diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/adjtime.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/adjtime.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/adjtime.c b/sysdeps/unix/sysv/linux/adjtime.c new file mode 100644 index 0000000000..3673cd9164 --- /dev/null +++ b/sysdeps/unix/sysv/linux/adjtime.c @@ -0,0 +1,69 @@ +/* Copyright (C) 1995 Free Software Foundation, Inc. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <limits.h> +#include <sys/time.h> +#include <sys/timex.h> + +#define MAX_SEC (LONG_MAX / 1000000L - 2) +#define MIN_SEC (LONG_MIN / 1000000L + 2) + +int +__adjtime (itv, otv) + const struct timeval *itv; + struct timeval *otv; +{ + struct timex tntx; + + if (itv) + { + struct timeval tmp; + + /* We will do some check here. */ + tmp.tv_sec = itv->tv_sec + itv->tv_usec / 1000000L; + tmp.tv_usec = itv->tv_usec % 1000000L; + if (tmp.tv_sec > MAX_SEC || tmp.tv_sec < MIN_SEC) + { + errno = EINVAL; + return -1; + } + tntx.offset = tmp.tv_usec + tmp.tv_sec * 1000000L; + tntx.mode = ADJ_OFFSET_SINGLESHOT; + } + else + tntx.mode = 0; + + if (__adjtimex (&tntx) < 0) return -1; + + if (otv) + { + if (tntx.offset < 0) + { + otv->tv_usec = -(-tntx.offset % 1000000); + otv->tv_sec = -(-tntx.offset / 1000000); + } + else + { + otv->tv_usec = tntx.offset % 1000000; + otv->tv_sec = tntx.offset / 1000000; + } + } + return 0; +} + +weak_alias (__adjtime, adjtime) |