wic: honor the SOURCE_DATE_EPOCH in case of updated fstab

In case user requested to build a binary repeatable package,
it's required to honor the SOURCE_DATE_EPOCH environment
variable. So forcefully set mtime inside all the routines
which modify fstab in case it is updated.

(From OE-Core rev: 2671667f33d0eac1425db3fc4dff56d4eed1eb3c)

Signed-off-by: Sergei Zhmylev <s.zhmylev@yadro.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit 99719a3712a88dce8450994d995803e126e49115)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 10 insertions, 2 deletions

diff --git a/scripts/lib/wic/partition.py b/scripts/lib/wic/partition.py
index 09e491dd49..7c288d2958 100644
--- a/scripts/lib/wic/partition.py
+++ b/scripts/lib/wic/partition.py
@@ -293,6 +293,11 @@ class Partition():
                 f.write("cd etc\n")
                 f.write("rm fstab\n")
                 f.write("write %s fstab\n" % (self.updated_fstab_path))
+                if os.getenv('SOURCE_DATE_EPOCH'):
+                    fstab_time = int(os.getenv('SOURCE_DATE_EPOCH'))
+                    for time in ["atime", "mtime", "ctime"]:
+                        f.write("set_inode_field fstab %s %s\n" % (time, hex(fstab_time)))
+                        f.write("set_inode_field fstab %s_extra 0\n" % (time))
             debugfs_cmd = "debugfs -w -f %s %s" % (debugfs_script_path, rootfs)
             exec_native_cmd(debugfs_cmd, native_sysroot)
 
@@ -352,7 +357,7 @@ class Partition():
         exec_native_cmd(mcopy_cmd, native_sysroot)
 
         if self.updated_fstab_path and self.has_fstab and not self.no_fstab_update:
-            mcopy_cmd = "mcopy -i %s %s ::/etc/fstab" % (rootfs, self.updated_fstab_path)
+            mcopy_cmd = "mcopy -m -i %s %s ::/etc/fstab" % (rootfs, self.updated_fstab_path)
             exec_native_cmd(mcopy_cmd, native_sysroot)
 
         chmod_cmd = "chmod 644 %s" % rootfs
diff --git a/scripts/lib/wic/plugins/imager/direct.py b/scripts/lib/wic/plugins/imager/direct.py
index 4d0b836ef6..685d19b30f 100644
--- a/scripts/lib/wic/plugins/imager/direct.py
+++ b/scripts/lib/wic/plugins/imager/direct.py
@@ -148,6 +148,9 @@ class DirectPlugin(ImagerPlugin):
             self.updated_fstab_path = os.path.join(self.workdir, "fstab")
             with open(self.updated_fstab_path, "w") as f:
                 f.writelines(fstab_lines)
+            if os.getenv('SOURCE_DATE_EPOCH'):
+                fstab_time = int(os.getenv('SOURCE_DATE_EPOCH'))
+                os.utime(self.updated_fstab_path, (fstab_time, fstab_time))
 
     def _full_path(self, path, name, extention):
         """ Construct full file path to a file we generate. """
diff --git a/scripts/lib/wic/plugins/source/rootfs.py b/scripts/lib/wic/plugins/source/rootfs.py
index fc06312ee4..e29f3a4c2f 100644
--- a/scripts/lib/wic/plugins/source/rootfs.py
+++ b/scripts/lib/wic/plugins/source/rootfs.py
@@ -224,7 +224,7 @@ class RootfsPlugin(SourcePlugin):
             if part.update_fstab_in_rootfs and part.has_fstab and not part.no_fstab_update:
                 fstab_path = os.path.join(new_rootfs, "etc/fstab")
                 # Assume that fstab should always be owned by root with fixed permissions
-                install_cmd = "install -m 0644 %s %s" % (part.updated_fstab_path, fstab_path)
+                install_cmd = "install -m 0644 -p %s %s" % (part.updated_fstab_path, fstab_path)
                 if new_pseudo:
                     pseudo = cls.__get_pseudo(native_sysroot, new_rootfs, new_pseudo)
                 else: