Re: Porting git to HP NonStop

> Brandon Casey <drafnel@gmail.com> writes:
>
>> Perhaps something like:
>>
>> diff --git a/usage.c b/usage.c
>> index a2a6678..2d0ff35 100644
>> --- a/usage.c
>> +++ b/usage.c
>> @@ -80,8 +80,15 @@ void NORETURN usage(const char *err)
>>
>>  void NORETURN die(const char *err, ...)
>>  {
>> +       static int dying;
>>         va_list params;
>>
>> +       if (dying) {
>> +               fputs("fatal: recursion detected in die handler\n", stderr);
>> +               exit(128);
>> +       }
>> +       dying = 1;
>> +
>>         va_start(params, err);
>>         die_routine(err, params);
>>         va_end(params);
>> @@ -89,11 +96,18 @@ void NORETURN die(const char *err, ...)
>>
>>  void NORETURN die_errno(const char *fmt, ...)
>>  {
>> +       static int dying;
>>         va_list params;
>>         char fmt_with_err[1024];
>>         char str_error[256], *err;
>>         int i, j;
>>
>> +       if (dying) {
>> +               fputs("fatal: recursion detected in die handler\n", stderr);
>> +               exit(128);
>> +       }
>> +       dying = 1;
>> +
>>         err = strerror(errno);
>>         for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) {
>>                 if ((str_error[j++] = err[i++]) != '%')
>
> With two function-scope static, you can go like this:
>
> die()
> -> die_routine()
>    -> xsomething()
>       -> die_errno()
>         -> die_routine()
>            -> xsomethingelse()
>               -> die() or die_errno()
>
> Not that we probably care too deeply about, as at least we won't
> infinitely recurse and die out of stack space.