void do_job_notification(pid_t pid) {
process *p, *q;
/* Update status information for child processes. */
update_status();
for(p = first_process; p; p = q) {
q = p->next;
if(pid == 0 || pid == p->pid) {
/* if all processes have completed, tell the user
* the job has completed and delete it from the list of active jobs. */
if(p->completed) {
format_job_info(p, "completed");
remove_process(p);
free(p);
}
else if(p->stopped) {
format_job_info(p, "stopped");
}
/* Don't day anything about jobs that are still running. */
else {
format_job_info(p, "running");
}
}
}
}
/* Notify the user about stopped or terminated jobs.
Delete terminated jobs from the active job list. */
void do_job_notification (void) {
job *j, *jlast, *jnext;
process *p;
/* Update status information for child processes. */
update_status ();
jlast = NULL;
for (j = first_job; j; j = jnext) {
jnext = j->next;
/* If all processes have completed, tell the user the job has
completed and delete it from the list of active jobs. */
if (job_is_completed (j)) {
format_job_info (j, "completed");
if (jlast)
jlast->next = jnext;
else
first_job = jnext;
free_job (j);
}
/* Notify the user about stopped jobs,
marking them so that we won’t do this more than once. */
else if (job_is_stopped (j) && !j->notified) {
format_job_info (j, "stopped");
j->notified = 1;
jlast = j;
}
/* Don’t say anything about jobs that are still running. */
else
jlast = j;
}
}
void launch_job (job *j, int foreground) {
process *p;
pid_t pid;
int mypipe[2], infile, outfile;
infile = j->stdin;
for (p = j->first_process; p; p = p->next) {
/* Set up pipes, if necessary. */
if (p->next) {
if (pipe (mypipe) < 0) {
perror ("pipe");
exit (1);
}
outfile = mypipe[1];
}
else
outfile = j->stdout;
/* Fork the child processes. */
pid = fork ();
if (pid == 0)
/* This is the child process. */
launch_process (p, j->pgid, infile, outfile, j->stderr, foreground);
else if (pid < 0) {
/* The fork failed. */
perror ("fork");
exit (1);
}
else {
/* This is the parent process. */
p->pid = pid;
if (shell_is_interactive) {
if (!j->pgid)
j->pgid = pid;
setpgid (pid, j->pgid);
}
}
/* Clean up after pipes. */
if (infile != j->stdin)
close (infile);
if (outfile != j->stdout)
close (outfile);
infile = mypipe[0];
}
format_job_info (j, "launched");
if (!shell_is_interactive)
wait_for_job (j);
else if (foreground)
put_job_in_foreground (j, 0);
else
put_job_in_background (j, 0);
}
int job_reap( bool interactive )
{
ASSERT_IS_MAIN_THREAD();
job_t *jnext;
int found=0;
static int locked = 0;
locked++;
/*
job_read may fire an event handler, we do not want to call
ourselves recursively (to avoid infinite recursion).
*/
if( locked>1 )
return 0;
job_iterator_t jobs;
jnext = jobs.next();
while (jnext)
{
job_t *j = jnext;
jnext = jobs.next();
process_t *p;
/*
If we are reaping only jobs who do not need status messages
sent to the console, do not consider reaping jobs that need
status messages
*/
if( (!job_get_flag( j, JOB_SKIP_NOTIFICATION ) ) && (!interactive) && (!job_get_flag( j, JOB_FOREGROUND )))
{
continue;
}
for( p=j->first_process; p; p=p->next )
{
int s;
if( !p->completed )
continue;
if( !p->pid )
continue;
s = p->status;
proc_fire_event( L"PROCESS_EXIT", EVENT_EXIT, p->pid, ( WIFSIGNALED(s)?-1:WEXITSTATUS( s )) );
if( WIFSIGNALED(s) )
{
/*
Ignore signal SIGPIPE.We issue it ourselves to the pipe
writer when the pipe reader dies.
*/
if( WTERMSIG(s) != SIGPIPE )
{
int proc_is_job = ((p==j->first_process) && (p->next == 0));
if( proc_is_job )
job_set_flag( j, JOB_NOTIFIED, 1 );
if( !job_get_flag( j, JOB_SKIP_NOTIFICATION ) )
{
if( proc_is_job )
fwprintf( stdout,
_( L"%ls: Job %d, \'%ls\' terminated by signal %ls (%ls)" ),
program_name,
j->job_id,
j->command_wcstr(),
sig2wcs(WTERMSIG(p->status)),
signal_get_desc( WTERMSIG(p->status) ) );
else
fwprintf( stdout,
_( L"%ls: Process %d, \'%ls\' from job %d, \'%ls\' terminated by signal %ls (%ls)" ),
program_name,
p->pid,
p->argv0(),
j->job_id,
j->command_wcstr(),
sig2wcs(WTERMSIG(p->status)),
signal_get_desc( WTERMSIG(p->status) ) );
tputs(clr_eol,1,&writeb);
fwprintf (stdout, L"\n" );
found=1;
}
/*
Clear status so it is not reported more than once
*/
p->status = 0;
}
}
}
/*
If all processes have completed, tell the user the job has
completed and delete it from the active job list.
*/
if( job_is_completed( j ) )
{
if( !job_get_flag( j, JOB_FOREGROUND) && !job_get_flag( j, JOB_NOTIFIED ) && !job_get_flag( j, JOB_SKIP_NOTIFICATION ) )
{
format_job_info( j, _( L"ended" ) );
found=1;
}
proc_fire_event( L"JOB_EXIT", EVENT_EXIT, -j->pgid, 0 );
proc_fire_event( L"JOB_EXIT", EVENT_JOB_ID, j->job_id, 0 );
job_free(j);
}
else if( job_is_stopped( j ) && !job_get_flag( j, JOB_NOTIFIED ) )
{
/*
Notify the user about newly stopped jobs.
*/
if( !job_get_flag( j, JOB_SKIP_NOTIFICATION ) )
{
format_job_info( j, _( L"stopped" ) );
found=1;
}
job_set_flag( j, JOB_NOTIFIED, 1 );
}
}
if( found )
fflush( stdout );
locked = 0;
return found;
}
void sh_launch_job(job_t *job, int foreground)
{
process_t *p; /* Process iteration */
pid_t pid; /* PID for the newly spawned process */
int output; /* Output file descriptor */
int input = job->stdin; /* Input file descriptor */
int iopipe[2] = {STDIN_FILENO, STDOUT_FILENO}; /* Inter-process comms pipe */
for (p = job->first_process; p != NULL; p = p->next) {
/* Set up pipes if applicable, set output */
if (p->next != NULL) {
check(pipe(iopipe) >= 0);
output = iopipe[1];
} else {
output = job->stdout;
}
/* Fork child process and launch */
check((pid = fork()) >= 0);
if (pid == 0) {
/* I am the fork */
sh_launch_process(p, job->pgid, input, output,
job->stderr, foreground);
} else {
/* I am parent */
p->pid = pid;
if (shell_interactive) {
/*
* if (job->pgid == 0)
* job->pgid = pid;
*
* MAN specifies that if pgid is 0, pid of
* indicated process (pid) shall be used.
*/
setpgid(pid, job->pgid);
}
}
/* Clean up the pipes, set input */
if (input != job->stdin)
close(input);
if (output != job->stdout)
close(output);
input = iopipe[0];
}
format_job_info(job, "launched");
/* Either wait until job is finished, or engage new */
if (!shell_interactive)
job_wait_blocked(job);
else if (foreground)
put_in_foreground(job, 0);
else
put_in_background(job, 0);
}
static int process_clean_after_marking(bool allow_interactive) {
ASSERT_IS_MAIN_THREAD();
job_t *jnext;
int found = 0;
// this function may fire an event handler, we do not want to call ourselves recursively (to avoid
// infinite recursion).
static bool locked = false;
if (locked) {
return 0;
}
locked = true;
// this may be invoked in an exit handler, after the TERM has been torn down
// don't try to print in that case (#3222)
const bool interactive = allow_interactive && cur_term != NULL;
job_iterator_t jobs;
const size_t job_count = jobs.count();
jnext = jobs.next();
while (jnext) {
job_t *j = jnext;
jnext = jobs.next();
// If we are reaping only jobs who do not need status messages sent to the console, do not
// consider reaping jobs that need status messages.
if ((!j->get_flag(JOB_SKIP_NOTIFICATION)) && (!interactive) &&
(!j->get_flag(JOB_FOREGROUND))) {
continue;
}
for (const process_ptr_t &p : j->processes) {
int s;
if (!p->completed) continue;
if (!p->pid) continue;
s = p->status;
// TODO: The generic process-exit event is useless and unused.
// Remove this in future.
proc_fire_event(L"PROCESS_EXIT", EVENT_EXIT, p->pid,
(WIFSIGNALED(s) ? -1 : WEXITSTATUS(s)));
// Ignore signal SIGPIPE.We issue it ourselves to the pipe writer when the pipe reader
// dies.
if (!WIFSIGNALED(s) || WTERMSIG(s) == SIGPIPE) {
continue;
}
// Handle signals other than SIGPIPE.
int proc_is_job = (p->is_first_in_job && p->is_last_in_job);
if (proc_is_job) j->set_flag(JOB_NOTIFIED, true);
if (j->get_flag(JOB_SKIP_NOTIFICATION)) {
continue;
}
// Print nothing if we get SIGINT in the foreground process group, to avoid spamming
// obvious stuff on the console (#1119). If we get SIGINT for the foreground
// process, assume the user typed ^C and can see it working. It's possible they
// didn't, and the signal was delivered via pkill, etc., but the SIGINT/SIGTERM
// distinction is precisely to allow INT to be from a UI
// and TERM to be programmatic, so this assumption is keeping with the design of
// signals. If echoctl is on, then the terminal will have written ^C to the console.
// If off, it won't have. We don't echo ^C either way, so as to respect the user's
// preference.
if (WTERMSIG(p->status) != SIGINT || !j->get_flag(JOB_FOREGROUND)) {
if (proc_is_job) {
// We want to report the job number, unless it's the only job, in which case
// we don't need to.
const wcstring job_number_desc =
(job_count == 1) ? wcstring() : format_string(_(L"Job %d, "), j->job_id);
fwprintf(stdout, _(L"%ls: %ls\'%ls\' terminated by signal %ls (%ls)"),
program_name, job_number_desc.c_str(),
truncate_command(j->command()).c_str(), sig2wcs(WTERMSIG(p->status)),
signal_get_desc(WTERMSIG(p->status)));
} else {
const wcstring job_number_desc =
(job_count == 1) ? wcstring() : format_string(L"from job %d, ", j->job_id);
const wchar_t *fmt =
_(L"%ls: Process %d, \'%ls\' %ls\'%ls\' terminated by signal %ls (%ls)");
fwprintf(stdout, fmt, program_name, p->pid, p->argv0(), job_number_desc.c_str(),
truncate_command(j->command()).c_str(), sig2wcs(WTERMSIG(p->status)),
signal_get_desc(WTERMSIG(p->status)));
}
if (cur_term != NULL) {
tputs(clr_eol, 1, &writeb);
} else {
fwprintf(stdout, L"\e[K"); // no term set up - do clr_eol manually
}
fwprintf(stdout, L"\n");
}
found = 1;
p->status = 0; // clear status so it is not reported more than once
}
// If all processes have completed, tell the user the job has completed and delete it from
// the active job list.
if (job_is_completed(j)) {
if (!j->get_flag(JOB_FOREGROUND) && !j->get_flag(JOB_NOTIFIED) &&
!j->get_flag(JOB_SKIP_NOTIFICATION)) {
format_job_info(j, JOB_ENDED);
found = 1;
}
// TODO: The generic process-exit event is useless and unused.
// Remove this in future.
// Don't fire the exit-event for jobs with pgid -2.
// That's our "sentinel" pgid, for jobs that don't (yet) have a pgid,
// or jobs that consist entirely of builtins (and hence don't have a process).
// This causes issues if fish is PID 2, which is quite common on WSL. See #4582.
if (j->pgid != -2) {
proc_fire_event(L"JOB_EXIT", EVENT_EXIT, -j->pgid, 0);
}
proc_fire_event(L"JOB_EXIT", EVENT_JOB_ID, j->job_id, 0);
job_remove(j);
} else if (job_is_stopped(j) && !j->get_flag(JOB_NOTIFIED)) {
// Notify the user about newly stopped jobs.
if (!j->get_flag(JOB_SKIP_NOTIFICATION)) {
format_job_info(j, JOB_STOPPED);
found = 1;
}
j->set_flag(JOB_NOTIFIED, true);
}
}
if (found) fflush(stdout);
locked = false;
return found;
}
int job_reap(bool interactive)
{
ASSERT_IS_MAIN_THREAD();
job_t *jnext;
int found=0;
/* job_reap may fire an event handler, we do not want to call ourselves recursively (to avoid infinite recursion). */
static bool locked = false;
if (locked)
{
return 0;
}
locked = true;
process_mark_finished_children(false);
/* Preserve the exit status */
const int saved_status = proc_get_last_status();
job_iterator_t jobs;
const size_t job_count = jobs.count();
jnext = jobs.next();
while (jnext)
{
job_t *j = jnext;
jnext = jobs.next();
/*
If we are reaping only jobs who do not need status messages
sent to the console, do not consider reaping jobs that need
status messages
*/
if ((!job_get_flag(j, JOB_SKIP_NOTIFICATION)) && (!interactive) && (!job_get_flag(j, JOB_FOREGROUND)))
{
continue;
}
for (process_t *p = j->first_process; p; p=p->next)
{
int s;
if (!p->completed)
continue;
if (!p->pid)
continue;
s = p->status;
proc_fire_event(L"PROCESS_EXIT", EVENT_EXIT, p->pid, (WIFSIGNALED(s)?-1:WEXITSTATUS(s)));
if (WIFSIGNALED(s))
{
/*
Ignore signal SIGPIPE.We issue it ourselves to the pipe
writer when the pipe reader dies.
*/
if (WTERMSIG(s) != SIGPIPE)
{
int proc_is_job = ((p==j->first_process) && (p->next == 0));
if (proc_is_job)
job_set_flag(j, JOB_NOTIFIED, 1);
if (!job_get_flag(j, JOB_SKIP_NOTIFICATION))
{
/* Print nothing if we get SIGINT in the foreground process group, to avoid spamming obvious stuff on the console (#1119). If we get SIGINT for the foreground process, assume the user typed ^C and can see it working. It's possible they didn't, and the signal was delivered via pkill, etc., but the SIGINT/SIGTERM distinction is precisely to allow INT to be from a UI and TERM to be programmatic, so this assumption is keeping with the design of signals.
If echoctl is on, then the terminal will have written ^C to the console. If off, it won't have. We don't echo ^C either way, so as to respect the user's preference. */
if (WTERMSIG(p->status) != SIGINT || ! job_get_flag(j, JOB_FOREGROUND))
{
if (proc_is_job)
{
// We want to report the job number, unless it's the only job, in which case we don't need to
const wcstring job_number_desc = (job_count == 1) ? wcstring() : format_string(L"Job %d, ", j->job_id);
fwprintf(stdout,
_(L"%ls: %ls\'%ls\' terminated by signal %ls (%ls)"),
program_name,
job_number_desc.c_str(),
truncate_command(j->command()).c_str(),
sig2wcs(WTERMSIG(p->status)),
signal_get_desc(WTERMSIG(p->status)));
}
else
{
const wcstring job_number_desc = (job_count == 1) ? wcstring() : format_string(L"from job %d, ", j->job_id);
fwprintf(stdout,
_(L"%ls: Process %d, \'%ls\' %ls\'%ls\' terminated by signal %ls (%ls)"),
program_name,
p->pid,
p->argv0(),
job_number_desc.c_str(),
truncate_command(j->command()).c_str(),
sig2wcs(WTERMSIG(p->status)),
signal_get_desc(WTERMSIG(p->status)));
}
tputs(clr_eol,1,&writeb);
fwprintf(stdout, L"\n");
}
found=1;
}
/*
Clear status so it is not reported more than once
*/
p->status = 0;
}
}
}
/*
If all processes have completed, tell the user the job has
completed and delete it from the active job list.
*/
if (job_is_completed(j))
{
if (!job_get_flag(j, JOB_FOREGROUND) && !job_get_flag(j, JOB_NOTIFIED) && !job_get_flag(j, JOB_SKIP_NOTIFICATION))
{
format_job_info(j, _(L"ended"), job_count);
found=1;
}
proc_fire_event(L"JOB_EXIT", EVENT_EXIT, -j->pgid, 0);
proc_fire_event(L"JOB_EXIT", EVENT_JOB_ID, j->job_id, 0);
job_free(j);
}
else if (job_is_stopped(j) && !job_get_flag(j, JOB_NOTIFIED))
{
/*
Notify the user about newly stopped jobs.
*/
if (!job_get_flag(j, JOB_SKIP_NOTIFICATION))
{
format_job_info(j, _(L"stopped"), job_count);
found=1;
}
job_set_flag(j, JOB_NOTIFIED, 1);
}
}
if (found)
fflush(stdout);
/* Restore the exit status. */
proc_set_last_status(saved_status);
locked = false;
return found;
}