linux/arch/um/os-Linux/tty.c
Jeff Dike edea138584 uml: tidy kern_util.h
Tidy kern_util.h.  It turns out that most of the function declarations
aren't used, so they can go away.  os.h no longer includes
kern_util.h, so files which got it through os.h now need to include it
directly.  A number of other files never needed it, so these includes
are deleted.

The structure which was used to pass signal handlers from the kernel
side to the userspace side is gone.  Instead, the handlers are
declared here, and used directly from libc code.  This allows
arch/um/os-Linux/trap.c to be deleted, with its remnants being moved
to arch/um/os-Linux/skas/trap.c.

arch/um/os-Linux/tty.c had its inclusions changed, and it needed some
style attention, so it got tidied.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:26 -08:00

63 lines
1.1 KiB
C

/*
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include "kern_constants.h"
#include "kern_util.h"
#include "os.h"
#include "user.h"
struct grantpt_info {
int fd;
int res;
int err;
};
static void grantpt_cb(void *arg)
{
struct grantpt_info *info = arg;
info->res = grantpt(info->fd);
info->err = errno;
}
int get_pty(void)
{
struct grantpt_info info;
int fd, err;
fd = open("/dev/ptmx", O_RDWR);
if (fd < 0) {
err = -errno;
printk(UM_KERN_ERR "get_pty : Couldn't open /dev/ptmx - "
"err = %d\n", errno);
return err;
}
info.fd = fd;
initial_thread_cb(grantpt_cb, &info);
if (info.res < 0) {
err = -info.err;
printk(UM_KERN_ERR "get_pty : Couldn't grant pty - "
"errno = %d\n", -info.err);
goto out;
}
if (unlockpt(fd) < 0) {
err = -errno;
printk(UM_KERN_ERR "get_pty : Couldn't unlock pty - "
"errno = %d\n", errno);
goto out;
}
return fd;
out:
close(fd);
return err;
}