Adhemerval Zanella 607449506f io: Add closefrom [BZ #10353] ... The function closes all open file descriptors greater than or equal to input argument. Negative values are clamped to 0, i.e, it will close all file descriptors. As indicated by the bug report, this is a common symbol provided by different systems (Solaris, OpenBSD, NetBSD, FreeBSD) and, although its has inherent issues with not taking in consideration internal libc file descriptors (such as syslog), this is also a common feature used in multiple projects [1][2][3][4][5]. The Linux fallback implementation iterates over /proc and close all file descriptors sequentially. Although it was raised the questioning whether getdents on /proc/self/fd might return disjointed entries when file descriptor are closed; it does not seems the case on my testing on multiple kernel (v4.18, v5.4, v5.9) and the same strategy is used on different projects [1][2][3][5]. Also, the interface is set a fail-safe meaning that a failure in the fallback results in a process abort. Checked on x86_64-linux-gnu and i686-linux-gnu on kernel 5.11 and 4.15. [1] 5238e95759/src/basic/fd-util.c (L217) [2] ddf4b77e11/src/lxc/start.c (L236) [3] 9e4f2f3a6b/Modules/_posixsubprocess.c (L220) [4] 5f47c0613e/src/libstd/sys/unix/process2.rs (L303-L308) [5] https://github.com/openjdk/jdk/blob/master/src/java.base/unix/native/libjava/childproc.c#L82		2021-07-08 14:08:14 -03:00
..
be	io: Add closefrom [BZ #10353]	2021-07-08 14:08:14 -03:00
bits
le	io: Add closefrom [BZ #10353]	2021-07-08 14:08:14 -03:00
sys
____longjmp_chk.S	arm: Fix an incorrect check in ____longjmp_chk [BZ #27709]	2021-04-12 14:28:07 +01:00
aeabi_read_tp.S
arch-syscall.h	Update syscall lists for Linux 5.13	2021-07-01 17:37:36 +00:00
arm-features.h
atomic-machine.h
c++-types.data
clone.S	arm: align stack in clone [BZ 28020]	2021-06-28 11:35:44 +01:00
dl-cache.h
dl-machine.h
dl-procinfo.c
dl-procinfo.h
fixup-asm-unistd.h
getcontext.S
Implies
ioperm.c
jmp_buf-macros.h
kernel_stat.h	linux: Set default kernel_stat.h to LFS	2021-02-11 07:58:05 -03:00
kernel-features.h
ldconfig.h
ldsodefs.h
libc_sigaction.c	signal: Add __libc_sigaction	2021-03-18 15:54:39 -03:00
libc-do-syscall.S
localplt.data	nptl: Remove pthread raise implementation	2021-03-26 13:37:18 -03:00
makecontext.c
Makefile	nptl: Remove remaining code from libpthread	2021-05-21 22:35:01 +02:00
profil-counter.h
readelflib.c
register-dump.h
setcontext.S
shlib-versions
sigcontextinfo.h
sigrestorer.S
swapcontext.S
syscall.S
syscalls.list	linux: Consolidate Linux setsockopt implementation	2021-07-06 11:45:35 -03:00
sysdep.h
sysdep.S
time64-compat.h	y2038: Add support for 64-bit time on legacy ABIs	2021-06-15 10:42:11 -03:00
tls.h
ucontext_i.sym
Versions
vfork.S