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      1 /*
      2  * Copyright 2007 The Android Open Source Project
      3  *
      4  * Console tty device.
      5  */
      6 #include "Common.h"
      7 
      8 #include <string.h>
      9 
     10 #include <sys/ioctl.h>
     11 #include <linux/vt.h>
     12 
     13 
     14 /*
     15  * Handle the various console ioctls, most of which we can just ignore.
     16  */
     17 static int ioctlConsoleTty(FakeDev* dev, int fd, int request, void* argp)
     18 {
     19     wsLog("%s: ioctl(0x%x, %p)\n", dev->debugName, request, argp);
     20     switch (request) {
     21     case VT_GETSTATE:       // struct vt_stat*
     22         /*
     23          * Looks like they want vs.v_active.  This just gets fed back into
     24          * another console ioctl, so we don't really need to do anything.
     25          * We zero out the struct so the data will at least appear to be
     26          * initialized.
     27          */
     28         memset(argp, 0, sizeof(struct vt_stat));
     29         break;
     30     case VT_OPENQRY:        // int*
     31         /* they want the console number */
     32         *(int*)argp = 123;
     33         break;
     34     default:
     35         /* ignore anything we don't understand */
     36         break;
     37     }
     38 
     39     return 0;
     40 }
     41 
     42 /*
     43  * Open the console TTY device, which responds to a collection of ioctl()s.
     44  */
     45 FakeDev* wsOpenDevConsoleTty(const char* pathName, int flags)
     46 {
     47     FakeDev* newDev = wsCreateFakeDev(pathName);
     48     if (newDev != NULL) {
     49         newDev->ioctl = ioctlConsoleTty;
     50     }
     51     return newDev;
     52 }
     53 
     54