diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/shell/hush.c b/shell/hush.c index 945077d..6cf8899 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -2649,12 +2649,17 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg, char beg = bb_strtou(exp_word, &end, 0); //bb_error_msg("beg:'%s'=%u end:'%s'", exp_word, beg, end); if (*end == ':') { - len = bb_strtou(end + 1, &end, 0); + if (end[1] != '\0') /* not ${var:NUM:} */ + len = bb_strtou(end + 1, &end, 0); + else { + len = 0; + end++; + } //bb_error_msg("len:%u end:'%s'", len, end); } if (*end == '\0') { //bb_error_msg("from val:'%s'", val); - if (!val || beg >= strlen(val)) + if (len == 0 || !val || beg >= strlen(val)) val = ""; else val = dyn_val = xstrndup(val + beg, len); @@ -2663,6 +2668,7 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg, char #endif { die_if_script("malformed ${%s...}", var); + val = ""; } } else { /* one of "-=+?" */ /* Standard-mandated substitution ops: |