i3-dump-log -f: switch from pthreads to UNIX sockets

fixes #4117

include/i3-atoms_rest.xmacro.h

@@ -15,6 +15,7 @@ xmacro(I3_CONFIG_PATH) \
 xmacro(I3_SYNC) \
 xmacro(I3_SHMLOG_PATH) \
 xmacro(I3_PID) \
+xmacro(I3_LOG_STREAM_SOCKET_PATH) \
 xmacro(I3_FLOATING_WINDOW) \
 xmacro(_NET_REQUEST_FRAME_EXTENTS) \
 xmacro(_NET_FRAME_EXTENTS) \

include/ipc.h

@@ -80,13 +80,6 @@ void ipc_new_client(EV_P_ struct ev_io *w, int revents);
  */
 ipc_client *ipc_new_client_on_fd(EV_P_ int fd);
 
-/**
- * Creates the UNIX domain socket at the given path, sets it to non-blocking
- * mode, bind()s and listen()s on it.
- *
- */
-int ipc_create_socket(const char *filename);
-
 /**
  * Sends the specified event to all IPC clients which are currently connected
  * and subscribed to this kind of event.

include/log.h

@@ -10,6 +10,7 @@
 #pragma once
 
 #include <config.h>
+#include <ev.h>
 
 /* We will include libi3.h which define its own version of LOG, ELOG.
  * We want *our* version, so we undef the libi3 one. */
@@ -31,6 +32,7 @@
 extern char *errorfilename;
 extern char *shmlogname;
 extern int shmlog_size;
+extern char *current_log_stream_socket_path;
 
 /**
  * Initializes logging by creating an error logfile in /tmp (or
@@ -100,3 +102,5 @@ void verboselog(char *fmt, ...)
  * failures. This function is invoked automatically when exiting.
  */
 void purge_zerobyte_logfile(void);
+
+void log_new_client(EV_P_ struct ev_io *w, int revents);

include/shmlog.h

@@ -12,10 +12,6 @@
 
 #include <config.h>
 
-#if !defined(__OpenBSD__)
-#include <pthread.h>
-#endif
-
 /* Default shmlog size if not set by user. */
 extern const int default_shmlog_size;
 
@@ -39,11 +35,4 @@ typedef struct i3_shmlog_header {
      * coincidentally be exactly the same as previously). Overflows can happen
      * and don’t matter — clients use an equality check (==). */
     uint32_t wrap_count;
-
-#if !defined(__OpenBSD__)
-    /* pthread condvar which will be broadcasted whenever there is a new
-     * message in the log. i3-dump-log uses this to implement -f (follow, like
-     * tail -f) in an efficient way. */
-    pthread_cond_t condvar;
-#endif
 } i3_shmlog_header;