Implement first instance of NOFORK applet - echo

find: use NOFORK/NOEXEC; small -exec buglet also eliminated
vfork_daemon_rexec: honor PREFER_APPLETS
echo: small size improvements

find -exec echo {} \; with PREFER_APPLETS=y runs 4 times faster

1 files changed, 23 insertions, 2 deletions

diff --git a/findutils/find.c b/findutils/find.c
index 594eafca4..7b5a09d56 100644
--- a/findutils/find.c
+++ b/findutils/find.c
@@ -242,9 +242,30 @@ ACTF(exec)
         for (i = 0; i < ap->exec_argc; i++)
                 argv[i] = subst(ap->exec_argv[i], ap->subst_count[i], fileName);
         argv[i] = NULL; /* terminate the list */
-        rc = wait4pid(spawn(argv));
-        if (rc)
+
+        if (ENABLE_FEATURE_EXEC_PREFER_APPLETS) {
+                const struct BB_applet *a = find_applet_by_name(argv[0]);
+                if (a) {
+                        if (a->nofork) {
+                                rc = a->main(ap->exec_argc, argv);
+                                goto f;
+                        }
+#ifndef BB_NOMMU
+                        if (a->noexec) {
+                                rc = fork();
+                                if (rc) goto w;
+                                current_applet = a;
+                                run_current_applet_and_exit(ap->exec_argc, argv);
+                        }
+#endif
+                }
+        }
+        rc = spawn(argv);
+ w:
+        rc = wait4pid(rc);
+        if (rc < 0)
                 bb_perror_msg("%s", argv[0]);
+ f:
         for (i = 0; i < ap->exec_argc; i++)
                 free(argv[i]);
         return rc == 0; /* return 1 if success */