I have a Python code like this. While the KeyboardInterrupt is handled fine if I run the python script by myself, it is not handled if I run it as another user using su, like this. How can I solve this problem? Answer The su command creates a new interactive shell and executes the command inside it. When you …
Tag: linux
Executing bash script via java in background after ssh connection is closed
I am using java to execute a simple bash script on a remote linux machine. The bash script named “shortoracle.bash” have this script: Simply speaking: create 10 parallel connection that execute queries for 360 seconds. From my java program i execute the following command: The ssh executes the scri…
Java wrapper for Unix file cmd [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations. Closed 3 years ago. Improve this ques…
Instaling yum with dependencies on an embedded Linux [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack …
How to compile / link / build a small sized Loadable Kernel Module ( LKM )?
I successfully built this trivial LKM with gcc but the resulting binary is of size 70kB. What CFLAGS and make arguments would you suggest to make it smaller? Answer The standard Linux kernel is compiled in an optimal way already unless it’s a debug version or some very specific options are turned on. So…
Is there a netfilter hook that has the receiving socket already associated?
The NF_INET_LOCAL_OUT hook has skb->sk pointing to a struct sock for the socket that sent the packet. If there a hook that has it set for the socket that receives the packet? In the NF_INET_LOCAL_IN hook, skb->sk is null. Will I have to use __inet_lookup_skb()? If so, what is the complexity of that func…
More explanation on `statfs64`
According to documentation, the structure fields explanation follows: Does “total file nodes in file system” mean how much existing files we have? Does it include directories and links? What does mean “free file nodes in fs”? What is f_spare? In some Linux forks (for example, in Androi…
Wait for signal from parent and does job and blocks again
Write a program that can display a text string (consisting only of the 26 alphabets and spaces). The program should fork 27 worker processes. Each worker process runs an infinite loop in which it waits for a signal from the controller (i.e., parent), sleeps for 1 sec, prints its pre-defined character, signals…
How to get Resident Set Size (RSS)
I need to know physical memory consumption of my Go process in Linux. What I need is Resident Set Size (RSS). runtime.ReadMemStats is not suitable because there is no way to get a size of a portion of a virtual memory that is resident. syscall.Getrusage is not suitable because it returns only Maxrss that is m…
get process inode using netlink
I want to try and correlate an IP packet (using libpcap) to a process. I have had some limited success using the relevant /proc/net/ files but found that on some of the machines i’m using, this file can be many thousands of lines and parsing it is not efficient (caching has alleviated some performance p…