JM プロジェクトは、主に Linux 関連のマニュアルページの日本語ページを翻訳・公開しています。
... can be considered as a container for two lists: • The interest list (sometimes also called the epoll set): the set of file descriptors that the process has registered an interest in monitoring. • The ready list: the set of file descriptors that are "ready" ... for I/O. The ready list is a subset of (or, more precisely, a set of references to) the file descriptors in the interest list. The ready list is dynamically populated by the kernel as a result of I/O activity on those file desc ... ターを返す。(もっと新しい epoll_create1 (2) では、 epoll_create (2) の機能が拡張されている)。 • Interest in particular file descriptors is then registered via epoll_ctl (2), which adds items to the interest list of the epoll instance. • epoll_wait (2) waits ... ... by the file descriptor epfd . The buffer pointed to by events is used to return information from the ready list about file descriptors in the interest list that have some events available. Up to maxevents are returned by epoll_wait (). The maxevents argumen ... スクリプターでイベントが発生すると、 epoll_wait () の呼び出しによる停止が解除されることになる。 If more than maxevents file descriptors are ready when epoll_wait () is called, then successive epoll_wait () calls will round robin through the set of ready file ... descriptors. This behavior helps avoid starvation scenarios, where a process fails to notice that additional file descriptors are read ... ... by the file descriptor epfd . The buffer pointed to by events is used to return information from the ready list about file descriptors in the interest list that have some events available. Up to maxevents are returned by epoll_wait (). The maxevents argumen ... スクリプターでイベントが発生すると、 epoll_wait () の呼び出しによる停止が解除されることになる。 If more than maxevents file descriptors are ready when epoll_wait () is called, then successive epoll_wait () calls will round robin through the set of ready file ... descriptors. This behavior helps avoid starvation scenarios, where a process fails to notice that additional file descriptors are read ... ... tmo_p , const sigset_t * sigmask ); 説明 poll () performs a similar task to select (2): it waits for one of a set of file descriptors to become ready to perform I/O. The Linux-specific epoll (7) API performs a similar task, but offers features beyond those ... o value (indicating an event or an error). A return value of zero indicates that the system call timed out before any file descriptors became read. On error, -1 is returned, and errno is set to indicate the cause of the error. エラー EFAULT fds points outsi ... 照のこと。 例 The program below opens each of the files named in its command-line arguments and monitors the resulting file descriptors for readiness to read ( POLLIN ). The program loops, repeatedly using poll () to monitor the file descriptors, printing th ... ... tmo_p , const sigset_t * sigmask ); 説明 poll () performs a similar task to select (2): it waits for one of a set of file descriptors to become ready to perform I/O. The Linux-specific epoll (7) API performs a similar task, but offers features beyond those ... o value (indicating an event or an error). A return value of zero indicates that the system call timed out before any file descriptors became read. On error, -1 is returned, and errno is set to indicate the cause of the error. エラー EFAULT fds points outsi ... 照のこと。 例 The program below opens each of the files named in its command-line arguments and monitors the resulting file descriptors for readiness to read ( POLLIN ). The program loops, repeatedly using poll () to monitor the file descriptors, printing th ... ... riptor into the file descriptor table of another process. If the buffer used to receive the ancillary data containing file descriptors is too small (or is absent), then the ancillary data is truncated (or discarded) and the excess file descriptors are autom ... atically closed in the receiving process. If the number of file descriptors received in the ancillary data would cause the process to exceed its RLIMIT_NOFILE resource limit (see getrlimit (2)), the ... excess file descriptors are automatically closed in the receiving process. The kernel constant SCM_MAX_FD defines a limit on the number of file de ... ... (): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L 説明 _exit () terminates the calling process "immediately". Any open file descriptors belonging to the process are closed. Any children of the process are inherited by init (1) (or by the nearest "subreaper" ... d with atexit (3) or on_exit (3). Open stdio (3) streams are not flushed. On the other hand, _exit () does close open file descriptors, and this may cause an unknown delay, waiting for pending output to finish. If the delay is undesired, it may be useful to ... ... (): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L 説明 _exit () terminates the calling process "immediately". Any open file descriptors belonging to the process are closed. Any children of the process are inherited by init (1) (or by the nearest "subreaper" ... d with atexit (3) or on_exit (3). Open stdio (3) streams are not flushed. On the other hand, _exit () does close open file descriptors, and this may cause an unknown delay, waiting for pending output to finish. If the delay is undesired, it may be useful to ... ... (): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L 説明 _exit () terminates the calling process "immediately". Any open file descriptors belonging to the process are closed. Any children of the process are inherited by init (1) (or by the nearest "subreaper" ... d with atexit (3) or on_exit (3). Open stdio (3) streams are not flushed. On the other hand, _exit () does close open file descriptors, and this may cause an unknown delay, waiting for pending output to finish. If the delay is undesired, it may be useful to ... ... using fcntl (2). O_NONBLOCK Set the O_NONBLOCK file status flag on the open file descriptions referred to by the new file descriptors. Using this flag saves extra calls to fcntl (2) to achieve the same result. 返り値 On success, zero is returned. On error, ... が無効な値である。 EINVAL ( pipe2 ()) flags に無効な値が入っている。 EMFILE The per-process limit on the number of open file descriptors has been reached. ENFILE オープンされているファイルの総数がシステム全体の制限に達している。 ENFILE The user hard limit on ... o implement the pipe () system call in a functional manner: the call doesn't take any arguments and returns a pair of file descriptors as the return value on success. The glibc pipe () wrapper function transparently deals with this. See syscall (2) for info ... 日本語の文書やマニュアルを配布している個人/プロジェクトへのリンクです。