misc/create_inode.c

   1 #include "create_inode.h"
   2
   3 #if __STDC_VERSION__ < 199901L
   4 # if __GNUC__ >= 2
   5 #  define __func__ __FUNCTION__
   6 # else
   7 #  define __func__ "<unknown>"
   8 # endif
   9 #endif
  10
  11 /* Make a special file which is block, character and fifo */
  12 errcode_t do_mknod_internal(ext2_ino_t cwd, const char *name, struct stat *st)
  13 {
  14         ext2_ino_t              ino;
  15         errcode_t               retval;
  16         struct ext2_inode       inode;
  17         unsigned long           major, minor, mode;
  18         int                     filetype;
  19
  20         switch(st->st_mode & S_IFMT) {
  21                 case S_IFCHR:
  22                         mode = LINUX_S_IFCHR;
  23                         filetype = EXT2_FT_CHRDEV;
  24                         break;
  25                 case S_IFBLK:
  26                         mode = LINUX_S_IFBLK;
  27                         filetype =  EXT2_FT_BLKDEV;
  28                         break;
  29                 case S_IFIFO:
  30                         mode = LINUX_S_IFIFO;
  31                         filetype = EXT2_FT_FIFO;
  32                         break;
  33         }
  34
  35         if (!(current_fs->flags & EXT2_FLAG_RW)) {
  36                 com_err(__func__, 0, "Filesystem opened read/only");
  37                 return -1;
  38         }
  39         retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &ino);
  40         if (retval) {
  41                 com_err(__func__, retval, 0);
  42                 return retval;
  43         }
  44
  45 #ifdef DEBUGFS
  46         printf("Allocated inode: %u\n", ino);
  47 #endif
  48         retval = ext2fs_link(current_fs, cwd, name, ino, filetype);
  49         if (retval == EXT2_ET_DIR_NO_SPACE) {
  50                 retval = ext2fs_expand_dir(current_fs, cwd);
  51                 if (retval) {
  52                         com_err(__func__, retval, "while expanding directory");
  53                         return retval;
  54                 }
  55                 retval = ext2fs_link(current_fs, cwd, name, ino, filetype);
  56         }
  57         if (retval) {
  58                 com_err(name, retval, 0);
  59                 return -1;
  60         }
  61         if (ext2fs_test_inode_bitmap2(current_fs->inode_map, ino))
  62                 com_err(__func__, 0, "Warning: inode already set");
  63         ext2fs_inode_alloc_stats2(current_fs, ino, +1, 0);
  64         memset(&inode, 0, sizeof(inode));
  65         inode.i_mode = mode;
  66         inode.i_atime = inode.i_ctime = inode.i_mtime =
  67                 current_fs->now ? current_fs->now : time(0);
  68
  69         major = major(st->st_rdev);
  70         minor = minor(st->st_rdev);
  71
  72         if ((major < 256) && (minor < 256)) {
  73                 inode.i_block[0] = major * 256 + minor;
  74                 inode.i_block[1] = 0;
  75         } else {
  76                 inode.i_block[0] = 0;
  77                 inode.i_block[1] = (minor & 0xff) | (major << 8) | ((minor & ~0xff) << 12);
  78         }
  79         inode.i_links_count = 1;
  80
  81         retval = ext2fs_write_new_inode(current_fs, ino, &inode);
  82         if (retval)
  83                 com_err(__func__, retval, "while creating inode %u", ino);
  84
  85         return retval;
  86 }
  87
  88 /* Make a symlink name -> target */
  89 errcode_t do_symlink_internal(ext2_ino_t cwd, const char *name, char *target)
  90 {
  91 }
  92
  93 /* Make a directory in the fs */
  94 errcode_t do_mkdir_internal(ext2_ino_t cwd, const char *name, struct stat *st)
  95 {
  96 }
  97
  98 /* Copy the native file to the fs */
  99 errcode_t do_write_internal(ext2_ino_t cwd, const char *src, const char *dest)
 100 {
 101 }
 102
 103 /* Copy files from source_dir to fs */
 104 errcode_t populate_fs(ext2_ino_t parent_ino, const char *source_dir)
 105 {
 106         const char      *name;
 107         DIR             *dh;
 108         struct dirent   *dent;
 109         struct stat     st;
 110         char            ln_target[PATH_MAX];
 111         ext2_ino_t      ino;
 112         errcode_t       retval;
 113         int             read_cnt;
 114
 115         root = EXT2_ROOT_INO;
 116
 117         if (chdir(source_dir) < 0) {
 118                 com_err(__func__, errno,
 119                         _("while changing working directory to \"%s\""), source_dir);
 120                 return errno;
 121         }
 122
 123         if (!(dh = opendir("."))) {
 124                 com_err(__func__, errno,
 125                         _("while openning directory \"%s\""), source_dir);
 126                 return errno;
 127         }
 128
 129         while((dent = readdir(dh))) {
 130                 if((!strcmp(dent->d_name, ".")) || (!strcmp(dent->d_name, "..")))
 131                         continue;
 132                 lstat(dent->d_name, &st);
 133                 name = dent->d_name;
 134
 135                 switch(st.st_mode & S_IFMT) {
 136                         case S_IFCHR:
 137                         case S_IFBLK:
 138                         case S_IFIFO:
 139                                 if ((retval = do_mknod_internal(parent_ino, name, &st))) {
 140                                         com_err(__func__, retval,
 141                                                 _("while creating special file \"%s\""), name);
 142                                         return retval;
 143                                 }
 144                                 break;
 145                         case S_IFSOCK:
 146                                 /* FIXME: there is no make socket function atm. */
 147                                 com_err(__func__, 0,
 148                                         _("ignoring socket file \"%s\""), name);
 149                                 continue;
 150                         case S_IFLNK:
 151                                 if((read_cnt = readlink(name, ln_target, sizeof(ln_target))) == -1) {
 152                                         com_err(__func__, errno,
 153                                                 _("while trying to readlink \"%s\""), name);
 154                                         return errno;
 155                                 }
 156                                 ln_target[read_cnt] = '\0';
 157                                 if ((retval = do_symlink_internal(parent_ino, name, ln_target))) {
 158                                         com_err(__func__, retval,
 159                                                 _("while writing symlink\"%s\""), name);
 160                                         return retval;
 161                                 }
 162                                 break;
 163                         case S_IFREG:
 164                                 if ((retval = do_write_internal(parent_ino, name, name))) {
 165                                         com_err(__func__, retval,
 166                                                 _("while writing file \"%s\""), name);
 167                                         return retval;
 168                                 }
 169                                 break;
 170                         case S_IFDIR:
 171                                 if ((retval = do_mkdir_internal(parent_ino, name, &st))) {
 172                                         com_err(__func__, retval,
 173                                                 _("while making dir \"%s\""), name);
 174                                         return retval;
 175                                 }
 176                                 if ((retval = ext2fs_namei(current_fs, root, parent_ino, name, &ino))) {
 177                                         com_err(name, retval, 0);
 178                                                 return retval;
 179                                 }
 180                                 /* Populate the dir recursively*/
 181                                 retval = populate_fs(ino, name);
 182                                 if (retval) {
 183                                         com_err(__func__, retval, _("while adding dir \"%s\""), name);
 184                                         return retval;
 185                                 }
 186                                 chdir("..");
 187                                 break;
 188                         default:
 189                                 com_err(__func__, 0,
 190                                         _("ignoring entry \"%s\""), name);
 191                 }
 192         }
 193         closedir(dh);
 194         return retval;
 195 }