Displaying 20 results from an estimated 1000 matches similar to: "[PATCH v2] launch: Close file descriptors after fork (RHBZ#1123007)."
2014 Jul 25
3
[PATCH] launch: Close file descriptors after fork (RHBZ#1123007).
This refactors existing code to close file descriptors in the recovery
process, and also adds code to close file descriptors between the
fork() and exec() of QEMU or User-Mode Linux.
The reason is to avoid leaking main process file descriptors where the
main process (or other libraries in the main process) are not setting
O_CLOEXEC at all or not setting it atomically. Python is a particular
2014 Jul 28
1
Re: [PATCH] launch: Close file descriptors after fork (RHBZ#1123007).
Hi Richard,
I see this patch is included into libguestfs >= 1.26.6 & libguestfs >=
1.27.24. I feel that version is too high. Now RHEL 7.0 runs
libguestfs-1.22.6, RHEL 6.6 alpha and 6.5 runs libguestfs-1.20.11. Is that
possible to backport this patch, in order to make this problem fixed in
RHEL 7.0, 6.6, and 6.5?
Thanks & Best Regards
Qin Zhao (赵钦)
China System and Technology Lab,
2013 Aug 09
4
[PATCH v2 0/4] Experimental User-Mode Linux backend.
v1 was here:
https://www.redhat.com/archives/libguestfs/2013-August/msg00005.html
This now works, to some extent. The main problem now is that devices
are named /dev/ubd[a-] which of course confuses everything. I'm
thinking it may be easier to add a udev rule to rename them.
Rich.
2013 Aug 09
5
[PATCH 0/4] Not quite working User-Mode Linux backend.
This is a User-Mode Linux backend for libguestfs. You can select it
by doing:
export LIBGUESTFS_BACKEND=uml
export LIBGUESTFS_QEMU=/path/to/vmlinux
Note we're reusing the 'qemu' variable in the handle for convenience.
QEmu is not involved when using the UML backend.
This almost works. UML itself crashes when the daemon tries to
connect to the serial port. I suspect it's
2015 Nov 09
6
[PATCH 0/5] build: Enable some more warnings.
Add some warnings. Well, the first patch is a miscellaneous
change, but patches 2-5 add some warnings.
Rich.
2017 Jun 10
1
[PATCH] lib: direct, uml: Unblock SIGTERM in the hypervisor and recovery processes (RHBZ#1460338).
If SIGTERM is blocked in the main program, then it ends up still being
blocked in the subprocess after we fork. This means that we cannot
kill qemu by sending SIGTERM to it. This commit fixes the problem by
unblocking SIGTERM unconditionally after fork.
Thanks: wtfuzz on IRC for reporting and analysis.
---
lib/launch-direct.c | 15 +++++++++++++++
lib/launch-uml.c | 11 +++++++++++
2 files
2013 Mar 07
4
[PATCH 0/4] Small refactorings of the protocol layer.
As the start of work to add remote support, I'm taking a close look at
the protocol layer in the library. These are some small cleanups.
Rich.
2023 Jul 11
1
[libguestfs PATCH] lib: remove guestfs_int_cmd_clear_close_files()
The last (only?) caller of guestfs_int_cmd_clear_close_files() disappeared
in commit e4c396888056 ("lib/info: Remove /dev/fd hacking and pass a true
filename to qemu-img info.", 2018-01-23), part of v1.37.36.
Simplify the code by removing guestfs_int_cmd_clear_close_files().
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---
lib/guestfs-internal.h | 1 -
lib/command.c
2013 Sep 06
1
[PATCH] arm: appliance: Add support for device trees (dtb's).
This is the libguestfs companion patch to:
https://www.redhat.com/archives/libguestfs/2013-September/msg00045.html
Rich.
2014 Jan 16
3
[PATCH 0/2] Don't use snapshot=on
QEMU upstream has broken snapshot=on ... again.
These two patches stop using it entirely. Instead we run
'qemu-img create' to create overlay disks as required.
Note that the libvirt and UML backends were already doing this: The
libvirt backend because <transient/> has never worked, and the UML
backend was running uml_mkcow because the UML-equivalent syntax of
snapshot=on was
2012 Oct 18
10
[PATCH 0/10] Add a mini-library for running external commands.
Inspired by libvirt's virCommand* internal mini-library, this adds
some internal APIs for running commands.
The first patch contains the new APIs. The subsequent patches change
various parts of the library over to use it.
Rich.
2016 Apr 14
2
[PATCH] Add safe wrapper around waitpid which deals with EINTR correctly.
As Eric Blake noted in:
https://www.redhat.com/archives/libguestfs/2016-April/msg00154.html
libguestfs doesn't correctly handle the case where waitpid receives a
SIGCHLD signal and the main program has registered a non-restartable
signal handler.
In this case waitpid would return -EINTR and we would print an error,
but actually we should retry this case.
This adds two new internal functions,
2017 Oct 06
3
[PATCH v2 0/2] lib: Allow db_dump package to be a weak dependency
Previously posted:
https://www.redhat.com/archives/libguestfs/2017-October/msg00032.html
This takes a completely different approach. It turns out that POSIX /
the shell already defines a special exit code 127 for ‘command not
found’. We can make a small adjustment to lib/command.c to return
this exit code in that case.
Then we just have to modify the db_dump code to test for this exit
code.
I
2002 Aug 22
1
Applying the "Connection reset by peer"
Hi all,
we're suffering heavily from the "connection reset by peer" problem when
running Rsync on WinNT.
Great was our relief when seeing Randy's message in
http://www.mail-archive.com/rsync@lists.samba.org/msg01918.html
I immediately installed the full Cygwin to recompile Rsync, but since I'm
far from a C guru, I'm a bit puzzled with the last 2 lines in Randy's
2001 Oct 20
4
rsync on cygwin: Connection reset by peer
I have been trying to get rsync running correctly on cygwin for the past
couple of days. I found a post on the cygwin list that said there was a
bug in cygwin when using socketpair() but when I compiled the sample code:
(http://jrepp.com/rsync/socketpair.c) both ways it works fine. Here's the
article for reference:
http://sources.redhat.com/ml/cygwin/2001-08/msg00357.html
I am running the
2013 Jan 03
20
[PATCH] Switch to poll in xenconsoled's io loop.
The original implementation utilies select(). In Linux select() typically
supports up to 1024 file descriptors. This can be a problem when user tries to
boot up many guests. Switching to poll() has minimum impact on existing code
and has better scalibility.
Up to 8192 file descriptors are supported in the current implementation.
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
2001 Oct 31
2
suggested fix for the sigchld race
comments?
alternatives: sigsetjmp(ugly) and pselect(not portable, available)
drawback: additional filedescriptors.
Index: serverloop.c
===================================================================
RCS file: /home/markus/cvs/ssh/serverloop.c,v
retrieving revision 1.82
diff -u -r1.82 serverloop.c
--- serverloop.c 10 Oct 2001 22:18:47 -0000 1.82
+++ serverloop.c 11 Oct 2001 18:06:33 -0000
@@
2001 Jun 15
2
openssh 2.9p1: data loss when stdout sent to a pipe
We recently tried upgrading openssh from 2.5.2p2 to 2.9p1
and discovered that it no longer worked to feed the output from a remote
command into a pipe, unless the output was short and the pipe was very
fast at processing its input.
Example 1: ssh remote_machine some_command | less
(where "some_command" generates a lot of output) now fails after
the first screenful, with a
2012 Mar 09
1
[PATCH 1/2] Close all file descriptors in the recovery process.
From: "Richard W.M. Jones" <rjones at redhat.com>
If the parent process uses a pipe (or any fd, but pipes are a
particular problem), then the recovery process would hold open the
file descriptor(s) of the pipe, meaning that it could not be fully
closed in the parent. Because the recovery process doesn't use
exec(2), this wasn't avoidable even using FD_CLOEXEC.
Avoid this
2013 Feb 19
13
[PATCH] mini-os: implement poll(2)
It is just a wrapper around select(2).
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
extras/mini-os/include/posix/poll.h | 1 +
extras/mini-os/lib/sys.c | 90 ++++++++++++++++++++++++++++++++++-
2 files changed, 90 insertions(+), 1 deletion(-)
create mode 100644 extras/mini-os/include/posix/poll.h
diff --git a/extras/mini-os/include/posix/poll.h