select.c

   1 /*
   2  * Copyright (C) 2008 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file select.c The select mode of adu. */
   8
   9 #include <dirent.h> /* readdir() */
  10 #include "format.h"
  11 #include "adu.h"
  12 #include "gcc-compat.h"
  13 #include "cmdline.h"
  14 #include "fd.h"
  15 #include "string.h"
  16 #include "error.h"
  17 #include "portable_io.h"
  18
  19 /** Global dir count. */
  20 static uint64_t num_dirs;
  21 /** Global files count. */
  22 static uint64_t num_files;
  23 /** Global bytes count. */
  24 static uint64_t num_bytes;
  25
  26
  27 /** The decimal representation of an uint64_t never exceeds that size. */
  28 #define FORMATED_VALUE_SIZE 25
  29
  30 #define USER_SUMMARY_ATOMS \
  31         ATOM(pw_name, STRING) \
  32         ATOM(uid, ID) \
  33         ATOM(dirs, COUNT) \
  34         ATOM(files, COUNT) \
  35         ATOM(size, SIZE)
  36
  37 #define ATOM(x, y) { .name = #x, .type = AT_ ## y},
  38 struct atom user_summary_atoms[] = {
  39         USER_SUMMARY_ATOMS
  40         {.name = NULL}
  41 };
  42 #undef ATOM
  43 #define ATOM(x, y) usa_ ## x,
  44 enum user_summary_atoms {USER_SUMMARY_ATOMS};
  45 #undef ATOM
  46
  47 /* these get filled in by the select command. */
  48 static char count_unit_buf[4] = "( )", size_unit_buf[4] = "( )";
  49
  50 enum global_stats_flags {
  51         GSF_PRINT_DIRNAME = 1,
  52         GSF_PRINT_BYTES = 2,
  53         GSF_PRINT_FILES = 4,
  54         GSF_COMPUTE_SUMMARY = 8,
  55 };
  56
  57 struct global_stats_info {
  58         uint32_t count;
  59         int ret;
  60         int osl_errno;
  61         enum global_stats_flags flags;
  62 };
  63
  64 enum user_stats_flags {
  65         USF_PRINT_DIRNAME = 1,
  66         USF_PRINT_BYTES = 2,
  67         USF_PRINT_FILES = 4,
  68         USF_COMPUTE_SUMMARY = 8,
  69 };
  70
  71 struct user_stats_info {
  72         uint32_t count;
  73         enum user_stats_flags flags;
  74         int ret;
  75         int osl_errno;
  76         struct user_info *ui;
  77 };
  78
  79 static const uint64_t size_unit_divisors[] = {
  80         [size_unit_arg_b] = 1ULL,
  81         [size_unit_arg_k] = 1024ULL,
  82         [size_unit_arg_m] = 1024ULL * 1024ULL,
  83         [size_unit_arg_g] = 1024ULL * 1024ULL * 1024ULL,
  84         [size_unit_arg_t] = 1024ULL * 1024ULL * 1024ULL * 1024ULL,
  85 };
  86
  87 static const uint64_t count_unit_divisors[] = {
  88
  89         [count_unit_arg_n] = 1ULL,
  90         [count_unit_arg_k] = 1000ULL,
  91         [count_unit_arg_m] = 1000ULL * 1000ULL,
  92         [count_unit_arg_g] = 1000ULL * 1000ULL * 1000ULL,
  93         [count_unit_arg_t] = 1000ULL * 1000ULL * 1000ULL * 1000ULL,
  94 };
  95
  96 static const char size_unit_abbrevs[] = " BKMGT";
  97 static const char count_unit_abbrevs[] = "  kmgt";
  98 static enum enum_size_unit format_size_value(enum enum_size_unit unit,
  99                 uint64_t value, int print_unit, char *result)
 100 {
 101         enum enum_size_unit u = unit;
 102         char unit_buf[2] = "\0\0";
 103
 104         if (unit == size_unit_arg_h) /* human readable */
 105                 for (u = size_unit_arg_b; u < size_unit_arg_t &&
 106                                 value > size_unit_divisors[u + 1]; u++)
 107                         ; /* nothing */
 108         if (print_unit)
 109                 unit_buf[0] = size_unit_abbrevs[u];
 110         sprintf(result, "%llu%s",
 111                 (long long unsigned)value / size_unit_divisors[u], unit_buf);
 112         return u;
 113 }
 114
 115 static enum enum_count_unit format_count_value(enum enum_count_unit unit,
 116                 uint64_t value, int print_unit, char *result)
 117 {
 118         enum enum_count_unit u = unit;
 119         char unit_buf[2] = "\0\0";
 120
 121         if (unit == count_unit_arg_h) /* human readable */
 122                 for (u = count_unit_arg_n; u < count_unit_arg_t &&
 123                                 value > count_unit_divisors[u + 1]; u++)
 124                         ; /* nothing */
 125         if (print_unit)
 126                 unit_buf[0] = count_unit_abbrevs[u];
 127         sprintf(result, "%llu%s",
 128                 (long long unsigned)value / count_unit_divisors[u], unit_buf);
 129         return u;
 130 }
 131
 132 static FILE *output_file;
 133
 134 __printf_1_2 static int output(const char const *fmt, ...)
 135 {
 136         va_list argp;
 137         int ret;
 138
 139         va_start(argp, fmt);
 140         ret = vfprintf(output_file, fmt, argp);
 141         va_end(argp);
 142         return ret < 0? -E_OUTPUT : 1;
 143 }
 144
 145 static int get_dir_name_by_number(uint64_t *dirnum, char **name)
 146 {
 147         char *result = NULL, *tmp;
 148         struct osl_row *row;
 149         uint64_t val = *dirnum;
 150         struct osl_object obj;
 151         int ret;
 152         char *pfx;
 153
 154 again:
 155         obj.data = &val;
 156         obj.size = sizeof(val);
 157         ret = osl(osl_get_row(dir_table, DT_NUM, &obj, &row));
 158         if (ret < 0)
 159                 goto out;
 160         ret = osl(osl_get_object(dir_table, row, DT_PARENT_NUM, &obj));
 161         if (ret < 0)
 162                 goto out;
 163         val = *(uint64_t *)obj.data;
 164         ret = osl(osl_get_object(dir_table, row, DT_NAME, &obj));
 165         if (ret < 0)
 166                 goto out;
 167         pfx = (select_conf.print_base_dir_given || val)? (char *)obj.data :  ".";
 168         tmp = make_message("%s/%s", pfx, result? result : "");
 169         free(result);
 170         result = tmp;
 171         if (val)
 172                 goto again;
 173 out:
 174         if (ret < 0) {
 175                 free(result);
 176                 *name = NULL;
 177         } else {
 178                 assert(result);
 179                 *name = result;
 180         }
 181         return ret;
 182 }
 183
 184 static int get_dir_name_of_row(struct osl_row *dir_table_row, char **name)
 185 {
 186         struct osl_object obj;
 187         int ret;
 188
 189         *name = NULL;
 190         ret = osl(osl_get_object(dir_table, dir_table_row, DT_NUM, &obj));
 191         if (ret < 0)
 192                 return ret;
 193         return get_dir_name_by_number((uint64_t *)obj.data, name);
 194 }
 195
 196 static int user_stats_loop_function(struct osl_row *row, void *data)
 197 {
 198         struct user_stats_info *usi = data;
 199         struct osl_object obj;
 200         int ret, summary = usi->flags & GSF_COMPUTE_SUMMARY;
 201         char formated_value[FORMATED_VALUE_SIZE];
 202
 203         check_signals();
 204         if (!usi->count && !summary) {
 205                 ret = -E_LOOP_COMPLETE;
 206                 goto err;
 207         }
 208         if (summary || (usi->count && (usi->flags & USF_PRINT_FILES))) {
 209                 uint64_t files;
 210                 ret = osl(osl_get_object(usi->ui->table, row, UT_FILES, &obj));
 211                 if (ret < 0)
 212                         goto err;
 213                 files = *(uint64_t *)obj.data;
 214                 if (usi->count && (usi->flags & USF_PRINT_FILES)) {
 215                         format_count_value(select_conf.count_unit_arg, files,
 216                                 select_conf.count_unit_arg == count_unit_arg_h,
 217                                 formated_value);
 218                         ret = output("\t%s%s", formated_value,
 219                                 (usi->flags & (USF_PRINT_BYTES | USF_PRINT_DIRNAME))?
 220                                         "\t" : "\n");
 221                         if (ret < 0)
 222                                 goto err;
 223                 }
 224                 if (summary)
 225                         usi->ui->files += files;
 226         }
 227         if (summary || (usi->count && (usi->flags & USF_PRINT_BYTES))) {
 228                 uint64_t bytes;
 229                 ret = osl(osl_get_object(usi->ui->table, row, UT_BYTES, &obj));
 230                 if (ret < 0)
 231                         goto err;
 232                 bytes = *(uint64_t *)obj.data;
 233                 if (usi->count && (usi->flags & USF_PRINT_BYTES)) {
 234                         format_size_value(select_conf.size_unit_arg, bytes,
 235                                 select_conf.size_unit_arg == size_unit_arg_h,
 236                                 formated_value);
 237                         ret = output("%s%s%s",
 238                                 (usi->flags & USF_PRINT_FILES)? "" : "\t",
 239                                 formated_value,
 240                                 usi->flags & USF_PRINT_DIRNAME?  "\t" : "\n"
 241                         );
 242                         if (ret < 0)
 243                                 goto err;
 244                 }
 245                 if (summary) {
 246                         usi->ui->bytes += bytes;
 247                         usi->ui->dirs++;
 248                 }
 249
 250         }
 251         if (usi->count && (usi->flags & USF_PRINT_DIRNAME)) {
 252                 char *dirname;
 253                 ret = osl(osl_get_object(usi->ui->table, row, UT_DIR_NUM, &obj));
 254                 if (ret < 0)
 255                         goto err;
 256                 ret = get_dir_name_by_number((uint64_t *)obj.data, &dirname);
 257                 if (ret < 0)
 258                         goto err;
 259                 ret = output("%s%s\n",
 260                         (usi->flags & (USF_PRINT_BYTES | USF_PRINT_FILES))? "" : "\t",
 261                         dirname);
 262                 free(dirname);
 263                 if (ret < 0)
 264                         goto err;
 265         }
 266         if (usi->count > 0)
 267                 usi->count--;
 268         return 1;
 269 err:
 270         usi->ret = ret;
 271         usi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
 272         return -1;
 273 }
 274
 275 static int global_stats_loop_function(struct osl_row *row, void *data)
 276 {
 277         struct global_stats_info *gsi = data;
 278         struct osl_object obj;
 279         char *dirname, formated_value[FORMATED_VALUE_SIZE];
 280         int ret, summary = gsi->flags & GSF_COMPUTE_SUMMARY;
 281
 282         check_signals();
 283         if (!gsi->count && !summary) {
 284                 ret = -E_LOOP_COMPLETE;
 285                 goto err;
 286         }
 287         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_FILES))) {
 288                 uint64_t files;
 289                 ret = osl(osl_get_object(dir_table, row, DT_FILES, &obj));
 290                 if (ret < 0)
 291                         goto err;
 292                 files = *(uint64_t *)obj.data;
 293                 if (gsi->count && (gsi->flags & GSF_PRINT_FILES)) {
 294                         format_count_value(select_conf.count_unit_arg, files,
 295                                 select_conf.count_unit_arg == count_unit_arg_h,
 296                                 formated_value);
 297                         ret = output("\t%s%s", formated_value,
 298                                 (gsi->flags & (GSF_PRINT_BYTES | GSF_PRINT_DIRNAME))?
 299                                 "\t" : "\n");
 300                         if (ret < 0)
 301                                 goto err;
 302                 }
 303                 if (summary)
 304                         num_files += files;
 305         }
 306         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_BYTES))) {
 307                 uint64_t bytes;
 308                 ret = osl(osl_get_object(dir_table, row, DT_BYTES, &obj));
 309                 if (ret < 0)
 310                         goto err;
 311                 bytes = *(uint64_t *)obj.data;
 312                 if (gsi->count && (gsi->flags & GSF_PRINT_BYTES)) {
 313                         format_size_value(select_conf.size_unit_arg, bytes,
 314                                 select_conf.size_unit_arg == size_unit_arg_h,
 315                                 formated_value);
 316                         ret = output("%s%s%s",
 317                                 (gsi->flags & GSF_PRINT_FILES)? "" : "\t",
 318                                 formated_value,
 319                                 (gsi->flags & GSF_PRINT_DIRNAME)? "\t" : "\n"
 320                         );
 321                         if (ret < 0)
 322                                 goto err;
 323                 }
 324                 if (summary) {
 325                         num_bytes += bytes;
 326                         num_dirs++;
 327                 }
 328         }
 329         if (gsi->count && (gsi->flags & GSF_PRINT_DIRNAME)) {
 330                 ret = get_dir_name_of_row(row, &dirname);
 331                 if (ret < 0)
 332                         goto err;
 333                 ret = output("%s%s\n",
 334                         (gsi->flags & (GSF_PRINT_BYTES | GSF_PRINT_FILES))? "" : "\t",
 335                         dirname);
 336                 free(dirname);
 337                 if (ret < 0)
 338                         goto err;
 339         }
 340         if (gsi->count > 0)
 341                 gsi->count--;
 342         return 1;
 343 err:
 344         gsi->ret = ret;
 345         gsi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
 346         return -1;
 347 }
 348
 349 static int check_loop_return(int ret, int loop_ret, int loop_osl_errno)
 350 {
 351         if (ret >= 0)
 352                 return ret;
 353         assert(ret == -E_OSL);
 354         if (osl_errno != E_OSL_LOOP)
 355                 /* error not caused by loop function returning negative. */
 356                 return ret;
 357         assert(loop_ret < 0);
 358         if (loop_ret == -E_LOOP_COMPLETE) /* no error */
 359                 return 1;
 360         if (loop_ret == -E_OSL) { /* osl error in loop function */
 361                 assert(loop_osl_errno);
 362                 osl_errno = loop_osl_errno;
 363         }
 364         return loop_ret;
 365 }
 366
 367 static int adu_loop_reverse(struct osl_table *t, unsigned col_num, void *private_data,
 368                 osl_rbtree_loop_func *func, int *loop_ret, int *loop_osl_errno)
 369 {
 370         int ret = osl(osl_rbtree_loop_reverse(t, col_num, private_data, func));
 371         return check_loop_return(ret, *loop_ret, *loop_osl_errno);
 372 }
 373
 374 static int print_global_summary(void)
 375 {
 376         char d[FORMATED_VALUE_SIZE], f[FORMATED_VALUE_SIZE],
 377                 s[FORMATED_VALUE_SIZE];
 378         enum enum_count_unit ud, uf;
 379         enum enum_size_unit us;
 380         int ret;
 381
 382         if (select_conf.no_global_summary_given)
 383                 return 1;
 384         ud = format_count_value(select_conf.count_unit_arg, num_dirs, 0, d);
 385         uf = format_count_value(select_conf.count_unit_arg, num_files, 0, f);
 386         us = format_size_value(select_conf.size_unit_arg, num_bytes, 0, s);
 387
 388         if (!select_conf.no_headers_given) {
 389                 ret = output("Global summary "
 390                         "(dirs(%c)/files(%c)/size(%c))\n",
 391                         count_unit_abbrevs[ud],
 392                         count_unit_abbrevs[uf],
 393                         size_unit_abbrevs[us]
 394                 );
 395                 if (ret < 0)
 396                         return ret;
 397         }
 398         return output("\t%s\t%s\t%s\n\n", d, f, s);
 399 }
 400
 401 static int print_user_summary_line(struct user_info *ui, __a_unused void *data)
 402 {
 403         struct format_info *fi = data;
 404         union atom_value values[] = {
 405                 [usa_pw_name] = {.string_value = ui->pw_name?
 406                         ui->pw_name : "?"},
 407                 [usa_uid] = {.num_value = (long long unsigned)ui->uid},
 408                 [usa_dirs] = {.num_value = (long long unsigned)ui->dirs},
 409                 [usa_files] = {.num_value =  (long long unsigned)ui->files},
 410                 [usa_size] = {.num_value =  (long long unsigned)ui->bytes}
 411         };
 412         char *buf = format_items(fi, values);
 413         return output("%s", buf);
 414 }
 415
 416 static int name_comp(const void *a, const void *b)
 417 {
 418         char *x = ((struct user_info *)a)->pw_name;
 419         char *y = ((struct user_info *)b)->pw_name;
 420
 421         if (!x)
 422                 return 1;
 423         if (!y)
 424                 return -1;
 425         return strcmp(x, y);
 426 }
 427
 428 static int uid_comp(const void *a, const void *b)
 429 {
 430         return -NUM_COMPARE(((struct user_info *)a)->uid,
 431                 ((struct user_info *)b)->uid);
 432 }
 433
 434 static int dir_count_comp(const void *a, const void *b)
 435 {
 436         return NUM_COMPARE(((struct user_info *)a)->dirs,
 437                 ((struct user_info *)b)->dirs);
 438 }
 439
 440 static int file_count_comp(const void *a, const void *b)
 441 {
 442         return NUM_COMPARE(((struct user_info *)a)->files,
 443                 ((struct user_info *)b)->files);
 444 }
 445
 446 static int size_comp(const void *a, const void *b)
 447 {
 448         return NUM_COMPARE(((struct user_info *)a)->bytes,
 449                 ((struct user_info *)b)->bytes);
 450 }
 451
 452 /*
 453  * The comparators for sorting the user summary.
 454  *
 455  * This is an array of pointers to functions taking two constant void *
 456  * pointers and returning an int.
 457  */
 458 static int (*summary_comparators[])(const void *, const void *) = {
 459         [user_summary_sort_arg_name] = name_comp,
 460         [user_summary_sort_arg_uid] = uid_comp,
 461         [user_summary_sort_arg_dir_count] = dir_count_comp,
 462         [user_summary_sort_arg_file_count] = file_count_comp,
 463         [user_summary_sort_arg_size] = size_comp,
 464 };
 465
 466 static int print_user_summary(struct format_info *fi)
 467 {
 468         if (select_conf.no_user_summary_given)
 469                 return 1;
 470         if (!select_conf.no_headers_given) {
 471                 int ret = output("User summary\n");
 472                 if (ret < 0)
 473                         return ret;
 474         }
 475         sort_hash_table(summary_comparators[select_conf.user_summary_sort_arg]);
 476         return for_each_admissible_user(print_user_summary_line, fi);
 477 }
 478
 479 static int print_user_list(struct user_info *ui, __a_unused void *data)
 480 {
 481         int ret;
 482         struct user_stats_info usi;
 483         enum enum_user_list ula = select_conf.user_list_arg;
 484         int print_size_list = (ula == user_list_arg_size
 485                 || ula == user_list_arg_both);
 486
 487         if (print_size_list) {
 488                 usi.count = select_conf.limit_arg;
 489                 usi.ui = ui;
 490                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_BYTES | USF_COMPUTE_SUMMARY;
 491                 if (!select_conf.no_headers_given) {
 492                         ret = output("%s (uid %u), by size%s:\n",
 493                                 ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
 494                                 size_unit_buf);
 495                         if (ret < 0)
 496                                 return ret;
 497                 }
 498                 ret = adu_loop_reverse(ui->table, UT_BYTES, &usi, user_stats_loop_function,
 499                         &usi.ret, &usi.osl_errno);
 500                 if (ret < 0)
 501                         return ret;
 502                 ret = output("\n");
 503                 if (ret < 0)
 504                         return ret;
 505         }
 506         if (ula == user_list_arg_file_count || ula == user_list_arg_both) {
 507                 if (!select_conf.no_headers_given) {
 508                         ret = output("%s (uid %u), by file count%s:\n",
 509                                 ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
 510                                 count_unit_buf);
 511                         if (ret < 0)
 512                                 return ret;
 513                 }
 514                 usi.count = select_conf.limit_arg,
 515                 usi.ui = ui;
 516                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_FILES;
 517                 ret = adu_loop_reverse(ui->table, UT_FILES, &usi, user_stats_loop_function,
 518                         &usi.ret, &usi.osl_errno);
 519                 if (ret < 0)
 520                         return ret;
 521                 ret = output("\n");
 522                 if (ret < 0)
 523                         return ret;
 524         }
 525         if (ula == user_list_arg_none && !select_conf.no_user_summary_given) {
 526                 usi.count = select_conf.limit_arg;
 527                 usi.ui = ui;
 528                 usi.flags = USF_COMPUTE_SUMMARY;
 529                 ret = adu_loop_reverse(ui->table, UT_FILES, &usi, user_stats_loop_function,
 530                         &usi.ret, &usi.osl_errno);
 531                 if (ret < 0)
 532                         return ret;
 533         }
 534         return 1;
 535 }
 536
 537 static int print_user_lists(void)
 538 {
 539         return for_each_admissible_user(print_user_list, NULL);
 540 }
 541
 542 static int print_global_lists(void)
 543 {
 544         struct global_stats_info gsi;
 545         int ret;
 546         enum enum_global_list gla = select_conf.global_list_arg;
 547         int print_size_list = (gla == global_list_arg_size
 548                 || gla == global_list_arg_both);
 549
 550         if (print_size_list) {
 551                 gsi.count = select_conf.limit_arg;
 552                 gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY;
 553                 if (!select_conf.no_headers_given) {
 554                         ret = output("By size%s:\n", size_unit_buf);
 555                         if (ret < 0)
 556                                 return ret;
 557                 }
 558                 ret = adu_loop_reverse(dir_table, DT_BYTES, &gsi,
 559                         global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
 560                 if (ret < 0)
 561                         return ret;
 562                 ret = output("\n");
 563                 if (ret < 0)
 564                         return ret;
 565         }
 566         if (gla == global_list_arg_file_count || gla == global_list_arg_both) {
 567                 gsi.count = select_conf.limit_arg;
 568                 gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
 569                 if (!print_size_list)
 570                         gsi.flags |= GSF_COMPUTE_SUMMARY;
 571                 if (!select_conf.no_headers_given) {
 572                         ret = output("By file count%s:\n", count_unit_buf);
 573                         if (ret < 0)
 574                                 return ret;
 575                 }
 576                 ret = adu_loop_reverse(dir_table, DT_FILES, &gsi,
 577                         global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
 578                 if (ret < 0)
 579                         return ret;
 580                 ret = output("\n");
 581                 if (ret < 0)
 582                         return ret;
 583         }
 584         if (gla == global_list_arg_none && !select_conf.no_global_summary_given) {
 585                 /* must compute summary */
 586                 gsi.count = select_conf.limit_arg;
 587                 gsi.flags = GSF_COMPUTE_SUMMARY;
 588                 ret = adu_loop_reverse(dir_table, DT_FILES, &gsi,
 589                         global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
 590                 if (ret < 0)
 591                         return ret;
 592         }
 593         return 1;
 594 }
 595
 596 static int print_statistics(struct select_format_info *sli)
 597 {
 598         int ret;
 599
 600         ret = print_global_lists();
 601         if (ret < 0)
 602                 return ret;
 603         ret = print_global_summary();
 604         if (ret < 0)
 605                 return ret;
 606         ret = print_user_lists();
 607         if (ret < 0)
 608                 return ret;
 609         ret = print_user_summary(sli->user_summary_fi);
 610         if (ret < 0)
 611                 return ret;
 612         return 1;
 613 }
 614
 615 static int read_uid_file(struct uid_range *admissible_uids)
 616 {
 617         size_t size;
 618         uint32_t n;
 619         char *filename = get_uid_list_name(), *map;
 620         int ret = mmap_full_file(filename, O_RDONLY, (void **)&map, &size, NULL);
 621         unsigned bits;
 622
 623         if (ret < 0) {
 624                 INFO_LOG("failed to map %s\n", filename);
 625                 free(filename);
 626                 return ret;
 627         }
 628         num_uids = size / 4;
 629         INFO_LOG("found %u uids in %s\n", (unsigned)num_uids, filename);
 630         free(filename);
 631         /*
 632          * Compute number of hash table bits. The hash table size must be a
 633          * power of two and larger than the number of uids.
 634          */
 635         bits = 2;
 636         while (1 << bits < num_uids)
 637                 bits++;
 638         create_hash_table(bits);
 639         for (n = 0; n < num_uids; n++) {
 640                 uint32_t uid = read_u32(map + n * sizeof(uid));
 641                 ret = search_uid(uid, admissible_uids, OPEN_USER_TABLE, NULL);
 642                 if (ret < 0)
 643                         goto out;
 644         }
 645 out:
 646         adu_munmap(map, size);
 647         return ret;
 648 }
 649
 650 int run_select_query(struct uid_range *admissible_uids,
 651                 struct select_format_info *sfi)
 652 {
 653         int ret;
 654
 655         if (select_conf.output_given && strcmp(select_conf.output_arg, "-")) {
 656                 output_file = fopen(select_conf.output_arg, "w");
 657                 if (!output_file)
 658                         return -ERRNO_TO_ERROR(errno);
 659         } else
 660                 output_file = stdout;
 661
 662         if (select_conf.count_unit_arg != count_unit_arg_h)
 663                 count_unit_buf[1] = count_unit_abbrevs[select_conf.count_unit_arg];
 664         else
 665                 count_unit_buf[0] = '\0';
 666         if (select_conf.size_unit_arg != size_unit_arg_h)
 667                 size_unit_buf[1] = size_unit_abbrevs[select_conf.size_unit_arg];
 668         else
 669                 size_unit_buf[0] = '\0';
 670
 671         ret = open_dir_table(0);
 672         if (ret < 0)
 673                 goto out;
 674         check_signals();
 675         ret = read_uid_file(admissible_uids);
 676         if (ret < 0)
 677                 goto out;
 678         check_signals();
 679         ret = print_statistics(sfi);
 680 out:
 681         close_all_tables();
 682         if (output_file != stdout)
 683                 fclose(output_file);
 684         return ret;
 685 }
 686
 687 /* return: < 0: error, >0: OK, == 0: help given */
 688 int parse_select_options(char *string, struct select_cmdline_parser_params *params,
 689                 struct uid_range **admissible_uids, struct select_format_info *sfi)
 690 {
 691         int ret;
 692         const char **line;
 693
 694         if (conf.select_options_given) {
 695                 int argc;
 696                 char **argv;
 697
 698                 ret = create_argv(string, &argv);
 699                 if (ret < 0)
 700                         return ret;
 701                 argc = ret;
 702                 ret = select_cmdline_parser_ext(argc, argv, &select_conf, params);
 703                 free_argv(argv);
 704                 if (ret)
 705                         return -E_SYNTAX;
 706                 if (select_conf.help_given || select_conf.detailed_help_given)
 707                         goto help;
 708
 709         }
 710         ret = parse_uid_arg(select_conf.uid_arg, admissible_uids);
 711         if (ret < 0)
 712                 return ret;
 713         ret = parse_format_string(select_conf.user_summary_format_arg,
 714                 user_summary_atoms, &sfi->user_summary_fi);
 715         if (ret < 0)
 716                 return ret;
 717         return 1;
 718 help:
 719         line = select_conf.detailed_help_given?
 720                 select_args_info_detailed_help : select_args_info_help;
 721         if (!output_file)
 722                 output_file = stdout;
 723         for (; *line; line++) {
 724                 ret = output("%s\n", *line);
 725                 if (ret < 0)
 726                         return ret;
 727         }
 728         return 0;
 729 }
 730
 731 int com_select(void)
 732 {
 733         struct uid_range *admissible_uids = NULL;
 734         struct select_format_info sfi;
 735         int ret;
 736         struct select_cmdline_parser_params params = {
 737                 .override = 1,
 738                 .initialize = 1,
 739                 .check_required = 1,
 740                 .check_ambiguity = 1,
 741                 .print_errors = 1
 742         };
 743
 744         select_cmdline_parser_init(&select_conf);
 745         ret = parse_select_options(conf.select_options_arg, &params,
 746                 &admissible_uids, &sfi);
 747         if (ret <= 0) /* do not run query if help was given */
 748                 return ret;
 749         return run_select_query(admissible_uids, &sfi);
 750 }