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715e11f692
This patchset makes the shell capable of lazily resolving and executing sequences of commands, to allow for putting logical sequences in the background. In particular, it enables And/Or/Sequence nodes to be run in the background, and consequently unmarks them as `would_execute`. Doing so also fixes job control to an extent, as jobs are now capable of having 'tails', so sequences can be put in the background while preserving their following sequences.
112 lines
3.2 KiB
C++
112 lines
3.2 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "Job.h"
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#include "AST.h"
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#include "Shell.h"
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#include <inttypes.h>
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#include <stdio.h>
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#include <sys/wait.h>
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bool Job::print_status(PrintStatusMode mode)
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{
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int wstatus;
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auto rc = waitpid(m_pid, &wstatus, WNOHANG);
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if (rc == -1) {
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perror("waitpid");
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return false;
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}
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auto status = "running";
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if (rc != 0) {
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if (WIFEXITED(wstatus))
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status = "exited";
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if (WIFSTOPPED(wstatus))
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status = "stopped";
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if (WIFSIGNALED(wstatus))
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status = "signaled";
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}
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char background_indicator = '-';
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if (is_running_in_background())
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background_indicator = '+';
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switch (mode) {
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case PrintStatusMode::Basic:
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printf("[%" PRIu64 "] %c %s %s\n", m_job_id, background_indicator, status, m_cmd.characters());
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break;
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case PrintStatusMode::OnlyPID:
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printf("[%" PRIu64 "] %c %d %s %s\n", m_job_id, background_indicator, m_pid, status, m_cmd.characters());
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break;
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case PrintStatusMode::ListAll:
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printf("[%" PRIu64 "] %c %d %d %s %s\n", m_job_id, background_indicator, m_pid, m_pgid, status, m_cmd.characters());
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break;
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}
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return true;
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}
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Job::Job(pid_t pid, unsigned pgid, String cmd, u64 job_id, AST::Command&& command)
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: m_pgid(pgid)
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, m_pid(pid)
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, m_job_id(job_id)
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, m_cmd(move(cmd))
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{
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m_command = make<AST::Command>(move(command));
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set_running_in_background(false);
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m_command_timer.start();
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}
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void Job::set_has_exit(int exit_code)
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{
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if (m_exited)
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return;
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m_exit_code = exit_code;
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m_exited = true;
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if (on_exit)
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on_exit(*this);
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}
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void Job::set_signalled(int sig)
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{
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if (m_exited)
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return;
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m_exited = true;
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m_exit_code = 126;
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m_term_sig = sig;
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if (on_exit)
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on_exit(*this);
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}
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void Job::unblock() const
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{
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if (!m_exited && on_exit)
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on_exit(*this);
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}
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