diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/shell/hush.c b/shell/hush.c index 7c2f157..336de75 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -3915,12 +3915,17 @@ static int parse_group(o_string *dest, struct parse_context *ctx, command->cmd_type = CMD_SUBSHELL; } else { /* bash does not allow "{echo...", requires whitespace */ - ch = i_getch(input); - if (ch != ' ' && ch != '\t' && ch != '\n') { + ch = i_peek(input); + if (ch != ' ' && ch != '\t' && ch != '\n' + && ch != '(' /* but "{(..." is allowed (without whitespace) */ + ) { syntax_error_unexpected_ch(ch); return 1; } - nommu_addchr(&ctx->as_string, ch); + if (ch != '(') { + ch = i_getch(input); + nommu_addchr(&ctx->as_string, ch); + } } { @@ -4575,6 +4580,7 @@ static struct pipe *parse_stream(char **pstring, || dest.has_quoted_part /* ""{... - non-special */ || (next != ';' /* }; - special */ && next != ')' /* }) - special */ + && next != '(' /* {( - special */ && next != '&' /* }& and }&& ... - special */ && next != '|' /* }|| ... - special */ && !strchr(defifs, next) /* {word - non-special */ @@ -4657,17 +4663,31 @@ static struct pipe *parse_stream(char **pstring, * Pathological example: { ""}; } should exec "}" cmd */ if (ch == '}') { - if (!IS_NULL_CMD(ctx.command) /* cmd } */ - || dest.length != 0 /* word} */ + if (dest.length != 0 /* word} */ || dest.has_quoted_part /* ""} */ ) { goto ordinary_char; } + if (!IS_NULL_CMD(ctx.command)) { /* cmd } */ + /* Generally, there should be semicolon: "cmd; }" + * However, bash allows to omit it if "cmd" is + * a group. Examples: + * { { echo 1; } } + * {(echo 1)} + * { echo 0 >&2 | { echo 1; } } + * { while false; do :; done } + * { case a in b) ;; esac } + */ + if (ctx.command->group) + goto term_group; + goto ordinary_char; + } if (!IS_NULL_PIPE(ctx.pipe)) /* cmd | } */ + /* Can't be an end of {cmd}, skip the check */ goto skip_end_trigger; /* else: } does terminate a group */ } - + term_group: if (end_trigger && end_trigger == ch && (ch != ';' || heredoc_cnt == 0) #if ENABLE_HUSH_CASE |