I have to modify a Makefile such that the intermediate files with extension .cc are moved to .cpp before building the .o. files. My modified Makefile looks like below. protoc is a compiler that generates .cc files. How to make targets so that after generating the .cc files those are move to .cpp and then the …
Tag: c++
C++ get source file directory in Linux
This question is many time asked and I referred all, but I need bit different. I am using macbook -> Clion (IDE) for C++ My program file location /Users/Kandarp/ClionProjects/SimulationParser/main.cpp When I use following function for get current directory it gives different file (I think actual path where…
C socket programming: Set ip header’s id to 0?
I want to send raw IP packets, which works perfectly fine, except for one field in the IP header. I need to set the IP id to 0. I tried it the following way: I then create a RAW_SOCKET with the IP_HDRINCL option set: I then create a buffer, containing my IP header, UDP header and the payload and send
What additional purpose can ai_protocol serve in hints while calling getaddrinfo() when ai_socktype is already specified?
The getaddrinfo accepts struct addrinfo *hints as the third argument which can be used to specify the criteria for selecting socket addresses to be returned by this function. The documentation says that we could set ai_socktype as well as ai_protocol to specify our selection criteria. However, I am unable to …
how to alternate continously Signal handler
I want to write a program in c for linux that catchs the first SIGUSR1 signal, ignores the second one and continue in this behaviour (catch-ignore) for the successive SIGUSR1 signals. I wonder how to keep alternating between the two handlers, because once i set the handler to SIG_IGN, the signal will be ignor…
Error “undefined reference to `cprintf”” during executing make command in qemu in linux kernel
(1) This is the main function (runproctest.c): (2) defs.h: (3) console.c (4) main.c (5) Here is my Makefile: and when I enter make qemu there is a problem: I don’t know why this happens.. Answer in the makefile, this line: should be: There may be other ld commands in the make file with similar problems.…
Windows 7/10 – Make Application launch on a different display
I am porting a Linux application to windows , there are two executable’s which need to be launched on primary and secondary displays respectively. In Linux its done through #!/bin/sh script,something like display_start_dualhead LVDS 800 480 DVI 1024 768 24 export screen_main=$LVDS export screen_secondar…
How can I build a standalone MQSeries client under Linux using the C API?
IBM offer an installable MQSeries Client software that allows you to access queue managers on remote hosts. They also offer some C-callable libraries that let you do messaging from a C application. My problem is that I don’t have admin access on the hosts I plan to test-deploy on, and getting an applica…
Catching SIGSEGV when triggered by corrupt stack
I’ve been working on some buggy code and wanted to install a SIGSEGV handler to get more information about the crash. However, I noticed that my handler is not invoked. I’ve been looking for a reason and it seems it has to do with a corrupt stack pointer value (it’s not getting masked for su…
2 program get same udp packets from a port
there is a server will send some UDP packets to my localhost, for example: if it send some UDP packets to my localhost and destination port is 5000. and there will have a client program to receive it on port 5000. but, what I want is to create another program, it will try to receive the same packets on port