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 #include <openssl/ssl.h>
  81 #include <openssl/err.h>
  82
  83 #ifndef DEFAULT_SOCKET
  84 #       define DEFAULT_SOCKET "unix:"LOCALSTATEDIR"/run/sysdbd.sock"
  85 #endif
  86
  87 static const char *
  88 get_homedir(void)
  89 {
  90         char *username = sdb_get_current_user();
  91
  92         struct passwd pw_entry;
  93         struct passwd *result = NULL;
  94
  95         /* needs to be static because we return a pointer into this buffer
  96          * to the caller */
  97         static char buf[1024];
  98
  99         int status;
 100
 101         if (username) {
 102                 memset(&pw_entry, 0, sizeof(pw_entry));
 103                 status = getpwnam_r(username, &pw_entry, buf, sizeof(buf), &result);
 104         }
 105         else
 106                 status = -1;
 107
 108         if (status || (! result)) {
 109                 char errbuf[1024];
 110                 sdb_log(SDB_LOG_WARNING, "Failed to determine home directory "
 111                                 "for user %s: %s", username,
 112                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 113                 free(username);
 114                 return NULL;
 115         }
 116         free(username);
 117         return result->pw_dir;
 118 } /* get_homedir */
 119
 120 static void
 121 exit_usage(char *name, int status)
 122 {
 123         char *user = sdb_get_current_user();
 124         printf(
 125 "Usage: %s <options>\n"
 126
 127 "\nOptions:\n"
 128 "  -H HOST   the host to connect to\n"
 129 "            default: "DEFAULT_SOCKET"\n"
 130 "  -U USER   the username to connect as\n"
 131 "            default: %s\n"
 132 "  -c CMD    execute the specified command and then exit\n"
 133 "\n"
 134 "  -h        display this help and exit\n"
 135 "  -V        display the version number and copyright\n"
 136
 137 "\nSysDB client "SDB_CLIENT_VERSION_STRING SDB_CLIENT_VERSION_EXTRA", "
 138 PACKAGE_URL"\n", basename(name), user);
 139         free(user);
 140         exit(status);
 141 } /* exit_usage */
 142
 143 static void
 144 exit_version(void)
 145 {
 146         printf("SysDB version "SDB_CLIENT_VERSION_STRING
 147                         SDB_CLIENT_VERSION_EXTRA", built "BUILD_DATE"\n"
 148                         "using libsysdbclient version %s%s\n"
 149                         "Copyright (C) 2012-2014 "PACKAGE_MAINTAINER"\n"
 150
 151                         "\nThis is free software under the terms of the BSD license, see "
 152                         "the source for\ncopying conditions. There is NO WARRANTY; not "
 153                         "even for MERCHANTABILITY or\nFITNESS FOR A PARTICULAR "
 154                         "PURPOSE.\n", sdb_client_version_string(),
 155                         sdb_client_version_extra());
 156         exit(0);
 157 } /* exit_version */
 158
 159 static int
 160 execute_commands(sdb_client_t *client, sdb_llist_t *commands)
 161 {
 162         sdb_llist_iter_t *iter;
 163         int status = 0;
 164
 165         iter = sdb_llist_get_iter(commands);
 166         if (! iter) {
 167                 sdb_log(SDB_LOG_ERR, "Failed to iterate commands");
 168                 return 1;
 169         }
 170
 171         while (sdb_llist_iter_has_next(iter)) {
 172                 sdb_object_t *obj = sdb_llist_iter_get_next(iter);
 173
 174                 if (sdb_client_send(client, SDB_CONNECTION_QUERY,
 175                                         (uint32_t)strlen(obj->name), obj->name) <= 0) {
 176                         sdb_log(SDB_LOG_ERR, "Failed to send command '%s' to server",
 177                                         obj->name);
 178                         status = 1;
 179                         break;
 180                 }
 181
 182                 /* Wait for server replies. We might get any number of log messages
 183                  * but eventually see the reply to the query, which is either DATA or
 184                  * ERROR. */
 185                 while (42) {
 186                         status = sdb_command_print_reply(client);
 187                         if (status < 0) {
 188                                 sdb_log(SDB_LOG_ERR, "Failed to read reply from server");
 189                                 break;
 190                         }
 191
 192                         if ((status == SDB_CONNECTION_DATA)
 193                                         || (status == SDB_CONNECTION_ERROR))
 194                                 break;
 195                         if (status == SDB_CONNECTION_OK) {
 196                                 /* pre 0.4 versions used OK instead of DATA */
 197                                 sdb_log(SDB_LOG_WARNING, "Received unexpected OK status from "
 198                                                 "server in response to a QUERY (expected DATA); "
 199                                                 "assuming we're talking to an old server");
 200                                 break;
 201                         }
 202                 }
 203
 204                 if ((status != SDB_CONNECTION_OK) && (status != SDB_CONNECTION_DATA))
 205                         break; /* error */
 206         }
 207
 208         sdb_llist_iter_destroy(iter);
 209         return status;
 210 } /* execute_commands */
 211
 212 int
 213 main(int argc, char **argv)
 214 {
 215         const char *host = NULL;
 216
 217         const char *homedir;
 218         char hist_file[1024] = "";
 219
 220         sdb_input_t input = SDB_INPUT_INIT;
 221         sdb_llist_t *commands = NULL;
 222
 223         while (42) {
 224                 int opt = getopt(argc, argv, "H:U:c:hV");
 225
 226                 if (-1 == opt)
 227                         break;
 228
 229                 switch (opt) {
 230                         case 'H':
 231                                 host = optarg;
 232                                 break;
 233                         case 'U':
 234                                 input.user = optarg;
 235                                 break;
 236
 237                         case 'c':
 238                                 {
 239                                         sdb_object_t *obj;
 240
 241                                         if (! commands)
 242                                                 commands = sdb_llist_create();
 243                                         if (! commands) {
 244                                                 sdb_log(SDB_LOG_ERR, "Failed to create list object");
 245                                                 exit(1);
 246                                         }
 247
 248                                         if (! (obj = sdb_object_create_T(optarg, sdb_object_t))) {
 249                                                 sdb_log(SDB_LOG_ERR, "Failed to create object");
 250                                                 exit(1);
 251                                         }
 252                                         if (sdb_llist_append(commands, obj)) {
 253                                                 sdb_log(SDB_LOG_ERR, "Failed to append command to list");
 254                                                 sdb_object_deref(obj);
 255                                                 exit(1);
 256                                         }
 257                                         sdb_object_deref(obj);
 258                                 }
 259                                 break;
 260
 261                         case 'h':
 262                                 exit_usage(argv[0], 0);
 263                                 break;
 264                         case 'V':
 265                                 exit_version();
 266                                 break;
 267                         default:
 268                                 exit_usage(argv[0], 1);
 269                 }
 270         }
 271
 272         if (optind < argc)
 273                 exit_usage(argv[0], 1);
 274
 275         if (! host)
 276                 host = DEFAULT_SOCKET;
 277         if (! input.user)
 278                 input.user = sdb_get_current_user();
 279         else
 280                 input.user = strdup(input.user);
 281         if (! input.user)
 282                 exit(1);
 283
 284         SSL_load_error_strings();
 285         OpenSSL_add_ssl_algorithms();
 286
 287         input.client = sdb_client_create(host);
 288         if (! input.client) {
 289                 sdb_log(SDB_LOG_ERR, "Failed to create client object");
 290                 free(input.user);
 291                 exit(1);
 292         }
 293         if (sdb_client_connect(input.client, input.user)) {
 294                 sdb_log(SDB_LOG_ERR, "Failed to connect to SysDBd");
 295                 sdb_client_destroy(input.client);
 296                 free(input.user);
 297                 exit(1);
 298         }
 299
 300         if (commands) {
 301                 int status = execute_commands(input.client, commands);
 302                 sdb_llist_destroy(commands);
 303                 sdb_client_destroy(input.client);
 304                 free(input.user);
 305                 if ((status != SDB_CONNECTION_OK) && (status != SDB_CONNECTION_DATA))
 306                         exit(1);
 307                 exit(0);
 308         }
 309
 310         sdb_log(SDB_LOG_INFO, "SysDB client "SDB_CLIENT_VERSION_STRING
 311                         SDB_CLIENT_VERSION_EXTRA" (libsysdbclient %s%s)\n",
 312                         sdb_client_version_string(), sdb_client_version_extra());
 313
 314         using_history();
 315
 316         if ((homedir = get_homedir())) {
 317                 snprintf(hist_file, sizeof(hist_file) - 1,
 318                                 "%s/.sysdb_history", homedir);
 319                 hist_file[sizeof(hist_file) - 1] = '\0';
 320
 321                 errno = 0;
 322                 if (read_history(hist_file) && (errno != ENOENT)) {
 323                         char errbuf[1024];
 324                         sdb_log(SDB_LOG_WARNING, "Failed to load history (%s): %s",
 325                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 326                 }
 327         }
 328         free(input.user);
 329
 330         input.input = sdb_strbuf_create(2048);
 331         sdb_input_init(&input);
 332         sdb_input_mainloop();
 333
 334         sdb_client_shutdown(input.client, SHUT_WR);
 335         while (! sdb_client_eof(input.client)) {
 336                 /* wait for remaining data to arrive */
 337                 sdb_command_print_reply(input.client);
 338         }
 339
 340         if (hist_file[0] != '\0') {
 341                 errno = 0;
 342                 if (write_history(hist_file)) {
 343                         char errbuf[1024];
 344                         sdb_log(SDB_LOG_WARNING, "Failed to store history (%s): %s",
 345                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 346                 }
 347         }
 348
 349         sdb_client_destroy(input.client);
 350         sdb_strbuf_destroy(input.input);
 351
 352         ERR_free_strings();
 353         return 0;
 354 } /* main */
 355
 356 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 357