keep track of all running child processes in one place

[project/netifd.git] / main.c

diff --git a/main.c b/main.c
index 5770782..352519d 100644 (file)
--- a/main.c
+++ b/main.c
@@ -14,6 +14,61 @@ unsigned int debug_mask = 0;
 const char *main_path = DEFAULT_MAIN_PATH;
 const char *resolv_conf = DEFAULT_RESOLV_CONF;
 static char **global_argv;
+static struct list_head process_list = LIST_HEAD_INIT(process_list);
+
+static void
+netifd_process_cb(struct uloop_process *proc, int ret)
+{
+       struct netifd_process *np;
+       np = container_of(proc, struct netifd_process, uloop);
+       list_del(&np->list);
+       return np->cb(np, ret);
+}
+
+int
+netifd_start_process(const char **argv, char **env, int dir_fd, struct netifd_process *proc)
+{
+       int pid;
+
+       netifd_kill_process(proc);
+
+       if ((pid = fork()) < 0)
+               return -1;
+
+       if (!pid) {
+               if (env) {
+                       while (*env) {
+                               putenv(*env);
+                               env++;
+                       }
+               }
+               if (dir_fd >= 0)
+                       fchdir(dir_fd);
+               execvp(argv[0], (char **) argv);
+               exit(127);
+       }
+
+       if (pid < 0)
+               return -1;
+
+       proc->uloop.cb = netifd_process_cb;
+       proc->uloop.pid = pid;
+       uloop_process_add(&proc->uloop);
+       list_add_tail(&proc->list, &process_list);
+
+       return 0;
+}
+
+void
+netifd_kill_process(struct netifd_process *proc)
+{
+       if (!proc->uloop.pending)
+               return;
+
+       kill(proc->uloop.pid, SIGTERM);
+       uloop_process_delete(&proc->uloop);
+       list_del(&proc->list);
+}
 
 static void netifd_do_restart(struct uloop_timeout *timeout)
 {