New answers tagged c
In Ubuntu, lxc-dev contains the header files, so it's the starting point for writing code using the LXC libraries. Typically for Ubuntu, foo provides stuff that end-users expect, and foo-dev provides what developers need.
Sure, of course, since you can develop portable software that runs on both MacOS and Linux. Be sure to test it on Linux at regular intervals to make sure you haven't unintentionally added something unportable. If you want to use Linux-specific features then you will have more of a hard time. Depending on what it is you do, the program may compile on MacOS ...
You're leaving a zombie, trivially, because you didn't wait on your child process. Your shell is immediately exiting because you've set up its STDIN in a nonsensical way. pipe returns a one-way communications channel. You write to pipefd and read it back from pipefd. You did a buch of dup2 calls which lead the shell to attempt to read (STDIN) from the ...
You need to catch the SIGCHLD signal, and "reap" the zombie process with a wait() system call. Nearly minimal addition of code to your program to add a signal handler function, and set it as the SIGCHLD handler looks like this: #include <cstdio> #include <fcntl.h> #include <cstring> #include <stdlib.h> #include <cerrno> ...
From write(2), Errors ⋮ EAGAIN or EWOULDBLOCK The file descriptor fd refers to a socket and has been marked nonblocking (O_NONBLOCK), and the write would block. POSIX.1-2001 allows either error to be returned for this case, and does not require these constants to have the same value, so a portable application should check ...
A: Yes! Make sure that you look for the libraries inside your install, rather than the system's default area for libraries. The best example I can think to give of this is Dwarf Fortress's tar ball.
compile code using following command gcc filename.c -lpthread -lrt
Unix and C have an intertwined history, as they were both developed around the same time at Bell Labs in New Jersey and one of the major purposes of C was to implement Unix using a high level, architecture independent, portable language. However, there wasn't any official standardization until 1983. POSIX, the "portable operating system interface" is an ...
It is unfortunate that sun ever shipped /usr/ucb/cc; you would think it was compatible with SunOS 4; instead it compatible with some very old version of 4.2 but it also required the installation of the SunPro (Now Solaris Studio) compilers. These compilers can be downloaded from ...
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