forked from Minki/linux
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
/*
|
|
* 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;
|
|
|
|
fd = os_open_file("/dev/ptmx", of_rdwr(OPENFLAGS()), 0);
|
|
if(fd < 0){
|
|
printk("get_pty : Couldn't open /dev/ptmx - err = %d\n", -fd);
|
|
return(fd);
|
|
}
|
|
|
|
info.fd = fd;
|
|
initial_thread_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:
|
|
*/
|