03/07: daemon: 'pathExists' uses 'statx' when available.

[guix-commits]

civodul pushed a commit to branch master
in repository guix.

commit b6b014bf42f68fcb71d37204328babb81e0e0855
Author: Ludovic Courtès <address@hidden>
Date:   Fri Nov 29 13:54:36 2019 +0100

    daemon: 'pathExists' uses 'statx' when available.
    
    * nix/libutil/util.cc (pathExists) [HAVE_STATX]: New code.
---
 nix/libutil/util.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/nix/libutil/util.cc b/nix/libutil/util.cc
index 8093b4c..faba378 100644
--- a/nix/libutil/util.cc
+++ b/nix/libutil/util.cc
@@ -177,8 +177,13 @@ struct stat lstat(const Path & path)
 bool pathExists(const Path & path)
 {
     int res;
+#ifdef HAVE_STATX
+    struct statx st;
+    res = statx(AT_FDCWD, path.c_str(), AT_SYMLINK_NOFOLLOW, 0, &st);
+#else
     struct stat st;
     res = lstat(path.c_str(), &st);
+#endif
     if (!res) return true;
     if (errno != ENOENT && errno != ENOTDIR)
         throw SysError(format("getting status of %1%") % path);