CVSROOT:        /cvs/src
Module name:    src
Branch:         cygwin-1_7_29-release-branchpoint
Changes by:     cori...@sourceware.org  2014-11-13 12:53:12

Modified files:
        winsup/cygwin  : ChangeLog Makefile.in autoload.cc common.din 
                         cygheap.cc cygheap.h cygtls.cc cygtls.h 
                         dcrt0.cc dir.cc dlfcn.cc dll_init.cc dtable.cc 
                         environ.cc exception.h exceptions.cc 
                         external.cc fcntl.cc fhandler.h 
                         fhandler_disk_file.cc fhandler_netdrive.cc 
                         fhandler_proc.cc fhandler_process.cc 
                         fhandler_socket.cc fhandler_tape.cc 
                         fhandler_tty.cc flock.cc gendef globals.cc 
                         kernel32.cc malloc.cc miscfuncs.cc mount.cc 
                         msg.cc net.cc ntdll.h ntea.cc path.cc path.h 
                         poll.cc posix.sgml posix_ipc.cc resource.cc 
                         security.cc select.cc sem.cc setlsapwd.cc 
                         shm.cc signal.cc spawn.cc string.h syscalls.cc 
                         thread.cc timer.cc times.cc tls_pbuf.cc 
                         tls_pbuf.h uinfo.cc uname.cc winlean.h winsup.h 
        winsup/cygwin/include/cygwin: time.h version.h 
        winsup/cygwin/include/sys: cygwin.h mount.h 
        winsup/cygwin/libc: bsdlib.cc rexec.cc 
        winsup/doc     : ChangeLog cygwinenv.xml new-features.xml 
        winsup/utils   : ChangeLog cygcheck.cc 
Added files:
        winsup/cygwin  : quotactl.cc 
        winsup/cygwin/include/sys: quota.h 
        winsup/cygwin/lib: atexit.c dso_handle.c 
        winsup/cygwin/release: 1.7.33 

Log message:
        2014-11-07  Corinna Vinschen  <cori...@vinschen.de>
        
        * dcrt0.cc (cygwin__cxa_atexit): Fetch correct DSO handle value
        by searching dll list.  Explain why.
        
        2014-11-06  Corinna Vinschen  <cori...@vinschen.de>
        
        * dcrt0.cc (cygwin_atexit): Change preceeding comment to reflect
        API version numbers.
        * external.cc (cygwin_internal): disable setting cxx_malloc on 64 bit.
        Add CW_FIXED_ATEXIT case.
        * include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
        * include/sys/cygwin.h (cygwin_getinfo_types): Add CW_FIXED_ATEXIT.
        * lib/atexit.c (atexit): Test running Cygwin version by checking
        return value of cygwin_internal (CW_FIXED_ATEXIT).
        
        2014-11-05  Corinna Vinschen  <cori...@vinschen.de>
        
        * lib/atexit.c (atexit): Check for being linked into the executable.
        If so, call __cxa_atexit with NULL DSO handle.  Explain why.
        * lib/dso_handle.c: New file providing fallback __dso_handle.
        
        2014-11-05  Corinna Vinschen  <cori...@vinschen.de>
        
        * Makefile.in (NEW_FUNCTIONS): Add atexit to be not exported.
        * lib/atexit.c (atexit): New, statically linkable version of atexit.
        * dcrt0.cc (cygwin_atexit): Add comment to mark this function as old
        entry point.  Indiscriminately check for DSO of function pointer for
        all functions, if checking for DSO of return address fails on x86_64.
        Change comment accordingly.
        
        2014-11-05  Corinna Vinschen  <cori...@vinschen.de>
        
        * Makefile.in (NEW_FUNCTIONS): Define target-independent.  Add target
        dependent stuff afterwards.  Globally define timezone and all xdr
        symbols as non-exported from libcygwin.a.
        
        2014-11-03  Corinna Vinschen  <cori...@vinschen.de>
        
        * cygheap.cc: Fix formatting.
        
        2014-10-29  Corinna Vinschen  <cori...@vinschen.de>
        
        * cygheap.cc (init_cygheap::init_installation_root): Create content of
        installation_dir as non-prefixed path, if possible.
        
        2014-10-29  Corinna Vinschen  <cori...@vinschen.de>
        
        * common.din (__cxa_atexit): Define as cygwin__cxa_atexit.
        * dcrt0.cc (cygwin__cxa_atexit): New function.  Explain what we do.
        
        2014-10-28  Corinna Vinschen  <cori...@vinschen.de>
        
        * globals.cc (dos_file_warning): Set to false by default.
        * path.cc (warn_msdos): Make static.  Drop test for dos_file_warning.
        (path_conv::check): Check for dos_file_warning here to avoid a function
        call in the default case.
        
        2014-10-27  Corinna Vinschen  <cori...@vinschen.de>
        
        * dcrt0.cc (cygwin_atexit): Add workaround for broken atexit calls
        in __gcc_register_frame of DLLs built with gcc-4.8.3-3.
        
        2014-10-27  Corinna Vinschen  <cori...@vinschen.de>
        
        * cygheap.cc (init_cygheap::init_installation_root): Set
        installation_dir_len.
        * cygheap.h (struct init_cygheap): Add installation_dir_len member.
        * environ.cc (win_env::add_cache): Use stpcpy for speed.
        (posify_maybe): Use tmp_pathbuf buffer instead of stack.
        (raise_envblock): New function to resize Windows environment block.
        (build_env): Fix indentation.  Call raise_envblock function.  Check if
        $PATH exists and is non-empty.  If not, add PATH variable with Cygwin
        installation directory as content to Windows environment.  Explain why.
        
        2014-10-24  Corinna Vinschen  <cori...@vinschen.de>
        
        * fhandler_proc.cc (format_proc_cygdrive): Fix symlink path if cygdrive
        is "/".
        
        2014-10-24  Corinna Vinschen  <cori...@vinschen.de>
        
        * gendef (sigdelayed): 64 bit only: Fix seh_pushreg statements in
        prologue.
        
        2014-10-22  Yaakov Selkowitz  <yselk...@redhat.com>
        
        * common.din (stime): Export.
        * times.cc (stime): New function.
        * include/cygwin/time.h (stime): Declare.
        * include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
        
        2014-10-20  Corinna Vinschen  <cori...@vinschen.de>
        
        * fhandler_serial.cc: Revert debug code accidentally checked in on
        2014-08-18.
        
        2014-10-20  Corinna Vinschen  <cori...@vinschen.de>
        
        * path.cc (symlink_info::check): Set error from status code if opening
        the parent directory failed, but keep special case for root dirs.
        
        2014-10-17  Corinna Vinschen  <cori...@vinschen.de>
        
        * cygheap.cc (init_cygheap::init_installation_root): Just memmove
        contents of installation_root instead of calling GetModuleFileNameW
        again.  Copy installation_root to installation_dir before stripping of
        "bin" dir.  Explain what we do.
        * cygheap.h (struct init_cygheap): Add installation_dir member.
        
        2014-10-17  Corinna Vinschen  <cori...@vinschen.de>
        
        * cygtls.h (__try): Define __l_endtry as block-local label in 32 bit
        case as well.
        
        2014-10-17  Corinna Vinschen  <cori...@vinschen.de>
        
        * Makefile.in (DLL_OFILES): Add quotactl.o.
        * common.din (quotactl): Export.
        * ntdll.h: Define FILE_FS_CONTROL_INFORMATION::FileSystemControlFlags
        flag values.
        (struct _FILE_FS_CONTROL_INFORMATION): Define.
        (struct _FILE_GET_QUOTA_INFORMATION): Define.
        (typedef struct _FILE_QUOTA_INFORMATION): Define.
        (NtQueryObject): Use PVOID rather than VOID*.
        (NtQueryVolumeInformationFile): Ditto.
        (NtQueryQuotaInformationFile): Declare.
        (NtSetQuotaInformationFile): Declare.
        (NtSetVolumeInformationFile): Declare.
        * quotactl.cc: New file implementing quotactl().
        * include/sys/mount.h (BLOCK_SIZE): Define.
        (BLOCK_SIZE_BITS): Define.
        * include/sys/quota.h: New header.
        * include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
        
        2014-10-16  Corinna Vinschen  <cori...@vinschen.de>
        
        * Makefile.in (DLL_OFILES): Rearrange with one file per line.
        
        2014-10-16  Corinna Vinschen  <cori...@vinschen.de>
        
        * fhandler_proc.cc (format_proc_partitions): Extend output to print
        the windows mount points the device is mounted on.
        
        2014-10-13  Corinna Vinschen  <cori...@vinschen.de>
        
        * net.cc (cygwin_setsockopt): Drop redundant test for AF_LOCAL and
        SOCK_STREAM in SO_PEERCRED case, as in the original patch.
        
        2014-10-12  Corinna Vinschen  <cori...@vinschen.de>
        
        * dlfcn.cc (gfpod_helper): Only check for POSIX dir separator, same as
        in get_full_path_of_dll.
        
        2014-10-12  Corinna Vinschen  <cori...@vinschen.de>
        
        * dlfcn.cc (set_dl_error): Drop useless __stdcall.
        (check_path_access): Ditto.  Drop FE_CWD from call to find_exec.
        (gfpod_helper): Call path_conv::check for all paths containing a dir
        separator to more closely follow the Linux search algorithm.
        (get_full_path_of_dll): Drop useless __stdcall.
        (dlopen): Simplify RTLD_NOLOAD case by calling GetModuleHandleEx
        instead of GetModuleHandle/LoadLibrary.
        
        2014-10-11  Christian Franke  <fra...@computer.org>
        
        Add setsockopt(sd, SOL_SOCKET, SO_PEERCRED, NULL, 0) to disable
        initial handshake on AF_LOCAL sockets.
        * fhandler.h (class fhandler_socket): Add no_getpeereid status flag.
        (fhandler_socket::af_local_set_no_getpeereid): New prototype.
        * fhandler_socket.cc (fhandler_socket::af_local_connect): Skip handshake
        if no_getpeereid is set.  Add debug output.
        (fhandler_socket::af_local_accept): Likewise.
        (fhandler_socket::af_local_set_no_getpeereid): New function.
        (fhandler_socket::af_local_copy): Copy no_getpeereid.
        (fhandler_socket::getpeereid): Fail if no_getpeereid is set.
        * net.cc (cygwin_setsockopt): Add SO_PEERCRED for AF_LOCAL/SOCK_STREAM
        sockets.  Add comment to explain why we need it.
        * include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
        
        2014-10-10  Corinna Vinschen  <cori...@vinschen.de>
        
        * dlfcn.cc (dlopen): Disable old 32 bit code on 64 bit.
        * dcrt0.cc (check_sanity_and_sync): Ditto.
        * dll_init.cc (dll_dllcrt0_1): Fix typo in comment.
        
        2014-10-08  Corinna Vinschen  <cori...@vinschen.de>
        
        * common.din (ffsl): Export.
        (ffsll): Export.
        * syscalls.cc (ffs): Implement using GCC intrinsic.
        (ffsl): Ditto.
        (ffsll): Ditto.
        * include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
        
        2014-10-08  Christian Franke  <fra...@computer.org>
        
        * syscalls.cc (ffs): Fix crash of ffs (0x80000000) on 64 bit.
        
        2014-10-08  Corinna Vinschen  <cori...@vinschen.de>
        
        * fhandler_process.cc (format_process_statm): Fix output of dirty
        pages.  Add linefeed.
        
        2014-09-05  Corinna Vinschen  <cori...@vinschen.de>
        
        * fhandler_proc.cc (proc_tab): Add entry for cygdrive symlink.
        (format_proc_cygdrive): New function to implement /proc/cygdrive.
        
        2014-09-05  Corinna Vinschen  <cori...@vinschen.de>
        
        * exception.h (class exception): Remove unnecessary #ifdef.
        
        2014-09-05  Corinna Vinschen  <cori...@vinschen.de>
        
        * winlean.h (DNLEN): Raise to 31.  Explain why.
        
        2014-08-28  Corinna Vinschen  <cori...@vinschen.de>
        
        * fhandler_disk_file.cc (fhandler_disk_file::fstatvfs): Try the
        FileFsSizeInformation information class on filesystems choking on
        FileFsFullSizeInformation (I see you Netapp!)
        
        2014-08-27  Corinna Vinschen  <cori...@vinschen.de>
        
        * fhandler.h (fhandler_pty_slave::fch_open_handles): Add bool parameter
        to declaration.
        * fhandler_tty.cc (fhandler_pty_slave::fch_open_handles): Add bool
        parameter "chown".  Only request WRITE_OWNER access when opening pty
        synchronization objects if "chown" is set.
        (fhandler_pty_slave::fchmod): Call fch_open_handles with new bool
        parameter set to false.
        (fhandler_pty_slave::fchown): Call fch_open_handles with new bool
        parameter set to true.
        * kernel32.cc (CreateFileMappingW): Fix default standard rights for
        file mappings from READ_CONTROL to STANDARD_RIGHTS_REQUIRED to allow
        changing the DACL (fixes "access denied" error in pinfo::set_acl).
        
        * fhandler_disk_file.cc (fhandler_base::fstat_helper): Change debug
        output to print mode bits in octal.
        * security.cc (alloc_sd): Ditto.
        (set_file_attribute): Ditto.
        
        2014-08-27  Corinna Vinschen  <cori...@vinschen.de>
        
        * ntea.cc (read_ea): Change left-over return to __leave.  Fix
        condition to close handle.  Call NtClose rather than CloseHandle.
        (write_ea): Fix condition to close handle.  Call NtClose rather than
        CloseHandle.
        * security.cc (get_file_sd): Call pc.init_reopen_attr if a valid
        incoming handle was given, pc.get_object_attr otherwise.
        (set_file_sd): Ditto.
        
        2014-08-26  Corinna Vinschen  <cori...@vinschen.de>
        
        * path.h (path_conv::init_reopen_attr): Change from void to returning
        POBJECT_ATTRIBUTES.  Take OBJECT_ATTRIBUTES reference as argument, not
        pointer.
        * fhandler_disk_file.cc: Throughout accommodate above change.
        * syscalls.cc: Ditto.
        * ntea.cc (read_ea): Don't set hdl to NULL if it's already NULL.  Set
        attr with pc.init_reopen_attr before trying to reopen file.
        (write_ea): Ditto.
        * security.cc (get_file_sd): Use pc.init_reopen_attr rather than
        pc.get_object_attr when trying to reopen file.
        (set_file_sd): Ditto.
        
        2014-08-25  Corinna Vinschen  <cori...@vinschen.de>
        
        * cygtls.cc (san::leave/x86_64): Implement.
        * cygtls.h (class tls_pathbuf): Move counter variables into a union.
        Add 64 bit element _counters covering both counter variables to
        optimize save and restore operations.
        (class san/x86_64): Only store single 64 bit value.
        (san::san/x86_64): Implement.
        (san::leave/x86_64): Only declare here, as returns_twice function.
        Explain why.
        (class san/i686): Change type of _c_cnt and _w_cnt to uint32_t.
        (__try/x86_64): Move definition of __sebastian after the first memory
        barrier.  Drop __sebastian.setup call.
        
        2014-08-25  Corinna Vinschen  <cori...@vinschen.de>
        
        * cygtls.cc (_cygtls::remove): Revert previous patch.
        *  cygtls.h (struct _local_storage): Move pathbufs back here.
        (class san/x86_64): Revert class.  Save and restore pathbufs counters
        only.
        (class san/i686): Revert saving and restoring pathbufs counters.
        (__try/x86_64): Add a san variable and call it's setup method.
        (__except/x86_64): Call san::leave to restore pathbufs counters.
        * gendef (_sigbe): Revert previous change.
        * thread.cc (verifyable_object_state): Remove gcc 4.7 workaround in
        forward declaration as well.
        * tls_pbuf.cc (tls_pbuf): Revert previous change.
        * tls_pbuf.h (class tmp_pathbuf): Accommodate reverting pathbufs to
        locals structure.
        * tlsoffsets.h: Regenerate.
        * tlsoffsets64.h: Regenerate.
        
        2014-08-21  Corinna Vinschen  <cori...@vinschen.de>
        
        * Throughout, use __try/__except/__endtry blocks, rather than myfault
        handler.
        * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs
        has been moved from _local_storage to _cygtls.
        * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage
        of counters.  Change type of counters to uint32_t for clarity.
        Remove _cygtls as friend class.
        (struct _local_storage): Move pathbufs from here...
        (struct _cygtls): ...to here, allowing to access it from _sigbe.
        (class san): Only define on 32 bit.  Remove errno, _c_cnt and _w_cnt
        members.
        (san::setup): Drop parameter.  Don't initialize removed members.
        (san::leave): Don't set removed members.
        (class myfault): Only define on 32 bit.
        (myfault::faulted): Only keep implementation not taking any parameter.
        Drop argument in call to sebastian.setup.
        (__try/__leave/__except/__endtry): Implement to support real SEH.  For
        now stick to SJLJ on 32 bit.
        * dcrt0.cc (dll_crt0_0): Drop 64 bit call to
        exception::install_myfault_handler.
        * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION
        as return type.
        (PDISPATCHER_CONTEXT): Define as void * on 32 bit.  Define as pointer
        to _DISPATCHER_CONTEXT on 64 bit.
        (class exception): Define separately for 32 and 64 bit.
        (exception::myfault): Add handler for myfault SEH handling on 64 bit.
        (exception::exception): Fix mangled method name to account for change
        in type of last parameter.
        (exception::install_myfault_handler): Remove.
        * exceptions.cc (exception::myfault_handle): Remove.
        (exception::myfault): New SEH handler for 64 bit.
        * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when
        returning to the caller.
        * ntdll.h: Move a comment to a better place.
        (struct _SCOPE_TABLE): Define on 64 bit.
        * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround.
        * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs.
        (tls_pathbuf::destroy): Change type of loop variables to uint32_t.
        * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to
        uint32_t.  Accommodate new place of pathbufs.
        * tlsoffsets.h: Regenerate.
        * tlsoffsets64.h: Regenerate.
        
        2014-08-21  Corinna Vinschen  <cori...@vinschen.de>
        
        * miscfuncs.cc (__import_address): Cover the first dereference to imp
        under the fault handler.
        
        2014-08-21  Corinna Vinschen  <cori...@vinschen.de>
        
        * net.cc (if_freenameindex): Don't catch a SEGV from free to fail
        loudly on double free.
        
        2014-08-21  Corinna Vinschen  <cori...@vinschen.de>
        
        * dir.cc (rmdir): Don't skip deleting fh in the ENOTEMPTY case.
        
        2014-08-20  Corinna Vinschen  <cori...@vinschen.de>
        
        * tls_pbuf.h (tmp_pathbuf::tmp_pathbuf): Convert to inline method.
        (tmp_pathbuf::~tmp_pathbuf): Ditto.
        * tls_pbuf.cc (tmp_pathbuf::tmp_pathbuf): Remove here.
        (tmp_pathbuf::~tmp_pathbuf): Ditto.
        
        2014-08-19  Corinna Vinschen  <cori...@vinschen.de>
        
        * dir.cc (dirfd): Per POSIX, return EINVAL on invalid directory stream.
        (telldir): Per POSIX, return -1 and set errno to EBADF, rather than
        just returning 0, on invalid directory stream.
        * signal.cc (sigwaitinfo): Return -1, not EFAULT, when SEGV was catched.
        
        2014-08-19  Corinna Vinschen  <cori...@vinschen.de>
        
        * autoload.cc: Replace WNet[...]A with WNet[...]W imports.
        * dcrt0.cc (initial_env): Drop strlwr calls.  Call strcasestr instead.
        * fhandler_netdrive.cc: Throughout, convert to calling WNet UNICODE
        functions.  Use tmp_pathbuf rather than alloca.  Replace call to
        strlwr with call to RtlDowncaseUnicodeString.
        
        2014-08-19  Corinna Vinschen  <cori...@vinschen.de>
        
        * fhandler.h (fhandler_serial::is_tty): Reinstantiate.
        
        2014-08-18  Corinna Vinschen  <cori...@vinschen.de>
        
        * miscfuncs.cc (strlwr): Rename from cygwin_strlwr.  Drop __stdcall
        decoration.
        (strupr): Rename from cygwin_strupr.  Drop __stdcall decoration.
        * string.h (strlwr): Remove override macro.  Simply declare.
        (strupr): Ditto.
        
        2014-08-18  Corinna Vinschen  <cori...@vinschen.de>
        
        * dtable.cc (dtable::init_std_file_from_handle): Mention that console
        handles are kernel objects since Windows 8.
        * fhandler.h (enum conn_state): Add "listener" state.
        (class fhandler_socket): Drop listener status flag.
        (fhandler_socket::lseek): Return -1 and errno ESPIPE.
        (fhandler_serial::lseek): Ditto.
        (fhandler_serial::is_tty): Remove.
        * fhandler_socket.cc (fhandler_socket::listen): Set connect_state to
        listener.  Add comment.
        (fhandler_socket::accept4): Explicitely check if the socket is listening
        and fail with EINVAL, if not.  Explain why we have to do that.
        (fhandler_socket::getpeereid): Drop now redundant test.
        
        2014-08-15  Corinna Vinschen  <cori...@vinschen.de>
        
        * winsup.h (_GNU_SOURCE): Define.  Explain why.
        
        2014-08-14  Corinna Vinschen  <cori...@vinschen.de>
        
        * dlmalloc.c: Remove unused file.
        * dlmalloc.h: Ditto.
        * malloc.cc: Update to Doug Lea's malloc version 2.8.6.
        
        2014-08-13  Corinna Vinschen  <cori...@vinschen.de>
        
        * include/cygwin/version.h (CYGWIN_VERSION_DLL_MINOR): Bump to 33.
        (CYGWIN_VERSION_API_MINOR): Bump to reflect intermediate 1.7.32 release.
        
        2014-07-21  Corinna Vinschen  <cori...@vinschen.de>
        
        * include/cygwin/version.h (CYGWIN_VERSION_DLL_MINOR): Bump to 32.
        
        2014-05-06  Corinna Vinschen  <cori...@vinschen.de>
        
        * winlean.h (PIPE_REJECT_REMOTE_CLIENTS): Drop temporary definition
        since Mingw64 catched up.
        (DNLEN): Redefine as 16.  Explain why.
        
        2014-03-06  Corinna Vinschen  <cori...@vinschen.de>
        
        * setlsapwd.cc (setlsapwd): Use RtlSecureZeroMemory to delete password
        from memory.
        
        2014-11-05  Corinna Vinschen  <cori...@vinschen.de>
        
        * new-features.xml (ov-new1.7.33): Document atexit.
        
        2014-10-28  Corinna Vinschen  <cori...@vinschen.de>
        
        * cygwinenv.xml: Change default setting of dosfilewarning.
        * new-features.xml (ov-new1.7.33): Document aforementioned change.
        
        2014-10-27  Corinna Vinschen  <cori...@vinschen.de>
        
        * new-features.xml (ov-new1.7.33): Document empty $PATH handling.
        
        2014-10-22  Corinna Vinschen  <cori...@vinschen.de>
        
        * posix.xml (std-gnu): Add ffsl, ffsll, quotactl.
        (std-notes): Add restrictions of quotactl.
        
        2014-10-22  Yaakov Selkowitz  <yselk...@redhat.com>
        
        * new-features.xml (ov-new1.7.33): Document stime.
        * posix.xml (std-deprec): Add stime.
        
        2014-10-22  Corinna Vinschen  <cori...@vinschen.de>
        
        * new-features.xml (ov-new1.7.33): s/Linux/glibc.
        
        2014-10-22  Corinna Vinschen  <cori...@vinschen.de>
        
        * new-features.xml (ov-new1.7.33): Update to current state.
        
        2014-08-13  Corinna Vinschen  <cori...@vinschen.de>
        
        * new-features.xml (ov-new1.7.33): Add new section.
        (ov-new1.7.32): Reflect intermediate 1.7.32 release.
        
        2014-10-21  Corinna Vinschen  <cori...@vinschen.de>
        
        * cygcheck.cc (CYGLSA64_DLL): Remove unused macro.
        (dump_sysinfo): If COMSPEC isn't set in the MSVCRT environment, set it.
        Explain why.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/quotactl.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=NONE&r2=1.1.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/ChangeLog.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.6314.2.55&r2=1.6314.2.56
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/Makefile.in.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.271&r2=1.271.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/autoload.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.222&r2=1.222.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/common.din.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.7.2.1&r2=1.7.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/cygheap.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.177.2.1&r2=1.177.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/cygheap.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.166&r2=1.166.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/cygtls.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.92&r2=1.92.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/cygtls.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.92.2.1&r2=1.92.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/dcrt0.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.452.2.4&r2=1.452.2.5
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/dir.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.136.2.1&r2=1.136.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/dlfcn.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.55&r2=1.55.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/dll_init.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.108.2.2&r2=1.108.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/dtable.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.277.2.1&r2=1.277.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/environ.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.209.2.2&r2=1.209.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/exception.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.10.2.5&r2=1.10.2.6
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/exceptions.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.432.2.8&r2=1.432.2.9
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/external.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.134.2.1&r2=1.134.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fcntl.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.39&r2=1.39.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.495.2.8&r2=1.495.2.9
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_disk_file.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.394.2.1&r2=1.394.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_netdrive.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.36&r2=1.36.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_proc.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.119.2.2&r2=1.119.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_process.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.124.2.1&r2=1.124.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_socket.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.302.2.4&r2=1.302.2.5
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_tape.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.95&r2=1.95.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_tty.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.287&r2=1.287.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/flock.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.58.2.2&r2=1.58.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/gendef.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.53.2.1&r2=1.53.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/globals.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.55&r2=1.55.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/kernel32.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.15&r2=1.15.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/malloc.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.11&r2=1.11.22.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/miscfuncs.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.100.2.1&r2=1.100.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/mount.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.103.2.1&r2=1.103.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/msg.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.13&r2=1.13.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/net.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.311.2.3&r2=1.311.2.4
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/ntdll.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.149&r2=1.149.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/ntea.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.28.2.2&r2=1.28.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/path.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.688.2.1&r2=1.688.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/path.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.181&r2=1.181.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/poll.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.57&r2=1.57.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/posix.sgml.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.87&r2=1.87.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/posix_ipc.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.34&r2=1.34.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/resource.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.39&r2=1.39.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/security.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.265&r2=1.265.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/select.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.220.2.1&r2=1.220.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/sem.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.14&r2=1.14.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/setlsapwd.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.6.2.2&r2=1.6.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/shm.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.40.2.1&r2=1.40.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/signal.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.120.2.1&r2=1.120.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/spawn.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.353.2.2&r2=1.353.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/string.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.18&r2=1.18.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/syscalls.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.659.2.4&r2=1.659.2.5
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/thread.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.287.2.3&r2=1.287.2.4
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/timer.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.33.2.1&r2=1.33.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/times.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.123&r2=1.123.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/tls_pbuf.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.7.4.1&r2=1.7.4.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/tls_pbuf.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.2.14.1&r2=1.2.14.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/uinfo.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.191&r2=1.191.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/uname.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.32&r2=1.32.4.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/winlean.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.13&r2=1.13.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/winsup.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.254&r2=1.254.4.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/include/cygwin/time.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.9&r2=1.9.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/include/cygwin/version.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.397.2.5&r2=1.397.2.6
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/include/sys/quota.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=NONE&r2=1.1.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/include/sys/cygwin.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.104.2.2&r2=1.104.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/include/sys/mount.h.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.17&r2=1.17.4.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/lib/atexit.c.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=NONE&r2=1.3.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/lib/dso_handle.c.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=NONE&r2=1.1.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/libc/bsdlib.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.18.2.1&r2=1.18.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/libc/rexec.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.7.2.1&r2=1.7.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/release/1.7.33.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=NONE&r2=1.18.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/doc/ChangeLog.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.470.2.5&r2=1.470.2.6
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/doc/cygwinenv.xml.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.4&r2=1.4.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/doc/new-features.xml.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.18.2.4&r2=1.18.2.5
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/utils/ChangeLog.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.619.2.3&r2=1.619.2.4
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/utils/cygcheck.cc.diff?cvsroot=src&only_with_tag=cygwin-1_7_29-release-branchpoint&r1=1.145&r2=1.145.2.1

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