1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
== `exit_code.hpp`
[#exit_code]
The exit code header provides portable handles for exit codes.
[source,cpp]
----
// The native exit-code type, usually an integral value
/* The OS may have a value different from `int` to represent
* the exit codes of subprocesses. It might also
* contain additional information.
*/
typedef implementation_defined native_exit_code_type;
// Check if the native exit code indicates the process is still running
bool process_is_running(native_exit_code_type code);
// Obtain the portable part of the exit code, i.e. what the subprocess has returned from main.
int evaluate_exit_code(native_exit_code_type code);
// Helper to subsume an exit-code into an error_code if there's no actual error isn't set.
error_code check_exit_code(
error_code &ec, native_exit_code_type native_code,
const error_category & category = error::get_exit_code_category());
----
The `check_exit_code` can be used like this:
[source,cpp]
----
process proc{co_await this_coro::executor, "exit", {"1"}};
co_await proc.async_wait(
asio::deferred(
[&proc](error_code ec, int)
{
return asio::deferred.values(
check_exit_code(ec, proc.native_exit_code())
);
----
|
