hush: "wait $!; echo $?" should return 127 if $! already exited

It would be nice to provide bash-like "remember las exitcode"
thingy, but it's a bit complex. For now, match ash and dash.

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

1 files changed, 5 insertions, 4 deletions

diff --git a/shell/hush.c b/shell/hush.c
index b842d6eec..7683a3749 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -9636,12 +9636,13 @@ static int FAST_FUNC builtin_wait(char **argv)
                                         /* "wait $!" but last bg task has already exited. Try:
                                          * (sleep 1; exit 3) & sleep 2; echo $?; wait $!; echo $?
                                          * In bash it prints exitcode 0, then 3.
+                                         * In dash, it is 127.
                                          */
-                                        ret = 0; /* FIXME */
-                                        continue;
+                                        /* ret = G.last_bg_pid_exitstatus - FIXME */
+                                } else {
+                                        /* Example: "wait 1". mimic bash message */
+                                        bb_error_msg("wait: pid %d is not a child of this shell", (int)pid);
                                 }
-                                /* Example: "wait 1". mimic bash message */
-                                bb_error_msg("wait: pid %d is not a child of this shell", (int)pid);
                         } else {
                                 /* ??? */
                                 bb_perror_msg("wait %s", *argv);