mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-08 13:29:59 -05:00
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
|
/***
|
||
|
|
This file is part of PulseAudio.
|
||
|
|
|
||
|
|
Copyright 2016 Ahmed S. Darwish <darwish.07@gmail.com>
|
||
|
|
|
||
|
|
PulseAudio is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU Lesser General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2.1 of the
|
||
|
|
License, or (at your option) any later version.
|
||
|
|
|
||
|
|
PulseAudio is distributed in the hope that it will be useful, but
|
||
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
|
||
|
|
***/
|
||
|
|
|
||
|
|
#ifdef HAVE_CONFIG_H
|
||
|
|
#include <config.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <pulsecore/core-util.h>
|
||
|
|
#include <pulsecore/creds.h>
|
||
|
|
#include <pulsecore/macro.h>
|
||
|
|
#include <pulsecore/pdispatch.h>
|
||
|
|
#include <pulsecore/pstream.h>
|
||
|
|
#include <pulsecore/tagstruct.h>
|
||
|
|
|
||
|
|
#include "native-common.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Command handlers shared between client and server
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Check pa_pstream_register_memfd_mempool() for further details */
|
||
|
|
int pa_common_command_register_memfd_shmid(pa_pstream *p, pa_pdispatch *pd, uint32_t version,
|
||
|
|
uint32_t command, pa_tagstruct *t) {
|
||
|
|
#if defined(HAVE_CREDS) && defined(HAVE_MEMFD)
|
||
|
|
pa_cmsg_ancil_data *ancil = NULL;
|
||
|
|
unsigned shm_id;
|
||
|
|
int ret = -1;
|
||
|
|
|
||
|
|
pa_assert(pd);
|
||
|
|
pa_assert(command == PA_COMMAND_REGISTER_MEMFD_SHMID);
|
||
|
|
pa_assert(t);
|
||
|
|
|
||
|
|
ancil = pa_pdispatch_take_ancil_data(pd);
|
||
|
|
if (!ancil)
|
||
|
|
goto finish;
|
||
|
|
|
||
|
|
/* Upon fd leaks and reaching our open fd limit, recvmsg(2)
|
||
|
|
* just strips all passed fds from the ancillary data */
|
||
|
|
if (ancil->nfd == 0) {
|
||
|
|
pa_log("Expected 1 memfd fd to be received over pipe; got 0");
|
||
|
|
pa_log("Did we reach our open file descriptors limit?");
|
||
|
|
goto finish;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ancil->nfd != 1 || ancil->fds[0] == -1)
|
||
|
|
goto finish;
|
||
|
|
|
||
|
|
if (version < 31 || pa_tagstruct_getu32(t, &shm_id) < 0 || !pa_tagstruct_eof(t))
|
||
|
|
goto finish;
|
||
|
|
|
||
|
|
pa_pstream_attach_memfd_shmid(p, shm_id, ancil->fds[0]);
|
||
|
|
|
||
|
|
ret = 0;
|
||
|
|
finish:
|
||
|
|
if (ancil)
|
||
|
|
pa_cmsg_ancil_data_close_fds(ancil);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
#else
|
||
|
|
return -1;
|
||
|
|
#endif
|
||
|
|
}
|