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emacs/m4
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Paul Eggert 9d626dffc6 Add 'nofollow' flag to set-file-modes etc. 
This avoids some race conditions (Bug#39683).  E.g., if some other
program changes a file to a symlink between the time Emacs creates
the file and the time it changes the file’s permissions, using the
new flag prevents Emacs from inadvertently changing the
permissions of a victim in some completely unrelated directory.
* admin/merge-gnulib (GNULIB_MODULES): Add fchmodat.
* doc/lispref/files.texi (Testing Accessibility, Changing Files):
* doc/lispref/os.texi (File Notifications):
* etc/NEWS:
Adjust documentation accordingly.
* lib/chmodat.c, lib/fchmodat.c, lib/lchmod.c, m4/fchmodat.m4:
* m4/lchmod.m4: New files, copied from Gnulib.
* lib/gnulib.mk.in: Regenerate.
* lisp/dired-aux.el (dired-do-chmod):
* lisp/doc-view.el (doc-view-make-safe-dir):
* lisp/emacs-lisp/autoload.el (autoload--save-buffer):
* lisp/emacs-lisp/bytecomp.el (byte-compile-file):
* lisp/eshell/em-pred.el (eshell-pred-file-mode):
* lisp/files.el (backup-buffer-copy, copy-directory):
* lisp/gnus/mail-source.el (mail-source-movemail):
* lisp/gnus/mm-decode.el (mm-display-external):
* lisp/gnus/nnmail.el (nnmail-write-region):
* lisp/net/tramp-adb.el (tramp-adb-handle-file-local-copy)
(tramp-adb-handle-write-region):
* lisp/net/tramp-sh.el (tramp-do-copy-or-rename-file-directly):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-handle-write-region):
* lisp/net/tramp.el (tramp-handle-write-region)
(tramp-make-tramp-temp-file):
* lisp/server.el (server-ensure-safe-dir):
* lisp/url/url-util.el (url-make-private-file):
When getting or setting file modes, avoid following symbolic links
when the file is not supposed to be a symbolic link.
* lisp/doc-view.el (doc-view-make-safe-dir):
Omit no-longer-needed separate symlink test.
* lisp/gnus/gnus-util.el (gnus-set-file-modes):
* lisp/net/tramp.el (tramp-handle-file-modes):
* lisp/net/tramp-gvfs.el (tramp-gvfs-handle-set-file-modes):
* src/fileio.c (symlink_nofollow_flag): New function.
(Ffile_modes, Fset_file_modes):
Support an optional FLAG arg.  All C callers changed.
* lisp/net/ange-ftp.el (ange-ftp-set-file-modes):
* lisp/net/tramp-adb.el (tramp-adb-handle-set-file-modes):
* lisp/net/tramp-sh.el (tramp-sh-handle-set-file-modes):
* lisp/net/tramp-smb.el (tramp-smb-handle-set-file-modes):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-handle-set-file-modes):
Accept an optional FLAG arg that is currently ignored,
and add a FIXME comment for it.
* m4/gnulib-comp.m4: Regenerate.
2020-02-23 16:45:50 -08:00
..
00gnulib.m4 Update from Gnulib 2020-01-18 20:55:09 -08:00
__inline.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
absolute-header.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
acl.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
alloca.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
builtin-expect.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
byteswap.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
canonicalize.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
clock_time.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
close-stream.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
copy-file-range.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
d-type.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
dirent_h.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
dirfd.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
double-slash-root.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
dup2.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
eealloc.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
environ.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
errno_h.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
euidaccess.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
execinfo.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
explicit_bzero.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
extensions.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
extern-inline.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
faccessat.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
fchmodat.m4 Add 'nofollow' flag to set-file-modes etc. 2020-02-23 16:45:50 -08:00
fcntl.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
fcntl_h.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
fdopendir.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
filemode.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
flexmember.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
fpending.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
fpieee.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
fstatat.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
fsusage.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
fsync.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
getdtablesize.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
getgroups.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
getloadavg.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
getopt.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
gettime.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
gettimeofday.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
glibc21.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
gnulib-common.m4 Update from Gnulib 2020-02-09 00:45:42 -08:00
gnulib-comp.m4 Add 'nofollow' flag to set-file-modes etc. 2020-02-23 16:45:50 -08:00
group-member.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
ieee754-h.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
include_next.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
inttypes.m4 Update from Gnulib 2020-02-23 01:27:19 -08:00
largefile.m4 Update from Gnulib 2020-02-22 10:33:45 -08:00
lchmod.m4 Add 'nofollow' flag to set-file-modes etc. 2020-02-23 16:45:50 -08:00
limits-h.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
localtime-buffer.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
lstat.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
malloca.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
manywarnings.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
mbstate_t.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
md5.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
memmem.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
mempcpy.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
memrchr.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
minmax.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
mkostemp.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
mktime.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
mode_t.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
multiarch.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
nocrash.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
nstrftime.m4 Update from Gnulib 2020-02-23 16:15:01 -08:00
off_t.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
open-cloexec.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
open-slash.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
open.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
pathmax.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
pipe2.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
pkg.m4 Merge from pkg-config 2018-02-11 13:10:41 -08:00
pselect.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
pthread_sigmask.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
readlink.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
readlinkat.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
regex.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
sha1.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
sha256.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
sha512.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
sig2str.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
signal_h.m4 Update from Gnulib 2020-02-23 01:27:19 -08:00
socklen.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
ssize_t.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
st_dm_mode.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
stat-time.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
std-gnu11.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
stdalign.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
stddef_h.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
stdint.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
stdio_h.m4 Update from Gnulib 2020-02-23 01:27:19 -08:00
stdlib_h.m4 Update from Gnulib 2020-02-23 01:27:19 -08:00
stpcpy.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
string_h.m4 Update from Gnulib 2020-02-23 01:27:19 -08:00
strnlen.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
strtoimax.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
strtoll.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
symlink.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
sys_select_h.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
sys_socket_h.m4 Update from Gnulib 2020-02-23 01:27:19 -08:00
sys_stat_h.m4 Update from Gnulib 2020-02-23 01:27:19 -08:00
sys_time_h.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
sys_types_h.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
tempname.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
time_h.m4 Update from Gnulib 2020-02-23 01:27:19 -08:00
time_r.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
time_rz.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
timegm.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
timer_time.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
timespec.m4 Update from gnulib 2019-12-31 19:11:56 -08:00
tm_gmtoff.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
unistd_h.m4 Update from Gnulib 2020-02-23 01:27:19 -08:00
unlocked-io.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
utimens.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
utimes.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
vararrays.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
warnings.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
wchar_t.m4 Update copyright year to 2020 2020-01-01 00:59:52 +00:00
zzgnulib.m4 Update from Gnulib 2020-01-18 20:55:09 -08:00