From 9d4a16eefe9d579d0c4eafaa3124f78c7ad526ec Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Thu, 17 Jan 2013 14:19:58 +0100
Subject: [PATCH] linux: add futimes() fallback

The utimensat() syscall was added in 2.6.22. Add a fallback mode for
older kernels that uses utimes("/proc/self/fd/<fd>").

Fixes #687.
---
 src/unix/fs.c | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/src/unix/fs.c b/src/unix/fs.c
index f01c83b4..eaccb294 100644
--- a/src/unix/fs.c
+++ b/src/unix/fs.c
@@ -113,12 +113,39 @@ static ssize_t uv__fs_futime(uv_fs_t* req) {
   /* utimesat() has nanosecond resolution but we stick to microseconds
    * for the sake of consistency with other platforms.
    */
+  static int no_utimesat;
   struct timespec ts[2];
+  struct timeval tv[2];
+  char path[sizeof("/proc/self/fd/") + 3 * sizeof(int)];
+  int r;
+
+  if (no_utimesat)
+    goto skip;
+
   ts[0].tv_sec  = req->atime;
   ts[0].tv_nsec = (unsigned long)(req->atime * 1000000) % 1000000 * 1000;
   ts[1].tv_sec  = req->mtime;
   ts[1].tv_nsec = (unsigned long)(req->mtime * 1000000) % 1000000 * 1000;
-  return uv__utimesat(req->file, NULL, ts, 0);
+
+  r = uv__utimesat(req->file, NULL, ts, 0);
+  if (r == 0)
+    return r;
+
+  if (errno != ENOSYS)
+    return r;
+
+  no_utimesat = 1;
+
+skip:
+
+  tv[0].tv_sec  = req->atime;
+  tv[0].tv_usec = (unsigned long)(req->atime * 1000000) % 1000000;
+  tv[1].tv_sec  = req->mtime;
+  tv[1].tv_usec = (unsigned long)(req->mtime * 1000000) % 1000000;
+  snprintf(path, sizeof(path), "/proc/self/fd/%d", (int) req->file);
+
+  return utimes(path, tv);
+
 #elif defined(__APPLE__)                                                      \
     || defined(__DragonFly__)                                                 \
     || defined(__FreeBSD__)                                                   \