The tcflush () function on SunOS and HP-UX

[Alex Vinokur]

Hi,

The same program was compiled on SunOS and HP-UX 10.
The program contains the tcflush (...) function.

But the results of the running on SunOS and HP-UX 10 are different.
The program works OK on SunOS,
but it seems it isn't OK on HP-UX 10.

Does anybody know what is wrong?

Thanks in advance,
Alex

//##########################################
//##### 1. Program #########################
//##########################################

#include <string>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <termios.h>
int main(void)
{
string s1;

while (1)
{
switch (tcflush(0, TCIFLUSH))
{
case 0 :
// OK
break;

case 1 :
cout << "FATAL ERROR : "
<< (strerror (errno))
<< endl;
exit (1);
break; // unused

default :
abort ();
break; // unused
} // switch (tcflush(0, TCIFLUSH))

cout << "Enter : ";
cin >> s1;
cout << "\tValue = " << s1 << endl;
sleep (5);
}
return 0;
}

//##########################################
//##### 2. SunOS ###########################
//##########################################
Compiler -> g++ -v : gcc version egcs-2.91.57 19980901
(egcs-1.1 release)
System -> uname -a : SunOS <nodename> 5.6 Generic_105181-09
sun4m sparc SUNW,SPARCstation-5

//=== Running ====
%a.out
Enter : aaaaa // aaaaa is input data
Value = aaaaa
bbbbb // bbbbb is input data
ccccc // ccccc is input data
Enter : ddddd // ddddd is input data
Value = ddddd
cntrl-c

//=== Conclusion ====
The data, received but not read, are flushed (bbbbb, ccccc)

//##########################################
//##### 3. HP-UX ###########################
//##########################################
Compiler -> g++ -v : gcc version 2.8.1
Compiler -> aCC : HP aC++ B3910B A.01.06
HP aC++ B3910B A.01.01 Support Library
Note! The same results were obtained using both g++ and aCC.

System -> uname -a : HP-UX <nodename> B.10.20 A
9000/847 1410304272 two-user license

//=== Running ====
%a.out
Enter : aaaaa // aaaaa is input data
Value = aaaaa
bbbbb // bbbbb is input data
ccccc // ccccc is input data
Enter : Value = bbbbb // ???
Enter : Value = ccccc // ???
Enter : ddddd // ddddd is input data
Value = ddddd
cntrl-c

//=== Conclusion ====
No data are flushed.

//##########################################
//##### END of INFORMATION #################
//##########################################

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