void job_continue(job_t *j, bool cont) {
// Put job first in the job list.
job_promote(j);
j->set_flag(JOB_NOTIFIED, false);
CHECK_BLOCK();
debug(4, L"%ls job %d, gid %d (%ls), %ls, %ls", cont ? L"Continue" : L"Start", j->job_id,
j->pgid, j->command_wcstr(), job_is_completed(j) ? L"COMPLETED" : L"UNCOMPLETED",
is_interactive ? L"INTERACTIVE" : L"NON-INTERACTIVE");
if (!job_is_completed(j)) {
if (j->get_flag(JOB_TERMINAL) && j->get_flag(JOB_FOREGROUND)) {
// Put the job into the foreground. Hack: ensure that stdin is marked as blocking first
// (issue #176).
make_fd_blocking(STDIN_FILENO);
if (!terminal_give_to_job(j, cont)) return;
}
// Send the job a continue signal, if necessary.
if (cont) {
for (process_ptr_t &p : j->processes) p->stopped = false;
if (j->get_flag(JOB_CONTROL)) {
if (killpg(j->pgid, SIGCONT)) {
wperror(L"killpg (SIGCONT)");
return;
}
} else {
for (const process_ptr_t &p : j->processes) {
if (kill(p->pid, SIGCONT) < 0) {
wperror(L"kill (SIGCONT)");
return;
}
}
}
}
if (j->get_flag(JOB_FOREGROUND)) {
// Look for finished processes first, to avoid select() if it's already done.
process_mark_finished_children(false);
// Wait for job to report.
while (!reader_exit_forced() && !job_is_stopped(j) && !job_is_completed(j)) {
// debug( 1, L"select_try()" );
switch (select_try(j)) {
case 1: {
read_try(j);
process_mark_finished_children(false);
break;
}
case 0: {
// No FDs are ready. Look for finished processes.
process_mark_finished_children(false);
break;
}
case -1: {
// If there is no funky IO magic, we can use waitpid instead of handling
// child deaths through signals. This gives a rather large speed boost (A
// factor 3 startup time improvement on my 300 MHz machine) on short-lived
// jobs.
//
// This will return early if we get a signal, like SIGHUP.
process_mark_finished_children(true);
break;
}
default: {
DIE("unexpected return value from select_try()");
break;
}
}
}
}
}
if (j->get_flag(JOB_FOREGROUND)) {
if (job_is_completed(j)) {
// It's possible that the job will produce output and exit before we've even read from
// it.
//
// We'll eventually read the output, but it may be after we've executed subsequent calls
// This is why my prompt colors kept getting screwed up - the builtin echo calls
// were sometimes having their output combined with the set_color calls in the wrong
// order!
read_try(j);
const std::unique_ptr<process_t> &p = j->processes.back();
// Mark process status only if we are in the foreground and the last process in a pipe,
// and it is not a short circuited builtin.
if ((WIFEXITED(p->status) || WIFSIGNALED(p->status)) && p->pid) {
int status = proc_format_status(p->status);
// fwprintf(stdout, L"setting status %d for %ls\n", job_get_flag( j, JOB_NEGATE
// )?!status:status, j->command);
proc_set_last_status(j->get_flag(JOB_NEGATE) ? !status : status);
}
}
// Put the shell back in the foreground.
if (j->get_flag(JOB_TERMINAL) && j->get_flag(JOB_FOREGROUND)) {
terminal_return_from_job(j);
}
}
}
void job_continue (job_t *j, int cont)
{
/*
Put job first in the job list
*/
job_promote(j);
job_set_flag( j, JOB_NOTIFIED, 0 );
CHECK_BLOCK();
debug( 4,
L"Continue job %d, gid %d (%ls), %ls, %ls",
j->job_id,
j->pgid,
j->command_wcstr(),
job_is_completed( j )?L"COMPLETED":L"UNCOMPLETED",
is_interactive?L"INTERACTIVE":L"NON-INTERACTIVE" );
if( !job_is_completed( j ) )
{
if( job_get_flag( j, JOB_TERMINAL ) && job_get_flag( j, JOB_FOREGROUND ) )
{
/* Put the job into the foreground. */
int ok;
signal_block();
ok = terminal_give_to_job( j, cont );
signal_unblock();
if( !ok )
return;
}
/*
Send the job a continue signal, if necessary.
*/
if( cont )
{
process_t *p;
for( p=j->first_process; p; p=p->next )
p->stopped=0;
if( job_get_flag( j, JOB_CONTROL ) )
{
if( killpg( j->pgid, SIGCONT ) )
{
wperror( L"killpg (SIGCONT)" );
return;
}
}
else
{
for( p=j->first_process; p; p=p->next )
{
if (kill ( p->pid, SIGCONT) < 0)
{
wperror (L"kill (SIGCONT)");
return;
}
}
}
}
if( job_get_flag( j, JOB_FOREGROUND ) )
{
int quit = 0;
/*
Wait for job to report. Looks a bit ugly because it has to
handle the possibility that a signal is dispatched while
running job_is_stopped().
*/
while( !quit )
{
do
{
got_signal = 0;
quit = job_is_stopped( j ) || job_is_completed( j );
}
while (got_signal && !quit);
if (quit) {
// It's possible that the job will produce output and exit before we've even read from it.
// We'll eventually read the output, but it may be after we've executed subsequent calls
// This is why my prompt colors kept getting screwed up - the builtin echo calls
// were sometimes having their output combined with the set_color calls in the wrong order!
read_try(j);
}
if( !quit )
{
// debug( 1, L"select_try()" );
switch( select_try(j) )
{
case 1:
{
read_try( j );
break;
}
case -1:
{
/*
If there is no funky IO magic, we can use
waitpid instead of handling child deaths
through signals. This gives a rather large
speed boost (A factor 3 startup time
improvement on my 300 MHz machine) on
short-lived jobs.
*/
int status;
pid_t pid = waitpid(-1, &status, WUNTRACED );
if( pid > 0 )
{
handle_child_status( pid, status );
}
else
{
/*
This probably means we got a
signal. A signal might mean that the
terminal emulator sent us a hup
signal to tell is to close. If so,
we should exit.
*/
if( reader_exit_forced() )
{
quit = 1;
}
}
break;
}
}
}
}
}
}
if( job_get_flag( j, JOB_FOREGROUND ) )
{
if( job_is_completed( j ))
{
process_t *p = j->first_process;
while( p->next )
p = p->next;
if( WIFEXITED( p->status ) || WIFSIGNALED(p->status))
{
/*
Mark process status only if we are in the foreground
and the last process in a pipe, and it is not a short circuted builtin
*/
if( p->pid )
{
int status = proc_format_status(p->status);
//wprintf(L"setting status %d for %ls\n", job_get_flag( j, JOB_NEGATE )?!status:status, j->command);
proc_set_last_status( job_get_flag( j, JOB_NEGATE )?!status:status);
}
}
}
/*
Put the shell back in the foreground.
*/
if( job_get_flag( j, JOB_TERMINAL ) && job_get_flag( j, JOB_FOREGROUND ) )
{
int ok;
signal_block();
ok = terminal_return_from_job( j );
signal_unblock();
if( !ok )
return;
}
}
}
void job_continue(job_t *j, bool cont)
{
/*
Put job first in the job list
*/
job_promote(j);
job_set_flag(j, JOB_NOTIFIED, 0);
CHECK_BLOCK();
debug(4,
L"Continue job %d, gid %d (%ls), %ls, %ls",
j->job_id,
j->pgid,
j->command_wcstr(),
job_is_completed(j)?L"COMPLETED":L"UNCOMPLETED",
is_interactive?L"INTERACTIVE":L"NON-INTERACTIVE");
if (!job_is_completed(j))
{
if (job_get_flag(j, JOB_TERMINAL) && job_get_flag(j, JOB_FOREGROUND))
{
/* Put the job into the foreground. Hack: ensure that stdin is marked as blocking first (#176). */
make_fd_blocking(STDIN_FILENO);
signal_block();
bool ok = terminal_give_to_job(j, cont);
signal_unblock();
if (!ok)
return;
}
/*
Send the job a continue signal, if necessary.
*/
if (cont)
{
process_t *p;
for (p=j->first_process; p; p=p->next)
p->stopped=0;
if (job_get_flag(j, JOB_CONTROL))
{
if (killpg(j->pgid, SIGCONT))
{
wperror(L"killpg (SIGCONT)");
return;
}
}
else
{
for (p=j->first_process; p; p=p->next)
{
if (kill(p->pid, SIGCONT) < 0)
{
wperror(L"kill (SIGCONT)");
return;
}
}
}
}
if (job_get_flag(j, JOB_FOREGROUND))
{
/* Look for finished processes first, to avoid select() if it's already done. */
process_mark_finished_children(false);
/*
Wait for job to report.
*/
while (! reader_exit_forced() && ! job_is_stopped(j) && ! job_is_completed(j))
{
// debug( 1, L"select_try()" );
switch (select_try(j))
{
case 1:
{
read_try(j);
process_mark_finished_children(false);
break;
}
case 0:
{
/* No FDs are ready. Look for finished processes. */
process_mark_finished_children(false);
break;
}
case -1:
{
/*
If there is no funky IO magic, we can use
waitpid instead of handling child deaths
through signals. This gives a rather large
speed boost (A factor 3 startup time
improvement on my 300 MHz machine) on
short-lived jobs.
This will return early if we get a signal,
like SIGHUP.
*/
process_mark_finished_children(true);
break;
}
}
}
}
}
if (job_get_flag(j, JOB_FOREGROUND))
{
if (job_is_completed(j))
{
// It's possible that the job will produce output and exit before we've even read from it.
// We'll eventually read the output, but it may be after we've executed subsequent calls
// This is why my prompt colors kept getting screwed up - the builtin echo calls
// were sometimes having their output combined with the set_color calls in the wrong order!
read_try(j);
process_t *p = j->first_process;
while (p->next)
p = p->next;
if (WIFEXITED(p->status) || WIFSIGNALED(p->status))
{
/*
Mark process status only if we are in the foreground
and the last process in a pipe, and it is not a short circuited builtin
*/
if (p->pid)
{
int status = proc_format_status(p->status);
//wprintf(L"setting status %d for %ls\n", job_get_flag( j, JOB_NEGATE )?!status:status, j->command);
proc_set_last_status(job_get_flag(j, JOB_NEGATE)?!status:status);
}
}
}
/* Put the shell back in the foreground. */
if (job_get_flag(j, JOB_TERMINAL) && job_get_flag(j, JOB_FOREGROUND))
{
int ok;
signal_block();
ok = terminal_return_from_job(j);
signal_unblock();
if (!ok)
return;
}
}
}