tools/cephfs: use snprintf in Dumper

Signed-off-by: John Spray <john.spray@redhat.com>

diff --git a/src/tools/cephfs/Dumper.cc b/src/tools/cephfs/Dumper.cc
index bade9754edc9b4aa53145aa8a87593c192158454..f97029e4341d4e8f925fd5f6cf5ee057bfca1106 100644 (file)
--- a/src/tools/cephfs/Dumper.cc
+++ b/src/tools/cephfs/Dumper.cc
@@ -93,7 +93,7 @@ int Dumper::dump(const char *dump_file)
     // include an informative header
     char buf[HEADER_LEN];
     memset(buf, 0, sizeof(buf));
-    sprintf(buf, "Ceph mds%d journal dump\n start offset %llu (0x%llx)\n       length %llu (0x%llx)\n    write_pos %llu (0x%llx)\n    format %llu\n    trimmed_pos %llu (0x%llx)\n%c",
+    snprintf(buf, HEADER_LEN, "Ceph mds%d journal dump\n start offset %llu (0x%llx)\n       length %llu (0x%llx)\n    write_pos %llu (0x%llx)\n    format %llu\n    trimmed_pos %llu (0x%llx)\n%c",
            rank, 
            (unsigned long long)start, (unsigned long long)start,
            (unsigned long long)len, (unsigned long long)len,