Adhemerval Zanella 882d6e17bc posix: Add posix_spawn_file_actions_addclosefrom_np ... This patch adds a way to close a range of file descriptors on posix_spawn as a new file action. The API is similar to the one provided by Solaris 11 [1], where the file action causes the all open file descriptors greater than or equal to input on to be closed when the new process is spawned. The function posix_spawn_file_actions_addclosefrom_np is safe to be implemented by iterating over /proc/self/fd, since the Linux spawni.c helper process does not use CLONE_FILES, so its has own file descriptor table and any failure (in /proc operation) aborts the process creation and returns an error to the caller. I am aware that this file action might be redundant to the current approach of POSIX in promoting O_CLOEXEC in more interfaces. However O_CLOEXEC is still not the default and for some specific usages, the caller needs to close all possible file descriptors to avoid them leaking. Some examples are CPython (discussed in BZ#10353) and OpenJDK jspawnhelper [2] (where OpenJDK spawns a helper process to exactly closes all file descriptors). Most likely any environment which calls functions that might open file descriptor under the hood and aim to use posix_spawn might face the same requirement. Checked on x86_64-linux-gnu and i686-linux-gnu on kernel 5.11 and 4.15. [1] https://docs.oracle.com/cd/E36784_01/html/E36874/posix-spawn-file-actions-addclosefrom-np-3c.html [2] https://github.com/openjdk/jdk/blob/master/src/java.base/unix/native/libjava/childproc.c#L82		2021-07-08 14:08:15 -03:00
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bits	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
sys	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
____longjmp_chk.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
__ia64_longjmp.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
__longjmp.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
__sigstack_longjmp.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
__start_context.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
arch-syscall.h	Update syscall lists for Linux 5.13	2021-07-01 17:37:36 +00:00
brk.c	ia64: Fix brk call on statup	2021-01-28 14:05:14 -03:00
bsd-_setjmp.S	ia64: relocate out of ports/ subdir	2014-02-16 01:12:38 -05:00
bsd-setjmp.S	ia64: relocate out of ports/ subdir	2014-02-16 01:12:38 -05:00
c++-types.data	IA64: Consolidate nptl/ subdirectories under linux/...	2014-08-04 10:00:52 -04:00
clone2.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
clone.S	ia64: relocate out of ports/ subdir	2014-02-16 01:12:38 -05:00
configure	Assume that accept4 is always available and works	2017-04-19 07:44:48 +02:00
configure.ac	Assume that accept4 is always available and works	2017-04-19 07:44:48 +02:00
dl-cache.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
dl-sysdep.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
getclktck.c	ia64: relocate out of ports/ subdir	2014-02-16 01:12:38 -05:00
getcontext.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
Implies	NPTL is no longer an add-on!	2014-07-07 09:29:06 -07:00
ioperm.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
jmp_buf-macros.h	Add jmp_buf-macros.h	2017-11-09 05:10:03 -08:00
kernel-features.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
ld.abilist	ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486]	2020-02-15 11:01:23 +01:00
ldconfig.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
ldd-rewrite.sed	ia64: relocate out of ports/ subdir	2014-02-16 01:12:38 -05:00
libanl.abilist	resolv: Move libanl into libc (if libpthread is in libc)	2021-07-02 11:45:00 +02:00
libBrokenLocale.abilist	Ignore absolute symbols in ABI tests.	2018-05-04 15:46:32 +00:00
libc.abilist	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
libcrypt.abilist	Ignore absolute symbols in ABI tests.	2018-05-04 15:46:32 +00:00
libdl.abilist	dlfcn: Move dlopen into libc	2021-06-03 08:26:04 +02:00
libm.abilist	Move __isnanf128 to libc.so	2021-03-30 14:58:19 +05:30
libnsl.abilist	Ignore absolute symbols in ABI tests.	2018-05-04 15:46:32 +00:00
libpthread.abilist	nptl: Remove remaining code from libpthread	2021-05-21 22:35:01 +02:00
libresolv.abilist	Ignore absolute symbols in ABI tests.	2018-05-04 15:46:32 +00:00
librt.abilist	Linux: Move timer_settime, __timer_settime64 from librt to libc	2021-06-28 09:51:01 +02:00
libthread_db.abilist	Ignore absolute symbols in ABI tests.	2018-05-04 15:46:32 +00:00
libutil.abilist	login: Move libutil into libc	2021-06-30 08:43:37 +02:00
localplt.data	ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486]	2020-02-15 11:01:23 +01:00
makecontext.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
Makefile	ia64: Remove _dl_var_init	2021-05-17 10:08:09 +02:00
mmap_internal.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
pipe.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
readelflib.c	ldconfig/x86: Store ISA level in cache and aux cache	2021-01-13 05:51:17 -08:00
register-dump.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
rt-sysdep.S	ia64: relocate out of ports/ subdir	2014-02-16 01:12:38 -05:00
setcontext.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
setjmp.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
shlib-versions	Remove configuration name patterns from shlib-versions.	2014-09-12 12:28:47 +00:00
sigaltstack-offsets.sym	ia64: relocate out of ports/ subdir	2014-02-16 01:12:38 -05:00
sigcontext-offsets.sym	Fix mcontext_t sigcontext namespace (bug 21457).	2017-08-30 22:02:04 +00:00
sigcontextinfo.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
swapcontext.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
syscall.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
syscalls.list	linux: Consolidate Linux setsockopt implementation	2021-07-06 11:45:35 -03:00
sysconf-sigstksz.h	sysconf: Add _SC_MINSIGSTKSZ/_SC_SIGSTKSZ [BZ #20305]	2021-02-01 11:00:52 -08:00
sysdep.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
sysdep.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
timer_t_was_int_compat.h	Linux: Define TIMER_T_WAS_INT_COMPAT in kernel-posix-timers.h	2021-06-28 09:51:00 +02:00
tst-setcontext2.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
tst-setcontext4.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
ucontext_i.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
unwind_longjmp.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
unwind-dw2-fde.c	ia64: relocate out of ports/ subdir	2014-02-16 01:12:38 -05:00
Versions	Linux: Move timer_settime, __timer_settime64 from librt to libc	2021-06-28 09:51:01 +02:00
vfork.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
wordexp.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
xstatver.h	Remove mknod wrapper functions, move them to symbols	2020-10-09 17:02:06 -03:00