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Cygwin: FIFO: honor the flags argument in dup

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Also improve the error handling.
This commit is contained in:
Ken Brown 2020-03-25 09:31:29 -04:00
parent 25e8727368
commit 624fda1e96
1 changed files with 33 additions and 27 deletions
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60
winsup/cygwin/fhandler_fifo.cc
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@ -955,56 +955,62 @@ fhandler_fifo::fcntl (int cmd, intptr_t arg)
int
fhandler_fifo::dup (fhandler_base *child, int flags)
{
int ret = -1;
int i = 0;
fhandler_fifo *fhf = NULL;
if (get_flags () & O_PATH)
return fhandler_base::dup (child, flags);
if (fhandler_base::dup (child, flags))
goto out;
goto err;
fhf = (fhandler_fifo *) child;
if (!DuplicateHandle (GetCurrentProcess (), read_ready,
GetCurrentProcess (), &fhf->read_ready,
0, true, DUPLICATE_SAME_ACCESS))
0, !(flags & O_CLOEXEC), DUPLICATE_SAME_ACCESS))
{
fhf->close ();
__seterrno ();
goto out;
goto err;
}
if (!DuplicateHandle (GetCurrentProcess (), write_ready,
GetCurrentProcess (), &fhf->write_ready,
0, true, DUPLICATE_SAME_ACCESS))
0, !(flags & O_CLOEXEC), DUPLICATE_SAME_ACCESS))
{
NtClose (fhf->read_ready);
fhf->close ();
__seterrno ();
goto out;
goto err_close_read_ready;
}
fifo_client_lock ();
for (int i = 0; i < nhandlers; i++)
if (reader)
{
if (!DuplicateHandle (GetCurrentProcess (), fc_handler[i].h,
GetCurrentProcess (),
&fhf->fc_handler[i].h,
0, true, DUPLICATE_SAME_ACCESS))
fifo_client_lock ();
for (i = 0; i < nhandlers; i++)
{
if (!DuplicateHandle (GetCurrentProcess (), fc_handler[i].h,
GetCurrentProcess (), &fhf->fc_handler[i].h,
0, !(flags & O_CLOEXEC), DUPLICATE_SAME_ACCESS))
{
__seterrno ();
break;
}
}
if (i < nhandlers)
{
fifo_client_unlock ();
NtClose (fhf->read_ready);
NtClose (fhf->write_ready);
fhf->close ();
__seterrno ();
goto out;
goto err_close_handlers;
}
fifo_client_unlock ();
if (!fhf->listen_client ())
goto err_close_handlers;
fhf->init_fixup_before ();
}
fifo_client_unlock ();
if (!reader || fhf->listen_client ())
ret = 0;
if (reader)
fhf->init_fixup_before ();
out:
return ret;
return 0;
err_close_handlers:
for (int j = 0; j < i; j++)
fhf->fc_handler[j].close ();
NtClose (fhf->write_ready);
err_close_read_ready:
NtClose (fhf->read_ready);
err:
return -1;
}
void