I have a C program that currently edits a single value in a parameter file by using sed through a system call. I’d like to change the program to use the C file libraries to edit this value, but the only way I know how to do this is by reading in the entire file, changing the value, and rewriting
Tag: c++
What type of memory objects does `shm_open` use?
Usually, shared memory is implemented using portions of On-Disk files mapped to processes address spaces. Whenever a memory access occurs on the shared region, the filesystem is involved to write changes on the disk which is a great overhead. Typically, a call to fopen() returns a file descriptor which is pas…
Makefile – wildcard and recipe build
I have the following makefile I got this message : make: Circular src/paquet/packet_implem.o <- src/paquet/packet_implem.o dependency dropped. gcc -std=c99 -Wall -Werror -Wshadow -Wextra -O2 -D_FORTIFY_SOURCE=2 -fstack-protector-all -lz -rdynamic -I/home/jy95/local/include -L/home/jy95/local/lib; /usr/lib…
SmtpClient.Send not working on linux environment
The following code, written in the .net core 2 environment, works in the windows environment but not in the linux environment. Exception: Failure sending mail. InnerExcepiton: StackTrace: Linux: Ubuntu 16.04.3 LTS This is a console app. Why is not working in linux environment? Answer I thought it was a code e…
Can boost lib built on windows with msvc be used in a linux program
I built boost from source on windows. I can compile with it on windows. When I want to compile with it in linux : Unable to find the requested Boost libraries. Boost version: 1.65.1 Boost include path: pathtoproject/deps/boost Could not find the following Boost libraries: No Boost libraries were found. You ma…
Unable to connect to any specified mysql C#
I can’t connect to my sql server, i tried some fixes from stackoverflow and google and it didn’t help me. Thanks. To configure myuser I used this on my linux vps. i tried : Unable to connect to any of the specified mysql hosts. C# MySQL ( i tried to use MySqlConnectionStringBuilder, don’t sp…
How can i give specific commands to programs via terminal Linux?
I’m seeking for a way to automatize the configuration of some tasks i do, but, i am having some trouble to give the order to the programs from the terminal. I have actually to give, every time i try to configure some Routers, the same commands always and always, but, i’m looking for a way to creat…
Get all mount points in kernel module
I’m trying to get all the mount points in a kernel module. Below is what I’ve come up with. It segfaults because of the strcat. Is this the correct way to get the mount points? Will this work? if so how do i fix the segfault? If not, how does one go about getting the mount points in a linux
g++ undefined reference error when linking to third party shared libraries
I’m trying to link a c++ program that uses several shared libraries from 3rd parties. Mainly, these libraries come from a github project called MBSim and I downloaded the latest daily build with all its binaries, libraries and headers, which I installed on /usr/local/mbsim-env. The most important librar…
How to ensure a posix c socket is still valid
I,m working on an embedded linux kernel 2.6 device and need to know if previously established socket is still valid or not,Also I can not do this with usual send function and check the returned value,because if I send to the invalid socket descriptor,my application will crash and linux will shut down my proce…