1 files changed, 33 insertions, 21 deletions

diff --git a/shell/ash.c b/shell/ash.c
index c77ee8620..9bb8fd805 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -10286,44 +10286,56 @@ find_builtin(const char *name)
 static const char * FAST_FUNC
 ash_command_name(struct exe_state *e)
 {
-        if (e->e_type == 0) {
-                if (/*e->e_index >= 0 &&*/ e->e_index < ARRAY_SIZE(builtintab)) {
+        int index;
+        struct tblentry *cmdp;
+# if ENABLE_ASH_ALIAS
+        struct alias *ap;
+# endif
+
+        index = e->e_index;
+        switch (e->e_type) {
+        case 0:
+                if (index < ARRAY_SIZE(builtintab))
                         return builtintab[e->e_index++].name + 1;
-                }
                 e->e_type++;
-                e->e_index = 0;
-                e->e_ptr = cmdtable[0];
-        }
-        if (e->e_type == 1) {
-                struct tblentry *cmdp = (struct tblentry *)e->e_ptr;
-                while (e->e_index < CMDTABLESIZE) {
+                index = 0;
+                /* e->e_ptr = NULL; */
+                /* fall through */
+        case 1:
+                cmdp = (struct tblentry *)e->e_ptr;
+                for (;;) {
                         while (cmdp) {
                                 if (cmdp->cmdtype == CMDFUNCTION) {
+                                        e->e_index = index;
                                         e->e_ptr = cmdp->next;
                                         return cmdp->cmdname;
                                 }
                                 cmdp = cmdp->next;
                         }
-                        cmdp = cmdtable[++e->e_index];
+                        if (++index == CMDTABLESIZE)
+                                break;
+                        cmdp = cmdtable[index];
                 }
 # if ENABLE_ASH_ALIAS
                 e->e_type++;
-                e->e_index = 0;
-                e->e_ptr = atab[0];
-# endif
-        }
-# if ENABLE_ASH_ALIAS
-        if (e->e_type == 2) {
-                struct alias *ap = (struct alias *)e->e_ptr;
-                while (e->e_index < ATABSIZE) {
-                        while (ap) {
+                index = 0;
+                e->e_ptr = NULL;
+                /* fall through */
+        case 2:
+                ap = (struct alias *)e->e_ptr;
+                for (;;) {
+                        if (ap) {
+                                e->e_index = index;
                                 e->e_ptr = ap->next;
                                 return ap->name;
                         }
-                        ap = atab[++e->e_index];
+                        if (++index == ATABSIZE)
+                                break;
+                        ap = atab[index];
                 }
-        }
 # endif
+                break;
+        }
         return NULL;
 }
 #endif