rb79-delete-post.c

   1 /*
   2  * Copyright (c) 2017-2020, De Rais <derais@cock.li>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for
   5  * any purpose with or without fee is hereby granted, provided that the
   6  * above copyright notice and this permission notice appear in all
   7  * copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
  10  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
  11  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
  12  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  13  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  14  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  15  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16  * PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #include <errno.h>
  19 #include <locale.h>
  20 #include <stdint.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include <sodium.h>
  26
  27 #include "macros.h"
  28 #include "rb79.h"
  29
  30 #include "config.h"
  31
  32 const char *program_name = "rb79-delete-post";
  33
  34 /* Show usage message, do not exit */
  35 void
  36 usage(void)
  37 {
  38         size_t len = strlen(program_name);
  39
  40         printf("Usage: %s -b board-name\n", program_name);
  41         printf("       %*s -p post-id\n", (int) len, "");
  42 }
  43
  44 /* Do the thing */
  45 int
  46 main(int argc, char **argv)
  47 {
  48         int ret = EINVAL;
  49         struct configuration conf = { 0 };
  50         int opt = 0;
  51         const char *b_arg = 0;
  52         size_t board_idx = 0;
  53         const char *p_arg = 0;
  54         uintmax_t post_id = 0;
  55         uint_fast8_t actually_is_op = 0;
  56
  57         setlocale(LC_ALL, "");
  58
  59         /* Parse options */
  60         while ((opt = getopt(argc, argv, "b:p:")) != -1) {
  61                 switch (opt) {
  62                 case 'b':
  63
  64                         if (b_arg) {
  65                                 ERROR_MESSAGE("-b already specified");
  66                                 goto done;
  67                         }
  68
  69                         b_arg = optarg;
  70                         break;
  71                 case 'p':
  72
  73                         if (p_arg) {
  74                                 ERROR_MESSAGE("-p already specified");
  75                                 goto done;
  76                         }
  77
  78                         p_arg = optarg;
  79                         break;
  80                 default:
  81                         usage();
  82                         goto done;
  83                 }
  84         }
  85
  86         if (!b_arg ||
  87             !p_arg) {
  88                 usage();
  89                 goto done;
  90         }
  91
  92         conf = (struct configuration) {
  93                 /* */
  94                 .static_www_folder = static_www_folder,             /* */
  95                 .work_path = work_path,                             /* */
  96                 .temp_dir_template = temp_dir_template,             /* */
  97                 .trip_salt = trip_salt,                             /* */
  98                 .trip_salt_len = strlen(trip_salt),                 /* */
  99                 .boards = boards,                                   /* */
 100                 .boards_num = NUM_OF(boards),                       /* */
 101                 .max_form_data_size = max_form_data_size,           /* */
 102                 .max_file_size = max_file_size,                     /* */
 103                 .max_text_len = max_text_len,                       /* */
 104                 .filetypes = filetypes,                             /* */
 105                 .filetypes_num = NUM_OF(filetypes),                 /* */
 106                 .file_description_prog = file_description_prog,     /* */
 107                 .headers = headers,                                 /* */
 108                 .headers_num = NUM_OF(headers),                     /* */
 109                 .challenges = challenges,                           /* */
 110                 .challenges_num = NUM_OF(challenges),               /* */
 111                 .wordfilter_inputs = wordfilter_inputs,             /* */
 112                 .wordfilter_inputs_num = NUM_OF(wordfilter_inputs), /* */
 113                 .forbidden_inputs = forbidden_inputs,               /* */
 114                 .forbidden_inputs_num = NUM_OF(forbidden_inputs),   /* */
 115         };
 116
 117         /* Interpret board */
 118         board_idx = (size_t) -1;
 119
 120         for (size_t j = 0; j < conf.boards_num; ++j) {
 121                 if (!strcmp(conf.boards[j].name, b_arg)) {
 122                         board_idx = j;
 123                 }
 124         }
 125
 126         if (board_idx == (size_t) -1) {
 127                 ERROR_MESSAGE("No board \"%s\" known", b_arg);
 128                 goto done;
 129         }
 130
 131         /* Interpret post */
 132         errno = 0;
 133         post_id = strtoull(p_arg, 0, 0);
 134
 135         if (errno) {
 136                 ret = errno;
 137                 PERROR_MESSAGE("strtoull");
 138                 goto done;
 139         }
 140
 141         /* Set up a minimal part of the system */
 142         if (setup_locks(&conf) < 0) {
 143                 goto done;
 144         }
 145
 146         if (setup_dbs(&conf) < 0) {
 147                 goto done;
 148         }
 149
 150         if (setup_write_thread(&conf) < 0) {
 151                 goto done;
 152         }
 153
 154         if (db_is_op(board_idx, post_id, &actually_is_op) < 0) {
 155                 goto done;
 156         }
 157
 158         if (lock_acquire(board_idx) < 0) {
 159                 goto done;
 160         }
 161
 162         if (actually_is_op) {
 163                 if (db_remove_thread_and_files(board_idx, post_id) < 0) {
 164                         goto done;
 165                 }
 166         } else {
 167                 if (db_remove_post_and_files(board_idx, post_id) < 0) {
 168                         goto done;
 169                 }
 170         }
 171
 172         lock_release(board_idx);
 173         util_rebuild(&conf);
 174         ret = 0;
 175 done:
 176         clean_locks();
 177         clean_dbs();
 178         clean_write_thread();
 179
 180         return ret;
 181 }