adu.c

   1 /** \file adu.c The main functions used by all modes of operation. */
   2 #include "adu.h"
   3 #include <dirent.h> /* readdir() */
   4 #include <pwd.h>
   5 #include "format.h"
   6 #include "user.h"
   7 #include "select.cmdline.h"
   8 #include "select.h"
   9 #include "cmdline.h"
  10 #include "fd.h"
  11 #include "string.h"
  12 #include "error.h"
  13
  14 DEFINE_ERRLIST;
  15 int osl_errno;
  16
  17 /** In case a signal is received, its number is stored here. */
  18 static int signum;
  19
  20 /** Command line and config file options. */
  21 struct gengetopt_args_info conf;
  22
  23 /** Options passed to --select-options. */
  24 struct select_args_info select_conf;
  25
  26 /** The number of different uids found so far. */
  27 uint32_t num_uids = 0;
  28
  29 /**
  30  * The table containing the directory names and statistics.
  31  */
  32 struct osl_table *dir_table = NULL;
  33
  34 static struct osl_column_description dir_table_cols[] = {
  35         [DT_NAME] = {
  36                 .storage_type = OSL_MAPPED_STORAGE,
  37                 .storage_flags = 0,
  38                 .name = "dir",
  39         },
  40         [DT_NUM] = {
  41                 .storage_type = OSL_MAPPED_STORAGE,
  42                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
  43                 .name = "num",
  44                 .compare_function = uint64_compare,
  45                 .data_size = sizeof(uint64_t)
  46         },
  47         [DT_PARENT_NUM] = {
  48                 .storage_type = OSL_MAPPED_STORAGE,
  49                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
  50                 .name = "parent_num",
  51                 .compare_function = size_compare,
  52                 .data_size = sizeof(uint64_t)
  53         },
  54         [DT_BYTES] = {
  55                 .storage_type = OSL_MAPPED_STORAGE,
  56                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
  57                 .compare_function = size_compare,
  58                 .name = "num_bytes",
  59                 .data_size = sizeof(uint64_t)
  60         },
  61         [DT_FILES] = {
  62                 .storage_type = OSL_MAPPED_STORAGE,
  63                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
  64                 .compare_function = size_compare,
  65                 .name = "num_files",
  66                 .data_size = sizeof(uint64_t)
  67         }
  68 };
  69
  70 static struct osl_table_description dir_table_desc = {
  71         .name = "dir_table",
  72         .num_columns = NUM_DT_COLUMNS,
  73         .flags = 0,
  74         .column_descriptions = dir_table_cols,
  75 };
  76
  77 /**
  78  * The log function.
  79  *
  80  * \param ll Loglevel.
  81  * \param fmt Usual format string.
  82  *
  83  * All XXX_LOG() macros use this function.
  84  */
  85 __printf_2_3 void __log(int ll, const char* fmt,...)
  86 {
  87         va_list argp;
  88         FILE *outfd;
  89         struct tm *tm;
  90         time_t t1;
  91         char str[255] = "";
  92
  93         if (ll < conf.loglevel_arg)
  94                 return;
  95         outfd = stderr;
  96         time(&t1);
  97         tm = localtime(&t1);
  98         strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
  99         fprintf(outfd, "%s ", str);
 100         va_start(argp, fmt);
 101         vfprintf(outfd, fmt, argp);
 102         va_end(argp);
 103 }
 104
 105 static void close_dir_table(void)
 106 {
 107         int ret;
 108
 109         if (!dir_table)
 110                 return;
 111         ret = osl(osl_close_table(dir_table, OSL_MARK_CLEAN));
 112         if (ret < 0)
 113                 ERROR_LOG("failed to close dir table: %s\n", adu_strerror(-ret));
 114         free((char *)dir_table_desc.dir);
 115         dir_table = NULL;
 116 }
 117
 118 void close_all_tables(void)
 119 {
 120         close_dir_table();
 121         close_user_tables();
 122 }
 123
 124 static void signal_handler(int s)
 125 {
 126         signum = s;
 127 }
 128
 129 void check_signals(void)
 130 {
 131         if (likely(!signum))
 132                 return;
 133         EMERG_LOG("caught signal %d\n", signum);
 134         close_all_tables();
 135         exit(EXIT_FAILURE);
 136 }
 137
 138 static int init_signals(void)
 139 {
 140         if (signal(SIGINT, &signal_handler) == SIG_ERR)
 141                 return -E_SIGNAL_SIG_ERR;
 142         if (signal(SIGTERM, &signal_handler) == SIG_ERR)
 143                 return -E_SIGNAL_SIG_ERR;
 144         if (signal(SIGPIPE, &signal_handler) == SIG_ERR)
 145                 return -E_SIGNAL_SIG_ERR;
 146         return 1;
 147 }
 148
 149 int open_dir_table(int create)
 150 {
 151         dir_table_desc.dir = adu_strdup(conf.database_dir_arg);
 152
 153         if (create) {
 154                 int ret = osl(osl_create_table(&dir_table_desc));
 155                 if (ret < 0) {
 156                         free((char *)dir_table_desc.dir);
 157                         return ret;
 158                 }
 159         }
 160         return osl(osl_open_table(&dir_table_desc, &dir_table));
 161 }
 162
 163 static int check_args(void)
 164 {
 165         if (conf.create_given && !conf.base_dir_given)
 166                 return -E_SYNTAX;
 167
 168         /* remove trailing slashes from base-dir arg */
 169         if (conf.base_dir_given) {
 170                 size_t len = strlen(conf.base_dir_arg);
 171                 for (;;) {
 172                         if (!len) /* empty string */
 173                                 return -ERRNO_TO_ERROR(EINVAL);
 174                         if (!--len) /* length 1 is always OK */
 175                                 break;
 176                         if (conf.base_dir_arg[len] != '/')
 177                                 break; /* no trailing slash, also OK */
 178                         conf.base_dir_arg[len] = '\0';
 179                 }
 180         }
 181         return 1;
 182 }
 183
 184 static int print_complete_help_and_die(void)
 185 {
 186         const char **line;
 187         select_cmdline_parser_init(&select_conf);
 188
 189         printf("%s-%s\n", CMDLINE_PARSER_PACKAGE, CMDLINE_PARSER_VERSION);
 190         printf("%s\n\n", gengetopt_args_info_purpose);
 191         printf("%s\n\n", gengetopt_args_info_usage);
 192
 193         if (conf.help_given)
 194                 line = gengetopt_args_info_help;
 195         else
 196                 line = gengetopt_args_info_detailed_help;
 197         for (; *line; line++)
 198                 printf("%s\n", *line);
 199
 200         if (conf.help_given)
 201                 line = select_args_info_help;
 202         else
 203                 line  = select_args_info_detailed_help;
 204         printf("Select options:\n");
 205         for (; *line; line++)
 206                 printf("%s\n", *line);
 207
 208         printf("Interactive commands:\n");
 209         print_interactive_help();
 210         exit(EXIT_FAILURE);
 211 }
 212
 213 int main(int argc, char **argv)
 214 {
 215         int ret;
 216         struct cmdline_parser_params params = {
 217                 .override = 0,
 218                 .initialize = 1,
 219                 .check_required = 0,
 220                 .check_ambiguity = 0,
 221                 .print_errors = 0
 222         };
 223         /* ignore errors and print complete help if --help was given */
 224         cmdline_parser_ext(argc, argv, &conf, &params);
 225         if (conf.help_given || conf.detailed_help_given)
 226                 print_complete_help_and_die();
 227         params.check_required = 1;
 228         params.check_ambiguity = 1;
 229         params.print_errors = 1;
 230         ret = cmdline_parser_ext(argc, argv, &conf, &params);
 231         if (ret)
 232                 exit(EXIT_FAILURE);
 233
 234         ret = check_args();
 235         if (ret < 0)
 236                 goto out;
 237         ret = init_signals();
 238         if (ret < 0)
 239                 goto out;
 240         ret = -E_SYNTAX;
 241         if (conf.select_given)
 242                 ret = com_select();
 243         else if (conf.create_given)
 244                 ret = com_create();
 245         else
 246                 ret = com_interactive();
 247         if (ret < 0)
 248                 goto out;
 249 out:
 250         if (ret < 0) {
 251                 ERROR_LOG("%s\n", adu_strerror(-ret));
 252                 return -EXIT_FAILURE;
 253         }
 254         return EXIT_SUCCESS;
 255 }