grub2/0051-Add-grub_util_readlink.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Mon, 8 Jul 2019 21:46:52 +0200
Subject: [PATCH] Add grub_util_readlink()

Add grub_util_readlink().  This requires pulling in stat and readlink from
gnulib, which pulls in stat and related headers, but after that the
implementation is straightforward.

Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
---
 grub-core/osdep/windows/hostdisk.c    | 6 ++++++
 include/grub/osdep/hostfile_aros.h    | 6 ++++++
 include/grub/osdep/hostfile_unix.h    | 6 ++++++
 include/grub/osdep/hostfile_windows.h | 2 ++
 4 files changed, 20 insertions(+)

diff --git a/grub-core/osdep/windows/hostdisk.c b/grub-core/osdep/windows/hostdisk.c
index 355100789a7..87a106c9b82 100644
--- a/grub-core/osdep/windows/hostdisk.c
+++ b/grub-core/osdep/windows/hostdisk.c
@@ -365,6 +365,12 @@ grub_util_mkdir (const char *dir)
   free (windows_name);
 }
 
+ssize_t
+grub_util_readlink (const char *name, char *buf, size_t bufsize)
+{
+  return readlink(name, buf, bufsize);
+}
+
 int
 grub_util_rename (const char *from, const char *to)
 {
diff --git a/include/grub/osdep/hostfile_aros.h b/include/grub/osdep/hostfile_aros.h
index a059c0fa40a..161fbb7bdfd 100644
--- a/include/grub/osdep/hostfile_aros.h
+++ b/include/grub/osdep/hostfile_aros.h
@@ -68,6 +68,12 @@ grub_util_rename (const char *from, const char *to)
   return rename (from, to);
 }
 
+static inline ssize_t
+grub_util_readlink (const char *name, char *buf, size_t bufsize)
+{
+  return readlink(name, buf, bufsize);
+}
+
 #define grub_util_mkdir(a) mkdir ((a), 0755)
 
 struct grub_util_fd
diff --git a/include/grub/osdep/hostfile_unix.h b/include/grub/osdep/hostfile_unix.h
index 9ffe46fa3ca..17cd3aa8b30 100644
--- a/include/grub/osdep/hostfile_unix.h
+++ b/include/grub/osdep/hostfile_unix.h
@@ -71,6 +71,12 @@ grub_util_rename (const char *from, const char *to)
   return rename (from, to);
 }
 
+static inline ssize_t
+grub_util_readlink (const char *name, char *buf, size_t bufsize)
+{
+  return readlink(name, buf, bufsize);
+}
+
 #define grub_util_mkdir(a) mkdir ((a), 0755)
 
 #if defined (__NetBSD__)
diff --git a/include/grub/osdep/hostfile_windows.h b/include/grub/osdep/hostfile_windows.h
index bf6451b6db4..8c92d0591bb 100644
--- a/include/grub/osdep/hostfile_windows.h
+++ b/include/grub/osdep/hostfile_windows.h
@@ -41,6 +41,8 @@ typedef struct grub_util_fd_dir *grub_util_fd_dir_t;
 
 int
 grub_util_rename (const char *from, const char *to);
+ssize_t
+grub_util_readlink (const char *name, char *buf, size_t bufsize);
 int
 grub_util_unlink (const char *name);
 void