sysdeps/unix/sysv/linux/timer_settime.c

   1 /* Copyright (C) 2003-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation; either version 2.1 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If
  16    not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <stdlib.h>
  20 #include <time.h>
  21 #include <sysdep.h>
  22 #include <kernel-features.h>
  23 #include "kernel-posix-timers.h"
  24 #include <shlib-compat.h>
  25
  26 #if !TIMER_T_WAS_INT_COMPAT
  27 int
  28 ___timer_settime64 (timer_t timerid, int flags,
  29                    const struct __itimerspec64 *value,
  30                    struct __itimerspec64 *ovalue)
  31 {
  32   kernel_timer_t ktimerid = timerid_to_kernel_timer (timerid);
  33
  34 # ifdef __ASSUME_TIME64_SYSCALLS
  35 #  ifndef __NR_timer_settime64
  36 #   define __NR_timer_settime64 __NR_timer_settime
  37 #  endif
  38   return INLINE_SYSCALL_CALL (timer_settime64, ktimerid, flags, value,
  39                               ovalue);
  40 # else
  41 #  ifdef __NR_timer_settime64
  42   int ret = INLINE_SYSCALL_CALL (timer_settime64, ktimerid, flags, value,
  43                                  ovalue);
  44   if (ret == 0 || errno != ENOSYS)
  45     return ret;
  46 #  endif
  47   struct itimerspec its32, oits32;
  48
  49   if (! in_time_t_range ((value->it_value).tv_sec)
  50       || ! in_time_t_range ((value->it_interval).tv_sec))
  51     {
  52       __set_errno (EOVERFLOW);
  53       return -1;
  54     }
  55
  56   its32.it_interval = valid_timespec64_to_timespec (value->it_interval);
  57   its32.it_value = valid_timespec64_to_timespec (value->it_value);
  58
  59   int retval = INLINE_SYSCALL_CALL (timer_settime, ktimerid, flags,
  60                                     &its32, ovalue ? &oits32 : NULL);
  61   if (retval == 0 && ovalue)
  62     {
  63       ovalue->it_interval = valid_timespec_to_timespec64 (oits32.it_interval);
  64       ovalue->it_value = valid_timespec_to_timespec64 (oits32.it_value);
  65     }
  66
  67   return retval;
  68 # endif
  69 }
  70
  71 # if __TIMESIZE == 64
  72 versioned_symbol (libc, ___timer_settime64, timer_settime, GLIBC_2_34);
  73 #  if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_34)
  74 compat_symbol (librt, ___timer_settime64, timer_settime, GLIBC_2_2);
  75 #  endif
  76
  77 #else /* __TIMESIZE != 64 */
  78 libc_hidden_ver (___timer_settime64, __timer_settime64)
  79 versioned_symbol (libc, ___timer_settime64, __timer_settime64, GLIBC_2_34);
  80
  81 int
  82 __timer_settime (timer_t timerid, int flags, const struct itimerspec *value,
  83                  struct itimerspec *ovalue)
  84 {
  85   struct __itimerspec64 its64, oits64;
  86   int retval;
  87
  88   its64.it_interval = valid_timespec_to_timespec64 (value->it_interval);
  89   its64.it_value = valid_timespec_to_timespec64 (value->it_value);
  90
  91   retval = __timer_settime64 (timerid, flags, &its64, ovalue ? &oits64 : NULL);
  92   if (retval == 0 && ovalue)
  93     {
  94       ovalue->it_interval = valid_timespec64_to_timespec (oits64.it_interval);
  95       ovalue->it_value = valid_timespec64_to_timespec (oits64.it_value);
  96     }
  97
  98   return retval;
  99 }
 100 versioned_symbol (libc, __timer_settime, timer_settime, GLIBC_2_34);
 101
 102 #  if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_34)
 103 compat_symbol (librt, __timer_settime, timer_settime, GLIBC_2_2);
 104 #  endif
 105 # endif /* __TIMESIZE != 64 */
 106
 107 #else /* TIMER_T_WAS_INT_COMPAT */
 108
 109 extern __typeof (timer_settime) __timer_settime_new;
 110 libc_hidden_proto (__timer_settime_new)
 111
 112 int
 113 ___timer_settime_new (timer_t timerid, int flags,
 114                       const struct itimerspec *value,
 115                       struct itimerspec *ovalue)
 116 {
 117   kernel_timer_t ktimerid = timerid_to_kernel_timer (timerid);
 118
 119   return INLINE_SYSCALL_CALL (timer_settime, ktimerid, flags, value, ovalue);
 120 }
 121 versioned_symbol (libc, ___timer_settime_new, timer_settime, GLIBC_2_34);
 122 libc_hidden_ver (___timer_settime_new, __timer_settime_new)
 123
 124 # if OTHER_SHLIB_COMPAT (librt, GLIBC_2_3_3, GLIBC_2_34)
 125 compat_symbol (librt, ___timer_settime_new, timer_settime, GLIBC_2_3_3);
 126 # endif
 127
 128 # if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_3_3)
 129 int
 130 __timer_settime_old (int timerid, int flags, const struct itimerspec *value,
 131                      struct itimerspec *ovalue)
 132 {
 133   return __timer_settime_new (__timer_compat_list[timerid], flags,
 134                               value, ovalue);
 135 }
 136 compat_symbol (librt, __timer_settime_old, timer_settime, GLIBC_2_2);
 137 # endif
 138
 139 #endif /* TIMER_T_WAS_INT_COMPAT */