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/input.h"
  33
  34 #include "client/sysdb.h"
  35 #include "client/sock.h"
  36 #include "utils/error.h"
  37 #include "utils/strbuf.h"
  38
  39 #include <errno.h>
  40
  41 #if HAVE_LIBGEN_H
  42 #       include <libgen.h>
  43 #else /* HAVE_LIBGEN_H */
  44 #       define basename(path) (path)
  45 #endif /* ! HAVE_LIBGEN_H */
  46
  47 #include <sys/stat.h>
  48 #include <fcntl.h>
  49
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53
  54 #include <unistd.h>
  55
  56 #include <sys/types.h>
  57
  58 #include <pwd.h>
  59
  60 #if HAVE_EDITLINE_READLINE_H
  61 #       include <editline/readline.h>
  62 #       if HAVE_EDITLINE_HISTORY_H
  63 #               include <editline/history.h>
  64 #       endif
  65 #elif HAVE_READLINE_READLINE_H
  66 #       include <readline/readline.h>
  67 #       if HAVE_READLINE_HISTORY_H
  68 #               include <readline/history.h>
  69 #       endif
  70 #elif HAVE_READLINE_H
  71 #       include <readline.h>
  72 #       if HAVE_HISTORY_H
  73 #               include <history.h>
  74 #       endif
  75 #endif /* READLINEs */
  76
  77 #ifndef DEFAULT_SOCKET
  78 #       define DEFAULT_SOCKET "unix:"LOCALSTATEDIR"/run/sysdbd.sock"
  79 #endif
  80
  81 static void
  82 exit_usage(char *name, int status)
  83 {
  84         printf(
  85 "Usage: %s <options>\n"
  86
  87 "\nOptions:\n"
  88 "  -h        display this help and exit\n"
  89 "  -V        display the version number and copyright\n"
  90
  91 "\nSysDB client "SDB_CLIENT_VERSION_STRING SDB_CLIENT_VERSION_EXTRA", "
  92 PACKAGE_URL"\n", basename(name));
  93         exit(status);
  94 } /* exit_usage */
  95
  96 static void
  97 exit_version(void)
  98 {
  99         printf("SysDB version "SDB_CLIENT_VERSION_STRING
 100                         SDB_CLIENT_VERSION_EXTRA", built "BUILD_DATE"\n"
 101                         "using libsysdbclient version %s%s\n"
 102                         "Copyright (C) 2012-2013 "PACKAGE_MAINTAINER"\n"
 103
 104                         "\nThis is free software under the terms of the BSD license, see "
 105                         "the source for\ncopying conditions. There is NO WARRANTY; not "
 106                         "even for MERCHANTABILITY or\nFITNESS FOR A PARTICULAR "
 107                         "PURPOSE.\n", sdb_client_version_string(),
 108                         sdb_client_version_extra());
 109         exit(0);
 110 } /* exit_version */
 111
 112 static const char *
 113 get_current_user(void)
 114 {
 115         struct passwd pw_entry;
 116         struct passwd *result = NULL;
 117
 118         uid_t uid;
 119
 120         /* needs to be static because we return a pointer into this buffer
 121          * to the caller */
 122         static char buf[1024];
 123
 124         int status;
 125
 126         uid = geteuid();
 127
 128         memset(&pw_entry, 0, sizeof(pw_entry));
 129         status = getpwuid_r(uid, &pw_entry, buf, sizeof(buf), &result);
 130
 131         if (status || (! result)) {
 132                 char errbuf[1024];
 133                 sdb_log(SDB_LOG_ERR, "Failed to determine current username: %s",
 134                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 135                 return NULL;
 136         }
 137         return result->pw_name;
 138 } /* get_current_user */
 139
 140 static const char *
 141 get_homedir(const char *username)
 142 {
 143         struct passwd pw_entry;
 144         struct passwd *result = NULL;
 145
 146         /* needs to be static because we return a pointer into this buffer
 147          * to the caller */
 148         static char buf[1024];
 149
 150         int status;
 151
 152         memset(&pw_entry, 0, sizeof(pw_entry));
 153         status = getpwnam_r(username, &pw_entry, buf, sizeof(buf), &result);
 154
 155         if (status || (! result)) {
 156                 char errbuf[1024];
 157                 sdb_log(SDB_LOG_WARNING, "Failed to determine home directory "
 158                                 "for user %s: %s", username,
 159                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 160                 return NULL;
 161         }
 162         return result->pw_dir;
 163 } /* get_homedir */
 164
 165 int
 166 main(int argc, char **argv)
 167 {
 168         const char *host = NULL;
 169         const char *user = NULL;
 170
 171         const char *homedir;
 172         char hist_file[1024] = "";
 173
 174         sdb_input_t input = SDB_INPUT_INIT;
 175
 176         while (42) {
 177                 int opt = getopt(argc, argv, "H:U:hV");
 178
 179                 if (-1 == opt)
 180                         break;
 181
 182                 switch (opt) {
 183                         case 'H':
 184                                 host = optarg;
 185                                 break;
 186                         case 'U':
 187                                 user = optarg;
 188                                 break;
 189
 190                         case 'h':
 191                                 exit_usage(argv[0], 0);
 192                                 break;
 193                         case 'V':
 194                                 exit_version();
 195                                 break;
 196                         default:
 197                                 exit_usage(argv[0], 1);
 198                 }
 199         }
 200
 201         if (optind < argc)
 202                 exit_usage(argv[0], 1);
 203
 204         if (! host)
 205                 host = DEFAULT_SOCKET;
 206         if (! user) {
 207                 user = get_current_user();
 208                 if (! user)
 209                         exit(1);
 210         }
 211
 212         input.client = sdb_client_create(host);
 213         if (! input.client) {
 214                 sdb_log(SDB_LOG_ERR, "Failed to create client object");
 215                 exit(1);
 216         }
 217         if (sdb_client_connect(input.client, user)) {
 218                 sdb_log(SDB_LOG_ERR, "Failed to connect to SysDBd");
 219                 sdb_client_destroy(input.client);
 220                 exit(1);
 221         }
 222
 223         sdb_log(SDB_LOG_INFO, "SysDB client "SDB_CLIENT_VERSION_STRING
 224                         SDB_CLIENT_VERSION_EXTRA"\n");
 225
 226         using_history();
 227
 228         if ((homedir = get_homedir(user))) {
 229                 snprintf(hist_file, sizeof(hist_file) - 1,
 230                                 "%s/.sysdb_history", homedir);
 231                 hist_file[sizeof(hist_file) - 1] = '\0';
 232
 233                 errno = 0;
 234                 if (read_history(hist_file) && (errno != ENOENT)) {
 235                         char errbuf[1024];
 236                         sdb_log(SDB_LOG_WARNING, "Failed to load history (%s): %s",
 237                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 238                 }
 239         }
 240
 241         input.input = sdb_strbuf_create(2048);
 242         sdb_input_init(&input);
 243         sdb_input_mainloop();
 244
 245         if (hist_file[0] != '\0') {
 246                 errno = 0;
 247                 if (write_history(hist_file)) {
 248                         char errbuf[1024];
 249                         sdb_log(SDB_LOG_WARNING, "Failed to store history (%s): %s",
 250                                         hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
 251                 }
 252         }
 253
 254         sdb_client_destroy(input.client);
 255         sdb_strbuf_destroy(input.input);
 256         return 0;
 257 } /* main */
 258
 259 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 260