diagnose_invalid_index_path: use strbuf to avoid strcpy/strcat

diff --git a/ll-merge.c b/ll-merge.c
index fc3c0495942e2a8d7c31a087429f894633c603d8..56f73b393256091194d88eaf9d1b87776dc06dff 100644 (file)
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -142,11 +142,11 @@ static struct ll_merge_driver ll_merge_drv[] = {
        { "union", "built-in union merge", ll_union_merge },
 };
 
-static void create_temp(mmfile_t *src, char *path)
+static void create_temp(mmfile_t *src, char *path, size_t len)
 {
        int fd;
 
-       strcpy(path, ".merge_file_XXXXXX");
+       xsnprintf(path, len, ".merge_file_XXXXXX");
        fd = xmkstemp(path);
        if (write_in_full(fd, src->ptr, src->size) != src->size)
                die_errno("unable to write temp-file");
@@ -187,10 +187,10 @@ static int ll_ext_merge(const struct ll_merge_driver *fn,
 
        result->ptr = NULL;
        result->size = 0;
-       create_temp(orig, temp[0]);
-       create_temp(src1, temp[1]);
-       create_temp(src2, temp[2]);
-       sprintf(temp[3], "%d", marker_size);
+       create_temp(orig, temp[0], sizeof(temp[0]));
+       create_temp(src1, temp[1], sizeof(temp[1]));
+       create_temp(src2, temp[2], sizeof(temp[2]));
+       xsnprintf(temp[3], sizeof(temp[3]), "%d", marker_size);
 
        strbuf_expand(&cmd, fn->cmdline, strbuf_expand_dict_cb, &dict);