* or I/O error.*/} The code below passes an array of file descriptors over a UNIX domain socket using SCM_RIGHTS: structmsghdr msg = {0};structcmsghdr *cmsg;intmyfds[NUM_FD];/*Contains the file descriptors to p
Java的多线程问题 linux时间片一样 window优先级确定时间片多线程的开始,就是告诉cpu进入了就绪状态,cpu开始选择分配时间片,不是直接执行 同一时刻单个cpu之运行一个线程 1.这就是线程,线程之间的顺序不定,可能线程后面的语句(main函数的)先执行,,但是注意main函数的相对位置不变 1.单多线程哪个好? 线程并不是同...
Unofficial mirror of sourceware glibc repository. Updated daily. - Linux: Only generate 64 bit timestamps for 64 bit time_t recvmsg/recv… · bminor/glibc@948ce73
MSG_WAITALL (since Linux 2.2) This flag requests that the operation block until the full request is satisfied. However, the call may still return less data than requested if a signal is caught, an error or disconnect occurs, or the next data to be received is of a different type than ...
This code looksforthe IP_TTL optionina received ancillary buffer:structmsghdr msgh;structcmsghdr *cmsg;int*ttlptr;intreceived_ttl;/*Receive auxiliary data in msgh*/for(cmsg = CMSG_FIRSTHDR(&msgh); cmsg !=NULL; cmsg= CMSG_NXTHDR(&msgh,cmsg)) {if(cmsg->cmsg_level ==IPPROTO_IP&& cms...
As an example, Linux uses this ancillary data mechanism to pass extended errors, IP options, or file descriptors over UNIX domain sockets. The msg_flags field in the msghdr is set on return of recvmsg(). It can contain several flags: MSG_EOR indicates end-of-record; the data returned ...