make_filename: another off-by-one buffer issue

Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/init.c b/init.c
index 75b997ef54438615b1976b208c1c789eaef99f1c..21779c7b162fda0dadeb9f2238d7a334f7c7f3db 100644 (file)
--- a/init.c
+++ b/init.c
@@ -942,7 +942,7 @@ static char *make_filename(char *buf, struct thread_options *o,
 {
        struct fpre_keyword *f;
        char copy[PATH_MAX];
-       size_t dst_left = PATH_MAX;
+       size_t dst_left = PATH_MAX - 1;
 
        if (!o->filename_format || !strlen(o->filename_format)) {
                sprintf(buf, "%s.%d.%d", jobname, jobnum, filenum);