网络通讯select函数调用错误bad file descriptor怎么办 文章目录 1、网络基础 2、TCP3次握手-并发 3、TCP状态转换(select-poll) 3.3 recv/send wait等待 shutdown半关闭 8、查看网络的命令 9、设置端口复用 10、IO多路转接select\poll\epoll 11、内核大致1如何实现IO转接? 12、select工作流程 13、select,一个进程...
However, due to the bug, rpc.statd also closes the port that it first received frombindresvport(). When the program later attempts to use the closed port, it is invalid, andrpc.statdrepeatedly logs the 'select: Bad file descriptor' error. The bug is resolved in the upstream nfs-utils ...
At the first iteration is all ok, at the second the server gives me a bad file descriptor error when it executes the select again, I can not deal with it, can anyone help? Thanks! Place the server code: 1 2 3 4 5 6 7 8
Environments I encountered an error when using php-amqplib v2.9.1: stream_select(): unable to select [9]: Bad file descriptor (max_fd=484) OS: windows10 php: 5.6.9 php-amqplib: v2.9.1 It worked when I lowered the version to 2.7.0. help @ramunasd@lukebakken...
select是用于监视多个文件描述符状态的变化的。即用来监视文件描述符读/写/异常状态是否就绪。 函数原型:int select(int nfds,fd_set *readfds,fd_set *writefds,fd_set *exceptfds,struct timeval *timeout); select的几大缺点: (1)每次调用select,都需要把fd集合从用户态拷贝到内核态,这个开销在fd很多时会很...
== SOCKET_ERROR) { /* Bad error - this should not happen frequently */ /* Iterate over sockets and call select() on each separately */ FD_SET errreadfds, errwritefds, errexceptfds; readfds.fd_count = 0; writefds.fd_count = 0; ...
voidaddEntry(intindex,SelectionKeyImplski){putDescriptor(index,ski.channel.getFDVal());}voidputDescriptor(inti,intfd){pollArray.putInt(SIZE_POLLFD*i+FD_OFFSET,fd);} interestOps(ops)代码跟进,最终来到WindowsSelectorImpl的putEventOps中。 publicvoidputEventOps(SelectionKeyImplsk,intops){synchronized(clos...
Returns:countof ready descriptors,0 on timeout,1 onerror structpollfd{ intfd;/* file descriptor to check, or <0 to ignore */ shortevents;/* events of interest on fd */ shortrevents;/* events that occurred on fd */ }; 与select不同,poll不是为每个状态构造一个描述符集,而是构造一个pol...
fd_set *restrict errorfds, struct timeval *restrict timeout); 第一个缺点很明显, 就是性能 select系统调用会返回已就绪的socket数目,但elect不会告诉我们,是哪几个socket已经就绪,我们还需要从头遍历,这很浪费时间。除此之外遍历set大小并不取决于一创建socket个数,而是取决于已创建的socket中的最大的fd. manu...
1 int select(int fdsp1, fd_set *readfds, fd_set *writefds, fd_set *errorfds, const struct timeval *timeout); 各个参数含义如下: int fdsp1:最大描述符值 + 1 fd_set *readfds:对可读感兴趣的描述符集 fd_set *writefds:对可写感兴趣的描述符集 ...