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 <stdio.h>
  23 #include <getopt.h>
  24 #include <errno.h>
  25 #include <unistd.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include "sd-path.h"
  30 #include "build.h"
  31 #include "macro.h"
  32 #include "util.h"
  33 #include "log.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 -ENOTSUP;
 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                         puts(PACKAGE_STRING);
 161                         puts(SYSTEMD_FEATURES);
 162                         return 0;
 163
 164                 case ARG_SUFFIX:
 165                         arg_suffix = optarg;
 166                         break;
 167
 168                 case '?':
 169                         return -EINVAL;
 170
 171                 default:
 172                         assert_not_reached("Unhandled option");
 173                 }
 174
 175         return 1;
 176 }
 177
 178 int main(int argc, char* argv[]) {
 179         int r;
 180
 181         log_parse_environment();
 182         log_open();
 183
 184         r = parse_argv(argc, argv);
 185         if (r <= 0)
 186                 goto finish;
 187
 188         if (argc > optind) {
 189                 int i, q;
 190
 191                 for (i = optind; i < argc; i++) {
 192                         q = print_home(argv[i]);
 193                         if (q < 0)
 194                                 r = q;
 195                 }
 196         } else
 197                 r = list_homes();
 198
 199
 200 finish:
 201         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 202 }