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

   1 /*
   2  * Copyright (c) 2004 Ulrich Drepper <drepper@redhat.com>
   3  * Copyright (c) 2004-2016 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 #include DEF_MPERS_TYPE(struct_rtc_pll_info)
  13
  14 #include <linux/ioctl.h>
  15 #include <linux/rtc.h>
  16
  17 typedef struct rtc_pll_info struct_rtc_pll_info;
  18
  19 #include MPERS_DEFS
  20
  21 static void
  22 print_rtc_time(struct tcb *tcp, const struct rtc_time *rt)
  23 {
  24         tprintf("{tm_sec=%d, tm_min=%d, tm_hour=%d, "
  25                 "tm_mday=%d, tm_mon=%d, tm_year=%d, ",
  26                 rt->tm_sec, rt->tm_min, rt->tm_hour,
  27                 rt->tm_mday, rt->tm_mon, rt->tm_year);
  28         if (!abbrev(tcp))
  29                 tprintf("tm_wday=%d, tm_yday=%d, tm_isdst=%d}",
  30                         rt->tm_wday, rt->tm_yday, rt->tm_isdst);
  31         else
  32                 tprints("...}");
  33 }
  34
  35 static void
  36 decode_rtc_time(struct tcb *const tcp, const kernel_ulong_t addr)
  37 {
  38         struct rtc_time rt;
  39
  40         if (!umove_or_printaddr(tcp, addr, &rt))
  41                 print_rtc_time(tcp, &rt);
  42 }
  43
  44 static void
  45 decode_rtc_wkalrm(struct tcb *const tcp, const kernel_ulong_t addr)
  46 {
  47         struct rtc_wkalrm wk;
  48
  49         if (!umove_or_printaddr(tcp, addr, &wk)) {
  50                 tprintf("{enabled=%d, pending=%d, time=", wk.enabled, wk.pending);
  51                 print_rtc_time(tcp, &wk.time);
  52                 tprints("}");
  53         }
  54 }
  55
  56 static void
  57 decode_rtc_pll_info(struct tcb *const tcp, const kernel_ulong_t addr)
  58 {
  59         struct_rtc_pll_info pll;
  60
  61         if (!umove_or_printaddr(tcp, addr, &pll))
  62                 tprintf("{pll_ctrl=%d, pll_value=%d, pll_max=%d, pll_min=%d"
  63                         ", pll_posmult=%d, pll_negmult=%d, pll_clock=%ld}",
  64                         pll.pll_ctrl, pll.pll_value, pll.pll_max, pll.pll_min,
  65                         pll.pll_posmult, pll.pll_negmult, (long) pll.pll_clock);
  66 }
  67
  68 MPERS_PRINTER_DECL(int, rtc_ioctl, struct tcb *const tcp,
  69                    const unsigned int code, const kernel_ulong_t arg)
  70 {
  71         switch (code) {
  72         case RTC_ALM_READ:
  73         case RTC_RD_TIME:
  74                 if (entering(tcp))
  75                         return 0;
  76                 ATTRIBUTE_FALLTHROUGH;
  77         case RTC_ALM_SET:
  78         case RTC_SET_TIME:
  79                 tprints(", ");
  80                 decode_rtc_time(tcp, arg);
  81                 break;
  82         case RTC_IRQP_SET:
  83         case RTC_EPOCH_SET:
  84                 tprintf(", %" PRI_klu, arg);
  85                 break;
  86         case RTC_IRQP_READ:
  87         case RTC_EPOCH_READ:
  88                 if (entering(tcp))
  89                         return 0;
  90                 tprints(", ");
  91                 printnum_ulong(tcp, arg);
  92                 break;
  93         case RTC_WKALM_RD:
  94                 if (entering(tcp))
  95                         return 0;
  96                 ATTRIBUTE_FALLTHROUGH;
  97         case RTC_WKALM_SET:
  98                 tprints(", ");
  99                 decode_rtc_wkalrm(tcp, arg);
 100                 break;
 101         case RTC_PLL_GET:
 102                 if (entering(tcp))
 103                         return 0;
 104                 ATTRIBUTE_FALLTHROUGH;
 105         case RTC_PLL_SET:
 106                 tprints(", ");
 107                 decode_rtc_pll_info(tcp, arg);
 108                 break;
 109 #ifdef RTC_VL_READ
 110         case RTC_VL_READ:
 111                 if (entering(tcp))
 112                         return 0;
 113                 tprints(", ");
 114                 printnum_int(tcp, arg, "%d");
 115                 break;
 116 #endif
 117         case RTC_AIE_ON:
 118         case RTC_AIE_OFF:
 119         case RTC_UIE_ON:
 120         case RTC_UIE_OFF:
 121         case RTC_PIE_ON:
 122         case RTC_PIE_OFF:
 123         case RTC_WIE_ON:
 124         case RTC_WIE_OFF:
 125 #ifdef RTC_VL_CLR
 126         case RTC_VL_CLR:
 127 #endif
 128                 /* no args */
 129                 break;
 130         default:
 131                 return RVAL_DECODED;
 132         }
 133
 134         return RVAL_IOCTL_DECODED;
 135 }