linux – 如何找到unix socket连接的另一端?

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我有一个进程(dbus-daemon),它通过UNIX套接字有许多开放连接.其中一个连接是fd#36:
=$ps uw -p 23284
USER       PID %cpu %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
depesz   23284  0.0  0.0  24680  1772 ?        Ss   15:25   0:00 /bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session

=$ls -l /proc/23284/fd/36 
lrwx------ 1 depesz depesz 64 2011-03-28 15:32 /proc/23284/fd/36 -> socket:[1013410]

=$netstat -nxp | grep 1013410
(Not all processes could be identified,non-owned process info
 will not be shown,you would have to be root to see it all.)
unix  3      [ ]         STREAM     CONNECTED     1013410  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD

=$netstat -nxp | grep dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1013953  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1013825  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1013726  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1013471  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1013410  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1012325  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1012302  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1012289  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1012151  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011957  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011937  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011900  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011775  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011771  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011769  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011766  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011663  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011635  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011627  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011540  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011480  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011349  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011312  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011284  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011250  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011231  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011155  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011061  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011049  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011035  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1011013  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1010961  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD
unix  3      [ ]         STREAM     CONNECTED     1010945  23284/dbus-daemon   @/tmp/dbus-3XDU4PYEzD

基于数字连接,我假设dbus-daemon实际上是服务器.哪个好.但是如何找到连接到它的进程 – 使用dbus-launcher中第36个文件句柄的连接?在/ proc / net / unix上试过lsof甚至greps但是我找不到找到客户端进程的方法.

解决方法

最近我偶然发现了类似的问题.我很震惊地发现有些情况可能无法实现.我挖出了lsof(Vic Abell)创建者的评论,他指出这很大程度上取决于unix socket实现.有时套接字的所谓“端点”信息是可用的,有时则不然.不幸的是,他在Linux中指出这是不可能的.

On Linux,for example,where lsof must
use /proc/net/unix,all UNIX domain
sockets have a bound path,but no
endpoint information. Often there is
no bound path. That often makes it
impossible to determine the other
endpoint,but it is a result of the
Linux /proc file system
implementation.

如果你看看/ proc / net / unix,你可以亲眼看到,(至少在我的系统上)他是绝对正确的.我仍然感到震惊,因为我在跟踪服务器问题时发现这些功能至关重要.

原文链接:https://www.f2er.com/linux/402602.html

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