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
..
aarch64	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
alpha	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
arc	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
arm	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
bits	…
csky	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
generic	…
hppa	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
i386	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
ia64	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
include	…
m68k	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
microblaze	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
mips	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
net	…
netash	…
netatalk	…
netax25	…
neteconet	…
netinet	…
netipx	…
netiucv	…
netpacket	…
netrom	…
netrose	…
nfs	…
nios2	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
powerpc	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
riscv	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
s390	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
scsi	…
sh	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
sparc	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
sys	…
wordsize-64	…
x86	…
x86_64	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
Implies	…
Makefile	…
Versions	…
_G_config.h	…
_exit.c	…
a.out.h	…
accept.c	…
accept4.c	…
access.c	…
adjtime.c	…
adjtimex.c	…
aio_misc.h	…
aio_sigqueue.c	…
alphasort64.c	…
arch-fd_to_filename.h	…
arch-fork.h	…
bind.c	…
brk.c	…
check_native.c	…
check_pf.c	…
clock.c	…
clock_adjtime.c	…
clock_getcpuclockid.c	…
clock_getres.c	…
clock_gettime.c	…
clock_nanosleep.c	…
clock_settime.c	…
close.c	…
close_nocancel.c	…
closedir.c	…
closefrom.c	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
closefrom_fallback.c	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
cmsg_nxthdr.c	…
cnd_timedwait.c	…
configure	…
configure.ac	…
connect.c	…
convert_scm_timestamps.c	…
copy_file_range.c	…
creat.c	…
creat64.c	…
default-sched.h	…
device-nrs.h	…
dirfd.c	…
dirstream.h	…
dl-diagnostics-kernel.c	…
dl-execstack.c	…
dl-fxstatat64.c	…
dl-getcwd.c	…
dl-librecon.h	…
dl-openat64.c	…
dl-opendir.c	…
dl-origin.c	…
dl-osinfo.h	…
dl-sbrk.c	…
dl-sysdep.c	…
dl-sysdep.h	…
dl-vdso-setup.c	…
dl-vdso-setup.h	…
dl-vdso.h	…
dl-write.c	…
dl-writev.h	…
epoll_pwait.c	…
epoll_wait.c	…
errlist-compat.c	…
errlist-compat.h	…
errqueue.h	…
eventfd_read.c	…
eventfd_write.c	…
execveat.c	…
faccessat.c	…
fallocate.c	…
fallocate64.c	…
fatal-prepare.h	…
fchmodat.c	…
fcntl.c	…
fcntl64.c	…
fcntl_nocancel.c	…
fdatasync.c	…
fdopendir.c	…
features-time64.h	…
fexecve.c	…
filter-nr-syscalls.awk	…
fips-private.h	…
fixup-asm-unistd.h	…
fpathconf.c	…
fstat.c	…
fstat64.c	…
fstatat.c	…
fstatat64.c	…
fstatfs.c	…
fstatfs64.c	…
fstatvfs.c	…
fstatvfs64.c	…
fsync.c	…
ftime.c	…
ftruncate.c	…
ftruncate64.c	…
futimens.c	…
futimes.c	…
futimesat.c	…
fxstat.c	…
fxstat64.c	…
fxstatat.c	…
fxstatat64.c	…
gai_sigqueue.c	…
gen-syscall-h.awk	…
gentempfd.c	…
getclktck.c	…
getcpu.c	…
getcwd.c	…
getdents.c	…
getdents64.c	…
getdirentries.c	…
getdirentries64.c	…
getdtsz.c	…
getentropy.c	…
gethostid.c	…
getipv4sourcefilter.c	…
getitimer.c	…
getloadavg.c	…
getlogin.c	…
getlogin_r.c	…
getpagesize.c	…
getpeername.c	…
getpriority.c	…
getpt.c	…
getrandom.c	…
getrlimit.c	…
getrlimit64.c	…
getrusage.c	…
getsockname.c	…
getsockopt.c	…
getsourcefilter.c	…
getsourcefilter.h	…
getsysstats.c	…
gettimeofday.c	…
glibcsyscalls.py	…
glob-lstat-compat.c	…
glob.c	…
glob64-lstat-compat.c	…
glob64-time64.c	…
glob64.c	…
globfree.c	…
globfree64-time64.c	…
globfree64.c	…
grantpt.c	…
if_index.c	…
ifaddrs.c	…
ifreq.c	…
internal-signals.h	…
internal_statvfs.c	…
internal_statvfs.h	…
ipc_ops.h	…
ipc_priv.h	…
kernel-features.h	…
kernel-posix-cpu-timers.h	…
kernel-posix-timers.h	…
kernel_sigaction.h	…
kernel_stat.h	…
kernel_termios.h	…
kstat_cp.h	…
ldd-rewrite.sed	…
lddlibc4.c	…
ldsodefs.h	…
libc-vdso.h	…
libc_fatal.c	…
libc_sigaction.c	…
librt-compat.c	…
linux_fsinfo.h	…
listen.c	…
local-setxid.h	…
lseek.c	…
lseek64.c	…
lstat.c	…
lstat64.c	…
lutimes.c	…
lxstat.c	…
lxstat64.c	…
malloc-sysdep.h	…
mknodat.c	…
mlock2.c	…
mmap.c	…
mmap64.c	…
mmap_internal.h	…
mq_close.c	…
mq_getattr.c	…
mq_notify.c	…
mq_open.c	…
mq_receive.c	…
mq_send.c	…
mq_setattr.c	…
mq_timedreceive.c	…
mq_timedsend.c	…
mq_unlink.c	…
msgctl.c	…
msgget.c	…
msgrcv.c	…
msgsnd.c	…
msync.c	…
mtx_timedlock.c	…
nanosleep.c	…
netlink_assert_response.c	…
netlinkaccess.h	…
nice.c	…
not-cancel.h	…
not-errno.h	…
nscd_setup_thread.c	…
ntp_gettime.c	…
ntp_gettimex.c	…
olddirent.h	…
oldglob.c	…
open.c	…
open64.c	…
open64_nocancel.c	…
open_by_handle_at.c	…
open_nocancel.c	…
openat.c	…
openat64.c	…
openat64_nocancel.c	…
openat_nocancel.c	…
opendir.c	…
opensock.c	…
pathconf.c	…
pathconf.h	…
paths.h	…
pause.c	…
personality.c	…
pkey_get.c	…
pkey_mprotect.c	…
pkey_set.c	…
poll.c	…
posix_fadvise.c	…
posix_fadvise64.c	…
posix_fallocate.c	…
posix_fallocate64.c	…
posix_madvise.c	…
ppoll.c	…
prctl.c	…
pread.c	…
pread64.c	…
pread64_nocancel.c	…
preadv.c	…
preadv2.c	…
preadv64.c	…
preadv64v2.c	…
prlimit.c	…
process_vm_readv.c	…
process_vm_writev.c	…
prof-freq.c	…
profil-counter.h	…
profil.c	…
pselect.c	…
pselect32.c	…
ptrace.c	…
ptsname.c	…
pwrite.c	…
pwrite64.c	…
pwritev.c	…
pwritev2.c	…
pwritev64.c	…
pwritev64v2.c	…
read.c	…
read_nocancel.c	…
readahead.c	…
readdir.c	…
readdir64.c	…
readdir64_r.c	…
readdir_r.c	…
readonly-area.c	…
readv.c	…
reboot.c	…
recv.c	…
recvfrom.c	…
recvmmsg.c	…
recvmsg.c	…
remove.c	…
rename.c	…
renameat.c	…
renameat2.c	…
rewinddir.c	…
sa_len.c	…
safe-fatal.h	…
scandir64.c	…
sched_getaffinity.c	…
sched_getcpu.c	…
sched_rr_gi.c	…
sched_setaffinity.c	…
seekdir.c	…
segfault.c	…
select.c	…
semctl.c	…
semget.c	…
semop.c	…
semtimedop.c	…
send.c	…
sendmmsg.c	…
sendmsg.c	…
sendto.c	…
setegid.c	…
seteuid.c	…
setgid.c	…
setgroups.c	…
sethostid.c	…
setipv4sourcefilter.c	…
setitimer.c	…
setregid.c	…
setresgid.c	…
setresuid.c	…
setreuid.c	…
setrlimit.c	…
setrlimit64.c	…
setsockopt.c	…
setsourcefilter.c	…
settimeofday.c	…
settimezone.c	…
setuid.c	…
shlib-versions	…
shmat.c	…
shmctl.c	…
shmdt.c	…
shmget.c	…
shutdown.c	…
siglist-compat.c	…
signal.c	…
signalfd.c	…
sigpending.c	…
sigprocmask.c	…
sigqueue.c	…
sigreturn.c	…
sigset-cvt-mask.h	…
sigsetops.h	…
sigstack.c	…
sigsuspend.c	…
sigtimedwait.c	…
sigwait.c	…
sigwaitinfo.c	…
single-thread.h	…
sizes.h	…
socket-constants-time64.h	…
socket.c	…
socketcall.h	…
socketpair.c	…
spawn_int_def.h	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
spawni.c	posix: Add posix_spawn_file_actions_addclosefrom_np	2021-07-08 14:08:15 -03:00
speed.c	…
splice.c	…
stat.c	…
stat64.c	…
stat_t64_cp.c	…
stat_t64_cp.h	…
statfs.c	…
statfs64.c	…
statvfs.c	…
statvfs64.c	…
statx.c	…
statx_cp.c	…
statx_cp.h	…
struct_kernel_msqid64_ds.h	…
struct_kernel_semid64_ds.h	…
struct_kernel_shmid64_ds.h	…
struct_stat_time64.h	…
sync_file_range.c	…
syscall-names.list	…
syscalls.list	…
sysconf-sigstksz.h	…
sysconf.c	…
sysctl.c	…
sysdep-cancel.h	…
sysdep-vdso.h	…
sysdep.h	…
tcdrain.c	…
tcflow.c	…
tcflush.c	…
tcgetattr.c	…
tcgetpgrp.c	…
tcsendbrk.c	…
tcsetattr.c	…
tcsetpgrp.c	…
tee.c	…
telldir.c	…
termio.h	…
test-errno-linux.c	…
thrd_priv.h	…
thrd_sleep.c	…
time-clockid.h	…
time.c	…
timer_create.c	…
timer_delete.c	…
timer_getoverr.c	…
timer_gettime.c	…
timer_routines.c	…
timer_settime.c	…
timer_t_was_int_compat.h	…
timerfd_gettime.c	…
timerfd_settime.c	…
times.c	…
timespec_get.c	…
timespec_getres.c	…
tls-internal.c	…
tls-internal.h	…
truncate.c	…
truncate64.c	…
tst-adjtimex-time64.c	…
tst-adjtimex.c	…
tst-affinity-pid.c	…
tst-affinity-static.c	…
tst-affinity.c	…
tst-align-clone.c	…
tst-clock_adjtime-time64.c	…
tst-clock_adjtime.c	…
tst-clone.c	…
tst-clone2.c	…
tst-clone3.c	…
tst-close_range.c	…
tst-fallocate-common.c	…
tst-fallocate.c	…
tst-fallocate64.c	…
tst-fanotify.c	…
tst-getdents64.c	…
tst-getpid1.c	…
tst-gettid-kill.c	…
tst-gettid.c	…
tst-glibcsyscalls.py	…
tst-memfd_create.c	…
tst-misalign-clone.c	…
tst-mlock2.c	…
tst-mman-consts.py	…
tst-ntp_adjtime-time64.c	…
tst-ntp_adjtime.c	…
tst-ntp_gettime-time64.c	…
tst-ntp_gettime.c	…
tst-ntp_gettimex-time64.c	…
tst-ntp_gettimex.c	…
tst-o_path-locks.c	…
tst-ofdlocks-compat.c	…
tst-ofdlocks.c	…
tst-personality.c	…
tst-pkey.c	…
tst-ppoll-time64.c	…
tst-ppoll.c	…
tst-quota.c	…
tst-readdir64-compat.c	…
tst-rlimit-infinity.c	…
tst-sigcontext-get_pc.c	…
tst-signal-numbers.py	…
tst-sigtimedwait-time64.c	…
tst-sigtimedwait.c	…
tst-skeleton-affinity.c	…
tst-skeleton-thread-affinity.c	…
tst-socket-consts.py	…
tst-sync_file_range.c	…
tst-syscall-list.sh	…
tst-sysconf-iov_max-uapi.c	…
tst-sysconf-iov_max.c	…
tst-sysvmsg-linux.c	…
tst-sysvsem-linux.c	…
tst-sysvshm-linux.c	…
tst-tgkill.c	…
tst-timerfd-time64.c	…
tst-timerfd.c	…
tst-ttyname.c	…
ttyname.c	…
ttyname.h	…
ttyname_r.c	…
tv32-compat.h	…
ualarm.c	…
umount.c	…
umount2.c	…
unlockpt.c	…
update-syscall-lists.py	…
updwtmp.c	…
ustat.c	…
utime.c	…
utimensat.c	…
utimes.c	…
utmp_file.c	…
versionsort64.c	…
vfork.c	…
vmsplice.c	…
wait3.c	…
wait4.c	…
waitid.c	…
write.c	…
write_nocancel.c	…
writev.c	…
xmknod.c	…
xmknodat.c	…
xstat.c	…
xstat64.c	…
xstatconv.c	…
xstatconv.h	…
xstatover.h	…
xstatver.h	…