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  2. exec (system call) - Wikipedia

    en.wikipedia.org/wiki/Exec_(system_call)

    The exec calls named ending with an e alter the environment for the new process image by passing a list of environment settings through the envp argument. This argument is an array of character pointers; each element (except for the final element) points to a null-terminated string defining an environment variable .

  3. fork (system call) - Wikipedia

    en.wikipedia.org/wiki/Fork_(system_call)

    For a process to start the execution of a different program, it first forks to create a copy of itself. Then, the copy, called the "child process", calls the exec system call to overlay itself with the other program: it ceases execution of its former program in favor of the other. The fork operation creates a separate address space for the ...

  4. Fork–exec - Wikipedia

    en.wikipedia.org/wiki/Fork–exec

    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 ...

  5. Child process - Wikipedia

    en.wikipedia.org/wiki/Child_process

    The wait system call is commonly invoked in the SIGCHLD handler. POSIX.1-2001 allows a parent process to elect for the kernel to automatically reap child processes that terminate by explicitly setting the disposition of SIGCHLD to SIG_IGN (although ignore is the default, automatic reaping only occurs if the disposition is set to ignore ...

  6. System call - Wikipedia

    en.wikipedia.org/wiki/System_call

    A high-level overview of the Linux kernel's system call interface, which handles communication between its various components and the userspace. In computing, a system call (commonly abbreviated to syscall) is the programmatic way in which a computer program requests a service from the operating system [a] on which it is executed.

  7. Category:System calls - Wikipedia

    en.wikipedia.org/wiki/Category:System_calls

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  8. Spawn (computing) - Wikipedia

    en.wikipedia.org/wiki/Spawn_(computing)

    The DOS/Windows spawn functions are inspired by Unix functions fork and exec; however, as these operating systems do not support fork, [2] the spawn function was supplied as a replacement for the fork-exec combination. However, the spawn function, although it deals adequately with the most common use cases, lacks the full power of fork-exec ...

  9. Callback (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Callback_(computer...

    Callbacks are often used to program the graphical user interface (GUI) of a program that runs in a windowing system. The application supplies a reference to a custom callback function for the windowing system to call. The windowing system calls this function to notify the application of events like mouse clicks and key presses.