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 #include "utils/os.h"
  41
  42 #include <errno.h>
  43
  44 #if HAVE_LIBGEN_H
  45 #       include <libgen.h>
  46 #else /* HAVE_LIBGEN_H */
  47 #       define basename(path) (path)
  48 #endif /* ! HAVE_LIBGEN_H */
  49
  50 #include <sys/stat.h>
  51 #include <fcntl.h>
  52
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56
  57 #include <unistd.h>
  58
  59 #include <sys/types.h>
  60
  61 #include <pwd.h>
  62
  63 #if HAVE_EDITLINE_READLINE_H
  64 #       include <editline/readline.h>
  65 #       if HAVE_EDITLINE_HISTORY_H
  66 #               include <editline/history.h>
  67 #       endif
  68 #elif HAVE_READLINE_READLINE_H
  69 #       include <readline/readline.h>
  70 #       if HAVE_READLINE_HISTORY_H
  71 #               include <readline/history.h>
  72 #       endif
  73 #elif HAVE_READLINE_H
  74 #       include <readline.h>
  75 #       if HAVE_HISTORY_H
  76 #               include <history.h>
  77 #       endif
  78 #endif /* READLINEs */
  79
  80 #ifndef DEFAULT_SOCKET
  81 #       define DEFAULT_SOCKET "unix:"LOCALSTATEDIR"/run/sysdbd.sock"
  82 #endif
  83
  84 static const char *
  85 get_homedir(void)
  86 {
  87         char *username = sdb_get_current_user();
  88
  89         struct passwd pw_entry;
  90         struct passwd *result = NULL;
  91
  92         /* needs to be static because we return a pointer into this buffer
  93          * to the caller */
  94         static char buf[1024];
  95
  96         int status;
  97
  98         if (username) {
  99                 memset(&pw_entry, 0, sizeof(pw_entry));
 100                 status = getpwnam_r(username, &pw_entry, buf, sizeof(buf), &result);
 101         }
 102         else
 103                 status = -1;
 104
 105         if (status || (! result)) {
 106                 char errbuf[1024];
 107                 sdb_log(SDB_LOG_WARNING, "Failed to determine home directory "
 108                                 "for user %s: %s", username,
 109                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 110                 free(username);
 111                 return NULL;
 112         }
 113         free(username);
 114         return result->pw_dir;
 115 } /* get_homedir */
 116
 117 static void
 118 exit_usage(char *name, int status)
 119 {
 120         char *user = sdb_get_current_user();
 121         printf(
 122 "Usage: %s <options>\n"
 123
 124 "\nOptions:\n"
 125 "  -H HOST   the host to connect to\n"
 126 "            default: "DEFAULT_SOCKET"\n"
 127 "  -U USER   the username to connect as\n"
 128 "            default: %s\n"
 129 "  -c CMD    execute the specified command and then exit\n"
 130 "\n"
 131 "  -h        display this help and exit\n"
 132 "  -V        display the version number and copyright\n"
 133
 134 "\nSysDB client "SDB_CLIENT_VERSION_STRING SDB_CLIENT_VERSION_EXTRA", "
 135 PACKAGE_URL"\n", basename(name), user);
 136         free(user);
 137         exit(status);
 138 } /* exit_usage */
 139
 140 static void
 141 exit_version(void)
 142 {
 143         printf("SysDB version "SDB_CLIENT_VERSION_STRING
 144                         SDB_CLIENT_VERSION_EXTRA", built "BUILD_DATE"\n"
 145                         "using libsysdbclient version %s%s\n"
 146                         "Copyright (C) 2012-2014 "PACKAGE_MAINTAINER"\n"
 147
 148                         "\nThis is free software under the terms of the BSD license, see "
 149                         "the source for\ncopying conditions. There is NO WARRANTY; not "
 150                         "even for MERCHANTABILITY or\nFITNESS FOR A PARTICULAR "
 151                         "PURPOSE.\n", sdb_client_version_string(),
 152                         sdb_client_version_extra());
 153         exit(0);
 154 } /* exit_version */
 155
 156 static int
 157 execute_commands(sdb_client_t *client, sdb_llist_t *commands)
 158 {
 159         sdb_llist_iter_t *iter;
 160         int status = 0;
 161
 162         iter = sdb_llist_get_iter(commands);
 163         if (! iter) {
 164                 sdb_log(SDB_LOG_ERR, "Failed to iterate commands");
 165                 return 1;
 166         }
 167
 168         while (sdb_llist_iter_has_next(iter)) {
 169                 sdb_object_t *obj = sdb_llist_iter_get_next(iter);
 170
 171                 if (sdb_client_send(client, SDB_CONNECTION_QUERY,
 172                                         (uint32_t)strlen(obj->name), obj->name) <= 0) {
 173                         sdb_log(SDB_LOG_ERR, "Failed to send command '%s' to server",
 174                                         obj->name);
 175                         status = 1;
 176                         break;
 177                 }
 178
 179                 /* Wait for server replies. We might get any number of log messages
 180                  * but eventually see the reply to the query, which is either DATA or
 181                  * ERROR. */
 182                 while (42) {
 183                         status = sdb_command_print_reply(client);
 184                         if (status < 0) {
 185                                 sdb_log(SDB_LOG_ERR, "Failed to read reply from server");
 186                                 break;
 187                         }
 188
 189                         if ((status == SDB_CONNECTION_DATA)
 190                                         || (status == SDB_CONNECTION_ERROR))
 191                                 break;
 192                         if (status == SDB_CONNECTION_OK) {
 193                                 /* pre 0.4 versions used OK instead of DATA */
 194                                 sdb_log(SDB_LOG_WARNING, "Received unexpected OK status from "
 195                                                 "server in response to a QUERY (expected DATA); "
 196                                                 "assuming we're talking to an old server");
 197                                 break;
 198                         }
 199                 }
 200
 201                 if ((status != SDB_CONNECTION_OK) && (status != SDB_CONNECTION_DATA))
 202                         break; /* error */
 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
 214         const char *homedir;
 215         char hist_file[1024] = "";
 216
 217         sdb_input_t input = SDB_INPUT_INIT;
 218         sdb_llist_t *commands = NULL;
 219
 220         while (42) {
 221                 int opt = getopt(argc, argv, "H:U:c:hV");
 222
 223                 if (-1 == opt)
 224                         break;
 225
 226                 switch (opt) {
 227                         case 'H':
 228                                 host = optarg;
 229                                 break;
 230                         case 'U':
 231                                 input.user = optarg;
 232                                 break;
 233
 234                         case 'c':
 235                                 {
 236                                         sdb_object_t *obj;
 237
 238                                         if (! commands)
 239                                                 commands = sdb_llist_create();
 240                                         if (! commands) {
 241                                                 sdb_log(SDB_LOG_ERR, "Failed to create list object");
 242                                                 exit(1);
 243                                         }
 244
 245                                         if (! (obj = sdb_object_create_T(optarg, sdb_object_t))) {
 246                                                 sdb_log(SDB_LOG_ERR, "Failed to create object");
 247                                                 exit(1);
 248                                         }
 249                                         if (sdb_llist_append(commands, obj)) {
 250                                                 sdb_log(SDB_LOG_ERR, "Failed to append command to list");
 251                                                 sdb_object_deref(obj);
 252                                                 exit(1);
 253                                         }
 254                                         sdb_object_deref(obj);
 255                                 }
 256                                 break;
 257
 258                         case 'h':
 259                                 exit_usage(argv[0], 0);
 260                                 break;
 261                         case 'V':
 262                                 exit_version();
 263                                 break;
 264                         default:
 265                                 exit_usage(argv[0], 1);
 266                 }
 267         }
 268
 269         if (optind < argc)
 270                 exit_usage(argv[0], 1);
 271
 272         if (! host)
 273                 host = DEFAULT_SOCKET;
 274         if (! input.user)
 275                 input.user = sdb_get_current_user();
 276         else
 277                 input.user = strdup(input.user);
 278         if (! input.user)
 279                 exit(1);
 280
 281         input.client = sdb_client_create(host);
 282         if (! input.client) {
 283                 sdb_log(SDB_LOG_ERR, "Failed to create client object");
 284                 free(input.user);
 285                 exit(1);
 286         }
 287         if (sdb_client_connect(input.client, input.user)) {
 288                 sdb_log(SDB_LOG_ERR, "Failed to connect to SysDBd");
 289                 sdb_client_destroy(input.client);
 290                 free(input.user);
 291                 exit(1);
 292         }
 293
 294         if (commands) {
 295                 int status = execute_commands(input.client, commands);
 296                 sdb_llist_destroy(commands);
 297                 sdb_client_destroy(input.client);
 298                 free(input.user);
 299                 if ((status != SDB_CONNECTION_OK) && (status != SDB_CONNECTION_DATA))
 300                         exit(1);
 301                 exit(0);
 302         }
 303
 304         sdb_log(SDB_LOG_INFO, "SysDB client "SDB_CLIENT_VERSION_STRING
 305                         SDB_CLIENT_VERSION_EXTRA" (libsysdbclient %s%s)\n",
 306                         sdb_client_version_string(), sdb_client_version_extra());
 307
 308         using_history();
 309
 310         if ((homedir = get_homedir())) {
 311                 snprintf(hist_file, sizeof(hist_file) - 1,
 312                                 "%s/.sysdb_history", homedir);
 313                 hist_file[sizeof(hist_file) - 1] = '\0';
 314
 315                 errno = 0;
 316                 if (read_history(hist_file) && (errno != ENOENT)) {
 317                         char errbuf[1024];
 318                         sdb_log(SDB_LOG_WARNING, "Failed to load history (%s): %s",
 319                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 320                 }
 321         }
 322         free(input.user);
 323
 324         input.input = sdb_strbuf_create(2048);
 325         sdb_input_init(&input);
 326         sdb_input_mainloop();
 327
 328         sdb_client_shutdown(input.client, SHUT_WR);
 329         while (! sdb_client_eof(input.client)) {
 330                 /* wait for remaining data to arrive */
 331                 sdb_command_print_reply(input.client);
 332         }
 333
 334         if (hist_file[0] != '\0') {
 335                 errno = 0;
 336                 if (write_history(hist_file)) {
 337                         char errbuf[1024];
 338                         sdb_log(SDB_LOG_WARNING, "Failed to store history (%s): %s",
 339                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 340                 }
 341         }
 342
 343         sdb_client_destroy(input.client);
 344         sdb_strbuf_destroy(input.input);
 345         return 0;
 346 } /* main */
 347
 348 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 349