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authorDenys Vlasenko <vda.linux@googlemail.com>2020-02-20 16:47:01 +0100
committerDenys Vlasenko <vda.linux@googlemail.com>2020-02-20 16:47:01 +0100
commitcd24a506336f84ff2bb3318bc4f2f82dd025f318 (patch)
tree4b05a48e5211faae670afb7671452a59ab0a89d5 /shell
parentbb095f483827567452ee3501779a84f36719288d (diff)
downloadbusybox-cd24a506336f84ff2bb3318bc4f2f82dd025f318.tar.gz
ash: Return without arguments in a trap should use status outside traps
Fixes exitcode_trap4.tests. Upstream commit: Date: Mon, 6 Oct 2014 21:51:26 +0800 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> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
-rw-r--r--shell/ash.c23
1 files changed, 18 insertions, 5 deletions
diff --git a/shell/ash.c b/shell/ash.c
index a6f777800..bea24601c 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -9091,6 +9091,7 @@ defun(union node *func)
#define SKIPBREAK (1 << 0)
#define SKIPCONT (1 << 1)
#define SKIPFUNC (1 << 2)
+#define SKIPFUNCDEF (1 << 3)
static smallint evalskip; /* set to SKIPxxx if we are skipping commands */
static int skipcount; /* number of levels to skip */
static int loopnest; /* current loop nesting level */
@@ -9148,7 +9149,8 @@ dotrap(void)
if (!p)
continue;
evalstring(p, 0);
- exitstatus = status;
+ if (evalskip != SKIPFUNC)
+ exitstatus = status;
}
savestatus = last_status;
@@ -9783,7 +9785,7 @@ evalfun(struct funcnode *func, int argc, char **argv, int flags)
shellparam = saveparam;
exception_handler = savehandler;
INT_ON;
- evalskip &= ~SKIPFUNC;
+ evalskip &= ~(SKIPFUNC | SKIPFUNCDEF);
return e;
}
@@ -9928,12 +9930,23 @@ execcmd(int argc UNUSED_PARAM, char **argv)
static int FAST_FUNC
returncmd(int argc UNUSED_PARAM, 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;
}
/* Forward declarations for builtintab[] */
@@ -13372,7 +13385,7 @@ cmdloop(int top)
skip = evalskip;
if (skip) {
- evalskip &= ~SKIPFUNC;
+ evalskip &= ~(SKIPFUNC | SKIPFUNCDEF);
break;
}
}