From: Lukasz Majewski <lukma@denx.de>
Date: Sun, 16 Feb 2020 22:02:05 +0000 (+0100)
Subject: y2038: linux: Provide __lutimes64 implementation
X-Git-Tag: upstream/2.34~2112
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1a5e12826c02bce330be3f3592c5405314495d66;p=platform%2Fupstream%2Fglibc.git

y2038: linux: Provide __lutimes64 implementation

This conversion patch for supporting 64 bit time for lutimes mostly differs from
the work performed for futimes (when providing __futimes64) with adding the
AT_SYMLINK_NOFOLLOW flag to utimensat.
It also supports passing file name instead of file descriptor number, but this
is not relevant for utimensat used to implement it.

All the design and conversion decisions are exactly the same as for futimens
conversion.
---

diff --git a/include/time.h b/include/time.h
index 30c8e3d..033be25 100644
--- a/include/time.h
+++ b/include/time.h
@@ -207,10 +207,13 @@ libc_hidden_proto (__utimensat64_helper);
 
 #if __TIMESIZE == 64
 # define __futimes64 __futimes
+# define __lutimes64 __lutimes
 # define __futimens64 __futimens
 #else
 extern int __futimes64 (int fd, const struct __timeval64 tvp64[2]);
 libc_hidden_proto (__futimes64);
+extern int __lutimes64 (const char *file, const struct __timeval64 tvp64[2]);
+libc_hidden_proto (__lutimes64);
 extern int __futimens64 (int fd, const struct __timespec64 tsp[2]);
 libc_hidden_proto (__futimens64);
 #endif
diff --git a/sysdeps/unix/sysv/linux/lutimes.c b/sysdeps/unix/sysv/linux/lutimes.c
index 59ab1f0..778e4e6 100644
--- a/sysdeps/unix/sysv/linux/lutimes.c
+++ b/sysdeps/unix/sysv/linux/lutimes.c
@@ -20,25 +20,36 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <time.h>
-#include <sys/time.h>
-#include <sysdep.h>
 
+int
+__lutimes64 (const char *file, const struct __timeval64 tvp64[2])
+{
+  struct __timespec64 ts64[2];
+  if (tvp64 != NULL)
+    {
+      ts64[0] = timeval64_to_timespec64 (tvp64[0]);
+      ts64[1] = timeval64_to_timespec64 (tvp64[1]);
+    }
+
+  return __utimensat64_helper (AT_FDCWD, file, tvp64 ? &ts64[0] : NULL,
+                               AT_SYMLINK_NOFOLLOW);
+}
+
+#if __TIMESIZE != 64
+libc_hidden_def (__lutimes64)
 
 int
-lutimes (const char *file, const struct timeval tvp[2])
+__lutimes (const char *file, const struct timeval tvp[2])
 {
-  /* The system call espects timespec, not timeval.  */
-  struct timespec ts[2];
+  struct __timeval64 tv64[2];
+
   if (tvp != NULL)
     {
-      if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
-          || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
-	return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
-
-      TIMEVAL_TO_TIMESPEC (&tvp[0], &ts[0]);
-      TIMEVAL_TO_TIMESPEC (&tvp[1], &ts[1]);
+      tv64[0] = valid_timeval_to_timeval64 (tvp[0]);
+      tv64[1] = valid_timeval_to_timeval64 (tvp[1]);
     }
 
-  return INLINE_SYSCALL (utimensat, 4, AT_FDCWD, file, tvp ? ts : NULL,
-			 AT_SYMLINK_NOFOLLOW);
+  return __lutimes64 (file, tvp ? &tv64[0] : NULL);
 }
+#endif
+weak_alias (__lutimes, lutimes)