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-rw-r--r--shell/ash_test/ash-vars/param_expand_indicate_error.right43
-rwxr-xr-xshell/ash_test/ash-vars/param_expand_indicate_error.tests61
-rw-r--r--shell/hush.c12
-rw-r--r--shell/hush_test/hush-vars/param_expand_indicate_error.right2
-rwxr-xr-xshell/hush_test/hush-vars/param_expand_indicate_error.tests2
5 files changed, 115 insertions, 5 deletions
diff --git a/shell/ash_test/ash-vars/param_expand_indicate_error.right b/shell/ash_test/ash-vars/param_expand_indicate_error.right
new file mode 100644
index 000000000..33afacee0
--- /dev/null
+++ b/shell/ash_test/ash-vars/param_expand_indicate_error.right
@@ -0,0 +1,43 @@
+SHELL: line 1: syntax error: bad substitution
+1
+0
+====
+_
+SHELL: line 1: 1: parameter not set
+SHELL: line 1: 1: parameter not set or null
+SHELL: line 1: 1: message1
+SHELL: line 1: 1: message1
+SHELL: line 1: 1: unset!
+SHELL: line 1: 1: null or unset!
+====
+_aaaa
+_aaaa
+_aaaa
+_aaaa
+_aaaa
+_aaaa
+_aaaa
+====
+_
+SHELL: line 1: f: parameter not set
+SHELL: line 1: f: parameter not set or null
+SHELL: line 1: f: message3
+SHELL: line 1: f: message3
+SHELL: line 1: f: unset!
+SHELL: line 1: f: null or unset!
+====
+_
+_
+SHELL: line 1: f: parameter not set or null
+_
+SHELL: line 1: f: message4
+_
+SHELL: line 1: f: null or unset!
+====
+_fff
+_fff
+_fff
+_fff
+_fff
+_fff
+_fff
diff --git a/shell/ash_test/ash-vars/param_expand_indicate_error.tests b/shell/ash_test/ash-vars/param_expand_indicate_error.tests
new file mode 100755
index 000000000..0f3061949
--- /dev/null
+++ b/shell/ash_test/ash-vars/param_expand_indicate_error.tests
@@ -0,0 +1,61 @@
+# do all of these in subshells since it's supposed to error out
+# (set argv0 to "SHELL" to avoid "/path/to/shell: blah" in error messages)
+
+# first try some invalid patterns
+#"$THIS_SH" -c 'echo ${?}' SHELL -- this is valid as it's the same as $?
+"$THIS_SH" -c 'echo ${:?}' SHELL
+
+# then some funky ones
+# note: bash prints 1 - treats it as "length of $#"
+"$THIS_SH" -c 'echo ${#?}' SHELL
+# bash prints 0
+"$THIS_SH" -c 'echo ${#:?}' SHELL
+
+# now some valid ones
+export msg_unset="unset!"
+export msg_null_or_unset="null or unset!"
+
+echo ====
+"$THIS_SH" -c 'set --; echo _$1' SHELL
+"$THIS_SH" -c 'set --; echo _${1?}' SHELL
+"$THIS_SH" -c 'set --; echo _${1:?}' SHELL
+"$THIS_SH" -c 'set --; echo _${1?message1}' SHELL
+"$THIS_SH" -c 'set --; echo _${1:?message1}' SHELL
+"$THIS_SH" -c 'set --; echo _${1?$msg_unset}' SHELL
+"$THIS_SH" -c 'set --; echo _${1:?$msg_null_or_unset}' SHELL
+
+echo ====
+"$THIS_SH" -c 'set -- aaaa; echo _$1' SHELL
+"$THIS_SH" -c 'set -- aaaa; echo _${1?}' SHELL
+"$THIS_SH" -c 'set -- aaaa; echo _${1:?}' SHELL
+"$THIS_SH" -c 'set -- aaaa; echo _${1?word}' SHELL
+"$THIS_SH" -c 'set -- aaaa; echo _${1:?word}' SHELL
+"$THIS_SH" -c 'set -- aaaa; echo _${1?$msg_unset}' SHELL
+"$THIS_SH" -c 'set -- aaaa; echo _${1:?$msg_null_or_unset}' SHELL
+
+echo ====
+"$THIS_SH" -c 'unset f; echo _$f' SHELL
+"$THIS_SH" -c 'unset f; echo _${f?}' SHELL
+"$THIS_SH" -c 'unset f; echo _${f:?}' SHELL
+"$THIS_SH" -c 'unset f; echo _${f?message3}' SHELL
+"$THIS_SH" -c 'unset f; echo _${f:?message3}' SHELL
+"$THIS_SH" -c 'unset f; echo _${f?$msg_unset}' SHELL
+"$THIS_SH" -c 'unset f; echo _${f:?$msg_null_or_unset}' SHELL
+
+echo ====
+"$THIS_SH" -c 'f=; echo _$f' SHELL
+"$THIS_SH" -c 'f=; echo _${f?}' SHELL
+"$THIS_SH" -c 'f=; echo _${f:?}' SHELL
+"$THIS_SH" -c 'f=; echo _${f?word}' SHELL
+"$THIS_SH" -c 'f=; echo _${f:?message4}' SHELL
+"$THIS_SH" -c 'f=; echo _${f?$msg_unset}' SHELL
+"$THIS_SH" -c 'f=; echo _${f:?$msg_null_or_unset}' SHELL
+
+echo ====
+"$THIS_SH" -c 'f=fff; echo _$f' SHELL
+"$THIS_SH" -c 'f=fff; echo _${f?}' SHELL
+"$THIS_SH" -c 'f=fff; echo _${f:?}' SHELL
+"$THIS_SH" -c 'f=fff; echo _${f?word}' SHELL
+"$THIS_SH" -c 'f=fff; echo _${f:?word}' SHELL
+"$THIS_SH" -c 'f=fff; echo _${f?$msg_unset}' SHELL
+"$THIS_SH" -c 'f=fff; echo _${f:?$msg_null_or_unset}' SHELL
diff --git a/shell/hush.c b/shell/hush.c
index 20b092398..f9dad074f 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -5559,8 +5559,10 @@ static NOINLINE const char *expand_one_var(char **to_be_freed_pp, char *arg, cha
first_char = arg[0] = arg0 & 0x7f;
exp_op = 0;
- if (first_char == '#' /* ${#... */
- && arg[1] && !exp_saveptr /* not ${#} and not ${#<op_char>...} */
+ if (first_char == '#' && arg[1] /* ${#... but not ${#} */
+ && (!exp_saveptr /* and (not ${#<op_char>...} */
+ || (arg[1] == '?' && arg[2] == '\0') /* or ${#?} - "len of $?") */
+ )
) {
/* It must be length operator: ${#var} */
var++;
@@ -5797,7 +5799,11 @@ static NOINLINE const char *expand_one_var(char **to_be_freed_pp, char *arg, cha
/* mimic bash message */
die_if_script("%s: %s",
var,
- exp_word[0] ? exp_word : "parameter null or not set"
+ exp_word[0]
+ ? exp_word
+ : "parameter null or not set"
+ /* ash has more specific messages, a-la: */
+ /*: (exp_save == ':' ? "parameter null or not set" : "parameter not set")*/
);
//TODO: how interactive bash aborts expansion mid-command?
} else {
diff --git a/shell/hush_test/hush-vars/param_expand_indicate_error.right b/shell/hush_test/hush-vars/param_expand_indicate_error.right
index 06fcc5104..acf293893 100644
--- a/shell/hush_test/hush-vars/param_expand_indicate_error.right
+++ b/shell/hush_test/hush-vars/param_expand_indicate_error.right
@@ -1,5 +1,5 @@
hush: syntax error: unterminated ${name}
-0
+1
0
====
_
diff --git a/shell/hush_test/hush-vars/param_expand_indicate_error.tests b/shell/hush_test/hush-vars/param_expand_indicate_error.tests
index be14b1e37..5f946e39a 100755
--- a/shell/hush_test/hush-vars/param_expand_indicate_error.tests
+++ b/shell/hush_test/hush-vars/param_expand_indicate_error.tests
@@ -5,7 +5,7 @@
"$THIS_SH" -c 'echo ${:?}'
# then some funky ones
-# note: bash prints 1 - treats it as "length of $#"? We print 0
+# note: bash prints 1 - treats it as "length of $#"
"$THIS_SH" -c 'echo ${#?}'
# bash prints 0
"$THIS_SH" -c 'echo ${#:?}'