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 "log.h"
  30 #include "macro.h"
  31 #include "util.h"
  32
  33 static const char *arg_suffix = NULL;
  34
  35 static const char* const path_table[_SD_PATH_MAX] = {
  36         [SD_PATH_TEMPORARY] = "temporary",
  37         [SD_PATH_TEMPORARY_LARGE] = "temporary-large",
  38         [SD_PATH_SYSTEM_BINARIES] = "system-binaries",
  39         [SD_PATH_SYSTEM_INCLUDE] = "system-include",
  40         [SD_PATH_SYSTEM_LIBRARY_PRIVATE] = "system-library-private",
  41         [SD_PATH_SYSTEM_LIBRARY_ARCH] = "system-library-arch",
  42         [SD_PATH_SYSTEM_SHARED] = "system-shared",
  43         [SD_PATH_SYSTEM_CONFIGURATION_FACTORY] = "system-configuration-factory",
  44         [SD_PATH_SYSTEM_STATE_FACTORY] = "system-state-factory",
  45         [SD_PATH_SYSTEM_CONFIGURATION] = "system-configuration",
  46         [SD_PATH_SYSTEM_RUNTIME] = "system-runtime",
  47         [SD_PATH_SYSTEM_RUNTIME_LOGS] = "system-runtime-logs",
  48         [SD_PATH_SYSTEM_STATE_PRIVATE] = "system-state-private",
  49         [SD_PATH_SYSTEM_STATE_LOGS] = "system-state-logs",
  50         [SD_PATH_SYSTEM_STATE_CACHE] = "system-state-cache",
  51         [SD_PATH_SYSTEM_STATE_SPOOL] = "system-state-spool",
  52         [SD_PATH_USER_BINARIES] = "user-binaries",
  53         [SD_PATH_USER_LIBRARY_PRIVATE] = "user-library-private",
  54         [SD_PATH_USER_LIBRARY_ARCH] = "user-library-arch",
  55         [SD_PATH_USER_SHARED] = "user-shared",
  56         [SD_PATH_USER_CONFIGURATION] = "user-configuration",
  57         [SD_PATH_USER_RUNTIME] = "user-runtime",
  58         [SD_PATH_USER_STATE_CACHE] = "user-state-cache",
  59         [SD_PATH_USER] = "user",
  60         [SD_PATH_USER_DOCUMENTS] = "user-documents",
  61         [SD_PATH_USER_MUSIC] = "user-music",
  62         [SD_PATH_USER_PICTURES] = "user-pictures",
  63         [SD_PATH_USER_VIDEOS] = "user-videos",
  64         [SD_PATH_USER_DOWNLOAD] = "user-download",
  65         [SD_PATH_USER_PUBLIC] = "user-public",
  66         [SD_PATH_USER_TEMPLATES] = "user-templates",
  67         [SD_PATH_USER_DESKTOP] = "user-desktop",
  68         [SD_PATH_SEARCH_BINARIES] = "search-binaries",
  69         [SD_PATH_SEARCH_LIBRARY_PRIVATE] = "search-library-private",
  70         [SD_PATH_SEARCH_LIBRARY_ARCH] = "search-library-arch",
  71         [SD_PATH_SEARCH_SHARED] = "search-shared",
  72         [SD_PATH_SEARCH_CONFIGURATION_FACTORY] = "search-configuration-factory",
  73         [SD_PATH_SEARCH_STATE_FACTORY] = "search-state-factory",
  74         [SD_PATH_SEARCH_CONFIGURATION] = "search-configuration",
  75 };
  76
  77 static int list_homes(void) {
  78         uint64_t i = 0;
  79         int r = 0;
  80
  81         for (i = 0; i < ELEMENTSOF(path_table); i++) {
  82                 _cleanup_free_ char *p = NULL;
  83                 int q;
  84
  85                 q = sd_path_home(i, arg_suffix, &p);
  86                 if (q == -ENXIO)
  87                         continue;
  88                 if (q < 0) {
  89                         log_error_errno(r, "Failed to query %s: %m", path_table[i]);
  90                         r = q;
  91                         continue;
  92                 }
  93
  94                 printf("%s: %s\n", path_table[i], p);
  95         }
  96
  97         return r;
  98 }
  99
 100 static int print_home(const char *n) {
 101         uint64_t i = 0;
 102         int r;
 103
 104         for (i = 0; i < ELEMENTSOF(path_table); i++) {
 105                 if (streq(path_table[i], n)) {
 106                         _cleanup_free_ char *p = NULL;
 107
 108                         r = sd_path_home(i, arg_suffix, &p);
 109                         if (r < 0)
 110                                 return log_error_errno(r, "Failed to query %s: %m", n);
 111
 112                         printf("%s\n", p);
 113                         return 0;
 114                 }
 115         }
 116
 117         log_error("Path %s not known.", n);
 118         return -EOPNOTSUPP;
 119 }
 120
 121 static void help(void) {
 122         printf("%s [OPTIONS...] [NAME...]\n\n"
 123                "Show system and user paths.\n\n"
 124                "  -h --help             Show this help\n"
 125                "     --version          Show package version\n"
 126                "     --suffix=SUFFIX    Suffix to append to paths\n",
 127                program_invocation_short_name);
 128 }
 129
 130 static int parse_argv(int argc, char *argv[]) {
 131
 132         enum {
 133                 ARG_VERSION = 0x100,
 134                 ARG_SUFFIX,
 135         };
 136
 137         static const struct option options[] = {
 138                 { "help",      no_argument,       NULL, 'h'           },
 139                 { "version",   no_argument,       NULL, ARG_VERSION   },
 140                 { "suffix",    required_argument, NULL, ARG_SUFFIX    },
 141                 {}
 142         };
 143
 144         int c;
 145
 146         assert(argc >= 0);
 147         assert(argv);
 148
 149         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
 150
 151                 switch (c) {
 152
 153                 case 'h':
 154                         help();
 155                         return 0;
 156
 157                 case ARG_VERSION:
 158                         return version();
 159
 160                 case ARG_SUFFIX:
 161                         arg_suffix = optarg;
 162                         break;
 163
 164                 case '?':
 165                         return -EINVAL;
 166
 167                 default:
 168                         assert_not_reached("Unhandled option");
 169                 }
 170
 171         return 1;
 172 }
 173
 174 int main(int argc, char* argv[]) {
 175         int r;
 176
 177         log_parse_environment();
 178         log_open();
 179
 180         r = parse_argv(argc, argv);
 181         if (r <= 0)
 182                 goto finish;
 183
 184         if (argc > optind) {
 185                 int i, q;
 186
 187                 for (i = optind; i < argc; i++) {
 188                         q = print_home(argv[i]);
 189                         if (q < 0)
 190                                 r = q;
 191                 }
 192         } else
 193                 r = list_homes();
 194
 195
 196 finish:
 197         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 198 }