use xsnprintf for generating git object headers

diff --git a/diff.c b/diff.c
index 08508f6a2017eb35a350268ea78a44cfc1d867e4..788e371decee39fb2aa0048c8b93f322d7ffa832 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -2880,7 +2880,7 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
        temp->name = get_tempfile_path(&temp->tempfile);
        strcpy(temp->hex, sha1_to_hex(sha1));
        temp->hex[40] = 0;
-       sprintf(temp->mode, "%06o", mode);
+       xsnprintf(temp->mode, sizeof(temp->mode), "%06o", mode);
        strbuf_release(&buf);
        strbuf_release(&template);
        free(path_dup);
@@ -2897,8 +2897,8 @@ static struct diff_tempfile *prepare_temp_file(const char *name,
                 * a '+' entry produces this for file-1.
                 */
                temp->name = "/dev/null";
-               strcpy(temp->hex, ".");
-               strcpy(temp->mode, ".");
+               xsnprintf(temp->hex, sizeof(temp->hex), ".");
+               xsnprintf(temp->mode, sizeof(temp->mode), ".");
                return temp;
        }
 
@@ -2935,7 +2935,7 @@ static struct diff_tempfile *prepare_temp_file(const char *name,
                         * !(one->sha1_valid), as long as
                         * DIFF_FILE_VALID(one).
                         */
-                       sprintf(temp->mode, "%06o", one->mode);
+                       xsnprintf(temp->mode, sizeof(temp->mode), "%06o", one->mode);
                }
                return temp;
        }
@@ -4081,9 +4081,9 @@ const char *diff_unique_abbrev(const unsigned char *sha1, int len)
        if (abblen < 37) {
                static char hex[41];
                if (len < abblen && abblen <= len + 2)
-                       sprintf(hex, "%s%.*s", abbrev, len+3-abblen, "..");
+                       xsnprintf(hex, sizeof(hex), "%s%.*s", abbrev, len+3-abblen, "..");
                else
-                       sprintf(hex, "%s...", abbrev);
+                       xsnprintf(hex, sizeof(hex), "%s...", abbrev);
                return hex;
        }
        return sha1_to_hex(sha1);