login/logwtmp.c

   1 /* Copyright (C) 1996-2021 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
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <string.h>
  19 #include <sys/time.h>
  20 #include <time.h>
  21 #include <unistd.h>
  22 #include <utmp.h>
  23 #include <struct___timespec64.h>
  24 #include <shlib-compat.h>
  25
  26 void
  27 __logwtmp (const char *line, const char *name, const char *host)
  28 {
  29   struct utmp ut;
  30
  31   /* Set information in new entry.  */
  32   memset (&ut, 0, sizeof (ut));
  33   ut.ut_pid = getpid ();
  34   ut.ut_type = name[0] ? USER_PROCESS : DEAD_PROCESS;
  35   strncpy (ut.ut_line, line, sizeof ut.ut_line);
  36   strncpy (ut.ut_name, name, sizeof ut.ut_name);
  37   strncpy (ut.ut_host, host, sizeof ut.ut_host);
  38
  39   struct __timespec64 ts;
  40   __clock_gettime64 (CLOCK_REALTIME, &ts);
  41   TIMESPEC_TO_TIMEVAL (&ut.ut_tv, &ts);
  42
  43   __updwtmp (_PATH_WTMP, &ut);
  44 }
  45 versioned_symbol (libc, __logwtmp, logwtmp, GLIBC_2_34);
  46 libc_hidden_ver (__logwtmp, logwtmp)
  47
  48 #if OTHER_SHLIB_COMPAT (libutil, GLIBC_2_0, GLIBC_2_34)
  49 compat_symbol (libutil, __logwtmp, logwtmp, GLIBC_2_0);
  50 #endif