ioctl problem in A/UX 2.0
Peter Espen pke@btr.com
pke at public.BTR.COM
Sat Mar 9 04:12:11 AEST 1991
Can someone explain to me why the first ioctl call in the following test
program fails with an invalid argument error?
I am running A/UX 2.0.
/***********************************************/
#define _SYSV_SOURCE
#include <stdio.h>
#include <termio.h>
#include <fcntl.h>
#include <sys/errno.h>
extern int errno;
int fp;
char *c_on = "TEST OUTPUT";
char *name = "/dev/tty0";
main ()
{
ttyout ( );
}
ttyout( )
{
int i, tt;
struct termio my_termio;
char *buf;
if ((fp = open( name, O_RDWR | O_NDELAY)) == NULL) {
printf("error opening /dev/tty0");
exit(0);
}
if ( (i = ioctl( fp, TCGETA, &my_termio)) < 0) {
perror("TCGETA:");
fprintf(stderr, "%d: ioctl error on TCGETA op. \n", errno);
exit(0);
}
my_termio.c_cflag |= B9600;
if ( (i = ioctl( fp, TCSETA, &my_termio)) < 0) {
fprintf(stderr, "ioctl error on TCSETA operation. \n");
exit(0);
}
buf = c_on;
if (fputs(buf, fp) == NULL)
fprintf(stderr, "can't fprintf to %s\n", name);
else
return;
close(fp);
}
/************************************************/
Thanks,
Peter Espen
pke at btr.com
peter at sophia.com
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