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bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...示预期的进程号和进程名信息。
12. 内核结构跟踪
# m>cat m> path.bt
#include <linux/path.h>
#include <linux/dcache.h>
kprobe:vfs_open
{
printf("open path: %s\n", str(((struct path *)arg0)->dentry->d_name.name));
}
# bpftrace path.bt
Attaching 1 probe...
open path: dev...
Generate .pem file used to set up Apple Push Notifim>cat m>ions
I tried and tried to generate a .pem file, every time generating certifim>cat m>es from the client's account and then generating the .pem file using the terminal, but it's of no use. Can anyone give a step-by-step procedure?
...
How can I log the stdout of a process started by start-stop-daemon?
...
To expand on ypom>cat m>'s answer, since it won't let me comment:
start-stop-daemon --start --quiet --chuid $DAEMONUSER \
--make-pidfile --pidfile $PIDFILE --background \
--startas /bin/bash -- -c "exec $DAEMON $DAEMON_ARGS &gt; /var/...
How to pass command line argument to gnuplot?
...ilename='foo.data'" foo.plg
In foo.plg you can then use that variable
$ m>cat m> foo.plg
plot filename
pause -1
To make "foo.plg" a bit more generic, use a conditional:
if (!exists("filename")) filename='default.dat'
plot filename
pause -1
Note that -e has to precede the filename otherwise the f...
How do I find files with a path length greater than 260 characters in Windows?
...mit to displaying files that are only over a certain length (an easy modifim>cat m>ion to make), but displays them descending by length, so it's still super easy to see which paths are over your threshold. Here it is:
$pathToScan = "C:\Some Folder" # The path to scan and the the lengths for (sub-direct...
Can't connect to localhost on SQL Server Express 2012 / 2016
...not connect to localhost. I tried localhost\SQLExpress and Windows authentim>cat m>ion but it gives me an error message saying cannot connect. Am I missing something here? I've used SQL Server 2008 before and I've never had issues connecting to localhost. It seems that it can't even find it. Also in the ...
How to randomize (shuffle) a JavaScript array?
...
@nikola "not random at all" is a little strong a qualifim>cat m>ion for me. I would argue that it is sufficiently random unless you're a cryptographer, in which case you're probably not using Math.Random() in the first place.
– toon81
Apr 24 '13 a...
Check to see if python script is running
...le shell script to check it for you using the return code from ps.
ps up `m>cat m> /tmp/mydaemon.pid ` &gt;/dev/null &amp;&amp; echo "Running" || echo "Not running"
For extra credit, you can use the atexit module to ensure that your program cleans up its pidfile under any circumstances (when killed, e...
Download File Using Javascript/jQuery
...he server to set the file's MIME Type to a nonsensical value, such as applim>cat m>ion/x-please-download-me or alternatively applim>cat m>ion/octet-stream, which is used for arbitrary binary data.
If you only want to open it in a new tab, the only way to do this is for the user to a click on a link with its ...
Writing a dict to txt file and reading it back?
...gt; json.dump(d, open("text.txt",'w'))
This code dumps to a text file
$ m>cat m> text.txt
{"two": 2, "one": 1}
Also you can load from a JSON file:
&gt;&gt;&gt; d2 = json.load(open("text.txt"))
&gt;&gt;&gt; print d2
{u'two': 2, u'one': 1}
...