From: Peter Stephenson <p.stephenson@samsung.com>
To: <zsh-workers@zsh.org>
Subject: Re: [Bug] Exiting shell from function called by trap handler always produces status 0
Date: Tue, 9 Oct 2018 09:49:16 +0100 [thread overview]
Message-ID: <20181009084918eucas1p27dedda10d51beb773ba9175967912d2c~b5IUtvcVK3037630376eucas1p2R@eucas1p2.samsung.com> (raw)
In-Reply-To: <a5934536-7982-c434-d98d-2c07d66b0739@inlv.org>
On Mon, 2018-10-08 at 14:02 +0100, Martijn Dekker wrote:
> When a trap handler exits the shell using the 'exit' command within a
> function, the shell's exit status is zero even if another exit status
> was given as an argument to the 'exit' command.
>
> $ Src/zsh -c 'fn() { exit 13; }; trap "fn" EXIT'
> $ echo $?
> 0
> (expected output: 13)
diff --git a/Src/builtin.c b/Src/builtin.c
index c5b319b..b81acdb 100644
--- a/Src/builtin.c
+++ b/Src/builtin.c
@@ -5709,7 +5709,13 @@ int shell_exiting;
mod_export void
zexit(int val, int from_where)
{
- /* Don't do anything recursively: see below */
+ static int exit_val;
+ /*
+ * Don't do anything recursively: see below.
+ * Do, however, update exit status --- there's no nesting,
+ * a later value always overrides an earlier.
+ */
+ exit_val = val;
if (shell_exiting == -1)
return;
@@ -5757,7 +5763,7 @@ zexit(int val, int from_where)
#endif
}
}
- lastval = val;
+ lastval = exit_val;
/*
* Now we are committed to exiting any previous state
* is irrelevant. Ensure trap can run.
@@ -5771,9 +5777,9 @@ zexit(int val, int from_where)
release_pgrp();
}
if (mypid != getpid())
- _exit(val);
+ _exit(exit_val);
else
- exit(val);
+ exit(exit_val);
}
/* . (dot), source */
diff --git a/Test/C03traps.ztst b/Test/C03traps.ztst
index dce263f..3b5d4c6 100644
--- a/Test/C03traps.ztst
+++ b/Test/C03traps.ztst
@@ -863,6 +863,9 @@ F:Must be tested with a top-level script rather than
source or function
>a
>b
+ $ZTST_testdir/../Src/zsh -fc 'fn() { exit 13; }; trap fn EXIT; exit'
+13:Explicit exit in exit trap overrides status
+
%clean
rm -f TRAPEXIT
next prev parent reply other threads:[~2018-10-09 8:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20181009012624epcas1p44f2ae223f663713a980af4be735e5a3f@epcas1p4.samsung.com>
2018-10-08 13:02 ` Martijn Dekker
2018-10-09 8:49 ` Peter Stephenson [this message]
2018-10-09 9:58 ` Mikael Magnusson
2018-10-09 11:46 ` Martijn Dekker
2018-10-09 13:16 ` Peter Stephenson
2018-10-09 13:39 ` Daniel Shahaf
2018-10-09 13:43 ` Peter Stephenson
[not found] ` <1539092591.3286.12.camel@samsung.com>
2018-10-09 13:50 ` Peter Stephenson
2018-10-09 20:09 ` Peter Stephenson
2018-10-10 8:56 ` Daniel Shahaf
2018-10-10 9:31 ` Peter Stephenson
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