mayer@sun.com (Ronald &) (03/12/91)
On a sparcstation, SunOS 4.1 I am having a problem using the termio
ioctl TIOCSTI [simulate terminal input] when using gcc. While it
works as expected under cc, under gcc I get an "Inappropriate ioctl
for device" error message. Any ideas what I'm missing?
Ron Mayer
sun!sono!mayer mayer@sono.uucp
[A (short) example program and OS/system info follows:]
% cat ioc.c
/* This program works differently under gcc and cc. Why? */
#include <stdio.h>
#include <fcntl.h>
#include <sys/termios.h>
#include <errno.h>
main()
{
char a;
int fd=open("/dev/tty",O_RDWR);
int ioctl_return;
if (fd == -1) perror(NULL);
a='l';
ioctl(fd,TIOCSTI,&a); /* should send characters as if typed to the tty*/
a='s';
ioctl(fd,TIOCSTI,&a);
a='\n';
ioctl_return = ioctl(fd,TIOCSTI,&a);
if (ioctl_return == -1) perror(NULL);
}
%
% cc ioc.c
% a.out
ls
% ls [Note: The program "typed" this command]
a.out ice.lst ioc.c vhdl
%
%
% gcc ioc.c
% a.out
Inappropriate ioctl for device
%
%
%
% more /etc/motd
SunOS Release 4.1 (STANDALONE_1.2) #1: Wed Jul 25 00:05:22 PDT 1990
% arch -k
sun4c
%