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                         printflags(fdflags, tcp->u_arg[2], "FD_???");
 282                         break;
 283                 case F_SETOWN: case F_DUPFD:
 284                         tprintf(", %ld", tcp->u_arg[2]);
 285                         break;
 286                 case F_SETFL:
 287                         tprintf(", ");
 288                         printflags(openmodes, tcp->u_arg[2] + 1, "O_???");
 289                         break;
 290                 case F_SETLK: case F_SETLKW:
 291 #ifdef F_FREESP
 292                 case F_FREESP:
 293 #endif
 294                         tprintf(", ");
 295                         printflock(tcp, tcp->u_arg[2], 0);
 296                         break;
 297 #if _LFS64_LARGEFILE
 298 #ifdef F_FREESP64
 299                 case F_FREESP64:
 300 #endif
 301                 /* Linux glibc defines SETLK64 as SETLK,
 302                    even though the kernel has different values - as does Solaris. */
 303 #if defined(F_SETLK64) && F_SETLK64+0!=F_SETLK
 304                 case F_SETLK64:
 305 #endif
 306 #if defined(F_SETLKW64) && F_SETLKW64+0!=F_SETLKW
 307                 case F_SETLKW64:
 308 #endif
 309                         tprintf(", ");
 310                         printflock64(tcp, tcp->u_arg[2], 0);
 311                         break;
 312 #endif
 313                 }
 314         }
 315         else {
 316                 switch (tcp->u_arg[1]) {
 317                 case F_DUPFD:
 318                 case F_SETFD: case F_SETFL:
 319                 case F_SETLK: case F_SETLKW:
 320                 case F_SETOWN: case F_GETOWN:
 321                         break;
 322                 case F_GETFD:
 323                         if (tcp->u_rval == 0)
 324                                 return 0;
 325                         tcp->auxstr = sprintflags(fdflags, tcp->u_rval);
 326                         return RVAL_HEX|RVAL_STR;
 327                 case F_GETFL:
 328                         tcp->auxstr = sprintflags(openmodes, tcp->u_rval + 1);
 329                         return RVAL_HEX|RVAL_STR;
 330                 case F_GETLK:
 331                         tprintf(", ");
 332                         printflock(tcp, tcp->u_arg[2], 1);
 333                         break;
 334 #if _LFS64_LARGEFILE
 335 #if defined(F_GETLK64) && F_GETLK64+0!=F_GETLK
 336                 case F_GETLK64:
 337 #endif
 338                         tprintf(", ");
 339                         printflock64(tcp, tcp->u_arg[2], 1);
 340                         break;
 341 #endif
 342                 default:
 343                         tprintf(", %#lx", tcp->u_arg[2]);
 344                         break;
 345                 }
 346         }
 347         return 0;
 348 }
 349
 350 #ifdef LOCK_SH
 351
 352 int
 353 sys_flock(tcp)
 354 struct tcb *tcp;
 355 {
 356         if (entering(tcp)) {
 357                 tprintf("%ld, ", tcp->u_arg[0]);
 358                 printflags(flockcmds, tcp->u_arg[1], "LOCK_???");
 359         }
 360         return 0;
 361 }
 362 #endif /* LOCK_SH */
 363
 364 int
 365 sys_close(tcp)
 366 struct tcb *tcp;
 367 {
 368         if (entering(tcp)) {
 369                 tprintf("%ld", tcp->u_arg[0]);
 370         }
 371         return 0;
 372 }
 373
 374 int
 375 sys_dup(tcp)
 376 struct tcb *tcp;
 377 {
 378         if (entering(tcp)) {
 379                 tprintf("%ld", tcp->u_arg[0]);
 380         }
 381         return 0;
 382 }
 383
 384 int
 385 sys_dup2(tcp)
 386 struct tcb *tcp;
 387 {
 388         if (entering(tcp)) {
 389                 tprintf("%ld, %ld", tcp->u_arg[0], tcp->u_arg[1]);
 390         }
 391         return 0;
 392 }
 393
 394 #if defined(ALPHA) || defined(FREEBSD) || defined(SUNOS4)
 395 int
 396 sys_getdtablesize(tcp)
 397 struct tcb *tcp;
 398 {
 399         return 0;
 400 }
 401 #endif /* ALPHA || FREEBSD || SUNOS4 */
 402
 403 static int
 404 decode_select(tcp, args, bitness)
 405 struct tcb *tcp;
 406 long *args;
 407 int bitness;
 408 {
 409         int i, j, nfds;
 410         unsigned int fdsize = ((((args[0] + 7) / 8) + sizeof(long) - 1)
 411                                & -sizeof(long));
 412         fd_set *fds;
 413         struct timeval tv;
 414 #ifdef ALPHA
 415         struct timeval32 {
 416                 unsigned tv_sec;
 417                 unsigned tv_usec;
 418         } *tv32;
 419 #endif
 420         static char outstr[1024];
 421         char *sep;
 422         long arg;
 423
 424         if (entering(tcp)) {
 425                 fds = (fd_set *) malloc(fdsize);
 426                 if (fds == NULL)
 427                         fprintf(stderr, "out of memory\n");
 428                 nfds = args[0];
 429                 tprintf("%d", nfds);
 430                 for (i = 0; i < 3; i++) {
 431                         arg = args[i+1];
 432                         if (arg == 0) {
 433                                 tprintf(", NULL");
 434                                 continue;
 435                         }
 436                         if (fds == NULL || !verbose(tcp)) {
 437                                 tprintf(", %#lx", arg);
 438                                 continue;
 439                         }
 440                         if (umoven(tcp, arg, fdsize, (char *) fds) < 0) {
 441                                 tprintf(", [?]");
 442                                 continue;
 443                         }
 444                         tprintf(", [");
 445                         for (j = 0, sep = ""; j < nfds; j++) {
 446                                 if (FD_ISSET(j, fds)) {
 447                                         tprintf("%s%u", sep, j);
 448                                         sep = " ";
 449                                 }
 450                         }
 451                         tprintf("]");
 452                 }
 453                 free(fds);
 454                 if (!args[4])
 455                         tprintf(", NULL");
 456                 else if (!verbose(tcp))
 457                         tprintf(", %#lx", args[4]);
 458                 else if (umove(tcp, args[4], &tv) < 0)
 459                         tprintf(", {...}");
 460                 else {
 461 #ifdef ALPHA
 462                         if (bitness) {
 463                                 tv32=(struct timeval32*)&tv;
 464                                 tprintf(", {%u, %u}", tv32->tv_sec, tv32->tv_usec);
 465                         } else
 466 #endif
 467                                 tprintf(", {%lu, %lu}",
 468                                         (long) tv.tv_sec, (long) tv.tv_usec);
 469                 }
 470         }
 471         else
 472         {
 473                 unsigned int cumlen = 0;
 474                 char *sep = "";
 475
 476                 if (syserror(tcp))
 477                         return 0;
 478
 479                 if ((nfds = tcp->u_rval) == 0) {
 480                         tcp->auxstr = "Timeout";
 481                         return RVAL_STR;
 482                 }
 483
 484                 fds = (fd_set *) malloc(fdsize);
 485                 if (fds == NULL)
 486                         fprintf(stderr, "out of memory\n");
 487
 488                 outstr[0] = '\0';
 489                 for (i = 0; i < 3; i++) {
 490                         int first = 1;
 491                         char str[20];
 492
 493                         tcp->auxstr = outstr;
 494                         arg = args[i+1];
 495                         if (fds == NULL || !arg ||
 496                             umoven(tcp, arg, fdsize, (char *) fds) < 0)
 497                                 continue;
 498                         for (j = 0; j < args[0]; j++) {
 499                                 if (FD_ISSET(j, fds)) {
 500                                         if (first) {
 501                                                 sprintf(str, "%s%s [%u", sep,
 502                                                         i == 0 ? "in" :
 503                                                         i == 1 ? "out" :
 504                                                         "except", j);
 505                                                 first = 0;
 506                                                 sep = ", ";
 507                                         }
 508                                         else
 509                                                 sprintf(str, " %u", j);
 510                                         cumlen += strlen(str);
 511                                         if (cumlen < sizeof(outstr))
 512                                                 strcat(outstr, str);
 513                                         nfds--;
 514                                 }
 515                         }
 516                         if (cumlen)
 517                                 strcat(outstr, "]");
 518                         if (nfds == 0)
 519                                 break;
 520                 }
 521                 free(fds);
 522 #ifdef LINUX
 523                 /* This contains no useful information on SunOS.  */
 524                 if (args[4]) {
 525                         char str[64];
 526
 527                         if (umove(tcp, args[4], &tv) >= 0) {
 528 #ifdef ALPHA
 529                                 if (bitness) {
 530                                         tv32=(struct timeval32*)&tv;
 531                                         sprintf(str, "%sleft {%u, %u}", sep,
 532                                                 tv32->tv_sec, tv32->tv_usec);
 533                                 } else
 534 #endif
 535                                         sprintf(str, "%sleft {%lu, %lu}", sep,
 536                                                 (long) tv.tv_sec, (long) tv.tv_usec);
 537
 538                                 if ((cumlen += strlen(str)) < sizeof(outstr))
 539                                         strcat(outstr, str);
 540                         }
 541                 }
 542 #endif /* LINUX */
 543                 return RVAL_STR;
 544         }
 545         return 0;
 546 }
 547
 548 #ifdef LINUX
 549
 550 int
 551 sys_oldselect(tcp)
 552 struct tcb *tcp;
 553 {
 554         long args[5];
 555
 556         if (umoven(tcp, tcp->u_arg[0], sizeof args, (char *) args) < 0) {
 557                 tprintf("[...]");
 558                 return 0;
 559         }
 560         return decode_select(tcp, args, 0);
 561 }
 562
 563 #ifdef ALPHA
 564 int
 565 sys_osf_select(tcp)
 566 struct tcb *tcp;
 567 {
 568         long *args = tcp->u_arg;
 569         return decode_select(tcp, args, 1);
 570 }
 571 #endif
 572
 573 static struct xlat epollctls[] = {
 574 #ifdef EPOLL_CTL_ADD
 575         { EPOLL_CTL_ADD,        "EPOLL_CTL_ADD" },
 576 #endif
 577 #ifdef EPOLL_CTL_MOD
 578         { EPOLL_CTL_MOD,        "EPOLL_CTL_MOD" },
 579 #endif
 580 #ifdef EPOLL_CTL_DEL
 581         { EPOLL_CTL_DEL,        "EPOLL_CTL_DEL" },
 582 #endif
 583         { 0,                    NULL            }
 584 };
 585
 586 static struct xlat epollevents[] = {
 587 #ifdef EPOLLIN
 588         { EPOLLIN,      "EPOLLIN"       },
 589 #endif
 590 #ifdef EPOLLPRI
 591         { EPOLLPRI,     "EPOLLPRI"      },
 592 #endif
 593 #ifdef EPOLLOUT
 594         { EPOLLOUT,     "EPOLLOUT"      },
 595 #endif
 596 #ifdef EPOLLRDNORM
 597         { EPOLLRDNORM,  "EPOLLRDNORM"   },
 598 #endif
 599 #ifdef EPOLLRDBAND
 600         { EPOLLRDBAND,  "EPOLLRDBAND"   },
 601 #endif
 602 #ifdef EPOLLWRNORM
 603         { EPOLLWRNORM,  "EPOLLWRNORM"   },
 604 #endif
 605 #ifdef EPOLLWRBAND
 606         { EPOLLWRBAND,  "EPOLLWRBAND"   },
 607 #endif
 608 #ifdef EPOLLMSG
 609         { EPOLLMSG,     "EPOLLMSG"      },
 610 #endif
 611 #ifdef EPOLLERR
 612         { EPOLLERR,     "EPOLLERR"      },
 613 #endif
 614 #ifdef EPOLLHUP
 615         { EPOLLHUP,     "EPOLLHUP"      },
 616 #endif
 617 #ifdef EPOLLONESHOT
 618         { EPOLLONESHOT, "EPOLLONESHOT"  },
 619 #endif
 620 #ifdef EPOLLET
 621         { EPOLLET,      "EPOLLET"       },
 622 #endif
 623         { 0,            NULL            }
 624 };
 625
 626 int
 627 sys_epoll_create(tcp)
 628 struct tcb *tcp;
 629 {
 630         if (entering(tcp))
 631                 tprintf("%ld", tcp->u_arg[0]);
 632         return 0;
 633 }
 634
 635 #ifdef HAVE_SYS_EPOLL_H
 636 static void
 637 print_epoll_event(ev)
 638 struct epoll_event *ev;
 639 {
 640         tprintf("{");
 641         printflags(epollevents, ev->events, "EPOLL???");
 642         /* We cannot know what format the program uses, so print u32 and u64
 643            which will cover every value.  */
 644         tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
 645                 ev->data.u32, ev->data.u64);
 646 }
 647 #endif
 648
 649 int
 650 sys_epoll_ctl(tcp)
 651 struct tcb *tcp;
 652 {
 653         if (entering(tcp)) {
 654                 tprintf("%ld, ", tcp->u_arg[0]);
 655                 printxval(epollctls, tcp->u_arg[1], "EPOLL_CTL_???");
 656                 tprintf(", %ld, ", tcp->u_arg[2]);
 657                 if (tcp->u_arg[3] == 0)
 658                         tprintf("NULL");
 659                 else {
 660 #ifdef HAVE_SYS_EPOLL_H
 661                         struct epoll_event ev;
 662                         if (umove(tcp, tcp->u_arg[3], &ev) == 0)
 663                                 print_epoll_event(&ev);
 664                         else
 665 #endif
 666                                 tprintf("{...}");
 667                 }
 668         }
 669         return 0;
 670 }
 671
 672 int
 673 sys_epoll_wait(tcp)
 674 struct tcb *tcp;
 675 {
 676         if (entering(tcp))
 677                 tprintf("%ld, ", tcp->u_arg[0]);
 678         else {
 679                 if (syserror(tcp))
 680                         tprintf("%lx", tcp->u_arg[1]);
 681                 else if (tcp->u_rval == 0)
 682                         tprintf("{}");
 683                 else {
 684 #ifdef HAVE_SYS_EPOLL_H
 685                         struct epoll_event ev, *start, *cur, *end;
 686                         int failed = 0;
 687
 688                         tprintf("{");
 689                         start = (struct epoll_event *) tcp->u_arg[1];
 690                         end = start + tcp->u_rval;
 691                         for (cur = start; cur < end; ++cur) {
 692                                 if (cur > start)
 693                                         tprintf(", ");
 694                                 if (umove(tcp, (long) cur, &ev) == 0)
 695                                         print_epoll_event(&ev);
 696                                 else {
 697                                         tprintf("?");
 698                                         failed = 1;
 699                                         break;
 700                                 }
 701                         }
 702                         tprintf("}");
 703                         if (failed)
 704                                 tprintf(" %#lx", (long) start);
 705 #else
 706                         tprintf("{...}");
 707 #endif
 708                 }
 709                 tprintf(", %ld, %ld", tcp->u_arg[2], tcp->u_arg[3]);
 710         }
 711         return 0;
 712 }
 713
 714 int
 715 sys_io_setup(tcp)
 716 struct tcb *tcp;
 717 {
 718         if (entering(tcp))
 719                 tprintf("%ld, ", tcp->u_arg[0]);
 720         else {
 721                 if (syserror(tcp))
 722                         tprintf("0x%0lx", tcp->u_arg[1]);
 723                 else {
 724                         unsigned long user_id;
 725                         if (umove(tcp, tcp->u_arg[1], &user_id) == 0)
 726                                 tprintf("{%lu}", user_id);
 727                         else
 728                                 tprintf("{...}");
 729                 }
 730         }
 731         return 0;
 732 }
 733
 734 int
 735 sys_io_destroy(tcp)
 736 struct tcb *tcp;
 737 {
 738         if (entering(tcp))
 739                 tprintf("%lu", tcp->u_arg[0]);
 740         return 0;
 741 }
 742
 743 int
 744 sys_io_submit(tcp)
 745 struct tcb *tcp;
 746 {
 747         long nr;
 748         if (entering(tcp)) {
 749                 tprintf("%lu, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
 750                 nr = tcp->u_arg[1];
 751                 /* and if nr is negative? */
 752                 if (nr == 0)
 753                         tprintf("{}");
 754                 else {
 755 #ifdef HAVE_LIBAIO_H
 756                         long i;
 757                         struct iocb *iocbp, **iocbs = (void *)tcp->u_arg[2];
 758
 759                         for (i = 0; i < nr; i++, iocbs++) {
 760                                 struct iocb iocb;
 761                                 if (i == 0)
 762                                         tprintf("{");
 763                                 else
 764                                         tprintf(", ");
 765
 766                                 if (umove(tcp, (unsigned long)iocbs, &iocbp) ||
 767                                     umove(tcp, (unsigned long)iocbp, &iocb)) {
 768                                         tprintf("{...}");
 769                                         continue;
 770                                 }
 771                                 tprintf("{%p, %u, %hu, %hu, %d}",
 772                                         iocb.data, iocb.key,
 773                                         iocb.aio_lio_opcode,
 774                                         iocb.aio_reqprio, iocb.aio_fildes);
 775                         }
 776                         if (i)
 777                                 tprintf("}");
 778 #else
 779                         tprintf("{...}");
 780 #endif
 781                 }
 782         }
 783         return 0;
 784 }
 785
 786 int
 787 sys_io_cancel(tcp)
 788 struct tcb *tcp;
 789 {
 790         if (entering(tcp)) {
 791 #ifdef HAVE_LIBAIO_H
 792                 struct iocb iocb;
 793 #endif
 794                 tprintf("%lu, ", tcp->u_arg[0]);
 795 #ifdef HAVE_LIBAIO_H
 796                 if (umove(tcp, tcp->u_arg[1], &iocb) == 0) {
 797                         tprintf("{%p, %u, %hu, %hu, %d}, ",
 798                                 iocb.data, iocb.key,
 799                                 iocb.aio_lio_opcode,
 800                                 iocb.aio_reqprio, iocb.aio_fildes);
 801                 } else
 802 #endif
 803                         tprintf("{...}, ");
 804         } else {
 805                 if (tcp->u_rval < 0)
 806                         tprintf("{...}");
 807                 else {
 808 #ifdef HAVE_LIBAIO_H
 809                         struct io_event event;
 810                         if (umove(tcp, tcp->u_arg[2], &event) == 0)
 811                                 tprintf("{%p, %p, %ld, %ld}",
 812                                         event.data, event.obj,
 813                                         event.res, event.res2);
 814                         else
 815 #endif
 816                                 tprintf("{...}");
 817                 }
 818         }
 819         return 0;
 820 }
 821
 822 int
 823 sys_io_getevents(tcp)
 824 struct tcb *tcp;
 825 {
 826         if (entering(tcp)) {
 827                 tprintf("%ld, %ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1],
 828                         tcp->u_arg[2]);
 829         } else {
 830                 if (tcp->u_rval == 0) {
 831                         tprintf("{}");
 832                 } else  {
 833 #ifdef HAVE_LIBAIO_H
 834                         struct io_event *events = (void *)tcp->u_arg[3];
 835                         long i, nr = tcp->u_rval;
 836
 837                         for (i = 0; i < nr; i++, events++) {
 838                                 struct io_event event;
 839
 840                                 if (i == 0)
 841                                         tprintf("{");
 842                                 else
 843                                         tprintf(", ");
 844
 845                                 if (umove(tcp, (unsigned long)events, &event) != 0) {
 846                                         tprintf("{...}");
 847                                         continue;
 848                                 }
 849                                 tprintf("{%p, %p, %ld, %ld}", event.data,
 850                                         event.obj, event.res, event.res2);
 851                         }
 852                         tprintf("}, ");
 853 #else
 854                                 tprintf("{...}");
 855 #endif
 856                 }
 857
 858                 if (tcp->u_arg[4] == 0)
 859                         tprintf("NULL");
 860                 else {
 861                         struct timespec to;
 862                         if (umove(tcp, tcp->u_arg[4], &to) == 0)
 863                                 tprintf("{%lu, %lu}", to.tv_sec, to.tv_nsec);
 864                         else
 865                                 tprintf("{...}");
 866                 }
 867         }
 868         return 0;
 869 }
 870 #endif /* LINUX */
 871
 872 int
 873 sys_select(tcp)
 874 struct tcb *tcp;
 875 {
 876         return decode_select(tcp, tcp->u_arg, 0);
 877 }
 878
 879 #ifdef LINUX
 880 int
 881 sys_pselect6(struct tcb *tcp)
 882 {
 883         int rc = decode_select(tcp, tcp->u_arg, 0);
 884         if (exiting(tcp)) {
 885                 struct {
 886                         void *ss;
 887                         unsigned long len;
 888                 } data;
 889                 if (umove(tcp, tcp->u_arg[5], &data) < 0)
 890                         tprintf(", %#lx", tcp->u_arg[5]);
 891                 else {
 892                         tprintf(", {");
 893                         if (data.len < sizeof(sigset_t))
 894                                 tprintf("%#lx", (long)data.ss);
 895                         else
 896                                 print_sigset(tcp, (long)data.ss, 0);
 897                         tprintf(", %lu}", data.len);
 898                 }
 899         }
 900         return rc;
 901 }
 902 #endif