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Shell: Fix job control and backgrounding

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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.
This commit is contained in:
AnotherTest 2020-09-01 08:42:16 +04:30 • committed by Andreas Kling
parent a2a54f459f
commit 715e11f692
10 changed files with 180 additions and 151 deletions
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53
Shell/Job.h
View file

@ -41,9 +41,11 @@
# undef JOB_TIME_INFO
#endif
struct LocalFrame;
class Job : public RefCounted<Job> {
public:
static NonnullRefPtr<Job> create(pid_t pid, pid_t pgid, String command, u64 job_id, AST::Pipeline* pipeline = nullptr) { return adopt(*new Job(pid, pgid, move(command), job_id, pipeline)); }
static NonnullRefPtr<Job> create(pid_t pid, pid_t pgid, String cmd, u64 job_id, AST::Command&& command) { return adopt(*new Job(pid, pgid, move(cmd), job_id, move(command))); }
~Job()
{
@ -53,13 +55,15 @@ public:
dbg() << "Command \"" << m_cmd << "\" finished in " << elapsed << " ms";
}
#endif
if (m_pipeline)
m_pipeline = nullptr;
}
Function<void(RefPtr<Job>)> on_exit;
pid_t pgid() const { return m_pgid; }
pid_t pid() const { return m_pid; }
const String& cmd() const { return m_cmd; }
const AST::Command& command() const { return *m_command; }
AST::Command* command_ptr() { return m_command; }
u64 job_id() const { return m_job_id; }
bool exited() const { return m_exited; }
bool signaled() const { return m_term_sig != -1; }
@ -78,34 +82,12 @@ public:
bool is_running_in_background() const { return m_running_in_background; }
bool should_announce_exit() const { return m_should_announce_exit; }
bool is_suspended() const { return m_is_suspended; }
void unblock() const
{
if (!m_exited && on_exit)
on_exit(*this);
}
Function<void(RefPtr<Job>)> on_exit;
void unblock() const;
Core::ElapsedTimer& timer() { return m_command_timer; }
void set_has_exit(int exit_code)
{
if (m_exited)
return;
m_exit_code = exit_code;
m_exited = true;
if (on_exit)
on_exit(*this);
}
void set_signalled(int sig)
{
if (m_exited)
return;
m_exited = true;
m_exit_code = 126;
m_term_sig = sig;
if (on_exit)
on_exit(*this);
}
void set_has_exit(int exit_code);
void set_signalled(int sig);
void set_is_suspended(bool value) const { m_is_suspended = value; }
@ -127,18 +109,7 @@ public:
bool print_status(PrintStatusMode);
private:
Job(pid_t pid, unsigned pgid, String cmd, u64 job_id, AST::Pipeline* pipeline)
: m_pgid(pgid)
, m_pid(pid)
, m_job_id(job_id)
, m_cmd(move(cmd))
{
if (pipeline)
m_pipeline = *pipeline;
set_running_in_background(false);
m_command_timer.start();
}
Job(pid_t pid, unsigned pgid, String cmd, u64 job_id, AST::Command&& command);
pid_t m_pgid { 0 };
pid_t m_pid { 0 };
@ -153,5 +124,5 @@ private:
mutable bool m_active { true };
mutable bool m_is_suspended { false };
bool m_should_be_disowned { false };
RefPtr<AST::Pipeline> m_pipeline;
OwnPtr<AST::Command> m_command;
};