From 4a5f3bbd51e8fa0b3abe6ecdfcbf353d1f944199 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Mon, 6 Feb 2012 17:26:34 +0100
Subject: [PATCH] eio: don't use futimes() on linux

uclibc does not provide the syscall wrapper. Translate it into a direct utimesat
syscall if available, else fail with ENOSYS.
---
 src/unix/eio/config_linux.h | 7 +++++--
 src/unix/eio/eio.c          | 7 +++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/unix/eio/config_linux.h b/src/unix/eio/config_linux.h
index 606301fa..e7a0d6e7 100644
--- a/src/unix/eio/config_linux.h
+++ b/src/unix/eio/config_linux.h
@@ -13,8 +13,8 @@
 /* utimes(2) is available */
 #define HAVE_UTIMES 1
 
-/* futimes(2) is available */
-#define HAVE_FUTIMES 1
+/* futimes(2) is available but we make the syscall directly. */
+#undef HAVE_FUTIMES
 
 /* Define to 1 if you have the <inttypes.h> header file. */
 #define HAVE_INTTYPES_H 1
@@ -56,6 +56,9 @@
 /* Define to 1 if you have the <sys/types.h> header file. */
 #define HAVE_SYS_TYPES_H 1
 
+/* Define to 1 if you have the <sys/syscall.h> header file. */
+#define HAVE_SYS_SYSCALL_H 1
+
 /* Define to 1 if you have the <unistd.h> header file. */
 #define HAVE_UNISTD_H 1
 
diff --git a/src/unix/eio/eio.c b/src/unix/eio/eio.c
index 58300a65..248af9e2 100644
--- a/src/unix/eio/eio.c
+++ b/src/unix/eio/eio.c
@@ -1039,8 +1039,15 @@ eio__utimes (const char *filename, const struct timeval times[2])
 static int
 eio__futimes (int fd, const struct timeval tv[2])
 {
+#if defined(__linux) && defined(__NR_utimensat)
+  struct timespec ts[2];
+  ts[0].tv_sec = tv[0].tv_sec, ts[0].tv_nsec = tv[0].tv_usec * 1000;
+  ts[1].tv_sec = tv[1].tv_sec, ts[1].tv_nsec = tv[1].tv_usec * 1000;
+  return syscall(__NR_utimensat, fd, NULL, ts, 0);
+#else
   errno = ENOSYS;
   return -1;
+#endif
 }
 
 #endif