Move some unfinished commands to the "pending" directory.

1 files changed, 0 insertions, 656 deletions

diff --git a/toys/other/mke2fs.c b/toys/other/mke2fs.c
deleted file mode 100644
index 1a83e4f6..00000000
--- a/toys/other/mke2fs.c
+++ /dev/null
@@ -1,656 +0,0 @@
-/* mke2fs.c - Create an ext2 filesystem image.
- *
- * Copyright 2006, 2007 Rob Landley <rob@landley.net>
-
-// Still to go: "E:jJ:L:m:O:"
-USE_MKE2FS(NEWTOY(mke2fs, "<1>2g:Fnqm#N#i#b#", TOYFLAG_SBIN))
-
-config MKE2FS
-  bool "mke2fs (unfinished and broken by dirtree changes)"
-  default n
-  help
-    usage: mke2fs [-Fnq] [-b ###] [-N|i ###] [-m ###] device
-
-    Create an ext2 filesystem on a block device or filesystem image.
-
-    -F         Force to run on a mounted device
-    -n         Don't write to device
-    -q         Quiet (no output)
-    -b size    Block size (1024, 2048, or 4096)
-    -N inodes  Allocate this many inodes
-    -i bytes   Allocate one inode for every XXX bytes of device
-    -m percent Reserve this percent of filesystem space for root user
-
-config MKE2FS_JOURNAL
-  bool "Journaling support (ext3)"
-  default n
-  depends on MKE2FS
-  help
-    usage: [-j] [-J size=###,device=XXX]
-
-    -j         Create journal (ext3)
-    -J         Journal options
-               size: Number of blocks (1024-102400)
-               device: Specify an external journal
-
-config MKE2FS_GEN
-  bool "Generate (gene2fs)"
-  default n
-  depends on MKE2FS
-  help
-    usage: gene2fs [options] device filename
-
-    The [options] are the same as mke2fs.
-
-config MKE2FS_LABEL
-  bool "Label support"
-  default n
-  depends on MKE2FS
-  help
-    usage: mke2fs [-L label] [-M path] [-o string]
-
-    -L         Volume label
-    -M         Path to mount point
-    -o         Created by
-
-config MKE2FS_EXTENDED
-  bool "Extended options"
-  default n
-  depends on MKE2FS
-  help
-    usage: mke2fs [-E stride=###] [-O option[,option]]
-
-    -E stride= Set RAID stripe size (in blocks)
-    -O [opts]  Specify fewer ext2 option flags (for old kernels)
-               All of these are on by default (as appropriate)
-       none         Clear default options (all but journaling)
-       dir_index    Use htree indexes for large directories
-       filetype     Store file type info in directory entry
-       has_journal  Set by -j
-       journal_dev  Set by -J device=XXX
-       sparse_super Don't allocate huge numbers of redundant superblocks
-*/
-
-#define FOR_mke2fs
-#include "toys.h"
-
-GLOBALS(
-  // Command line arguments.
-  long blocksize;
-  long bytes_per_inode;
-  long inodes;           // Total inodes in filesystem.
-  long reserved_percent; // Integer precent of space to reserve for root.
-  char *gendir;          // Where to read dirtree from.
-
-  // Internal data.
-  struct dirtree *dt;    // Tree of files to copy into the new filesystem.
-  unsigned treeblocks;   // Blocks used by dt
-  unsigned treeinodes;   // Inodes used by dt
-
-  unsigned blocks;       // Total blocks in the filesystem.
-  unsigned freeblocks;   // Free blocks in the filesystem.
-  unsigned inodespg;     // Inodes per group
-  unsigned groups;       // Total number of block groups.
-  unsigned blockbits;    // Bits per block.  (Also blocks per group.)
-
-  // For gene2fs
-  unsigned nextblock;    // Next data block to allocate
-  unsigned nextgroup;    // Next group we'll be allocating from
-  int fsfd;              // File descriptor of filesystem (to output to).
-
-  struct ext2_superblock sb;
-)
-
-#define INODES_RESERVED 10
-
-static uint32_t div_round_up(uint32_t a, uint32_t b)
-{
-  uint32_t c = a/b;
-
-  if (a%b) c++;
-  return c;
-}
-
-// Calculate data blocks plus index blocks needed to hold a file.
-
-static uint32_t file_blocks_used(uint64_t size, uint32_t *blocklist)
-{
-  uint32_t dblocks = (uint32_t)((size+(TT.blocksize-1))/TT.blocksize);
-  uint32_t idx=TT.blocksize/4, iblocks=0, diblocks=0, tiblocks=0;
-
-  // Fill out index blocks in inode.
-
-  if (blocklist) {
-    int i;
-
-    // Direct index blocks
-    for (i=0; i<13 && i<dblocks; i++) blocklist[i] = i;
-    // Singly indirect index blocks
-    if (dblocks > 13+idx) blocklist[13] = 13+idx;
-    // Doubly indirect index blocks
-    idx = 13 + idx + (idx*idx);
-    if (dblocks > idx) blocklist[14] = idx;
-
-    return 0;
-  }
-
-  // Account for direct, singly, doubly, and triply indirect index blocks
-
-  if (dblocks > 12) {
-    iblocks = ((dblocks-13)/idx)+1;
-    if (iblocks > 1) {
-      diblocks = ((iblocks-2)/idx)+1;
-      if (diblocks > 1)
-        tiblocks = ((diblocks-2)/idx)+1;
-    }
-  }
-
-  return dblocks + iblocks + diblocks + tiblocks;
-}
-
-// Use the parent pointer to iterate through the tree non-recursively.
-static struct dirtree *treenext(struct dirtree *this)
-{
-  while (this && !this->next) this = this->parent;
-  if (this) this = this->next;
-
-  return this;
-}
-
-// Recursively calculate the number of blocks used by each inode in the tree.
-// Returns blocks used by this directory, assigns bytes used to *size.
-// Writes total block count to TT.treeblocks and inode count to TT.treeinodes.
-
-static long check_treesize(struct dirtree *that, off_t *size)
-{
-  long blocks;
-
-  while (that) {
-    *size += sizeof(struct ext2_dentry) + strlen(that->name);
-
-    if (that->child)
-      that->st.st_blocks = check_treesize(that->child, &that->st.st_size);
-    else if (S_ISREG(that->st.st_mode)) {
-       that->st.st_blocks = file_blocks_used(that->st.st_size, 0);
-       TT.treeblocks += that->st.st_blocks;
-    }
-    that = that->next;
-  }
-  TT.treeblocks += blocks = file_blocks_used(*size, 0);
-  TT.treeinodes++;
-
-  return blocks;
-}
-
-// Calculate inode numbers and link counts.
-//
-// To do this right I need to copy the tree and sort it, but here's a really
-// ugly n^2 way of dealing with the problem that doesn't scale well to large
-// numbers of files (> 100,000) but can be done in very little code.
-// This rewrites inode numbers to their final values, allocating depth first.
-
-static void check_treelinks(struct dirtree *tree)
-{
-  struct dirtree *current=tree, *that;
-  long inode = INODES_RESERVED;
-
-  while (current) {
-    ++inode;
-    // Since we can't hardlink to directories, we know their link count.
-    if (S_ISDIR(current->st.st_mode)) current->st.st_nlink = 2;
-    else {
-      dev_t new = current->st.st_dev;
-
-      if (!new) continue;
-
-      // Look for other copies of current node
-      current->st.st_nlink = 0;
-      for (that = tree; that; that = treenext(that)) {
-        if (current->st.st_ino == that->st.st_ino &&
-          current->st.st_dev == that->st.st_dev)
-        {
-          current->st.st_nlink++;
-          current->st.st_ino = inode;
-        }
-      }
-    }
-    current->st.st_ino = inode;
-    current = treenext(current);
-  }
-}
-
-// According to http://www.opengroup.org/onlinepubs/9629399/apdxa.htm
-// we should generate a uuid structure by reading a clock with 100 nanosecond
-// precision, normalizing it to the start of the gregorian calendar in 1582,
-// and looking up our eth0 mac address.
-//
-// On the other hand, we have 128 bits to come up with a unique identifier, of
-// which 6 have a defined value.  /dev/urandom it is.
-
-static void create_uuid(char *uuid)
-{
-  // Read 128 random bits
-  int fd = xopen("/dev/urandom", O_RDONLY);
-  xreadall(fd, uuid, 16);
-  close(fd);
-
-  // Claim to be a DCE format UUID.
-  uuid[6] = (uuid[6] & 0x0F) | 0x40;
-  uuid[8] = (uuid[8] & 0x3F) | 0x80;
-
-  // rfc2518 section 6.4.1 suggests if we're not using a macaddr, we should
-  // set bit 1 of the node ID, which is the mac multicast bit.  This means we
-  // should never collide with anybody actually using a macaddr.
-  uuid[11] = uuid[11] | 128;
-}
-
-// Calculate inodes per group from total inodes.
-static uint32_t get_inodespg(uint32_t inodes)
-{
-  uint32_t temp;
-
-  // Round up to fill complete inode blocks.
-  temp = (inodes + TT.groups - 1) / TT.groups;
-  inodes = TT.blocksize/sizeof(struct ext2_inode);
-  return ((temp + inodes - 1)/inodes)*inodes;
-}
-
-// Fill out superblock and TT structures.
-
-static void init_superblock(struct ext2_superblock *sb)
-{
-  uint32_t temp;
-
-  // Set log_block_size and log_frag_size.
-
-  for (temp = 0; temp < 4; temp++) if (TT.blocksize == 1024<<temp) break;
-  if (temp==4) error_exit("bad blocksize");
-  sb->log_block_size = sb->log_frag_size = SWAP_LE32(temp);
-
-  // Fill out blocks_count, r_blocks_count, first_data_block
-
-  sb->blocks_count = SWAP_LE32(TT.blocks);
-  sb->free_blocks_count = SWAP_LE32(TT.freeblocks);
-  temp = (TT.blocks * (uint64_t)TT.reserved_percent) / 100;
-  sb->r_blocks_count = SWAP_LE32(temp);
-
-  sb->first_data_block = SWAP_LE32(TT.blocksize == 1024 ? 1 : 0);
-
-  // Set blocks_per_group and frags_per_group, which is the size of an
-  // allocation bitmap that fits in one block (I.E. how many bits per block)?
-
-  sb->blocks_per_group = sb->frags_per_group = SWAP_LE32(TT.blockbits);
-
-  // Set inodes_per_group and total inodes_count
-  sb->inodes_per_group = SWAP_LE32(TT.inodespg);
-  sb->inodes_count = SWAP_LE32(TT.inodespg * TT.groups);
-
-  // Determine free inodes.
-  temp = TT.inodespg*TT.groups - INODES_RESERVED;
-  if (temp < TT.treeinodes) error_exit("Not enough inodes.\n");
-  sb->free_inodes_count = SWAP_LE32(temp - TT.treeinodes);
-
-  // Fill out the rest of the superblock.
-  sb->max_mnt_count=0xFFFF;
-  sb->wtime = sb->lastcheck = sb->mkfs_time = SWAP_LE32(time(NULL));
-  sb->magic = SWAP_LE32(0xEF53);
-  sb->state = sb->errors = SWAP_LE16(1);
-
-  sb->rev_level = SWAP_LE32(1);
-  sb->first_ino = SWAP_LE32(INODES_RESERVED+1);
-  sb->inode_size = SWAP_LE16(sizeof(struct ext2_inode));
-  sb->feature_incompat = SWAP_LE32(EXT2_FEATURE_INCOMPAT_FILETYPE);
-  sb->feature_ro_compat = SWAP_LE32(EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER);
-
-  create_uuid(sb->uuid);
-
-  // TODO If we're called as mke3fs or mkfs.ext3, do a journal.
-
-  //if (strchr(toys.which->name,'3'))
-  //	sb->feature_compat |= SWAP_LE32(EXT3_FEATURE_COMPAT_HAS_JOURNAL);
-}
-
-// Does this group contain a superblock backup (and group descriptor table)?
-static int is_sb_group(uint32_t group)
-{
-  int i;
-
-  // Superblock backups are on groups 0, 1, and powers of 3, 5, and 7.
-  if(!group || group==1) return 1;
-  for (i=3; i<9; i+=2) {
-    int j = i;
-    while (j<group) j*=i;
-    if (j==group) return 1;
-  }
-  return 0;
-}
-
-
-// Number of blocks used in group by optional superblock/group list backup.
-static int group_superblock_overhead(uint32_t group)
-{
-  int used;
-
-  if (!is_sb_group(group)) return 0;
-
-  // How many blocks does the group descriptor table take up?
-  used = TT.groups * sizeof(struct ext2_group);
-  used += TT.blocksize - 1;
-  used /= TT.blocksize;
-  // Plus the superblock itself.
-  used++;
-  // And a corner case.
-  if (!group && TT.blocksize == 1024) used++;
-
-  return used;
-}
-
-// Number of blocks used in group to store superblock/group/inode list
-static int group_overhead(uint32_t group)
-{
-  // Return superblock backup overhead (if any), plus block/inode
-  // allocation bitmaps, plus inode tables.
-  return group_superblock_overhead(group) + 2 + get_inodespg(TT.inodespg)
-        / (TT.blocksize/sizeof(struct ext2_inode));
-}
-
-// In bitmap "array" set "len" bits starting at position "start" (from 0).
-static void bits_set(char *array, int start, int len)
-{
-  while(len) {
-    if ((start&7) || len<8) {
-      array[start/8]|=(1<<(start&7));
-      start++;
-      len--;
-    } else {
-      array[start/8]=255;
-      start+=8;
-      len-=8;
-    }
-  }
-}
-
-// Seek past len bytes (to maintain sparse file), or write zeroes if output
-// not seekable
-static void put_zeroes(int len)
-{
-  if(-1 == lseek(TT.fsfd, len, SEEK_SET)) {
-    memset(toybuf, 0, sizeof(toybuf));
-    while (len) {
-      int out = len > sizeof(toybuf) ? sizeof(toybuf) : len;
-      xwrite(TT.fsfd, toybuf, out);
-      len -= out;
-    }
-  }
-}
-
-// Fill out an inode structure from struct stat info in dirtree.
-static void fill_inode(struct ext2_inode *in, struct dirtree *that)
-{
-  uint32_t fbu[15];
-  int temp;
-
-  file_blocks_used(that->st.st_size, fbu);
-
-  // If that inode needs data blocks allocated to it.
-  if (that->st.st_size) {
-    int i, group = TT.nextblock/TT.blockbits;
-
-    // TODO: teach this about indirect blocks.
-    for (i=0; i<15; i++) {
-      // If we just jumped into a new group, skip group overhead blocks.
-      while (group >= TT.nextgroup)
-        TT.nextblock += group_overhead(TT.nextgroup++);
-    }
-  }
-  // TODO :  S_ISREG/DIR/CHR/BLK/FIFO/LNK/SOCK(m)
-  in->mode = SWAP_LE32(that->st.st_mode);
-
-  in->uid = SWAP_LE16(that->st.st_uid & 0xFFFF);
-  in->uid_high = SWAP_LE16(that->st.st_uid >> 16);
-  in->gid = SWAP_LE16(that->st.st_gid & 0xFFFF);
-  in->gid_high = SWAP_LE16(that->st.st_gid >> 16);
-  in->size = SWAP_LE32(that->st.st_size & 0xFFFFFFFF);
-
-  // Contortions to make the compiler not generate a warning for x>>32
-  // when x is 32 bits.  The optimizer should clean this up.
-  if (sizeof(that->st.st_size) > 4) temp = 32;
-  else temp = 0;
-  if (temp) in->dir_acl = SWAP_LE32(that->st.st_size >> temp);
-
-  in->atime = SWAP_LE32(that->st.st_atime);
-  in->ctime = SWAP_LE32(that->st.st_ctime);
-  in->mtime = SWAP_LE32(that->st.st_mtime);
-
-  in->links_count = SWAP_LE16(that->st.st_nlink);
-  in->blocks = SWAP_LE32(that->st.st_blocks);
-  // in->faddr
-}
-
-// Works like an archiver.
-// The first argument is the name of the file to create.  If it already
-// exists, that size will be used.
-
-void mke2fs_main(void)
-{
-  int i, temp;
-  off_t length;
-  uint32_t usedblocks, usedinodes, dtiblk, dtbblk;
-  struct dirtree *dti, *dtb;
-
-  // Handle command line arguments.
-
-  if (toys.optargs[1]) {
-    sscanf(toys.optargs[1], "%u", &TT.blocks);
-    temp = O_RDWR|O_CREAT;
-  } else temp = O_RDWR;
-  if (!TT.reserved_percent) TT.reserved_percent = 5;
-
-  // TODO: Check if filesystem is mounted here
-
-  // For mke?fs, open file.  For gene?fs, create file.
-  TT.fsfd = xcreate(*toys.optargs, temp, 0777);
-
-  // Determine appropriate block size and block count from file length.
-  // (If no length, default to 4k.  They can override it on the cmdline.)
-
-  length = fdlength(TT.fsfd);
-  if (!TT.blocksize) TT.blocksize = (length && length < 1<<29) ? 1024 : 4096;
-  TT.blockbits = 8*TT.blocksize;
-  if (!TT.blocks) TT.blocks = length/TT.blocksize;
-
-  // Collect gene2fs list or lost+found, calculate requirements.
-
-  if (TT.gendir) {
-    strncpy(toybuf, TT.gendir, sizeof(toybuf));
-    dti = dirtree_read(toybuf, NULL, NULL);
-  } else {
-    dti = xzalloc(sizeof(struct dirtree)+11);
-    strcpy(dti->name, "lost+found");
-    dti->st.st_mode = S_IFDIR|0755;
-    dti->st.st_ctime = dti->st.st_mtime = time(NULL);
-  }
-
-  // Add root directory inode.  This is iterated through for when finding
-  // blocks, but not when finding inodes.  The tree's parent pointers don't
-  // point back into this.
-
-  dtb = xzalloc(sizeof(struct dirtree)+1);
-  dtb->st.st_mode = S_IFDIR|0755;
-  dtb->st.st_ctime = dtb->st.st_mtime = time(NULL);
-  dtb->child = dti;
-
-  // Figure out how much space is used by preset files
-  length = check_treesize(dtb, &(dtb->st.st_size));
-  check_treelinks(dtb);
-
-  // Figure out how many total inodes we need.
-
-  if (!TT.inodes) {
-    if (!TT.bytes_per_inode) TT.bytes_per_inode = 8192;
-    TT.inodes = (TT.blocks * (uint64_t)TT.blocksize) / TT.bytes_per_inode;
-  }
-
-  // If we're generating a filesystem and have no idea how many blocks it
-  // needs, start with a minimal guess, find the overhead of that many
-  // groups, and loop until this is enough groups to store this many blocks.
-  if (!TT.blocks) TT.groups = (TT.treeblocks/TT.blockbits)+1;
-  else TT.groups = div_round_up(TT.blocks, TT.blockbits);
-
-  for (;;) {
-    temp = TT.treeblocks;
-
-    for (i = 0; i<TT.groups; i++) temp += group_overhead(i);
-
-    if (TT.blocks) {
-      if (TT.blocks < temp) error_exit("Not enough space.\n");
-      break;
-    }
-    if (temp <= TT.groups * TT.blockbits) {
-      TT.blocks = temp;
-      break;
-    }
-    TT.groups++;
-  }
-  TT.freeblocks = TT.blocks - temp;
-
-  // Now we know all the TT data, initialize superblock structure.
-
-  init_superblock(&TT.sb);
-
-  // Start writing.  Skip the first 1k to avoid the boot sector (if any).
-  put_zeroes(1024);
-
-  // Loop through block groups, write out each one.
-  dtiblk = dtbblk = usedblocks = usedinodes = 0;
-  for (i=0; i<TT.groups; i++) {
-    struct ext2_inode *in = (struct ext2_inode *)toybuf;
-    uint32_t start, itable, used, end;
-    int j, slot;
-
-    // Where does this group end?
-    end = TT.blockbits;
-    if ((i+1)*TT.blockbits > TT.blocks) end = TT.blocks & (TT.blockbits-1);
-
-    // Blocks used by inode table
-    itable = (TT.inodespg*sizeof(struct ext2_inode))/TT.blocksize;
-
-    // If a superblock goes here, write it out.
-    start = group_superblock_overhead(i);
-    if (start) {
-      struct ext2_group *bg = (struct ext2_group *)toybuf;
-      int treeblocks = TT.treeblocks, treeinodes = TT.treeinodes;
-
-      TT.sb.block_group_nr = SWAP_LE16(i);
-
-      // Write superblock and pad it up to block size
-      xwrite(TT.fsfd, &TT.sb, sizeof(struct ext2_superblock));
-      temp = TT.blocksize - sizeof(struct ext2_superblock);
-      if (!i && TT.blocksize > 1024) temp -= 1024;
-      memset(toybuf, 0, TT.blocksize);
-      xwrite(TT.fsfd, toybuf, temp);
-
-      // Loop through groups to write group descriptor table.
-      for(j=0; j<TT.groups; j++) {
-
-        // Figure out what sector this group starts in.
-        used = group_superblock_overhead(j);
-
-        // Find next array slot in this block (flush block if full).
-        slot = j % (TT.blocksize/sizeof(struct ext2_group));
-        if (!slot) {
-          if (j) xwrite(TT.fsfd, bg, TT.blocksize);
-          memset(bg, 0, TT.blocksize);
-        }
-
-        // How many free inodes in this group?
-        temp = TT.inodespg;
-        if (!i) temp -= INODES_RESERVED;
-        if (temp > treeinodes) {
-          treeinodes -= temp;
-          temp = 0;
-        } else {
-          temp -= treeinodes;
-          treeinodes = 0;
-        }
-        bg[slot].free_inodes_count = SWAP_LE16(temp);
-
-        // How many free blocks in this group?
-        temp = TT.inodespg/(TT.blocksize/sizeof(struct ext2_inode)) + 2;
-        temp = end-used-temp;
-        if (temp > treeblocks) {
-          treeblocks -= temp;
-          temp = 0;
-        } else {
-          temp -= treeblocks;
-          treeblocks = 0;
-        }
-        bg[slot].free_blocks_count = SWAP_LE32(temp);
-
-        // Fill out rest of group structure
-        used += j*TT.blockbits;
-        bg[slot].block_bitmap = SWAP_LE32(used++);
-        bg[slot].inode_bitmap = SWAP_LE32(used++);
-        bg[slot].inode_table = SWAP_LE32(used);
-        bg[slot].used_dirs_count = 0;  // (TODO)
-      }
-      xwrite(TT.fsfd, bg, TT.blocksize);
-    }
-
-    // Now write out stuff that every block group has.
-
-    // Write block usage bitmap
-
-    start += 2 + itable;
-    memset(toybuf, 0, TT.blocksize);
-    bits_set(toybuf, 0, start);
-    bits_set(toybuf, end, TT.blockbits-end);
-    temp = TT.treeblocks - usedblocks;
-    if (temp) {
-      if (end-start > temp) temp = end-start;
-      bits_set(toybuf, start, temp);
-    }
-    xwrite(TT.fsfd, toybuf, TT.blocksize);
-
-    // Write inode bitmap
-    memset(toybuf, 0, TT.blocksize);
-    j = 0;
-    if (!i) bits_set(toybuf, 0, j = INODES_RESERVED);
-    bits_set(toybuf, TT.inodespg, slot = TT.blockbits-TT.inodespg);
-    temp = TT.treeinodes - usedinodes;
-    if (temp) {
-      if (slot-j > temp) temp = slot-j;
-      bits_set(toybuf, j, temp);
-    }
-    xwrite(TT.fsfd, toybuf, TT.blocksize);
-
-    // Write inode table for this group (TODO)
-    for (j = 0; j<TT.inodespg; j++) {
-      slot = j % (TT.blocksize/sizeof(struct ext2_inode));
-      if (!slot) {
-        if (j) xwrite(TT.fsfd, in, TT.blocksize);
-        memset(in, 0, TT.blocksize);
-      }
-      if (!i && j<INODES_RESERVED) {
-        // Write root inode
-        if (j == 2) fill_inode(in+slot, dtb);
-      } else if (dti) {
-        fill_inode(in+slot, dti);
-        dti = treenext(dti);
-      }
-    }
-    xwrite(TT.fsfd, in, TT.blocksize);
-
-    while (dtb) {
-      // TODO write index data block
-      // TODO write root directory data block
-      // TODO write directory data block
-      // TODO write file data block
-      put_zeroes(TT.blocksize);
-      start++;
-      if (start == end) break;
-    }
-    // Write data blocks (TODO)
-    put_zeroes((end-start) * TT.blocksize);
-  }
-}