From 741bf0726e71c931af1dc1278571c280fc27970f Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sun, 3 Jul 2016 20:21:29 +0200
Subject: syscallcompat: OSX: add Mknodat wrapper

Protip: find naked *at syscalls using:

   git grep "syscall." | grep "at(" | grep -v syscallcompat
---
 internal/syscallcompat/sys_darwin.go | 18 ++++++++++++++++++
 internal/syscallcompat/sys_linux.go  |  4 ++++
 2 files changed, 22 insertions(+)

(limited to 'internal/syscallcompat')

diff --git a/internal/syscallcompat/sys_darwin.go b/internal/syscallcompat/sys_darwin.go
index 6300317..852eee4 100644
--- a/internal/syscallcompat/sys_darwin.go
+++ b/internal/syscallcompat/sys_darwin.go
@@ -87,6 +87,24 @@ func Unlinkat(dirfd int, path string) (err error) {
 	return syscall.Unlink(path)
 }
 
+// Poor man's Mknodat
+func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) {
+	chdirMutex.Lock()
+	defer chdirMutex.Unlock()
+	if !filepath.IsAbs(path) {
+		oldWd, err := os.Getwd()
+		if err != nil {
+			return err
+		}
+		defer os.Chdir(oldWd)
+	}
+	path, err = dirfdAbs(dirfd, path)
+	if err != nil {
+		return err
+	}
+	return syscall.Mknod(path, mode, dev)
+}
+
 // dirfdAbs transforms the dirfd-relative "path" to an absolute one. If the
 // path is not already absolute, this function will change the working
 // directory. The caller has to chdir back.
diff --git a/internal/syscallcompat/sys_linux.go b/internal/syscallcompat/sys_linux.go
index ded5d17..81cdb15 100644
--- a/internal/syscallcompat/sys_linux.go
+++ b/internal/syscallcompat/sys_linux.go
@@ -52,3 +52,7 @@ func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err e
 func Unlinkat(dirfd int, path string) error {
 	return syscall.Unlinkat(dirfd, path)
 }
+
+func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) {
+	return syscall.Mknodat(dirfd, path, mode, dev)
+}
-- 
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