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  2. close (system call) - Wikipedia

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

    For most file systems, a program terminates access to a file in a filesystem using the close system call. This flushes file buffers, updates file metadata , which may include and end-of-file indicator in the data; de-allocates resources associated with the file (including the file descriptor ) and updates the system wide table of files in use.

  3. exec (system call) - Wikipedia

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

    The argument specifies the path name of the file to execute as the new process image. Arguments beginning at arg0 are pointers to arguments to be passed to the new process image. The argv value is an array of pointers to arguments. arg0. The first argument arg0 should be the name of the executable file.

  4. Task state segment - Wikipedia

    en.wikipedia.org/wiki/Task_state_segment

    The stack pointer addresses for each privilege level. Pointer Addresses for the Interrupt Stack Table (The inner-level stack pointer section above, discusses the need for this). Offset Address of the IO permission bitmap. Also, the task register is expanded in these modes to be able to hold a 64-bit base address.

  5. pushd and popd - Wikipedia

    en.wikipedia.org/wiki/Pushd_and_popd

    A representation of a stack. Elements are always 'pushed' to and 'popped' from the top. The directory stack underlies the functions of these two commands. It is an array of paths stored as an environment variable in the CLI, which can be viewed using the command dirs in Unix or Get-Location -stack in PowerShell.

  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. Unix domain socket - Wikipedia

    en.wikipedia.org/wiki/Unix_domain_socket

    Upon completion of the algorithm, the client executes exit() [5] and the server executes close(). [6] For a Unix domain socket, the socket's address is a /path/filename identifier. The server will create /path/filename on the filesystem to act as a lock file semaphore. No I/O occurs on this file when the client and server send messages to each ...

  8. Graceful exit - Wikipedia

    en.wikipedia.org/wiki/Graceful_exit

    The code associated with a graceful exit may also take additional steps, such as closing files, ... ("The file could not be read. Stack trace:"); ...

  9. procfs - Wikipedia

    en.wikipedia.org/wiki/Procfs

    The proc filesystem (procfs) is a special filesystem in Unix-like operating systems that presents information about processes and other system information in a hierarchical file-like structure, providing a more convenient and standardized method for dynamically accessing process data held in the kernel than traditional tracing methods or direct access to kernel memory.