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 "user.h"
  18 #include "select.cmdline.h"
  19
  20 /* global list */
  21 #define GLOBAL_LIST_ATOMS \
  22         ATOM(size, SIZE) \
  23         ATOM(files, COUNT) \
  24         ATOM(dirname, STRING) \
  25
  26 #define ATOM(x, y) { .name = #x, .type = AT_ ## y},
  27 struct atom global_list_atoms[] = {
  28         GLOBAL_LIST_ATOMS
  29         {.name = NULL}
  30 };
  31 #undef ATOM
  32 #define ATOM(x, y) gla_ ## x,
  33 enum global_list_atoms {GLOBAL_LIST_ATOMS};
  34 #undef ATOM
  35
  36 /* global summary */
  37 #define GLOBAL_SUMMARY_ATOMS \
  38         ATOM(dirs, COUNT) \
  39         ATOM(files, COUNT) \
  40         ATOM(size, SIZE)
  41
  42 #define ATOM(x, y) { .name = #x, .type = AT_ ## y},
  43 struct atom global_summary_atoms[] = {
  44         GLOBAL_SUMMARY_ATOMS
  45         {.name = NULL}
  46 };
  47 #undef ATOM
  48 #define ATOM(x, y) gsa_ ## x,
  49 enum global_summary_atoms {GLOBAL_SUMMARY_ATOMS};
  50 #undef ATOM
  51
  52 /* user list */
  53 #define USER_LIST_ATOMS \
  54         ATOM(pw_name, STRING) \
  55         ATOM(uid, ID) \
  56         ATOM(size, SIZE) \
  57         ATOM(files, COUNT) \
  58         ATOM(dirname, STRING) \
  59
  60 #define ATOM(x, y) { .name = #x, .type = AT_ ## y},
  61 struct atom user_list_atoms[] = {
  62         USER_LIST_ATOMS
  63         {.name = NULL}
  64 };
  65 #undef ATOM
  66 #define ATOM(x, y) ula_ ## x,
  67 enum user_list_atoms {USER_LIST_ATOMS};
  68 #undef ATOM
  69
  70 /* user summary */
  71 #define USER_SUMMARY_ATOMS \
  72         ATOM(pw_name, STRING) \
  73         ATOM(uid, ID) \
  74         ATOM(dirs, COUNT) \
  75         ATOM(files, COUNT) \
  76         ATOM(size, SIZE)
  77
  78 #define ATOM(x, y) { .name = #x, .type = AT_ ## y},
  79 struct atom user_summary_atoms[] = {
  80         USER_SUMMARY_ATOMS
  81         {.name = NULL}
  82 };
  83 #undef ATOM
  84 #define ATOM(x, y) usa_ ## x,
  85 enum user_summary_atoms {USER_SUMMARY_ATOMS};
  86 #undef ATOM
  87
  88 struct global_list_info {
  89         uint32_t count;
  90         int ret;
  91         int osl_errno;
  92         struct format_info *fi;
  93 };
  94
  95 struct global_summary_info {
  96         /** Global dir count. */
  97         uint64_t num_dirs;
  98         /** Global files count. */
  99         uint64_t num_files;
 100         /** Global bytes count. */
 101         uint64_t num_bytes;
 102         int ret;
 103         int osl_errno;
 104 };
 105
 106 struct user_list_info {
 107         uint32_t count;
 108         struct user_info *ui;
 109         struct format_info *fi;
 110         int ret;
 111         int osl_errno;
 112 };
 113
 114 struct user_summary_info {
 115         struct user_info *ui;
 116         int ret;
 117         int osl_errno;
 118 };
 119
 120 struct user_summary_line_info {
 121         struct format_info *fi;
 122         uint32_t count;
 123 };
 124
 125 static FILE *output_file;
 126
 127 __printf_1_2 static int output(const char const *fmt, ...)
 128 {
 129         va_list argp;
 130         int ret;
 131
 132         va_start(argp, fmt);
 133         ret = vfprintf(output_file, fmt, argp);
 134         va_end(argp);
 135         return ret < 0? -E_OUTPUT : 1;
 136 }
 137
 138 static int get_dir_name_by_number(uint64_t *dirnum, char **name)
 139 {
 140         char *result = NULL, *tmp;
 141         struct osl_row *row;
 142         uint64_t val = *dirnum;
 143         struct osl_object obj;
 144         int ret;
 145         char *pfx;
 146
 147 again:
 148         obj.data = &val;
 149         obj.size = sizeof(val);
 150         ret = osl(osl_get_row(dir_table, DT_NUM, &obj, &row));
 151         if (ret < 0)
 152                 goto out;
 153         ret = osl(osl_get_object(dir_table, row, DT_PARENT_NUM, &obj));
 154         if (ret < 0)
 155                 goto out;
 156         val = *(uint64_t *)obj.data;
 157         ret = osl(osl_get_object(dir_table, row, DT_NAME, &obj));
 158         if (ret < 0)
 159                 goto out;
 160         pfx = (select_conf.print_base_dir_given || val)? (char *)obj.data :  ".";
 161         tmp = make_message("%s/%s", pfx, result? result : "");
 162         free(result);
 163         result = tmp;
 164         if (val)
 165                 goto again;
 166 out:
 167         if (ret < 0) {
 168                 free(result);
 169                 *name = NULL;
 170         } else {
 171                 assert(result);
 172                 *name = result;
 173         }
 174         return ret;
 175 }
 176
 177 static int get_dir_name_of_row(struct osl_row *dir_table_row, char **name)
 178 {
 179         struct osl_object obj;
 180         int ret;
 181
 182         *name = NULL;
 183         ret = osl(osl_get_object(dir_table, dir_table_row, DT_NUM, &obj));
 184         if (ret < 0)
 185                 return ret;
 186         return get_dir_name_by_number((uint64_t *)obj.data, name);
 187 }
 188
 189 static int get_dir_name_of_user_row(struct osl_row *user_table_row,
 190                 struct user_info *ui, char **dirname)
 191 {
 192         struct osl_object obj;
 193         int ret = osl(osl_get_object(ui->table, user_table_row,
 194                 UT_DIR_NUM, &obj));
 195
 196         if (ret < 0)
 197                 return ret;
 198         return get_dir_name_by_number((uint64_t *)obj.data, dirname);
 199 }
 200
 201 static int get_num_files_of_row(struct osl_row *row, uint64_t *num_files)
 202 {
 203         struct osl_object obj;
 204         int ret = osl(osl_get_object(dir_table, row, DT_FILES, &obj));
 205         if (ret < 0)
 206                 return ret;
 207         *num_files = *(uint64_t *)obj.data;
 208         return 1;
 209 }
 210
 211 static int get_num_user_files(struct osl_row *row, struct user_info *ui,
 212                 uint64_t *num_files)
 213 {
 214         struct osl_object obj;
 215         int ret = osl(osl_get_object(ui->table, row, UT_FILES, &obj));
 216
 217         if (ret < 0)
 218                 return ret;
 219         *num_files = *(uint64_t *)obj.data;
 220         return 1;
 221 }
 222
 223 static int get_num_bytes_of_row(struct osl_row *row, uint64_t *num_bytes)
 224 {
 225         struct osl_object obj;
 226         int ret = osl(osl_get_object(dir_table, row, DT_BYTES, &obj));
 227         if (ret < 0)
 228                 return ret;
 229         *num_bytes = *(uint64_t *)obj.data;
 230         return 1;
 231 }
 232
 233 static int get_num_user_bytes(struct osl_row *row, struct user_info *ui,
 234                 uint64_t *num_bytes)
 235 {
 236         struct osl_object obj;
 237         int ret = osl(osl_get_object(ui->table, row, UT_BYTES, &obj));
 238
 239         if (ret < 0)
 240                 return ret;
 241         *num_bytes = *(uint64_t *)obj.data;
 242         return 1;
 243 }
 244
 245 static int check_loop_return(int ret, int loop_ret, int loop_osl_errno)
 246 {
 247         if (ret >= 0)
 248                 return ret;
 249         assert(ret == -E_OSL);
 250         if (osl_errno != E_OSL_LOOP)
 251                 /* error not caused by loop function returning negative. */
 252                 return ret;
 253         assert(loop_ret < 0);
 254         if (loop_ret == -E_LOOP_COMPLETE) /* no error */
 255                 return 1;
 256         if (loop_ret == -E_OSL) { /* osl error in loop function */
 257                 assert(loop_osl_errno);
 258                 osl_errno = loop_osl_errno;
 259         }
 260         return loop_ret;
 261 }
 262
 263 static int adu_loop_reverse(struct osl_table *t, unsigned col_num, void *private_data,
 264                 osl_rbtree_loop_func *func, int *loop_ret, int *loop_osl_errno)
 265 {
 266         int ret = osl(osl_rbtree_loop_reverse(t, col_num, private_data, func));
 267         return check_loop_return(ret, *loop_ret, *loop_osl_errno);
 268 }
 269
 270 static int global_summary_loop_function(struct osl_row *row, void *data)
 271 {
 272         struct global_summary_info *gsi = data;
 273         int ret;
 274         uint64_t num;
 275
 276         ret = get_num_files_of_row(row, &num);
 277         if (ret < 0)
 278                 goto err;
 279         gsi->num_files += num;
 280
 281         ret = get_num_bytes_of_row(row, &num);
 282         if (ret < 0)
 283                 goto err;
 284         gsi->num_bytes += num;
 285         gsi->num_dirs++;
 286         return 1;
 287 err:
 288         gsi->ret = ret;
 289         gsi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
 290         return ret;
 291 }
 292
 293 static int print_global_summary(struct format_info *fi)
 294 {
 295         int ret;
 296         char *buf;
 297         struct global_summary_info gsi = {.num_dirs = 0};
 298
 299         union atom_value values[] = {
 300                 [gsa_dirs] = {.num_value = 0ULL},
 301                 [gsa_files] = {.num_value =  0ULL},
 302                 [gsa_size] = {.num_value =  0ULL}
 303         };
 304
 305         ret = adu_loop_reverse(dir_table, DT_BYTES, &gsi,
 306                 global_summary_loop_function, &gsi.ret, &gsi.osl_errno);
 307         if (ret < 0)
 308                 return ret;
 309         values[gsa_dirs].num_value = (long long unsigned)gsi.num_dirs;
 310         values[gsa_files].num_value = (long long unsigned)gsi.num_files;
 311         values[gsa_size].num_value = (long long unsigned)gsi.num_bytes;
 312         if (!select_conf.no_headers_given) {
 313                 ret = output("Global summary\n");
 314                 if (ret < 0)
 315                         return ret;
 316         }
 317         buf = format_items(fi, values);
 318         ret = output("%s", buf);
 319         free(buf);
 320         return ret;
 321 }
 322
 323 static int user_summary_loop_function(struct osl_row *row, void *data)
 324 {
 325         struct user_summary_info *usi = data;
 326         uint64_t num;
 327         int ret;
 328
 329         ret = get_num_user_files(row, usi->ui, &num);
 330         if (ret < 0)
 331                 goto err;
 332         usi->ui->files += num;
 333         ret = get_num_user_bytes(row, usi->ui, &num);
 334         if (ret < 0)
 335                 goto err;
 336         usi->ui->bytes += num;
 337         usi->ui->dirs++;
 338         return 1;
 339 err:
 340         usi->ret = ret;
 341         usi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
 342         return ret;
 343 }
 344
 345 static int compute_user_summary(struct user_info *ui, __a_unused void *data)
 346 {
 347         struct user_summary_info usi = {.ui = ui};
 348
 349         return adu_loop_reverse(ui->table, UT_BYTES, &usi, user_summary_loop_function,
 350                 &usi.ret, &usi.osl_errno);
 351 }
 352
 353 static int print_user_summary_line(struct user_info *ui, void *data)
 354 {
 355         struct user_summary_line_info *usli = data;
 356         union atom_value values[] = {
 357                 [usa_pw_name] = {.string_value = ui->pw_name?
 358                         ui->pw_name : "?"},
 359                 [usa_uid] = {.num_value = (long long unsigned)ui->uid},
 360                 [usa_dirs] = {.num_value = (long long unsigned)ui->dirs},
 361                 [usa_files] = {.num_value = (long long unsigned)ui->files},
 362                 [usa_size] = {.num_value =  (long long unsigned)ui->bytes}
 363         };
 364         char *buf;
 365         int ret = -E_LOOP_COMPLETE;
 366
 367         if (!usli->count)
 368                 return ret;
 369
 370         buf = format_items(usli->fi, values);
 371         ret = output("%s", buf);
 372         free(buf);
 373         usli->count--;
 374         return ret;
 375 }
 376
 377 static int name_comp(struct user_info *a, struct user_info *b)
 378 {
 379         char *x = a->pw_name;
 380         char *y = b->pw_name;
 381
 382         if (!x)
 383                 return 1;
 384         if (!y)
 385                 return -1;
 386         return strcmp(x, y);
 387 }
 388
 389 static int uid_comp(struct user_info *a, struct user_info *b)
 390 {
 391         return -NUM_COMPARE(a->uid, b->uid);
 392 }
 393
 394 static int dir_count_comp(struct user_info *a, struct user_info *b)
 395 {
 396         return NUM_COMPARE(a->dirs, b->dirs);
 397 }
 398
 399 static int file_count_comp(struct user_info *a, struct user_info *b)
 400 {
 401         return NUM_COMPARE(a->files, b->files);
 402 }
 403
 404 static int size_comp(struct user_info *a, struct user_info *b)
 405 {
 406         return NUM_COMPARE(a->bytes, b->bytes);
 407 }
 408
 409 static int print_user_summary(struct format_info *fi)
 410 {
 411         int ret;
 412         int (*comp)(struct user_info *a, struct user_info *b);
 413         struct user_summary_line_info usli = {
 414                 .fi = fi,
 415                 .count = select_conf.limit_arg
 416         };
 417
 418         if (!select_conf.no_headers_given) {
 419                 ret = output("User summary\n");
 420                 if (ret < 0)
 421                         return ret;
 422         }
 423         ret = for_each_admissible_user(compute_user_summary, NULL);
 424         if (ret < 0)
 425                 return ret;
 426         switch (select_conf.user_summary_sort_arg) {
 427         case user_summary_sort_arg_name:
 428                 comp = name_comp;
 429                 break;
 430         case user_summary_sort_arg_uid:
 431                 comp = uid_comp;
 432                 break;
 433         case user_summary_sort_arg_dir_count:
 434                 comp = dir_count_comp;
 435                 break;
 436         case user_summary_sort_arg_file_count:
 437                 comp = file_count_comp;
 438                 break;
 439         case user_summary_sort_arg_size:
 440                 comp = size_comp;
 441                 break;
 442         }
 443         sort_hash_table(comp);
 444         ret = for_each_admissible_user(print_user_summary_line, &usli);
 445         if (ret == -E_LOOP_COMPLETE)
 446                 ret = 1;
 447         return ret;
 448 }
 449
 450 static int user_list_loop_function(struct osl_row *row, void *data)
 451 {
 452         struct user_list_info *uli = data;
 453         union atom_value values[] = {
 454                 [ula_pw_name] = {.string_value = uli->ui->pw_name?
 455                         uli->ui->pw_name : "?"},
 456                 [ula_uid] = {.num_value = (long long unsigned)uli->ui->uid},
 457                 [ula_files] = {.num_value = 0ULL},
 458                 [ula_size] = {.num_value =  0ULL},
 459                 [ula_dirname] = {.string_value = NULL}
 460         };
 461         uint64_t num;
 462         int ret;
 463         char *dirname, *buf;
 464
 465         check_signals();
 466         ret = -E_LOOP_COMPLETE;
 467         if (!uli->count)
 468                 goto err;
 469
 470         ret = get_num_user_files(row, uli->ui, &num);
 471         if (ret < 0)
 472                 goto err;
 473         values[ula_files].num_value = num;
 474
 475         ret = get_num_user_bytes(row, uli->ui, &num);
 476         if (ret < 0)
 477                 goto err;
 478         values[ula_size].num_value = num;
 479
 480         ret = get_dir_name_of_user_row(row, uli->ui, &dirname);
 481         if (ret < 0)
 482                 goto err;
 483         values[ula_dirname].string_value = dirname;
 484
 485         buf = format_items(uli->fi, values);
 486         free(dirname);
 487         ret = output("%s", buf);
 488         free(buf);
 489         if (ret < 0)
 490                 goto err;
 491         uli->count--;
 492         return ret;
 493 err:
 494         uli->ret = ret;
 495         uli->osl_errno = (ret == -E_OSL)? osl_errno : 0;
 496         return ret;
 497 }
 498
 499 static int print_user_list(struct user_info *ui, void *data)
 500 {
 501         struct format_info *fi = data;
 502         int ret;
 503         enum user_table_columns sort_column = UT_BYTES;
 504         struct user_list_info uli = {
 505                 .ui = ui,
 506                 .fi = fi,
 507                 .count = select_conf.limit_arg
 508         };
 509
 510         if (select_conf.list_sort_arg == list_sort_arg_file_count)
 511                 sort_column = UT_FILES;
 512
 513         if (!select_conf.no_headers_given) {
 514                 ret = output("%s (uid %u)\n",
 515                         ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid);
 516                 if (ret < 0)
 517                         return ret;
 518         }
 519         return adu_loop_reverse(ui->table, sort_column, &uli, user_list_loop_function,
 520                 &uli.ret, &uli.osl_errno);
 521 }
 522
 523 static int global_list_loop_function(struct osl_row *row, void *data)
 524 {
 525         struct global_list_info *gli = data;
 526         union atom_value values[] = {
 527                 [gla_size] = {.num_value = 0ULL},
 528                 [gla_files] = {.num_value =  0ULL},
 529                 [gla_dirname] = {.string_value = NULL}
 530         };
 531         uint64_t num_files, num_bytes;
 532         char *dirname, *buf;
 533         int ret;
 534
 535         check_signals();
 536         ret = -E_LOOP_COMPLETE;
 537         if (!gli->count)
 538                 goto err;
 539
 540         ret = get_num_files_of_row(row, &num_files);
 541         if (ret < 0)
 542                 goto err;
 543         values[gla_files].num_value = (long long unsigned)num_files;
 544
 545         ret = get_num_bytes_of_row(row, &num_bytes);
 546         if (ret < 0)
 547                 goto err;
 548         values[gla_size].num_value = (long long unsigned)num_bytes;
 549
 550         ret = get_dir_name_of_row(row, &dirname);
 551         if (ret < 0)
 552                 goto err;
 553         values[gla_dirname].string_value = dirname;
 554
 555         buf = format_items(gli->fi, values);
 556         free(dirname);
 557         ret = output("%s", buf);
 558         free(buf);
 559         if (ret < 0)
 560                 goto err;
 561         if (gli->count > 0)
 562                 gli->count--;
 563         return ret;
 564 err:
 565         gli->ret = ret;
 566         gli->osl_errno = (ret == -E_OSL)? osl_errno : 0;
 567         return -1;
 568 }
 569
 570 static int print_global_list(struct format_info *fi)
 571 {
 572         int ret;
 573         enum dir_table_columns sort_column = DT_BYTES;
 574         struct global_list_info gli = {
 575                 .fi = fi,
 576                 .count = select_conf.limit_arg
 577         };
 578
 579         if (!select_conf.no_headers_given) {
 580                 ret = output("Global list\n");
 581                 if (ret < 0)
 582                         return ret;
 583         }
 584         if (select_conf.list_sort_arg == list_sort_arg_file_count)
 585                 sort_column = DT_FILES;
 586         return adu_loop_reverse(dir_table, sort_column, &gli,
 587                 global_list_loop_function, &gli.ret, &gli.osl_errno);
 588 }
 589
 590 static int print_statistics(struct format_info *fi)
 591 {
 592         switch (select_conf.select_mode_arg) {
 593                 case select_mode_arg_global_list:
 594                         return print_global_list(fi);
 595                 case select_mode_arg_global_summary:
 596                         return print_global_summary(fi);
 597                 case select_mode_arg_user_list:
 598                         return for_each_admissible_user(print_user_list, fi);
 599                 case select_mode_arg_user_summary:
 600                         return print_user_summary(fi);
 601         };
 602         ERROR_LOG("bad select mode\n");
 603         return -ERRNO_TO_ERROR(EINVAL);
 604 }
 605
 606 static int open_pipe(char *path)
 607 {
 608         int p[2], ret, argc;
 609         char **argv;
 610
 611         ret = pipe(p);
 612         if (ret < 0)
 613                 return ERRNO_TO_ERROR(errno);
 614         ret = fork();
 615         if (ret < 0)
 616                 return ERRNO_TO_ERROR(errno);
 617         if (ret) { /* parent */
 618                 DEBUG_LOG("created process %d\n", ret);
 619                 close(p[0]);
 620                 output_file = fdopen(p[1], "w");
 621                 if (!output_file)
 622                         return ERRNO_TO_ERROR(errno);
 623                 return 1;
 624         }
 625         close(p[1]);
 626         if (p[0] != STDIN_FILENO)
 627                 dup2(p[0], STDIN_FILENO);
 628         DEBUG_LOG("executing %s\n", path);
 629         argc = split_args(path, &argv, " \t");
 630         execvp(argv[0], argv);
 631         ERROR_LOG("error executing %s: %s\n", path,
 632                 adu_strerror(ERRNO_TO_ERROR(errno)));
 633         _exit(EXIT_FAILURE);
 634 }
 635
 636 static int open_output_stream(void)
 637 {
 638         char *p;
 639         int ret, flags = O_WRONLY | O_CREAT;
 640
 641         if (!select_conf.output_given)
 642                 goto use_stdout;
 643         p = select_conf.output_arg;
 644         switch (p[0]) {
 645         case '\0': /* empty string */
 646                 goto bad_output_arg;
 647         case '-':
 648                 if (!p[1]) /* "-" means stdout */
 649                         goto use_stdout;
 650                 /* string starting with a dash */
 651                 flags |= O_EXCL;
 652                 goto open_file;
 653         case '>':
 654                 if (!p[1]) /* ">" is invalid */
 655                         goto bad_output_arg;
 656                 if (p[1] != '>') {
 657                         p++;
 658                         flags |= O_TRUNC;
 659                         goto open_file;
 660                 }
 661                 /* string starting with ">>" */
 662                 if (!p[2]) /* ">>" is invalid */
 663                         goto bad_output_arg;
 664                 flags |= O_APPEND;
 665                 p += 2;
 666                 goto open_file;
 667         case '|':
 668                 if (!p[1]) /* "|" is invalid */
 669                         goto bad_output_arg;
 670                 p++;
 671                 return open_pipe(p);
 672         default: /* args starts with no magic character */
 673                 flags |= O_EXCL;
 674                 goto open_file;
 675         }
 676 use_stdout:
 677         output_file = stdout;
 678         return 1;
 679 bad_output_arg:
 680         output_file = NULL;
 681         return -E_BAD_OUTPUT_ARG;
 682 open_file:
 683         /*
 684          * glibc's 'x' mode to fopen is not portable, so use open() and
 685          * fdopen().
 686          */
 687         ret = open(p, flags, 0644);
 688         if (ret < 0)
 689                 return -ERRNO_TO_ERROR(errno);
 690         output_file = fdopen(ret, "w");
 691         if (!output_file)
 692                 return -ERRNO_TO_ERROR(errno);
 693         return 1;
 694 }
 695
 696 int run_select_query(struct uid_range *admissible_uids, struct format_info *fi)
 697 {
 698         int ret = open_output_stream();
 699
 700         if (ret < 0)
 701                 goto out;
 702         ret = open_dir_table(0);
 703         if (ret < 0)
 704                 goto out;
 705         check_signals();
 706         ret = open_admissible_user_tables(admissible_uids);
 707         if (ret < 0)
 708                 goto out;
 709         check_signals();
 710         ret = print_statistics(fi);
 711 out:
 712         if (output_file && output_file != stdout) {
 713                 fclose(output_file);
 714                 output_file = NULL;
 715         }
 716         return ret;
 717 }
 718
 719 #define GLOBAL_LIST_DFLT_FMT "%(size:r:8) %(files:r:8) %(dirname)\n"
 720 #define GLOBAL_SUMMARY_DFLT_FMT "#directories: %(dirs), #files: %(files), size: %(size)\n\n"
 721 #define USER_LIST_DFLT_FMT "%(size:r:5) %(files:r:5) %(dirname)\n"
 722 #define USER_SUMMARY_DFLT_FMT "%(pw_name:l:16) %(uid:r:5) %(dirs:r:5) %(files:r:5) %(size:r:5)\n"
 723
 724 static int setup_format_string(char *fmt, struct format_info **fi)
 725 {
 726         struct atom *atoms;
 727
 728         if (!fmt)
 729                 INFO_LOG("using default format string\n");
 730         switch (select_conf.select_mode_arg) {
 731         case select_mode_arg_global_list:
 732                 if (!fmt)
 733                         fmt = GLOBAL_LIST_DFLT_FMT;
 734                 atoms = global_list_atoms;
 735                 break;
 736         case select_mode_arg_global_summary:
 737                 if (!fmt)
 738                         fmt = GLOBAL_SUMMARY_DFLT_FMT;
 739                 atoms = global_summary_atoms;
 740                 break;
 741         case select_mode_arg_user_list:
 742                 if (!fmt)
 743                         fmt = USER_LIST_DFLT_FMT;
 744                 atoms = user_list_atoms;
 745                 break;
 746         case select_mode_arg_user_summary:
 747                 if (!fmt)
 748                         fmt = USER_SUMMARY_DFLT_FMT;
 749                 atoms = user_summary_atoms;
 750                 break;
 751         default:
 752                 ERROR_LOG("bad select mode\n");
 753                 return -ERRNO_TO_ERROR(EINVAL);
 754         };
 755         INFO_LOG("format string: %s\n", fmt);
 756         return parse_format_string(fmt, atoms, fi);
 757 }
 758
 759 /* return: < 0: error, >0: OK, == 0: help given */
 760 int parse_select_options(char *string, struct select_cmdline_parser_params *params,
 761                 struct uid_range **admissible_uids, struct format_info **fi)
 762 {
 763         int ret, num_uid_ranges;
 764         const char **line;
 765         char *fmt = NULL;
 766
 767         if (string) {
 768                 int argc;
 769                 char **argv;
 770
 771                 ret = create_argv(string, &argv);
 772                 if (ret < 0)
 773                         return ret;
 774                 argc = ret;
 775                 ret = select_cmdline_parser_ext(argc, argv, &select_conf, params);
 776                 free_argv(argv);
 777                 if (ret)
 778                         return -E_SYNTAX;
 779                 if (select_conf.help_given || select_conf.detailed_help_given)
 780                         goto help;
 781                 fmt = select_conf.format_arg;
 782         }
 783         ret = parse_uid_arg(select_conf.uid_arg, admissible_uids);
 784         if (ret < 0)
 785                 return ret;
 786         num_uid_ranges = ret;
 787         ret = append_users(select_conf.user_arg, select_conf.user_given,
 788                 admissible_uids, num_uid_ranges);
 789         if (ret < 0)
 790                 return ret;
 791         return setup_format_string(fmt, fi);
 792 help:
 793         line = select_conf.detailed_help_given?
 794                 select_args_info_detailed_help : select_args_info_help;
 795         if (!output_file)
 796                 output_file = stdout;
 797         for (; *line; line++) {
 798                 ret = output("%s\n", *line);
 799                 if (ret < 0)
 800                         return ret;
 801         }
 802         return 0;
 803 }
 804
 805 int com_select(void)
 806 {
 807         struct uid_range *admissible_uids = NULL;
 808         int ret;
 809         struct format_info *fi;
 810         struct select_cmdline_parser_params params = {
 811                 .override = 1,
 812                 .initialize = 1,
 813                 .check_required = 1,
 814                 .check_ambiguity = 1,
 815                 .print_errors = 1
 816         };
 817
 818         ret = parse_select_options(conf.select_options_arg, &params,
 819                 &admissible_uids, &fi);
 820         if (ret > 0) {
 821                 ret = read_uid_file();
 822                 if (ret < 0)
 823                         goto out;
 824                 ret = run_select_query(admissible_uids, fi);
 825                 free_format_info(fi);
 826         }
 827 out:
 828         select_cmdline_parser_free(&select_conf);
 829         return ret;
 830 }