add option to disallow module loading after startup

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@177 fefdeb5f-60dc-0310-8127-8f9354f1896f

doc/todo

@@ -17,7 +17,6 @@
 - add sample directory
 - paman: show scache and sample size
 - add timing parameter to write callback of stream in client API
-- add option for disabling module loading
 
 ** later ***
 - xmlrpc/http

polyp/cmdline.c

@@ -72,6 +72,7 @@ void pa_cmdline_help(const char *argv0) {
            "  -C         Open a command line on the running TTY\n"
            "  -n         Don't load configuration file (%s)\n"
            "  -D         Daemonize after loading the modules\n"
+           "  -d         Disallow module loading after startup\n"
            "  -f         Dont quit when the startup fails\n"
            "  -v         Verbose startup\n"
            "  -h         Show this help\n"
@@ -88,13 +89,19 @@ struct pa_cmdline* pa_cmdline_parse(int argc, char * const argv []) {
     assert(argc && argv);
 
     cmdline = pa_xmalloc(sizeof(struct pa_cmdline));
-    cmdline->daemonize = cmdline->help = cmdline->verbose = cmdline->high_priority = cmdline->stay_root = cmdline->version = 0;
+    cmdline->daemonize =
+        cmdline->help =
+        cmdline->verbose =
+        cmdline->high_priority =
+        cmdline->stay_root =
+        cmdline->version =
+        cmdline->disallow_module_loading = 0;
     cmdline->fail = 1;
 
     buf = pa_strbuf_new();
     assert(buf);
     
-    while ((c = getopt(argc, argv, "L:F:CDhfvrRVn")) != -1) {
+    while ((c = getopt(argc, argv, "L:F:CDhfvrRVnd")) != -1) {
         switch (c) {
             case 'L':
                 pa_strbuf_printf(buf, "load %s\n", optarg);
@@ -129,7 +136,9 @@ struct pa_cmdline* pa_cmdline_parse(int argc, char * const argv []) {
             case 'n':
                 no_default_config_file = 1;
                 break;
-                
+            case 'd':
+                cmdline->disallow_module_loading = 1;
+                break;
             default:
                 goto fail;
         }

polyp/cmdline.h

@@ -24,7 +24,7 @@
 
 
 struct pa_cmdline {
-    int daemonize, help, fail, verbose, high_priority, stay_root, version;
+    int daemonize, help, fail, verbose, high_priority, stay_root, version, disallow_module_loading;
     char *cli_commands;
 };
 

polyp/core.c

@@ -70,6 +70,8 @@ struct pa_core* pa_core_new(struct pa_mainloop_api *m) {
 
     c->memblock_stat = pa_memblock_stat_new();
 
+    c->disallow_module_loading = 0;
+    
     pa_check_for_sigpipe();
     
     return c;

polyp/core.h

@@ -46,6 +46,8 @@ struct pa_core {
     struct pa_subscription *subscriptions;
 
     struct pa_memblock_stat *memblock_stat;
+
+    int disallow_module_loading;
 };
 
 struct pa_core* pa_core_new(struct pa_mainloop_api *m);

polyp/cpulimit.c

@@ -31,7 +31,7 @@
 #include "cpulimit.h"
 #include "util.h"
 
-/* Utilize this much CPU time at most */
+/* Utilize this much CPU time at maximum */
 #define CPUTIME_PERCENT 70
 
 #define CPUTIME_INTERVAL_SOFT (5)
@@ -77,12 +77,17 @@ static void signal_handler(int sig) {
 
     if (phase == PHASE_IDLE) {
         time_t now;
+
+#ifdef PRINT_CPU_LOAD
         char t[256];
+#endif
 
         time(&now);
 
+#ifdef PRINT_CPU_LOAD
         snprintf(t, sizeof(t), "Using %0.1f%% CPU\n", (double)CPUTIME_INTERVAL_SOFT/(now-last_time)*100);
         write_err(t);
+#endif
         
         if (CPUTIME_INTERVAL_SOFT >= ((now-last_time)*(double)CPUTIME_PERCENT/100)) {
             static const char c = 'X';
@@ -115,7 +120,6 @@ static void callback(struct pa_mainloop_api*m, struct pa_io_event*e, int fd, enu
 }
 
 int pa_cpu_limit_init(struct pa_mainloop_api *m) {
-    int r;
     struct sigaction sa;
     assert(m && !api && !io_event && the_pipe[0] == -1 && the_pipe[1] == -1);
     
@@ -141,8 +145,10 @@ int pa_cpu_limit_init(struct pa_mainloop_api *m) {
     sigemptyset(&sa.sa_mask);
     sa.sa_flags = SA_RESTART;
     
-    r = sigaction(SIGXCPU, &sa, &sigaction_prev);
+    if (sigaction(SIGXCPU, &sa, &sigaction_prev) < 0) {
-    assert(r >= 0);
+        pa_cpu_limit_done();
+        return -1;
+    }
 
     installed = 1;
 

polyp/main.c

@@ -211,6 +211,9 @@ int main(int argc, char *argv[]) {
         retval = 0;
         if (cmdline->daemonize)
             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
+
+        c->disallow_module_loading = cmdline->disallow_module_loading;
+        
         fprintf(stderr, __FILE__": mainloop entry.\n");
         if (pa_mainloop_run(mainloop, &retval) < 0)
             retval = 1;

polyp/module.c

@@ -54,6 +54,9 @@ struct pa_module* pa_module_load(struct pa_core *c, const char *name, const char
     
     assert(c && name);
 
+    if (c->disallow_module_loading)
+        goto fail;
+
     m = pa_xmalloc(sizeof(struct pa_module));
 
     m->name = pa_xstrdup(name);