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Implement socket activation without libsystemd

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Socket activation uses sd_listen_fds from libsystemd, and can only be
compiled on systems with systemd.

This is an issue for Alpine / postmarketOS, where upstream has no
systemd package, but downstream depends on upstream's pipewire package
and wants to rely on socket activation. This also prevents using
socket-activation on other non-systemd distributions, including
non-Linux.

Implement equivalent functionality without a dependency on libsystemd.
This commit is contained in:
Hugo Osvaldo Barrera 2026-02-02 22:16:11 +01:00
parent 2c0988ab4c
commit 57efceeb02
4 changed files with 82 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

15
src/modules/module-protocol-native.c
View file

@ -34,10 +34,6 @@
#include <spa/utils/json.h>
#include <spa/debug/log.h>
#ifdef HAVE_SYSTEMD
#include <systemd/sd-daemon.h>
#endif
#ifdef HAVE_SELINUX
#include <selinux/selinux.h>
#endif
@ -45,6 +41,7 @@
#include <pipewire/impl.h>
#include <pipewire/extensions/protocol-native.h>
#include "network-utils.h"
#include "pipewire/private.h"
#include "modules/module-protocol-native/connection.h"
@ -909,13 +906,12 @@ static int add_socket(struct pw_protocol *protocol, struct server *s, struct soc
int fd = -1, res;
bool activated = false;
#ifdef HAVE_SYSTEMD
{
int i, n = sd_listen_fds(0);
int i, n = listen_fd();
for (i = 0; i < n; ++i) {
if (sd_is_socket_unix(SD_LISTEN_FDS_START + i, SOCK_STREAM,
1, s->addr.sun_path, 0) > 0) {
fd = SD_LISTEN_FDS_START + i;
if (is_socket_unix(LISTEN_FDS_START + i, SOCK_STREAM,
s->addr.sun_path) > 0) {
fd = LISTEN_FDS_START + i;
activated = true;
pw_log_info("server %p: Found socket activation socket for '%s'",
s, s->addr.sun_path);
@ -923,7 +919,6 @@ static int add_socket(struct pw_protocol *protocol, struct server *s, struct soc
}
}
}
#endif
if (fd < 0) {
struct stat socket_stat;