src/shared/service-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <getopt.h>
   4 #include <stdio.h>
   5
   6 #include "alloc-util.h"
   7 #include "build.h"
   8 #include "pretty-print.h"
   9 #include "service-util.h"
  10 #include "terminal-util.h"
  11
  12 static int help(const char *program_path, const char *service, const char *description, bool bus_introspect) {
  13         _cleanup_free_ char *link = NULL;
  14         int r;
  15
  16         r = terminal_urlify_man(service, "8", &link);
  17         if (r < 0)
  18                 return log_oom();
  19
  20         printf("%1$s [OPTIONS...]\n"
  21                "\n%5$s%7$s%6$s\n"
  22                "\nThis program takes no positional arguments.\n"
  23                "\n%3$sOptions:%4$s\n"
  24                "  -h --help                 Show this help\n"
  25                "     --version              Show package version\n"
  26                "%8$s"
  27                "\nSee the %2$s for details.\n",
  28                program_path,
  29                link,
  30                ansi_underline(),
  31                ansi_normal(),
  32                ansi_highlight(),
  33                ansi_normal(),
  34                description,
  35                bus_introspect ? "     --bus-introspect=PATH  Write D-Bus XML introspection data\n" : "");
  36
  37         return 0; /* No further action */
  38 }
  39
  40 int service_parse_argv(
  41                 const char *service,
  42                 const char *description,
  43                 const BusObjectImplementation* const* bus_objects,
  44                 int argc, char *argv[]) {
  45
  46         enum {
  47                 ARG_VERSION = 0x100,
  48                 ARG_BUS_INTROSPECT,
  49         };
  50
  51         static const struct option options[] = {
  52                 { "help",           no_argument,       NULL, 'h'                },
  53                 { "version",        no_argument,       NULL, ARG_VERSION        },
  54                 { "bus-introspect", required_argument, NULL, ARG_BUS_INTROSPECT },
  55                 {}
  56         };
  57
  58         int c;
  59
  60         assert(argc >= 0);
  61         assert(argv);
  62
  63         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
  64                 switch (c) {
  65
  66                 case 'h':
  67                         return help(argv[0], service, description, bus_objects);
  68
  69                 case ARG_VERSION:
  70                         return version();
  71
  72                 case ARG_BUS_INTROSPECT:
  73                         return bus_introspect_implementations(
  74                                         stdout,
  75                                         optarg,
  76                                         bus_objects);
  77
  78                 case '?':
  79                         return -EINVAL;
  80
  81                 default:
  82                         assert_not_reached();
  83                 }
  84
  85         if (optind < argc)
  86                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
  87                                        "This program takes no arguments.");
  88
  89         return 1; /* Further action */
  90 }