granicus.if.org Git - strace/blob - ioctl.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) 1996-2001 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
  31 #include "defs.h"
  32 #include <asm/ioctl.h>
  33 #include "xlat/ioctl_dirs.h"
  34
  35 #ifdef HAVE_LINUX_INPUT_H
  36 # include <linux/input.h>
  37 #endif
  38
  39 #include "xlat/evdev_abs.h"
  40 #include "xlat/evdev_ev.h"
  41
  42 static int
  43 compare(const void *a, const void *b)
  44 {
  45         const unsigned int code1 = (const unsigned long) a;
  46         const unsigned int code2 = ((struct_ioctlent *) b)->code;
  47         return (code1 > code2) ? 1 : (code1 < code2) ? -1 : 0;
  48 }
  49
  50 const struct_ioctlent *
  51 ioctl_lookup(const unsigned int code)
  52 {
  53         struct_ioctlent *iop;
  54
  55         iop = bsearch((const void *) (const unsigned long) code, ioctlent,
  56                         nioctlents, sizeof(ioctlent[0]), compare);
  57         while (iop > ioctlent) {
  58                 iop--;
  59                 if (iop->code != code) {
  60                         iop++;
  61                         break;
  62                 }
  63         }
  64         return iop;
  65 }
  66
  67 const struct_ioctlent *
  68 ioctl_next_match(const struct_ioctlent *iop)
  69 {
  70         const unsigned int code = iop->code;
  71         iop++;
  72         if (iop < ioctlent + nioctlents && iop->code == code)
  73                 return iop;
  74         return NULL;
  75 }
  76
  77 void
  78 ioctl_print_code(const unsigned int code)
  79 {
  80         tprints("_IOC(");
  81         printflags(ioctl_dirs, _IOC_DIR(code), "_IOC_???");
  82         tprintf(", 0x%02x, 0x%02x, 0x%02x)",
  83                 _IOC_TYPE(code), _IOC_NR(code), _IOC_SIZE(code));
  84 }
  85
  86 static int
  87 evdev_decode_number(unsigned int arg)
  88 {
  89         unsigned int nr = _IOC_NR(arg);
  90
  91         if (_IOC_DIR(arg) == _IOC_WRITE) {
  92                 if (nr >= 0xc0 && nr <= 0xc0 + 0x3f) {
  93                         tprints("EVIOCSABS(");
  94                         printxval(evdev_abs, nr - 0xc0, "EV_???");
  95                         tprints(")");
  96                         return 1;
  97                 }
  98         }
  99
 100         if (_IOC_DIR(arg) != _IOC_READ)
 101                 return 0;
 102
 103         if (nr >= 0x20 && nr <= 0x20 + 0x1f) {
 104                 tprints("EVIOCGBIT(");
 105                 printxval(evdev_ev, nr - 0x20, "EV_???");
 106                 tprintf(", %u)", _IOC_SIZE(arg));
 107                 return 1;
 108         } else if (nr >= 0x40 && nr <= 0x40 + 0x3f) {
 109                 tprints("EVIOCGABS(");
 110                 printxval(evdev_abs, nr - 0x40, "ABS_???");
 111                 tprints(")");
 112                 return 1;
 113         }
 114
 115         switch (_IOC_NR(nr)) {
 116                 case 0x06:
 117                         tprintf("EVIOCGNAME(%u)", _IOC_SIZE(arg));
 118                         return 1;
 119                 case 0x07:
 120                         tprintf("EVIOCGPHYS(%u)", _IOC_SIZE(arg));
 121                         return 1;
 122                 case 0x08:
 123                         tprintf("EVIOCGUNIQ(%u)", _IOC_SIZE(arg));
 124                         return 1;
 125                 case 0x09:
 126                         tprintf("EVIOCGPROP(%u)", _IOC_SIZE(arg));
 127                         return 1;
 128                 case 0x0a:
 129                         tprintf("EVIOCGMTSLOTS(%u)", _IOC_SIZE(arg));
 130                         return 1;
 131                 case 0x18:
 132                         tprintf("EVIOCGKEY(%u)", _IOC_SIZE(arg));
 133                         return 1;
 134                 case 0x19:
 135                         tprintf("EVIOCGLED(%u)", _IOC_SIZE(arg));
 136                         return 1;
 137                 case 0x1a:
 138                         tprintf("EVIOCGSND(%u)", _IOC_SIZE(arg));
 139                         return 1;
 140                 case 0x1b:
 141                         tprintf("EVIOCGSW(%u)", _IOC_SIZE(arg));
 142                         return 1;
 143                 default:
 144                         return 0;
 145         }
 146 }
 147
 148 static int
 149 hiddev_decode_number(unsigned int arg)
 150 {
 151         if (_IOC_DIR(arg) == _IOC_READ) {
 152                 switch (_IOC_NR(arg)) {
 153                         case 0x04:
 154                                 tprintf("HIDIOCGRAWNAME(%u)", _IOC_SIZE(arg));
 155                                 return 1;
 156                         case 0x05:
 157                                 tprintf("HIDIOCGRAWPHYS(%u)", _IOC_SIZE(arg));
 158                                 return 1;
 159                         case 0x06:
 160                                 tprintf("HIDIOCSFEATURE(%u)", _IOC_SIZE(arg));
 161                                 return 1;
 162                         case 0x12:
 163                                 tprintf("HIDIOCGPHYS(%u)", _IOC_SIZE(arg));
 164                                 return 1;
 165                         default:
 166                                 return 0;
 167                 }
 168         } else if (_IOC_DIR(arg) == (_IOC_READ | _IOC_WRITE)) {
 169                 switch (_IOC_NR(arg)) {
 170                         case 0x06:
 171                                 tprintf("HIDIOCSFEATURE(%u)", _IOC_SIZE(arg));
 172                                 return 1;
 173                         case 0x07:
 174                                 tprintf("HIDIOCGFEATURE(%u)", _IOC_SIZE(arg));
 175                                 return 1;
 176                         default:
 177                                 return 0;
 178                 }
 179         }
 180
 181         return 0;
 182 }
 183
 184 int
 185 ioctl_decode_command_number(unsigned int arg)
 186 {
 187         switch (_IOC_TYPE(arg)) {
 188                 case 'E':
 189                         return evdev_decode_number(arg);
 190                 case 'H':
 191                         return hiddev_decode_number(arg);
 192                 case 'M':
 193                         if (_IOC_DIR(arg) == _IOC_WRITE) {
 194                                 tprintf("MIXER_WRITE(%u)", _IOC_NR(arg));
 195                                 return 1;
 196                         } else if (_IOC_DIR(arg) == _IOC_READ) {
 197                                 tprintf("MIXER_READ(%u)", _IOC_NR(arg));
 198                                 return 1;
 199                         }
 200                         return 0;
 201                 case 'U':
 202                         if (_IOC_DIR(arg) == _IOC_READ && _IOC_NR(arg) == 0x2c) {
 203                                 tprintf("UI_GET_SYSNAME(%u)", _IOC_SIZE(arg));
 204                                 return 1;
 205                         }
 206                         return 0;
 207                 case 'j':
 208                         if (_IOC_DIR(arg) == _IOC_READ && _IOC_NR(arg) == 0x13) {
 209                                 tprintf("JSIOCGNAME(%u)", _IOC_SIZE(arg));
 210                                 return 1;
 211                         }
 212                         return 0;
 213                 case 'k':
 214                         if (_IOC_DIR(arg) == _IOC_WRITE && _IOC_NR(arg) == 0) {
 215                                 tprintf("SPI_IOC_MESSAGE(%u)", _IOC_SIZE(arg));
 216                                 return 1;
 217                         }
 218                         return 0;
 219                 default:
 220                         return 0;
 221         }
 222 }
 223
 224 int
 225 ioctl_decode(struct tcb *tcp, unsigned int code, long arg)
 226 {
 227         switch (_IOC_TYPE(code)) {
 228 #if defined(ALPHA) || defined(POWERPC)
 229         case 'f': case 't': case 'T':
 230 #else /* !ALPHA */
 231         case 0x54:
 232 #endif /* !ALPHA */
 233                 return term_ioctl(tcp, code, arg);
 234         case 0x89:
 235                 return sock_ioctl(tcp, code, arg);
 236         case 'p':
 237                 return rtc_ioctl(tcp, code, arg);
 238         case 0x03:
 239         case 0x12:
 240         case 'X':
 241                 return block_ioctl(tcp, code, arg);
 242 #ifdef HAVE_SCSI_SG_H
 243         case 0x22:
 244                 return scsi_ioctl(tcp, code, arg);
 245 #endif
 246         case 'L':
 247                 return loop_ioctl(tcp, code, arg);
 248         case 'M':
 249                 return mtd_ioctl(tcp, code, arg);
 250         case 'o':
 251         case 'O':
 252                 return ubi_ioctl(tcp, code, arg);
 253         case 'V':
 254                 return v4l2_ioctl(tcp, code, arg);
 255         case '=':
 256                 return ptp_ioctl(tcp, code, arg);
 257 #ifdef HAVE_LINUX_INPUT_H
 258         case 'E':
 259                 return evdev_ioctl(tcp, code, arg);
 260 #endif
 261         default:
 262                 break;
 263         }
 264         return 0;
 265 }
 266
 267 /*
 268  * Registry of ioctl characters, culled from
 269  *      @(#)ioccom.h 1.7 89/06/16 SMI; from UCB ioctl.h 7.1 6/4/86
 270  *
 271  * char file where defined              notes
 272  * ---- ------------------              -----
 273  *   F  sun/fbio.h
 274  *   G  sun/gpio.h
 275  *   H  vaxif/if_hy.h
 276  *   M  sundev/mcpcmd.h                 *overlap*
 277  *   M  sys/modem.h                     *overlap*
 278  *   S  sys/stropts.h
 279  *   T  sys/termio.h                    -no overlap-
 280  *   T  sys/termios.h                   -no overlap-
 281  *   V  sundev/mdreg.h
 282  *   a  vaxuba/adreg.h
 283  *   d  sun/dkio.h                      -no overlap with sys/des.h-
 284  *   d  sys/des.h                       (possible overlap)
 285  *   d  vax/dkio.h                      (possible overlap)
 286  *   d  vaxuba/rxreg.h                  (possible overlap)
 287  *   f  sys/filio.h
 288  *   g  sunwindow/win_ioctl.h           -no overlap-
 289  *   g  sunwindowdev/winioctl.c         !no manifest constant! -no overlap-
 290  *   h  sundev/hrc_common.h
 291  *   i  sys/sockio.h                    *overlap*
 292  *   i  vaxuba/ikreg.h                  *overlap*
 293  *   k  sundev/kbio.h
 294  *   m  sundev/msio.h                   (possible overlap)
 295  *   m  sundev/msreg.h                  (possible overlap)
 296  *   m  sys/mtio.h                      (possible overlap)
 297  *   n  sun/ndio.h
 298  *   p  net/nit_buf.h                   (possible overlap)
 299  *   p  net/nit_if.h                    (possible overlap)
 300  *   p  net/nit_pf.h                    (possible overlap)
 301  *   p  sundev/fpareg.h                 (possible overlap)
 302  *   p  sys/sockio.h                    (possible overlap)
 303  *   p  vaxuba/psreg.h                  (possible overlap)
 304  *   q  sun/sqz.h
 305  *   r  sys/sockio.h
 306  *   s  sys/sockio.h
 307  *   t  sys/ttold.h                     (possible overlap)
 308  *   t  sys/ttycom.h                    (possible overlap)
 309  *   v  sundev/vuid_event.h             *overlap*
 310  *   v  sys/vcmd.h                      *overlap*
 311  *   V  linux/videodev2.h
 312  *
 313  * End of Registry
 314  */