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hush: fix var=exit 2 not setting $? to 2

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-05-20 14:27:09 +02:00
parent 131ed3bcc9
commit cddbb610cb
3 changed files with 59 additions and 5 deletions
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15
shell/hush.c
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@ -2523,7 +2523,7 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg, char
* and $IFS-splitted */
debug_printf_subst("SUBST '%s' first_ch %x\n", arg, first_ch);
G.last_exitcode = process_command_subs(&subst_result, arg);
debug_printf_subst("SUBST RES '%s'\n", subst_result.data);
debug_printf_subst("SUBST RES:%d '%s'\n", G.last_exitcode, subst_result.data);
val = subst_result.data;
goto store_val;
#endif
@ -4117,9 +4117,9 @@ static NOINLINE int run_pipe(struct pipe *pi)
if (argv[command->assignment_cnt] == NULL) {
/* Assignments, but no command */
/* Ensure redirects take effect. Try "a=t >file" */
/* Ensure redirects take effect (that is, create files).
* Try "a=t >file": */
rcode = setup_redirects(command, squirrel);
//FIXME: "false; q=`false`; echo $?" should print 1
restore_redirects(squirrel);
/* Set shell variables */
while (*argv) {
@ -4129,6 +4129,11 @@ static NOINLINE int run_pipe(struct pipe *pi)
set_local_var(p, /*exp:*/ 0, /*lvl:*/ 0, /*ro:*/ 0);
argv++;
}
/* Redirect error sets $? to 1. Othervise,
* if evaluating assignment value set $?, retain it.
* Try "false; q=`exit 2`; echo $?" - should print 2: */
if (rcode == 0)
rcode = G.last_exitcode;
/* Do we need to flag set_local_var() errors?
* "assignment to readonly var" and "putenv error"
*/
@ -4186,7 +4191,7 @@ static NOINLINE int run_pipe(struct pipe *pi)
old_vars = set_vars_and_save_old(new_env);
if (!funcp) {
debug_printf_exec(": builtin '%s' '%s'...\n",
x->cmd, argv_expanded[1]);
x->b_cmd, argv_expanded[1]);
rcode = x->b_function(argv_expanded) & 0xff;
fflush_all();
}
@ -6814,7 +6819,7 @@ int hush_main(int argc, char **argv)
struct variable *cur_var;
INIT_G();
if (EXIT_SUCCESS) /* if EXIT_SUCCESS == 0, is already done */
if (EXIT_SUCCESS) /* if EXIT_SUCCESS == 0, it is already done */
G.last_exitcode = EXIT_SUCCESS;
#if !BB_MMU
G.argv0_for_re_execing = argv[0];

27
shell/hush_test/hush-psubst/falsetick.right Normal file
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@ -0,0 +1,27 @@
0
0
0
0
2
2
2
2
hush: can't open '/does/not/exist': No such file or directory
1
hush: can't open '/does/not/exist': No such file or directory
1
hush: can't open '/does/not/exist': No such file or directory
1
hush: can't open '/does/not/exist': No such file or directory
1
hush: can't open '/does/not/exist': No such file or directory
1
hush: can't open '/does/not/exist': No such file or directory
1
hush: can't open '/does/not/exist': No such file or directory
1
hush: can't open '/does/not/exist': No such file or directory
1
hush: can't open '/does/not/exist': No such file or directory
1
Done: a=b

22
shell/hush_test/hush-psubst/falsetick.tests Executable file
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@ -0,0 +1,22 @@
# Exitcode 0 (`` has no exitcode, but assignment has):
true; a=``; echo $?
false; a=``; echo $?
true; a=$(); echo $?
false; a=$(); echo $?
# Exitcode 2 (`cmd` expansion sets exitcode after assignment set it to 0):
true; a=`exit 2`; echo $?
false; a=`exit 2`; echo $?
true; a=$(exit 2); echo $?
false; a=$(exit 2); echo $?
# Exitcode 1 (redirect sets exitcode to 1 on error after them):
true; a=`` >/does/not/exist; echo $?
false; a=`` >/does/not/exist; echo $?
true; a=$() >/does/not/exist; echo $?
false; a=$() >/does/not/exist; echo $?
true; a=`exit 2` >/does/not/exist; echo $?
false; a=`exit 2` >/does/not/exist; echo $?
true; a=$(exit 2) >/does/not/exist; echo $?
false; a=$(exit 2) >/does/not/exist; echo $?
# ...and assignment still happens despite redirect error:
true; a=$(echo b) >/does/not/exist; echo $?
echo "Done: a=$a"