From: Jim Meyering <jim@meyering.net>
Date: Sun, 18 Apr 1999 13:32:35 +0000 (+0000)
Subject: (main): Open the output file with *read* access
X-Git-Tag: TEXTUTILS-1_22j~31
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8f913cc64f0afbd2e920f70fce20523c301a0135;p=thirdparty%2Fcoreutils.git

(main): Open the output file with *read* access
only if we might need to read to satisfy a `seek=' request.
From Matthias Urlichs.
---

diff --git a/src/dd.c b/src/dd.c
index e4d3cc9e4e..c4a013ec16 100644
--- a/src/dd.c
+++ b/src/dd.c
@@ -1121,7 +1121,9 @@ main (int argc, char **argv)
 
   if (output_file != NULL)
     {
-      int omode = O_RDWR | O_CREAT;
+      /* Open the output file with *read* access only if we might
+	 need to read to satisfy a `seek=' request.  */
+      int omode = (seek_record ? O_RDWR : O_WRONLY) | O_CREAT;
 
       if (seek_record == 0 && !(conversions_mask & C_NOTRUNC))
 	omode |= O_TRUNC;