imgtool: dumpinfo: Avoid exit and use return

Signed-off-by: Guillaume G. <[email protected]>

Author: Guillaume G.

scripts/imgtool/dumpinfo.py

@@ -251,7 +251,7 @@ def dump_imginfo(imgfile, outfile=None, silent=False):
     ###############################################################################
 
     if silent:
-        sys.exit(0)
+        return
 
     print("Printing content of signed image:", os.path.basename(imgfile), "\n")
 

scripts/imgtool/main.py

@@ -259,7 +259,8 @@ def verify(key, imgfile):
                     'of a signed image')
 def dumpinfo(imgfile, outfile, silent):
     dump_imginfo(imgfile, outfile, silent)
-    print("dumpinfo has run successfully")
+    if not silent:
+        print("dumpinfo has run successfully")
 
 
 def validate_version(ctx, param, value):