rb79-delete-post.c

   1 /*
   2  * Copyright (c) 2017-2018, 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 usage(void)
  36 {
  37         size_t len = strlen(program_name);
  38
  39         printf("Usage: %s -b board-name\n", program_name);
  40         printf("       %*s -p post-id\n", (int) len, "");
  41 }
  42
  43 /* Do the thing */
  44 int main(int argc, char **argv)
  45 {
  46         int ret = EINVAL;
  47         struct configuration conf = { 0 };
  48         int opt = 0;
  49         const char *b_arg = 0;
  50         size_t board_idx = 0;
  51         const char *p_arg = 0;
  52         uintmax_t post_id = 0;
  53         uint_fast8_t actually_is_op = 0;
  54
  55         setlocale(LC_ALL, "");
  56
  57         /* Parse options */
  58         while ((opt = getopt(argc, argv, "b:p:")) != -1) {
  59                 switch (opt) {
  60                 case 'b':
  61
  62                         if (b_arg) {
  63                                 ERROR_MESSAGE("-b already specified");
  64                                 goto done;
  65                         }
  66
  67                         b_arg = optarg;
  68                         break;
  69                 case 'p':
  70
  71                         if (p_arg) {
  72                                 ERROR_MESSAGE("-p already specified");
  73                                 goto done;
  74                         }
  75
  76                         p_arg = optarg;
  77                         break;
  78                 default:
  79                         usage();
  80                         goto done;
  81                 }
  82         }
  83
  84         if (!b_arg ||
  85             !p_arg) {
  86                 usage();
  87                 goto done;
  88         }
  89
  90         conf = (struct configuration) {
  91                 /* */
  92                 .static_www_folder = static_www_folder,             /* */
  93                 .work_path = work_path,                             /* */
  94                 .temp_dir_template = temp_dir_template,             /* */
  95                 .trip_salt = trip_salt,                             /* */
  96                 .trip_salt_len = strlen(trip_salt),                 /* */
  97                 .boards = boards,                                   /* */
  98                 .boards_num = NUM_OF(boards),                       /* */
  99                 .max_form_data_size = max_form_data_size,           /* */
 100                 .max_file_size = max_file_size,                     /* */
 101                 .max_text_len = max_text_len,                       /* */
 102                 .filetypes = filetypes,                             /* */
 103                 .filetypes_num = NUM_OF(filetypes),                 /* */
 104                 .file_description_prog = file_description_prog,     /* */
 105                 .headers = headers,                                 /* */
 106                 .headers_num = NUM_OF(headers),                     /* */
 107                 .challenges = challenges,                           /* */
 108                 .challenges_num = NUM_OF(challenges),               /* */
 109                 .wordfilter_inputs = wordfilter_inputs,             /* */
 110                 .wordfilter_inputs_num = NUM_OF(wordfilter_inputs), /* */
 111         };
 112
 113         /* Interpret board */
 114         board_idx = (size_t) -1;
 115
 116         for (size_t j = 0; j < conf.boards_num; ++j) {
 117                 if (!strcmp(conf.boards[j].name, b_arg)) {
 118                         board_idx = j;
 119                 }
 120         }
 121
 122         if (board_idx == (size_t) -1) {
 123                 ERROR_MESSAGE("No board \"%s\" known", b_arg);
 124                 goto done;
 125         }
 126
 127         /* Interpret post */
 128         errno = 0;
 129         post_id = strtoull(p_arg, 0, 0);
 130
 131         if (errno) {
 132                 ret = errno;
 133                 PERROR_MESSAGE("strtoull");
 134                 goto done;
 135         }
 136
 137         /* Set up a minimal part of the system */
 138         if (setup_locks(&conf) < 0) {
 139                 goto done;
 140         }
 141
 142         if (setup_dbs(&conf) < 0) {
 143                 goto done;
 144         }
 145
 146         if (setup_write_thread(&conf) < 0) {
 147                 goto done;
 148         }
 149
 150         if (db_is_op(board_idx, post_id, &actually_is_op) < 0) {
 151                 goto done;
 152         }
 153
 154         if (lock_acquire(board_idx) < 0) {
 155                 goto done;
 156         }
 157
 158         if (actually_is_op) {
 159                 if (db_remove_thread_and_files(board_idx, post_id) < 0) {
 160                         goto done;
 161                 }
 162         } else {
 163                 if (db_remove_post_and_files(board_idx, post_id) < 0) {
 164                         goto done;
 165                 }
 166         }
 167
 168         lock_release(board_idx);
 169         util_rebuild(&conf);
 170         ret = 0;
 171 done:
 172         clean_locks();
 173         clean_dbs();
 174         clean_write_thread();
 175
 176         return ret;
 177 }