make temporary filenames more distcc friendly

(patch from Martin Pool)

diff --git a/ccache.c b/ccache.c
index 066f8189ac1c6d1e82f10f3fe1100bed1cb6c326..089bccd363d4121ba87bf2412aab4857aaeff918 100644 (file)
--- a/ccache.c
+++ b/ccache.c
@@ -240,7 +240,9 @@ static void find_hash(ARGS *args)
        struct stat st;
        int status;
        int nlevels = 2;
-
+       char *input_base;
+       char *tmp;
+       
        if ((s = getenv("CCACHE_NLEVELS"))) {
                nlevels = atoi(s);
                if (nlevels < 1) nlevels = 1;
@@ -309,8 +311,22 @@ static void find_hash(ARGS *args)
                }
        }
 
+       /* ~/hello.c -> tmp.hello.123.i 
+          limit the basename to 10
+          characters in order to cope with filesystem with small
+          maximum filename length limits */
+       input_base = basename(input_file);
+       tmp = strchr(input_base, '.');
+       if (tmp != NULL) {
+               *tmp = 0;
+       }
+       if (strlen(input_base) > 10) {
+               input_base[10] = 0;
+       }
+
        /* now the run */
-       x_asprintf(&path_stdout, "%s/tmp.stdout.%s.%s", cache_dir, tmp_string(), 
+       x_asprintf(&path_stdout, "%s/%s.tmp.%s.%s", cache_dir,
+                  input_base, tmp_string(), 
                   i_extension);
        x_asprintf(&path_stderr, "%s/tmp.cpp_stderr.%s", cache_dir, tmp_string());