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These functions may be implemented as library routines in terms of fork, as is done in Linux, [12] or in terms of vfork for better performance, as is done in Solaris, [12] [13] but the POSIX specification notes that they were "designed as kernel operations", especially for operating systems running on constrained hardware and real-time systems.
fork() is the name of the system call that the parent process uses to "divide" itself ("fork") into two identical processes. After calling fork(), the created child process is an exact copy of the parent except for the return value of the fork() call. This includes open files, register state, and all memory allocations, which includes the ...
The death of the fork. This is by far the most common case. It is easy to declare a fork, but considerable effort to continue independent development and support. A re-merging of the fork (e.g., egcs becoming "blessed" as the new version of GNU Compiler Collection.) The death of the original (e.g. the X.Org Server succeeding and XFree86 dying.)
In 2012, the Gentoo Linux project created a fork of udev in order to avoid dependency on the systemd architecture. The resulting fork is called eudev and it makes udev functionality available without systemd. [122] A stated goal of the project is to keep eudev independent of any Linux distribution or init system. [123]
Copy-on-write (COW), also called implicit sharing [1] or shadowing, [2] is a resource-management technique [3] used in programming to manage shared data efficiently. Instead of copying data right away when multiple programs use it, the same data is shared between programs until one tries to modify it.
In parallel computing, the fork–join model is a way of setting up and executing parallel programs, such that execution branches off in parallel at designated points in the program, to "join" (merge) at a subsequent point and resume sequential execution.
The contents of the PEB are initialized by the NtCreateUserProcess system call, the Native API function that implements part of, and underpins, the Win32 CreateProcess (), CreateProcessAsUser (), CreateProcessWithTokenW (), and CreateProcessWithLogonW library functions that are in the kernel32.dll and advapi32.dll libraries as well as underpinning the fork() function in the Windows NT POSIX ...
Most Linux distributions are descended from other distributions, most being traceable back to Debian, Red Hat or Softlanding Linux System (see image right). Since most of the content of a distribution is free and open source software, ideas and software interchange freely as is useful to the individual distribution.