diff options
| author | Paul Eggert <eggert@cs.ucla.edu> | 2013-07-07 11:00:14 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2013-07-07 11:00:14 -0700 |
| commit | 067428c1717acd28f205c2cff93f0583eb347f4c (patch) | |
| tree | 5937b119187f9900840e2c1174b408e86bb8d12b /nt/ChangeLog | |
| parent | 9aff9b3864085addb02b699f9648e547a8c00e54 (diff) | |
Make file descriptors close-on-exec when possible.
This simplifies Emacs a bit, since it no longer needs to worry
about closing file descriptors by hand in some cases.
It also fixes some unlikely races. Not all such races, as
libraries often open files internally without setting
close-on-exec, but it's an improvement.
* admin/merge-gnulib (GNULIB_MODULES): Add fcntl, pipe2.
(GNULIB_TOOL_FLAGS): Avoid binary-io, close. Do not avoid fcntl.
* configure.ac (mkostemp): New function to check for.
(PTY_OPEN): Pass O_CLOEXEC to posix_openpt.
* lib/fcntl.c, lib/getdtablesize.c, lib/pipe2.c, m4/fcntl.m4:
* m4/getdtablesize.m4, m4/pipe2.m4: New files, taken from gnulib.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* nt/gnulib.mk: Remove empty gl_GNULIB_ENABLED_verify section;
otherwise, gnulib-tool complains given close-on-exec changes.
* nt/inc/ms-w32.h (pipe): Remove.
* nt/mingw-cfg.site (ac_cv_func_fcntl, gl_cv_func_fcntl_f_dupfd_cloexec)
(gl_cv_func_fcntl_f_dupfd_works, ac_cv_func_pipe2): New vars.
* src/alloc.c (valid_pointer_p) [!WINDOWSNT]:
* src/callproc.c (Fcall_process) [!MSDOS]:
* src/emacs.c (main) [!DOS_NT]:
* src/nsterm.m (ns_term_init):
* src/process.c (create_process):
Use 'pipe2' with O_CLOEXEC instead of 'pipe'.
* src/emacs.c (Fcall_process_region) [HAVE_MKOSTEMP]:
* src/filelock.c (create_lock_file) [HAVE_MKOSTEMP]:
Prefer mkostemp with O_CLOEXEC to mkstemp.
* src/callproc.c (relocate_fd) [!WINDOWSNT]:
* src/emacs.c (main): Use F_DUPFD_CLOEXEC, not plain F_DUPFD.
No need to use fcntl (..., F_SETFD, FD_CLOEXEC), since we're
now using pipe2.
* src/filelock.c (create_lock_file) [! HAVE_MKOSTEMP]:
Make the resulting file descriptor close-on-exec.
* src/lisp.h, src/lread.c, src/process.c (close_load_descs, close_process_descs):
* src/lread.c (load_descriptor_list, load_descriptor_unwind):
Remove; no longer needed. All uses removed.
* src/process.c (SOCK_CLOEXEC): Define to 0 if not supplied by system.
(close_on_exec, accept4, process_socket) [!SOCK_CLOEXEC]:
New functions.
(socket) [!SOCK_CLOEXEC]: Supply a substitute.
(Fmake_network_process, Fnetwork_interface_list):
(Fnetwork_interface_info, server_accept_connection):
Make newly-created socket close-on-exec.
* src/sysdep.c (emacs_open, emacs_fopen):
Make new-created descriptor close-on-exec.
* src/w32.c (fcntl): Support F_DUPFD_CLOEXEC well enough for Emacs.
* src/w32.c, src/w32.h (pipe2): Rename from 'pipe', with new flags arg.
Fixes: debbugs:14803
Diffstat (limited to 'nt/ChangeLog')
| -rw-r--r-- | nt/ChangeLog | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/nt/ChangeLog b/nt/ChangeLog index 1a0746b318..a9b4f83664 100644 --- a/nt/ChangeLog +++ b/nt/ChangeLog @@ -1,3 +1,12 @@ +2013-07-07 Paul Eggert <eggert@cs.ucla.edu> + + Make file descriptors close-on-exec when possible (Bug#14803). + * gnulib.mk: Remove empty gl_GNULIB_ENABLED_verify section; + otherwise, gnulib-tool complains given close-on-exec changes. + * inc/ms-w32.h (pipe): Remove. + * mingw-cfg.site (ac_cv_func_fcntl, gl_cv_func_fcntl_f_dupfd_cloexec) + (gl_cv_func_fcntl_f_dupfd_works, ac_cv_func_pipe2): New vars. + 2013-06-25 Juanma Barranquero <lekktu@gmail.com> * configure.bat: Add warning to the help text about using the |