From: Yeo Kai Wei <yeokaiwei@hotmail.com>
To: cygwin@cygwin.com
Subject: [FEEDBACK] Issue with fd_set, FD_ZERO, FD_SET, FD_SETSIZE : Cygwin
Date: Tue, 7 Feb 2023 04:25:22 +0800 [thread overview]
Message-ID: <PH0PR05MB991811F96A93962E56F6DCC0A4DA9@PH0PR05MB9918.namprd05.prod.outlook.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 2125 bytes --]
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
next reply other threads:[~2023-02-06 20:25 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-06 20:25 Yeo Kai Wei [this message]
2023-02-06 20:30 ` gs-cygwin.com
2023-02-06 20:33 ` Yeo Kai Wei
2023-02-06 20:59 ` gs-cygwin.com
2023-02-06 22:50 ` Yeo Kai Wei
2023-02-06 23:03 ` Yeo Kai Wei
2023-02-06 23:19 ` gs-cygwin.com
2023-02-06 23:27 ` Eliot Moss
2023-02-06 23:48 ` Yeo Kai Wei
2023-02-06 23:50 ` Eliot Moss
2023-02-06 23:53 ` Yeo Kai Wei
[not found] ` <PH0PR05MB9918F39B0B689DFF52980D11A4DB9@PH0PR05MB9918.namprd05.prod.outlook.com>
2023-02-07 1:53 ` Eliot Moss
2023-02-07 0:34 ` Yeo Kai Wei
2023-02-07 1:54 ` Eliot Moss
2023-02-07 3:15 ` Yeo Kai Wei
2023-02-07 3:56 ` Yeo Kai Wei
2023-02-07 4:44 ` Eliot Moss
2023-02-07 4:28 ` Yeo Kai Wei
2023-02-07 4:46 ` Eliot Moss
2023-02-07 5:21 ` Yeo Kai Wei
2023-02-07 5:51 ` Eliot Moss
2023-02-07 5:53 ` Brian Inglis
2023-02-07 6:59 ` Yeo Kai Wei
2023-02-07 8:43 ` Hans-Bernhard Bröker
2023-02-06 20:31 ` Eliot Moss
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