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New Message on cochindotnet
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From: dolly
Message 1 in Discussion
Hi , I have a program to which I want to be able to pipe to if required. 1)at the
command prompt when i say dir|myprog.exe , my program must read the stdin to get
output of dir. 2)if I say myprog.exe , my program should continue execution without
waiting for any input. I tried if(!cin.eof())
{
gets(buf);
cout<<"\nStdin = "<<stdin;
cout<<"\nCount="<<stdin->_cnt;
cout<<"\nstdin->_ptr = "<<stdin->_ptr;
} But this waits for an input because of the gets, so 1 works 2 doesn't So I tried
char buf[4000];
DWORD bytesRead;
HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
if(ReadFile(h,&buf,4000,&bytesRead,NULL)==0)
cout<<"\nError Reading stdin"<<GetLastError();
cout<<"\nstdin->_ptr = "<<stdin->_ptr; ReadFile here is also a blocking function,
hence 2 wont work. How can I check for data in stdin without blocking the process,
ie if there is data I proceed with it , else without it
Thanks, Dolly
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