c - What is the purpose of fork()? - Stack Overflow
2009年6月12日 · fork() system call creates the exact duplicate of parent process, It makes the duplicate of parent stack, heap, initialized data, uninitialized data and share the code in read-only mode with parent process. Fork system call copies the memory on the copy-on-write basis, means child makes in virtual memory page when there is requirement of copying.
c - How does fork() work? - Stack Overflow
2015年12月19日 · Fork handlers may be established by means of the pthread_atfork() function in order to maintain application invariants across fork() calls. When the application calls fork() from a signal handler and any of the fork handlers registered by pthread_atfork() calls a function that is not async-signal-safe, the behavior is undefined.
What is the meaning of fork()&&fork()||fork() in c - Stack Overflow
2018年1月27日 · The original process calls fork unconditionally. Thus resulting in 2 processes. Each process from #1 calls the first fork in the logical expression. Each child thus created has a 0 returned, so it doesn't call the fork after the &&. The total number of processes is now 4. The two processes from #1 do call the fork after the &&. They create ...
c - What exactly does fork return? - Stack Overflow
2016年11月2日 · fork() is invoked in the parent process. Then a child process is spawned. By the time the child process spawns, fork() has finished its execution. At this point, fork() is ready to return, but it returns a different value depending on whether it's in the parent or child. In the child process, it returns 0, and in the parent process/thread, it ...
c - Differences between fork and exec - Stack Overflow
2009年10月31日 · The main difference between fork() and exec() is that, The fork() system call creates a clone of the currently running program. The original program continues execution with the next line of code after the fork() function call. The clone also starts execution at …
What does it mean to fork on GitHub? - Stack Overflow
A fork is a copy of a project folder (repository) into your github account or onto your desktop if you use Github on your Desktop. This allows you to freely experiment with changes without affecting the original project.
Library that has reference to fork() in C - Stack Overflow
2012年11月30日 · The C standard library (glibc) implements fork() which calls a UNIX/Linux-specific system call eventually to create a process, on Windows, you should use the winapi CreateProcess() see this example in MSDN. Note: Cygwin fork() is just a wrapper around CreateProcess() see How is fork() implemented?
linux - Why fork () works the way it does - Stack Overflow
2011年11月28日 · From there, fork() was an easy addition (27 assembly lines), reusing the rest of the code. In that stage of Unix development, executing a command became: Read a command line. fork() a child process, and wait for it (by sending a message to it). The child process loaded the command (overwriting the child's memory), and jumped to it.
git - GitHub: Why should I fork? - Stack Overflow
2015年7月3日 · That's where a fork comes into play. By forking someone else's repo, you get a copy to which you have write access, i.e. to which you can push your contributions. The entire workflow goes something like this: Identify an area in Alice's repo that can be improved. Fork that repo. Make a clone of your fork on your local machine.
What is the difference between fork () and vfork ()?
2010年11月23日 · From my man page (From POSIX.1) The vfork() function has the same effect as fork(2), except that the behavior is undefined if the process created by vfork() either modifies any data other than a variable of type pid_t used to store the return value from vfork(), or returns from the function in which vfork() was called, or calls any other function before successfully …