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 "adu.h"
  11 #include "gcc-compat.h"
  12 #include "cmdline.h"
  13 #include "fd.h"
  14 #include "string.h"
  15 #include "error.h"
  16 #include "portable_io.h"
  17
  18 /* Id of the device containing the base dir. */
  19 static dev_t device_id;
  20
  21 static int write_uid(struct user_info *ui, void *data)
  22 {
  23         char **p = data;
  24
  25         write_u32(*p, ui->uid);
  26         *p += sizeof(uint32_t);
  27         return 1;
  28 }
  29
  30 static int write_uid_list(void)
  31 {
  32         char *buf, *p, *filename;
  33         size_t size = num_uids * sizeof(uint32_t);
  34         int ret;
  35
  36         if (!num_uids)
  37                 return 0;
  38         buf = p = adu_malloc(size);
  39         ret = for_each_admissible_user(write_uid, &p);
  40         if (ret < 0)
  41                 goto out;
  42         filename = get_uid_list_name();
  43         ret = adu_write_file(filename, buf, size);
  44         free(filename);
  45 out:
  46         free(buf);
  47         return ret;
  48 }
  49
  50 static int add_directory(char *dirname, uint64_t *dir_num, uint64_t *parent_dir_num,
  51                 uint64_t *dir_size, uint64_t *dir_files)
  52 {
  53         struct osl_object dir_objects[NUM_DT_COLUMNS];
  54
  55         INFO_LOG("adding #%llu: %s\n", (long long unsigned)*dir_num, dirname);
  56         dir_objects[DT_NAME].data = dirname;
  57         dir_objects[DT_NAME].size = strlen(dirname) + 1;
  58         dir_objects[DT_NUM].data = dir_num;
  59         dir_objects[DT_NUM].size = sizeof(*dir_num);
  60         dir_objects[DT_PARENT_NUM].data = parent_dir_num;
  61         dir_objects[DT_PARENT_NUM].size = sizeof(*parent_dir_num);
  62         dir_objects[DT_BYTES].data = dir_size;
  63         dir_objects[DT_BYTES].size = sizeof(*dir_size);
  64         dir_objects[DT_FILES].data = dir_files;
  65         dir_objects[DT_FILES].size = sizeof(*dir_files);
  66         return osl(osl_add_row(dir_table, dir_objects));
  67 }
  68
  69 static int update_user_row(struct osl_table *t, uint64_t dir_num,
  70                 uint64_t *add)
  71 {
  72         struct osl_row *row;
  73         struct osl_object obj = {.data = &dir_num, .size = sizeof(dir_num)};
  74
  75         int ret = osl(osl_get_row(t, UT_DIR_NUM, &obj, &row));
  76
  77         if (ret == -E_OSL && osl_errno != E_OSL_RB_KEY_NOT_FOUND)
  78                 return ret;
  79         if (ret < 0) { /* this is the first file we add */
  80                 struct osl_object objects[NUM_UT_COLUMNS];
  81                 uint64_t num_files = 1;
  82
  83                 objects[UT_DIR_NUM].data = &dir_num;
  84                 objects[UT_DIR_NUM].size = sizeof(dir_num);
  85                 objects[UT_BYTES].data = add;
  86                 objects[UT_BYTES].size = sizeof(*add);
  87                 objects[UT_FILES].data = &num_files;
  88                 objects[UT_FILES].size = sizeof(num_files);
  89                 INFO_LOG("######################### ret: %d\n", ret);
  90                 ret = osl(osl_add_row(t, objects));
  91                 INFO_LOG("######################### ret: %d\n", ret);
  92                 return ret;
  93         } else { /* add size and increment file count */
  94                 uint64_t num;
  95                 struct osl_object obj1, obj2 = {.data = &num, .size = sizeof(num)};
  96
  97                 ret = osl(osl_get_object(t, row, UT_BYTES, &obj1));
  98                 if (ret < 0)
  99                         return ret;
 100                 num = *(uint64_t *)obj1.data + *add;
 101                 ret = osl(osl_update_object(t, row, UT_BYTES, &obj2));
 102                 if (ret < 0)
 103                         return ret;
 104                 ret = osl(osl_get_object(t, row, UT_FILES, &obj1));
 105                 if (ret < 0)
 106                         return ret;
 107                 num = *(uint64_t *)obj1.data + 1;
 108                 return osl(osl_update_object(t, row, UT_FILES, &obj2));
 109         }
 110 }
 111
 112 static int scan_dir(char *dirname, uint64_t *parent_dir_num)
 113 {
 114         DIR *dir;
 115         struct dirent *entry;
 116         int ret, cwd_fd, ret2;
 117         uint64_t dir_size = 0, dir_files = 0;
 118         /* dir count. */
 119         static uint64_t current_dir_num;
 120
 121         uint64_t this_dir_num = ++current_dir_num;
 122
 123         check_signals();
 124         DEBUG_LOG("----------------- %llu: %s\n", (long long unsigned)current_dir_num, dirname);
 125         ret = adu_opendir(dirname, &dir, &cwd_fd);
 126         if (ret < 0) {
 127                 if (ret != -ERRNO_TO_ERROR(EACCES))
 128                         return ret;
 129                 WARNING_LOG("permission denied for %s\n", dirname);
 130                 return 1;
 131         }
 132         while ((entry = readdir(dir))) {
 133                 mode_t m;
 134                 struct stat64 s;
 135                 uint32_t uid;
 136                 uint64_t size;
 137                 struct user_info *ui;
 138
 139                 if (!strcmp(entry->d_name, "."))
 140                         continue;
 141                 if (!strcmp(entry->d_name, ".."))
 142                         continue;
 143                 if (lstat64(entry->d_name, &s) == -1) {
 144                         WARNING_LOG("lstat64 error for %s/%s (%s)\n",
 145                                 dirname, entry->d_name, strerror(errno));
 146                         continue;
 147                 }
 148                 m = s.st_mode;
 149                 if (!S_ISREG(m) && !S_ISDIR(m))
 150                         continue;
 151                 if (S_ISDIR(m)) {
 152                         if (conf.one_file_system_given && s.st_dev != device_id)
 153                                 continue;
 154                         ret = scan_dir(entry->d_name, &this_dir_num);
 155                         if (ret < 0)
 156                                 goto out;
 157                         continue;
 158                 }
 159                 /* regular file */
 160                 size = s.st_size;
 161                 dir_size += size;
 162                 dir_files++;
 163                 uid = s.st_uid;
 164                 ret = search_uid(uid, NULL, CREATE_USER_TABLE | OPEN_USER_TABLE, &ui);
 165                 if (ret < 0)
 166                         goto out;
 167                 ui->bytes += size;
 168                 ui->files++;
 169                 ret = update_user_row(ui->table, this_dir_num, &size);
 170                 if (ret < 0)
 171                         goto out;
 172         }
 173         ret = add_directory(dirname, &this_dir_num, parent_dir_num,
 174                         &dir_size, &dir_files);
 175 out:
 176         closedir(dir);
 177         ret2 = adu_fchdir(cwd_fd);
 178         if (ret2 < 0 && ret >= 0)
 179                 ret = ret2;
 180         close(cwd_fd);
 181         return ret;
 182 }
 183
 184 int com_create(void)
 185 {
 186         uint64_t zero = 0ULL;
 187         int ret;
 188         struct stat statbuf;
 189
 190         if (lstat(conf.base_dir_arg, &statbuf) == -1)
 191                 return -ERRNO_TO_ERROR(errno);
 192         if (!S_ISDIR(statbuf.st_mode))
 193                 return -ERRNO_TO_ERROR(ENOTDIR);
 194         device_id = statbuf.st_dev;
 195         create_hash_table(conf.hash_table_bits_arg);
 196         ret = open_dir_table(1);
 197         if (ret < 0)
 198                 return ret;
 199         check_signals();
 200         ret = scan_dir(conf.base_dir_arg, &zero);
 201         if (ret < 0)
 202                 goto out;
 203         ret = write_uid_list();
 204 out:
 205         close_all_tables();
 206         return ret;
 207 }