Change mount namespace

When executing the debug tool process, the child process has to change
the mount namespace to the mount namespace of the target process if the
option is 'attach'.

Change-Id: I9db343a70f614d18d291018ecab04a4db2b8fec0
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>

diff --git a/src/launchpad-process-pool/inc/launchpad_debug.h b/src/launchpad-process-pool/inc/launchpad_debug.h
index a866270f1d982507b261c679ddeb2acfc3e63fe4..169790054c6ea81e7afb37269c2ac3d59e6f978b 100644 (file)
--- a/src/launchpad-process-pool/inc/launchpad_debug.h
+++ b/src/launchpad-process-pool/inc/launchpad_debug.h
@@ -20,6 +20,7 @@
 #include <stdbool.h>
 #include <bundle.h>
 
+int _debug_change_mount_namespace(void);
 int _debug_create_extra_argv(int *arg, char ***argv);
 int _debug_create_argv(int *argc, char ***argv, bool *attach);
 void _debug_destroy_argv(int argc, char **argv);

diff --git a/src/launchpad-process-pool/src/launchpad.c b/src/launchpad-process-pool/src/launchpad.c
index c2690061e2432d5fb544b84f7f97d8f4db662ecb..b4907f01902de7e5fd1b5417c65b16e79a08e902 100644 (file)
--- a/src/launchpad-process-pool/src/launchpad.c
+++ b/src/launchpad-process-pool/src/launchpad.c
@@ -1263,6 +1263,9 @@ static int __prepare_exec(const char *appid, const char *app_path,
        if (ret < 0)
                return PAD_ERR_FAILED;
 
+       if (bundle_get_type(kb, AUL_K_SDK) != BUNDLE_TYPE_NONE)
+               _debug_change_mount_namespace();
+
        /* SET PRIVILEGES*/
        _W("security_manager_prepare_app ++");
        ret = security_manager_prepare_app(appid);

diff --git a/src/launchpad-process-pool/src/launchpad_debug.c b/src/launchpad-process-pool/src/launchpad_debug.c
index 37934e0297c3327a2fd16296b8ae9ad6a2534bb1..8040f452ce2be3c2e246d555f3d6aa7cd83c7d72 100644 (file)
--- a/src/launchpad-process-pool/src/launchpad_debug.c
+++ b/src/launchpad-process-pool/src/launchpad_debug.c
@@ -23,6 +23,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <bundle_internal.h>
+#include <ctype.h>
 
 #include "debugger_info.h"
 #include "key.h"
@@ -38,6 +39,32 @@ static debugger_info_h __debugger_info;
 static GList *__debug_argv_list;
 static GList *__extra_argv_list;
 
+int _debug_change_mount_namespace(void)
+{
+       const char *pid_str;
+       char buf[PATH_MAX];
+       int ret;
+       int fd;
+
+       pid_str = getenv("TARGET_PID");
+       if (pid_str == NULL)
+               return 0;
+
+       snprintf(buf, sizeof(buf), "/proc/%s/ns/mnt", pid_str);
+       fd = open(buf, O_RDONLY);
+       if (fd < 0) {
+               _E("open() is failed. path(%s), errno(%d)", buf, errno);
+               return -1;
+       }
+
+       ret = setns(fd, CLONE_NEWNS);
+       close(fd);
+       if (ret != 0)
+               _E("setns() is failed. errno(%d)", errno);
+
+       return ret;
+}
+
 int _debug_create_extra_argv(int *argc, char ***argv)
 {
        int new_argc;
@@ -296,6 +323,12 @@ static void __add_debug_argv(gpointer data, gpointer user_data)
 
                __debug_argv_list = g_list_append(__debug_argv_list,
                                strdup(str_arr[i]));
+               if (!strcmp(key, "__DLP_ATTACH_ARG__")) {
+                       if (isdigit(str_arr[i][0])) {
+                               _D("Target PID: %s", str_arr[i]);
+                               setenv("TARGET_PID", str_arr[i], 1);
+                       }
+               }
        }
 
        if (str_arr)