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Diffstat (limited to 'sysdeps/unix/sysv/linux/adjtime.c')
-rw-r--r--sysdeps/unix/sysv/linux/adjtime.c69
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)