On 7/2/2023 4:59 am, gs-cygwin....@gluelogic.com wrote:
On Tue, Feb 07, 2023 at 04:33:53AM +0800, Yeo Kai Wei wrote:
Hi All,
Thanks for the help.
I tried adding "#include <sys/select.h>".
However, this is the error message that was returned to me.
$ gcc -o selectStdIn selectStdIn.c
selectStdIn.c:9:10: fatal error: sys/select.h: No such file or directory
#include <sys/select.h>
Thank you.
On 7/2/2023 4:30 am,gs-cygwin....@gluelogic.com wrote:
On Tue, Feb 07, 2023 at 04:25:22AM +0800, Yeo Kai Wei via Cygwin wrote:
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
$ man select
#include <sys/select.h>
Please post at bottom of messages on this mailing list.
You need to install the cygwin-devel package to get <sys/select.h>
Cheers, Glenn
Hi All,
Thanks for the help.
Is this the correct link?
https://www.cygwin.com/packages/summary/cygwin-devel.html
I assume I should download the following
3.4.5-1 310 KiB 2023-01-19 19:25 [list of files
<https://www.cygwin.com/packages/x86_64/cygwin-devel/cygwin-devel-3.4.5-1>]
stable
Thank you very much.
Kind Regards,
YEO Kai Wei
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