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Diffstat (limited to 'fs/ext2/ext2fs.c')
-rw-r--r--fs/ext2/ext2fs.c924
1 files changed, 399 insertions, 525 deletions
diff --git a/fs/ext2/ext2fs.c b/fs/ext2/ext2fs.c
index bae72a3..a2d698a 100644
--- a/fs/ext2/ext2fs.c
+++ b/fs/ext2/ext2fs.c
@@ -30,7 +30,8 @@
#include <malloc.h>
#include <asm/byteorder.h>
-extern int ext2fs_devread (int sector, int byte_offset, int byte_len, char *buf);
+extern int ext2fs_devread (int sector, int byte_offset, int byte_len,
+ char *buf);
/* Magic value used to identify an ext2 filesystem. */
#define EXT2_MAGIC 0xEF53
@@ -66,8 +67,7 @@ extern int ext2fs_devread (int sector, int byte_offset, int byte_len, char *buf)
#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
/* The ext2 superblock. */
-struct ext2_sblock
-{
+struct ext2_sblock {
uint32_t total_inodes;
uint32_t total_blocks;
uint32_t reserved_blocks;
@@ -106,8 +106,7 @@ struct ext2_sblock
};
/* The ext2 blockgroup. */
-struct ext2_block_group
-{
+struct ext2_block_group {
uint32_t block_id;
uint32_t inode_id;
uint32_t inode_table_id;
@@ -118,8 +117,7 @@ struct ext2_block_group
};
/* The ext2 inode. */
-struct ext2_inode
-{
+struct ext2_inode {
uint16_t mode;
uint16_t uid;
uint32_t size;
@@ -129,20 +127,18 @@ struct ext2_inode
uint32_t dtime;
uint16_t gid;
uint16_t nlinks;
- uint32_t blockcnt; /* Blocks of 512 bytes!! */
+ uint32_t blockcnt; /* Blocks of 512 bytes!! */
uint32_t flags;
uint32_t osd1;
- union
- {
- struct datablocks
- {
+ union {
+ struct datablocks {
uint32_t dir_blocks[INDIRECT_BLOCKS];
uint32_t indir_block;
uint32_t double_indir_block;
uint32_t tripple_indir_block;
} blocks;
char symlink[60];
- } b;
+ } b;
uint32_t version;
uint32_t acl;
uint32_t dir_acl;
@@ -151,25 +147,22 @@ struct ext2_inode
};
/* The header of an ext2 directory entry. */
-struct ext2_dirent
-{
+struct ext2_dirent {
uint32_t inode;
uint16_t direntlen;
- uint8_t namelen;
- uint8_t filetype;
+ uint8_t namelen;
+ uint8_t filetype;
};
-struct ext2fs_node
-{
+struct ext2fs_node {
struct ext2_data *data;
struct ext2_inode inode;
- int ino;
- int inode_read;
+ int ino;
+ int inode_read;
};
/* Information about a "mounted" ext2 filesystem. */
-struct ext2_data
-{
+struct ext2_data {
struct ext2_sblock sblock;
struct ext2_inode *inode;
struct ext2fs_node diropen;
@@ -178,827 +171,708 @@ struct ext2_data
typedef struct ext2fs_node *ext2fs_node_t;
-struct ext2_data *ext2fs_root = NULL;
-ext2fs_node_t ext2fs_file = NULL;
-int symlinknest = 0;
-uint32_t *indir1_block = NULL;
-int indir1_size = 0;
-int indir1_blkno = -1;
-uint32_t *indir2_block = NULL;
-int indir2_size = 0;
-int indir2_blkno = -1;
+struct ext2_data *ext2fs_root = NULL;
+ext2fs_node_t ext2fs_file = NULL;
+int symlinknest = 0;
+uint32_t *indir1_block = NULL;
+int indir1_size = 0;
+int indir1_blkno = -1;
+uint32_t *indir2_block = NULL;
+int indir2_size = 0;
+int indir2_blkno = -1;
static int ext2fs_blockgroup
-(
- struct ext2_data *data,
- int group,
- struct ext2_block_group *blkgrp
- )
-{
+ (struct ext2_data *data, int group, struct ext2_block_group *blkgrp) {
#ifdef DEBUG
- printf("ext2fs read blockgroup\n");
+ printf ("ext2fs read blockgroup\n");
#endif
- return(ext2fs_devread (((__le32_to_cpu (data->sblock.first_data_block) + 1) << LOG2_EXT2_BLOCK_SIZE (data)),
- group * sizeof (struct ext2_block_group),
- sizeof (struct ext2_block_group),
- (char *) blkgrp));
+ return (ext2fs_devread
+ (((__le32_to_cpu (data->sblock.first_data_block) +
+ 1) << LOG2_EXT2_BLOCK_SIZE (data)),
+ group * sizeof (struct ext2_block_group),
+ sizeof (struct ext2_block_group), (char *) blkgrp));
}
static int ext2fs_read_inode
-(
- struct ext2_data *data,
- int ino,
- struct ext2_inode *inode
- )
-{
- struct ext2_block_group blkgrp;
- struct ext2_sblock *sblock = &data->sblock;
- int inodes_per_block;
- int status;
+ (struct ext2_data *data, int ino, struct ext2_inode *inode) {
+ struct ext2_block_group blkgrp;
+ struct ext2_sblock *sblock = &data->sblock;
+ int inodes_per_block;
+ int status;
- unsigned int blkno;
- unsigned int blkoff;
+ unsigned int blkno;
+ unsigned int blkoff;
/* It is easier to calculate if the first inode is 0. */
ino--;
#ifdef DEBUG
- printf("ext2fs read inode %d\n", ino);
+ printf ("ext2fs read inode %d\n", ino);
#endif
- status = ext2fs_blockgroup (data, ino / __le32_to_cpu(sblock->inodes_per_group), &blkgrp);
- if (status == 0)
- {
- return(0);
+ status = ext2fs_blockgroup (data,
+ ino /
+ __le32_to_cpu (sblock->inodes_per_group),
+ &blkgrp);
+ if (status == 0) {
+ return (0);
}
inodes_per_block = EXT2_BLOCK_SIZE (data) / 128;
- blkno = (ino % __le32_to_cpu (sblock->inodes_per_group)) / inodes_per_block;
- blkoff = (ino % __le32_to_cpu (sblock->inodes_per_group)) % inodes_per_block;
+ blkno = (ino % __le32_to_cpu (sblock->inodes_per_group)) /
+ inodes_per_block;
+ blkoff = (ino % __le32_to_cpu (sblock->inodes_per_group)) %
+ inodes_per_block;
#ifdef DEBUG
- printf("ext2fs read inode blkno %d blkoff %d\n", blkno, blkoff);
+ printf ("ext2fs read inode blkno %d blkoff %d\n", blkno, blkoff);
#endif
/* Read the inode. */
- status = ext2fs_devread(((__le32_to_cpu (blkgrp.inode_table_id) + blkno) << LOG2_EXT2_BLOCK_SIZE (data)),
- sizeof (struct ext2_inode) * blkoff,
- sizeof (struct ext2_inode),
- (char *) inode);
- if (status == 0)
- {
- return(0);
- }
- return(1);
+ status = ext2fs_devread (((__le32_to_cpu (blkgrp.inode_table_id) +
+ blkno) << LOG2_EXT2_BLOCK_SIZE (data)),
+ sizeof (struct ext2_inode) * blkoff,
+ sizeof (struct ext2_inode), (char *) inode);
+ if (status == 0) {
+ return (0);
+ }
+ return (1);
}
-void ext2fs_free_node
-(
- ext2fs_node_t node,
- ext2fs_node_t currroot
- )
-{
- if ((node != &ext2fs_root->diropen) && (node != currroot))
- {
+void ext2fs_free_node (ext2fs_node_t node, ext2fs_node_t currroot) {
+ if ((node != &ext2fs_root->diropen) && (node != currroot)) {
free (node);
}
}
-static int ext2fs_read_block
-(
- ext2fs_node_t node,
- int fileblock
- )
-{
- struct ext2_data *data = node->data;
- struct ext2_inode *inode = &node->inode;
- int blknr;
- int blksz = EXT2_BLOCK_SIZE (data);
- int log2_blksz = LOG2_EXT2_BLOCK_SIZE (data);
- int status;
+static int ext2fs_read_block (ext2fs_node_t node, int fileblock) {
+ struct ext2_data *data = node->data;
+ struct ext2_inode *inode = &node->inode;
+ int blknr;
+ int blksz = EXT2_BLOCK_SIZE (data);
+ int log2_blksz = LOG2_EXT2_BLOCK_SIZE (data);
+ int status;
/* Direct blocks. */
- if (fileblock < INDIRECT_BLOCKS)
- {
+ if (fileblock < INDIRECT_BLOCKS) {
blknr = __le32_to_cpu (inode->b.blocks.dir_blocks[fileblock]);
- }
+ }
/* Indirect. */
- else if (fileblock < (INDIRECT_BLOCKS + (blksz/4)))
- {
- if (indir1_block == NULL)
- {
- indir1_block = (uint32_t *) malloc(blksz);
- if (indir1_block == NULL)
- {
- printf("** ext2fs read block (indir 1) malloc failed. **\n");
- return(-1);
+ else if (fileblock < (INDIRECT_BLOCKS + (blksz / 4))) {
+ if (indir1_block == NULL) {
+ indir1_block = (uint32_t *) malloc (blksz);
+ if (indir1_block == NULL) {
+ printf ("** ext2fs read block (indir 1) malloc failed. **\n");
+ return (-1);
}
- indir1_size = blksz;
+ indir1_size = blksz;
indir1_blkno = -1;
}
- if (blksz != indir1_size)
- {
- free(indir1_block);
+ if (blksz != indir1_size) {
+ free (indir1_block);
indir1_block = NULL;
- indir1_size = 0;
+ indir1_size = 0;
indir1_blkno = -1;
- indir1_block = (uint32_t *) malloc(blksz);
- if (indir1_block == NULL)
- {
- printf("** ext2fs read block (indir 1) malloc failed. **\n");
- return(-1);
+ indir1_block = (uint32_t *) malloc (blksz);
+ if (indir1_block == NULL) {
+ printf ("** ext2fs read block (indir 1) malloc failed. **\n");
+ return (-1);
}
- indir1_size = blksz;
+ indir1_size = blksz;
}
- if ((__le32_to_cpu(inode->b.blocks.indir_block) << log2_blksz) != indir1_blkno)
- {
- status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.indir_block) << log2_blksz, 0, blksz, (char *) indir1_block);
- if (status == 0)
- {
- printf("** ext2fs read block (indir 1) failed. **\n");
- return(0);
+ if ((__le32_to_cpu (inode->b.blocks.indir_block) <<
+ log2_blksz) != indir1_blkno) {
+ status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.indir_block) << log2_blksz,
+ 0, blksz,
+ (char *) indir1_block);
+ if (status == 0) {
+ printf ("** ext2fs read block (indir 1) failed. **\n");
+ return (0);
}
- indir1_blkno = __le32_to_cpu(inode->b.blocks.indir_block) << log2_blksz;
+ indir1_blkno =
+ __le32_to_cpu (inode->b.blocks.
+ indir_block) << log2_blksz;
}
- blknr = __le32_to_cpu(indir1_block[fileblock - INDIRECT_BLOCKS]);
+ blknr = __le32_to_cpu (indir1_block
+ [fileblock - INDIRECT_BLOCKS]);
}
/* Double indirect. */
- else if (fileblock < (INDIRECT_BLOCKS + (blksz / 4 * (blksz / 4 + 1))))
- {
+ else if (fileblock <
+ (INDIRECT_BLOCKS + (blksz / 4 * (blksz / 4 + 1)))) {
unsigned int perblock = blksz / 4;
unsigned int rblock = fileblock - (INDIRECT_BLOCKS
+ blksz / 4);
- if (indir1_block == NULL)
- {
- indir1_block = (uint32_t *) malloc(blksz);
- if (indir1_block == NULL)
- {
- printf("** ext2fs read block (indir 2 1) malloc failed. **\n");
- return(-1);
+ if (indir1_block == NULL) {
+ indir1_block = (uint32_t *) malloc (blksz);
+ if (indir1_block == NULL) {
+ printf ("** ext2fs read block (indir 2 1) malloc failed. **\n");
+ return (-1);
}
- indir1_size = blksz;
+ indir1_size = blksz;
indir1_blkno = -1;
}
- if (blksz != indir1_size)
- {
- free(indir1_block);
+ if (blksz != indir1_size) {
+ free (indir1_block);
indir1_block = NULL;
- indir1_size = 0;
+ indir1_size = 0;
indir1_blkno = -1;
- indir1_block = (uint32_t *) malloc(blksz);
- if (indir1_block == NULL)
- {
- printf("** ext2fs read block (indir 2 1) malloc failed. **\n");
- return(-1);
+ indir1_block = (uint32_t *) malloc (blksz);
+ if (indir1_block == NULL) {
+ printf ("** ext2fs read block (indir 2 1) malloc failed. **\n");
+ return (-1);
}
- indir1_size = blksz;
+ indir1_size = blksz;
}
- if ((__le32_to_cpu(inode->b.blocks.double_indir_block) << log2_blksz) != indir1_blkno)
- {
- status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.double_indir_block) << log2_blksz, 0, blksz, (char *) indir1_block);
- if (status == 0)
- {
- printf("** ext2fs read block (indir 2 1) failed. **\n");
- return(-1);
+ if ((__le32_to_cpu (inode->b.blocks.double_indir_block) <<
+ log2_blksz) != indir1_blkno) {
+ status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.double_indir_block) << log2_blksz,
+ 0, blksz,
+ (char *) indir1_block);
+ if (status == 0) {
+ printf ("** ext2fs read block (indir 2 1) failed. **\n");
+ return (-1);
}
- indir1_blkno = __le32_to_cpu(inode->b.blocks.double_indir_block) << log2_blksz;
+ indir1_blkno =
+ __le32_to_cpu (inode->b.blocks.double_indir_block) << log2_blksz;
}
- if (indir2_block == NULL)
- {
- indir2_block = (uint32_t *) malloc(blksz);
- if (indir2_block == NULL)
- {
- printf("** ext2fs read block (indir 2 2) malloc failed. **\n");
- return(-1);
+ if (indir2_block == NULL) {
+ indir2_block = (uint32_t *) malloc (blksz);
+ if (indir2_block == NULL) {
+ printf ("** ext2fs read block (indir 2 2) malloc failed. **\n");
+ return (-1);
}
- indir2_size = blksz;
+ indir2_size = blksz;
indir2_blkno = -1;
}
- if (blksz != indir2_size)
- {
- free(indir2_block);
+ if (blksz != indir2_size) {
+ free (indir2_block);
indir2_block = NULL;
- indir2_size = 0;
+ indir2_size = 0;
indir2_blkno = -1;
- indir2_block = (uint32_t *) malloc(blksz);
- if (indir2_block == NULL)
- {
- printf("** ext2fs read block (indir 2 2) malloc failed. **\n");
- return(-1);
+ indir2_block = (uint32_t *) malloc (blksz);
+ if (indir2_block == NULL) {
+ printf ("** ext2fs read block (indir 2 2) malloc failed. **\n");
+ return (-1);
}
- indir2_size = blksz;
+ indir2_size = blksz;
}
- if ((__le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz) != indir1_blkno)
- {
- status = ext2fs_devread(__le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz, 0, blksz, (char *) indir2_block);
- if (status == 0)
- {
- printf("** ext2fs read block (indir 2 2) failed. **\n");
- return(-1);
+ if ((__le32_to_cpu (indir1_block[rblock / perblock]) <<
+ log2_blksz) != indir1_blkno) {
+ status = ext2fs_devread (__le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz,
+ 0, blksz,
+ (char *) indir2_block);
+ if (status == 0) {
+ printf ("** ext2fs read block (indir 2 2) failed. **\n");
+ return (-1);
}
- indir2_blkno = __le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz;
+ indir2_blkno =
+ __le32_to_cpu (indir1_block[rblock / perblock]) << log2_blksz;
}
- blknr = __le32_to_cpu(indir2_block[rblock % perblock]);
+ blknr = __le32_to_cpu (indir2_block[rblock % perblock]);
}
/* Tripple indirect. */
- else
- {
- printf("** ext2fs doesn't support tripple indirect blocks. **\n");
- return(-1);
- }
+ else {
+ printf ("** ext2fs doesn't support tripple indirect blocks. **\n");
+ return (-1);
+ }
#ifdef DEBUG
- printf("ext2fs_read_block %08x\n", blknr);
+ printf ("ext2fs_read_block %08x\n", blknr);
#endif
- return(blknr);
+ return (blknr);
}
int ext2fs_read_file
-(
- ext2fs_node_t node,
- int pos,
- unsigned int len,
- char *buf
- )
-{
- int i;
- int blockcnt;
- int log2blocksize = LOG2_EXT2_BLOCK_SIZE (node->data);
- int blocksize = 1 << (log2blocksize + DISK_SECTOR_BITS);
- unsigned int filesize = node->inode.size;
+ (ext2fs_node_t node, int pos, unsigned int len, char *buf) {
+ int i;
+ int blockcnt;
+ int log2blocksize = LOG2_EXT2_BLOCK_SIZE (node->data);
+ int blocksize = 1 << (log2blocksize + DISK_SECTOR_BITS);
+ unsigned int filesize = node->inode.size;
/* Adjust len so it we can't read past the end of the file. */
- if (len > filesize)
- {
+ if (len > filesize) {
len = filesize;
}
- blockcnt = ((len + pos) + blocksize - 1) / blocksize;
+ blockcnt = ((len + pos) + blocksize - 1) / blocksize;
- for (i = pos / blocksize; i < blockcnt; i++)
- {
+ for (i = pos / blocksize; i < blockcnt; i++) {
int blknr;
int blockoff = pos % blocksize;
int blockend = blocksize;
int skipfirst = 0;
- blknr = ext2fs_read_block(node, i);
- if (blknr < 0)
- {
- return(-1);
+ blknr = ext2fs_read_block (node, i);
+ if (blknr < 0) {
+ return (-1);
}
blknr = blknr << log2blocksize;
/* Last block. */
- if (i == blockcnt - 1)
- {
+ if (i == blockcnt - 1) {
blockend = (len + pos) % blocksize;
/* The last portion is exactly blocksize. */
- if (!blockend)
- {
+ if (!blockend) {
blockend = blocksize;
}
}
/* First block. */
- if (i == pos / blocksize)
- {
+ if (i == pos / blocksize) {
skipfirst = blockoff;
blockend -= skipfirst;
}
/* If the block number is 0 this block is not stored on disk but
is zero filled instead. */
- if (blknr)
- {
+ if (blknr) {
int status;
status = ext2fs_devread (blknr, skipfirst, blockend, buf);
- if (status == 0)
- {
- return(-1);
+ if (status == 0) {
+ return (-1);
}
- }
- else
- {
+ } else {
memset (buf, blocksize - skipfirst, 0);
}
buf += blocksize - skipfirst;
- }
- return(len);
+ }
+ return (len);
}
-static int ext2fs_iterate_dir
-(
- ext2fs_node_t dir,
- char *name,
- ext2fs_node_t *fnode,
- int *ftype
- )
+static int ext2fs_iterate_dir (ext2fs_node_t dir, char *name, ext2fs_node_t * fnode, int *ftype)
{
unsigned int fpos = 0;
- int status;
+ int status;
struct ext2fs_node *diro = (struct ext2fs_node *) dir;
+
#ifdef DEBUG
- if (name != NULL) printf("Iterate dir %s\n", name);
+ if (name != NULL)
+ printf ("Iterate dir %s\n", name);
#endif /* of DEBUG */
- if (!diro->inode_read)
- {
- status = ext2fs_read_inode (diro->data, diro->ino, &diro->inode);
- if (status == 0)
- {
- return(0);
+ if (!diro->inode_read) {
+ status = ext2fs_read_inode (diro->data, diro->ino,
+ &diro->inode);
+ if (status == 0) {
+ return (0);
}
}
/* Search the file. */
- while (fpos < __le32_to_cpu (diro->inode.size))
- {
+ while (fpos < __le32_to_cpu (diro->inode.size)) {
struct ext2_dirent dirent;
- status = ext2fs_read_file (diro, fpos, sizeof (struct ext2_dirent), (char *) &dirent);
- if (status < 1)
- {
- return(0);
+ status = ext2fs_read_file (diro, fpos,
+ sizeof (struct ext2_dirent),
+ (char *) &dirent);
+ if (status < 1) {
+ return (0);
}
- if (dirent.namelen != 0)
- {
- char filename[dirent.namelen + 1];
- ext2fs_node_t fdiro;
- int type = FILETYPE_UNKNOWN;
-
- status = ext2fs_read_file (diro, fpos + sizeof (struct ext2_dirent), dirent.namelen, filename);
- if (status < 1)
- {
- return(0);
+ if (dirent.namelen != 0) {
+ char filename[dirent.namelen + 1];
+ ext2fs_node_t fdiro;
+ int type = FILETYPE_UNKNOWN;
+
+ status = ext2fs_read_file (diro,
+ fpos + sizeof (struct ext2_dirent),
+ dirent.namelen, filename);
+ if (status < 1) {
+ return (0);
}
fdiro = malloc (sizeof (struct ext2fs_node));
- if (!fdiro)
- {
- return(0);
+ if (!fdiro) {
+ return (0);
}
fdiro->data = diro->data;
- fdiro->ino = __le32_to_cpu(dirent.inode);
+ fdiro->ino = __le32_to_cpu (dirent.inode);
filename[dirent.namelen] = '\0';
- if (dirent.filetype != FILETYPE_UNKNOWN)
- {
+ if (dirent.filetype != FILETYPE_UNKNOWN) {
fdiro->inode_read = 0;
- if (dirent.filetype == FILETYPE_DIRECTORY)
- {
+ if (dirent.filetype == FILETYPE_DIRECTORY) {
type = FILETYPE_DIRECTORY;
- }
- else if (dirent.filetype == FILETYPE_SYMLINK)
- {
+ } else if (dirent.filetype ==
+ FILETYPE_SYMLINK) {
type = FILETYPE_SYMLINK;
+ } else if (dirent.filetype == FILETYPE_REG) {
+ type = FILETYPE_REG;
}
- else if (dirent.filetype == FILETYPE_REG)
- {
- type = FILETYPE_REG;
- }
- }
- else
- {
+ } else {
/* The filetype can not be read from the dirent, get it from inode */
- status = ext2fs_read_inode (diro->data, __le32_to_cpu (dirent.inode), &fdiro->inode);
- if (status == 0)
- {
- free(fdiro);
- return(0);
+ status = ext2fs_read_inode (diro->data,
+ __le32_to_cpu(dirent.inode),
+ &fdiro->inode);
+ if (status == 0) {
+ free (fdiro);
+ return (0);
}
fdiro->inode_read = 1;
- if ((__le16_to_cpu (fdiro->inode.mode) & FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY)
- {
+ if ((__le16_to_cpu (fdiro->inode.mode) &
+ FILETYPE_INO_MASK) ==
+ FILETYPE_INO_DIRECTORY) {
type = FILETYPE_DIRECTORY;
- }
- else if ((__le16_to_cpu (fdiro->inode.mode) & FILETYPE_INO_MASK) == FILETYPE_INO_SYMLINK)
- {
+ } else if ((__le16_to_cpu (fdiro->inode.mode)
+ & FILETYPE_INO_MASK) ==
+ FILETYPE_INO_SYMLINK) {
type = FILETYPE_SYMLINK;
- }
- else if ((__le16_to_cpu (fdiro->inode.mode) & FILETYPE_INO_MASK) == FILETYPE_INO_REG)
- {
+ } else if ((__le16_to_cpu (fdiro->inode.mode)
+ & FILETYPE_INO_MASK) ==
+ FILETYPE_INO_REG) {
type = FILETYPE_REG;
}
}
#ifdef DEBUG
- printf("iterate >%s<\n", filename);
+ printf ("iterate >%s<\n", filename);
#endif /* of DEBUG */
- if ((name != NULL) && (fnode != NULL) && (ftype != NULL))
- {
- if(strcmp(filename, name) == 0)
- {
+ if ((name != NULL) && (fnode != NULL)
+ && (ftype != NULL)) {
+ if (strcmp (filename, name) == 0) {
*ftype = type;
*fnode = fdiro;
- return(1);
+ return (1);
}
- }
- else
- {
- if (fdiro->inode_read == 0)
- {
- status = ext2fs_read_inode (diro->data, __le32_to_cpu (dirent.inode), &fdiro->inode);
- if (status == 0)
- {
- free(fdiro);
- return(0);
+ } else {
+ if (fdiro->inode_read == 0) {
+ status = ext2fs_read_inode (diro->data,
+ __le32_to_cpu (dirent.inode),
+ &fdiro->inode);
+ if (status == 0) {
+ free (fdiro);
+ return (0);
}
fdiro->inode_read = 1;
}
- switch(type)
- {
+ switch (type) {
case FILETYPE_DIRECTORY:
- printf("<DIR> ");
+ printf ("<DIR> ");
break;
case FILETYPE_SYMLINK:
- printf("<SYM> ");
+ printf ("<SYM> ");
break;
case FILETYPE_REG:
- printf(" ");
+ printf (" ");
break;
default:
- printf("<???> ");
+ printf ("<???> ");
break;
}
- printf("%10d %s\n", __le32_to_cpu(fdiro->inode.size), filename);
+ printf ("%10d %s\n",
+ __le32_to_cpu (fdiro->inode.size),
+ filename);
}
- free(fdiro);
+ free (fdiro);
}
fpos += __le16_to_cpu (dirent.direntlen);
}
- return(0);
+ return (0);
}
-static char *ext2fs_read_symlink
-(
- ext2fs_node_t node
- )
-{
- char *symlink;
+static char *ext2fs_read_symlink (ext2fs_node_t node) {
+ char *symlink;
struct ext2fs_node *diro = node;
- int status;
-
- if (!diro->inode_read)
- {
- status = ext2fs_read_inode (diro->data, diro->ino, &diro->inode);
- if (status == 0)
- {
- return(0);
+ int status;
+
+ if (!diro->inode_read) {
+ status = ext2fs_read_inode (diro->data, diro->ino,
+ &diro->inode);
+ if (status == 0) {
+ return (0);
}
}
symlink = malloc (__le32_to_cpu (diro->inode.size) + 1);
- if (!symlink)
- {
- return(0);
+ if (!symlink) {
+ return (0);
}
/* If the filesize of the symlink is bigger than
60 the symlink is stored in a separate block,
otherwise it is stored in the inode. */
- if (__le32_to_cpu (diro->inode.size) <= 60)
- {
- strncpy (symlink, diro->inode.b.symlink, __le32_to_cpu (diro->inode.size));
- }
- else
- {
- status = ext2fs_read_file (diro, 0, __le32_to_cpu (diro->inode.size), symlink);
- if (status == 0)
- {
+ if (__le32_to_cpu (diro->inode.size) <= 60) {
+ strncpy (symlink, diro->inode.b.symlink,
+ __le32_to_cpu (diro->inode.size));
+ } else {
+ status = ext2fs_read_file (diro, 0,
+ __le32_to_cpu (diro->inode.size),
+ symlink);
+ if (status == 0) {
free (symlink);
- return(0);
+ return (0);
}
}
symlink[__le32_to_cpu (diro->inode.size)] = '\0';
- return(symlink);
+ return (symlink);
}
int ext2fs_find_file1
-(
- const char *currpath,
- ext2fs_node_t currroot,
- ext2fs_node_t *currfound,
- int *foundtype
- )
-{
- char fpath[strlen (currpath) + 1];
- char *name = fpath;
- char *next;
- int status;
- int type = FILETYPE_DIRECTORY;
- ext2fs_node_t currnode = currroot;
- ext2fs_node_t oldnode = currroot;
+ (const char *currpath,
+ ext2fs_node_t currroot, ext2fs_node_t * currfound, int *foundtype) {
+ char fpath[strlen (currpath) + 1];
+ char *name = fpath;
+ char *next;
+ int status;
+ int type = FILETYPE_DIRECTORY;
+ ext2fs_node_t currnode = currroot;
+ ext2fs_node_t oldnode = currroot;
strncpy (fpath, currpath, strlen (currpath) + 1);
/* Remove all leading slashes. */
- while (*name == '/')
- {
+ while (*name == '/') {
name++;
- }
- if (!*name)
- {
+ }
+ if (!*name) {
*currfound = currnode;
- return(1);
+ return (1);
}
- for (;;)
- {
+ for (;;) {
int found;
/* Extract the actual part from the pathname. */
next = strchr (name, '/');
- if (next)
- {
+ if (next) {
/* Remove all leading slashes. */
- while (*next == '/')
- {
+ while (*next == '/') {
*(next++) = '\0';
}
}
/* At this point it is expected that the current node is a directory, check if this is true. */
- if (type != FILETYPE_DIRECTORY)
- {
+ if (type != FILETYPE_DIRECTORY) {
ext2fs_free_node (currnode, currroot);
- return(0);
+ return (0);
}
oldnode = currnode;
/* Iterate over the directory. */
found = ext2fs_iterate_dir (currnode, name, &currnode, &type);
- if (found == 0)
- {
- return(0);
+ if (found == 0) {
+ return (0);
}
- if (found == -1)
- {
+ if (found == -1) {
break;
}
/* Read in the symlink and follow it. */
- if (type == FILETYPE_SYMLINK)
- {
+ if (type == FILETYPE_SYMLINK) {
char *symlink;
/* Test if the symlink does not loop. */
- if (++symlinknest == 8)
- {
+ if (++symlinknest == 8) {
ext2fs_free_node (currnode, currroot);
- ext2fs_free_node (oldnode, currroot);
- return(0);
+ ext2fs_free_node (oldnode, currroot);
+ return (0);
}
symlink = ext2fs_read_symlink (currnode);
ext2fs_free_node (currnode, currroot);
- if (!symlink)
- {
+ if (!symlink) {
ext2fs_free_node (oldnode, currroot);
- return(0);
+ return (0);
}
#ifdef DEBUG
- printf("Got symlink >%s<\n",symlink);
+ printf ("Got symlink >%s<\n", symlink);
#endif /* of DEBUG */
/* The symlink is an absolute path, go back to the root inode. */
- if (symlink[0] == '/')
- {
+ if (symlink[0] == '/') {
ext2fs_free_node (oldnode, currroot);
oldnode = &ext2fs_root->diropen;
}
/* Lookup the node the symlink points to. */
- status = ext2fs_find_file1 (symlink, oldnode, &currnode, &type);
+ status = ext2fs_find_file1 (symlink, oldnode,
+ &currnode, &type);
free (symlink);
- if (status == 0)
- {
+ if (status == 0) {
ext2fs_free_node (oldnode, currroot);
- return(0);
+ return (0);
}
}
ext2fs_free_node (oldnode, currroot);
/* Found the node! */
- if (!next || *next == '\0')
- {
+ if (!next || *next == '\0') {
*currfound = currnode;
*foundtype = type;
- return(1);
+ return (1);
}
name = next;
}
- return(-1);
+ return (-1);
}
int ext2fs_find_file
-(
- const char *path,
- ext2fs_node_t rootnode,
- ext2fs_node_t *foundnode,
- int expecttype
- )
-{
+ (const char *path,
+ ext2fs_node_t rootnode, ext2fs_node_t * foundnode, int expecttype) {
int status;
int foundtype = FILETYPE_DIRECTORY;
symlinknest = 0;
- if (!path || path[0] != '/')
- {
- return(0);
+ if (!path || path[0] != '/') {
+ return (0);
}
- status = ext2fs_find_file1(path, rootnode, foundnode, &foundtype);
- if (status == 0)
- {
- return(0);
+ status = ext2fs_find_file1 (path, rootnode, foundnode, &foundtype);
+ if (status == 0) {
+ return (0);
}
/* Check if the node that was found was of the expected type. */
- if ((expecttype == FILETYPE_REG) && (foundtype != expecttype))
- {
- return(0);
- }
- else if ((expecttype == FILETYPE_DIRECTORY) && (foundtype != expecttype))
- {
- return(0);
+ if ((expecttype == FILETYPE_REG) && (foundtype != expecttype)) {
+ return (0);
+ } else if ((expecttype == FILETYPE_DIRECTORY)
+ && (foundtype != expecttype)) {
+ return (0);
}
- return(1);
+ return (1);
}
-int ext2fs_ls
-(
- char *dirname
- )
-{
+int ext2fs_ls (char *dirname) {
ext2fs_node_t dirnode;
- int status;
-
- if (ext2fs_root == NULL)
- {
- return(0);
- }
-
- status = ext2fs_find_file(dirname, &ext2fs_root->diropen, &dirnode, FILETYPE_DIRECTORY);
- if (status != 1)
- {
- printf("** Can not find directory. **\n");
- return(1);
- }
- ext2fs_iterate_dir(dirnode, NULL, NULL, NULL);
- ext2fs_free_node(dirnode, &ext2fs_root->diropen);
- return(0);
+ int status;
+
+ if (ext2fs_root == NULL) {
+ return (0);
+ }
+
+ status = ext2fs_find_file (dirname, &ext2fs_root->diropen, &dirnode,
+ FILETYPE_DIRECTORY);
+ if (status != 1) {
+ printf ("** Can not find directory. **\n");
+ return (1);
+ }
+ ext2fs_iterate_dir (dirnode, NULL, NULL, NULL);
+ ext2fs_free_node (dirnode, &ext2fs_root->diropen);
+ return (0);
}
-int ext2fs_open
-(
- char *filename
- )
-{
- ext2fs_node_t fdiro = NULL;
- int status;
- int len;
+int ext2fs_open (char *filename) {
+ ext2fs_node_t fdiro = NULL;
+ int status;
+ int len;
- if (ext2fs_root == NULL)
- {
- return(0);
+ if (ext2fs_root == NULL) {
+ return (0);
}
ext2fs_file = NULL;
- status = ext2fs_find_file (filename, &ext2fs_root->diropen, &fdiro, FILETYPE_REG);
- if (status == 0)
- {
+ status = ext2fs_find_file (filename, &ext2fs_root->diropen, &fdiro,
+ FILETYPE_REG);
+ if (status == 0) {
goto fail;
}
- if (!fdiro->inode_read)
- {
- status = ext2fs_read_inode (fdiro->data, fdiro->ino, &fdiro->inode);
- if (status == 0)
- {
+ if (!fdiro->inode_read) {
+ status = ext2fs_read_inode (fdiro->data, fdiro->ino,
+ &fdiro->inode);
+ if (status == 0) {
goto fail;
}
}
len = __le32_to_cpu (fdiro->inode.size);
ext2fs_file = fdiro;
- return(len);
+ return (len);
- fail:
- ext2fs_free_node(fdiro, &ext2fs_root->diropen);
- return(0);
+ fail:
+ ext2fs_free_node (fdiro, &ext2fs_root->diropen);
+ return (0);
}
-int ext2fs_close
-(
- void
- )
-{
- if ((ext2fs_file != NULL) && (ext2fs_root != NULL))
- {
- ext2fs_free_node(ext2fs_file, &ext2fs_root->diropen);
+int ext2fs_close (void
+ ) {
+ if ((ext2fs_file != NULL) && (ext2fs_root != NULL)) {
+ ext2fs_free_node (ext2fs_file, &ext2fs_root->diropen);
ext2fs_file = NULL;
}
- if (ext2fs_root != NULL)
- {
- free(ext2fs_root);
- ext2fs_root = NULL;
- }
- if (indir1_block != NULL)
- {
- free(indir1_block);
- indir1_block = NULL;
- indir1_size = 0;
- indir1_blkno = -1;
- }
- if (indir2_block != NULL)
- {
- free(indir2_block);
- indir2_block = NULL;
- indir2_size = 0;
- indir2_blkno = -1;
- }
- return(0);
+ if (ext2fs_root != NULL) {
+ free (ext2fs_root);
+ ext2fs_root = NULL;
+ }
+ if (indir1_block != NULL) {
+ free (indir1_block);
+ indir1_block = NULL;
+ indir1_size = 0;
+ indir1_blkno = -1;
+ }
+ if (indir2_block != NULL) {
+ free (indir2_block);
+ indir2_block = NULL;
+ indir2_size = 0;
+ indir2_blkno = -1;
+ }
+ return (0);
}
-int ext2fs_read
-(
- char *buf,
- unsigned len
- )
-{
+int ext2fs_read (char *buf, unsigned len) {
int status;
- if (ext2fs_root == NULL)
- {
- return(0);
+ if (ext2fs_root == NULL) {
+ return (0);
}
- if (ext2fs_file == NULL)
- {
- return(0);
+ if (ext2fs_file == NULL) {
+ return (0);
}
- status = ext2fs_read_file(ext2fs_file, 0, len, buf);
- return(status);
+ status = ext2fs_read_file (ext2fs_file, 0, len, buf);
+ return (status);
}
-int ext2fs_mount
-(
- unsigned part_length
- )
-{
+int ext2fs_mount (unsigned part_length) {
struct ext2_data *data;
- int status;
+ int status;
data = malloc (sizeof (struct ext2_data));
- if (!data)
- {
- return(0);
+ if (!data) {
+ return (0);
}
/* Read the superblock. */
- status = ext2fs_devread (1 * 2, 0, sizeof (struct ext2_sblock), (char *) &data->sblock);
- if (status == 0)
- {
+ status = ext2fs_devread (1 * 2, 0, sizeof (struct ext2_sblock),
+ (char *) &data->sblock);
+ if (status == 0) {
goto fail;
}
/* Make sure this is an ext2 filesystem. */
- if (__le16_to_cpu (data->sblock.magic) != EXT2_MAGIC)
- {
+ if (__le16_to_cpu (data->sblock.magic) != EXT2_MAGIC) {
goto fail;
}
- data->diropen.data = data;
- data->diropen.ino = 2;
- data->diropen.inode_read = 1;
- data->inode = &data->diropen.inode;
+ data->diropen.data = data;
+ data->diropen.ino = 2;
+ data->diropen.inode_read = 1;
+ data->inode = &data->diropen.inode;
status = ext2fs_read_inode (data, 2, data->inode);
- if (status == 0)
- {
+ if (status == 0) {
goto fail;
}
ext2fs_root = data;
- return(1);
+ return (1);
- fail:
- printf("Failed to mount ext2 filesystem...\n");
- free(data);
+fail:
+ printf ("Failed to mount ext2 filesystem...\n");
+ free (data);
ext2fs_root = NULL;
- return(0);
+ return (0);
}
#endif /* CFG_CMD_EXT2FS */
generated by cgit v1.1 at 2024-11-22 10:11:46 +0000