hush: fix for "while false && true; do echo BUG; break; done". closes 6170

function                                             old     new   delta
run_list                                             959     941     -18

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/shell/hush.c b/shell/hush.c
index b233257..1d421dc 100644 (file)
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -7354,7 +7354,7 @@ static int run_list(struct pipe *pi)
                                 * and we should not execute CMD */
                                debug_printf_exec("skipped cmd because of || or &&\n");
                                last_followup = pi->followup;
-                               continue;
+                               goto dont_check_jobs_but_continue;
                        }
                }
                last_followup = pi->followup;
@@ -7493,8 +7493,10 @@ static int run_list(struct pipe *pi)
                                                        G.flag_break_continue = 0;
                                                /* else: e.g. "continue 2" should *break* once, *then* continue */
                                        } /* else: "while... do... { we are here (innermost list is not a loop!) };...done" */
-                                       if (G.depth_break_continue != 0 || fbc == BC_BREAK)
-                                               goto check_jobs_and_break;
+                                       if (G.depth_break_continue != 0 || fbc == BC_BREAK) {
+                                               checkjobs(NULL);
+                                               break;
+                                       }
                                        /* "continue": simulate end of loop */
                                        rword = RES_DONE;
                                        continue;
@@ -7502,7 +7504,6 @@ static int run_list(struct pipe *pi)
 #endif
 #if ENABLE_HUSH_FUNCTIONS
                                if (G.flag_return_in_progress == 1) {
-                                       /* same as "goto check_jobs_and_break" */
                                        checkjobs(NULL);
                                        break;
                                }
@@ -7544,6 +7545,9 @@ static int run_list(struct pipe *pi)
                if (rword == RES_IF || rword == RES_ELIF)
                        cond_code = rcode;
 #endif
+ check_jobs_and_continue:
+               checkjobs(NULL);
+ dont_check_jobs_but_continue: ;
 #if ENABLE_HUSH_LOOPS
                /* Beware of "while false; true; do ..."! */
                if (pi->next
@@ -7555,22 +7559,17 @@ static int run_list(struct pipe *pi)
                                        /* "while false; do...done" - exitcode 0 */
                                        G.last_exitcode = rcode = EXIT_SUCCESS;
                                        debug_printf_exec(": while expr is false: breaking (exitcode:EXIT_SUCCESS)\n");
-                                       goto check_jobs_and_break;
+                                       break;
                                }
                        }
                        if (rword == RES_UNTIL) {
                                if (!rcode) {
                                        debug_printf_exec(": until expr is true: breaking\n");
- check_jobs_and_break:
-                                       checkjobs(NULL);
                                        break;
                                }
                        }
                }
 #endif
-
- check_jobs_and_continue:
-               checkjobs(NULL);
        } /* for (pi) */
 
 #if ENABLE_HUSH_JOB

diff --git a/shell/hush_test/hush-misc/while4.right b/shell/hush_test/hush-misc/while4.right
new file mode 100644 (file)
index 0000000..7b24a35
--- /dev/null
+++ b/shell/hush_test/hush-misc/while4.right
@@ -0,0 +1 @@
+Ok:0

diff --git a/shell/hush_test/hush-misc/while4.tests b/shell/hush_test/hush-misc/while4.tests
new file mode 100755 (executable)
index 0000000..ba80e60
--- /dev/null
+++ b/shell/hush_test/hush-misc/while4.tests
@@ -0,0 +1,6 @@
+false
+while false && echo Not reached; do
+    echo BUG
+    break
+done
+echo Ok:$?