152e4b98667c69fe68d5a0a53fb53b2f90b677ab
[adu.git] / 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
121 static FILE *output_file;
122
123 __printf_1_2 static int output(const char const *fmt, ...)
124 {
125 va_list argp;
126 int ret;
127
128 va_start(argp, fmt);
129 ret = vfprintf(output_file, fmt, argp);
130 va_end(argp);
131 return ret < 0? -E_OUTPUT : 1;
132 }
133
134 static int get_dir_name_by_number(uint64_t *dirnum, char **name)
135 {
136 char *result = NULL, *tmp;
137 struct osl_row *row;
138 uint64_t val = *dirnum;
139 struct osl_object obj;
140 int ret;
141 char *pfx;
142
143 again:
144 obj.data = &val;
145 obj.size = sizeof(val);
146 ret = osl(osl_get_row(dir_table, DT_NUM, &obj, &row));
147 if (ret < 0)
148 goto out;
149 ret = osl(osl_get_object(dir_table, row, DT_PARENT_NUM, &obj));
150 if (ret < 0)
151 goto out;
152 val = *(uint64_t *)obj.data;
153 ret = osl(osl_get_object(dir_table, row, DT_NAME, &obj));
154 if (ret < 0)
155 goto out;
156 pfx = (select_conf.print_base_dir_given || val)? (char *)obj.data : ".";
157 tmp = make_message("%s/%s", pfx, result? result : "");
158 free(result);
159 result = tmp;
160 if (val)
161 goto again;
162 out:
163 if (ret < 0) {
164 free(result);
165 *name = NULL;
166 } else {
167 assert(result);
168 *name = result;
169 }
170 return ret;
171 }
172
173 static int get_dir_name_of_row(struct osl_row *dir_table_row, char **name)
174 {
175 struct osl_object obj;
176 int ret;
177
178 *name = NULL;
179 ret = osl(osl_get_object(dir_table, dir_table_row, DT_NUM, &obj));
180 if (ret < 0)
181 return ret;
182 return get_dir_name_by_number((uint64_t *)obj.data, name);
183 }
184
185 static int get_dir_name_of_user_row(struct osl_row *user_table_row,
186 struct user_info *ui, char **dirname)
187 {
188 struct osl_object obj;
189 int ret = osl(osl_get_object(ui->table, user_table_row,
190 UT_DIR_NUM, &obj));
191
192 if (ret < 0)
193 return ret;
194 return get_dir_name_by_number((uint64_t *)obj.data, dirname);
195 }
196
197 static int get_num_files_of_row(struct osl_row *row, uint64_t *num_files)
198 {
199 struct osl_object obj;
200 int ret = osl(osl_get_object(dir_table, row, DT_FILES, &obj));
201 if (ret < 0)
202 return ret;
203 *num_files = *(uint64_t *)obj.data;
204 return 1;
205 }
206
207 static int get_num_user_files(struct osl_row *row, struct user_info *ui,
208 uint64_t *num_files)
209 {
210 struct osl_object obj;
211 int ret = osl(osl_get_object(ui->table, row, UT_FILES, &obj));
212
213 if (ret < 0)
214 return ret;
215 *num_files = *(uint64_t *)obj.data;
216 return 1;
217 }
218
219 static int get_num_bytes_of_row(struct osl_row *row, uint64_t *num_bytes)
220 {
221 struct osl_object obj;
222 int ret = osl(osl_get_object(dir_table, row, DT_BYTES, &obj));
223 if (ret < 0)
224 return ret;
225 *num_bytes = *(uint64_t *)obj.data;
226 return 1;
227 }
228
229 static int get_num_user_bytes(struct osl_row *row, struct user_info *ui,
230 uint64_t *num_bytes)
231 {
232 struct osl_object obj;
233 int ret = osl(osl_get_object(ui->table, row, UT_BYTES, &obj));
234
235 if (ret < 0)
236 return ret;
237 *num_bytes = *(uint64_t *)obj.data;
238 return 1;
239 }
240
241 static int check_loop_return(int ret, int loop_ret, int loop_osl_errno)
242 {
243 if (ret >= 0)
244 return ret;
245 assert(ret == -E_OSL);
246 if (osl_errno != E_OSL_LOOP)
247 /* error not caused by loop function returning negative. */
248 return ret;
249 assert(loop_ret < 0);
250 if (loop_ret == -E_LOOP_COMPLETE) /* no error */
251 return 1;
252 if (loop_ret == -E_OSL) { /* osl error in loop function */
253 assert(loop_osl_errno);
254 osl_errno = loop_osl_errno;
255 }
256 return loop_ret;
257 }
258
259 static int adu_loop_reverse(struct osl_table *t, unsigned col_num, void *private_data,
260 osl_rbtree_loop_func *func, int *loop_ret, int *loop_osl_errno)
261 {
262 int ret = osl(osl_rbtree_loop_reverse(t, col_num, private_data, func));
263 return check_loop_return(ret, *loop_ret, *loop_osl_errno);
264 }
265
266 static int global_summary_loop_function(struct osl_row *row, void *data)
267 {
268 struct global_summary_info *gsi = data;
269 int ret;
270 uint64_t num;
271
272 ret = get_num_files_of_row(row, &num);
273 if (ret < 0)
274 goto err;
275 gsi->num_files += num;
276
277 ret = get_num_bytes_of_row(row, &num);
278 if (ret < 0)
279 goto err;
280 gsi->num_bytes += num;
281 gsi->num_dirs++;
282 return 1;
283 err:
284 gsi->ret = ret;
285 gsi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
286 return ret;
287 }
288
289 static int print_global_summary(struct format_info *fi)
290 {
291 int ret;
292 char *buf;
293 struct global_summary_info gsi = {.num_dirs = 0};
294
295 union atom_value values[] = {
296 [gsa_dirs] = {.num_value = 0ULL},
297 [gsa_files] = {.num_value = 0ULL},
298 [gsa_size] = {.num_value = 0ULL}
299 };
300
301 ret = adu_loop_reverse(dir_table, DT_BYTES, &gsi,
302 global_summary_loop_function, &gsi.ret, &gsi.osl_errno);
303 if (ret < 0)
304 return ret;
305 values[gsa_dirs].num_value = (long long unsigned)gsi.num_dirs;
306 values[gsa_files].num_value = (long long unsigned)gsi.num_files;
307 values[gsa_size].num_value = (long long unsigned)gsi.num_bytes;
308 if (!select_conf.no_headers_given) {
309 ret = output("Global summary\n");
310 if (ret < 0)
311 return ret;
312 }
313 buf = format_items(fi, values);
314 ret = output("%s", buf);
315 free(buf);
316 return ret;
317 }
318
319 static int user_summary_loop_function(struct osl_row *row, void *data)
320 {
321 struct user_summary_info *usi = data;
322 uint64_t num;
323 int ret;
324
325 ret = get_num_user_files(row, usi->ui, &num);
326 if (ret < 0)
327 goto err;
328 usi->ui->files += num;
329 ret = get_num_user_bytes(row, usi->ui, &num);
330 if (ret < 0)
331 goto err;
332 usi->ui->bytes += num;
333 usi->ui->dirs++;
334 return 1;
335 err:
336 usi->ret = ret;
337 usi->osl_errno = (ret == -E_OSL)? osl_errno : 0;
338 return ret;
339 }
340
341 static int compute_user_summary(struct user_info *ui, __a_unused void *data)
342 {
343 struct user_summary_info usi = {.ui = ui};
344
345 return adu_loop_reverse(ui->table, UT_BYTES, &usi, user_summary_loop_function,
346 &usi.ret, &usi.osl_errno);
347 }
348
349 static int print_user_summary_line(struct user_info *ui, void *data)
350 {
351 struct format_info *fi = data;
352 union atom_value values[] = {
353 [usa_pw_name] = {.string_value = ui->pw_name?
354 ui->pw_name : "?"},
355 [usa_uid] = {.num_value = (long long unsigned)ui->uid},
356 [usa_dirs] = {.num_value = (long long unsigned)ui->dirs},
357 [usa_files] = {.num_value = (long long unsigned)ui->files},
358 [usa_size] = {.num_value = (long long unsigned)ui->bytes}
359 };
360 char *buf;
361 int ret;
362
363 buf = format_items(fi, values);
364 ret = output("%s", buf);
365 free(buf);
366 return ret;
367 }
368
369 static int name_comp(const void *a, const void *b)
370 {
371 char *x = ((struct user_info *)a)->pw_name;
372 char *y = ((struct user_info *)b)->pw_name;
373
374 if (!x)
375 return 1;
376 if (!y)
377 return -1;
378 return strcmp(x, y);
379 }
380
381 static int uid_comp(const void *a, const void *b)
382 {
383 return -NUM_COMPARE(((struct user_info *)a)->uid,
384 ((struct user_info *)b)->uid);
385 }
386
387 static int dir_count_comp(const void *a, const void *b)
388 {
389 return NUM_COMPARE(((struct user_info *)a)->dirs,
390 ((struct user_info *)b)->dirs);
391 }
392
393 static int file_count_comp(const void *a, const void *b)
394 {
395 return NUM_COMPARE(((struct user_info *)a)->files,
396 ((struct user_info *)b)->files);
397 }
398
399 static int size_comp(const void *a, const void *b)
400 {
401 return NUM_COMPARE(((struct user_info *)a)->bytes,
402 ((struct user_info *)b)->bytes);
403 }
404
405 static int print_user_summary(struct format_info *fi)
406 {
407 /*
408 * The comparators for sorting the user summary.
409 *
410 * This is an array of pointers to functions taking two constant void *
411 * pointers and returning an int.
412 */
413 static int (*summary_comparators[])(const void *, const void *) = {
414 [user_summary_sort_arg_name] = name_comp,
415 [user_summary_sort_arg_uid] = uid_comp,
416 [user_summary_sort_arg_dir_count] = dir_count_comp,
417 [user_summary_sort_arg_file_count] = file_count_comp,
418 [user_summary_sort_arg_size] = size_comp,
419 };
420
421 if (!select_conf.no_headers_given) {
422 int ret = output("User summary\n");
423 if (ret < 0)
424 return ret;
425 }
426 int ret = for_each_admissible_user(compute_user_summary, fi);
427 if (ret < 0)
428 return ret;
429 sort_hash_table(summary_comparators[select_conf.user_summary_sort_arg]);
430 return for_each_admissible_user(print_user_summary_line, fi);
431 }
432
433 static int user_list_loop_function(struct osl_row *row, void *data)
434 {
435 struct user_list_info *uli = data;
436 union atom_value values[] = {
437 [ula_pw_name] = {.string_value = uli->ui->pw_name?
438 uli->ui->pw_name : "?"},
439 [ula_uid] = {.num_value = (long long unsigned)uli->ui->uid},
440 [ula_files] = {.num_value = 0ULL},
441 [ula_size] = {.num_value = 0ULL},
442 [ula_dirname] = {.string_value = NULL}
443 };
444 uint64_t num;
445 int ret;
446 char *dirname, *buf;
447
448 check_signals();
449 ret = -E_LOOP_COMPLETE;
450 if (!uli->count)
451 goto err;
452
453 ret = get_num_user_files(row, uli->ui, &num);
454 if (ret < 0)
455 goto err;
456 values[ula_files].num_value = num;
457
458 ret = get_num_user_bytes(row, uli->ui, &num);
459 if (ret < 0)
460 goto err;
461 values[ula_size].num_value = num;
462
463 ret = get_dir_name_of_user_row(row, uli->ui, &dirname);
464 if (ret < 0)
465 goto err;
466 values[ula_dirname].string_value = dirname;
467
468 buf = format_items(uli->fi, values);
469 free(dirname);
470 ret = output("%s", buf);
471 free(buf);
472 if (ret < 0)
473 goto err;
474 uli->count--;
475 return ret;
476 err:
477 uli->ret = ret;
478 uli->osl_errno = (ret == -E_OSL)? osl_errno : 0;
479 return ret;
480 }
481
482 static int print_user_list(struct user_info *ui, void *data)
483 {
484 struct format_info *fi = data;
485 int ret;
486 enum user_table_columns sort_column = UT_BYTES;
487 struct user_list_info uli = {
488 .ui = ui,
489 .fi = fi,
490 .count = select_conf.limit_arg
491 };
492
493 if (select_conf.list_sort_arg == list_sort_arg_file_count)
494 sort_column = UT_FILES;
495
496 if (!select_conf.no_headers_given) {
497 ret = output("%s (uid %u)\n",
498 ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid);
499 if (ret < 0)
500 return ret;
501 }
502 return adu_loop_reverse(ui->table, sort_column, &uli, user_list_loop_function,
503 &uli.ret, &uli.osl_errno);
504 }
505
506 static int global_list_loop_function(struct osl_row *row, void *data)
507 {
508 struct global_list_info *gli = data;
509 union atom_value values[] = {
510 [gla_size] = {.num_value = 0ULL},
511 [gla_files] = {.num_value = 0ULL},
512 [gla_dirname] = {.string_value = NULL}
513 };
514 uint64_t num_files, num_bytes;
515 char *dirname, *buf;
516 int ret;
517
518 check_signals();
519 ret = -E_LOOP_COMPLETE;
520 if (!gli->count)
521 goto err;
522
523 ret = get_num_files_of_row(row, &num_files);
524 if (ret < 0)
525 goto err;
526 values[gla_files].num_value = (long long unsigned)num_files;
527
528 ret = get_num_bytes_of_row(row, &num_bytes);
529 if (ret < 0)
530 goto err;
531 values[gla_size].num_value = (long long unsigned)num_bytes;
532
533 ret = get_dir_name_of_row(row, &dirname);
534 if (ret < 0)
535 goto err;
536 values[gla_dirname].string_value = dirname;
537
538 buf = format_items(gli->fi, values);
539 free(dirname);
540 ret = output("%s", buf);
541 free(buf);
542 if (ret < 0)
543 goto err;
544 if (gli->count > 0)
545 gli->count--;
546 return ret;
547 err:
548 gli->ret = ret;
549 gli->osl_errno = (ret == -E_OSL)? osl_errno : 0;
550 return -1;
551 }
552
553 static int print_global_list(struct format_info *fi)
554 {
555 int ret;
556 enum dir_table_columns sort_column = DT_BYTES;
557 struct global_list_info gli = {
558 .fi = fi,
559 .count = select_conf.limit_arg
560 };
561
562 if (!select_conf.no_headers_given) {
563 ret = output("Global list\n");
564 if (ret < 0)
565 return ret;
566 }
567 if (select_conf.list_sort_arg == list_sort_arg_file_count)
568 sort_column = DT_FILES;
569 return adu_loop_reverse(dir_table, sort_column, &gli,
570 global_list_loop_function, &gli.ret, &gli.osl_errno);
571 }
572
573 static int print_statistics(struct format_info *fi)
574 {
575 switch (select_conf.select_mode_arg) {
576 case select_mode_arg_global_list:
577 return print_global_list(fi);
578 case select_mode_arg_global_summary:
579 return print_global_summary(fi);
580 case select_mode_arg_user_list:
581 return for_each_admissible_user(print_user_list, fi);
582 case select_mode_arg_user_summary:
583 return print_user_summary(fi);
584 };
585 ERROR_LOG("bad select mode\n");
586 return -ERRNO_TO_ERROR(-EINVAL);
587 }
588
589 static int open_pipe(char *path)
590 {
591 int p[2], ret, argc;
592 char **argv;
593
594 ret = pipe(p);
595 if (ret < 0)
596 return ERRNO_TO_ERROR(errno);
597 ret = fork();
598 if (ret < 0)
599 return ERRNO_TO_ERROR(errno);
600 if (ret) { /* parent */
601 DEBUG_LOG("created process %d\n", ret);
602 close(p[0]);
603 output_file = fdopen(p[1], "w");
604 if (!output_file)
605 return ERRNO_TO_ERROR(errno);
606 return 1;
607 }
608 close(p[1]);
609 if (p[0] != STDIN_FILENO)
610 dup2(p[0], STDIN_FILENO);
611 DEBUG_LOG("executing %s\n", path);
612 argc = split_args(path, &argv, " \t");
613 execvp(argv[0], argv);
614 ERROR_LOG("error executing %s: %s\n", path,
615 adu_strerror(ERRNO_TO_ERROR(errno)));
616 _exit(EXIT_FAILURE);
617 }
618
619 static int open_output_stream(void)
620 {
621 char *p;
622 int ret, flags = O_WRONLY | O_CREAT;
623
624 if (!select_conf.output_given)
625 goto use_stdout;
626 p = select_conf.output_arg;
627 switch (p[0]) {
628 case '\0': /* empty string */
629 goto bad_output_arg;
630 case '-':
631 if (!p[1]) /* "-" means stdout */
632 goto use_stdout;
633 /* string starting with a dash */
634 flags |= O_EXCL;
635 goto open_file;
636 case '>':
637 if (!p[1]) /* ">" is invalid */
638 goto bad_output_arg;
639 if (p[1] != '>') {
640 p++;
641 flags |= O_TRUNC;
642 goto open_file;
643 }
644 /* string starting with ">>" */
645 if (!p[2]) /* ">>" is invalid */
646 goto bad_output_arg;
647 flags |= O_APPEND;
648 p += 2;
649 goto open_file;
650 case '|':
651 if (!p[1]) /* "|" is invalid */
652 goto bad_output_arg;
653 p++;
654 return open_pipe(p);
655 default: /* args starts with no magic character */
656 flags |= O_EXCL;
657 goto open_file;
658 }
659 use_stdout:
660 output_file = stdout;
661 return 1;
662 bad_output_arg:
663 output_file = NULL;
664 return -E_BAD_OUTPUT_ARG;
665 open_file:
666 /*
667 * glibc's 'x' mode to fopen is not portable, so use open() and
668 * fdopen().
669 */
670 ret = open(p, flags, 0644);
671 if (ret < 0)
672 return -ERRNO_TO_ERROR(errno);
673 output_file = fdopen(ret, "w");
674 if (!output_file)
675 return -ERRNO_TO_ERROR(errno);
676 return 1;
677 }
678
679 int run_select_query(struct uid_range *admissible_uids, struct format_info *fi)
680 {
681 int ret = open_output_stream();
682
683 if (ret < 0)
684 goto out;
685 ret = open_dir_table(0);
686 if (ret < 0)
687 goto out;
688 check_signals();
689 ret = read_uid_file(admissible_uids);
690 if (ret < 0)
691 goto out;
692 check_signals();
693 ret = print_statistics(fi);
694 out:
695 close_all_tables();
696 if (output_file && output_file != stdout) {
697 fclose(output_file);
698 output_file = NULL;
699 }
700 return ret;
701 }
702
703 #define GLOBAL_LIST_DFLT_FMT "%(size:r:8) %(files:r:8) %(dirname)\n"
704 #define GLOBAL_SUMMARY_DFLT_FMT "#directories: %(dirs), #files: %(files), size: %(size)\n\n"
705 #define USER_LIST_DFLT_FMT "%(size:r:5) %(files:r:5) %(dirname)\n"
706 #define USER_SUMMARY_DFLT_FMT "%(pw_name:l:16) %(uid:r:5) %(dirs:r:5) %(files:r:5) %(size:r:5)\n"
707
708 static int setup_format_string(char *fmt, struct format_info **fi)
709 {
710 struct atom *atoms;
711
712 if (!fmt)
713 INFO_LOG("using default format string\n");
714 switch (select_conf.select_mode_arg) {
715 case select_mode_arg_global_list:
716 if (!fmt)
717 fmt = GLOBAL_LIST_DFLT_FMT;
718 atoms = global_list_atoms;
719 break;
720 case select_mode_arg_global_summary:
721 if (!fmt)
722 fmt = GLOBAL_SUMMARY_DFLT_FMT;
723 atoms = global_summary_atoms;
724 break;
725 case select_mode_arg_user_list:
726 if (!fmt)
727 fmt = USER_LIST_DFLT_FMT;
728 atoms = user_list_atoms;
729 break;
730 case select_mode_arg_user_summary:
731 if (!fmt)
732 fmt = USER_SUMMARY_DFLT_FMT;
733 atoms = user_summary_atoms;
734 break;
735 default:
736 ERROR_LOG("bad select mode\n");
737 return -ERRNO_TO_ERROR(-EINVAL);
738 };
739 INFO_LOG("format string: %s\n", fmt);
740 return parse_format_string(fmt, atoms, fi);
741 }
742
743 /* return: < 0: error, >0: OK, == 0: help given */
744 int parse_select_options(char *string, struct select_cmdline_parser_params *params,
745 struct uid_range **admissible_uids, struct format_info **fi)
746 {
747 int ret, num_uid_ranges;
748 const char **line;
749 char *fmt = NULL;
750
751 if (string) {
752 int argc;
753 char **argv;
754
755 ret = create_argv(string, &argv);
756 if (ret < 0)
757 return ret;
758 argc = ret;
759 ret = select_cmdline_parser_ext(argc, argv, &select_conf, params);
760 free_argv(argv);
761 if (ret)
762 return -E_SYNTAX;
763 if (select_conf.help_given || select_conf.detailed_help_given)
764 goto help;
765 fmt = select_conf.format_arg;
766 }
767 ret = parse_uid_arg(select_conf.uid_arg, admissible_uids);
768 if (ret < 0)
769 return ret;
770 num_uid_ranges = ret;
771 ret = append_users(select_conf.user_arg, select_conf.user_given,
772 admissible_uids, num_uid_ranges);
773 if (ret < 0)
774 return ret;
775 return setup_format_string(fmt, fi);
776 help:
777 line = select_conf.detailed_help_given?
778 select_args_info_detailed_help : select_args_info_help;
779 if (!output_file)
780 output_file = stdout;
781 for (; *line; line++) {
782 ret = output("%s\n", *line);
783 if (ret < 0)
784 return ret;
785 }
786 return 0;
787 }
788
789 int com_select(void)
790 {
791 struct uid_range *admissible_uids = NULL;
792 int ret;
793 struct format_info *fi;
794 struct select_cmdline_parser_params params = {
795 .override = 1,
796 .initialize = 1,
797 .check_required = 1,
798 .check_ambiguity = 1,
799 .print_errors = 1
800 };
801
802 select_cmdline_parser_init(&select_conf);
803 ret = parse_select_options(conf.select_options_arg, &params,
804 &admissible_uids, &fi);
805 if (ret <= 0) /* do not run query if help was given */
806 return ret;
807 ret = run_select_query(admissible_uids, fi);
808 free_format_info(fi);
809 return ret;
810 }