set mode on output file, and don't clobber existing

diff --git a/apic-read.cc b/apic-read.cc
index ad07b3d..d03287f 100644 (file)
--- a/apic-read.cc
+++ b/apic-read.cc
@@ -41,7 +41,7 @@ main(int argc, char **argv)
         }
         AttachedPictureFrame *pic_frame = (AttachedPictureFrame *)frame;
         TagLib::ByteVector data = pic_frame->picture();
-        int fd = open(argv[2], O_CREAT | O_WRONLY);
+        int fd = open(argv[2], O_CREAT | O_EXCL | O_WRONLY, 0644);
         if (fd < 0) {
             perror("open");
             return 2;