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Shell: Avoid waiting for jobs that were *just* unblocked

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This fixes the issue with C-z not suspending the job on the first try.
...and further signal issues when the suspended job is contiued.
This commit is contained in:
AnotherTest 2020-07-13 20:29:52 +04:30 committed by Andreas Kling
parent 46661f02c6
commit dc62371439
Notes: sideshowbarker 2024-07-19 04:51:16 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/dc62371439c
Pull-request: https://github.com/SerenityOS/serenity/pull/2790
4 changed files with 14 additions and 4 deletions
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2
Shell/Builtin.cpp
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@ -93,6 +93,7 @@ int Shell::builtin_bg(int argc, const char** argv)
}
job->set_running_in_background(true);
job->set_is_suspended(false);
dbg() << "Resuming " << job->pid() << " (" << job->cmd() << ")";
fprintf(stderr, "Resuming job %" PRIu64 " - %s\n", job->job_id(), job->cmd().characters());
@ -339,6 +340,7 @@ int Shell::builtin_fg(int argc, const char** argv)
}
job->set_running_in_background(false);
job->set_is_suspended(false);
dbg() << "Resuming " << job->pid() << " (" << job->cmd() << ")";
fprintf(stderr, "Resuming job %" PRIu64 " - %s\n", job->job_id(), job->cmd().characters());

4
Shell/Job.h
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@ -75,6 +75,7 @@ public:
bool should_be_disowned() const { return m_should_be_disowned; }
void disown() { m_should_be_disowned = true; }
bool is_running_in_background() const { return m_running_in_background; }
bool is_suspended() const { return m_is_suspended; }
void unblock() const
{
if (!m_exited && on_exit)
@ -94,6 +95,8 @@ public:
on_exit(*this);
}
void set_is_suspended(bool value) const { m_is_suspended = value; }
void set_running_in_background(bool running_in_background)
{
m_running_in_background = running_in_background;
@ -111,5 +114,6 @@ private:
int m_exit_code { -1 };
Core::ElapsedTimer m_command_timer;
mutable bool m_active { true };
mutable bool m_is_suspended { false };
bool m_should_be_disowned { false };
};

8
Shell/Shell.cpp
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@ -561,16 +561,18 @@ Vector<RefPtr<Job>> Shell::run_commands(Vector<AST::Command>& commands)
}
#endif
auto job = run_command(command);
if (!job)
continue;
if (command.should_wait) {
block_on_job(job);
jobs_to_wait_for.append(job);
if (!job->is_suspended())
jobs_to_wait_for.append(job);
} else {
if (command.is_pipe_source) {
jobs_to_wait_for.append(job);
} else if (command.should_notify_if_in_background) {
if (job)
job->set_running_in_background(true);
job->set_running_in_background(true);
restore_stdin();
}
}

4
Shell/main.cpp
View File

@ -121,8 +121,10 @@ int main(int argc, char** argv)
Core::EventLoop::register_signal(SIGTSTP, [](auto) {
auto job = s_shell->current_job();
s_shell->kill_job(job, SIGTSTP);
if (job)
if (job) {
job->set_is_suspended(true);
job->unblock();
}
});
#ifndef __serenity__