File ed-style-01-missing-input-files.patch of Package patch

From: Andreas Gruenbacher <agruen@gnu.org>
Date: Fri, 6 Apr 2018 11:34:51 +0200
Subject: Allow input files to be missing for ed-style patches
Patch-mainline: yes
Git-commit: b5a91a01e5d0897facdd0f49d64b76b0f02b43e1
References: bsc#1088420, savannah#53566, CVE-2018-1000156

* src/pch.c (do_ed_script): Allow input files to be missing so that new
files will be created as with non-ed-style patches.
---
 src/pch.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/src/pch.c
+++ b/src/pch.c
@@ -2394,9 +2394,11 @@ do_ed_script (char const *inname, char c
 
     if (! dry_run && ! skip_rest_of_patch) {
 	int exclusive = *outname_needs_removal ? 0 : O_EXCL;
-	assert (! inerrno);
-	*outname_needs_removal = true;
-	copy_file (inname, outname, 0, exclusive, instat.st_mode, true);
+	if (inerrno != ENOENT)
+	  {
+	    *outname_needs_removal = true;
+	    copy_file (inname, outname, 0, exclusive, instat.st_mode, true);
+	  }
 	sprintf (buf, "%s %s%s", editor_program,
 		 verbosity == VERBOSE ? "" : "- ",
 		 outname);