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

   1 /*
   2  * Copyright (c) 2015 Etienne Gemsa <etienne.gemsa@lse.epita.fr>
   3  * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
   4  * Copyright (c) 2015-2018 The strace developers.
   5  * All rights reserved.
   6  *
   7  * SPDX-License-Identifier: LGPL-2.1-or-later
   8  */
   9
  10 #include "defs.h"
  11
  12 #ifdef HAVE_LINUX_INPUT_H
  13
  14 # include DEF_MPERS_TYPE(struct_ff_effect)
  15
  16 # include <linux/ioctl.h>
  17 # include <linux/input.h>
  18
  19 typedef struct ff_effect struct_ff_effect;
  20
  21 #endif /* HAVE_LINUX_INPUT_H */
  22
  23 #include MPERS_DEFS
  24
  25 #ifdef HAVE_LINUX_INPUT_H
  26
  27 static void
  28 decode_envelope(void *const data)
  29 {
  30         const struct ff_envelope *const envelope = data;
  31
  32         tprintf(", envelope={attack_length=%" PRIu16
  33                 ", attack_level=%" PRIu16
  34                 ", fade_length=%" PRIu16
  35                 ", fade_level=%#x}",
  36                 envelope->attack_length,
  37                 envelope->attack_level,
  38                 envelope->fade_length,
  39                 envelope->fade_level);
  40 }
  41
  42 static int
  43 ff_effect_ioctl(struct tcb *const tcp, const kernel_ulong_t arg)
  44 {
  45         tprints(", ");
  46
  47         struct_ff_effect ffe;
  48
  49         if (umove_or_printaddr(tcp, arg, &ffe))
  50                 return RVAL_IOCTL_DECODED;
  51
  52         tprints("{type=");
  53         print_evdev_ff_type(ffe.type);
  54         tprintf(", id=%" PRIu16
  55                 ", direction=%" PRIu16 ", ",
  56                 ffe.id,
  57                 ffe.direction);
  58
  59         if (abbrev(tcp)) {
  60                 tprints("...}");
  61                 return RVAL_IOCTL_DECODED;
  62         }
  63
  64         tprintf("trigger={button=%" PRIu16
  65                 ", interval=%" PRIu16 "}"
  66                 ", replay={length=%" PRIu16
  67                 ", delay=%" PRIu16 "}",
  68                 ffe.trigger.button,
  69                 ffe.trigger.interval,
  70                 ffe.replay.length,
  71                 ffe.replay.delay);
  72
  73         switch (ffe.type) {
  74                 case FF_CONSTANT:
  75                         tprintf(", constant={level=%" PRId16,
  76                                 ffe.u.constant.level);
  77                         decode_envelope(&ffe.u.constant.envelope);
  78                         tprints("}");
  79                         break;
  80                 case FF_RAMP:
  81                         tprintf(", ramp={start_level=%" PRId16
  82                                 ", end_level=%" PRId16,
  83                                 ffe.u.ramp.start_level,
  84                                 ffe.u.ramp.end_level);
  85                         decode_envelope(&ffe.u.ramp.envelope);
  86                         tprints("}");
  87                         break;
  88                 case FF_PERIODIC:
  89                         tprintf(", periodic={waveform=%" PRIu16
  90                                 ", period=%" PRIu16
  91                                 ", magnitude=%" PRId16
  92                                 ", offset=%" PRId16
  93                                 ", phase=%" PRIu16,
  94                                 ffe.u.periodic.waveform,
  95                                 ffe.u.periodic.period,
  96                                 ffe.u.periodic.magnitude,
  97                                 ffe.u.periodic.offset,
  98                                 ffe.u.periodic.phase);
  99                         decode_envelope(&ffe.u.periodic.envelope);
 100                         tprintf(", custom_len=%u, custom_data=",
 101                                 ffe.u.periodic.custom_len);
 102                         printaddr(ptr_to_kulong(ffe.u.periodic.custom_data));
 103                         tprints("}");
 104                         break;
 105                 case FF_RUMBLE:
 106                         tprintf(", rumble={strong_magnitude=%" PRIu16
 107                                 ", weak_magnitude=%" PRIu16 "}",
 108                                 ffe.u.rumble.strong_magnitude,
 109                                 ffe.u.rumble.weak_magnitude);
 110                         break;
 111                 default:
 112                         break;
 113         }
 114
 115         tprints("}");
 116
 117         return RVAL_IOCTL_DECODED;
 118 }
 119
 120 MPERS_PRINTER_DECL(int, evdev_write_ioctl_mpers, struct tcb *const tcp,
 121                    const unsigned int code, const kernel_ulong_t arg)
 122 {
 123         switch (code) {
 124                 case EVIOCSFF:
 125                         return ff_effect_ioctl(tcp, arg);
 126                 default:
 127                         return RVAL_DECODED;
 128         }
 129 }
 130
 131 #endif /* HAVE_LINUX_INPUT_H */