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bin: diagnose failures to print --help

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Fixes #349.

* bin/common_setup.cc (OPT_HELP, OPT_VERSION): Call close_stdout().
This commit is contained in:
Alexandre Duret-Lutz 2018-05-17 16:59:17 +02:00
parent a80cd361c0
commit 2f8ae55f6b
1 changed files with 9 additions and 1 deletions
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10
bin/common_setup.cc
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@ -21,6 +21,7 @@
#include "common_aoutput.hh"
#include "argp.h"
#include "closeout.h"
#include <cstdlib>
#include <unistd.h>
#include <iostream>
@ -147,10 +148,17 @@ parse_opt_misc(int key, char*, struct argp_state* state)
switch (key)
{
case OPT_HELP:
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
argp_state_help(state, state->out_stream,
// Do not let argp exit: we want to diagnose a
// failure to print --help by closing stdout
// properly.
ARGP_HELP_STD_HELP & ~ARGP_HELP_EXIT_OK);
close_stdout();
exit(0);
break;
case OPT_VERSION:
display_version(state->out_stream, state);
close_stdout();
exit(0);
break;
default: