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cdev: implement basic ioctl() stubs

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This commit adds stubs for every ioctl() that we need to support so an
xserver can run on this fake VT.
There are a lot more ioctl()s that can be invoked on TTYs and VTs, but we
currently do not intend to support these. If there is an application that
uses these and it makes sense to run it under kmscon, we will add the
needed ioctls.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This commit is contained in:
David Herrmann 2012-10-29 20:35:36 +01:00
parent b626a85206
commit dd2fea4f96
1 changed files with 156 additions and 0 deletions
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156
src/kmscon_cdev.c
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@ -31,9 +31,13 @@
#include <errno.h>
#include <fcntl.h>
#include <linux/kd.h>
#include <linux/vt.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <termio.h>
#include <termios.h>
#include <unistd.h>
#include "kmscon_cdev.h"
#include "kmscon_seat.h"
@ -511,6 +515,70 @@ static void ll_poll(fuse_req_t req, struct fuse_file_info *fi,
fuse_reply_poll(req, flags);
}
static void ioctl_TCFLSH(struct cdev_client *client, fuse_req_t req, int val)
{
switch (val) {
case TCIFLUSH:
shl_ring_flush(client->ring);
break;
case TCIOFLUSH:
shl_ring_flush(client->ring);
/* fallthrough */
case TCOFLUSH:
/* nothing to do; we have no output queue */
break;
default:
fuse_reply_err(req, EINVAL);
return;
}
fuse_reply_ioctl(req, 0, NULL, 0);
}
static bool ioctl_param(fuse_req_t req, void *arg, size_t in_want,
size_t in_have, size_t out_want, size_t out_have)
{
bool retry;
struct iovec in, out;
size_t in_num, out_num;
retry = false;
memset(&in, 0, sizeof(in));
in_num = 0;
memset(&out, 0, sizeof(out));
out_num = 0;
if (in_want) {
if (!in_have) {
retry = true;
} else if (in_have < in_want) {
fuse_reply_err(req, EFAULT);
return true;
}
in.iov_base = arg;
in.iov_len = in_want;
in_num = 1;
}
if (out_want) {
if (!out_have) {
retry = true;
} else if (out_have < out_want) {
fuse_reply_err(req, EFAULT);
return true;
}
out.iov_base = arg;
out.iov_len = out_want;
out_num = 1;
}
if (retry)
fuse_reply_ioctl_retry(req, in_num ? &in : NULL, in_num,
out_num ? &out : NULL, out_num);
return retry;
}
static void ll_ioctl(fuse_req_t req, int cmd, void *arg,
struct fuse_file_info *fi, unsigned int flags,
const void *in_buf, size_t in_bufsz, size_t out_bufsz)
@ -531,8 +599,96 @@ static void ll_ioctl(fuse_req_t req, int cmd, void *arg,
}
switch (cmd) {
case TCFLSH:
if (ioctl_param(req, arg, sizeof(int), in_bufsz, 0, out_bufsz))
return;
ioctl_TCFLSH(client, req, *(int*)in_buf);
break;
case VT_ACTIVATE:
if (ioctl_param(req, arg, sizeof(int), in_bufsz, 0, out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case VT_WAITACTIVE:
if (ioctl_param(req, arg, sizeof(int), in_bufsz, 0, out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case VT_GETSTATE:
if (ioctl_param(req, arg, 0, in_bufsz,
sizeof(struct vt_stat), out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case VT_OPENQRY:
if (ioctl_param(req, arg, 0, in_bufsz,
sizeof(int), out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case VT_GETMODE:
if (ioctl_param(req, arg, 0, in_bufsz,
sizeof(struct vt_mode), out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case VT_SETMODE:
if (ioctl_param(req, arg, sizeof(struct vt_mode), in_bufsz,
0, out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case KDGETMODE:
if (ioctl_param(req, arg, 0, in_bufsz,
sizeof(long), out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case KDSETMODE:
if (ioctl_param(req, arg, sizeof(long), in_bufsz,
0, out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case KDGKBMODE:
if (ioctl_param(req, arg, 0, in_bufsz,
sizeof(long), out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case KDSKBMODE:
if (ioctl_param(req, arg, sizeof(long), in_bufsz,
0, out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case TCGETS:
if (ioctl_param(req, arg, 0, in_bufsz,
sizeof(struct termios), out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case TCSETS:
if (ioctl_param(req, arg, sizeof(struct termios), in_bufsz,
0, out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case TCSETSW:
if (ioctl_param(req, arg, sizeof(struct termios), in_bufsz,
0, out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
case TCSETSF:
if (ioctl_param(req, arg, sizeof(struct termios), in_bufsz,
0, out_bufsz))
return;
fuse_reply_err(req, EOPNOTSUPP);
break;
default:
fuse_reply_err(req, EINVAL);
break;
}
}