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implement status is-breakpoint

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This implements `status is-breakpoint` that returns true if the current
shell prompt is displayed in the context of a `breakpoint` command.

This also fixes several bugs. Most notably making `breakpoint` a no-op if
the shell isn't interactive. Also, typing `breakpoint` at an interactive
prompt should be an error rather than creating a new nested debugging
context.

Partial fix for #1310
This commit is contained in:
Kurtis Rader
2017-06-19 21:05:34 -07:00
parent d234a1870b
commit bd299e96b2
15 changed files with 85 additions and 33 deletions
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4
src/exec.cpp
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@@ -1130,7 +1130,7 @@ void exec_job(parser_t &parser, job_t *j) {
static int exec_subshell_internal(const wcstring &cmd, wcstring_list_t *lst,
bool apply_exit_status) {
ASSERT_IS_MAIN_THREAD();
int prev_subshell = is_subshell;
bool prev_subshell = is_subshell;
const int prev_status = proc_get_last_status();
bool split_output = false;
@@ -1139,7 +1139,7 @@ static int exec_subshell_internal(const wcstring &cmd, wcstring_list_t *lst,
split_output = true;
}
is_subshell = 1;
is_subshell = true;
int subcommand_status = -1; // assume the worst
// IO buffer creation may fail (e.g. if we have too many open files to make a pipe), so this may