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cli: hush: Adjust 'run' command to run each line of the env var

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The run command treats each argument an an environment variable. It gets the
value of each variable and executes it as a command. If an environment
variable contains a newline and the hush cli is used, it is supposed to
execute each line one after the other.

Normally a newline signals to hush to exit - this is used in normal command
line entry - after a command is entered we want to return to allow the user
to enter the next one. But environment variables obviously need to execute
to completion.

Add a special case for the execution of environment variables which
continues when a newline is seen, and add a few tests to check this
behaviour.

Note: it's not impossible that this may cause regressions in other areas.
I can't think of a case but with any change of behaviour with limited test
coverage there is always a risk. From what I can tell this behaviour has
been around since at least U-Boot 2011.03, although this pre-dates sandbox
and I have not tested it on real hardware.

Reported-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2014-10-07 13:59:43 -06:00
committed by Tom Rini
parent 0cf8761549
commit 87b6398b46
5 changed files with 24 additions and 4 deletions
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14
test/command_ut.c
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@@ -66,7 +66,21 @@ static int do_ut_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
assert(run_command_list("false", -1, 0) == 1);
assert(run_command_list("echo", -1, 0) == 0);
run_command("setenv foo 'setenv monty 1; setenv python 2'", 0);
run_command("run foo", 0);
assert(getenv("monty") != NULL);
assert(!strcmp("1", getenv("monty")));
assert(getenv("python") != NULL);
assert(!strcmp("2", getenv("python")));
#ifdef CONFIG_SYS_HUSH_PARSER
run_command("setenv foo 'setenv black 1\nsetenv adder 2'", 0);
run_command("run foo", 0);
assert(getenv("black") != NULL);
assert(!strcmp("1", getenv("black")));
assert(getenv("adder") != NULL);
assert(!strcmp("2", getenv("adder")));
/* Test the 'test' command */
#define HUSH_TEST(name, expr, expected_result) \