on systems where we know that POSIX shm is mapped to /dev/shm, add the ability to cleanup stale SHM segments. (Right now only Linux)

git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1810 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/daemon/cmdline.c

@@ -64,7 +64,8 @@ enum {
     ARG_NO_CPU_LIMIT,
     ARG_DISABLE_SHM,
     ARG_DUMP_RESAMPLE_METHODS,
-    ARG_SYSTEM
+    ARG_SYSTEM,
+    ARG_CLEANUP_SHM
 };
 
 /* Tabel for getopt_long() */
@@ -94,6 +95,7 @@ static struct option long_options[] = {
     {"no-cpu-limit",                2, 0, ARG_NO_CPU_LIMIT},
     {"disable-shm",                 2, 0, ARG_DISABLE_SHM},
     {"dump-resample-methods",       2, 0, ARG_DUMP_RESAMPLE_METHODS},
+    {"cleanup-shm",                 2, 0, ARG_CLEANUP_SHM},
     {NULL, 0, 0, 0}
 };
 
@@ -114,6 +116,7 @@ void pa_cmdline_help(const char *argv0) {
            "      --dump-conf                       Dump default configuration\n"
            "      --dump-modules                    Dump list of available modules\n"
            "      --dump-resample-methods           Dump available resample methods\n"
+           "      --cleanup-shm                     Cleanup stale shared memory segments\n"
            "  -k  --kill                            Kill a running daemon\n"
            "      --check                           Check for a running daemon\n\n"
 
@@ -188,6 +191,10 @@ int pa_cmdline_parse(pa_daemon_conf *conf, int argc, char *const argv [], int *d
             case ARG_DUMP_RESAMPLE_METHODS:
                 conf->cmd = PA_CMD_DUMP_RESAMPLE_METHODS;
                 break;
+
+            case ARG_CLEANUP_SHM:
+                conf->cmd = PA_CMD_CLEANUP_SHM;
+                break;
                 
             case 'k':
             case ARG_KILL:

src/daemon/daemon-conf.h

@@ -41,7 +41,8 @@ typedef enum pa_daemon_conf_cmd {
     PA_CMD_DUMP_MODULES,
     PA_CMD_KILL,
     PA_CMD_CHECK,
-    PA_CMD_DUMP_RESAMPLE_METHODS
+    PA_CMD_DUMP_RESAMPLE_METHODS,
+    PA_CMD_CLEANUP_SHM
 } pa_daemon_conf_cmd_t;
 
 #ifdef HAVE_SYS_RESOURCE_H

src/daemon/main.c

@@ -58,13 +58,12 @@
 #include <tcpd.h>
 #endif
 
-#include "../pulsecore/winsock.h"
-
 #include <pulse/mainloop.h>
 #include <pulse/mainloop-signal.h>
 #include <pulse/timeval.h>
 #include <pulse/xmalloc.h>
 
+#include <pulsecore/winsock.h>
 #include <pulsecore/core-error.h>
 #include <pulsecore/core.h>
 #include <pulsecore/memblock.h>
@@ -83,6 +82,7 @@
 #include <pulsecore/mutex.h>
 #include <pulsecore/thread.h>
 #include <pulsecore/once.h>
+#include <pulsecore/shm.h>
 
 #include "cmdline.h"
 #include "cpulimit.h"
@@ -496,6 +496,13 @@ int main(int argc, char *argv[]) {
 
             goto finish;
 
+        case PA_CMD_CLEANUP_SHM:
+
+            if (pa_shm_cleanup() >= 0)
+                retval = 0;
+
+            goto finish;
+            
         default:
             pa_assert(conf->cmd == PA_CMD_DAEMON);
     }