describe: when failing, tell the user about options that work

diff --git a/ll-merge.c b/ll-merge.c
index 9168958e863e50f0d1bd1446b3314cb3dd2e772f..2d6b6d6cb1d2bc2d334bf058feb3444e94b5a781 100644 (file)
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -55,7 +55,7 @@ static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
 
 static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
                        mmbuffer_t *result,
-                       const char *path_unused,
+                       const char *path,
                        mmfile_t *orig,
                        mmfile_t *src1, const char *name1,
                        mmfile_t *src2, const char *name2,
@@ -67,10 +67,10 @@ static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
        if (buffer_is_binary(orig->ptr, orig->size) ||
            buffer_is_binary(src1->ptr, src1->size) ||
            buffer_is_binary(src2->ptr, src2->size)) {
-               warning("Cannot merge binary files: %s vs. %s\n",
-                       name1, name2);
+               warning("Cannot merge binary files: %s (%s vs. %s)\n",
+                       path, name1, name2);
                return ll_binary_merge(drv_unused, result,
-                                      path_unused,
+                                      path,
                                       orig, src1, name1,
                                       src2, name2,
                                       virtual_ancestor);
@@ -152,7 +152,7 @@ static void create_temp(mmfile_t *src, char *path)
        strcpy(path, ".merge_file_XXXXXX");
        fd = xmkstemp(path);
        if (write_in_full(fd, src->ptr, src->size) != src->size)
-               die("unable to write temp-file");
+               die_errno("unable to write temp-file");
        close(fd);
 }
 
@@ -192,10 +192,6 @@ static int ll_ext_merge(const struct ll_merge_driver *fn,
 
        args[2] = cmd.buf;
        status = run_command_v_opt(args, 0);
-       if (status < -ERR_RUN_COMMAND_FORK)
-               ; /* failure in run-command */
-       else
-               status = -status;
        fd = open(temp[1], O_RDONLY);
        if (fd < 0)
                goto bad;