sys/src/cmd/vmx/9p.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <thread.h>
   4 #include <fcall.h>
   5 #include <9p.h>
   6 #include "dat.h"
   7 #include "fns.h"
   8
   9 extern int regsfd;
  10 char Egreg[] = "the front fell off";
  11
  12 enum {
  13         Qregs,
  14         Qmem,
  15         Qmax
  16 };
  17
  18 static Dir files[] = {
  19         [Qregs] {.name "regs", .mode 0440},
  20         [Qmem] {.name "mem", .mode 0440},
  21 };
  22
  23 void
  24 srvread(Req *r)
  25 {
  26         int rc;
  27
  28         switch((int)r->fid->qid.path){
  29         case Qregs:
  30                 rc = pread(regsfd, r->ofcall.data, r->ifcall.count, r->ifcall.offset);
  31                 if(rc < 0)
  32                         responderror(r);
  33                 else{
  34                         r->ofcall.count = rc;
  35                         respond(r, nil);
  36                 }
  37                 break;
  38         case Qmem:
  39                 r->ofcall.count = vmemread(r->ofcall.data, r->ifcall.count, r->ifcall.offset);
  40                 if(r->ofcall.count == 0)
  41                         respond(r, "fault");
  42                 else
  43                         respond(r, nil);
  44                 break;
  45         default:
  46                 respond(r, Egreg);
  47         }
  48 }
  49
  50 Srv vmxsrv = {
  51         .read srvread,
  52 };
  53
  54 void
  55 init9p(char *srvname)
  56 {
  57         char *uid;
  58         int i;
  59
  60         uid = getuser();
  61         vmxsrv.tree = alloctree(uid, uid, 0770, nil);
  62         for(i = 0; i < Qmax; i++)
  63                 createfile(vmxsrv.tree->root, files[i].name, uid, files[i].mode, nil);
  64         threadpostmountsrv(&vmxsrv, srvname, nil, 0);
  65 }