Move the code for the select command to its own file.
authorAndre Noll <maan@systemlinux.org>
Sun, 1 Jun 2008 15:50:41 +0000 (17:50 +0200)
committerAndre Noll <maan@systemlinux.org>
Sun, 1 Jun 2008 15:50:41 +0000 (17:50 +0200)
Makefile
adu.c
adu.h
select.c [new file with mode: 0644]

index ef94fcc..68e6443 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-objects := adu.o string.o cmdline.o fd.o
+objects := adu.o string.o cmdline.o fd.o select.o
 all: adu
 
 DEBUG_CPPFLAGS += -Wno-sign-compare -g -Wunused -Wundef -W
diff --git a/adu.c b/adu.c
index c3a278e..9a0e513 100644 (file)
--- a/adu.c
+++ b/adu.c
 DEFINE_ERRLIST;
 int osl_errno;
 
-/** Command line and config file options. */
-static struct gengetopt_args_info conf;
-
-enum uid_info_flags {
-       /** whether this slot of the hash table is used. */
-       UI_FL_SLOT_USED = 1,
-       /** whether this uid should be taken into account. */
-       UI_FL_ADMISSIBLE = 2,
-};
-
-struct user_info {
-       uint32_t uid;
-       uint32_t flags;
-       char *pw_name;
-       struct osl_table *table;
-       uint64_t files;
-       uint64_t bytes;
-       uint64_t dirs;
-       struct osl_table_description *desc;
-};
+/** In case a signal is received, its number is stored here. */
+static int signum;
 
-/** The decimal representation of an uint64_t never exceeds that size. */
-#define FORMATED_VALUE_SIZE 25
+/** Command line and config file options. */
+struct gengetopt_args_info conf;
 
-#define FOR_EACH_USER(ui) for (ui = uid_hash_table; ui && ui < uid_hash_table \
-               + uid_hash_table_size; ui++)
+/** Global dir count. */
+uint64_t num_dirs = 0;
+/** Global files count. */
+uint64_t num_files = 0;
+/** Global bytes count. */
+uint64_t num_bytes = 0;
 
+/** The number of different uids found so far. */
+uint32_t num_uids = 0;
 
 /**
  * Contains info for each user that owns at least one regular file.
@@ -47,113 +35,20 @@ struct user_info {
  * option occupy a slot in this hash table. This allows to find out
  * quicky whether a uid is admissible. And yes, this has to be fast.
  */
-static struct user_info *uid_hash_table;
-
-/* these get filled in by the select command. */
-static char count_unit_buf[4] = "( )", size_unit_buf[4] = "( )";
-
-static inline int ui_used(struct user_info *ui)
-{
-       return ui->flags & UI_FL_SLOT_USED;
-}
-
-static inline int ui_admissible(struct user_info *ui)
-{
-       return ui->flags & UI_FL_ADMISSIBLE;
-}
-
-struct uid_range {
-       uint32_t low;
-       uint32_t high;
-};
-
-static struct uid_range *admissible_uids;
-
-static inline int check_uid_arg(const char *arg, uint32_t *uid)
-{
-       const uint32_t max = ~0U;
-       /*
-        * we need an 64-bit int for string -> uid conversion because strtoll()
-        * returns a signed value.
-        */
-       int64_t val;
-       int ret = atoi64(arg, &val);
-
-       if (ret < 0)
-               return ret;
-       if (val < 0 || val > max)
-               return -ERRNO_TO_ERROR(EINVAL);
-       *uid = val;
-       return 1;
-}
-
-static int parse_uid_range(const char *orig_arg, struct uid_range *ur)
-{
-       int ret;
-       char *arg = adu_strdup(orig_arg), *p = strchr(arg, '-');
-
-       if (!p || p == arg) { /* -42 or 42 */
-               ret = check_uid_arg(p? p + 1 : arg, &ur->high);
-               if (ret < 0)
-                       goto out;
-               ur->low = p? 0 : ur->high;
-               ret = 1;
-               goto out;
-       }
-       /* 42- or 42-4711 */
-       *p = '\0';
-       p++;
-       ret = check_uid_arg(arg, &ur->low);
-       if (ret < 0)
-               goto out;
-       ur->high = ~0U;
-       if (*p) { /* 42-4711 */
-               ret = check_uid_arg(p, &ur->high);
-               if (ret < 0)
-                       goto out;
-       }
-       if (ur->low > ur->high)
-               ret = -ERRNO_TO_ERROR(EINVAL);
-out:
-       if (ret < 0)
-               ERROR_LOG("bad uid option: %s\n", orig_arg);
-       else
-               INFO_LOG("admissible uid range: %u - %u\n", ur->low,
-                       ur->high);
-       free(arg);
-       return ret;
-}
+struct user_info *uid_hash_table = NULL;
 
-/** 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 table containing the directory names and statistics.
+ */
+struct osl_table *dir_table = NULL;
 
 /**
- * The log function.
- *
- * \param ll Loglevel.
- * \param fml Usual format string.
- *
- * All XXX_LOG() macros use this function.
+ * The array of all uid ranges that were given at the command line.
  */
-__printf_2_3 void __log(int ll, const char* fmt,...)
-{
-       va_list argp;
-       FILE *outfd;
-       struct tm *tm;
-       time_t t1;
-       char str[255] = "";
+struct uid_range *admissible_uids;
 
-       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);
-}
+/** 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)))
 
 /**
  * Compare the size of two directories
@@ -200,22 +95,6 @@ static int uint64_compare(const struct osl_object *obj1,
        return 0;
 }
 
-/** 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 the parent directory. */
-       DT_PARENT_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
-};
-
 static struct osl_column_description dir_table_cols[] = {
        [DT_NAME] = {
                .storage_type = OSL_MAPPED_STORAGE,
@@ -259,18 +138,6 @@ static struct osl_table_description dir_table_desc = {
        .column_descriptions = dir_table_cols,
 };
 
-/** 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,
@@ -295,7 +162,88 @@ static struct osl_column_description user_table_cols[] = {
        },
 };
 
-static struct osl_table *dir_table;
+static int check_uid_arg(const char *arg, uint32_t *uid)
+{
+       const uint32_t max = ~0U;
+       /*
+        * we need an 64-bit int for string -> uid conversion because strtoll()
+        * returns a signed value.
+        */
+       int64_t val;
+       int ret = atoi64(arg, &val);
+
+       if (ret < 0)
+               return ret;
+       if (val < 0 || val > max)
+               return -ERRNO_TO_ERROR(EINVAL);
+       *uid = val;
+       return 1;
+}
+
+static int parse_uid_range(const char *orig_arg, struct uid_range *ur)
+{
+       int ret;
+       char *arg = adu_strdup(orig_arg), *p = strchr(arg, '-');
+
+       if (!p || p == arg) { /* -42 or 42 */
+               ret = check_uid_arg(p? p + 1 : arg, &ur->high);
+               if (ret < 0)
+                       goto out;
+               ur->low = p? 0 : ur->high;
+               ret = 1;
+               goto out;
+       }
+       /* 42- or 42-4711 */
+       *p = '\0';
+       p++;
+       ret = check_uid_arg(arg, &ur->low);
+       if (ret < 0)
+               goto out;
+       ur->high = ~0U;
+       if (*p) { /* 42-4711 */
+               ret = check_uid_arg(p, &ur->high);
+               if (ret < 0)
+                       goto out;
+       }
+       if (ur->low > ur->high)
+               ret = -ERRNO_TO_ERROR(EINVAL);
+out:
+       if (ret < 0)
+               ERROR_LOG("bad uid option: %s\n", orig_arg);
+       else
+               INFO_LOG("admissible uid range: %u - %u\n", ur->low,
+                       ur->high);
+       free(arg);
+       return ret;
+}
+
+/**
+ * The log function.
+ *
+ * \param ll Loglevel.
+ * \param fml Usual format string.
+ *
+ * All XXX_LOG() macros use this function.
+ */
+__printf_2_3 void __log(int ll, const char* fmt,...)
+{
+       va_list argp;
+       FILE *outfd;
+       struct tm *tm;
+       time_t t1;
+       char str[255] = "";
+
+       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);
+}
 
 static int add_directory(char *dirname, uint64_t *dir_num, uint64_t *parent_dir_num,
                uint64_t *dir_size, uint64_t *dir_files)
@@ -316,8 +264,6 @@ static int add_directory(char *dirname, uint64_t *dir_num, uint64_t *parent_dir_
        return osl(osl_add_row(dir_table, dir_objects));
 }
 
-static uint32_t num_uids;
-
 static int open_user_table(struct user_info *ui, int create)
 {
        int ret;
@@ -359,11 +305,11 @@ err:
 }
 
 #define uid_hash_bits 8
-static uint32_t uid_hash_table_size = 1 << uid_hash_bits;
+uint32_t uid_hash_table_size = 1 << uid_hash_bits;
 #define PRIME1 0x811c9dc5
 #define PRIME2 0x01000193
 
-static void create_hash_table(void)
+void create_hash_table(void)
 {
        uid_hash_table = adu_calloc(uid_hash_table_size
                * sizeof(struct user_info));
@@ -430,21 +376,19 @@ static void close_user_tables(void)
                close_user_table(ui);
 }
 
-static void close_all_tables(void)
+void close_all_tables(void)
 {
        close_dir_table();
        close_user_tables();
        free_hash_table();
 }
 
-static int signum;
-
 static void signal_handler(int s)
 {
        signum = s;
 }
 
-static void check_signals(void)
+void check_signals(void)
 {
        if (likely(!signum))
                return;
@@ -484,11 +428,6 @@ static uint32_t double_hash(uint32_t uid, uint32_t probe_num)
                % uid_hash_table_size;
 }
 
-enum search_uid_flags {
-       OPEN_USER_TABLE = 1,
-       CREATE_USER_TABLE = 2,
-};
-
 static int uid_is_admissible(uint32_t uid)
 {
        int i;
@@ -505,7 +444,7 @@ static int uid_is_admissible(uint32_t uid)
        return i;
 }
 
-static int search_uid(uint32_t uid, enum search_uid_flags flags,
+int search_uid(uint32_t uid, enum search_uid_flags flags,
                struct user_info **ui_ptr)
 {
        uint32_t p;
@@ -582,10 +521,6 @@ static int update_user_row(struct osl_table *t, uint64_t dir_num,
        }
 }
 
-static uint64_t num_dirs;
-static uint64_t num_files;
-static uint64_t num_bytes;
-
 /* id of the device containing the base dir. */
 static dev_t device_id;
 
@@ -660,441 +595,7 @@ out:
        return ret;
 }
 
-static int get_dir_name_by_number(uint64_t *dirnum, char **name)
-{
-       char *result = NULL, *tmp;
-       struct osl_row *row;
-       uint64_t val = *dirnum;
-       struct osl_object obj = {.data = &val, .size = sizeof(val)};
-       int ret;
-
-again:
-       ret = osl(osl_get_row(dir_table, DT_NUM, &obj, &row));
-       if (ret < 0)
-               goto out;
-       ret = osl(osl_get_object(dir_table, row, DT_NAME, &obj));
-       if (ret < 0)
-               goto out;
-       if (result) {
-               tmp = make_message("%s/%s", (char *)obj.data, result);
-               free(result);
-               result = tmp;
-       } else
-               result = adu_strdup((char *)obj.data);
-       ret = osl(osl_get_object(dir_table, row, DT_PARENT_NUM, &obj));
-       if (ret < 0)
-               goto out;
-       val = *(uint64_t *)obj.data;
-       if (val)
-               goto again;
-out:
-       if (ret < 0) {
-               free(result);
-               *name = NULL;
-       } else
-               *name = result;
-       return ret;
-}
-
-static int get_dir_name_of_row(struct osl_row *dir_table_row, char **name)
-{
-       struct osl_object obj;
-       int ret;
-       char *this_dir, *prefix = NULL;
-
-       *name = NULL;
-       ret = osl(osl_get_object(dir_table, dir_table_row, DT_NAME, &obj));
-       if (ret < 0)
-               return ret;
-       this_dir = adu_strdup((char *)obj.data);
-       ret = osl(osl_get_object(dir_table, dir_table_row, DT_PARENT_NUM, &obj));
-       if (ret < 0)
-               goto out;
-       if (!*(uint64_t *)obj.data) {
-               *name = this_dir;
-               return 1;
-       }
-       ret = get_dir_name_by_number((uint64_t *)obj.data, &prefix);
-       if (ret < 0)
-               goto out;
-       *name = make_message("%s/%s", prefix, this_dir);
-       free(prefix);
-       ret = 1;
-out:
-       free(this_dir);
-       return ret;
-}
-
-const uint64_t size_unit_divisors[] = {
-       [size_unit_arg_b] = 1ULL,
-       [size_unit_arg_k] = 1024ULL,
-       [size_unit_arg_m] = 1024ULL * 1024ULL,
-       [size_unit_arg_g] = 1024ULL * 1024ULL * 1024ULL,
-       [size_unit_arg_t] = 1024ULL * 1024ULL * 1024ULL * 1024ULL,
-};
-
-const uint64_t count_unit_divisors[] = {
-
-       [count_unit_arg_n] = 1ULL,
-       [count_unit_arg_k] = 1000ULL,
-       [count_unit_arg_m] = 1000ULL * 1000ULL,
-       [count_unit_arg_g] = 1000ULL * 1000ULL * 1000ULL,
-       [count_unit_arg_t] = 1000ULL * 1000ULL * 1000ULL * 1000ULL,
-};
-
-const char size_unit_abbrevs[] = " BKMGT";
-const char count_unit_abbrevs[] = "  kmgt";
-
-static enum enum_size_unit format_size_value(enum enum_size_unit unit,
-               uint64_t value, int print_unit, char *result)
-{
-       enum enum_size_unit u = unit;
-       char unit_buf[2] = "\0\0";
-
-       if (unit == size_unit_arg_h) /* human readable */
-               for (u = size_unit_arg_b; u < size_unit_arg_t &&
-                               value > size_unit_divisors[u + 1]; u++)
-                       ; /* nothing */
-       if (print_unit)
-               unit_buf[0] = size_unit_abbrevs[u];
-       sprintf(result, "%llu%s",
-               (long long unsigned)value / size_unit_divisors[u], unit_buf);
-       return u;
-}
-
-static enum enum_count_unit format_count_value(enum enum_count_unit unit,
-               uint64_t value, int print_unit, char *result)
-{
-       enum enum_count_unit u = unit;
-       char unit_buf[2] = "\0\0";
-
-       if (unit == count_unit_arg_h) /* human readable */
-               for (u = count_unit_arg_n; u < count_unit_arg_t &&
-                               value > count_unit_divisors[u + 1]; u++)
-                       ; /* nothing */
-       if (print_unit)
-               unit_buf[0] = count_unit_abbrevs[u];
-       sprintf(result, "%llu%s",
-               (long long unsigned)value / count_unit_divisors[u], unit_buf);
-       return u;
-}
-
-enum global_stats_flags {
-       GSF_PRINT_DIRNAME = 1,
-       GSF_PRINT_BYTES = 2,
-       GSF_PRINT_FILES = 4,
-       GSF_COMPUTE_SUMMARY = 8,
-};
-
-struct global_stats_info {
-       uint32_t count;
-       int ret;
-       int osl_errno;
-       enum global_stats_flags flags;
-};
-
-static int global_stats_loop_function(struct osl_row *row, void *data)
-{
-       struct global_stats_info *gsi = data;
-       struct osl_object obj;
-       char *dirname, formated_value[FORMATED_VALUE_SIZE];
-       int ret, summary = gsi->flags & GSF_COMPUTE_SUMMARY;
-
-       check_signals();
-       if (!gsi->count && !summary) {
-               ret = -E_LOOP_COMPLETE;
-               goto err;
-       }
-       if (summary || (gsi->count && (gsi->flags & GSF_PRINT_FILES))) {
-               uint64_t files;
-               ret = osl(osl_get_object(dir_table, row, DT_FILES, &obj));
-               if (ret < 0)
-                       goto err;
-               files = *(uint64_t *)obj.data;
-               if (gsi->count && (gsi->flags & GSF_PRINT_FILES)) {
-                       format_count_value(conf.count_unit_arg, files,
-                               conf.count_unit_arg == count_unit_arg_h,
-                               formated_value);
-                       printf("\t%s%s", formated_value,
-                               (gsi->flags & (GSF_PRINT_BYTES | GSF_PRINT_DIRNAME))?
-                               "\t" : "\n");
-               }
-               if (summary)
-                       num_files += files;
-       }
-       if (summary || (gsi->count && (gsi->flags & GSF_PRINT_BYTES))) {
-               uint64_t bytes;
-               ret = osl(osl_get_object(dir_table, row, DT_BYTES, &obj));
-               if (ret < 0)
-                       goto err;
-               bytes = *(uint64_t *)obj.data;
-               if (gsi->count && (gsi->flags & GSF_PRINT_BYTES)) {
-                       format_size_value(conf.size_unit_arg, bytes,
-                               conf.size_unit_arg == size_unit_arg_h,
-                               formated_value);
-                       printf("%s%s%s",
-                               (gsi->flags & GSF_PRINT_FILES)? "" : "\t",
-                               formated_value,
-                               (gsi->flags & GSF_PRINT_DIRNAME)? "\t" : "\n"
-                       );
-               }
-               if (summary) {
-                       num_bytes += bytes;
-                       num_dirs++;
-               }
-       }
-       if (gsi->count && (gsi->flags & GSF_PRINT_DIRNAME)) {
-               ret = get_dir_name_of_row(row, &dirname);
-               if (ret < 0)
-                       goto err;
-               printf("%s%s\n",
-                       (gsi->flags & (GSF_PRINT_BYTES | GSF_PRINT_FILES))? "" : "\t",
-                       dirname);
-               free(dirname);
-       }
-       if (gsi->count > 0)
-               gsi->count--;
-       return 1;
-err:
-       gsi->ret = ret;
-       gsi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
-       return -1;
-}
-
-static void print_id_stats(void)
-{
-       struct user_info *ui;
-
-       printf("User summary "
-               "(pw_name/uid/dirs%s/files%s/size%s):\n",
-               count_unit_buf, count_unit_buf, size_unit_buf);
-       FOR_EACH_USER(ui) {
-               char formated_dir_count[FORMATED_VALUE_SIZE],
-                       formated_file_count[FORMATED_VALUE_SIZE],
-                       formated_bytes[FORMATED_VALUE_SIZE ];
-               if (!ui_used(ui) || !ui_admissible(ui))
-                       continue;
-               format_count_value(conf.count_unit_arg, ui->dirs,
-                       conf.count_unit_arg == count_unit_arg_h,
-                       formated_dir_count);
-               format_count_value(conf.count_unit_arg, ui->files,
-                       conf.count_unit_arg == count_unit_arg_h,
-                       formated_file_count);
-               format_size_value(conf.size_unit_arg, ui->bytes,
-                       conf.size_unit_arg == size_unit_arg_h,
-                       formated_bytes);
-               printf("\t%s\t%u\t%s\t%s\t%s\n",
-                       ui->pw_name? ui->pw_name : "?",
-                       (unsigned)ui->uid,
-                       formated_dir_count,
-                       formated_file_count,
-                       formated_bytes
-               );
-       }
-}
-
-enum user_stats_flags {
-       USF_PRINT_DIRNAME = 1,
-       USF_PRINT_BYTES = 2,
-       USF_PRINT_FILES = 4,
-       USF_COMPUTE_SUMMARY = 8,
-};
-
-struct user_stats_info {
-       uint32_t count;
-       enum user_stats_flags flags;
-       int ret;
-       int osl_errno;
-       struct user_info *ui;
-};
-
-static int user_stats_loop_function(struct osl_row *row, void *data)
-{
-       struct user_stats_info *usi = data;
-       struct osl_object obj;
-       int ret, summary = usi->flags & GSF_COMPUTE_SUMMARY;
-       char formated_value[FORMATED_VALUE_SIZE];
-
-       check_signals();
-       if (!usi->count && !summary) {
-               ret = -E_LOOP_COMPLETE;
-               goto err;
-       }
-       if (summary || (usi->count && (usi->flags & USF_PRINT_FILES))) {
-               uint64_t files;
-               ret = osl(osl_get_object(usi->ui->table, row, UT_FILES, &obj));
-               if (ret < 0)
-                       goto err;
-               files = *(uint64_t *)obj.data;
-               if (usi->count && (usi->flags & USF_PRINT_FILES)) {
-                       format_count_value(conf.count_unit_arg, files,
-                               conf.count_unit_arg == count_unit_arg_h,
-                               formated_value);
-                       printf("\t%s%s", formated_value,
-                               (usi->flags & (USF_PRINT_BYTES | USF_PRINT_DIRNAME))?
-                                       "\t" : "\n"
-                       );
-               }
-               if (summary)
-                       usi->ui->files += files;
-       }
-       if (summary || (usi->count && (usi->flags & USF_PRINT_BYTES))) {
-               uint64_t bytes;
-               ret = osl(osl_get_object(usi->ui->table, row, UT_BYTES, &obj));
-               if (ret < 0)
-                       goto err;
-               bytes = *(uint64_t *)obj.data;
-               if (usi->count && (usi->flags & USF_PRINT_BYTES)) {
-                       format_size_value(conf.size_unit_arg, bytes,
-                               conf.size_unit_arg == size_unit_arg_h,
-                               formated_value);
-                       printf("%s%s%s",
-                               (usi->flags & USF_PRINT_FILES)? "" : "\t",
-                               formated_value,
-                               usi->flags & USF_PRINT_DIRNAME?  "\t" : "\n"
-                       );
-               }
-               if (summary) {
-                       usi->ui->bytes += bytes;
-                       usi->ui->dirs++;
-               }
-
-       }
-       if (usi->count && (usi->flags & USF_PRINT_DIRNAME)) {
-               char *dirname;
-               ret = osl(osl_get_object(usi->ui->table, row, UT_DIR_NUM, &obj));
-               if (ret < 0)
-                       goto err;
-               ret = get_dir_name_by_number((uint64_t *)obj.data, &dirname);
-               if (ret < 0)
-                       goto err;
-               printf("%s%s\n",
-                       (usi->flags & (USF_PRINT_BYTES | USF_PRINT_FILES))? "" : "\t",
-                       dirname);
-               free(dirname);
-       }
-       if (usi->count > 0)
-               usi->count--;
-       return 1;
-err:
-       usi->ret = ret;
-       usi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
-       return -1;
-}
-
-static int check_loop_return(int ret, int loop_ret, int loop_osl_errno)
-{
-       if (ret >= 0)
-               return ret;
-       assert(ret == -E_OSL);
-       if (osl_errno != E_OSL_LOOP)
-               /* error not caused by loop function returning negative. */
-               return ret;
-       assert(loop_ret < 0);
-       if (loop_ret == -E_LOOP_COMPLETE) /* no error */
-               return 1;
-       if (loop_ret == -E_OSL) { /* osl error in loop function */
-               assert(loop_osl_errno);
-               osl_errno = loop_osl_errno;
-       }
-       return loop_ret;
-}
-
-static int adu_loop_reverse(struct osl_table *t, unsigned col_num, void *private_data,
-               osl_rbtree_loop_func *func, int *loop_ret, int *loop_osl_errno)
-{
-       int ret = osl(osl_rbtree_loop_reverse(t, col_num, private_data, func));
-       return check_loop_return(ret, *loop_ret, *loop_osl_errno);
-}
-
-static int print_user_stats(void)
-{
-       struct user_info *ui;
-       int ret;
-
-       FOR_EACH_USER(ui) {
-               struct user_stats_info usi = {
-                       .count = conf.limit_arg,
-                       .ui = ui
-               };
-               if (!ui_used(ui) || !ui_admissible(ui))
-                       continue;
-               usi.flags = USF_PRINT_DIRNAME | USF_PRINT_BYTES | USF_COMPUTE_SUMMARY;
-               printf("%s (uid %u), by size%s:\n",
-                       ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
-                       size_unit_buf);
-               ret = adu_loop_reverse(ui->table, UT_BYTES, &usi, user_stats_loop_function,
-                       &usi.ret, &usi.osl_errno);
-               if (ret < 0)
-                       return ret;
-               printf("\n%s (uid %u), by file count%s:\n",
-                       ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
-                       count_unit_buf);
-               usi.count = conf.limit_arg,
-               usi.flags = USF_PRINT_DIRNAME | USF_PRINT_FILES;
-               ret = adu_loop_reverse(ui->table, UT_FILES, &usi, user_stats_loop_function,
-                       &usi.ret, &usi.osl_errno);
-               if (ret < 0)
-                       return ret;
-               printf("\n");
-       }
-       return 1;
-}
-
-static void print_global_summary(void)
-{
-       char d[FORMATED_VALUE_SIZE], f[FORMATED_VALUE_SIZE],
-               s[FORMATED_VALUE_SIZE];
-       enum enum_count_unit ud, uf;
-       enum enum_size_unit us;
-
-       ud = format_count_value(conf.count_unit_arg, num_dirs, 0, d);
-       uf = format_count_value(conf.count_unit_arg, num_files, 0, f);
-       us = format_size_value(conf.size_unit_arg, num_bytes, 0, s);
-
-       printf("Global summary "
-               "(dirs(%c)/files(%c)/size(%c))\n"
-               "\t%s\t%s\t%s\n\n",
-               count_unit_abbrevs[ud],
-               count_unit_abbrevs[uf],
-               size_unit_abbrevs[us],
-               d, f, s
-       );
-
-}
-
-static int print_statistics(void)
-{
-       int ret;
-       struct global_stats_info gsi = {
-               .count = conf.limit_arg,
-               .flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY
-       };
-
-       printf("By size%s:\n",
-               size_unit_buf);
-       ret = adu_loop_reverse(dir_table, DT_BYTES, &gsi,
-               global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
-       if (ret < 0)
-               return ret;
-       printf("\n");
-
-       gsi.count = conf.limit_arg;
-       gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
-       printf("By file count%s:\n",
-               count_unit_buf);
-       ret = adu_loop_reverse(dir_table, DT_FILES, &gsi,
-               global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
-       if (ret < 0)
-               return ret;
-       printf("\n");
-       print_global_summary();
-       print_user_stats();
-       print_id_stats();
-       return 1;
-}
-
-static char *get_uid_list_name(void)
+char *get_uid_list_name(void)
 {
        return make_message("%s/uid_list", conf.database_dir_arg);
 }
@@ -1123,7 +624,7 @@ static int write_uid_list(void)
        return ret;
 }
 
-static int open_dir_table(void)
+int open_dir_table(void)
 {
        if (!dir_table_desc.dir) /* we did not create the table */
                dir_table_desc.dir = adu_strdup(conf.database_dir_arg);
@@ -1157,63 +658,6 @@ out:
        return ret;
 }
 
-static int read_uid_file(void)
-{
-       size_t size;
-       uint32_t n;
-       char *filename = get_uid_list_name(), *map;
-       int ret = mmap_full_file(filename, O_RDONLY, (void **)&map, &size, NULL);
-
-       if (ret < 0) {
-               INFO_LOG("failed to map %s\n", filename);
-               free(filename);
-               return ret;
-       }
-       num_uids = size / 4;
-       INFO_LOG("found %u uids in %s\n", (unsigned)num_uids, filename);
-       free(filename);
-       /* hash table size should be a power of two and larger than the number of uids */
-       uid_hash_table_size = 4;
-       while (uid_hash_table_size < num_uids)
-               uid_hash_table_size *= 2;
-       create_hash_table();
-       for (n = 0; n < num_uids; n++) {
-               uint32_t uid = read_u32(map + n * sizeof(uid));
-               ret = search_uid(uid, OPEN_USER_TABLE, NULL);
-               if (ret < 0)
-                       goto out;
-       }
-out:
-       adu_munmap(map, size);
-       return ret;
-}
-
-static int com_select(void)
-{
-       int ret;
-
-       if (conf.count_unit_arg != count_unit_arg_h)
-               count_unit_buf[1] = count_unit_abbrevs[conf.count_unit_arg];
-       else
-               count_unit_buf[0] = '\0';
-       if (conf.size_unit_arg != size_unit_arg_h)
-               size_unit_buf[1] = size_unit_abbrevs[conf.size_unit_arg];
-       else
-               size_unit_buf[0] = '\0';
-
-       ret = open_dir_table();
-       if (ret < 0)
-               return ret;
-       check_signals();
-       ret = read_uid_file();
-       if (ret < 0)
-               return ret;
-       check_signals();
-       ret = print_statistics();
-       close_all_tables();
-       return ret;
-}
-
 static int check_args(void)
 {
        int i, ret;
diff --git a/adu.h b/adu.h
index 775af7f..69488a4 100644 (file)
--- a/adu.h
+++ b/adu.h
@@ -4,7 +4,7 @@
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
-/** \file para.h global paraslash definitions */
+/** \file adu.h Global definitions. */
 
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <osl.h>
 #include "gcc-compat.h"
 
-/** compute the minimum of \a a and \a b */
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-/** compute the maximum of \a a and \a b */
-#define MAX(a,b) ((a) > (b) ? (a) : (b))
-/** compute the absolute value of \a a */
-#define ABS(a) ((a) > 0 ? (a) : -(a))
-
 /** debug loglevel, gets really noisy */
 #define DEBUG 1
 /** still noisy, but won't fill your disk */
@@ -94,7 +87,6 @@
 #define EMERG_LOG(...)
 #endif
 /** \endcond */
-__printf_2_3 void __log(int, const char*, ...);
 
 /**
  * Write a log message to a dynamically allocated string.
@@ -125,3 +117,94 @@ __printf_2_3 void __log(int, const char*, ...);
                p = adu_realloc(p, size); \
        } \
 }
+
+#define FOR_EACH_USER(ui) for (ui = uid_hash_table; ui && ui < uid_hash_table \
+               + uid_hash_table_size; ui++)
+
+/** 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 the parent directory. */
+       DT_PARENT_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
+};
+
+/** 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
+};
+
+enum uid_info_flags {
+       /** Whether this slot of the hash table is used. */
+       UI_FL_SLOT_USED = 1,
+       /** Whether this uid should be taken into account. */
+       UI_FL_ADMISSIBLE = 2,
+};
+
+struct user_info {
+       uint32_t uid;
+       uint32_t flags;
+       char *pw_name;
+       struct osl_table *table;
+       uint64_t files;
+       uint64_t bytes;
+       uint64_t dirs;
+       struct osl_table_description *desc;
+};
+
+struct uid_range {
+       uint32_t low;
+       uint32_t high;
+};
+
+enum search_uid_flags {
+       OPEN_USER_TABLE = 1,
+       CREATE_USER_TABLE = 2,
+};
+
+extern uint32_t num_uids;
+extern uint32_t uid_hash_table_size;
+extern struct osl_table *dir_table;
+extern struct user_info *uid_hash_table;
+extern uint64_t num_dirs;
+extern uint64_t num_files;
+extern uint64_t num_bytes;
+extern struct gengetopt_args_info conf;
+
+/* adu.c */
+__printf_2_3 void __log(int, const char*, ...);
+int open_dir_table(void);
+void check_signals(void);
+void close_all_tables(void);
+char *get_uid_list_name(void);
+void create_hash_table(void);
+int search_uid(uint32_t uid, enum search_uid_flags flags,
+               struct user_info **ui_ptr);
+
+/* select.c */
+int com_select(void);
+
+static inline int ui_used(struct user_info *ui)
+{
+       return ui->flags & UI_FL_SLOT_USED;
+}
+
+static inline int ui_admissible(struct user_info *ui)
+{
+       return ui->flags & UI_FL_ADMISSIBLE;
+}
diff --git a/select.c b/select.c
new file mode 100644 (file)
index 0000000..b394676
--- /dev/null
+++ b/select.c
@@ -0,0 +1,512 @@
+/*
+ * Copyright (C) 2008 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+/** \file select.c The select mode of adu. */
+
+#include <dirent.h> /* readdir() */
+#include "adu.h"
+#include "gcc-compat.h"
+#include "cmdline.h"
+#include "fd.h"
+#include "string.h"
+#include "error.h"
+#include "portable_io.h"
+
+/** The decimal representation of an uint64_t never exceeds that size. */
+#define FORMATED_VALUE_SIZE 25
+
+/* these get filled in by the select command. */
+static char count_unit_buf[4] = "( )", size_unit_buf[4] = "( )";
+
+enum global_stats_flags {
+       GSF_PRINT_DIRNAME = 1,
+       GSF_PRINT_BYTES = 2,
+       GSF_PRINT_FILES = 4,
+       GSF_COMPUTE_SUMMARY = 8,
+};
+
+struct global_stats_info {
+       uint32_t count;
+       int ret;
+       int osl_errno;
+       enum global_stats_flags flags;
+};
+
+enum user_stats_flags {
+       USF_PRINT_DIRNAME = 1,
+       USF_PRINT_BYTES = 2,
+       USF_PRINT_FILES = 4,
+       USF_COMPUTE_SUMMARY = 8,
+};
+
+struct user_stats_info {
+       uint32_t count;
+       enum user_stats_flags flags;
+       int ret;
+       int osl_errno;
+       struct user_info *ui;
+};
+
+static const uint64_t size_unit_divisors[] = {
+       [size_unit_arg_b] = 1ULL,
+       [size_unit_arg_k] = 1024ULL,
+       [size_unit_arg_m] = 1024ULL * 1024ULL,
+       [size_unit_arg_g] = 1024ULL * 1024ULL * 1024ULL,
+       [size_unit_arg_t] = 1024ULL * 1024ULL * 1024ULL * 1024ULL,
+};
+
+static const uint64_t count_unit_divisors[] = {
+
+       [count_unit_arg_n] = 1ULL,
+       [count_unit_arg_k] = 1000ULL,
+       [count_unit_arg_m] = 1000ULL * 1000ULL,
+       [count_unit_arg_g] = 1000ULL * 1000ULL * 1000ULL,
+       [count_unit_arg_t] = 1000ULL * 1000ULL * 1000ULL * 1000ULL,
+};
+
+static const char size_unit_abbrevs[] = " BKMGT";
+static const char count_unit_abbrevs[] = "  kmgt";
+
+static enum enum_size_unit format_size_value(enum enum_size_unit unit,
+               uint64_t value, int print_unit, char *result)
+{
+       enum enum_size_unit u = unit;
+       char unit_buf[2] = "\0\0";
+
+       if (unit == size_unit_arg_h) /* human readable */
+               for (u = size_unit_arg_b; u < size_unit_arg_t &&
+                               value > size_unit_divisors[u + 1]; u++)
+                       ; /* nothing */
+       if (print_unit)
+               unit_buf[0] = size_unit_abbrevs[u];
+       sprintf(result, "%llu%s",
+               (long long unsigned)value / size_unit_divisors[u], unit_buf);
+       return u;
+}
+
+static enum enum_count_unit format_count_value(enum enum_count_unit unit,
+               uint64_t value, int print_unit, char *result)
+{
+       enum enum_count_unit u = unit;
+       char unit_buf[2] = "\0\0";
+
+       if (unit == count_unit_arg_h) /* human readable */
+               for (u = count_unit_arg_n; u < count_unit_arg_t &&
+                               value > count_unit_divisors[u + 1]; u++)
+                       ; /* nothing */
+       if (print_unit)
+               unit_buf[0] = count_unit_abbrevs[u];
+       sprintf(result, "%llu%s",
+               (long long unsigned)value / count_unit_divisors[u], unit_buf);
+       return u;
+}
+
+static int get_dir_name_by_number(uint64_t *dirnum, char **name)
+{
+       char *result = NULL, *tmp;
+       struct osl_row *row;
+       uint64_t val = *dirnum;
+       struct osl_object obj = {.data = &val, .size = sizeof(val)};
+       int ret;
+
+again:
+       ret = osl(osl_get_row(dir_table, DT_NUM, &obj, &row));
+       if (ret < 0)
+               goto out;
+       ret = osl(osl_get_object(dir_table, row, DT_NAME, &obj));
+       if (ret < 0)
+               goto out;
+       if (result) {
+               tmp = make_message("%s/%s", (char *)obj.data, result);
+               free(result);
+               result = tmp;
+       } else
+               result = adu_strdup((char *)obj.data);
+       ret = osl(osl_get_object(dir_table, row, DT_PARENT_NUM, &obj));
+       if (ret < 0)
+               goto out;
+       val = *(uint64_t *)obj.data;
+       if (val)
+               goto again;
+out:
+       if (ret < 0) {
+               free(result);
+               *name = NULL;
+       } else
+               *name = result;
+       return ret;
+}
+
+static int get_dir_name_of_row(struct osl_row *dir_table_row, char **name)
+{
+       struct osl_object obj;
+       int ret;
+       char *this_dir, *prefix = NULL;
+
+       *name = NULL;
+       ret = osl(osl_get_object(dir_table, dir_table_row, DT_NAME, &obj));
+       if (ret < 0)
+               return ret;
+       this_dir = adu_strdup((char *)obj.data);
+       ret = osl(osl_get_object(dir_table, dir_table_row, DT_PARENT_NUM, &obj));
+       if (ret < 0)
+               goto out;
+       if (!*(uint64_t *)obj.data) {
+               *name = this_dir;
+               return 1;
+       }
+       ret = get_dir_name_by_number((uint64_t *)obj.data, &prefix);
+       if (ret < 0)
+               goto out;
+       *name = make_message("%s/%s", prefix, this_dir);
+       free(prefix);
+       ret = 1;
+out:
+       free(this_dir);
+       return ret;
+}
+static int user_stats_loop_function(struct osl_row *row, void *data)
+{
+       struct user_stats_info *usi = data;
+       struct osl_object obj;
+       int ret, summary = usi->flags & GSF_COMPUTE_SUMMARY;
+       char formated_value[FORMATED_VALUE_SIZE];
+
+       check_signals();
+       if (!usi->count && !summary) {
+               ret = -E_LOOP_COMPLETE;
+               goto err;
+       }
+       if (summary || (usi->count && (usi->flags & USF_PRINT_FILES))) {
+               uint64_t files;
+               ret = osl(osl_get_object(usi->ui->table, row, UT_FILES, &obj));
+               if (ret < 0)
+                       goto err;
+               files = *(uint64_t *)obj.data;
+               if (usi->count && (usi->flags & USF_PRINT_FILES)) {
+                       format_count_value(conf.count_unit_arg, files,
+                               conf.count_unit_arg == count_unit_arg_h,
+                               formated_value);
+                       printf("\t%s%s", formated_value,
+                               (usi->flags & (USF_PRINT_BYTES | USF_PRINT_DIRNAME))?
+                                       "\t" : "\n"
+                       );
+               }
+               if (summary)
+                       usi->ui->files += files;
+       }
+       if (summary || (usi->count && (usi->flags & USF_PRINT_BYTES))) {
+               uint64_t bytes;
+               ret = osl(osl_get_object(usi->ui->table, row, UT_BYTES, &obj));
+               if (ret < 0)
+                       goto err;
+               bytes = *(uint64_t *)obj.data;
+               if (usi->count && (usi->flags & USF_PRINT_BYTES)) {
+                       format_size_value(conf.size_unit_arg, bytes,
+                               conf.size_unit_arg == size_unit_arg_h,
+                               formated_value);
+                       printf("%s%s%s",
+                               (usi->flags & USF_PRINT_FILES)? "" : "\t",
+                               formated_value,
+                               usi->flags & USF_PRINT_DIRNAME?  "\t" : "\n"
+                       );
+               }
+               if (summary) {
+                       usi->ui->bytes += bytes;
+                       usi->ui->dirs++;
+               }
+
+       }
+       if (usi->count && (usi->flags & USF_PRINT_DIRNAME)) {
+               char *dirname;
+               ret = osl(osl_get_object(usi->ui->table, row, UT_DIR_NUM, &obj));
+               if (ret < 0)
+                       goto err;
+               ret = get_dir_name_by_number((uint64_t *)obj.data, &dirname);
+               if (ret < 0)
+                       goto err;
+               printf("%s%s\n",
+                       (usi->flags & (USF_PRINT_BYTES | USF_PRINT_FILES))? "" : "\t",
+                       dirname);
+               free(dirname);
+       }
+       if (usi->count > 0)
+               usi->count--;
+       return 1;
+err:
+       usi->ret = ret;
+       usi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
+       return -1;
+}
+
+static int global_stats_loop_function(struct osl_row *row, void *data)
+{
+       struct global_stats_info *gsi = data;
+       struct osl_object obj;
+       char *dirname, formated_value[FORMATED_VALUE_SIZE];
+       int ret, summary = gsi->flags & GSF_COMPUTE_SUMMARY;
+
+       check_signals();
+       if (!gsi->count && !summary) {
+               ret = -E_LOOP_COMPLETE;
+               goto err;
+       }
+       if (summary || (gsi->count && (gsi->flags & GSF_PRINT_FILES))) {
+               uint64_t files;
+               ret = osl(osl_get_object(dir_table, row, DT_FILES, &obj));
+               if (ret < 0)
+                       goto err;
+               files = *(uint64_t *)obj.data;
+               if (gsi->count && (gsi->flags & GSF_PRINT_FILES)) {
+                       format_count_value(conf.count_unit_arg, files,
+                               conf.count_unit_arg == count_unit_arg_h,
+                               formated_value);
+                       printf("\t%s%s", formated_value,
+                               (gsi->flags & (GSF_PRINT_BYTES | GSF_PRINT_DIRNAME))?
+                               "\t" : "\n");
+               }
+               if (summary)
+                       num_files += files;
+       }
+       if (summary || (gsi->count && (gsi->flags & GSF_PRINT_BYTES))) {
+               uint64_t bytes;
+               ret = osl(osl_get_object(dir_table, row, DT_BYTES, &obj));
+               if (ret < 0)
+                       goto err;
+               bytes = *(uint64_t *)obj.data;
+               if (gsi->count && (gsi->flags & GSF_PRINT_BYTES)) {
+                       format_size_value(conf.size_unit_arg, bytes,
+                               conf.size_unit_arg == size_unit_arg_h,
+                               formated_value);
+                       printf("%s%s%s",
+                               (gsi->flags & GSF_PRINT_FILES)? "" : "\t",
+                               formated_value,
+                               (gsi->flags & GSF_PRINT_DIRNAME)? "\t" : "\n"
+                       );
+               }
+               if (summary) {
+                       num_bytes += bytes;
+                       num_dirs++;
+               }
+       }
+       if (gsi->count && (gsi->flags & GSF_PRINT_DIRNAME)) {
+               ret = get_dir_name_of_row(row, &dirname);
+               if (ret < 0)
+                       goto err;
+               printf("%s%s\n",
+                       (gsi->flags & (GSF_PRINT_BYTES | GSF_PRINT_FILES))? "" : "\t",
+                       dirname);
+               free(dirname);
+       }
+       if (gsi->count > 0)
+               gsi->count--;
+       return 1;
+err:
+       gsi->ret = ret;
+       gsi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
+       return -1;
+}
+
+static int check_loop_return(int ret, int loop_ret, int loop_osl_errno)
+{
+       if (ret >= 0)
+               return ret;
+       assert(ret == -E_OSL);
+       if (osl_errno != E_OSL_LOOP)
+               /* error not caused by loop function returning negative. */
+               return ret;
+       assert(loop_ret < 0);
+       if (loop_ret == -E_LOOP_COMPLETE) /* no error */
+               return 1;
+       if (loop_ret == -E_OSL) { /* osl error in loop function */
+               assert(loop_osl_errno);
+               osl_errno = loop_osl_errno;
+       }
+       return loop_ret;
+}
+
+static int adu_loop_reverse(struct osl_table *t, unsigned col_num, void *private_data,
+               osl_rbtree_loop_func *func, int *loop_ret, int *loop_osl_errno)
+{
+       int ret = osl(osl_rbtree_loop_reverse(t, col_num, private_data, func));
+       return check_loop_return(ret, *loop_ret, *loop_osl_errno);
+}
+
+static void print_global_summary(void)
+{
+       char d[FORMATED_VALUE_SIZE], f[FORMATED_VALUE_SIZE],
+               s[FORMATED_VALUE_SIZE];
+       enum enum_count_unit ud, uf;
+       enum enum_size_unit us;
+
+       ud = format_count_value(conf.count_unit_arg, num_dirs, 0, d);
+       uf = format_count_value(conf.count_unit_arg, num_files, 0, f);
+       us = format_size_value(conf.size_unit_arg, num_bytes, 0, s);
+
+       printf("Global summary "
+               "(dirs(%c)/files(%c)/size(%c))\n"
+               "\t%s\t%s\t%s\n\n",
+               count_unit_abbrevs[ud],
+               count_unit_abbrevs[uf],
+               size_unit_abbrevs[us],
+               d, f, s
+       );
+
+}
+
+static void print_id_stats(void)
+{
+       struct user_info *ui;
+
+       printf("User summary "
+               "(pw_name/uid/dirs%s/files%s/size%s):\n",
+               count_unit_buf, count_unit_buf, size_unit_buf);
+       FOR_EACH_USER(ui) {
+               char formated_dir_count[FORMATED_VALUE_SIZE],
+                       formated_file_count[FORMATED_VALUE_SIZE],
+                       formated_bytes[FORMATED_VALUE_SIZE ];
+               if (!ui_used(ui) || !ui_admissible(ui))
+                       continue;
+               format_count_value(conf.count_unit_arg, ui->dirs,
+                       conf.count_unit_arg == count_unit_arg_h,
+                       formated_dir_count);
+               format_count_value(conf.count_unit_arg, ui->files,
+                       conf.count_unit_arg == count_unit_arg_h,
+                       formated_file_count);
+               format_size_value(conf.size_unit_arg, ui->bytes,
+                       conf.size_unit_arg == size_unit_arg_h,
+                       formated_bytes);
+               printf("\t%s\t%u\t%s\t%s\t%s\n",
+                       ui->pw_name? ui->pw_name : "?",
+                       (unsigned)ui->uid,
+                       formated_dir_count,
+                       formated_file_count,
+                       formated_bytes
+               );
+       }
+}
+
+static int print_user_stats(void)
+{
+       struct user_info *ui;
+       int ret;
+
+       FOR_EACH_USER(ui) {
+               struct user_stats_info usi = {
+                       .count = conf.limit_arg,
+                       .ui = ui
+               };
+               if (!ui_used(ui) || !ui_admissible(ui))
+                       continue;
+               usi.flags = USF_PRINT_DIRNAME | USF_PRINT_BYTES | USF_COMPUTE_SUMMARY;
+               printf("%s (uid %u), by size%s:\n",
+                       ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
+                       size_unit_buf);
+               ret = adu_loop_reverse(ui->table, UT_BYTES, &usi, user_stats_loop_function,
+                       &usi.ret, &usi.osl_errno);
+               if (ret < 0)
+                       return ret;
+               printf("\n%s (uid %u), by file count%s:\n",
+                       ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
+                       count_unit_buf);
+               usi.count = conf.limit_arg,
+               usi.flags = USF_PRINT_DIRNAME | USF_PRINT_FILES;
+               ret = adu_loop_reverse(ui->table, UT_FILES, &usi, user_stats_loop_function,
+                       &usi.ret, &usi.osl_errno);
+               if (ret < 0)
+                       return ret;
+               printf("\n");
+       }
+       return 1;
+}
+
+static int print_statistics(void)
+{
+       int ret;
+       struct global_stats_info gsi = {
+               .count = conf.limit_arg,
+               .flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY
+       };
+
+       printf("By size%s:\n",
+               size_unit_buf);
+       ret = adu_loop_reverse(dir_table, DT_BYTES, &gsi,
+               global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
+       if (ret < 0)
+               return ret;
+       printf("\n");
+
+       gsi.count = conf.limit_arg;
+       gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
+       printf("By file count%s:\n",
+               count_unit_buf);
+       ret = adu_loop_reverse(dir_table, DT_FILES, &gsi,
+               global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
+       if (ret < 0)
+               return ret;
+       printf("\n");
+       print_global_summary();
+       print_user_stats();
+       print_id_stats();
+       return 1;
+}
+
+static int read_uid_file(void)
+{
+       size_t size;
+       uint32_t n;
+       char *filename = get_uid_list_name(), *map;
+       int ret = mmap_full_file(filename, O_RDONLY, (void **)&map, &size, NULL);
+
+       if (ret < 0) {
+               INFO_LOG("failed to map %s\n", filename);
+               free(filename);
+               return ret;
+       }
+       num_uids = size / 4;
+       INFO_LOG("found %u uids in %s\n", (unsigned)num_uids, filename);
+       free(filename);
+       /* hash table size should be a power of two and larger than the number of uids */
+       uid_hash_table_size = 4;
+       while (uid_hash_table_size < num_uids)
+               uid_hash_table_size *= 2;
+       create_hash_table();
+       for (n = 0; n < num_uids; n++) {
+               uint32_t uid = read_u32(map + n * sizeof(uid));
+               ret = search_uid(uid, OPEN_USER_TABLE, NULL);
+               if (ret < 0)
+                       goto out;
+       }
+out:
+       adu_munmap(map, size);
+       return ret;
+}
+
+int com_select(void)
+{
+       int ret;
+
+       if (conf.count_unit_arg != count_unit_arg_h)
+               count_unit_buf[1] = count_unit_abbrevs[conf.count_unit_arg];
+       else
+               count_unit_buf[0] = '\0';
+       if (conf.size_unit_arg != size_unit_arg_h)
+               size_unit_buf[1] = size_unit_abbrevs[conf.size_unit_arg];
+       else
+               size_unit_buf[0] = '\0';
+
+       ret = open_dir_table();
+       if (ret < 0)
+               return ret;
+       check_signals();
+       ret = read_uid_file();
+       if (ret < 0)
+               return ret;
+       check_signals();
+       ret = print_statistics();
+       close_all_tables();
+       return ret;
+}