server: Move afs_pid out of mmd struct.

The afs_pid variable is read-only after it has been initialized. Hence
it does not qualify for being part of the shared memory area which
contains the mmd struct. Make it a global variable instead.

diff --git a/command.c b/command.c
index 9d5723173e043e3d2d882c3c0948da1064011144..43f462fdc202bdaf03fbb869946143697c370863 100644 (file)
--- a/command.c
+++ b/command.c
@@ -394,7 +394,7 @@ static int com_si(struct command_context *cc,
                "supported audio formats: %s\n",
                ut, mmd->num_played,
                (int)getppid(),
-               (int)mmd->afs_pid,
+               (int)afs_pid,
                mmd->active_connections,
                mmd->num_commands,
                mmd->num_connects,

diff --git a/server.c b/server.c
index c9605d2f7b94e0a7b64372469ce1713154a749d0..2018b8eece1988206e2992f560b65fa73059ff5e 100644 (file)
--- a/server.c
+++ b/server.c
@@ -95,6 +95,9 @@ int mmd_mutex;
 static struct sched sched;
 static struct signal_task *signal_task;
 
+/** The process id of the audio file selector process. */
+pid_t afs_pid = 0;
+
 /** The task responsible for server command handling. */
 struct server_command_task {
        /** TCP port on which para_server listens for connections. */
@@ -179,7 +182,7 @@ void parse_config_or_die(bool reload)
                cf = para_strdup(OPT_STRING_VAL(CONFIG_FILE));
        else
                cf = make_message("%s/.paraslash/server.conf", home);
-       if (!mmd || getpid() != mmd->afs_pid) {
+       if (!mmd || getpid() != afs_pid) {
                if (OPT_GIVEN(USER_LIST))
                        user_list_file = para_strdup(OPT_STRING_VAL(USER_LIST));
                else
@@ -258,8 +261,8 @@ static void handle_sighup(void)
 
        PARA_NOTICE_LOG("SIGHUP\n");
        parse_config_or_die(true);
-       if (mmd->afs_pid)
-               kill(mmd->afs_pid, SIGHUP);
+       if (afs_pid != 0)
+               kill(afs_pid, SIGHUP);
 }
 
 static int signal_post_select(struct sched *s, __a_unused void *context)
@@ -278,7 +281,7 @@ static int signal_post_select(struct sched *s, __a_unused void *context)
                        int ret = para_reap_child(&pid);
                        if (ret <= 0)
                                break;
-                       if (pid != mmd->afs_pid)
+                       if (pid != afs_pid)
                                continue;
                        PARA_EMERG_LOG("fatal: afs died\n");
                        kill(0, SIGTERM);
@@ -304,8 +307,8 @@ static int signal_post_select(struct sched *s, __a_unused void *context)
                 * processes get killed immediately by the above kill().
                 */
                PARA_INFO_LOG("waiting for afs (pid %d) to die\n",
-                       (int)mmd->afs_pid);
-               waitpid(mmd->afs_pid, NULL, 0);
+                       (int)afs_pid);
+               waitpid(afs_pid, NULL, 0);
 cleanup:
                free(mmd->afd.afhi.chunk_table);
                close_listed_fds();
@@ -432,7 +435,6 @@ err:
 static int init_afs(int argc, char **argv)
 {
        int ret, afs_server_socket[2];
-       pid_t afs_pid;
        char c;
 
        ret = socketpair(PF_UNIX, SOCK_STREAM, 0, afs_server_socket);
@@ -446,6 +448,7 @@ static int init_afs(int argc, char **argv)
        if (afs_pid == 0) { /* child (afs) */
                int i;
 
+               afs_pid = getpid();
                for (i = argc - 1; i >= 0; i--)
                        memset(argv[i], 0, strlen(argv[i]));
                i = argc - lls_num_inputs(cmdline_lpr) - 1;
@@ -453,7 +456,6 @@ static int init_afs(int argc, char **argv)
                close(afs_server_socket[0]);
                afs_init(afs_socket_cookie, afs_server_socket[1]);
        }
-       mmd->afs_pid = afs_pid;
        close(afs_server_socket[1]);
        if (read(afs_server_socket[0], &c, 1) <= 0) {
                PARA_EMERG_LOG("early afs exit\n");

diff --git a/server.h b/server.h
index 23feadd1eee4016da4cdb124dff807137d166df2..1852dd50962b78a72d270bb1d20e61eb0d9911c4 100644 (file)
--- a/server.h
+++ b/server.h
@@ -73,8 +73,6 @@ struct misc_meta_data {
        unsigned int num_connects;
        /** The number of connections currently active. */
        unsigned int active_connections;
-       /** The process id of the audio file selector. */
-       pid_t afs_pid;
        /** This gets updated by afs and contains its current mode. */
        char afs_mode_string[MAXLINE];
        /** Used by the sender command. */
@@ -83,6 +81,7 @@ struct misc_meta_data {
        struct audio_file_data afd;
 };
 
+extern pid_t afs_pid;
 extern struct lls_parse_result *server_lpr;
 
 /**