blob: 64a5c21bda29ef99c8e667b74ca1d14ccc4e178c [file] [log] [blame]
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include <stdlib.h>
#include <errno.h>
#include "os.h"
#include "user.h"
#include "kern_util.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;
if((fd = os_open_file("/dev/ptmx", of_rdwr(OPENFLAGS()), 0)) < 0){
printk("get_pty : Couldn't open /dev/ptmx - errno = %d\n",
errno);
return(-1);
}
info.fd = fd;
tracing_cb(grantpt_cb, &info);
if(info.res < 0){
printk("get_pty : Couldn't grant pty - errno = %d\n",
info.err);
return(-1);
}
if(unlockpt(fd) < 0){
printk("get_pty : Couldn't unlock pty - errno = %d\n", errno);
return(-1);
}
return(fd);
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/