Y2038: add function __setitimer64

3 files changed, 73 insertions, 1 deletions

diff --git a/time/Makefile b/time/Makefile
index b1b026d163..4798cfe016 100644
--- a/time/Makefile
+++ b/time/Makefile
@@ -35,7 +35,7 @@ routines := offtime asctime clock ctime ctime_r difftime \
 	    gettimeofday settimeofday adjtime tzset	 \
 	    gettimeofday64 settimeofday64		 \
 	    tzfile getitimer setitimer			 \
-	    getitimer64					 \
+	    getitimer64 setitimer64			 \
 	    stime dysize timegm ftime			 \
 	    getdate strptime strptime_l			 \
 	    strftime wcsftime strftime_l wcsftime_l	 \
diff --git a/time/Versions b/time/Versions
index b97d3f8449..4249655d70 100644
--- a/time/Versions
+++ b/time/Versions
@@ -91,5 +91,6 @@ libc {
     __utimes64;
     __adjtime64;
     __getitimer64;
+    __setitimer64;
   }
 }
diff --git a/time/setitimer64.c b/time/setitimer64.c
new file mode 100644
index 0000000000..d9f2a03b3a
--- /dev/null
+++ b/time/setitimer64.c
@@ -0,0 +1,71 @@
+/* Set an interval timer
+
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stddef.h>
+#include <errno.h>
+#include <sys/time.h>
+
+extern int __y2038_linux_support;
+
+/* Set the timer WHICH to *NEW.  If OLD is not NULL,
+   set *OLD to the old value of timer WHICH.
+   Returns 0 on success, -1 on errors.  */
+int
+__setitimer64 (enum __itimer_which which,
+                 const struct __itimerval64 *new,
+                 struct __itimerval64 *old)
+{
+  struct itimerval new32, *new32p = NULL;
+  struct itimerval old32, *old32p = NULL;
+
+  if (__y2038_linux_support)
+    {
+      /* TODO: use 64-bit syscall */
+    }
+
+  if (new != NULL)
+    {
+      if (new->it_interval.tv_sec > INT_MAX ||
+          new->it_value.tv_sec > INT_MAX)
+        {
+          __set_errno (EOVERFLOW);
+          return -1;
+        }
+      new32.it_interval.tv_sec = new->it_interval.tv_sec;
+      new32.it_interval.tv_usec = new->it_interval.tv_usec;
+      new32.it_value.tv_sec = new->it_value.tv_sec;
+      new32.it_value.tv_usec = new->it_value.tv_usec;
+      new32p = &new32;
+    }
+
+  if (old != NULL)
+    old32p = &old32;
+
+  int result = __setitimer(which, new32p, old32p);
+
+  if (old)
+    {
+      old->it_interval.tv_sec = old32.it_interval.tv_sec;
+      old->it_interval.tv_usec = old32.it_interval.tv_usec;
+      old->it_value.tv_sec = old32.it_value.tv_sec;
+      old->it_value.tv_usec = old32.it_value.tv_usec;
+    }
+
+  return result;
+}