[BUILTIN] Return without arguments in a trap should use status outside traps
POSIX now requires that return without arguments in a trap should
return the last command status prior to executing traps. This
patch implements this behaviour.
Incidentally this also changes the behaviour of return without
arguments in a loop conditional to use the last exit status in
the body as opposed to the last command in the conditional when
there is one.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/ChangeLog b/ChangeLog
index 297b81a..aa230ab 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,7 @@
* Do not allow break to break across function calls.
* Move common skipcount logic into skiploop.
* Allow return in loop conditional to set exit status.
+ * Return without arguments in a trap should use status outside traps.
2014-10-03 Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/src/eval.c b/src/eval.c
index 7b341f3..071fb1b 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -967,7 +967,7 @@
shellparam = saveparam;
handler = savehandler;
INTON;
- evalskip &= ~SKIPFUNC;
+ evalskip &= ~(SKIPFUNC | SKIPFUNCDEF);
return e;
}
@@ -1047,12 +1047,23 @@
int
returncmd(int argc, char **argv)
{
+ int skip;
+ int status;
+
/*
* If called outside a function, do what ksh does;
* skip the rest of the file.
*/
- evalskip = SKIPFUNC;
- return argv[1] ? number(argv[1]) : exitstatus;
+ if (argv[1]) {
+ skip = SKIPFUNC;
+ status = number(argv[1]);
+ } else {
+ skip = SKIPFUNCDEF;
+ status = exitstatus;
+ }
+ evalskip = skip;
+
+ return status;
}
diff --git a/src/eval.h b/src/eval.h
index 6e62137..6e8acda 100644
--- a/src/eval.h
+++ b/src/eval.h
@@ -62,3 +62,4 @@
#define SKIPBREAK (1 << 0)
#define SKIPCONT (1 << 1)
#define SKIPFUNC (1 << 2)
+#define SKIPFUNCDEF (1 << 3)
diff --git a/src/main.c b/src/main.c
index 29a258d..00c5e00 100644
--- a/src/main.c
+++ b/src/main.c
@@ -242,7 +242,7 @@
skip = evalskip;
if (skip) {
- evalskip &= ~SKIPFUNC;
+ evalskip &= ~(SKIPFUNC | SKIPFUNCDEF);
break;
}
}
diff --git a/src/trap.c b/src/trap.c
index 15faeff..b924661 100644
--- a/src/trap.c
+++ b/src/trap.c
@@ -343,7 +343,8 @@
if (!p)
continue;
evalstring(p, 0);
- exitstatus = status;
+ if (evalskip != SKIPFUNC)
+ exitstatus = status;
}
savestatus = last_status;
