man 2 文檔

[root@ubuntu /arnold_test/20220324_hikflow_demo__socket_server_test]102# man -f shutdown shutdown (8) - Halt, power-off or reboot the machine shutdown (2) - shut down part of a full-duplex connection shutdown (3posix) - shut down socket send and receive operations SHUTDOWN(2) Linux Programmer's Manual SHUTDOWN(2)NAMEshutdown - shut down part of a full-duplex connectionSYNOPSIS#include <sys/socket.h>int shutdown(int sockfd, int how);DESCRIPTIONThe shutdown() call causes all or part of a full-duplex connection on the socket associated with sockfd to be shut down. If how is SHUT_RD, further recep‐tions will be disallowed. If how is SHUT_WR, further transmissions will be disallowed. If how is SHUT_RDWR, further receptions and transmissions will bedisallowed.//shutdown() 調用導致與 sockfd 關聯的套接字上的全雙工連接全部或部分關閉。 //如果 SHUT_RD 是怎樣的，則不允許進一步的接收。 //如果 SHUT_WR 怎樣，則不允許進一步傳輸。 如果 SHUT_RDWR 怎么樣，將不允許進一步的接收和傳輸。RETURN VALUEOn success, zero is returned. On error, -1 is returned, and errno is set appropriately.ERRORSEBADF sockfd is not a valid descriptor.EINVAL An invalid value was specified in how (but see BUGS).ENOTCONNThe specified socket is not connected.ENOTSOCKThe file descriptor sockfd does not refer to a socket.CONFORMING TOPOSIX.1-2001, POSIX.1-2008, 4.4BSD (shutdown() first appeared in 4.2BSD).NOTESThe constants SHUT_RD, SHUT_WR, SHUT_RDWR have the value 0, 1, 2, respectively, and are defined in <sys/socket.h> since glibc-2.1.91.BUGSChecks for the validity of how are done in domain-specific code, and before Linux 3.7 not all domains performed these checks. Most notably, UNIX domainsockets simply ignored invalid values. This problem was fixed for UNIX domain sockets in Linux 3.7.SEE ALSOconnect(2), socket(2), socket(7)COLOPHONThis page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest versionof this page, can be found at http://www.kernel.org/doc/man-pages/.Linux 2015-12-28 SHUTDOWN(2)

參考文章：socket–shutdown()函數

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