src/path/path.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <getopt.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26
  27 #include "sd-path.h"
  28
  29 #include "alloc-util.h"
  30 #include "log.h"
  31 #include "macro.h"
  32 #include "string-util.h"
  33 #include "util.h"
  34
  35 static const char *arg_suffix = NULL;
  36
  37 static const char* const path_table[_SD_PATH_MAX] = {
  38         [SD_PATH_TEMPORARY] = "temporary",
  39         [SD_PATH_TEMPORARY_LARGE] = "temporary-large",
  40         [SD_PATH_SYSTEM_BINARIES] = "system-binaries",
  41         [SD_PATH_SYSTEM_INCLUDE] = "system-include",
  42         [SD_PATH_SYSTEM_LIBRARY_PRIVATE] = "system-library-private",
  43         [SD_PATH_SYSTEM_LIBRARY_ARCH] = "system-library-arch",
  44         [SD_PATH_SYSTEM_SHARED] = "system-shared",
  45         [SD_PATH_SYSTEM_CONFIGURATION_FACTORY] = "system-configuration-factory",
  46         [SD_PATH_SYSTEM_STATE_FACTORY] = "system-state-factory",
  47         [SD_PATH_SYSTEM_CONFIGURATION] = "system-configuration",
  48         [SD_PATH_SYSTEM_RUNTIME] = "system-runtime",
  49         [SD_PATH_SYSTEM_RUNTIME_LOGS] = "system-runtime-logs",
  50         [SD_PATH_SYSTEM_STATE_PRIVATE] = "system-state-private",
  51         [SD_PATH_SYSTEM_STATE_LOGS] = "system-state-logs",
  52         [SD_PATH_SYSTEM_STATE_CACHE] = "system-state-cache",
  53         [SD_PATH_SYSTEM_STATE_SPOOL] = "system-state-spool",
  54         [SD_PATH_USER_BINARIES] = "user-binaries",
  55         [SD_PATH_USER_LIBRARY_PRIVATE] = "user-library-private",
  56         [SD_PATH_USER_LIBRARY_ARCH] = "user-library-arch",
  57         [SD_PATH_USER_SHARED] = "user-shared",
  58         [SD_PATH_USER_CONFIGURATION] = "user-configuration",
  59         [SD_PATH_USER_RUNTIME] = "user-runtime",
  60         [SD_PATH_USER_STATE_CACHE] = "user-state-cache",
  61         [SD_PATH_USER] = "user",
  62         [SD_PATH_USER_DOCUMENTS] = "user-documents",
  63         [SD_PATH_USER_MUSIC] = "user-music",
  64         [SD_PATH_USER_PICTURES] = "user-pictures",
  65         [SD_PATH_USER_VIDEOS] = "user-videos",
  66         [SD_PATH_USER_DOWNLOAD] = "user-download",
  67         [SD_PATH_USER_PUBLIC] = "user-public",
  68         [SD_PATH_USER_TEMPLATES] = "user-templates",
  69         [SD_PATH_USER_DESKTOP] = "user-desktop",
  70         [SD_PATH_SEARCH_BINARIES] = "search-binaries",
  71         [SD_PATH_SEARCH_LIBRARY_PRIVATE] = "search-library-private",
  72         [SD_PATH_SEARCH_LIBRARY_ARCH] = "search-library-arch",
  73         [SD_PATH_SEARCH_SHARED] = "search-shared",
  74         [SD_PATH_SEARCH_CONFIGURATION_FACTORY] = "search-configuration-factory",
  75         [SD_PATH_SEARCH_STATE_FACTORY] = "search-state-factory",
  76         [SD_PATH_SEARCH_CONFIGURATION] = "search-configuration",
  77 };
  78
  79 static int list_homes(void) {
  80         uint64_t i = 0;
  81         int r = 0;
  82
  83         for (i = 0; i < ELEMENTSOF(path_table); i++) {
  84                 _cleanup_free_ char *p = NULL;
  85                 int q;
  86
  87                 q = sd_path_home(i, arg_suffix, &p);
  88                 if (q == -ENXIO)
  89                         continue;
  90                 if (q < 0) {
  91                         log_error_errno(r, "Failed to query %s: %m", path_table[i]);
  92                         r = q;
  93                         continue;
  94                 }
  95
  96                 printf("%s: %s\n", path_table[i], p);
  97         }
  98
  99         return r;
 100 }
 101
 102 static int print_home(const char *n) {
 103         uint64_t i = 0;
 104         int r;
 105
 106         for (i = 0; i < ELEMENTSOF(path_table); i++) {
 107                 if (streq(path_table[i], n)) {
 108                         _cleanup_free_ char *p = NULL;
 109
 110                         r = sd_path_home(i, arg_suffix, &p);
 111                         if (r < 0)
 112                                 return log_error_errno(r, "Failed to query %s: %m", n);
 113
 114                         printf("%s\n", p);
 115                         return 0;
 116                 }
 117         }
 118
 119         log_error("Path %s not known.", n);
 120         return -EOPNOTSUPP;
 121 }
 122
 123 static void help(void) {
 124         printf("%s [OPTIONS...] [NAME...]\n\n"
 125                "Show system and user paths.\n\n"
 126                "  -h --help             Show this help\n"
 127                "     --version          Show package version\n"
 128                "     --suffix=SUFFIX    Suffix to append to paths\n",
 129                program_invocation_short_name);
 130 }
 131
 132 static int parse_argv(int argc, char *argv[]) {
 133
 134         enum {
 135                 ARG_VERSION = 0x100,
 136                 ARG_SUFFIX,
 137         };
 138
 139         static const struct option options[] = {
 140                 { "help",      no_argument,       NULL, 'h'           },
 141                 { "version",   no_argument,       NULL, ARG_VERSION   },
 142                 { "suffix",    required_argument, NULL, ARG_SUFFIX    },
 143                 {}
 144         };
 145
 146         int c;
 147
 148         assert(argc >= 0);
 149         assert(argv);
 150
 151         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
 152
 153                 switch (c) {
 154
 155                 case 'h':
 156                         help();
 157                         return 0;
 158
 159                 case ARG_VERSION:
 160                         return version();
 161
 162                 case ARG_SUFFIX:
 163                         arg_suffix = optarg;
 164                         break;
 165
 166                 case '?':
 167                         return -EINVAL;
 168
 169                 default:
 170                         assert_not_reached("Unhandled option");
 171                 }
 172
 173         return 1;
 174 }
 175
 176 int main(int argc, char* argv[]) {
 177         int r;
 178
 179         log_parse_environment();
 180         log_open();
 181
 182         r = parse_argv(argc, argv);
 183         if (r <= 0)
 184                 goto finish;
 185
 186         if (argc > optind) {
 187                 int i, q;
 188
 189                 for (i = optind; i < argc; i++) {
 190                         q = print_home(argv[i]);
 191                         if (q < 0)
 192                                 r = q;
 193                 }
 194         } else
 195                 r = list_homes();
 196
 197
 198 finish:
 199         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 200 }