Accept full path for DefaultWindowManager

docs/man/Makefile.am

@@ -17,7 +17,8 @@ SUBST_VARS = sed \
    -e 's|@bindir[@]|$(bindir)|g' \
    -e 's|@localstatedir[@]|$(localstatedir)|g' \
    -e 's|@sysconfdir[@]|$(sysconfdir)|g' \
-   -e 's|@socketdir[@]|$(socketdir)|g'
+   -e 's|@socketdir[@]|$(socketdir)|g' \
+   -e 's|@xrdpconfdir[@]|$(sysconfdir)/xrdp|g'
 
 subst_verbose = $(subst_verbose_@AM_V@)
 subst_verbose_ = $(subst_verbose_@AM_DEFAULT_V@)

docs/man/sesman.ini.5.in

@@ -62,14 +62,23 @@ specified by \fBUserWindowManager\fR if it exists.
 
 .TP
 \fBUserWindowManager\fR=\fIfilename\fR
-Name of the startup script relative to the user's home directory. If
+Path of the startup script relative to the user's home directory. If
 present and enabled by \fBEnableUserWindowManager\fR, that script is
 executed instead of \fBDefaultWindowManager\fR.
 
 .TP
 \fBDefaultWindowManager\fR=\fIfilename\fR
-Full path to the default startup script used by xrdp-sesman to start a
-session if the user script is disabled or missing.
+Full path or relative path of the default startup script used by xrdp-sesman
+to start a session.  If the path is not a full path, it will be resolved as
+relative path to \fI@xrdpconfdir@\fR. If not specified, defaults to
+\fI@xrdpconfdir@/startwm.sh\fR.
+
+.TP
+\fBReconnectScript\fR=\fIfilename\fR
+Full path or relative path if the script which executed when users reconnects
+to the existing session. If the path is not a full path, it will be resolved as
+relative path to \fI@xrdpconfdir@\fR. If not specified, defaults to
+\fI@xrdpconfdir@/reconnectwm.sh\fR.
 
 .SH "LOGGING"
 Following parameters can be used in the \fB[Logging]\fR section.

sesman/config.c

@@ -105,6 +105,7 @@ config_read_globals(int file, struct config_sesman *cf, struct list *param_n,
                     struct list *param_v)
 {
     int i;
+    int length;
     char *buf;
 
     list_clear(param_v);
@@ -115,8 +116,9 @@ config_read_globals(int file, struct config_sesman *cf, struct list *param_n,
     cf->listen_port[0] = '\0';
     cf->enable_user_wm = 0;
     cf->user_wm[0] = '\0';
-    cf->default_wm[0] = '\0';
+    cf->default_wm = 0;
     cf->auth_file_path = 0;
+    cf->reconnect_sh = 0;
 
     file_read_section(file, SESMAN_CFG_GLOBALS, param_n, param_v);
 
@@ -126,7 +128,7 @@ config_read_globals(int file, struct config_sesman *cf, struct list *param_n,
 
         if (0 == g_strcasecmp(buf, SESMAN_CFG_DEFWM))
         {
-            g_strncpy(cf->default_wm, (char *)list_get_item(param_v, i), 31);
+            cf->default_wm = g_strdup((char *)list_get_item(param_v, i));
         }
         else if (0 == g_strcasecmp(buf, SESMAN_CFG_USERWM))
         {
@@ -148,6 +150,10 @@ config_read_globals(int file, struct config_sesman *cf, struct list *param_n,
         {
             cf->auth_file_path = g_strdup((char *)list_get_item(param_v, i));
         }
+        else if (g_strcasecmp(buf, SESMAN_CFG_RECONNECT_SH) == 0)
+        {
+            cf->reconnect_sh = g_strdup((char *)list_get_item(param_v, i));
+        }
     }
 
     /* checking for missing required parameters */
@@ -166,9 +172,46 @@ config_read_globals(int file, struct config_sesman *cf, struct list *param_n,
         cf->enable_user_wm = 0;
     }
 
-    if ('\0' == cf->default_wm[0])
+    if (cf->default_wm == 0)
+    {
+        cf->default_wm = g_strdup("startwm.sh");
+    }
+    else if (g_strlen(cf->default_wm) == 0)
+    {
+        g_free(cf->default_wm);
+        cf->default_wm = g_strdup("startwm.sh");
+    }
+    /* if default_wm doesn't begin with '/', it's a relative path to XRDP_CFG_PATH */
+    if (cf->default_wm[0] != '/')
+    {
+        /* sizeof operator returns string length including null terminator  */
+        length = sizeof(XRDP_CFG_PATH) + g_strlen(g_cfg->default_wm) + 1; /* '/' */
+        buf = (char *)g_malloc(length, 0);
+        g_sprintf(buf, "%s/%s", XRDP_CFG_PATH, g_cfg->default_wm);
+        g_free(g_cfg->default_wm);
+        g_cfg->default_wm = g_strdup(buf);
+        g_free(buf);
+    }
+
+    if (cf->reconnect_sh == 0)
+    {
+        cf->reconnect_sh = g_strdup("reconnectwm.sh");
+    }
+    else if (g_strlen(cf->reconnect_sh) == 0)
+    {
+        g_free(cf->reconnect_sh);
+        cf->reconnect_sh = g_strdup("reconnectwm.sh");
+    }
+    /* if reconnect_sh doesn't begin with '/', it's a relative path to XRDP_CFG_PATH */
+    if (cf->reconnect_sh[0] != '/')
     {
-        g_strncpy(cf->default_wm, "startwm.sh", 11);
+        /* sizeof operator returns string length including null terminator  */
+        length = sizeof(XRDP_CFG_PATH) + g_strlen(g_cfg->reconnect_sh) + 1; /* '/' */
+        buf = (char *)g_malloc(length, 0);
+        g_sprintf(buf, "%s/%s", XRDP_CFG_PATH, g_cfg->reconnect_sh);
+        g_free(g_cfg->reconnect_sh);
+        g_cfg->reconnect_sh = g_strdup(buf);
+        g_free(buf);
     }
 
     return 0;
@@ -436,6 +479,7 @@ config_dump(struct config_sesman *config)
     g_writeln("    EnableUserWindowManager:  %d", config->enable_user_wm);
     g_writeln("    UserWindowManager:        %s", config->user_wm);
     g_writeln("    DefaultWindowManager:     %s", config->default_wm);
+    g_writeln("    ReconnectScript:          %s", config->reconnect_sh);
     g_writeln("    AuthFilePath:             %s",
              ((config->auth_file_path) ? (config->auth_file_path) : ("disabled")));
 
@@ -530,6 +574,8 @@ config_dump(struct config_sesman *config)
 void
 config_free(struct config_sesman *cs)
 {
+    g_free(cs->default_wm);
+    g_free(cs->reconnect_sh);
     g_free(cs->auth_file_path);
     list_delete(cs->rdp_params);
     list_delete(cs->vnc_params);

sesman/config.h

@@ -39,6 +39,7 @@
 #define SESMAN_CFG_USERWM            "UserWindowManager"
 #define SESMAN_CFG_MAX_SESSION       "MaxSessions"
 #define SESMAN_CFG_AUTH_FILE_PATH    "AuthFilePath"
+#define SESMAN_CFG_RECONNECT_SH      "ReconnectScript"
 
 #define SESMAN_CFG_RDP_PARAMS        "X11rdp"
 #define SESMAN_CFG_XORG_PARAMS       "Xorg"
@@ -198,12 +199,17 @@ struct config_sesman
    * @var default_wm
    * @brief Default window manager
    */
-  char default_wm[32];
+  char *default_wm;
   /**
    * @var user_wm
    * @brief Default window manager
    */
   char user_wm[32];
+  /**
+   * @var reconnect_sh
+   * @brief Script executed when reconnected
+   */
+  char *reconnect_sh;
   /**
    * @var auth_file_path
    * @brief Auth file path

sesman/sesman.ini.in

@@ -1,9 +1,15 @@
+;; See `man 5 sesman.ini` for details
+
 [Globals]
 ListenAddress=127.0.0.1
 ListenPort=3350
 EnableUserWindowManager=true
+; Give in relative path to user's home directory
 UserWindowManager=startwm.sh
+; Give in full path or relative path to @sesmansysconfdir@
 DefaultWindowManager=startwm.sh
+; Give in full path or relative path to @sesmansysconfdir@
+ReconnectScript=reconnectwm.sh
 
 [Security]
 AllowRootLogin=true

sesman/session.c

@@ -575,8 +575,7 @@ session_start_fork(tbus data, tui8 type, struct SCP_CONNECTION *c,
                 }
                 /* if we're here something happened to g_execlp3
                    so we try running the default window manager */
-                g_sprintf(text, "%s/%s", XRDP_CFG_PATH, g_cfg->default_wm);
-                g_execlp3(text, g_cfg->default_wm, 0);
+                g_execlp3(g_cfg->default_wm, g_cfg->default_wm, 0);
 
                 log_message(LOG_LEVEL_ALWAYS, "error starting default "
                              "wm for user %s - pid %d", s->username, g_getpid());
@@ -585,7 +584,7 @@ session_start_fork(tbus data, tui8 type, struct SCP_CONNECTION *c,
                             "%s", g_get_errno(), g_get_strerror());
                 log_message(LOG_LEVEL_DEBUG, "execlp3 parameter list:");
                 log_message(LOG_LEVEL_DEBUG, "        argv[0] = %s",
-                            text);
+                            g_cfg->default_wm);
                 log_message(LOG_LEVEL_DEBUG, "        argv[1] = %s",
                             g_cfg->default_wm);
 
@@ -863,7 +862,6 @@ static int
 session_reconnect_fork(int display, char *username, long data)
 {
     int pid;
-    char text[256];
 
     pid = g_fork();
 
@@ -878,11 +876,10 @@ session_reconnect_fork(int display, char *username, long data)
                      g_cfg->env_names,
                      g_cfg->env_values);
         auth_set_env(data);
-        g_snprintf(text, 255, "%s/%s", XRDP_CFG_PATH, "reconnectwm.sh");
 
-        if (g_file_exist(text))
+        if (g_file_exist(g_cfg->reconnect_sh))
         {
-            g_execlp3(text, g_cfg->default_wm, 0);
+            g_execlp3(g_cfg->reconnect_sh, g_cfg->reconnect_sh, 0);
         }
 
         g_exit(0);