Hi,
I would like to report an issue with Cygwin 3.4.2 on Windows.
It doesn't seem to be able to work with fd_set, FD_ZERO, FD_SET,
FD_SETSIZE macros.
The code is in italics. The filename was selectStdIn.c. The terminal
command used was "gcc -o selectStdIn selectStdIn.c"
Thank you.
/
/
/CODE
/
/#include <stdio.h>//
//#include <stdlib.h>//
//#include <sys/time.h>//
//#include <unistd.h>//
/ /
//void main()//
//{//
// fd_set fds; //set of file descriptors//
/ /
// struct timeval tv;//
/ /
// int flag;//
/ /
// char byte;//
/ /
// FD_ZERO(&fds);//
/ /
// FD_SET(0, &fds);//
/ /
// tv.tv_sec = 5;//
/ /
// tv.tv_usec = 0;//
/ /
// flag = select(FD_SETSIZE, //
// &fds,//
// NULL,//
// NULL,//
// &tv);//
/ /
// if(-1 == flag)//
// perror("select error");//
// else if(flag)//
// {//
// read(0,&byte,1);//
/ /
// puts("data read");//
// }//
/ /
// if(flag)//
// printf("The byte value is %c\n", byte);//
////
//}/
TERMINAL COMMANDS
$ gcc -o selectStdIn selectStdIn.c
selectStdIn.c: In function 'main':
selectStdIn.c:8:2: error: unknown type name 'fd_set'; did you mean 'fpos_t'?
fd_set fds; //set of file descriptors
^~~~~~
fpos_t
selectStdIn.c:16:2: warning: implicit declaration of function 'FD_ZERO'
[-Wimpli
cit-function-declaration]
FD_ZERO(&fds);
^~~~~~~
selectStdIn.c:18:2: warning: implicit declaration of function 'FD_SET'
[-Wimplic
it-function-declaration]
FD_SET(0, &fds);
^~~~~~
selectStdIn.c:24:9: warning: implicit declaration of function 'select';
did you
mean 'sleep'? [-Wimplicit-function-declaration]
flag = select(FD_SETSIZE,
^~~~~~
sleep
selectStdIn.c:24:16: error: 'FD_SETSIZE' undeclared (first use in this
function)
flag = select(FD_SETSIZE,
^~~~~~~~~~
selectStdIn.c:24:16: note: each undeclared identifier is reported only
once for
each function it appears in
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