src/xdg-autostart-generator/xdg-autostart-condition.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "main-func.h"
   4 #include "strv.h"
   5
   6 /*
   7  * This binary is intended to be run as an ExecCondition= in units generated
   8  * by the xdg-autostart-generator. It does the appropriate checks against
   9  * XDG_CURRENT_DESKTOP that are too advanced for simple ConditionEnvironment=
  10  * matches.
  11  */
  12
  13 static int run(int argc, char *argv[]) {
  14         _cleanup_strv_free_ char **only_show_in = NULL, **not_show_in = NULL, **desktops = NULL;
  15         const char *xdg_current_desktop;
  16         char **d;
  17
  18         if (argc != 3)
  19                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
  20                                        "Wrong argument count. Expected the OnlyShowIn= and NotShowIn= sets, each colon separated.");
  21
  22         xdg_current_desktop = getenv("XDG_CURRENT_DESKTOP");
  23         if (xdg_current_desktop) {
  24                 desktops = strv_split(xdg_current_desktop, ":");
  25                 if (!desktops)
  26                         return log_oom();
  27         }
  28
  29         only_show_in = strv_split(argv[1], ":");
  30         not_show_in = strv_split(argv[2], ":");
  31         if (!only_show_in || !not_show_in)
  32                 return log_oom();
  33
  34         /* Each desktop in XDG_CURRENT_DESKTOP needs to be matched in order. */
  35         STRV_FOREACH(d, desktops) {
  36                 if (strv_contains(only_show_in, *d))
  37                         return 0;
  38                 if (strv_contains(not_show_in, *d))
  39                         return 1;
  40         }
  41
  42         /* non-zero exit code when only_show_in has a proper value */
  43         return !strv_isempty(only_show_in);
  44 }
  45
  46 DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);