From 2f69ee2f0f25c6fc1dbc440c14c52aeaaf35b6a8 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Sun, 8 Nov 2015 16:47:52 -0600
Subject: NOEXIT(thingy()) wrapper to turn xwrap() functions into warning
versions.
Also WOULD_EXIT(x, thingy()) to set a variable to 1 or 0 showing whether or
not thingy() tried to exit. I'd love to be able to do "x = NOEXIT(thingy());"
but haven't figured out a syntax to make that work yet...
---
lib/lib.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/lib/lib.h b/lib/lib.h
index ad59989a..301c50f4 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -256,5 +256,16 @@ void names_to_pid(char **names, int (*callback)(pid_t pid, char *name));
pid_t xvforkwrap(pid_t pid);
#define XVFORK() xvforkwrap(vfork())
+#define WOULD_EXIT(y, x) { jmp_buf _noexit; \
+ int _noexit_res; \
+ toys.rebound = &_noexit; \
+ _noexit_res = setjmp(_noexit); \
+ if (!_noexit_res) do {x;} while(0); \
+ toys.rebound = 0; \
+ y = _noexit_res; \
+}
+
+#define NOEXIT(x) WOULD_EXIT(_noexit_res, x)
+
// Functions in need of further review/cleanup
#include "lib/pending.h"
--
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