I’m trying to execute the command “ls -l” but I’m not exactly sure how to approach it. This is what I’ve tried: However, the command doesn’t seem to work here. It works if I just simply use “ls” but I want to use “ls -l” is there another argument I h…
Tag: c++
Eclipse 3.8 won’t see gtkmm.h
I’m quite new to C++ and I aspire to learn gtkmm. I’m using linux mint 17.2 and Eclipse 3.8. When I enter:#include <gtkmm.h> the compiler will complain and give this error: I’ve used synaptic and installed libgtkmm-3.0-dev and when I search for the header file locate gtkmm.h I get back…
Get struct socket*, struct sock * from socket descriptor in a C program on Linux
I’m working on a C program on Linux (unprivileged). Is it possible to get a reference to struct socket or struct sock from the socket descriptor? Thank you. Answer If you’re working in user mode (eg. not kernel mode), you cannot directly manipulate kernel structures (including struct sock). If you…
How to catch new thread in gdb console mode?
I am running my Qt app from gdb, and i want to stop when new threads creates. (when gdb prints message [New Thread address (LPW number)]. I have set breakpoint b __pthread_create_2_1. That allows me to catch most of new threads prints. but i still got few new threads that are not catched. What else can i do t…
Unix pipe experiment hangs
The problem is that this program won’t output the expected START and END, also not exiting unless I kill it from shell. Answer You have the order of the dup2( existing_fd, new_fd ) parameters reversed. You have another bug that breaks lots of “let’s try out pipe(2)” experiments. You ar…
`boost::asio` `async_resolve` hangs on Linux, what may be a reason?
I write complex TCP/IP client application that generates a lot of outgoing TCP connections. I try to use boost::asio as portable TCP/IP networking implementation in C++. I found following issue. See the code: This code runs background thread to execute io_service::run method. It is supposed that we’ll h…
Read noonnamed pipe in terminal
Hellow. I have very simple C program. I create pipe in program (standard, non-named). Can I read pipe of existing process in terminal (stream with > or cat?). I try it but my command do nothing. Im know tkat i can create named pipe who is very easy for external I/O. I have number of pipe for /proc/number/f…
Read binary file,cannot execute binary file: Exec format error
My code When I compile with gcc gcc -c n1.c -o n1 and try to run it I got File m_6 and n1.c were executed on the same machine. How to solve this? Answer gcc -c compiles source files without linking. Cancel -c from from command.
What exactly does Valgrind take in to account when giving the number of allocations? [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 7 years ago. Improve this ques…
Looping C compilation and running through BASH
I’m trying to compile and run a C code while looping the input file through bash. Here is my code for the bash script I am using to automate it. So what I’m basically trying to do is compile filewithcode.c so that the executable is stored as compiler1, which takes outputnumber1 and readsfilename1.…