<div dir="ltr">doing a "strace ifconfig -a" and you can see the following in your stderr:<div><br></div><div><div>open("/proc/net/dev", O_RDONLY) = 6</div><div>open("/proc/net/if_inet6", O_RDONLY) = 6</div>
<div>open("/proc/net/if_inet6", O_RDONLY) = 6</div><div>open("/proc/net/if_inet6", O_RDONLY) = 6</div><div><br></div><div style>and see fd id is 6, you can also see the fd in your /proc/<pid>/fd:</div>
<div style><br></div><div style>ls -al /proc/<pid>fd for a particular process give:</div><div style><br></div><div style><div>>ls -al /proc/2187/fd</div><div>total 0</div><div><br></div><div>lr-x------ 1 xxx xxx 64 Dec 16 07:26 0 -> /dev/null<br>
</div><div>l-wx------ 1 xxx xxx 64 Dec 16 07:26 1 -> /dev/null</div><div>lrwx------ 1 xxx xxx 64 Dec 16 07:26 10 -> anon_inode:[eventfd]</div><div>lrwx------ 1 xxx xxx 64 Dec 16 07:26 11 -> /dev/dri/card0</div><div>
<br></div><div style>registration of /proc happened when /proc is being initialized and created:</div><div style><br></div><div style>fs/proc/root.c:proc_root_init()</div><div style><br></div><div style>and the function for network is proc_net_init() inside fs/proc/proc_net.c.</div>
<div><br></div></div><div class="gmail_extra"><div class="gmail_quote">On Sat, Dec 7, 2013 at 12:58 PM, Hatt Tom <span dir="ltr"><<a href="mailto:net.study.sea@gmail.com" target="_blank">net.study.sea@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">hi:<br>
<br>
Does the network relevent register on /proc fs ? when does it register ?<br>
<br>
which entry of /proc will be used by ifconfig" command ?<br>
<br>
<br>
Thanks!<br>
<span class=""><font color="#888888">--<br>
Best Regards!<br>
<br>
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</font></span></blockquote></div><br><br clear="all"><div><br></div>-- <br>Regards,<br>Peter Teoh
</div></div></div>