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emacs/nt
Paul Eggert 707431575a FILE's lock is now always .#FILE and may be a regular file.
* etc/NEWS: Document this.
* nt/inc/unistd.h (O_NOFOLLOW): New macro.
* src/filelock.c: Include <c-ctype.h>.
(MAX_LFINFO): New top-level constant.
(lock_info_type): Remove members pid, boot_time.  Add members at,
dot, colon.  Change user member to be the entire buffer, not a
pointer.  This allows us to handle the case where a foreign
pid or boot time exceeds the local range.  All uses changed.
(LINKS_MIGHT_NOT_WORK): New constant.
(FREE_LOCK_INFO): Remove, as the pieces no longer need freeing.
(defined_WINDOWSNT): Remove.
(MAKE_LOCK_NAME, file_in_lock_file_name):
Always use .#FILE (not .#-FILE) for the file lock,
even if it is a regular file.
(rename_lock_file): New function.
(create_lock_file): Use it.
(create_lock_file, read_lock_data):
Prefer a symbolic link for the lock file, falling back on a
regular file if symlinks don't work.  Do not try to create
symlinks on MS-Windows, due to security hassles.  Stick with
POSIXish functions (open, read, write, close, fchmod, readlink, symlink,
link, rename, unlink, mkstemp) when creating locks, as a GNUish
host may be using a Windowsish file system, and cannot use
MS-Windows-only system calls.  Fall back on mktemp if mkstemp
doesn't work.  Don't fail merely because of a symlink-contents
length limit in the current file system; fall back on regular
files.  Increase the symlink contents length limit to 8 KiB, this
should be big enough for any real use and doesn't crunch the
stack.
(create_lock_file, lock_file_1, read_lock_data):
Simplify allocation of lock file buffers now that they fit in 8 KiB.
(lock_file_1): Return error number, not bool.  All callers changed.
(ELOOP): New macro, if not already defined.
(read_lock_data): Return size of lock file contents, not Lisp object.
All callers changed.  Handle a race condition if some other process
replaces a regular-file lock with a symlink lock or vice versa,
while we're trying to read the lock.
(current_lock_owner): Parse contents more carefully, to help avoid
confusing a regular-file lock with some other application's use
of the file.  Check for lock file contents being too long, or
not parsing correctly.
(current_lock_owner, lock_file):
Allow foreign pid and boot times that exceed the local range.
(current_lock_owner, lock_if_free, lock_file):
Simplify allocation of lock file contents.
* src/w32.c (sys_rename_replace): New function, containing most of
the contents of the old sys_rename.
(sys_rename): Use it.
(fchmod): New dummy function.
* src/w32.h (sys_rename_replace, fchmod): New decls.

Fixes: debbugs:13807
2013-03-05 14:35:41 -08:00
..
icons Add 2013 to yet more FSF copyright years 2013-01-02 17:46:47 -08:00
inc FILE's lock is now always .#FILE and may be a regular file. 2013-03-05 14:35:41 -08:00
.gitignore Nuke arch-tags. 2011-01-15 15:16:57 -08:00
addpm.c Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
addsection.c Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
ChangeLog FILE's lock is now always .#FILE and may be a regular file. 2013-03-05 14:35:41 -08:00
cmdproxy.c Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
config.nt nt/config.nt: Sync with autogen/config.in. 2013-03-04 18:14:08 +01:00
configure.bat Add 2013 to more copyright years 2013-01-02 17:35:49 -08:00
COPYING Change to GPLv3. 2007-07-25 07:00:38 +00:00
ddeclient.c Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
emacs-src.tags Support TAGS targets in the w32 build. 2010-10-01 13:45:16 +02:00
emacs-x64.manifest Support x64 build on MS-Windows with MSVC. 2012-09-30 23:36:42 +02:00
emacs-x86.manifest Support x64 build on MS-Windows with MSVC. 2012-09-30 23:36:42 +02:00
emacs.rc Bump version number to 24.2.93 2013-02-06 22:15:20 -08:00
emacsclient.rc Bump version number to 24.2.93 2013-02-06 22:15:20 -08:00
envadd.bat Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
ftime-nostartup.bat Nuke arch-tags. 2011-01-15 15:16:57 -08:00
ftime.bat Nuke arch-tags. 2011-01-15 15:16:57 -08:00
gmake.defs Merge from emacs-24; up to 2012-12-06T01:39:03Z!monnier@iro.umontreal.ca 2013-01-02 08:13:04 -08:00
INSTALL Update nt/INSTALL. 2013-02-02 10:23:52 +02:00
makefile.w32-in Bump version number to 24.2.93 2013-02-06 22:15:20 -08:00
multi-install-info.bat Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
nmake.defs Merge from emacs-24; up to 2012-12-06T01:39:03Z!monnier@iro.umontreal.ca 2013-01-02 08:13:04 -08:00
paths.h Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
preprep.c Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
README Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
README.W32 Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
runemacs.c Update copyright notices for 2013. 2013-01-01 09:11:05 +00:00
subdirs.el Add "no-byte-compile: t" local variable. 2007-01-30 10:09:53 +00:00
zipdist.bat Merge from emacs-24; up to 2012-12-06T01:39:03Z!monnier@iro.umontreal.ca 2013-01-02 08:13:04 -08:00

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	     Emacs for Windows NT/2000 and Windows 95/98/ME

  Copyright (C) 2001-2013 Free Software Foundation, Inc.
  See the end of the file for license conditions.

  This directory contains support for compiling and running GNU Emacs on
  Windows NT, Windows 95, and their successors.  This port supports all
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  + emacs.exe - The main Emacs executable. As this is designed to run
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