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-rw-r--r--shell/hush.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 8be0ecf..b639386 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -587,7 +587,7 @@ static int glob_needed(const char *s)
static int is_assignment(const char *s)
{
- if (!s || !isalpha(*s))
+ if (!s || !(isalpha(*s) || *s == '_'))
return 0;
s++;
while (isalnum(*s) || *s == '_')
@@ -3529,22 +3529,24 @@ static int handle_dollar(o_string *dest, struct in_str *input)
debug_printf_parse("handle_dollar entered: ch='%c'\n", ch);
if (isalpha(ch)) {
+ i_getch(input);
+ make_var:
o_addchr(dest, SPECIAL_VAR_SYMBOL);
while (1) {
debug_printf_parse(": '%c'\n", ch);
- i_getch(input);
o_addchr(dest, ch | quote_mask);
quote_mask = 0;
ch = i_peek(input);
if (!isalnum(ch) && ch != '_')
break;
+ i_getch(input);
}
o_addchr(dest, SPECIAL_VAR_SYMBOL);
} else if (isdigit(ch)) {
make_one_char_var:
+ i_getch(input);
o_addchr(dest, SPECIAL_VAR_SYMBOL);
debug_printf_parse(": '%c'\n", ch);
- i_getch(input);
o_addchr(dest, ch | quote_mask);
o_addchr(dest, SPECIAL_VAR_SYMBOL);
} else switch (ch) {
@@ -3586,8 +3588,15 @@ static int handle_dollar(o_string *dest, struct in_str *input)
break;
}
#endif
- case '-':
case '_':
+ i_getch(input);
+ ch = i_peek(input);
+ if (isalnum(ch)) { /* it's $_name or $_123 */
+ ch = '_';
+ goto make_var;
+ }
+ /* else: it's $_ */
+ case '-':
/* still unhandled, but should be eventually */
bb_error_msg("unhandled syntax: $%c", ch);
return 1;