(struct _FILE_INTERNAL_INFORMATION): Rename member IndexNumber to
FileId (as in Nebbitt).
* path.h (path_conv::hasgood_inode): Now implemented in
fhandler_disk_file.cc.
* wincap.h (wincaps::has_fileid_dirinfo): New element.
* wincap.cc: Implement above element throughout.
* winsup.h (readdir_get_ino): Add declaration.
* include/sys/dirent.h (struct dirent): Slightly rename structure
members to accomodate changes.
Remove __USE_EXPENSIVE_CYGWIN_D_INO handling and declaration of
__opendir_with_d_ino.
(_major): Ditto.
(device::is_fs_special): New function.
* fhandler_disk_file.cc (fhandler_base::fstat_helper): Set the size to 0 for
devices rather than reporting the size of the symlink.
(fhandler_disk_file::readdir): Use is_fs_special to determine if .lnk should be
stripped.
* path.cc: Rename symlink_info::is_symlink to symlink_info::issymlink
throughout.
(symlink_info::isdevice): New field.
(path_conv::check): Use 'isdevice' to determine if just-parsed entity is a
device rather than relying on non-zero major/minor.
(symlink_info::parse_device): Set isdevice to true if we've discovered a
device.
(symlink_info::check): Clear isdevice field prior to processing. Use isdevice
to control debugging output.
(symlink_info::set): Set isdevice to false.
* path.h (path_conv::is_fs_special): New function.
* devices.cc: Regenerate.
file attributes argument.
* fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Use
file attributes evaluated from NtQueryFileInformation or
FileInformationByHandle in call to fstat_helper.
Set pc.fileattr from just evaluated file attributes here.
(fhandler_base::fstat_by_name): Use file attributes evaluated from
FindFileFirst or default attribute in call to fstat_helper.
Set pc.fileattr from just evaluated file attributes here.
(fhandler_base::fstat_helper): Use file attributes given as argument,
not file attributes stored in this fhandler, since this information
is potentially wrong. Add comment to explain this.
* path.h (has_attribute): New global inline function.
(path_conv::set_attributes): New method to change fileattr.
warning.
* path.h (path_conv::set_cygexec): New function.
* spawn.cc (av::iscygwin): Eliminate.
(av::av): Don't initialize iscygwin.
(spawn_guts): Just use real_path.iscygexec for all tests.
(av::fixup): Short circuit test if .exe extension and known cygexec. Set
cygexec flag appropriately if we find that program uses cygwin1.dll.
* path.h (enum pathconv_arg): Change PC_FULL to PC_NOUILL.
* path.cc (path_conv::check): Test for PC_NOFULL rather than !PC_FULL.
(cygwin_conv_to_win32_path): Use PC_NOFULL to force non-absolute path.
* dir.cc (mkdir): Check path for writability.
(rmdir): Ditto. Remove check for special directories.
* path.cc (path_conv::check): Set PATH_RO for virtual devices. Set error if
read-only and asked for writability.
* path.h (pathconv_arg): Add PC_WRITABLE.
(path_types): Add PATH_RO.
(path_conv::isro): Add (currently unused) check for read-only filesystem.
Return "ENOSHARE" when we know a share doesn't exist.
* include/sys/mount.h: Add MOUNT_RO flag.
* autoload.cc (WNetGetResourceInformationA): Import.
* fhandler_netdrive.cc (fhandler_netdrive::exists): Detect actual existence of
remote system rather than always assuming that it exists.
(__main): Don't rely on atexit to run dtors.
(do_exit): Specifically call do_global_dtors here.
(cygwin_exit): Ditto.
* dll_init.cc (dll_global_dtors): Make global. Only run dtors once.
(dll_list::init): Just set flag that dtors should be run. Don't rely on
atexit.
* dll_init.h (dll_global_dtors): Declare.
* exceptions.cc (sigrelse): Define.
* path.h (is_fs_device): New method.
(is_lnk_special): Ditto.
* fhandler_disk_file.cc (fhandler_disk_file::link): Use "is_lnk_special" rather
than "is_lnk_symlink".
* syscalls.cc (rename): Ditto.
* hookapi.cc (ld_preload): Use colon as a separator rather than space.
* path.h (is_floppy): Declare.
* syscalls.cc (sync): Check for floppies on A: and B: in guid case.
Don't call setmntent in non-guid case but evaluate drive bit mask
locally.
(path_types): Define PATH_NO_ACCESS_CHECK == PC_NO_ACCESS_CHECK.
* path.cc (symlink_info::check_sysfile): Move to symlink_info class and
eliminate arguments that are part of class. Use set_error.
(symlink_info::check_shortcut): Ditto.
(symlink_info::set_error): New function.
(path_conv::check): Pass PC_NO_ACCESS_CHECK to symlink_info::check.
(symlink_info::check): Preserve PC_NO_ACCESS_CHECK in pflags. Use set_error.
throughout.
* path.cc (path_conv::check): Declare, set and use "strip_tail".
(path_conv::set_normalized_path): Add and use second argument, replacing all
tail stripping tests.
Corinna Vinschen
Christopher Faylor
Pierre Humblet