Add documentation of DEFINE_ERRLIST.
[adu.git] / adu.c
diff --git a/adu.c b/adu.c
index b311a38..b8c7b68 100644 (file)
--- a/adu.c
+++ b/adu.c
+/*
+ * Copyright (C) 2008 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+/** \file adu.c \brief The main functions used by all modes of operation. */
+
+/**
+ * \mainpage adu API reference
+ *
+ * - Modes of operation: \ref select.c, \ref create.c, \ref interactive.c
+ * - User handling: \ref user.c
+ * - Error handling: \ref error.h
+ * - Library-type functions: \ref fd.c, \ref format.c, \ref string.c, \ref portable_io.h
+ * - Generated files: \ref cmdline.h, \ref select.cmdline.h
+ */
+
 #include "adu.h"
 #include <dirent.h> /* readdir() */
-
-#include "gcc-compat.h"
-#include "osl.h"
+#include <pwd.h>
+#include "format.h"
+#include "user.h"
+#include "select.cmdline.h"
+#include "select.h"
+#include "cmdline.h"
 #include "fd.h"
-#include "hash.h"
 #include "string.h"
 #include "error.h"
 
+/** Define the array of error descriptions. */
 DEFINE_ERRLIST;
 
-/** evaluates to 1 if x < y, to -1 if x > y and to 0 if x == y */
-#define NUM_COMPARE(x, y) ((int)((x) < (y)) - (int)((x) > (y)))
-
-
 /**
- * The log function.
- *
- * \param ll Loglevel.
- * \param fml Usual format string.
+ * The error code of the last osl library function.
  *
- * All XXX_LOG() macros use this function.
+ * \sa osl().
  */
-__printf_2_3 void __log(int ll, const char* fmt,...)
-{
-       va_list argp;
-       FILE *outfd;
-       struct tm *tm;
-       time_t t1;
-       char str[255] = "";
+int osl_errno;
 
-       if (ll < 4)
-               return;
-       outfd = stderr;
-       time(&t1);
-       tm = localtime(&t1);
-       strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
-       fprintf(outfd, "%s ", str);
-       va_start(argp, fmt);
-       vfprintf(outfd, fmt, argp);
-       va_end(argp);
-}
+/** In case a signal is received, its number is stored here. */
+static int signum;
 
-/**
- * Compare the size of two directories
- *
- * \param obj1 Pointer to the first object.
- * \param obj2 Pointer to the second object.
- *
- * This function first compares the size values as usual integers. If they compare as
- * equal, the address of \a obj1 and \a obj2 are compared. So this compare function
- * returns zero if and only if \a obj1 and \a obj2 point to the same memory area.
- */
-static int size_compare(const struct osl_object *obj1, const struct osl_object *obj2)
-{
-       uint64_t d1 = *(uint64_t *)obj1->data;
-       uint64_t d2 = *(uint64_t *)obj2->data;
-       int ret = NUM_COMPARE(d2, d1);
+/** Command line and config file options. */
+struct gengetopt_args_info conf;
+
+/** Options passed to --select-options. */
+struct select_args_info select_conf;
 
-       if (ret)
-               return ret;
-       //INFO_LOG("addresses: %p, %p\n", obj1->data, obj2->data);
-       return NUM_COMPARE(obj2->data, obj1->data);
-}
 
 /**
- * Compare two osl objects of string type.
- *
- * \param obj1 Pointer to the first object.
- * \param obj2 Pointer to the second object.
- *
- * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
- * are taken into account.
- *
- * \return It returns an integer less than, equal to, or greater than zero if
- * \a obj1 is found, respectively, to be less than, to match, or be greater than
- * obj2.
- *
- * \sa strcmp(3), strncmp(3), osl_compare_func.
+ * The table containing the directory names and statistics.
  */
-int string_compare(const struct osl_object *obj1, const struct osl_object *obj2)
-{
-       const char *str1 = (const char *)obj1->data;
-       const char *str2 = (const char *)obj2->data;
-       return strncmp(str1, str2, MIN(obj1->size, obj2->size));
-}
-
-/** The columns of the directory table. */
-enum dir_table_columns {
-       /** The name of the directory. */
-       DT_NAME,
-       /** The dir count number. */
-       DT_NUM,
-       /** The number of bytes of all regular files. */
-       DT_BYTES,
-       /** The number of all regular files. */
-       DT_FILES,
-       /** Number of columns in this table. */
-       NUM_DT_COLUMNS
-};
+struct osl_table *dir_table = NULL;
 
 static struct osl_column_description dir_table_cols[] = {
        [DT_NAME] = {
                .storage_type = OSL_MAPPED_STORAGE,
-               .storage_flags = OSL_RBTREE | OSL_UNIQUE,
+               .storage_flags = 0,
                .name = "dir",
-               .compare_function = string_compare,
        },
        [DT_NUM] = {
                .storage_type = OSL_MAPPED_STORAGE,
                .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
                .name = "num",
-               .compare_function = uint32_compare,
-               .data_size = sizeof(uint32_t)
+               .compare_function = uint64_compare,
+               .data_size = sizeof(uint64_t)
+       },
+       [DT_PARENT_NUM] = {
+               .storage_type = OSL_MAPPED_STORAGE,
+               .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
+               .name = "parent_num",
+               .compare_function = size_compare,
+               .data_size = sizeof(uint64_t)
        },
        [DT_BYTES] = {
                .storage_type = OSL_MAPPED_STORAGE,
@@ -135,511 +94,221 @@ static struct osl_table_description dir_table_desc = {
        .num_columns = NUM_DT_COLUMNS,
        .flags = 0,
        .column_descriptions = dir_table_cols,
-       .dir = "/tmp/adu"
 };
 
-/** The columns of the id table. */
-enum id_table_columns {
-       /** The user id. */
-       IDT_UID,
-       /** The number of bytes of all regular files owned by this id. */
-       IDT_BYTES,
-       /** The number of regular files owned by this id. */
-       IDT_FILES,
-       /** The user table for this uid. */
-       IDT_TABLE,
-       /** Number of columns in this table. */
-       NUM_IDT_COLUMNS
-};
-
-static struct osl_column_description id_table_cols[] = {
-       [IDT_UID] = {
-               .storage_type = OSL_MAPPED_STORAGE,
-               .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
-               .name = "uid",
-               .compare_function = uint32_compare,
-               .data_size = sizeof(uint32_t)
-       },
-       [IDT_BYTES] = {
-               .storage_type = OSL_MAPPED_STORAGE,
-               .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
-               .compare_function = size_compare,
-               .name = "num_bytes",
-               .data_size = sizeof(uint64_t)
-       },
-       [IDT_FILES] = {
-               .storage_type = OSL_MAPPED_STORAGE,
-               .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
-               .compare_function = size_compare,
-               .name = "num_filess",
-               .data_size = sizeof(uint64_t)
-       },
-       [IDT_TABLE] = {
-               .storage_type = OSL_NO_STORAGE,
-               .storage_flags = OSL_FIXED_SIZE | OSL_UNIQUE,
-               .name = "user_table",
-               .data_size = sizeof(void *)
-       }
-};
-
-static struct osl_table_description id_table_desc = {
-       .name = "id_table",
-       .num_columns = NUM_IDT_COLUMNS,
-       .flags = 0,
-       .column_descriptions = id_table_cols,
-       .dir = "/tmp/adu"
-};
-
-/** The columns of the id table. */
-enum user_table_columns {
-       /** The numer of the directory. */
-       UT_DIR_NUM,
-       /** The number of bytes of all regular files in this dir owned by this id. */
-       UT_BYTES,
-       /** The number of files in this dir owned by this id. */
-       UT_FILES,
-       /** Number of columns in this table. */
-       NUM_UT_COLUMNS
-};
-
-static struct osl_column_description user_table_cols[] = {
-       [UT_DIR_NUM] = {
-               .storage_type = OSL_MAPPED_STORAGE,
-               .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
-               .name = "dir_num",
-               .compare_function = uint32_compare,
-               .data_size = sizeof(uint32_t)
-       },
-       [IDT_BYTES] = {
-               .storage_type = OSL_MAPPED_STORAGE,
-               .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
-               .compare_function = size_compare,
-               .name = "num_bytes",
-               .data_size = sizeof(uint64_t)
-       },
-       [IDT_FILES] = {
-               .storage_type = OSL_MAPPED_STORAGE,
-               .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
-               .compare_function = size_compare,
-               .name = "num_files",
-               .data_size = sizeof(uint64_t)
-       },
-};
-
-static struct osl_table_description user_table_desc = {
-       .num_columns = NUM_UT_COLUMNS,
-       .flags = 0,
-       .column_descriptions = user_table_cols,
-       .dir = "/tmp/adu"
-};
-static struct osl_table *dir_table;
-static struct osl_table *id_table;
-
-static int create_tables(void)
+/**
+ * The log function.
+ *
+ * \param ll Loglevel.
+ * \param fmt Usual format string.
+ *
+ * All XXX_LOG() macros use this function.
+ */
+__printf_2_3 void __log(int ll, const char* fmt,...)
 {
-       int ret = osl_create_table(&dir_table_desc);
-       if (ret < 0)
-               return ret;
-       ret = osl_create_table(&id_table_desc);
-       if (ret < 0)
-               return ret;
-       return 1;
-}
+       va_list argp;
+       FILE *outfd;
+       struct tm *tm;
+       time_t t1;
+       char str[255] = "";
 
-int add_directory(char *dirname, uint32_t dir_num, uint64_t *dir_size,
-               uint64_t *dir_files)
-{
-       struct osl_object dir_objects[NUM_DT_COLUMNS];
-
-       INFO_LOG("adding #%u: %s\n", dir_num, dirname);
-       dir_objects[DT_NAME].data = dirname;
-       dir_objects[DT_NAME].size = strlen(dirname) + 1;
-       dir_objects[DT_NUM].data = &dir_num;
-       dir_objects[DT_NUM].size = sizeof(dir_num);
-       dir_objects[DT_BYTES].data = dir_size;
-       dir_objects[DT_BYTES].size = sizeof(*dir_size);
-       dir_objects[DT_FILES].data = dir_files;
-       dir_objects[DT_FILES].size = sizeof(*dir_files);
-
-       return osl_add_row(dir_table, dir_objects);
+       if (ll < conf.loglevel_arg)
+               return;
+       outfd = stderr;
+       time(&t1);
+       tm = localtime(&t1);
+       strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
+       fprintf(outfd, "%s ", str);
+       va_start(argp, fmt);
+       vfprintf(outfd, fmt, argp);
+       va_end(argp);
 }
 
-int create_and_open_user_table(uint32_t uid, struct osl_table **t)
+static void close_dir_table(void)
 {
        int ret;
-       struct osl_table_description *desc = para_malloc(sizeof(*desc));
-
-       desc->num_columns = NUM_UT_COLUMNS;
-       desc->flags = 0;
-       desc->column_descriptions = user_table_cols;
-       desc->dir = para_strdup("/tmp/adu");
-       desc->name = make_message("%u", uid);
-       INFO_LOG("................................. %u\n", uid);
-//     user_table_desc.name = make_message("%u", uid);
-       ret = osl_create_table(desc);
-       if (ret < 0)
-               return ret;
-       return osl_open_table(desc, t);
-}
-
-static int insert_id_row(uint32_t uid, struct osl_table *t, struct osl_row **row)
-{
-       struct osl_object objects[NUM_IDT_COLUMNS];
-       uint64_t num = 0;
-
-       struct osl_table **table_ptr = para_malloc(sizeof(*table_ptr));
-       *table_ptr = t;
-
-       INFO_LOG("§§§§§§§§§§§§§§§§§§§§§ uid: %d, t: %p\n", uid, t);
-       objects[IDT_UID].data = &uid;
-       objects[IDT_UID].size = sizeof(uid);
-       objects[IDT_BYTES].data = &num;
-       objects[IDT_BYTES].size = sizeof(num);
-       objects[IDT_FILES].data = &num;
-       objects[IDT_FILES].size = sizeof(num);
-       objects[IDT_TABLE].data = table_ptr;
-       objects[IDT_TABLE].size = sizeof(*table_ptr);
-       return osl_add_and_get_row(id_table, objects, row);
-}
 
-static int get_user_table(struct osl_row *row, struct osl_table **t)
-{
-       struct osl_object obj;
-
-       int ret = osl_get_object(id_table, row, IDT_TABLE, &obj);
-       if (ret < 0)
-               return ret;
-       *t = *(struct osl_table **)obj.data;
-       INFO_LOG("^^^^^^^^^^^^^^^^^^ t: %p\n", *t);
-       return 1;
-}
-
-static int add_id_bytes(struct osl_row *row, uint64_t *add)
-{
-       uint64_t num;
-       struct osl_object obj1, obj2 = {.data = &num, .size = sizeof(num)};
-
-       /* update number of bytes */
-       int ret = osl_get_object(id_table, row, IDT_BYTES, &obj1);
-       if (ret < 0)
-               return ret;
-       num = *(uint64_t *)obj1.data + *add;
-       ret = osl_update_object(id_table, row, IDT_BYTES, &obj2);
-       if (ret < 0)
-               return ret;
-       /* increment number of files */
-       ret = osl_get_object(id_table, row, IDT_FILES, &obj1);
+       if (!dir_table)
+               return;
+       NOTICE_LOG("closing dir table\n");
+       ret = osl(osl_close_table(dir_table, OSL_MARK_CLEAN));
        if (ret < 0)
-               return ret;
-       num = *(uint64_t *)obj1.data + 1;
-       return osl_update_object(id_table, row, IDT_FILES, &obj2);
+               ERROR_LOG("failed to close dir table: %s\n", adu_strerror(-ret));
+       free((char *)dir_table_desc.dir);
+       dir_table = NULL;
 }
 
-static int update_user_row(struct osl_table *t, uint32_t dir_num,
-               uint64_t *add)
+static void close_all_tables(void)
 {
-       struct osl_row *row;
-       struct osl_object obj = {.data = &dir_num, .size = sizeof(dir_num)};
-
-       int ret = osl_get_row(t, UT_DIR_NUM, &obj, &row);
-
-       if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND)
-               return ret;
-       if (ret < 0) { /* this is the first file we add */
-               struct osl_object objects[NUM_UT_COLUMNS];
-               uint64_t num_files = 1;
-
-               objects[UT_DIR_NUM].data = &dir_num;
-               objects[UT_DIR_NUM].size = sizeof(dir_num);
-               objects[UT_BYTES].data = add;
-               objects[UT_BYTES].size = sizeof(*add);
-               objects[UT_FILES].data = &num_files;
-               objects[UT_FILES].size = sizeof(num_files);
-               INFO_LOG("######################### ret: %d\n", ret);
-               ret = osl_add_row(t, objects);
-               INFO_LOG("######################### ret: %d\n", ret);
-               return ret;
-       } else { /* add size and increment file count */
-               uint64_t num;
-               struct osl_object obj1, obj2 = {.data = &num, .size = sizeof(num)};
-
-               ret = osl_get_object(t, row, UT_BYTES, &obj1);
-               if (ret < 0)
-                       return ret;
-               num = *(uint64_t *)obj1.data + *add;
-               ret = osl_update_object(t, row, UT_BYTES, &obj2);
-               if (ret < 0)
-                       return ret;
-               ret = osl_get_object(t, row, UT_FILES, &obj1);
-               if (ret < 0)
-                       return ret;
-               num = *(uint64_t *)obj1.data + 1;
-               return osl_update_object(t, row, UT_FILES, &obj2);
-       }
+       close_dir_table();
+       close_user_tables();
 }
 
-static uint32_t dir_num;
-
-int scan_dir(char *dirname)
+static void signal_handler(int s)
 {
-       DIR *dir;
-       struct dirent *entry;
-       int ret, cwd_fd, ret2;
-       uint64_t dir_size = 0, dir_files = 0;
-       struct osl_object obj;
-
-       INFO_LOG("----------------- %s\n", dirname);
-       ret = para_opendir(dirname, &dir, &cwd_fd);
-       if (ret < 0) {
-               if (ret != -ERRNO_TO_ERROR(EACCES))
-                       return ret;
-               WARNING_LOG("permission denied for %s\n", dirname);
-               return 1;
-       }
-       while ((entry = readdir(dir))) {
-               mode_t m;
-               char *tmp;
-               struct stat s;
-               uint32_t uid;
-               uint64_t size;
-               struct osl_row *id_row;
-               struct osl_table *user_table;
-
-               if (!strcmp(entry->d_name, "."))
-                       continue;
-               if (!strcmp(entry->d_name, ".."))
-                       continue;
-               if (lstat(entry->d_name, &s) == -1)
-                       continue;
-               m = s.st_mode;
-               if (!S_ISREG(m) && !S_ISDIR(m))
-                       continue;
-               tmp = make_message("%s/%s", dirname, entry->d_name);
-               if (S_ISDIR(m)) {
-                       ret = scan_dir(tmp);
-                       free(tmp);
-                       if (ret < 0)
-                               goto out;
-                       continue;
-               }
-               /* regular file */
-               size = s.st_size;
-               dir_size += size;
-               dir_files++;
-               uid = s.st_uid;
-               INFO_LOG("++++++++++++++++++++++++++ %s, uid: %u\n", entry->d_name, uid);
-               obj.data = &uid;
-               obj.size = sizeof(uid);
-               ret = osl_get_row(id_table, IDT_UID, &obj, &id_row);
-               if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND)
-                       goto out;
-               if (ret < 0) {
-                       ret = create_and_open_user_table(uid, &user_table);
-                       if (ret < 0)
-                               goto out;
-                       ret = insert_id_row(uid, user_table, &id_row);
-                       if (ret < 0)
-                               goto out;
-               } else {
-                       ret = get_user_table(id_row, &user_table);
-                       if (ret < 0)
-                               goto out;
-               }
-               ret = add_id_bytes(id_row, &size);
-               if (ret < 0)
-                       goto out;
-               INFO_LOG("user_table: %p\n", user_table);
-               ret = update_user_row(user_table, dir_num, &size);
-               INFO_LOG("update_user  ret: %d\n", ret);
-               if (ret < 0)
-                       goto out;
-       }
-       ret = add_directory(dirname, dir_num++, &dir_size, &dir_files);
-out:
-       closedir(dir);
-       ret2 = para_fchdir(cwd_fd);
-       if (ret2 < 0 && ret >= 0)
-               ret = ret2;
-       close(cwd_fd);
-       return ret;
+       signum = s;
 }
 
-static int get_dir_name(struct osl_row *row, char **name)
-{
-       struct osl_object obj;
-       int ret = osl_get_object(dir_table, row, DT_NAME, &obj);
-
-       if (ret < 0)
-               return ret;
-       *name = obj.data;
-       return 1;
-}
-
-static int print_dirname_and_size(struct osl_row *row, void *data)
+/**
+ * Check whether to terminate adu.
+ *
+ * Check whether a signal was caught that should terminate the
+ * adu process. If yes, close all osl tables and exit gracefully.
+ */
+void check_signals(void)
 {
-       unsigned *count = data;
-       struct osl_object obj;
-       char *name;
-       int ret;
-
-       if ((*count)++ > 100)
-               return -E_LOOP_COMPLETE;
-       ret = get_dir_name(row, &name);
-       if (ret < 0)
-               return ret;
-       ret = osl_get_object(dir_table, row, DT_BYTES, &obj);
-       if (ret < 0)
-               return ret;
-       printf("%s\t%llu\n", name, *(long long unsigned *)obj.data);
-       return 1;
+       if (likely(!signum))
+               return;
+       EMERG_LOG("caught signal %d\n", signum);
+       close_all_tables();
+       exit(EXIT_FAILURE);
 }
 
-static int print_dirname_and_file_count(struct osl_row *row, void *data)
+static int init_signals(void)
 {
-       unsigned *count = data;
-       struct osl_object obj;
-       char *name;
-       int ret;
-
-       if ((*count)++ > 100)
-               return -E_LOOP_COMPLETE;
-       ret = get_dir_name(row, &name);
-       if (ret < 0)
-               return ret;
-       ret = osl_get_object(dir_table, row, DT_FILES, &obj);
-       if (ret < 0)
-               return ret;
-       printf("%s\t%llu\n", name, *(long long unsigned *)obj.data);
+       if (signal(SIGINT, &signal_handler) == SIG_ERR)
+               return -E_SIGNAL_SIG_ERR;
+       if (signal(SIGTERM, &signal_handler) == SIG_ERR)
+               return -E_SIGNAL_SIG_ERR;
+       if (signal(SIGPIPE, &signal_handler) == SIG_ERR)
+               return -E_SIGNAL_SIG_ERR;
        return 1;
 }
 
-static int print_id_stats(struct osl_row *row, __a_unused void *data)
+/**
+ * Open the directory table.
+ *
+ * \param create If non-zero, create the table first.
+ *
+ * \return Standard.
+ */
+int open_dir_table(int create)
 {
-       struct osl_object obj;
-       uint32_t uid;
-       uint64_t bytes, files;
-       int ret = osl_get_object(id_table, row, IDT_UID, &obj);
 
-       if (ret < 0)
-               return ret;
-       uid = *(uint32_t *)obj.data;
-       ret = osl_get_object(id_table, row, IDT_BYTES, &obj);
-       if (ret < 0)
-               return ret;
-       bytes = *(uint64_t *)obj.data;
-       ret = osl_get_object(id_table, row, IDT_FILES, &obj);
-       if (ret < 0)
-               return ret;
-       files = *(uint64_t *)obj.data;
+       if (dir_table)
+               return 1;
+       dir_table_desc.dir = adu_strdup(conf.database_dir_arg);
 
-       printf("%u\t%llu\t%llu\n", (unsigned)uid, (long long unsigned)files,
-               (long long unsigned)bytes);
-       return 1;
+       if (create) {
+               NOTICE_LOG("creating dir table\n");
+               int ret = osl(osl_create_table(&dir_table_desc));
+               if (ret < 0) {
+                       free((char *)dir_table_desc.dir);
+                       return ret;
+               }
+       }
+       INFO_LOG("opening dir table\n");
+       return osl(osl_open_table(&dir_table_desc, &dir_table));
 }
 
-struct id_dir_stat_info {
-       unsigned count;
-       struct osl_table *user_table;
-};
-
-static int print_big_dir(struct osl_row *row, void *data)
+static int check_args(void)
 {
-       struct id_dir_stat_info *info = data;
-       info->count++;
-       int ret;
-       struct osl_row *dir_row;
-       char *dirname;
-       uint64_t bytes;
-       struct osl_object obj;
-
-       if (info->count > 10)
-               return -E_LOOP_COMPLETE;
-       ret = osl_get_object(info->user_table, row, UT_BYTES, &obj);
-       if (ret < 0)
-               return ret;
-       bytes = *(uint64_t *)obj.data;
-       ret = osl_get_object(info->user_table, row, UT_DIR_NUM, &obj);
-       if (ret < 0)
-               return ret;
-       ret = osl_get_row(dir_table, DT_NUM, &obj, &dir_row);
-       if (ret < 0)
-               return ret;
-       ret = osl_get_object(dir_table, dir_row, DT_NAME, &obj);
-       if (ret < 0)
-               return ret;
-       dirname = obj.data;
-       printf("%s: %llu\n", dirname, (long long unsigned)bytes);
+       if (conf.create_given && !conf.base_dir_given)
+               return -E_SYNTAX;
+
+       /* remove trailing slashes from base-dir arg */
+       if (conf.base_dir_given) {
+               size_t len = strlen(conf.base_dir_arg);
+               for (;;) {
+                       if (!len) /* empty string */
+                               return -ERRNO_TO_ERROR(EINVAL);
+                       if (!--len) /* length 1 is always OK */
+                               break;
+                       if (conf.base_dir_arg[len] != '/')
+                               break; /* no trailing slash, also OK */
+                       conf.base_dir_arg[len] = '\0';
+               }
+       }
        return 1;
 }
 
-static int print_id_dir_stats(struct osl_row *row, __a_unused void *data)
+static int print_complete_help_and_die(void)
 {
-       struct osl_object obj;
-       uint32_t uid;
-       int ret = osl_get_object(id_table, row, IDT_UID, &obj);
-       struct id_dir_stat_info info = {.count = 0};
-
-       if (ret < 0)
-               return ret;
-       uid = *(uint32_t *)obj.data;
-
-       ret = osl_get_object(id_table, row, IDT_TABLE, &obj);
-       if (ret < 0)
-               return ret;
-       info.user_table = *(struct osl_table **)obj.data;
-
-       printf("************************* Big dirs owned by uid %u\n", (unsigned) uid);
-       osl_rbtree_loop_reverse(info.user_table, IDT_BYTES, &info, print_big_dir);
-       return 1;
+       const char **line;
+
+       printf("%s-%s\n", CMDLINE_PARSER_PACKAGE, CMDLINE_PARSER_VERSION);
+       printf("%s\n\n", gengetopt_args_info_purpose);
+       printf("%s\n\n", gengetopt_args_info_usage);
+
+       if (conf.help_given)
+               line = gengetopt_args_info_help;
+       else
+               line = gengetopt_args_info_detailed_help;
+       for (; *line; line++)
+               printf("%s\n", *line);
+
+       if (conf.help_given)
+               line = select_args_info_help;
+       else
+               line  = select_args_info_detailed_help;
+       printf("Select options:\n");
+       for (; *line; line++)
+               printf("%s\n", *line);
+
+       printf("Interactive commands:\n");
+       print_interactive_help();
+       cmdline_parser_free(&conf);
+       select_cmdline_parser_free(&select_conf);
+       exit(EXIT_FAILURE);
 }
 
-static int print_statistics(void)
+/**
+ * The main function of adu.
+ *
+ * \param argc Usual argument count.
+ * \param argv Usual argument vector.
+ *
+ * Check command line options, init the signal handlers and
+ * call the main function of the selected mode.
+ *
+ * \return \p EXIT_SUCCESS on success, \p EXIT_FAILURE otherwise.
+ */
+int main(int argc, char **argv)
 {
-       unsigned count = 0;
        int ret;
+       struct cmdline_parser_params params = {
+               .override = 1,
+               .initialize = 1,
+               .check_required = 0,
+               .check_ambiguity = 0,
+               .print_errors = 0
+       };
+       select_cmdline_parser_init(&select_conf);
+       cmdline_parser_init(&conf);
+       /* ignore errors and print complete help if --help was given */
+       cmdline_parser_ext(argc, argv, &conf, &params);
+       if (conf.help_given || conf.detailed_help_given)
+               print_complete_help_and_die();
+       cmdline_parser_free(&conf);
+       params.check_required = 1;
+       params.check_ambiguity = 1;
+       params.print_errors = 1;
+       ret = cmdline_parser_ext(argc, argv, &conf, &params);
+       if (ret)
+               exit(EXIT_FAILURE);
 
-       printf("************************* Biggest dirs\n");
-       ret = osl_rbtree_loop_reverse(dir_table, DT_BYTES, &count, print_dirname_and_size);
-       if (ret < 0 && ret != -E_LOOP_COMPLETE)
-               return ret;
-       count = 0;
-       printf("************************* dirs containing many files\n");
-       ret = osl_rbtree_loop_reverse(dir_table, DT_FILES, &count, print_dirname_and_file_count);
-       if (ret < 0 && ret != -E_LOOP_COMPLETE)
-               return ret;
-
-       printf("************************* dirs stats by owner\n");
-       ret = osl_rbtree_loop(id_table, IDT_BYTES, NULL, print_id_stats);
-       if (ret < 0)
-               return ret;
-
-       return osl_rbtree_loop(id_table, IDT_BYTES, NULL, print_id_dir_stats);
-}
-
-
-int main(int argc, char **argv)
-{
-       int ret = create_tables();
-       if (ret < 0)
-               goto out;
-       ret = osl_open_table(&dir_table_desc, &dir_table);
+       ret = check_args();
        if (ret < 0)
                goto out;
-       ret = osl_open_table(&id_table_desc, &id_table);
+       ret = init_signals();
        if (ret < 0)
                goto out;
        ret = -E_SYNTAX;
-       if (argc != 2)
-               goto out;
-       ret = scan_dir(argv[1]);
+       if (conf.select_given)
+               ret = com_select();
+       else if (conf.create_given)
+               ret = com_create();
+       else
+               ret = com_interactive();
        if (ret < 0)
                goto out;
-       print_statistics();
 out:
+       close_all_tables();
        if (ret < 0) {
-               ERROR_LOG("%s\n", error_txt(-ret));
+               ERROR_LOG("%s\n", adu_strerror(-ret));
                return -EXIT_FAILURE;
        }
+       cmdline_parser_free(&conf);
+       select_cmdline_parser_free(&select_conf);
        return EXIT_SUCCESS;
 }
-