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kill all jobs when exiting an interactive shell

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Fish is not consistent with other shells like bash and zsh when exiting
an interactive shell with background jobs. While it is true that fish
explicitly claims no compatibility with POSIX 1003.1 this is an area
where deviation from the established practice adds negative value.

The reason for the current behavior seems to be due to two users who did
not understand why interactive shells managed background jobs as they
did and were not aware of tools like `nohup` or `disown`. See issue

There is also a fairly significant bug present due to a misunderstanding of
what a true value from `reader_exit_forced()` means. This change corrects
that misunderstanding.

Fixes #3497
This commit is contained in:
Kurtis Rader 2016-12-17 20:21:27 -08:00
parent 9f8d854c2a
commit 8d27f81a7b
1 changed files with 15 additions and 23 deletions
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38
src/reader.cpp
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@ -2222,45 +2222,37 @@ bool shell_is_exiting() {
/// This function is called when the main loop notices that end_loop has been set while in
/// interactive mode. It checks if it is ok to exit.
static void handle_end_loop() {
job_t *j;
int stopped_jobs_count = 0;
int is_breakpoint = 0;
bool bg_jobs = false;
bool is_breakpoint = false;
const parser_t &parser = parser_t::principal_parser();
for (size_t i = 0; i < parser.block_count(); i++) {
if (parser.block_at_index(i)->type() == BREAKPOINT) {
is_breakpoint = 1;
is_breakpoint = true;
break;
}
}
job_iterator_t jobs;
while ((j = jobs.next())) {
if (!job_is_completed(j) && (job_is_stopped(j))) {
stopped_jobs_count++;
while (job_t *j = jobs.next()) {
if (!job_is_completed(j)) {
bg_jobs = true;
break;
}
}
if (!reader_exit_forced() && !data->prev_end_loop && stopped_jobs_count && !is_breakpoint) {
writestr(_(
L"There are stopped jobs. A second attempt to exit will enforce their termination.\n"));
if (!reader_exit_forced() && !data->prev_end_loop && bg_jobs && !is_breakpoint) {
writestr(_(L"There are stopped or running jobs.\n"));
writestr(_(L"A second attempt to exit will force their termination.\n"));
reader_exit(0, 0);
data->prev_end_loop = 1;
} else {
// PCA: We used to only hangup jobs if stdin was closed. This prevented child processes from
// exiting. It's unclear to my why it matters if stdin is closed, but it seems to me if
// we're forcing an exit, we definitely want to hang up our processes. See issue #138.
if (reader_exit_forced() || !isatty(0)) {
// We already know that stdin is a tty since we're in interactive mode. If isatty
// returns false, it means stdin must have been closed.
job_iterator_t jobs;
while ((j = jobs.next())) {
// Send SIGHUP only to foreground processes. See issue #1771.
if (!job_is_completed(j) && job_get_flag(j, JOB_FOREGROUND)) {
job_signal(j, SIGHUP);
}
// Kill background jobs.
job_iterator_t jobs;
while (job_t *j = jobs.next()) {
if (!job_is_completed(j)) {
if (job_is_stopped(j)) job_signal(j, SIGCONT);
job_signal(j, SIGHUP);
}
}
}