From 8c4e3b79bd0bb76eea16869e9666e19047c0d005 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Tue, 6 Apr 2021 14:00:24 +0200 Subject: [PATCH] cmd: exit: Fix return value In case exit is called in a script without parameter, the command returns -2 ; in case exit is called with a numerical parameter, the command returns -2 and lower. This leads to the following problem: => setenv foo 'echo bar ; exit 1' ; run foo ; echo $? bar 0 => setenv foo 'echo bar ; exit 0' ; run foo ; echo $? bar 0 => setenv foo 'echo bar ; exit -2' ; run foo ; echo $? bar 0 That is, no matter what the 'exit' command argument is, the return value is always 0 and so it is not possible to use script return value in subsequent tests. Fix this and simplify the exit command such that if exit is called with no argument, the command returns 0, just like 'true' in cmd/test.c. In case the command is called with any argument that is positive integer, the argument is set as return value. => setenv foo 'echo bar ; exit 1' ; run foo ; echo $? bar 1 => setenv foo 'echo bar ; exit 0' ; run foo ; echo $? bar 0 => setenv foo 'echo bar ; exit -2' ; run foo ; echo $? bar 0 Note that this does change ABI established in 2004 , although it is unclear whether that ABI was originally OK or not. Fixes: c26e454dfc6 Signed-off-by: Marek Vasut Cc: Pantelis Antoniou Cc: Tom Rini --- cmd/exit.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/cmd/exit.c b/cmd/exit.c index 7bf241ec73..923f0870fb 100644 --- a/cmd/exit.c +++ b/cmd/exit.c @@ -10,13 +10,10 @@ static int do_exit(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { - int r; - - r = 0; if (argc > 1) - r = simple_strtoul(argv[1], NULL, 10); + return simple_strtoul(argv[1], NULL, 10); - return -r - 2; + return 0; } U_BOOT_CMD( -- 2.39.5