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Shell: Redirectiong from multiple-digit fds

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This commit is contained in:
Karol Baraniecki 2019-12-04 13:31:53 +01:00 • committed by Andreas Kling
parent 7ed8a468ec
commit 431abc8846
Notes: sideshowbarker 2024-07-19 10:57:53 +09:00
1 changed files with 45 additions and 0 deletions
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45
Shell/Parser.cpp
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@ -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];