[rtems commit] tools/build/eolstrip.c: Use snprintf() to avoid potential buffer overflow

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    c218d01d7a010f05878192a919cddccaf80394a0
Changeset: http://git.rtems.org/rtems/commit/?id=c218d01d7a010f05878192a919cddccaf80394a0

Author:    Joel Sherrill <joel at rtems.org>
Date:      Mon Mar 13 10:42:24 2017 -0500

tools/build/eolstrip.c: Use snprintf() to avoid potential buffer overflow

This was spotted by Coverity Scan.

---

 tools/build/eolstrip.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/build/eolstrip.c b/tools/build/eolstrip.c
index e93b45e..091b06e 100644
--- a/tools/build/eolstrip.c
+++ b/tools/build/eolstrip.c
@@ -171,7 +171,9 @@ process(char *arg)
     error( ERR_ERRNO | ERR_FATAL, "Unable to open file (%s)\n", arg );
 
   if ( !test_only ) {
-    sprintf( outname, "%s.eoltmp", arg );
+    length = snprintf( outname, BUFFER_SIZE, "%s.eoltmp", arg );
+    if (length >= BUFFER_SIZE)
+      error( ERR_ERRNO | ERR_FATAL, "Tmp file name too long\n" );
 
     out = fopen( outname, "w" );
     if (!out)