create.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 create.c The create 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 /* Id of the device containing the base dir. */
  20 static dev_t device_id;
  21
  22 static int write_uid(struct user_info *ui, void *data)
  23 {
  24         char **p = data;
  25
  26         write_u32(*p, ui->uid);
  27         *p += sizeof(uint32_t);
  28         return 1;
  29 }
  30
  31 static int write_uid_list(void)
  32 {
  33         char *buf, *p, *filename;
  34         size_t size = num_uids * sizeof(uint32_t);
  35         int ret;
  36
  37         if (!num_uids)
  38                 return 0;
  39         buf = p = adu_malloc(size);
  40         ret = for_each_admissible_user(write_uid, &p);
  41         if (ret < 0)
  42                 goto out;
  43         filename = get_uid_list_name();
  44         ret = adu_write_file(filename, buf, size);
  45         free(filename);
  46 out:
  47         free(buf);
  48         return ret;
  49 }
  50
  51 static int add_directory(char *dirname, uint64_t *dir_num, uint64_t *parent_dir_num,
  52                 uint64_t *dir_size, uint64_t *dir_files)
  53 {
  54         struct osl_object dir_objects[NUM_DT_COLUMNS];
  55
  56         INFO_LOG("adding #%llu: %s\n", (long long unsigned)*dir_num, dirname);
  57         dir_objects[DT_NAME].data = dirname;
  58         dir_objects[DT_NAME].size = strlen(dirname) + 1;
  59         dir_objects[DT_NUM].data = dir_num;
  60         dir_objects[DT_NUM].size = sizeof(*dir_num);
  61         dir_objects[DT_PARENT_NUM].data = parent_dir_num;
  62         dir_objects[DT_PARENT_NUM].size = sizeof(*parent_dir_num);
  63         dir_objects[DT_BYTES].data = dir_size;
  64         dir_objects[DT_BYTES].size = sizeof(*dir_size);
  65         dir_objects[DT_FILES].data = dir_files;
  66         dir_objects[DT_FILES].size = sizeof(*dir_files);
  67         return osl(osl_add_row(dir_table, dir_objects));
  68 }
  69
  70 static int update_user_row(struct osl_table *t, uint64_t dir_num,
  71                 uint64_t *add)
  72 {
  73         struct osl_row *row;
  74         struct osl_object obj = {.data = &dir_num, .size = sizeof(dir_num)};
  75
  76         int ret = osl(osl_get_row(t, UT_DIR_NUM, &obj, &row));
  77
  78         if (ret == -E_OSL && osl_errno != E_OSL_RB_KEY_NOT_FOUND)
  79                 return ret;
  80         if (ret < 0) { /* this is the first file we add */
  81                 struct osl_object objects[NUM_UT_COLUMNS];
  82                 uint64_t num_files = 1;
  83
  84                 objects[UT_DIR_NUM].data = &dir_num;
  85                 objects[UT_DIR_NUM].size = sizeof(dir_num);
  86                 objects[UT_BYTES].data = add;
  87                 objects[UT_BYTES].size = sizeof(*add);
  88                 objects[UT_FILES].data = &num_files;
  89                 objects[UT_FILES].size = sizeof(num_files);
  90                 INFO_LOG("######################### ret: %d\n", ret);
  91                 ret = osl(osl_add_row(t, objects));
  92                 INFO_LOG("######################### ret: %d\n", ret);
  93                 return ret;
  94         } else { /* add size and increment file count */
  95                 uint64_t num;
  96                 struct osl_object obj1, obj2 = {.data = &num, .size = sizeof(num)};
  97
  98                 ret = osl(osl_get_object(t, row, UT_BYTES, &obj1));
  99                 if (ret < 0)
 100                         return ret;
 101                 num = *(uint64_t *)obj1.data + *add;
 102                 ret = osl(osl_update_object(t, row, UT_BYTES, &obj2));
 103                 if (ret < 0)
 104                         return ret;
 105                 ret = osl(osl_get_object(t, row, UT_FILES, &obj1));
 106                 if (ret < 0)
 107                         return ret;
 108                 num = *(uint64_t *)obj1.data + 1;
 109                 return osl(osl_update_object(t, row, UT_FILES, &obj2));
 110         }
 111 }
 112
 113 static int scan_dir(char *dirname, uint64_t *parent_dir_num)
 114 {
 115         DIR *dir;
 116         struct dirent *entry;
 117         int ret, cwd_fd, ret2;
 118         uint64_t dir_size = 0, dir_files = 0;
 119         /* dir count. */
 120         static uint64_t current_dir_num;
 121
 122         uint64_t this_dir_num = ++current_dir_num;
 123
 124         check_signals();
 125         DEBUG_LOG("----------------- %llu: %s\n", (long long unsigned)current_dir_num, dirname);
 126         ret = adu_opendir(dirname, &dir, &cwd_fd);
 127         if (ret < 0) {
 128                 if (ret != -ERRNO_TO_ERROR(EACCES))
 129                         return ret;
 130                 WARNING_LOG("permission denied for %s\n", dirname);
 131                 return 1;
 132         }
 133         while ((entry = readdir(dir))) {
 134                 mode_t m;
 135                 struct stat64 s;
 136                 uint32_t uid;
 137                 uint64_t size;
 138                 struct user_info *ui;
 139
 140                 if (!strcmp(entry->d_name, "."))
 141                         continue;
 142                 if (!strcmp(entry->d_name, ".."))
 143                         continue;
 144                 if (lstat64(entry->d_name, &s) == -1) {
 145                         WARNING_LOG("lstat64 error for %s/%s (%s)\n",
 146                                 dirname, entry->d_name, strerror(errno));
 147                         continue;
 148                 }
 149                 m = s.st_mode;
 150                 if (!S_ISREG(m) && !S_ISDIR(m))
 151                         continue;
 152                 if (S_ISDIR(m)) {
 153                         if (conf.one_file_system_given && s.st_dev != device_id)
 154                                 continue;
 155                         ret = scan_dir(entry->d_name, &this_dir_num);
 156                         if (ret < 0)
 157                                 goto out;
 158                         continue;
 159                 }
 160                 /* regular file */
 161                 size = s.st_size;
 162                 dir_size += size;
 163                 dir_files++;
 164                 uid = s.st_uid;
 165                 ret = search_uid(uid, NULL, CREATE_USER_TABLE | OPEN_USER_TABLE, &ui);
 166                 if (ret < 0)
 167                         goto out;
 168                 ui->bytes += size;
 169                 ui->files++;
 170                 ret = update_user_row(ui->table, this_dir_num, &size);
 171                 if (ret < 0)
 172                         goto out;
 173         }
 174         ret = add_directory(dirname, &this_dir_num, parent_dir_num,
 175                         &dir_size, &dir_files);
 176 out:
 177         closedir(dir);
 178         ret2 = adu_fchdir(cwd_fd);
 179         if (ret2 < 0 && ret >= 0)
 180                 ret = ret2;
 181         close(cwd_fd);
 182         return ret;
 183 }
 184
 185 int com_create(void)
 186 {
 187         uint64_t zero = 0ULL;
 188         int ret;
 189         struct stat statbuf;
 190
 191         if (lstat(conf.base_dir_arg, &statbuf) == -1)
 192                 return -ERRNO_TO_ERROR(errno);
 193         if (!S_ISDIR(statbuf.st_mode))
 194                 return -ERRNO_TO_ERROR(ENOTDIR);
 195         device_id = statbuf.st_dev;
 196         create_hash_table(conf.hash_table_bits_arg);
 197         ret = open_dir_table(1);
 198         if (ret < 0)
 199                 return ret;
 200         check_signals();
 201         ret = scan_dir(conf.base_dir_arg, &zero);
 202         if (ret < 0)
 203                 goto out;
 204         ret = write_uid_list();
 205 out:
 206         close_all_tables();
 207         return ret;
 208 }