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pipe

Version​

  • Linux v5.8.13

Abstract​

long sys_pipe(int __user *fildes);

Arguments​

Return​

Definitions​

sys_pipe()​

  • fs/pipe.c
SYSCALL_DEFINE1(pipe, int __user *, fildes)
{
	return do_pipe2(fildes, 0);
}

do_pipe2()​

  • fs/pipe.c
/*
 * sys_pipe() is the normal C calling standard for creating
 * a pipe. It's not the way Unix traditionally does this, though.
 */
static int do_pipe2(int __user *fildes, int flags)
{
	struct file *files[2];
	int fd[2];
	int error;

	error = __do_pipe_flags(fd, files, flags);
	if (!error) {
		if (unlikely(copy_to_user(fildes, fd, sizeof(fd)))) {
			fput(files[0]);
			fput(files[1]);
			put_unused_fd(fd[0]);
			put_unused_fd(fd[1]);
			error = -EFAULT;
		} else {
			fd_install(fd[0], files[0]);
			fd_install(fd[1], files[1]);
		}
	}
	return error;
}

Examples​