diff options
| -rw-r--r-- | shell/hush.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/shell/hush.c b/shell/hush.c index d6f765d6b..ac2410c48 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -2025,18 +2025,20 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask) debug_printf_expand("%s\n", val); } else if (exp_off) { if (exp_op == '%' || exp_op == '#') { - /* we need to do a pattern match */ - bool zero; - char *loc; - scan_t scan = pick_scan(exp_op, *exp_word, &zero); - if (exp_op == *exp_word) /* ## or %% */ - ++exp_word; - val = dyn_val = xstrdup(val); - loc = scan(dyn_val, exp_word, zero); - if (zero) - val = loc; - else - *loc = '\0'; + if (val) { + /* we need to do a pattern match */ + bool zero; + char *loc; + scan_t scan = pick_scan(exp_op, *exp_word, &zero); + if (exp_op == *exp_word) /* ## or %% */ + ++exp_word; + val = dyn_val = xstrdup(val); + loc = scan(dyn_val, exp_word, zero); + if (zero) + val = loc; + else + *loc = '\0'; + } } else { /* we need to do an expansion */ int exp_test = (!val || (exp_null && !val[0])); |