granicus.if.org Git - strace/blob - desc.c

   1 /*
   2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *      $Id$
  31  */
  32
  33 #include "defs.h"
  34
  35 #include <fcntl.h>
  36 #include <sys/file.h>
  37 #ifdef LINUX
  38 #include <inttypes.h>
  39 #endif
  40 #ifdef HAVE_SYS_EPOLL_H
  41 #include <sys/epoll.h>
  42 #endif
  43 #ifdef HAVE_LIBAIO_H
  44 #include <libaio.h>
  45 #endif
  46
  47 #if HAVE_LONG_LONG_OFF_T
  48 /*
  49  * Hacks for systems that have a long long off_t
  50  */
  51 #define flock64 flock           /* Horrid hack */
  52 #define printflock printflock64 /* Horrider hack */
  53 #endif
  54
  55
  56 static const struct xlat fcntlcmds[] = {
  57         { F_DUPFD,      "F_DUPFD"       },
  58         { F_GETFD,      "F_GETFD"       },
  59         { F_SETFD,      "F_SETFD"       },
  60         { F_GETFL,      "F_GETFL"       },
  61         { F_SETFL,      "F_SETFL"       },
  62         { F_GETLK,      "F_GETLK"       },
  63         { F_SETLK,      "F_SETLK"       },
  64         { F_SETLKW,     "F_SETLKW"      },
  65         { F_GETOWN,     "F_GETOWN"      },
  66         { F_SETOWN,     "F_SETOWN"      },
  67 #ifdef F_RSETLK
  68         { F_RSETLK,     "F_RSETLK"      },
  69 #endif
  70 #ifdef F_RSETLKW
  71         { F_RSETLKW,    "F_RSETLKW"     },
  72 #endif
  73 #ifdef F_RGETLK
  74         { F_RGETLK,     "F_RGETLK"      },
  75 #endif
  76 #ifdef F_CNVT
  77         { F_CNVT,       "F_CNVT"        },
  78 #endif
  79 #ifdef F_SETSIG
  80         { F_SETSIG,     "F_SETSIG"      },
  81 #endif
  82 #ifdef F_GETSIG
  83         { F_GETSIG,     "F_GETSIG"      },
  84 #endif
  85 #ifdef F_CHKFL
  86         { F_CHKFL,      "F_CHKFL"       },
  87 #endif
  88 #ifdef F_DUP2FD
  89         { F_DUP2FD,     "F_DUP2FD"      },
  90 #endif
  91 #ifdef F_ALLOCSP
  92         { F_ALLOCSP,    "F_ALLOCSP"     },
  93 #endif
  94 #ifdef F_ISSTREAM
  95         { F_ISSTREAM,   "F_ISSTREAM"    },
  96 #endif
  97 #ifdef F_PRIV
  98         { F_PRIV,       "F_PRIV"        },
  99 #endif
 100 #ifdef F_NPRIV
 101         { F_NPRIV,      "F_NPRIV"       },
 102 #endif
 103 #ifdef F_QUOTACL
 104         { F_QUOTACL,    "F_QUOTACL"     },
 105 #endif
 106 #ifdef F_BLOCKS
 107         { F_BLOCKS,     "F_BLOCKS"      },
 108 #endif
 109 #ifdef F_BLKSIZE
 110         { F_BLKSIZE,    "F_BLKSIZE"     },
 111 #endif
 112 #ifdef F_GETOWN
 113         { F_GETOWN,     "F_GETOWN"      },
 114 #endif
 115 #ifdef F_SETOWN
 116         { F_SETOWN,     "F_SETOWN"      },
 117 #endif
 118 #ifdef F_REVOKE
 119         { F_REVOKE,     "F_REVOKE"      },
 120 #endif
 121 #ifdef F_SETLK
 122         { F_SETLK,      "F_SETLK"       },
 123 #endif
 124 #ifdef F_SETLKW
 125         { F_SETLKW,     "F_SETLKW"      },
 126 #endif
 127 #ifdef F_FREESP
 128         { F_FREESP,     "F_FREESP"      },
 129 #endif
 130 #ifdef F_GETLK
 131         { F_GETLK,      "F_GETLK"       },
 132 #endif
 133 #ifdef F_SETLK64
 134         { F_SETLK64,    "F_SETLK64"     },
 135 #endif
 136 #ifdef F_SETLKW64
 137         { F_SETLKW64,   "F_SETLKW64"    },
 138 #endif
 139 #ifdef F_FREESP64
 140         { F_FREESP64,   "F_FREESP64"    },
 141 #endif
 142 #ifdef F_GETLK64
 143         { F_GETLK64,    "F_GETLK64"     },
 144 #endif
 145 #ifdef F_SHARE
 146         { F_SHARE,      "F_SHARE"       },
 147 #endif
 148 #ifdef F_UNSHARE
 149         { F_UNSHARE,    "F_UNSHARE"     },
 150 #endif
 151         { 0,            NULL            },
 152 };
 153
 154 static const struct xlat fdflags[] = {
 155 #ifdef FD_CLOEXEC
 156         { FD_CLOEXEC,   "FD_CLOEXEC"    },
 157 #endif
 158         { 0,            NULL            },
 159 };
 160
 161 #ifdef LOCK_SH
 162
 163 static const struct xlat flockcmds[] = {
 164         { LOCK_SH,      "LOCK_SH"       },
 165         { LOCK_EX,      "LOCK_EX"       },
 166         { LOCK_NB,      "LOCK_NB"       },
 167         { LOCK_UN,      "LOCK_UN"       },
 168         { 0,            NULL            },
 169 };
 170
 171 #endif /* LOCK_SH */
 172
 173 static const struct xlat lockfcmds[] = {
 174         { F_RDLCK,      "F_RDLCK"       },
 175         { F_WRLCK,      "F_WRLCK"       },
 176         { F_UNLCK,      "F_UNLCK"       },
 177 #ifdef F_EXLCK
 178         { F_EXLCK,      "F_EXLCK"       },
 179 #endif
 180 #ifdef F_SHLCK
 181         { F_SHLCK,      "F_SHLCK"       },
 182 #endif
 183         { 0,            NULL            },
 184 };
 185
 186 static const struct xlat whence[] = {
 187         { SEEK_SET,     "SEEK_SET"      },
 188         { SEEK_CUR,     "SEEK_CUR"      },
 189         { SEEK_END,     "SEEK_END"      },
 190         { 0,            NULL            },
 191 };
 192
 193 #ifndef HAVE_LONG_LONG_OFF_T
 194 /* fcntl/lockf */
 195 static void
 196 printflock(tcp, addr, getlk)
 197 struct tcb *tcp;
 198 long addr;
 199 int getlk;
 200 {
 201         struct flock fl;
 202
 203         if (umove(tcp, addr, &fl) < 0) {
 204                 tprintf("{...}");
 205                 return;
 206         }
 207         tprintf("{type=");
 208         printxval(lockfcmds, fl.l_type, "F_???");
 209         tprintf(", whence=");
 210         printxval(whence, fl.l_whence, "SEEK_???");
 211         tprintf(", start=%ld, len=%ld", fl.l_start, fl.l_len);
 212         if (getlk)
 213                 tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
 214         else
 215                 tprintf("}");
 216 }
 217 #endif
 218
 219 #if _LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T
 220 /* fcntl/lockf */
 221 static void
 222 printflock64(tcp, addr, getlk)
 223 struct tcb *tcp;
 224 long addr;
 225 int getlk;
 226 {
 227         struct flock64 fl;
 228
 229         if (umove(tcp, addr, &fl) < 0) {
 230                 tprintf("{...}");
 231                 return;
 232         }
 233         tprintf("{type=");
 234         printxval(lockfcmds, fl.l_type, "F_???");
 235         tprintf(", whence=");
 236         printxval(whence, fl.l_whence, "SEEK_???");
 237         tprintf(", start=%lld, len=%lld", (long long) fl.l_start, (long long) fl.l_len);
 238         if (getlk)
 239                 tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
 240         else
 241                 tprintf("}");
 242 }
 243 #endif
 244
 245 static char *
 246 sprintflags(xlat, flags)
 247 const struct xlat *xlat;
 248 int flags;
 249 {
 250         static char outstr[1024];
 251         char *sep;
 252
 253         strcpy(outstr, "flags ");
 254         sep = "";
 255         for (; xlat->str; xlat++) {
 256                 if ((flags & xlat->val) == xlat->val) {
 257                         sprintf(outstr + strlen(outstr),
 258                                 "%s%s", sep, xlat->str);
 259                         sep = "|";
 260                         flags &= ~xlat->val;
 261                 }
 262         }
 263         if (flags)
 264                 sprintf(outstr + strlen(outstr),
 265                         "%s%#x", sep, flags);
 266         return outstr;
 267 }
 268
 269 int
 270 sys_fcntl(tcp)
 271 struct tcb *tcp;
 272 {
 273         extern const struct xlat openmodes[];
 274
 275         if (entering(tcp)) {
 276                 tprintf("%ld, ", tcp->u_arg[0]);
 277                 printxval(fcntlcmds, tcp->u_arg[1], "F_???");
 278                 switch (tcp->u_arg[1]) {
 279                 case F_SETFD:
 280                         tprintf(", ");
 281                         if (printflags(fdflags, tcp->u_arg[2]) == 0)
 282                                 tprintf("0");
 283                         break;
 284                 case F_SETOWN: case F_DUPFD:
 285                         tprintf(", %ld", tcp->u_arg[2]);
 286                         break;
 287                 case F_SETFL:
 288                         tprintf(", ");
 289                         if (printflags(openmodes, tcp->u_arg[2] + 1) == 0)
 290                                 tprintf("0");
 291                         break;
 292                 case F_SETLK: case F_SETLKW:
 293 #ifdef F_FREESP
 294                 case F_FREESP:
 295 #endif
 296                         tprintf(", ");
 297                         printflock(tcp, tcp->u_arg[2], 0);
 298                         break;
 299 #if _LFS64_LARGEFILE
 300 #ifdef F_FREESP64
 301                 case F_FREESP64:
 302 #endif
 303                 /* Linux glibc defines SETLK64 as SETLK,
 304                    even though the kernel has different values - as does Solaris. */
 305 #if defined(F_SETLK64) && F_SETLK64+0!=F_SETLK
 306                 case F_SETLK64:
 307 #endif
 308 #if defined(F_SETLKW64) && F_SETLKW64+0!=F_SETLKW
 309                 case F_SETLKW64:
 310 #endif
 311                         tprintf(", ");
 312                         printflock64(tcp, tcp->u_arg[2], 0);
 313                         break;
 314 #endif
 315                 }
 316         }
 317         else {
 318                 switch (tcp->u_arg[1]) {
 319                 case F_DUPFD:
 320                 case F_SETFD: case F_SETFL:
 321                 case F_SETLK: case F_SETLKW:
 322                 case F_SETOWN: case F_GETOWN:
 323                         break;
 324                 case F_GETFD:
 325                         if (tcp->u_rval == 0)
 326                                 return 0;
 327                         tcp->auxstr = sprintflags(fdflags, tcp->u_rval);
 328                         return RVAL_HEX|RVAL_STR;
 329                 case F_GETFL:
 330                         tcp->auxstr = sprintflags(openmodes, tcp->u_rval + 1);
 331                         return RVAL_HEX|RVAL_STR;
 332                 case F_GETLK:
 333                         tprintf(", ");
 334                         printflock(tcp, tcp->u_arg[2], 1);
 335                         break;
 336 #if _LFS64_LARGEFILE
 337 #if defined(F_GETLK64) && F_GETLK64+0!=F_GETLK
 338                 case F_GETLK64:
 339 #endif
 340                         tprintf(", ");
 341                         printflock64(tcp, tcp->u_arg[2], 1);
 342                         break;
 343 #endif
 344                 default:
 345                         tprintf(", %#lx", tcp->u_arg[2]);
 346                         break;
 347                 }
 348         }
 349         return 0;
 350 }
 351
 352 #ifdef LOCK_SH
 353
 354 int
 355 sys_flock(tcp)
 356 struct tcb *tcp;
 357 {
 358         if (entering(tcp)) {
 359                 tprintf("%ld, ", tcp->u_arg[0]);
 360                 if (!printflags(flockcmds, tcp->u_arg[1]))
 361                         tprintf("LOCK_???");
 362         }
 363         return 0;
 364 }
 365 #endif /* LOCK_SH */
 366
 367 int
 368 sys_close(tcp)
 369 struct tcb *tcp;
 370 {
 371         if (entering(tcp)) {
 372                 tprintf("%ld", tcp->u_arg[0]);
 373         }
 374         return 0;
 375 }
 376
 377 int
 378 sys_dup(tcp)
 379 struct tcb *tcp;
 380 {
 381         if (entering(tcp)) {
 382                 tprintf("%ld", tcp->u_arg[0]);
 383         }
 384         return 0;
 385 }
 386
 387 int
 388 sys_dup2(tcp)
 389 struct tcb *tcp;
 390 {
 391         if (entering(tcp)) {
 392                 tprintf("%ld, %ld", tcp->u_arg[0], tcp->u_arg[1]);
 393         }
 394         return 0;
 395 }
 396
 397 int
 398 sys_getdtablesize(tcp)
 399 struct tcb *tcp;
 400 {
 401         return 0;
 402 }
 403
 404 static int
 405 decode_select(tcp, args, bitness)
 406 struct tcb *tcp;
 407 long *args;
 408 int bitness;
 409 {
 410         int i, j, nfds;
 411         unsigned int fdsize = ((((args[0] + 7) / 8) + sizeof(long) - 1)
 412                                & -sizeof(long));
 413         fd_set *fds;
 414         struct timeval tv;
 415 #ifdef ALPHA
 416         struct timeval32 {
 417                 unsigned tv_sec;
 418                 unsigned tv_usec;
 419         } *tv32;
 420 #endif
 421         static char outstr[1024];
 422         char *sep;
 423         long arg;
 424
 425         if (entering(tcp)) {
 426                 fds = (fd_set *) malloc(fdsize);
 427                 if (fds == NULL) {
 428                         tprintf("out of memory\n");
 429                         return 0;
 430                 }
 431                 nfds = args[0];
 432                 tprintf("%d", nfds);
 433                 for (i = 0; i < 3; i++) {
 434                         arg = args[i+1];
 435                         if (arg == 0) {
 436                                 tprintf(", NULL");
 437                                 continue;
 438                         }
 439                         if (!verbose(tcp)) {
 440                                 tprintf(", %#lx", arg);
 441                                 continue;
 442                         }
 443                         if (umoven(tcp, arg, fdsize, (char *) fds) < 0) {
 444                                 tprintf(", [?]");
 445                                 continue;
 446                         }
 447                         tprintf(", [");
 448                         for (j = 0, sep = ""; j < nfds; j++) {
 449                                 if (FD_ISSET(j, fds)) {
 450                                         tprintf("%s%u", sep, j);
 451                                         sep = " ";
 452                                 }
 453                         }
 454                         tprintf("]");
 455                 }
 456                 free(fds);
 457                 if (!args[4])
 458                         tprintf(", NULL");
 459                 else if (!verbose(tcp))
 460                         tprintf(", %#lx", args[4]);
 461                 else if (umove(tcp, args[4], &tv) < 0)
 462                         tprintf(", {...}");
 463                 else {
 464 #ifdef ALPHA
 465                         if (bitness) {
 466                                 tv32=(struct timeval32*)&tv;
 467                                 tprintf(", {%u, %u}", tv32->tv_sec, tv32->tv_usec);
 468                         } else
 469 #endif
 470                                 tprintf(", {%lu, %lu}",
 471                                         (long) tv.tv_sec, (long) tv.tv_usec);
 472                 }
 473         }
 474         else
 475         {
 476                 unsigned int cumlen = 0;
 477                 char *sep = "";
 478
 479                 if (syserror(tcp))
 480                         return 0;
 481
 482                 if ((nfds = tcp->u_rval) == 0) {
 483                         tcp->auxstr = "Timeout";
 484                         return RVAL_STR;
 485                 }
 486
 487                 fds = (fd_set *) malloc(fdsize);
 488                 if (fds == NULL) {
 489                         tprintf("out of memory\n");
 490                         return 0;
 491                 }
 492
 493                 outstr[0] = '\0';
 494                 for (i = 0; i < 3; i++) {
 495                         int first = 1;
 496                         char str[20];
 497
 498                         tcp->auxstr = outstr;
 499                         arg = args[i+1];
 500                         if (!arg || umoven(tcp, arg, fdsize, (char *) fds) < 0)
 501                                 continue;
 502                         for (j = 0; j < args[0]; j++) {
 503                                 if (FD_ISSET(j, fds)) {
 504                                         if (first) {
 505                                                 sprintf(str, "%s%s [%u", sep,
 506                                                         i == 0 ? "in" :
 507                                                         i == 1 ? "out" :
 508                                                         "except", j);
 509                                                 first = 0;
 510                                                 sep = ", ";
 511                                         }
 512                                         else
 513                                                 sprintf(str, " %u", j);
 514                                         cumlen += strlen(str);
 515                                         if (cumlen < sizeof(outstr))
 516                                                 strcat(outstr, str);
 517                                         nfds--;
 518                                 }
 519                         }
 520                         if (cumlen)
 521                                 strcat(outstr, "]");
 522                         if (nfds == 0)
 523                                 break;
 524                 }
 525                 free(fds);
 526 #ifdef LINUX
 527                 /* This contains no useful information on SunOS.  */
 528                 if (args[4]) {
 529                         char str[64];
 530
 531                         if (umove(tcp, args[4], &tv) >= 0) {
 532 #ifdef ALPHA
 533                                 if (bitness) {
 534                                         tv32=(struct timeval32*)&tv;
 535                                         sprintf(str, "%sleft {%u, %u}", sep,
 536                                                 tv32->tv_sec, tv32->tv_usec);
 537                                 } else
 538 #endif
 539                                         sprintf(str, "%sleft {%lu, %lu}", sep,
 540                                                 (long) tv.tv_sec, (long) tv.tv_usec);
 541
 542                                 if ((cumlen += strlen(str)) < sizeof(outstr))
 543                                         strcat(outstr, str);
 544                         }
 545                 }
 546 #endif /* LINUX */
 547                 return RVAL_STR;
 548         }
 549         return 0;
 550 }
 551
 552 #ifdef LINUX
 553
 554 int
 555 sys_oldselect(tcp)
 556 struct tcb *tcp;
 557 {
 558         long args[5];
 559
 560         if (umoven(tcp, tcp->u_arg[0], sizeof args, (char *) args) < 0) {
 561                 tprintf("[...]");
 562                 return 0;
 563         }
 564         return decode_select(tcp, args, 0);
 565 }
 566
 567 #ifdef ALPHA
 568 int
 569 sys_osf_select(tcp)
 570 struct tcb *tcp;
 571 {
 572         long *args = tcp->u_arg;
 573         return decode_select(tcp, args, 1);
 574 }
 575 #endif
 576
 577 static struct xlat epollctls[] = {
 578 #ifdef EPOLL_CTL_ADD
 579         { EPOLL_CTL_ADD,        "EPOLL_CTL_ADD" },
 580 #endif
 581 #ifdef EPOLL_CTL_MOD
 582         { EPOLL_CTL_MOD,        "EPOLL_CTL_MOD" },
 583 #endif
 584 #ifdef EPOLL_CTL_DEL
 585         { EPOLL_CTL_DEL,        "EPOLL_CTL_DEL" },
 586 #endif
 587         { 0,                    NULL            }
 588 };
 589
 590 static struct xlat epollevents[] = {
 591 #ifdef EPOLLIN
 592         { EPOLLIN,      "EPOLLIN"       },
 593 #endif
 594 #ifdef EPOLLPRI
 595         { EPOLLPRI,     "EPOLLPRI"      },
 596 #endif
 597 #ifdef EPOLLOUT
 598         { EPOLLOUT,     "EPOLLOUT"      },
 599 #endif
 600 #ifdef EPOLLRDNORM
 601         { EPOLLRDNORM,  "EPOLLRDNORM"   },
 602 #endif
 603 #ifdef EPOLLRDBAND
 604         { EPOLLRDBAND,  "EPOLLRDBAND"   },
 605 #endif
 606 #ifdef EPOLLWRNORM
 607         { EPOLLWRNORM,  "EPOLLWRNORM"   },
 608 #endif
 609 #ifdef EPOLLWRBAND
 610         { EPOLLWRBAND,  "EPOLLWRBAND"   },
 611 #endif
 612 #ifdef EPOLLMSG
 613         { EPOLLMSG,     "EPOLLMSG"      },
 614 #endif
 615 #ifdef EPOLLERR
 616         { EPOLLERR,     "EPOLLERR"      },
 617 #endif
 618 #ifdef EPOLLHUP
 619         { EPOLLHUP,     "EPOLLHUP"      },
 620 #endif
 621 #ifdef EPOLLONESHOT
 622         { EPOLLONESHOT, "EPOLLONESHOT"  },
 623 #endif
 624 #ifdef EPOLLET
 625         { EPOLLET,      "EPOLLET"       },
 626 #endif
 627         { 0,            NULL            }
 628 };
 629
 630 int
 631 sys_epoll_create(tcp)
 632 struct tcb *tcp;
 633 {
 634         if (entering(tcp))
 635                 tprintf("%ld", tcp->u_arg[0]);
 636         return 0;
 637 }
 638
 639 #ifdef HAVE_SYS_EPOLL_H
 640 static void
 641 print_epoll_event(ev)
 642 struct epoll_event *ev;
 643 {
 644         tprintf("{");
 645         if (printflags(epollevents, ev->events) == 0)
 646                 tprintf("0");
 647         /* We cannot know what format the program uses, so print u32 and u64
 648            which will cover every value.  */
 649         tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
 650                 ev->data.u32, ev->data.u64);
 651 }
 652 #endif
 653
 654 int
 655 sys_epoll_ctl(tcp)
 656 struct tcb *tcp;
 657 {
 658         if (entering(tcp)) {
 659                 tprintf("%ld, ", tcp->u_arg[0]);
 660                 printxval(epollctls, tcp->u_arg[1], "EPOLL_CTL_???");
 661                 tprintf(", %ld, ", tcp->u_arg[2]);
 662                 if (tcp->u_arg[3] == 0)
 663                         tprintf("NULL");
 664                 else {
 665 #ifdef HAVE_SYS_EPOLL_H
 666                         struct epoll_event ev;
 667                         if (umove(tcp, tcp->u_arg[3], &ev) == 0)
 668                                 print_epoll_event(&ev);
 669                         else
 670 #endif
 671                                 tprintf("{...}");
 672                 }
 673         }
 674         return 0;
 675 }
 676
 677 int
 678 sys_epoll_wait(tcp)
 679 struct tcb *tcp;
 680 {
 681         if (entering(tcp))
 682                 tprintf("%ld, ", tcp->u_arg[0]);
 683         else {
 684                 if (syserror(tcp))
 685                         tprintf("%lx", tcp->u_arg[1]);
 686                 else if (tcp->u_rval == 0)
 687                         tprintf("{}");
 688                 else {
 689 #ifdef HAVE_SYS_EPOLL_H
 690                         struct epoll_event evs[tcp->u_rval];
 691                         if (umove(tcp, tcp->u_arg[1], evs) == 0) {
 692                                 unsigned long i;
 693                                 tprintf("{");
 694                                 for (i = 0; i < tcp->u_rval; ++i) {
 695                                         if (i > 0)
 696                                                 tprintf(", ");
 697                                         print_epoll_event(&evs[i]);
 698                                 }
 699                                 tprintf("}");
 700                         }
 701                         else
 702 #endif
 703                                 tprintf("{...}");
 704                 }
 705                 tprintf(", %ld, %ld", tcp->u_arg[2], tcp->u_arg[3]);
 706         }
 707         return 0;
 708 }
 709
 710 int
 711 sys_io_setup(tcp)
 712 struct tcb *tcp;
 713 {
 714         if (entering(tcp))
 715                 tprintf("%ld, ", tcp->u_arg[0]);
 716         else {
 717                 if (syserror(tcp))
 718                         tprintf("0x%0lx", tcp->u_arg[1]);
 719                 else {
 720                         unsigned long user_id;
 721                         if (umove(tcp, tcp->u_arg[1], &user_id) == 0)
 722                                 tprintf("{%lu}", user_id);
 723                         else
 724                                 tprintf("{...}");
 725                 }
 726         }
 727         return 0;
 728 }
 729
 730 int
 731 sys_io_destroy(tcp)
 732 struct tcb *tcp;
 733 {
 734         if (entering(tcp))
 735                 tprintf("%lu", tcp->u_arg[0]);
 736         return 0;
 737 }
 738
 739 int
 740 sys_io_submit(tcp)
 741 struct tcb *tcp;
 742 {
 743         long nr;
 744         if (entering(tcp)) {
 745                 tprintf("%lu, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
 746                 nr = tcp->u_arg[1];
 747                 /* and if nr is negative? */
 748                 if (nr == 0)
 749                         tprintf("{}");
 750                 else {
 751 #ifdef HAVE_LIBAIO_H
 752                         long i;
 753                         struct iocb *iocbp, **iocbs = (void *)tcp->u_arg[2];
 754
 755                         for (i = 0; i < nr; i++, iocbs++) {
 756                                 struct iocb iocb;
 757                                 if (i == 0)
 758                                         tprintf("{");
 759                                 else
 760                                         tprintf(", ");
 761
 762                                 if (umove(tcp, (unsigned long)iocbs, &iocbp) ||
 763                                     umove(tcp, (unsigned long)iocbp, &iocb)) {
 764                                         tprintf("{...}");
 765                                         continue;
 766                                 }
 767                                 tprintf("{%p, %u, %hu, %hu, %d}",
 768                                         iocb.data, iocb.key,
 769                                         iocb.aio_lio_opcode,
 770                                         iocb.aio_reqprio, iocb.aio_fildes);
 771                         }
 772                         if (i)
 773                                 tprintf("}");
 774 #else
 775                         tprintf("{...}");
 776 #endif
 777                 }
 778         }
 779         return 0;
 780 }
 781
 782 int
 783 sys_io_cancel(tcp)
 784 struct tcb *tcp;
 785 {
 786         if (entering(tcp)) {
 787 #ifdef HAVE_LIBAIO_H
 788                 struct iocb iocb;
 789 #endif
 790                 tprintf("%lu, ", tcp->u_arg[0]);
 791 #ifdef HAVE_LIBAIO_H
 792                 if (umove(tcp, tcp->u_arg[1], &iocb) == 0) {
 793                         tprintf("{%p, %u, %hu, %hu, %d}, ",
 794                                 iocb.data, iocb.key,
 795                                 iocb.aio_lio_opcode,
 796                                 iocb.aio_reqprio, iocb.aio_fildes);
 797                 } else
 798 #endif
 799                         tprintf("{...}, ");
 800         } else {
 801                 if (tcp->u_rval < 0)
 802                         tprintf("{...}");
 803                 else {
 804 #ifdef HAVE_LIBAIO_H
 805                         struct io_event event;
 806                         if (umove(tcp, tcp->u_arg[2], &event) == 0)
 807                                 tprintf("{%p, %p, %ld, %ld}",
 808                                         event.data, event.obj,
 809                                         event.res, event.res2);
 810                         else
 811 #endif
 812                                 tprintf("{...}");
 813                 }
 814         }
 815         return 0;
 816 }
 817
 818 int
 819 sys_io_getevents(tcp)
 820 struct tcb *tcp;
 821 {
 822         if (entering(tcp)) {
 823                 tprintf("%ld, %ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1],
 824                         tcp->u_arg[2]);
 825         } else {
 826                 if (tcp->u_rval == 0) {
 827                         tprintf("{}");
 828                 } else  {
 829 #ifdef HAVE_LIBAIO_H
 830                         struct io_event *events = (void *)tcp->u_arg[3];
 831                         long i, nr = tcp->u_rval;
 832
 833                         for (i = 0; i < nr; i++, events++) {
 834                                 struct io_event event;
 835
 836                                 if (i == 0)
 837                                         tprintf("{");
 838                                 else
 839                                         tprintf(", ");
 840
 841                                 if (umove(tcp, (unsigned long)events, &event) != 0) {
 842                                         tprintf("{...}");
 843                                         continue;
 844                                 }
 845                                 tprintf("{%p, %p, %ld, %ld}", event.data,
 846                                         event.obj, event.res, event.res2);
 847                         }
 848                         tprintf("}, ");
 849 #else
 850                                 tprintf("{...}");
 851 #endif
 852                 }
 853
 854                 if (tcp->u_arg[4] == 0)
 855                         tprintf("NULL");
 856                 else {
 857                         struct timespec to;
 858                         if (umove(tcp, tcp->u_arg[4], &to) == 0)
 859                                 tprintf("{%lu, %lu}", to.tv_sec, to.tv_nsec);
 860                         else
 861                                 tprintf("{...}");
 862                 }
 863         }
 864         return 0;
 865 }
 866 #endif /* LINUX */
 867
 868 int
 869 sys_select(tcp)
 870 struct tcb *tcp;
 871 {
 872         long *args = tcp->u_arg;
 873         return decode_select(tcp, args, 0);
 874 }