src/client/sysdb.c

   1 /*
   2  * SysDB - src/client/sysdb.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 "client/sysdb.h"
  33 #include "client/sock.h"
  34 #include "utils/error.h"
  35
  36 #include <errno.h>
  37
  38 #if HAVE_LIBGEN_H
  39 #       include <libgen.h>
  40 #else /* HAVE_LIBGEN_H */
  41 #       define basename(path) (path)
  42 #endif /* ! HAVE_LIBGEN_H */
  43
  44 #include <sys/stat.h>
  45 #include <fcntl.h>
  46
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50
  51 #include <unistd.h>
  52
  53 #include <sys/types.h>
  54
  55 #include <pwd.h>
  56
  57 #if HAVE_EDITLINE_READLINE_H
  58 #       include <editline/readline.h>
  59 #       if HAVE_EDITLINE_HISTORY_H
  60 #               include <editline/history.h>
  61 #       endif
  62 #elif HAVE_READLINE_READLINE_H
  63 #       include <readline/readline.h>
  64 #       if HAVE_READLINE_HISTORY_H
  65 #               include <readline/history.h>
  66 #       endif
  67 #elif HAVE_READLINE_H
  68 #       include <readline.h>
  69 #       if HAVE_HISTORY_H
  70 #               include <history.h>
  71 #       endif
  72 #endif /* READLINEs */
  73
  74 #ifndef DEFAULT_SOCKET
  75 #       define DEFAULT_SOCKET "unix:"LOCALSTATEDIR"/run/sysdbd.sock"
  76 #endif
  77
  78 static void
  79 exit_usage(char *name, int status)
  80 {
  81         printf(
  82 "Usage: %s <options>\n"
  83
  84 "\nOptions:\n"
  85 "  -h        display this help and exit\n"
  86 "  -V        display the version number and copyright\n"
  87
  88 "\nSysDB client "SDB_CLIENT_VERSION_STRING SDB_CLIENT_VERSION_EXTRA", "
  89 PACKAGE_URL"\n", basename(name));
  90         exit(status);
  91 } /* exit_usage */
  92
  93 static void
  94 exit_version(void)
  95 {
  96         printf("SysDB version "SDB_CLIENT_VERSION_STRING
  97                         SDB_CLIENT_VERSION_EXTRA", built "BUILD_DATE"\n"
  98                         "using libsysdbclient version %s%s\n"
  99                         "Copyright (C) 2012-2013 "PACKAGE_MAINTAINER"\n"
 100
 101                         "\nThis is free software under the terms of the BSD license, see "
 102                         "the source for\ncopying conditions. There is NO WARRANTY; not "
 103                         "even for MERCHANTABILITY or\nFITNESS FOR A PARTICULAR "
 104                         "PURPOSE.\n", sdb_client_version_string(),
 105                         sdb_client_version_extra());
 106         exit(0);
 107 } /* exit_version */
 108
 109 static const char *
 110 get_current_user(void)
 111 {
 112         struct passwd pw_entry;
 113         struct passwd *result = NULL;
 114
 115         uid_t uid;
 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         uid = geteuid();
 124
 125         memset(&pw_entry, 0, sizeof(pw_entry));
 126         status = getpwuid_r(uid, &pw_entry, buf, sizeof(buf), &result);
 127
 128         if (status || (! result)) {
 129                 char errbuf[1024];
 130                 sdb_log(SDB_LOG_ERR, "Failed to determine current username: %s",
 131                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 132                 return NULL;
 133         }
 134         return result->pw_name;
 135 } /* get_current_user */
 136
 137 static const char *
 138 get_homedir(const char *username)
 139 {
 140         struct passwd pw_entry;
 141         struct passwd *result = NULL;
 142
 143         /* needs to be static because we return a pointer into this buffer
 144          * to the caller */
 145         static char buf[1024];
 146
 147         int status;
 148
 149         memset(&pw_entry, 0, sizeof(pw_entry));
 150         status = getpwnam_r(username, &pw_entry, buf, sizeof(buf), &result);
 151
 152         if (status || (! result)) {
 153                 char errbuf[1024];
 154                 sdb_log(SDB_LOG_WARNING, "Failed to determine home directory "
 155                                 "for user %s: %s", username,
 156                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 157                 return NULL;
 158         }
 159         return result->pw_dir;
 160 } /* get_homedir */
 161
 162 int
 163 main(int argc, char **argv)
 164 {
 165         sdb_client_t *client;
 166
 167         const char *host = NULL;
 168         const char *user = NULL;
 169
 170         const char *homedir;
 171         char hist_file[1024] = "";
 172
 173         while (42) {
 174                 int opt = getopt(argc, argv, "H:U:hV");
 175
 176                 if (-1 == opt)
 177                         break;
 178
 179                 switch (opt) {
 180                         case 'H':
 181                                 host = optarg;
 182                                 break;
 183                         case 'U':
 184                                 user = optarg;
 185                                 break;
 186
 187                         case 'h':
 188                                 exit_usage(argv[0], 0);
 189                                 break;
 190                         case 'V':
 191                                 exit_version();
 192                                 break;
 193                         default:
 194                                 exit_usage(argv[0], 1);
 195                 }
 196         }
 197
 198         if (optind < argc)
 199                 exit_usage(argv[0], 1);
 200
 201         if (! host)
 202                 host = DEFAULT_SOCKET;
 203         if (! user) {
 204                 user = get_current_user();
 205                 if (! user)
 206                         exit(1);
 207         }
 208
 209         client = sdb_client_create(host);
 210         if (! client) {
 211                 sdb_log(SDB_LOG_ERR, "Failed to create client object");
 212                 exit(1);
 213         }
 214         if (sdb_client_connect(client, user)) {
 215                 sdb_log(SDB_LOG_ERR, "Failed to connect to SysDBd");
 216                 sdb_client_destroy(client);
 217                 exit(1);
 218         }
 219
 220         sdb_log(SDB_LOG_INFO, "SysDB client "SDB_CLIENT_VERSION_STRING
 221                         SDB_CLIENT_VERSION_EXTRA"\n");
 222
 223         using_history();
 224
 225         if ((homedir = get_homedir(user))) {
 226                 snprintf(hist_file, sizeof(hist_file) - 1,
 227                                 "%s/.sysdb_history", homedir);
 228                 hist_file[sizeof(hist_file) - 1] = '\0';
 229
 230                 errno = 0;
 231                 if (read_history(hist_file) && (errno != ENOENT)) {
 232                         char errbuf[1024];
 233                         sdb_log(SDB_LOG_WARNING, "Failed to load history (%s): %s",
 234                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 235                 }
 236         }
 237
 238         while (42) {
 239                 char *line = readline("sysdb> ");
 240
 241                 if (! line)
 242                         break;
 243                 if (*line == '\0')
 244                         continue;
 245
 246                 if (*line != ' ')
 247                         add_history(line);
 248         }
 249
 250         if (hist_file[0] != '\0') {
 251                 errno = 0;
 252                 if (write_history(hist_file)) {
 253                         char errbuf[1024];
 254                         sdb_log(SDB_LOG_WARNING, "Failed to store history (%s): %s",
 255                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 256                 }
 257         }
 258
 259         sdb_client_destroy(client);
 260         return 0;
 261 } /* main */
 262
 263 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 264