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