1 files changed, 16 insertions, 0 deletions

diff --git a/libbb/vfork_daemon_rexec.c b/libbb/vfork_daemon_rexec.c
index 885c19f1a..151739ae2 100644
--- a/libbb/vfork_daemon_rexec.c
+++ b/libbb/vfork_daemon_rexec.c
@@ -28,6 +28,22 @@
 # ifndef PR_GET_NAME
 # define PR_GET_NAME 16
 # endif
+# if ENABLE_FEATURE_SH_STANDALONE || ENABLE_FEATURE_PREFER_APPLETS || !BB_MMU
+int FAST_FUNC re_execed_comm(void)
+{
+        const char *e, *expected_comm;
+        char comm[16];
+
+        BUILD_BUG_ON(CONFIG_BUSYBOX_EXEC_PATH[0] != '/');
+        e = CONFIG_BUSYBOX_EXEC_PATH;
+        /* Hopefully (strrchr(e) - e) evaluates to constant at compile time: */
+        expected_comm = bb_busybox_exec_path + (strrchr(e, '/') - e) + 1;
+
+        prctl(PR_GET_NAME, (long)comm, 0, 0, 0);
+        //bb_error_msg("comm:'%.*s' expected:'%s'", 16, comm, expected_comm);
+        return strcmp(comm, expected_comm) == 0;
+}
+# endif
 void FAST_FUNC set_task_comm(const char *comm)
 {
         /* okay if too long (truncates) */