On Wed, Jan 16, 2002 at 04:49:06PM -0800, Matt Kraai wrote:
> Hmm. Would you run the ioctl Richard mentioned on /dev/console
> and see what it returns?
OK, here is some of dmesg
Kernel command line: root=/dev/sda1 ro console=ttyS0
Console: mono PROM 80x34
Calibrating delay loop... 719.25 BogoMIPS
ebus0: [auxio] [power] [SUNW,pll] [su] [su] [ecpp] [fdthree] [eeprom]
[flashprom] [watchdog] [display7seg] [beeper] [flashprom] [flashprom] [i2c -> (adc)
(gpio)
(gpio)] [i2c] [SUNW,lom]
PCIO serial driver version 1.54
su(serial) at 0x1fff13803f8 (tty 0 irq 10,7dc) is a 16550A
su(serial) at 0x1fff13602f8 (tty 1 irq 10,7d4) is a 16550A
VFS: Mounted root (ext2 filesystem) readonly.
Warning: unable to open an initial console.
Adding Swap: 51184k swap-space (priority -1)
eth5: Link is up using external transceiver at 100Mb/s, Full Duplex.
Don't know why i get the error about the console, there is a getty on
ttyS0
Here is my example program:
#include <stdio.h>
#include <fcntl.h>
#include <termios.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <linux/serial.h>
int main()
{
int fd;
struct serial_struct ser;
fd = open("/dev/console",O_RDONLY);
/* Are we on a serial console? */
if (ioctl(fd, TIOCGSERIAL, &ser) < 0)
/* Not on a serial console */
printf("Not on serial line.\n");
else {
/* Serial console on ttySx */
printf ("serial console found on line %d\n", ser.line);
}
}
# ./test
Not on serial line.
Changing the device to /dev/ttyS0 says serial console on line 0
I ran the same program on my alpha which also has a serial line and both
/dev/console and /dev/ttyS0 say yes there is a serial cosnole there.
So why is a ttya on a Netra T1 not a serial console, but is a serial console?
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Eye-Net Consulting http://www.eye-net.com.au/ <[EMAIL PROTECTED]>
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