mdw@git.distorted.org.uk Git - adns/blob - regress/hplayback.c

   1 #include <assert.h>
   2 #include <string.h>
   3 #include <errno.h>
   4 #include <stdlib.h>
   5 #include <sys/types.h>
   6 #include <sys/socket.h>
   7 #include <netinet/in.h>
   8 #include <arpa/inet.h>
   9 #include <sys/time.h>
  10 #include <unistd.h>
  11 #include <fcntl.h>
  12 #include "harness.h"
  13 static FILE *Tinputfile, *Treportfile;
  14 static vbuf vb2;
  15 extern void Tshutdown(void) {
  16   adns__vbuf_free(&vb2);
  17 }
  18 static void Tensurereportfile(void) {
  19   const char *fdstr;
  20   int fd;
  21   if (Treportfile) return;
  22   Treportfile= stderr;
  23   fdstr= getenv("ADNS_TEST_REPORT_FD"); if (!fdstr) return;
  24   fd= atoi(fdstr);
  25   Treportfile= fdopen(fd,"a"); if (!Treportfile) Tfailed("fdopen ADNS_TEST_REPORT_FD");
  26 }
  27 static void Psyntax(const char *where) {
  28   fprintf(stderr,"adns test harness: syntax error in test log input file: %s\n",where);
  29   exit(-1);
  30 }
  31 static void Pcheckinput(void) {
  32   if (ferror(Tinputfile)) Tfailed("read test log input file");
  33   if (feof(Tinputfile)) Psyntax("eof at syscall reply");
  34 }
  35 void Tensurerecordfile(void) {
  36   const char *fdstr;
  37   int fd;
  38   int chars;
  39   unsigned long sec, usec;
  40   if (Tinputfile) return;
  41   Tinputfile= stdin;
  42   fdstr= getenv("ADNS_TEST_IN_FD");
  43   if (fdstr) {
  44     fd= atoi(fdstr);
  45     Tinputfile= fdopen(fd,"r"); if (!Tinputfile) Tfailed("fdopen ADNS_TEST_IN_FD");
  46   }
  47   setvbuf(Tinputfile,0,_IONBF,0);
  48   if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
  49   fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
  50   chars= -1;
  51   sscanf(vb2.buf," start %lu.%lu%n",&sec,&usec,&chars);
  52   if (chars==-1) Psyntax("start time invalid");
  53   currenttime.tv_sec= sec;
  54   currenttime.tv_usec= usec;
  55   if (vb2.buf[chars] != '\n') Psyntax("not newline after start time");
  56 }
  57 static void Parg(const char *argname) {
  58   int l;
  59   if (vb2.buf[vb2.used++] != ' ') Psyntax("not a space before argument");
  60   l= strlen(argname);
  61   if (memcmp(vb2.buf+vb2.used,argname,l)) Psyntax("argument name wrong");
  62   vb2.used+= l;
  63   if (vb2.buf[vb2.used++] != '=') Psyntax("not = after argument name");
  64 }
  65 static int Pstring_maybe(const char *string) {
  66   int l;
  67   l= strlen(string);
  68   if (memcmp(vb2.buf+vb2.used,string,l)) return 0;
  69   vb2.used+= l;
  70   return 1;
  71 }
  72 static void Pstring(const char *string, const char *emsg) {
  73   if (Pstring_maybe(string)) return;
  74   Psyntax(emsg);
  75 }
  76 static int Perrno(const char *stuff) {
  77   const struct Terrno *te;
  78   int r;
  79   char *ep;
  80   for (te= Terrnos; te->n && strcmp(te->n,stuff); te++);
  81   if (te->n) return te->v;
  82   r= strtoul(stuff+2,&ep,10);
  83   if (*ep) Psyntax("errno value not recognised, not numeric");
  84   return r;
  85 }
  86 static void P_updatetime(void) {
  87   int chars;
  88   unsigned long sec, usec;
  89   if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
  90   fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
  91   chars= -1;
  92   sscanf(vb2.buf," +%lu.%lu%n",&sec,&usec,&chars);
  93   if (chars==-1) Psyntax("update time invalid");
  94   currenttime.tv_sec+= sec;
  95   currenttime.tv_usec+= usec;
  96   if (currenttime.tv_usec > 1000000) {
  97     currenttime.tv_sec++;
  98     currenttime.tv_usec -= 1000000;
  99   }
 100   if (vb2.buf[chars] != '\n') Psyntax("not newline after update time");
 101 }
 102 static void Pfdset(fd_set *set, int max) {
 103   int r, c;
 104   char *ep;
 105   if (!set) {
 106     Pstring("null","null fdset pointer");
 107     return;
 108   }
 109   if (vb2.buf[vb2.used++] != '[') Psyntax("fd set start not [");
 110   FD_ZERO(set);
 111   if (vb2.buf[vb2.used] == ']') { vb2.used++; return; }
 112   for (;;) {
 113     r= strtoul(vb2.buf+vb2.used,&ep,10);
 114     if (r>=max) Psyntax("fd set member > max");
 115     if (ep == (char*)vb2.buf+vb2.used) Psyntax("empty entry in fd set");
 116     FD_SET(r,set);
 117     vb2.used= ep - (char*)vb2.buf;
 118     c= vb2.buf[vb2.used++];
 119     if (c == ']') break;
 120     if (c != ',') Psyntax("fd set separator not ,");
 121   }
 122 }
 123 #ifdef HAVE_POLL
 124 static int Ppollfdevents(void) {
 125   int events;
 126   if (Pstring_maybe("0")) return 0;
 127   events= 0;
 128   if (Pstring_maybe("POLLIN")) {
 129     events |= POLLIN;
 130     if (!Pstring_maybe("|")) return events;
 131   }
 132   if (Pstring_maybe("POLLOUT")) {
 133     events |= POLLOUT;
 134     if (!Pstring_maybe("|")) return events;
 135   }
 136   Pstring("POLLPRI","pollfdevents PRI?");
 137   return events;
 138 }
 139 static void Ppollfds(struct pollfd *fds, int nfds) {
 140   int i;
 141   char *ep;
 142   const char *comma= "";
 143   if (vb2.buf[vb2.used++] != '[') Psyntax("pollfds start not [");
 144   for (i=0; i<nfds; i++) {
 145     Pstring("{fd=","{fd= in pollfds");
 146     fds->fd= strtoul(vb2.buf+vb2.used,&ep,10);
 147     vb2.used= ep - (char*)vb2.buf;
 148     Pstring(", events=",", events= in pollfds");
 149     fds->events= Ppollfdevents();
 150     Pstring(", revents=",", revents= in pollfds");
 151     fds->revents= Ppollfdevents();
 152     Pstring("}","} in pollfds");
 153     Pstring(comma,"separator in pollfds");
 154     comma= ", ";
 155   }
 156   if (vb2.buf[vb2.used++] != ']') Psyntax("pollfds end not ]");
 157 }
 158 #endif
 159 static void Paddr(struct sockaddr *addr, int *lenr) {
 160   adns_rr_addr a;
 161   char *p, *q, *ep;
 162   int err;
 163   unsigned long ul;
 164   p= vb2.buf+vb2.used;
 165   if (*p!='[') {
 166     q= strchr(p,':');
 167     if (!q) Psyntax("missing :");
 168     *q++= 0;
 169   } else {
 170     p++;
 171     q= strchr(p,']');
 172     if (!q) Psyntax("missing ]");
 173     *q++= 0;
 174     if (*q!=':') Psyntax("expected : after ]");
 175     q++;
 176   }
 177   ul= strtoul(q,&ep,10);
 178   if (*ep && *ep != ' ') Psyntax("invalid port (bad syntax)");
 179   if (ul >= 65536) Psyntax("port too large");
 180   a.len= sizeof(a.addr);
 181   err= adns_text2addr(p, (int)ul, 0, &a.addr.sa,&a.len);
 182   if (err) Psyntax("invalid address");
 183   assert(*lenr >= a.len);
 184   memcpy(addr, &a.addr, a.len);
 185   *lenr= a.len;
 186   vb2.used= ep - (char*)vb2.buf;
 187 }
 188 static int Pbytes(byte *buf, int maxlen) {
 189   static const char hexdigits[]= "0123456789abcdef";
 190   int c, v, done;
 191   const char *pf;
 192   done= 0;
 193   for (;;) {
 194     c= getc(Tinputfile); Pcheckinput();
 195     if (c=='\n' || c==' ' || c=='\t') continue;
 196     if (c=='.') break;
 197     pf= strchr(hexdigits,c); if (!pf) Psyntax("invalid first hex digit");
 198     v= (pf-hexdigits)<<4;
 199     c= getc(Tinputfile); Pcheckinput();
 200     pf= strchr(hexdigits,c); if (!pf) Psyntax("invalid second hex digit");
 201     v |= (pf-hexdigits);
 202     if (maxlen<=0) Psyntax("buffer overflow in bytes");
 203     *buf++= v;
 204     maxlen--; done++;
 205   }
 206   for (;;) {
 207     c= getc(Tinputfile); Pcheckinput();
 208     if (c=='\n') return done;
 209   }
 210 }
 211 void Q_vb(void) {
 212   const char *nl;
 213   Tensurerecordfile();
 214   if (!adns__vbuf_ensure(&vb2,vb.used+2)) Tnomem();
 215   fread(vb2.buf,1,vb.used+2,Tinputfile);
 216   if (feof(Tinputfile)) {
 217     fprintf(stderr,"adns test harness: input ends prematurely; program did:\n %.*s\n",
 218            vb.used,vb.buf);
 219     exit(-1);
 220   }
 221   Pcheckinput();
 222   if (vb2.buf[0] != ' ') Psyntax("not space before call");
 223   if (memcmp(vb.buf,vb2.buf+1,vb.used) ||
 224       vb2.buf[vb.used+1] != '\n') {
 225     fprintf(stderr,
 226             "adns test harness: program did unexpected:\n %.*s\n"
 227             "was expecting:\n %.*s\n",
 228             vb.used,vb.buf, vb.used,vb2.buf+1);
 229     exit(1);
 230   }
 231   Tensurereportfile();
 232   nl= memchr(vb.buf,'\n',vb.used);
 233   fprintf(Treportfile," %.*s\n", (int)(nl ? nl - (const char*)vb.buf : vb.used), vb.buf);
 234 }
 235 int Hselect(    int max , fd_set *rfds , fd_set *wfds , fd_set *efds , struct timeval *to       ) {
 236  int r, amtread;
 237  char *ep;
 238  Qselect(       max , rfds , wfds , efds , to   );
 239  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 240  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 241  Tensurereportfile();
 242  fprintf(Treportfile,"%s",vb2.buf);
 243  amtread= strlen(vb2.buf);
 244  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 245   Psyntax("badly formed line");
 246  vb2.buf[amtread]= 0;
 247  if (memcmp(vb2.buf," select=",8)) Psyntax("syscall reply mismatch");
 248  if (vb2.buf[8] == 'E') {
 249   int e;
 250   e= Perrno(vb2.buf+8);
 251   P_updatetime();
 252   errno= e;
 253   return -1;
 254  }
 255   r= strtoul(vb2.buf+8,&ep,10);
 256   if (*ep && *ep!=' ') Psyntax("return value not E* or positive number");
 257   vb2.used= ep - (char*)vb2.buf;
 258         Parg("rfds"); Pfdset(rfds,max);
 259         Parg("wfds"); Pfdset(wfds,max);
 260         Parg("efds"); Pfdset(efds,max);
 261  assert(vb2.used <= amtread);
 262  if (vb2.used != amtread) Psyntax("junk at end of line");
 263  P_updatetime();
 264  return r;
 265 }
 266 #ifdef HAVE_POLL
 267 int Hpoll(      struct pollfd *fds , int nfds , int timeout     ) {
 268  int r, amtread;
 269  char *ep;
 270  Qpoll( fds , nfds , timeout    );
 271  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 272  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 273  Tensurereportfile();
 274  fprintf(Treportfile,"%s",vb2.buf);
 275  amtread= strlen(vb2.buf);
 276  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 277   Psyntax("badly formed line");
 278  vb2.buf[amtread]= 0;
 279  if (memcmp(vb2.buf," poll=",6)) Psyntax("syscall reply mismatch");
 280  if (vb2.buf[6] == 'E') {
 281   int e;
 282   e= Perrno(vb2.buf+6);
 283   P_updatetime();
 284   errno= e;
 285   return -1;
 286  }
 287   r= strtoul(vb2.buf+6,&ep,10);
 288   if (*ep && *ep!=' ') Psyntax("return value not E* or positive number");
 289   vb2.used= ep - (char*)vb2.buf;
 290         Parg("fds"); Ppollfds(fds,nfds);
 291  assert(vb2.used <= amtread);
 292  if (vb2.used != amtread) Psyntax("junk at end of line");
 293  P_updatetime();
 294  return r;
 295 }
 296 #endif
 297 int Hsocket(    int domain , int type , int protocol    ) {
 298  int r, amtread;
 299  char *ep;
 300   Tmust("socket","domain",domain==AF_INET || domain==AF_INET6);
 301   Tmust("socket","type",type==SOCK_STREAM || type==SOCK_DGRAM);
 302  Qsocket(       domain , type   );
 303  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 304  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 305  Tensurereportfile();
 306  fprintf(Treportfile,"%s",vb2.buf);
 307  amtread= strlen(vb2.buf);
 308  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 309   Psyntax("badly formed line");
 310  vb2.buf[amtread]= 0;
 311  if (memcmp(vb2.buf," socket=",8)) Psyntax("syscall reply mismatch");
 312  if (vb2.buf[8] == 'E') {
 313   int e;
 314   e= Perrno(vb2.buf+8);
 315   P_updatetime();
 316   errno= e;
 317   return -1;
 318  }
 319   r= strtoul(vb2.buf+8,&ep,10);
 320   if (*ep && *ep!=' ') Psyntax("return value not E* or positive number");
 321   vb2.used= ep - (char*)vb2.buf;
 322  assert(vb2.used <= amtread);
 323  if (vb2.used != amtread) Psyntax("junk at end of line");
 324  P_updatetime();
 325  return r;
 326 }
 327 int Hfcntl(     int fd , int cmd , ...  ) {
 328  int r, amtread;
 329         va_list al; long arg;
 330   Tmust("fcntl","cmd",cmd==F_SETFL || cmd==F_GETFL);
 331   if (cmd == F_SETFL) {
 332     va_start(al,cmd); arg= va_arg(al,long); va_end(al);
 333   } else {
 334     arg= 0;
 335   }
 336  Qfcntl(        fd , cmd , arg  );
 337  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 338  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 339  Tensurereportfile();
 340  fprintf(Treportfile,"%s",vb2.buf);
 341  amtread= strlen(vb2.buf);
 342  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 343   Psyntax("badly formed line");
 344  vb2.buf[amtread]= 0;
 345  if (memcmp(vb2.buf," fcntl=",7)) Psyntax("syscall reply mismatch");
 346  if (vb2.buf[7] == 'E') {
 347   int e;
 348   e= Perrno(vb2.buf+7);
 349   P_updatetime();
 350   errno= e;
 351   return -1;
 352  }
 353   r= 0;
 354   if (cmd == F_GETFL) {
 355     if (!memcmp(vb2.buf+7,"O_NONBLOCK|...",14)) {
 356       r= O_NONBLOCK;
 357       vb2.used= 7+14;
 358     } else if (!memcmp(vb2.buf+7,"~O_NONBLOCK&...",15)) {
 359       vb2.used= 7+15;
 360     } else {
 361       Psyntax("fcntl flags not O_NONBLOCK|... or ~O_NONBLOCK&...");
 362     }
 363   } else if (cmd == F_SETFL) {
 364   if (memcmp(vb2.buf+7,"OK",2)) Psyntax("success/fail not E* or OK");
 365   vb2.used= 7+2;
 366   r= 0;
 367   } else {
 368     Psyntax("fcntl not F_GETFL or F_SETFL");
 369   }
 370  assert(vb2.used <= amtread);
 371  if (vb2.used != amtread) Psyntax("junk at end of line");
 372  P_updatetime();
 373  return r;
 374 }
 375 int Hconnect(   int fd , const struct sockaddr *addr , int addrlen      ) {
 376  int r, amtread;
 377  Qconnect(      fd , addr , addrlen     );
 378  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 379  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 380  Tensurereportfile();
 381  fprintf(Treportfile,"%s",vb2.buf);
 382  amtread= strlen(vb2.buf);
 383  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 384   Psyntax("badly formed line");
 385  vb2.buf[amtread]= 0;
 386  if (memcmp(vb2.buf," connect=",9)) Psyntax("syscall reply mismatch");
 387  if (vb2.buf[9] == 'E') {
 388   int e;
 389   e= Perrno(vb2.buf+9);
 390   P_updatetime();
 391   errno= e;
 392   return -1;
 393  }
 394   if (memcmp(vb2.buf+9,"OK",2)) Psyntax("success/fail not E* or OK");
 395   vb2.used= 9+2;
 396   r= 0;
 397  assert(vb2.used <= amtread);
 398  if (vb2.used != amtread) Psyntax("junk at end of line");
 399  P_updatetime();
 400  return r;
 401 }
 402 int Hbind(      int fd , const struct sockaddr *addr , int addrlen      ) {
 403  int r, amtread;
 404  Qbind( fd , addr , addrlen     );
 405  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 406  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 407  Tensurereportfile();
 408  fprintf(Treportfile,"%s",vb2.buf);
 409  amtread= strlen(vb2.buf);
 410  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 411   Psyntax("badly formed line");
 412  vb2.buf[amtread]= 0;
 413  if (memcmp(vb2.buf," bind=",6)) Psyntax("syscall reply mismatch");
 414  if (vb2.buf[6] == 'E') {
 415   int e;
 416   e= Perrno(vb2.buf+6);
 417   P_updatetime();
 418   errno= e;
 419   return -1;
 420  }
 421   if (memcmp(vb2.buf+6,"OK",2)) Psyntax("success/fail not E* or OK");
 422   vb2.used= 6+2;
 423   r= 0;
 424  assert(vb2.used <= amtread);
 425  if (vb2.used != amtread) Psyntax("junk at end of line");
 426  P_updatetime();
 427  return r;
 428 }
 429 int Hlisten(    int fd , int backlog    ) {
 430  int r, amtread;
 431  Qlisten(       fd , backlog    );
 432  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 433  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 434  Tensurereportfile();
 435  fprintf(Treportfile,"%s",vb2.buf);
 436  amtread= strlen(vb2.buf);
 437  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 438   Psyntax("badly formed line");
 439  vb2.buf[amtread]= 0;
 440  if (memcmp(vb2.buf," listen=",8)) Psyntax("syscall reply mismatch");
 441  if (vb2.buf[8] == 'E') {
 442   int e;
 443   e= Perrno(vb2.buf+8);
 444   P_updatetime();
 445   errno= e;
 446   return -1;
 447  }
 448   if (memcmp(vb2.buf+8,"OK",2)) Psyntax("success/fail not E* or OK");
 449   vb2.used= 8+2;
 450   r= 0;
 451  assert(vb2.used <= amtread);
 452  if (vb2.used != amtread) Psyntax("junk at end of line");
 453  P_updatetime();
 454  return r;
 455 }
 456 int Hclose(     int fd  ) {
 457  int r, amtread;
 458  Qclose(        fd      );
 459  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 460  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 461  Tensurereportfile();
 462  fprintf(Treportfile,"%s",vb2.buf);
 463  amtread= strlen(vb2.buf);
 464  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 465   Psyntax("badly formed line");
 466  vb2.buf[amtread]= 0;
 467  if (memcmp(vb2.buf," close=",7)) Psyntax("syscall reply mismatch");
 468  if (vb2.buf[7] == 'E') {
 469   int e;
 470   e= Perrno(vb2.buf+7);
 471   P_updatetime();
 472   errno= e;
 473   return -1;
 474  }
 475   if (memcmp(vb2.buf+7,"OK",2)) Psyntax("success/fail not E* or OK");
 476   vb2.used= 7+2;
 477   r= 0;
 478  assert(vb2.used <= amtread);
 479  if (vb2.used != amtread) Psyntax("junk at end of line");
 480  P_updatetime();
 481  return r;
 482 }
 483 int Hsendto(    int fd , const void *msg , int msglen , unsigned int flags , const struct sockaddr *addr , int addrlen  ) {
 484  int r, amtread;
 485  char *ep;
 486         Tmust("sendto","flags",flags==0);
 487  Qsendto(       fd , msg , msglen , addr , addrlen      );
 488  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 489  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 490  Tensurereportfile();
 491  fprintf(Treportfile,"%s",vb2.buf);
 492  amtread= strlen(vb2.buf);
 493  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 494   Psyntax("badly formed line");
 495  vb2.buf[amtread]= 0;
 496  if (memcmp(vb2.buf," sendto=",8)) Psyntax("syscall reply mismatch");
 497  if (vb2.buf[8] == 'E') {
 498   int e;
 499   e= Perrno(vb2.buf+8);
 500   P_updatetime();
 501   errno= e;
 502   return -1;
 503  }
 504   r= strtoul(vb2.buf+8,&ep,10);
 505   if (*ep && *ep!=' ') Psyntax("return value not E* or positive number");
 506   vb2.used= ep - (char*)vb2.buf;
 507  assert(vb2.used <= amtread);
 508  if (vb2.used != amtread) Psyntax("junk at end of line");
 509  P_updatetime();
 510  return r;
 511 }
 512 int Hrecvfrom(  int fd , void *buf , int buflen , unsigned int flags , struct sockaddr *addr , int *addrlen     ) {
 513  int r, amtread;
 514         Tmust("recvfrom","flags",flags==0);
 515         Tmust("recvfrom","*addrlen",*addrlen>=sizeof(struct sockaddr_in));
 516  Qrecvfrom(     fd , buflen , *addrlen  );
 517  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 518  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 519  Tensurereportfile();
 520  fprintf(Treportfile,"%s",vb2.buf);
 521  amtread= strlen(vb2.buf);
 522  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 523   Psyntax("badly formed line");
 524  vb2.buf[amtread]= 0;
 525  if (memcmp(vb2.buf," recvfrom=",10)) Psyntax("syscall reply mismatch");
 526  if (vb2.buf[10] == 'E') {
 527   int e;
 528   e= Perrno(vb2.buf+10);
 529   P_updatetime();
 530   errno= e;
 531   return -1;
 532  }
 533   if (memcmp(vb2.buf+10,"OK",2)) Psyntax("success/fail not E* or OK");
 534   vb2.used= 10+2;
 535   r= 0;
 536         Parg("addr"); Paddr(addr,addrlen);
 537  assert(vb2.used <= amtread);
 538  if (vb2.used != amtread) Psyntax("junk at end of line");
 539         r= Pbytes(buf,buflen);
 540  P_updatetime();
 541  return r;
 542 }
 543 int Hread(      int fd , void *buf , size_t buflen      ) {
 544  int r, amtread;
 545  Qread( fd , buflen     );
 546  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 547  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 548  Tensurereportfile();
 549  fprintf(Treportfile,"%s",vb2.buf);
 550  amtread= strlen(vb2.buf);
 551  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 552   Psyntax("badly formed line");
 553  vb2.buf[amtread]= 0;
 554  if (memcmp(vb2.buf," read=",6)) Psyntax("syscall reply mismatch");
 555  if (vb2.buf[6] == 'E') {
 556   int e;
 557   e= Perrno(vb2.buf+6);
 558   P_updatetime();
 559   errno= e;
 560   return -1;
 561  }
 562   if (memcmp(vb2.buf+6,"OK",2)) Psyntax("success/fail not E* or OK");
 563   vb2.used= 6+2;
 564   r= 0;
 565  assert(vb2.used <= amtread);
 566  if (vb2.used != amtread) Psyntax("junk at end of line");
 567         r= Pbytes(buf,buflen);
 568  P_updatetime();
 569  return r;
 570 }
 571 int Hwrite(     int fd , const void *buf , size_t len   ) {
 572  int r, amtread;
 573  char *ep;
 574  Qwrite(        fd , buf , len  );
 575  if (!adns__vbuf_ensure(&vb2,1000)) Tnomem();
 576  fgets(vb2.buf,vb2.avail,Tinputfile); Pcheckinput();
 577  Tensurereportfile();
 578  fprintf(Treportfile,"%s",vb2.buf);
 579  amtread= strlen(vb2.buf);
 580  if (amtread<=0 || vb2.buf[--amtread]!='\n')
 581   Psyntax("badly formed line");
 582  vb2.buf[amtread]= 0;
 583  if (memcmp(vb2.buf," write=",7)) Psyntax("syscall reply mismatch");
 584  if (vb2.buf[7] == 'E') {
 585   int e;
 586   e= Perrno(vb2.buf+7);
 587   P_updatetime();
 588   errno= e;
 589   return -1;
 590  }
 591   r= strtoul(vb2.buf+7,&ep,10);
 592   if (*ep && *ep!=' ') Psyntax("return value not E* or positive number");
 593   vb2.used= ep - (char*)vb2.buf;
 594  assert(vb2.used <= amtread);
 595  if (vb2.used != amtread) Psyntax("junk at end of line");
 596  P_updatetime();
 597  return r;
 598 }