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 #ifdef F_SETLEASE
 152         { F_SETLEASE,   "F_SETLEASE"    },
 153 #endif
 154 #ifdef F_GETLEASE
 155         { F_GETLEASE,   "F_GETLEASE"    },
 156 #endif
 157 #ifdef F_NOTIFY
 158         { F_NOTIFY,     "F_NOTIFY"      },
 159 #endif
 160 #ifdef F_DUPFD_CLOEXEC
 161         { F_DUPFD_CLOEXEC,"F_DUPFD_CLOEXEC"},
 162 #endif
 163         { 0,            NULL            },
 164 };
 165
 166 static const struct xlat fdflags[] = {
 167 #ifdef FD_CLOEXEC
 168         { FD_CLOEXEC,   "FD_CLOEXEC"    },
 169 #endif
 170         { 0,            NULL            },
 171 };
 172
 173 #ifdef LOCK_SH
 174
 175 static const struct xlat flockcmds[] = {
 176         { LOCK_SH,      "LOCK_SH"       },
 177         { LOCK_EX,      "LOCK_EX"       },
 178         { LOCK_NB,      "LOCK_NB"       },
 179         { LOCK_UN,      "LOCK_UN"       },
 180         { 0,            NULL            },
 181 };
 182
 183 #endif /* LOCK_SH */
 184
 185 static const struct xlat lockfcmds[] = {
 186         { F_RDLCK,      "F_RDLCK"       },
 187         { F_WRLCK,      "F_WRLCK"       },
 188         { F_UNLCK,      "F_UNLCK"       },
 189 #ifdef F_EXLCK
 190         { F_EXLCK,      "F_EXLCK"       },
 191 #endif
 192 #ifdef F_SHLCK
 193         { F_SHLCK,      "F_SHLCK"       },
 194 #endif
 195         { 0,            NULL            },
 196 };
 197
 198 #ifdef F_NOTIFY
 199 static const struct xlat notifyflags[] = {
 200 #ifdef DN_ACCESS
 201         { DN_ACCESS,    "DN_ACCESS"     },
 202 #endif
 203 #ifdef DN_MODIFY
 204         { DN_MODIFY,    "DN_MODIFY"     },
 205 #endif
 206 #ifdef DN_CREATE
 207         { DN_CREATE,    "DN_CREATE"     },
 208 #endif
 209 #ifdef DN_DELETE
 210         { DN_DELETE,    "DN_DELETE"     },
 211 #endif
 212 #ifdef DN_RENAME
 213         { DN_RENAME,    "DN_RENAME"     },
 214 #endif
 215 #ifdef DN_ATTRIB
 216         { DN_ATTRIB,    "DN_ATTRIB"     },
 217 #endif
 218 #ifdef DN_MULTISHOT
 219         { DN_MULTISHOT, "DN_MULTISHOT"  },
 220 #endif
 221         { 0,            NULL            },
 222 };
 223 #endif
 224
 225 static const struct xlat whence[] = {
 226         { SEEK_SET,     "SEEK_SET"      },
 227         { SEEK_CUR,     "SEEK_CUR"      },
 228         { SEEK_END,     "SEEK_END"      },
 229         { 0,            NULL            },
 230 };
 231
 232 #ifndef HAVE_LONG_LONG_OFF_T
 233 /* fcntl/lockf */
 234 static void
 235 printflock(struct tcb *tcp, long addr, int getlk)
 236 {
 237         struct flock fl;
 238
 239 #if SUPPORTED_PERSONALITIES > 1
 240         if (personality_wordsize[current_personality] != sizeof(fl.l_start)) {
 241                 if (personality_wordsize[current_personality] == 4) {
 242                         /* 32-bit x86 app on x86_64 and similar cases */
 243                         struct {
 244                                 short int l_type;
 245                                 short int l_whence;
 246                                 int32_t l_start; /* off_t */
 247                                 int32_t l_len; /* off_t */
 248                                 int32_t l_pid; /* pid_t */
 249                         } fl32;
 250                         if (umove(tcp, addr, &fl32) < 0) {
 251                                 tprintf("{...}");
 252                                 return;
 253                         }
 254                         fl.l_type = fl32.l_type;
 255                         fl.l_whence = fl32.l_whence;
 256                         fl.l_start = fl32.l_start;
 257                         fl.l_len = fl32.l_len;
 258                         fl.l_pid = fl32.l_pid;
 259                 } else {
 260                         /* let people know we have a problem here */
 261                         tprintf("{ <decode error: unsupported wordsize %d> }",
 262                                 personality_wordsize[current_personality]);
 263                         return;
 264                 }
 265         } else
 266 #endif
 267         {
 268                 if (umove(tcp, addr, &fl) < 0) {
 269                         tprintf("{...}");
 270                         return;
 271                 }
 272         }
 273         tprintf("{type=");
 274         printxval(lockfcmds, fl.l_type, "F_???");
 275         tprintf(", whence=");
 276         printxval(whence, fl.l_whence, "SEEK_???");
 277         tprintf(", start=%ld, len=%ld", fl.l_start, fl.l_len);
 278         if (getlk)
 279                 tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
 280         else
 281                 tprintf("}");
 282 }
 283 #endif
 284
 285 #if _LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T
 286 /* fcntl/lockf */
 287 static void
 288 printflock64(struct tcb *tcp, long addr, int getlk)
 289 {
 290         struct flock64 fl;
 291
 292         if (umove(tcp, addr, &fl) < 0) {
 293                 tprintf("{...}");
 294                 return;
 295         }
 296         tprintf("{type=");
 297         printxval(lockfcmds, fl.l_type, "F_???");
 298         tprintf(", whence=");
 299         printxval(whence, fl.l_whence, "SEEK_???");
 300         tprintf(", start=%lld, len=%lld", (long long) fl.l_start, (long long) fl.l_len);
 301         if (getlk)
 302                 tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
 303         else
 304                 tprintf("}");
 305 }
 306 #endif
 307
 308 int
 309 sys_fcntl(struct tcb *tcp)
 310 {
 311         if (entering(tcp)) {
 312                 tprintf("%ld, ", tcp->u_arg[0]);
 313                 printxval(fcntlcmds, tcp->u_arg[1], "F_???");
 314                 switch (tcp->u_arg[1]) {
 315                 case F_SETFD:
 316                         tprintf(", ");
 317                         printflags(fdflags, tcp->u_arg[2], "FD_???");
 318                         break;
 319                 case F_SETOWN: case F_DUPFD:
 320 #ifdef F_DUPFD_CLOEXEC
 321                 case F_DUPFD_CLOEXEC:
 322 #endif
 323                         tprintf(", %ld", tcp->u_arg[2]);
 324                         break;
 325                 case F_SETFL:
 326                         tprintf(", ");
 327                         tprint_open_modes(tcp->u_arg[2]);
 328                         break;
 329                 case F_SETLK: case F_SETLKW:
 330 #ifdef F_FREESP
 331                 case F_FREESP:
 332 #endif
 333                         tprintf(", ");
 334                         printflock(tcp, tcp->u_arg[2], 0);
 335                         break;
 336 #if _LFS64_LARGEFILE
 337 #ifdef F_FREESP64
 338                 case F_FREESP64:
 339 #endif
 340                 /* Linux glibc defines SETLK64 as SETLK,
 341                    even though the kernel has different values - as does Solaris. */
 342 #if defined(F_SETLK64) && F_SETLK64 + 0 != F_SETLK
 343                 case F_SETLK64:
 344 #endif
 345 #if defined(F_SETLKW64) && F_SETLKW64 + 0 != F_SETLKW
 346                 case F_SETLKW64:
 347 #endif
 348                         tprintf(", ");
 349                         printflock64(tcp, tcp->u_arg[2], 0);
 350                         break;
 351 #endif
 352 #ifdef F_NOTIFY
 353                 case F_NOTIFY:
 354                         tprintf(", ");
 355                         printflags(notifyflags, tcp->u_arg[2], "DN_???");
 356                         break;
 357 #endif
 358 #ifdef F_SETLEASE
 359                 case F_SETLEASE:
 360                         tprintf(", ");
 361                         printxval(lockfcmds, tcp->u_arg[2], "F_???");
 362                         break;
 363 #endif
 364                 }
 365         }
 366         else {
 367                 switch (tcp->u_arg[1]) {
 368                 case F_DUPFD:
 369 #ifdef F_DUPFD_CLOEXEC
 370                 case F_DUPFD_CLOEXEC:
 371 #endif
 372                 case F_SETFD: case F_SETFL:
 373                 case F_SETLK: case F_SETLKW:
 374                 case F_SETOWN: case F_GETOWN:
 375 #ifdef F_NOTIFY
 376                 case F_NOTIFY:
 377 #endif
 378 #ifdef F_SETLEASE
 379                 case F_SETLEASE:
 380 #endif
 381                         break;
 382                 case F_GETFD:
 383                         if (syserror(tcp) || tcp->u_rval == 0)
 384                                 return 0;
 385                         tcp->auxstr = sprintflags("flags ", fdflags, tcp->u_rval);
 386                         return RVAL_HEX|RVAL_STR;
 387                 case F_GETFL:
 388                         if (syserror(tcp))
 389                                 return 0;
 390                         tcp->auxstr = sprint_open_modes(tcp->u_rval);
 391                         return RVAL_HEX|RVAL_STR;
 392                 case F_GETLK:
 393                         tprintf(", ");
 394                         printflock(tcp, tcp->u_arg[2], 1);
 395                         break;
 396 #if _LFS64_LARGEFILE
 397 #if defined(F_GETLK64) && F_GETLK64+0!=F_GETLK
 398                 case F_GETLK64:
 399 #endif
 400                         tprintf(", ");
 401                         printflock64(tcp, tcp->u_arg[2], 1);
 402                         break;
 403 #endif
 404 #ifdef F_GETLEASE
 405                 case F_GETLEASE:
 406                         if (syserror(tcp))
 407                                 return 0;
 408                         tcp->auxstr = xlookup(lockfcmds, tcp->u_rval);
 409                         return RVAL_HEX|RVAL_STR;
 410 #endif
 411                 default:
 412                         tprintf(", %#lx", tcp->u_arg[2]);
 413                         break;
 414                 }
 415         }
 416         return 0;
 417 }
 418
 419 #ifdef LOCK_SH
 420
 421 int
 422 sys_flock(struct tcb *tcp)
 423 {
 424         if (entering(tcp)) {
 425                 tprintf("%ld, ", tcp->u_arg[0]);
 426                 printflags(flockcmds, tcp->u_arg[1], "LOCK_???");
 427         }
 428         return 0;
 429 }
 430 #endif /* LOCK_SH */
 431
 432 int
 433 sys_close(struct tcb *tcp)
 434 {
 435         if (entering(tcp)) {
 436                 tprintf("%ld", tcp->u_arg[0]);
 437         }
 438         return 0;
 439 }
 440
 441 int
 442 sys_dup(struct tcb *tcp)
 443 {
 444         if (entering(tcp)) {
 445                 tprintf("%ld", tcp->u_arg[0]);
 446         }
 447         return 0;
 448 }
 449
 450 static int
 451 do_dup2(struct tcb *tcp, int flags_arg)
 452 {
 453         if (entering(tcp)) {
 454                 tprintf("%ld, %ld", tcp->u_arg[0], tcp->u_arg[1]);
 455                 if (flags_arg >= 0) {
 456                         tprintf(", ");
 457                         printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
 458                 }
 459         }
 460         return 0;
 461 }
 462
 463 int
 464 sys_dup2(struct tcb *tcp)
 465 {
 466         return do_dup2(tcp, -1);
 467 }
 468
 469 #ifdef LINUX
 470 int
 471 sys_dup3(struct tcb *tcp)
 472 {
 473         return do_dup2(tcp, 2);
 474 }
 475 #endif
 476
 477 #if defined(ALPHA) || defined(FREEBSD) || defined(SUNOS4)
 478 int
 479 sys_getdtablesize(struct tcb *tcp)
 480 {
 481         return 0;
 482 }
 483 #endif /* ALPHA || FREEBSD || SUNOS4 */
 484
 485 static int
 486 decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
 487 {
 488         int i, j, nfds;
 489         unsigned int fdsize = ((((args[0] + 7) / 8) + sizeof(long) - 1)
 490                                & -sizeof(long));
 491         fd_set *fds;
 492         static char outstr[1024];
 493         char *sep;
 494         long arg;
 495
 496         if (entering(tcp)) {
 497                 fds = (fd_set *) malloc(fdsize);
 498                 if (fds == NULL)
 499                         fprintf(stderr, "out of memory\n");
 500                 nfds = args[0];
 501                 tprintf("%d", nfds);
 502                 for (i = 0; i < 3; i++) {
 503                         arg = args[i+1];
 504                         if (arg == 0) {
 505                                 tprintf(", NULL");
 506                                 continue;
 507                         }
 508                         if (fds == NULL || !verbose(tcp)) {
 509                                 tprintf(", %#lx", arg);
 510                                 continue;
 511                         }
 512                         if (umoven(tcp, arg, fdsize, (char *) fds) < 0) {
 513                                 tprintf(", [?]");
 514                                 continue;
 515                         }
 516                         tprintf(", [");
 517                         for (j = 0, sep = ""; j < nfds; j++) {
 518                                 if (FD_ISSET(j, fds)) {
 519                                         tprintf("%s%u", sep, j);
 520                                         sep = " ";
 521                                 }
 522                         }
 523                         tprintf("]");
 524                 }
 525                 free(fds);
 526                 tprintf(", ");
 527                 printtv_bitness(tcp, args[4], bitness, 0);
 528         }
 529         else
 530         {
 531                 unsigned int cumlen = 0;
 532                 char *sep = "";
 533
 534                 if (syserror(tcp))
 535                         return 0;
 536
 537                 if ((nfds = tcp->u_rval) == 0) {
 538                         tcp->auxstr = "Timeout";
 539                         return RVAL_STR;
 540                 }
 541
 542                 fds = (fd_set *) malloc(fdsize);
 543                 if (fds == NULL)
 544                         fprintf(stderr, "out of memory\n");
 545
 546                 outstr[0] = '\0';
 547                 for (i = 0; i < 3; i++) {
 548                         int first = 1;
 549
 550                         tcp->auxstr = outstr;
 551                         arg = args[i+1];
 552                         if (fds == NULL || !arg ||
 553                             umoven(tcp, arg, fdsize, (char *) fds) < 0)
 554                                 continue;
 555                         for (j = 0; j < args[0]; j++) {
 556                                 if (FD_ISSET(j, fds)) {
 557                                         char str[11 + 3 * sizeof(int)];
 558
 559                                         if (first) {
 560                                                 sprintf(str, "%s%s [%u", sep,
 561                                                         i == 0 ? "in" :
 562                                                         i == 1 ? "out" :
 563                                                         "except", j);
 564                                                 first = 0;
 565                                                 sep = ", ";
 566                                         }
 567                                         else
 568                                                 sprintf(str, " %u", j);
 569                                         cumlen += strlen(str);
 570                                         if (cumlen < sizeof(outstr))
 571                                                 strcat(outstr, str);
 572                                         nfds--;
 573                                 }
 574                         }
 575                         if (cumlen)
 576                                 strcat(outstr, "]");
 577                         if (nfds == 0)
 578                                 break;
 579                 }
 580                 free(fds);
 581 #ifdef LINUX
 582                 /* This contains no useful information on SunOS.  */
 583                 if (args[4]) {
 584                         char str[128];
 585
 586                         sprintf(str, "%sleft ", sep);
 587                         sprinttv(tcp, args[4], bitness, str + strlen(str));
 588                         if ((cumlen += strlen(str)) < sizeof(outstr))
 589                                 strcat(outstr, str);
 590                 }
 591 #endif /* LINUX */
 592                 return RVAL_STR;
 593         }
 594         return 0;
 595 }
 596
 597 #ifdef LINUX
 598
 599 int
 600 sys_oldselect(struct tcb *tcp)
 601 {
 602         long args[5];
 603
 604         if (umoven(tcp, tcp->u_arg[0], sizeof args, (char *) args) < 0) {
 605                 tprintf("[...]");
 606                 return 0;
 607         }
 608         return decode_select(tcp, args, BITNESS_CURRENT);
 609 }
 610
 611 #ifdef ALPHA
 612 int
 613 sys_osf_select(struct tcb *tcp)
 614 {
 615         long *args = tcp->u_arg;
 616         return decode_select(tcp, args, BITNESS_32);
 617 }
 618 #endif
 619
 620 static const struct xlat epollctls[] = {
 621 #ifdef EPOLL_CTL_ADD
 622         { EPOLL_CTL_ADD,        "EPOLL_CTL_ADD" },
 623 #endif
 624 #ifdef EPOLL_CTL_MOD
 625         { EPOLL_CTL_MOD,        "EPOLL_CTL_MOD" },
 626 #endif
 627 #ifdef EPOLL_CTL_DEL
 628         { EPOLL_CTL_DEL,        "EPOLL_CTL_DEL" },
 629 #endif
 630         { 0,                    NULL            }
 631 };
 632
 633 static const struct xlat epollevents[] = {
 634 #ifdef EPOLLIN
 635         { EPOLLIN,      "EPOLLIN"       },
 636 #endif
 637 #ifdef EPOLLPRI
 638         { EPOLLPRI,     "EPOLLPRI"      },
 639 #endif
 640 #ifdef EPOLLOUT
 641         { EPOLLOUT,     "EPOLLOUT"      },
 642 #endif
 643 #ifdef EPOLLRDNORM
 644         { EPOLLRDNORM,  "EPOLLRDNORM"   },
 645 #endif
 646 #ifdef EPOLLRDBAND
 647         { EPOLLRDBAND,  "EPOLLRDBAND"   },
 648 #endif
 649 #ifdef EPOLLWRNORM
 650         { EPOLLWRNORM,  "EPOLLWRNORM"   },
 651 #endif
 652 #ifdef EPOLLWRBAND
 653         { EPOLLWRBAND,  "EPOLLWRBAND"   },
 654 #endif
 655 #ifdef EPOLLMSG
 656         { EPOLLMSG,     "EPOLLMSG"      },
 657 #endif
 658 #ifdef EPOLLERR
 659         { EPOLLERR,     "EPOLLERR"      },
 660 #endif
 661 #ifdef EPOLLHUP
 662         { EPOLLHUP,     "EPOLLHUP"      },
 663 #endif
 664 #ifdef EPOLLONESHOT
 665         { EPOLLONESHOT, "EPOLLONESHOT"  },
 666 #endif
 667 #ifdef EPOLLET
 668         { EPOLLET,      "EPOLLET"       },
 669 #endif
 670         { 0,            NULL            }
 671 };
 672
 673 int
 674 sys_epoll_create(struct tcb *tcp)
 675 {
 676         if (entering(tcp))
 677                 tprintf("%ld", tcp->u_arg[0]);
 678         return 0;
 679 }
 680
 681 int
 682 sys_epoll_create1(struct tcb *tcp)
 683 {
 684         if (entering(tcp))
 685                 printflags(open_mode_flags, tcp->u_arg[0], "O_???");
 686         return 0;
 687 }
 688
 689 #ifdef HAVE_SYS_EPOLL_H
 690 static void
 691 print_epoll_event(struct epoll_event *ev)
 692 {
 693         tprintf("{");
 694         printflags(epollevents, ev->events, "EPOLL???");
 695         /* We cannot know what format the program uses, so print u32 and u64
 696            which will cover every value.  */
 697         tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
 698                 ev->data.u32, ev->data.u64);
 699 }
 700 #endif
 701
 702 int
 703 sys_epoll_ctl(struct tcb *tcp)
 704 {
 705         if (entering(tcp)) {
 706                 tprintf("%ld, ", tcp->u_arg[0]);
 707                 printxval(epollctls, tcp->u_arg[1], "EPOLL_CTL_???");
 708                 tprintf(", %ld, ", tcp->u_arg[2]);
 709                 if (tcp->u_arg[3] == 0)
 710                         tprintf("NULL");
 711                 else {
 712 #ifdef HAVE_SYS_EPOLL_H
 713                         struct epoll_event ev;
 714                         if (umove(tcp, tcp->u_arg[3], &ev) == 0)
 715                                 print_epoll_event(&ev);
 716                         else
 717 #endif
 718                                 tprintf("{...}");
 719                 }
 720         }
 721         return 0;
 722 }
 723
 724 static void
 725 epoll_wait_common(struct tcb *tcp)
 726 {
 727         if (entering(tcp))
 728                 tprintf("%ld, ", tcp->u_arg[0]);
 729         else {
 730                 if (syserror(tcp))
 731                         tprintf("%lx", tcp->u_arg[1]);
 732                 else if (tcp->u_rval == 0)
 733                         tprintf("{}");
 734                 else {
 735 #ifdef HAVE_SYS_EPOLL_H
 736                         struct epoll_event ev, *start, *cur, *end;
 737                         int failed = 0;
 738
 739                         tprintf("{");
 740                         start = (struct epoll_event *) tcp->u_arg[1];
 741                         end = start + tcp->u_rval;
 742                         for (cur = start; cur < end; ++cur) {
 743                                 if (cur > start)
 744                                         tprintf(", ");
 745                                 if (umove(tcp, (long) cur, &ev) == 0)
 746                                         print_epoll_event(&ev);
 747                                 else {
 748                                         tprintf("?");
 749                                         failed = 1;
 750                                         break;
 751                                 }
 752                         }
 753                         tprintf("}");
 754                         if (failed)
 755                                 tprintf(" %#lx", (long) start);
 756 #else
 757                         tprintf("{...}");
 758 #endif
 759                 }
 760                 tprintf(", %ld, %ld", tcp->u_arg[2], tcp->u_arg[3]);
 761         }
 762 }
 763
 764 int
 765 sys_epoll_wait(struct tcb *tcp)
 766 {
 767         epoll_wait_common(tcp);
 768         return 0;
 769 }
 770
 771 int
 772 sys_epoll_pwait(struct tcb *tcp)
 773 {
 774         epoll_wait_common(tcp);
 775         if (exiting(tcp))
 776                 print_sigset(tcp, tcp->u_arg[4], 0);
 777         return 0;
 778 }
 779
 780 int
 781 sys_io_setup(struct tcb *tcp)
 782 {
 783         if (entering(tcp))
 784                 tprintf("%ld, ", tcp->u_arg[0]);
 785         else {
 786                 if (syserror(tcp))
 787                         tprintf("0x%0lx", tcp->u_arg[1]);
 788                 else {
 789                         unsigned long user_id;
 790                         if (umove(tcp, tcp->u_arg[1], &user_id) == 0)
 791                                 tprintf("{%lu}", user_id);
 792                         else
 793                                 tprintf("{...}");
 794                 }
 795         }
 796         return 0;
 797 }
 798
 799 int
 800 sys_io_destroy(struct tcb *tcp)
 801 {
 802         if (entering(tcp))
 803                 tprintf("%lu", tcp->u_arg[0]);
 804         return 0;
 805 }
 806
 807 int
 808 sys_io_submit(struct tcb *tcp)
 809 {
 810         long nr;
 811         if (entering(tcp)) {
 812                 tprintf("%lu, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
 813                 nr = tcp->u_arg[1];
 814                 /* and if nr is negative? */
 815                 if (nr == 0)
 816                         tprintf("{}");
 817                 else {
 818 #ifdef HAVE_LIBAIO_H
 819                         long i;
 820                         struct iocb *iocbp, **iocbs = (void *)tcp->u_arg[2];
 821
 822                         for (i = 0; i < nr; i++, iocbs++) {
 823                                 struct iocb iocb;
 824                                 if (i == 0)
 825                                         tprintf("{");
 826                                 else
 827                                         tprintf(", ");
 828
 829                                 if (umove(tcp, (unsigned long)iocbs, &iocbp) ||
 830                                     umove(tcp, (unsigned long)iocbp, &iocb)) {
 831                                         tprintf("{...}");
 832                                         continue;
 833                                 }
 834                                 tprintf("{%p, %u, %hu, %hu, %d}",
 835                                         iocb.data, iocb.key,
 836                                         iocb.aio_lio_opcode,
 837                                         iocb.aio_reqprio, iocb.aio_fildes);
 838                         }
 839                         if (i)
 840                                 tprintf("}");
 841 #else
 842                         tprintf("{...}");
 843 #endif
 844                 }
 845         }
 846         return 0;
 847 }
 848
 849 int
 850 sys_io_cancel(struct tcb *tcp)
 851 {
 852         if (entering(tcp)) {
 853 #ifdef HAVE_LIBAIO_H
 854                 struct iocb iocb;
 855 #endif
 856                 tprintf("%lu, ", tcp->u_arg[0]);
 857 #ifdef HAVE_LIBAIO_H
 858                 if (umove(tcp, tcp->u_arg[1], &iocb) == 0) {
 859                         tprintf("{%p, %u, %hu, %hu, %d}, ",
 860                                 iocb.data, iocb.key,
 861                                 iocb.aio_lio_opcode,
 862                                 iocb.aio_reqprio, iocb.aio_fildes);
 863                 } else
 864 #endif
 865                         tprintf("{...}, ");
 866         } else {
 867                 if (tcp->u_rval < 0)
 868                         tprintf("{...}");
 869                 else {
 870 #ifdef HAVE_LIBAIO_H
 871                         struct io_event event;
 872                         if (umove(tcp, tcp->u_arg[2], &event) == 0)
 873                                 tprintf("{%p, %p, %ld, %ld}",
 874                                         event.data, event.obj,
 875                                         event.res, event.res2);
 876                         else
 877 #endif
 878                                 tprintf("{...}");
 879                 }
 880         }
 881         return 0;
 882 }
 883
 884 int
 885 sys_io_getevents(struct tcb *tcp)
 886 {
 887         if (entering(tcp)) {
 888                 tprintf("%ld, %ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1],
 889                         tcp->u_arg[2]);
 890         } else {
 891                 if (tcp->u_rval == 0) {
 892                         tprintf("{}");
 893                 } else  {
 894 #ifdef HAVE_LIBAIO_H
 895                         struct io_event *events = (void *)tcp->u_arg[3];
 896                         long i, nr = tcp->u_rval;
 897
 898                         for (i = 0; i < nr; i++, events++) {
 899                                 struct io_event event;
 900
 901                                 if (i == 0)
 902                                         tprintf("{");
 903                                 else
 904                                         tprintf(", ");
 905
 906                                 if (umove(tcp, (unsigned long)events, &event) != 0) {
 907                                         tprintf("{...}");
 908                                         continue;
 909                                 }
 910                                 tprintf("{%p, %p, %ld, %ld}", event.data,
 911                                         event.obj, event.res, event.res2);
 912                         }
 913                         tprintf("}, ");
 914 #else
 915                                 tprintf("{...}");
 916 #endif
 917                 }
 918
 919                 print_timespec(tcp, tcp->u_arg[4]);
 920         }
 921         return 0;
 922 }
 923 #endif /* LINUX */
 924
 925 int
 926 sys_select(struct tcb *tcp)
 927 {
 928         return decode_select(tcp, tcp->u_arg, BITNESS_CURRENT);
 929 }
 930
 931 #ifdef LINUX
 932 int
 933 sys_pselect6(struct tcb *tcp)
 934 {
 935         int rc = decode_select(tcp, tcp->u_arg, BITNESS_CURRENT);
 936         if (entering(tcp)) {
 937                 struct {
 938                         void *ss;
 939                         unsigned long len;
 940                 } data;
 941                 if (umove(tcp, tcp->u_arg[5], &data) < 0)
 942                         tprintf(", %#lx", tcp->u_arg[5]);
 943                 else {
 944                         tprintf(", {");
 945                         if (data.len < sizeof(long))
 946                                 tprintf("%#lx", (long)data.ss);
 947                         else
 948                                 print_sigset(tcp, (long)data.ss, 0);
 949                         tprintf(", %lu}", data.len);
 950                 }
 951         }
 952         return rc;
 953 }
 954
 955 static int
 956 do_eventfd(struct tcb *tcp, int flags_arg)
 957 {
 958         if (entering(tcp)) {
 959                 tprintf("%lu", tcp->u_arg[0]);
 960                 if (flags_arg >= 0) {
 961                         tprintf(", ");
 962                         printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
 963                 }
 964         }
 965         return 0;
 966 }
 967
 968 int
 969 sys_eventfd(struct tcb *tcp)
 970 {
 971         return do_eventfd(tcp, -1);
 972 }
 973
 974 int
 975 sys_eventfd2(struct tcb *tcp)
 976 {
 977         return do_eventfd(tcp, 1);
 978 }
 979 #endif