src/tools/sysdb/main.c

   1 /*
   2  * SysDB - src/tools/sysdb/main.c
   3  * Copyright (C) 2013 Sebastian 'tokkee' Harl <sh@tokkee.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  17  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  18  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
  19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #if HAVE_CONFIG_H
  29 #       include "config.h"
  30 #endif /* HAVE_CONFIG_H */
  31
  32 #include "tools/sysdb/command.h"
  33 #include "tools/sysdb/input.h"
  34
  35 #include "client/sysdb.h"
  36 #include "client/sock.h"
  37 #include "utils/error.h"
  38 #include "utils/llist.h"
  39 #include "utils/strbuf.h"
  40
  41 #include <errno.h>
  42
  43 #if HAVE_LIBGEN_H
  44 #       include <libgen.h>
  45 #else /* HAVE_LIBGEN_H */
  46 #       define basename(path) (path)
  47 #endif /* ! HAVE_LIBGEN_H */
  48
  49 #include <sys/stat.h>
  50 #include <fcntl.h>
  51
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55
  56 #include <unistd.h>
  57
  58 #include <sys/types.h>
  59
  60 #include <pwd.h>
  61
  62 #if HAVE_EDITLINE_READLINE_H
  63 #       include <editline/readline.h>
  64 #       if HAVE_EDITLINE_HISTORY_H
  65 #               include <editline/history.h>
  66 #       endif
  67 #elif HAVE_READLINE_READLINE_H
  68 #       include <readline/readline.h>
  69 #       if HAVE_READLINE_HISTORY_H
  70 #               include <readline/history.h>
  71 #       endif
  72 #elif HAVE_READLINE_H
  73 #       include <readline.h>
  74 #       if HAVE_HISTORY_H
  75 #               include <history.h>
  76 #       endif
  77 #endif /* READLINEs */
  78
  79 #ifndef DEFAULT_SOCKET
  80 #       define DEFAULT_SOCKET "unix:"LOCALSTATEDIR"/run/sysdbd.sock"
  81 #endif
  82
  83 static const char *
  84 get_current_user(void)
  85 {
  86         struct passwd pw_entry;
  87         struct passwd *result = NULL;
  88
  89         uid_t uid;
  90
  91         /* needs to be static because we return a pointer into this buffer
  92          * to the caller */
  93         static char buf[1024];
  94
  95         int status;
  96
  97         uid = geteuid();
  98
  99         memset(&pw_entry, 0, sizeof(pw_entry));
 100         status = getpwuid_r(uid, &pw_entry, buf, sizeof(buf), &result);
 101
 102         if (status || (! result)) {
 103                 char errbuf[1024];
 104                 sdb_log(SDB_LOG_ERR, "Failed to determine current username: %s",
 105                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 106                 return NULL;
 107         }
 108         return result->pw_name;
 109 } /* get_current_user */
 110
 111 static const char *
 112 get_homedir(const char *username)
 113 {
 114         struct passwd pw_entry;
 115         struct passwd *result = NULL;
 116
 117         /* needs to be static because we return a pointer into this buffer
 118          * to the caller */
 119         static char buf[1024];
 120
 121         int status;
 122
 123         memset(&pw_entry, 0, sizeof(pw_entry));
 124         status = getpwnam_r(username, &pw_entry, buf, sizeof(buf), &result);
 125
 126         if (status || (! result)) {
 127                 char errbuf[1024];
 128                 sdb_log(SDB_LOG_WARNING, "Failed to determine home directory "
 129                                 "for user %s: %s", username,
 130                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 131                 return NULL;
 132         }
 133         return result->pw_dir;
 134 } /* get_homedir */
 135
 136 static void
 137 exit_usage(char *name, int status)
 138 {
 139         printf(
 140 "Usage: %s <options>\n"
 141
 142 "\nOptions:\n"
 143 "  -H HOST   the host to connect to\n"
 144 "            default: "DEFAULT_SOCKET"\n"
 145 "  -U USER   the username to connect as\n"
 146 "            default: %s\n"
 147 "  -c CMD    execute the specified command and then exit\n"
 148 "\n"
 149 "  -h        display this help and exit\n"
 150 "  -V        display the version number and copyright\n"
 151
 152 "\nSysDB client "SDB_CLIENT_VERSION_STRING SDB_CLIENT_VERSION_EXTRA", "
 153 PACKAGE_URL"\n", basename(name), get_current_user());
 154         exit(status);
 155 } /* exit_usage */
 156
 157 static void
 158 exit_version(void)
 159 {
 160         printf("SysDB version "SDB_CLIENT_VERSION_STRING
 161                         SDB_CLIENT_VERSION_EXTRA", built "BUILD_DATE"\n"
 162                         "using libsysdbclient version %s%s\n"
 163                         "Copyright (C) 2012-2014 "PACKAGE_MAINTAINER"\n"
 164
 165                         "\nThis is free software under the terms of the BSD license, see "
 166                         "the source for\ncopying conditions. There is NO WARRANTY; not "
 167                         "even for MERCHANTABILITY or\nFITNESS FOR A PARTICULAR "
 168                         "PURPOSE.\n", sdb_client_version_string(),
 169                         sdb_client_version_extra());
 170         exit(0);
 171 } /* exit_version */
 172
 173 static int
 174 execute_commands(sdb_client_t *client, sdb_llist_t *commands)
 175 {
 176         sdb_llist_iter_t *iter;
 177         int status = 0;
 178
 179         iter = sdb_llist_get_iter(commands);
 180         if (! iter) {
 181                 sdb_log(SDB_LOG_ERR, "Failed to iterate commands");
 182                 return 1;
 183         }
 184
 185         while (sdb_llist_iter_has_next(iter)) {
 186                 sdb_object_t *obj = sdb_llist_iter_get_next(iter);
 187                 int err;
 188
 189                 if (sdb_client_send(client, CONNECTION_QUERY,
 190                                         (uint32_t)strlen(obj->name), obj->name) <= 0) {
 191                         sdb_log(SDB_LOG_ERR, "Failed to send command '%s' to server",
 192                                         obj->name);
 193                         status = 1;
 194                         break;
 195                 }
 196                 err = sdb_command_print_reply(client);
 197                 if (err) {
 198                         if (err < 0)
 199                                 sdb_log(SDB_LOG_ERR, "Failed to read reply from server");
 200                         status = 1;
 201                         break;
 202                 }
 203         }
 204
 205         sdb_llist_iter_destroy(iter);
 206         return status;
 207 } /* execute_commands */
 208
 209 int
 210 main(int argc, char **argv)
 211 {
 212         const char *host = NULL;
 213         const char *user = NULL;
 214
 215         const char *homedir;
 216         char hist_file[1024] = "";
 217
 218         sdb_input_t input = SDB_INPUT_INIT;
 219         sdb_llist_t *commands = NULL;
 220
 221         while (42) {
 222                 int opt = getopt(argc, argv, "H:U:c:hV");
 223
 224                 if (-1 == opt)
 225                         break;
 226
 227                 switch (opt) {
 228                         case 'H':
 229                                 host = optarg;
 230                                 break;
 231                         case 'U':
 232                                 user = optarg;
 233                                 break;
 234
 235                         case 'c':
 236                                 {
 237                                         sdb_object_t *obj;
 238
 239                                         if (! commands)
 240                                                 commands = sdb_llist_create();
 241                                         if (! commands) {
 242                                                 sdb_log(SDB_LOG_ERR, "Failed to create list object");
 243                                                 exit(1);
 244                                         }
 245
 246                                         if (! (obj = sdb_object_create_T(optarg, sdb_object_t))) {
 247                                                 sdb_log(SDB_LOG_ERR, "Failed to create object");
 248                                                 exit(1);
 249                                         }
 250                                         if (sdb_llist_append(commands, obj)) {
 251                                                 sdb_log(SDB_LOG_ERR, "Failed to append command to list");
 252                                                 sdb_object_deref(obj);
 253                                                 exit(1);
 254                                         }
 255                                         sdb_object_deref(obj);
 256                                 }
 257                                 break;
 258
 259                         case 'h':
 260                                 exit_usage(argv[0], 0);
 261                                 break;
 262                         case 'V':
 263                                 exit_version();
 264                                 break;
 265                         default:
 266                                 exit_usage(argv[0], 1);
 267                 }
 268         }
 269
 270         if (optind < argc)
 271                 exit_usage(argv[0], 1);
 272
 273         if (! host)
 274                 host = DEFAULT_SOCKET;
 275         if (! user) {
 276                 user = get_current_user();
 277                 if (! user)
 278                         exit(1);
 279         }
 280
 281         input.client = sdb_client_create(host);
 282         if (! input.client) {
 283                 sdb_log(SDB_LOG_ERR, "Failed to create client object");
 284                 exit(1);
 285         }
 286         if (sdb_client_connect(input.client, user)) {
 287                 sdb_log(SDB_LOG_ERR, "Failed to connect to SysDBd");
 288                 sdb_client_destroy(input.client);
 289                 exit(1);
 290         }
 291
 292         if (commands) {
 293                 int status = execute_commands(input.client, commands);
 294                 sdb_llist_destroy(commands);
 295                 sdb_client_destroy(input.client);
 296                 exit(status);
 297         }
 298
 299         sdb_log(SDB_LOG_INFO, "SysDB client "SDB_CLIENT_VERSION_STRING
 300                         SDB_CLIENT_VERSION_EXTRA"\n");
 301
 302         using_history();
 303
 304         if ((homedir = get_homedir(user))) {
 305                 snprintf(hist_file, sizeof(hist_file) - 1,
 306                                 "%s/.sysdb_history", homedir);
 307                 hist_file[sizeof(hist_file) - 1] = '\0';
 308
 309                 errno = 0;
 310                 if (read_history(hist_file) && (errno != ENOENT)) {
 311                         char errbuf[1024];
 312                         sdb_log(SDB_LOG_WARNING, "Failed to load history (%s): %s",
 313                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 314                 }
 315         }
 316
 317         input.input = sdb_strbuf_create(2048);
 318         sdb_input_init(&input);
 319         sdb_input_mainloop();
 320
 321         if (hist_file[0] != '\0') {
 322                 errno = 0;
 323                 if (write_history(hist_file)) {
 324                         char errbuf[1024];
 325                         sdb_log(SDB_LOG_WARNING, "Failed to store history (%s): %s",
 326                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 327                 }
 328         }
 329
 330         sdb_client_destroy(input.client);
 331         sdb_strbuf_destroy(input.input);
 332         return 0;
 333 } /* main */
 334
 335 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 336