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  2. open (system call) - Wikipedia

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

    For most file systems, a program initializes access to a file in a file system using the open system call. This allocates resources associated to the file (the file descriptor), and returns a handle that the process will use to refer to that file. In some cases the open is performed by the first access.

  3. 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.

  4. Linux kernel interfaces - Wikipedia

    en.wikipedia.org/wiki/Linux_kernel_interfaces

    In the Linux kernel, various subsystems, such as the Direct Rendering Manager (DRM), define their own system calls, all of which are part of the system call interface. Various issues with the organization of the Linux kernel system calls are being publicly discussed. Issues have been pointed out by Andy Lutomirski, Michael Kerrisk and others.

  5. write (system call) - Wikipedia

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

    The write is one of the most basic routines provided by a Unix-like operating system kernel. It writes data from a buffer declared by the user to a given device, such as a file. This is the primary way to output data from a program by directly using a system call. The destination is identified by a numeric code.

  6. 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 .

  7. Category:System calls - Wikipedia

    en.wikipedia.org/wiki/Category:System_calls

    Pages in category "System calls" The following 24 pages are in this category, out of 24 total. This list may not reflect recent changes. ...

  8. fork (system call) - Wikipedia

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

    When a process calls fork, it is deemed the parent process and the newly created process is its child. After the fork, both processes not only run the same program, but they resume execution as though both had called the system call. They can then inspect the call's return value to determine their status, child or parent, and act accordingly.

  9. stat (system call) - Wikipedia

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

    stat() is a Unix system call that returns file attributes about an inode. The semantics of stat() vary between operating systems. As an example, Unix command ls uses this system call to retrieve information on files that includes: atime: time of last access (ls -lu) mtime: time of last modification (ls -l) ctime: time of last status change (ls -lc)