Shell: Redirectiong from multiple-digit fds

Shell/Parser.cpp

@@ -103,6 +103,51 @@ Vector<Command> Parser::parse()
  m_state = State::InDoubleQuotes;
  break;
  }
+
+ // redirection from zsh-style multi-digit fd, such as {10}>file
+ if (ch == '{') {
+ bool is_multi_fd_redirection = false;
+ int redir_end = i + 1;
+
+ while (redir_end < m_input.length()) {
+ char lookahead_ch = m_input.characters()[redir_end];
+ if (isdigit(lookahead_ch)) {
+ ++redir_end;
+ continue;
+ }
+ if (lookahead_ch == '}' && redir_end + 1 != m_input.length()) {
+ // Disallow {}> and {}<
+ if (redir_end == i + 1)
+ break;
+
+ ++redir_end;
+ if (m_input.characters()[redir_end] == '>' || m_input.characters()[redir_end] == '<')
+ is_multi_fd_redirection = true;
+ break;
+ }
+ break;
+ }
+
+ if (is_multi_fd_redirection) {
+ commit_token();
+
+ int fd = atoi(&m_input.characters()[i + 1]);
+
+ if (m_input.characters()[redir_end] == '>') {
+ begin_redirect_write(fd);
+ // Search for another > for append.
+ m_state = State::InWriteAppendOrRedirectionPath;
+ }
+ if (m_input.characters()[redir_end] == '<') {
+ begin_redirect_read(fd);
+ m_state = State::InRedirectionPath;
+ }
+
+ i = redir_end;
+
+ break;
+ }
+ }
  if (isdigit(ch)) {
  if (i != m_input.length() - 1) {
  char next_ch = m_input.characters()[i + 1];