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Yet incomplete implementation of IsoNode cloning.

Browse Source 
(Commited to avoid tangling with upcomming 
 iso_write_opts_set_no_dummy_block_adr())
This commit is contained in:
Thomas Schmitt 2011-01-25 10:50:37 +01:00
parent 92073c45ef
commit a3eeda3d23
15 changed files with 613 additions and 53 deletions
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14
libisofs/ecma119.h
View File

@ -239,6 +239,11 @@ struct iso_write_opts {
unsigned int replace_uid :2;
unsigned int replace_gid :2;
mode_t dir_mode; /** Mode to use on dirs when replace_dir_mode == 2. */
mode_t file_mode; /** Mode to use on files when replace_file_mode == 2. */
uid_t uid; /** uid to use when replace_uid == 2. */
gid_t gid; /** gid to use when replace_gid == 2. */
/**
* Extra Caution: This option breaks any assumptions about names that
* are supported by ECMA-119 specifications.
@ -254,11 +259,6 @@ struct iso_write_opts {
*/
unsigned int untranslated_name_len;
mode_t dir_mode; /** Mode to use on dirs when replace_dir_mode == 2. */
mode_t file_mode; /** Mode to use on files when replace_file_mode == 2. */
uid_t uid; /** uid to use when replace_uid == 2. */
gid_t gid; /** gid to use when replace_gid == 2. */
/**
* 0 to use IsoNode timestamps, 1 to use recording time, 2 to use
* values from timestamp field. This has only meaning if RR extensions
@ -479,14 +479,14 @@ struct ecma119_image
unsigned int replace_dir_mode :1;
unsigned int replace_timestamps :1;
unsigned int untranslated_name_len;
uid_t uid;
gid_t gid;
mode_t file_mode;
mode_t dir_mode;
time_t timestamp;
unsigned int untranslated_name_len;
/**
* if sort files or not. Sorting is based of the weight of each file
*/

35
libisofs/filters/external.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2009 Thomas Schmitt
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -20,6 +20,7 @@
#include "../libisofs.h"
#include "../filter.h"
#include "../fsource.h"
#include "../stream.h"
#include <sys/types.h>
#include <sys/time.h>
@ -598,6 +599,33 @@ IsoStream *extf_get_input_stream(IsoStream *stream, int flag)
return data->orig;
}
static
int extf_clone_stream(IsoStream *old_stream, IsoStream **new_stream, int flag)
{
int ret;
IsoStream *new_input_stream, *stream;
ExternalFilterStreamData *stream_data, *old_stream_data;
stream_data = calloc(1, sizeof(ExternalFilterStreamData));
if (stream_data == NULL)
return ISO_OUT_OF_MEM;
ret = iso_stream_clone_filter_common(old_stream, &stream,
&new_input_stream, 0);
if (ret < 0) {
free((char *) stream_data);
return ret;
}
old_stream_data = (ExternalFilterStreamData *) old_stream->data;
stream_data->id = ++extf_ino_id;
stream_data->orig = new_input_stream;
stream_data->cmd = old_stream_data->cmd;
stream_data->cmd->refcount++;
stream_data->size = old_stream_data->size;
stream_data->running = NULL;
stream->data = stream_data;
*new_stream = stream;
return ISO_SUCCESS;
}
static
int extf_cmp_ino(IsoStream *s1, IsoStream *s2);
@ -605,7 +633,7 @@ int extf_cmp_ino(IsoStream *s1, IsoStream *s2);
IsoStreamIface extf_stream_class = {
3,
4,
"extf",
extf_stream_open,
extf_stream_close,
@ -616,7 +644,8 @@ IsoStreamIface extf_stream_class = {
extf_stream_free,
extf_update_size,
extf_get_input_stream,
extf_cmp_ino
extf_cmp_ino,
extf_clone_stream
};

40
libisofs/filters/gzip.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2009 Thomas Schmitt
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -25,6 +25,7 @@
#include "../filter.h"
#include "../fsource.h"
#include "../util.h"
#include "../stream.h"
#include <sys/types.h>
#include <sys/time.h>
@ -153,6 +154,7 @@ static int gzip_compression_level = 6;
/*
* The data payload of an individual Gzip Filter IsoStream
*/
/* IMPORTANT: Any change must be reflected by >>> _clone() */
typedef struct
{
IsoStream *orig;
@ -529,12 +531,38 @@ IsoStream *gzip_get_input_stream(IsoStream *stream, int flag)
}
static
int gzip_clone_stream(IsoStream *old_stream, IsoStream **new_stream, int flag)
{
int ret;
IsoStream *new_input_stream, *stream;
GzipFilterStreamData *stream_data, *old_stream_data;
stream_data = calloc(1, sizeof(GzipFilterStreamData));
if (stream_data == NULL)
return ISO_OUT_OF_MEM;
ret = iso_stream_clone_filter_common(old_stream, &stream,
&new_input_stream, 0);
if (ret < 0) {
free((char *) stream_data);
return ret;
}
old_stream_data = (GzipFilterStreamData *) old_stream->data;
stream_data->orig = new_input_stream;
stream_data->size = old_stream_data->size;
stream_data->running = NULL;
stream_data->id = ++gzip_ino_id;
stream->data = stream_data;
*new_stream = stream;
return ISO_SUCCESS;
}
static
int gzip_cmp_ino(IsoStream *s1, IsoStream *s2);
IsoStreamIface gzip_stream_compress_class = {
3,
4,
"gzip",
gzip_stream_open,
gzip_stream_close,
@ -545,12 +573,13 @@ IsoStreamIface gzip_stream_compress_class = {
gzip_stream_free,
gzip_update_size,
gzip_get_input_stream,
gzip_cmp_ino
gzip_cmp_ino,
gzip_clone_stream
};
IsoStreamIface gzip_stream_uncompress_class = {
3,
4,
"pizg",
gzip_stream_open,
gzip_stream_close,
@ -561,7 +590,8 @@ IsoStreamIface gzip_stream_uncompress_class = {
gzip_stream_free,
gzip_update_size,
gzip_get_input_stream,
gzip_cmp_ino
gzip_cmp_ino,
gzip_clone_stream
};

63
libisofs/filters/zisofs.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2009 Thomas Schmitt
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -22,6 +22,7 @@
#include "../filter.h"
#include "../fsource.h"
#include "../util.h"
#include "../stream.h"
#include <sys/types.h>
#include <sys/time.h>
@ -167,6 +168,7 @@ static int ziso_compression_level = 6;
/*
* The common data payload of an individual Zisofs Filter IsoStream
* IMPORTANT: Any change must be reflected by ziso_clone_stream.
*/
typedef struct
{
@ -183,6 +185,7 @@ typedef struct
/*
* The data payload of an individual Zisofs Filter Compressor IsoStream
* IMPORTANT: Any change must be reflected by ziso_clone_stream.
*/
typedef struct
{
@ -198,6 +201,7 @@ typedef struct
/*
* The data payload of an individual Zisofs Filter Uncompressor IsoStream
* IMPORTANT: Any change must be reflected by ziso_clone_stream.
*/
typedef struct
{
@ -779,13 +783,60 @@ IsoStream *ziso_get_input_stream(IsoStream *stream, int flag)
return data->orig;
}
static
int ziso_clone_stream(IsoStream *old_stream, IsoStream **new_stream, int flag)
{
int ret;
IsoStream *new_input_stream = NULL, *stream = NULL;
ZisofsFilterStreamData *stream_data, *old_stream_data;
ZisofsUncomprStreamData *uncompr, *old_uncompr;
ZisofsComprStreamData *compr, *old_compr;
ret = iso_stream_clone_filter_common(old_stream, &stream,
&new_input_stream, 0);
if (ret < 0)
return ret;
if (old_stream->class->read == &ziso_stream_uncompress) {
uncompr = calloc(1, sizeof(ZisofsUncomprStreamData));
if (uncompr == NULL)
goto no_mem;
stream_data = (ZisofsFilterStreamData *) uncompr;
old_uncompr = (ZisofsUncomprStreamData *) old_stream->data;
uncompr->header_size_div4 = old_uncompr->header_size_div4;
uncompr->block_size_log2 = old_uncompr->block_size_log2;
} else {
compr = calloc(1, sizeof(ZisofsComprStreamData));
if (compr == NULL)
goto no_mem;
stream_data = (ZisofsFilterStreamData *) compr;
old_compr = (ZisofsComprStreamData *) old_stream->data;
compr->orig_size = old_compr->orig_size;
compr->block_pointers = NULL;
}
old_stream_data = (ZisofsFilterStreamData *) old_stream->data;
stream_data->orig = new_input_stream;
stream_data->size = old_stream_data->size;
stream_data->running = NULL;
stream_data->id = ++ziso_ino_id;
stream->data = stream_data;
*new_stream = stream;
return ISO_SUCCESS;
no_mem:
if (new_input_stream != NULL)
iso_stream_unref(new_input_stream);
if (stream != NULL)
iso_stream_unref(stream);
return ISO_OUT_OF_MEM;
}
static
int ziso_cmp_ino(IsoStream *s1, IsoStream *s2);
IsoStreamIface ziso_stream_compress_class = {
3,
4,
"ziso",
ziso_stream_open,
ziso_stream_close,
@ -796,12 +847,13 @@ IsoStreamIface ziso_stream_compress_class = {
ziso_stream_free,
ziso_update_size,
ziso_get_input_stream,
ziso_cmp_ino
ziso_cmp_ino,
ziso_clone_stream
};
IsoStreamIface ziso_stream_uncompress_class = {
3,
4,
"osiz",
ziso_stream_open,
ziso_stream_close,
@ -812,7 +864,8 @@ IsoStreamIface ziso_stream_uncompress_class = {
ziso_stream_free,
ziso_update_size,
ziso_get_input_stream,
ziso_cmp_ino
ziso_cmp_ino,
ziso_clone_stream
};

98
libisofs/fs_image.c
View File

@ -1,6 +1,6 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2009 - 2010 Thomas Schmitt
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -317,6 +317,7 @@ typedef struct
typedef struct image_fs_data ImageFileSourceData;
/* IMPORTANT: Any change must be reflected by iso_ifs_source_clone */
struct image_fs_data
{
IsoImageFilesystem *fs; /**< reference to the image it belongs to */
@ -1987,6 +1988,101 @@ void ifs_fs_free(IsoFilesystem *fs)
free(data);
}
int iso_ifs_source_clone(IsoFileSource *old_source,
IsoFileSource **new_source, int flag)
{
IsoFileSource *src = NULL;
ImageFileSourceData *old_data, *new_data = NULL;
char *new_name = NULL;
struct iso_file_section *new_sections = NULL;
unsigned char *new_aa_string;
size_t aa_size;
int i, new_aa_length = 0;
old_data = (ImageFileSourceData *) old_source->data;
*new_source = NULL;
src = calloc(1, sizeof(IsoFileSource));
if (src == NULL)
goto no_mem;
new_data = calloc(1, sizeof(ImageFileSourceData));
if (new_data == NULL)
goto no_mem;
new_name = strdup(old_data->name);
if (new_name == NULL) {
free((char *) src);
free((char *) new_data);
return ISO_OUT_OF_MEM;
}
if (old_data->nsections > 0) {
new_sections = calloc(old_data->nsections,
sizeof(struct iso_file_section));
if (new_sections == NULL)
goto no_mem;
}
if (old_data->aa_string != NULL) {
aa_size = aaip_count_bytes(old_data->aa_string, 0);
if (aa_size > 0) {
new_aa_string = calloc(1, aa_size);
if (new_aa_string == NULL)
goto no_mem;
}
}
new_data->fs = old_data->fs;
iso_filesystem_ref(new_data->fs);
/* Re-using the directory structure of the original image tree is
supposed to not spoil independence of the cloned IsoFileSource because
that directory structure does not change as long as the loaded
image exists.
The .readdir() method of IsoFileSourceIface will not list the clones
but rather the originals.
It is unclear anyway, how it should work with the root of a cloned
IsoNode tree which would need to be implanted fakely into the
IsoFilesystem.
Currently there is the technical problem that a new parent would have
to be passed through the IsoStream cloning call, which cannot have
knowledge of a newly created IsoSource parent.
*/
new_data->parent = old_data->parent;
iso_file_source_ref(new_data->parent);
memcpy(&(new_data->info), &(old_data->info), sizeof(struct stat));
new_data->name = new_name;
new_data->sections = new_sections;
new_data->nsections = old_data->nsections;
for (i = 0; i < new_data->nsections; i++)
memcpy(new_data->sections + i, old_data->sections + i,
sizeof(struct iso_file_section));
new_data->opened = old_data->opened;
#ifdef Libisofs_with_zliB
new_data->header_size_div4 = old_data->header_size_div4;
new_data->block_size_log2 = old_data->block_size_log2;
new_data->uncompressed_size = old_data->uncompressed_size;
#endif
new_data->data.content = NULL;
if (new_aa_length > 0)
memcpy(new_aa_string, old_data->aa_string, new_aa_length);
new_data->aa_string = new_aa_string;
*new_source = src;
return ISO_SUCCESS;
no_mem:;
if (src != NULL)
free((char *) src);
if (new_data != NULL)
free((char *) new_data);
if (new_name != NULL)
free(new_name);
if (new_sections != NULL)
free((char *) new_sections);
if (new_aa_string != NULL)
free((char *) new_aa_string);
return ISO_OUT_OF_MEM;
}
/**
* Read the SUSP system user entries of the "." entry of the root directory,
* indentifying when Rock Ridge extensions are being used.

11
libisofs/fsource.h
View File

@ -1,6 +1,6 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2009 Thomas Schmitt
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -33,9 +33,16 @@
int iso_local_filesystem_new(IsoFilesystem **fs);
/* Rank two IsoFileSource by their eventual old image LBAs.
/* Rank two IsoFileSource of ifs_class by their eventual old image LBAs.
Other IsoFileSource classes will be ranked only roughly.
*/
int iso_ifs_sections_cmp(IsoFileSource *s1, IsoFileSource *s2, int flag);
/* Create an independent copy of an ifs_class IsoFileSource.
*/
int iso_ifs_source_clone(IsoFileSource *old_source, IsoFileSource **new_source,
int flag);
#endif /*LIBISO_FSOURCE_H_*/

144
libisofs/libisofs.h
View File

@ -807,6 +807,8 @@ struct IsoStream_Iface
* get_input_stream() added. A filter stream must have version 2.
* Version 3 (since 0.6.20)
* compare() added. A filter stream should have version 3.
* Version 4 (since 1.0.2)
* clone_stream() added.
*/
int version;
@ -913,7 +915,7 @@ struct IsoStream_Iface
* @param stream
* The eventual filter stream to be inquired.
* @param flag
* Bitfield for control purposes. Submit 0 for now.
* Bitfield for control purposes. 0 means normal behavior.
* @return
* The input stream, if one exists. Elsewise NULL.
* No extra reference to the stream is taken by this call.
@ -928,33 +930,32 @@ struct IsoStream_Iface
* produce the same output. If in any doubt, then this comparison should
* indicate no match. A match might allow hardlinking of IsoFile objects.
*
* This function has to establish an equivalence and order relation:
* If this function cannot accept one of the given stream types, then
* the decision must be delegated to
* iso_stream_cmp_ino(s1, s2, 1);
* This is also appropriate if one has reason to implement stream.cmp_ino()
* without having an own special comparison algorithm.
*
* With filter streams the decision whether the underlying chains of
* streams match should be delegated to
* iso_stream_cmp_ino(iso_stream_get_input_stream(s1, 0),
* iso_stream_get_input_stream(s2, 0), 0);
*
* The stream.cmp_ino() function has to establish an equivalence and order
* relation:
* cmp_ino(A,A) == 0
* cmp_ino(A,B) == -cmp_ino(B,A)
* if cmp_ino(A,B) == 0 && cmp_ino(B,C) == 0 then cmp_ino(A,C) == 0
* if cmp_ino(A,B) < 0 && cmp_ino(B,C) < 0 then cmp_ino(A,C) < 0
*
* A big hazard to the last constraint are tests which do not apply to some
* types of streams. In this case for any A that is applicable and any B
* that is not applicable, cmp_ino(A,B) must have the same non-zero
* result. I.e. a pair of applicable and non-applicable streams must
* return that non-zero result before the test for a pair of applicable
* streams would happen.
* types of streams.Thus it is mandatory to let iso_stream_cmp_ino(s1,s2,1)
* decide in this case.
*
* A function s1.(*cmp_ino)() must only accept stream s2 if function
* s2.(*cmp_ino)() would accept s1. Best is to accept only the own stream
* type or to have the same function for a family of similar stream types.
*
* If the function cannot accept one of the given stream types, then
* the decision must be delegated to
* iso_stream_cmp_ino(s1, s2, 1);
* This is also appropriate if one has reason to implement stream.cmp_ino()
* without special comparison algorithm.
* With filter streams the decision whether the underlying chains of
* streams match should be delegated to
* iso_stream_cmp_ino(iso_stream_get_input_stream(s1, 0),
* iso_stream_get_input_stream(s2, 0), 0);
*
* @param s1
* The first stream to compare. Expect foreign stream types.
* @param s2
@ -967,6 +968,23 @@ struct IsoStream_Iface
*/
int (*cmp_ino)(IsoStream *s1, IsoStream *s2);
/**
* Produce a copy of a stream. It must be possible to operate both stream
* objects concurrently.
*
* @param old_stream
* The existing stream object to be copied
* @param new_stream
* Will return a pointer to the copy
* @param flag
* Bitfield for control purposes. 0 means normal behavior.
*
* @since 1.0.2
* Present if .version is 4 or higher.
*/
int (*clone_stream)(IsoStream *old_stream, IsoStream **new_stream,
int flag);
};
#ifndef __cplusplus
@ -3639,23 +3657,39 @@ int iso_dir_iter_take(IsoDirIter *iter);
/**
* Removes a child from a directory during an iteration and unref() it.
* It's like iso_node_remove(), but to be used during a directory iteration.
* The node removed will be the last returned by the iteration.
* Like iso_node_remove(), but to be used during a directory iteration.
* The node removed will be the one returned by the previous iteration.
*
* If you call this function twice without calling iso_dir_iter_next between
* them is not allowed and you will get an ISO_ERROR in second call.
* It is not allowed to call this function twice without calling
* iso_dir_iter_next inbetween.
*
* @return
* 1 on succes, < 0 error
* Possible errors:
* ISO_NULL_POINTER, if iter is NULL
* ISO_ERROR, on wrong iter usage, for example by call this before
* ISO_ERROR, on wrong iter usage, for example by calling this before
* iso_dir_iter_next.
*
* @since 0.6.2
*/
int iso_dir_iter_remove(IsoDirIter *iter);
/**
* Removes a node by iso_node_remove() or iso_dir_iter_remove(). If the node
* is a directory then the whole tree of nodes underneath is removed too.
*
* @param node
* The node to be removed.
* @param iter
* If not NULL, then the node will be removed by iso_dir_iter_remove(iter)
* else it will be removed by iso_node_remove(node).
* @return
* 1 is success, <0 indicates error
*
* @since 1.0.2
*/
int iso_node_remove_tree(IsoNode *node, IsoDirIter *boss_iter);
/**
* @since 0.6.4
@ -4392,6 +4426,45 @@ int iso_tree_add_new_cut_out_node(IsoImage *image, IsoDir *parent,
off_t offset, off_t size,
IsoNode **node);
/**
* >>> INCOMPLETLY IMPLEMENTED YET. DO NOT USE !
*
* Create a copy of the given node under a different path. If the node is
* actually a directory then clone its whole subtree.
* This call may fail because an IsoFile is encountered which gets fed by an
* IsoStream which cannot be cloned. See also IsoStream_Iface method
* clone_stream().
* Surely clonable node types are:
* IsoDir,
* >>> IsoSymlink,
* >>> IsoSpecial,
* IsoFile from a loaded ISO image without filter streams,
* >>> IsoFile referring to local filesystem files without filter streams.
* Silently ignored are nodes of type IsoBoot.
* An IsoFile node with filter streams can be cloned if all those filters
* are clonable and the node would be clonable without filter.
* Clonable filter streams are created by:
* iso_file_add_zisofs_filter()
* iso_file_add_gzip_filter()
* iso_file_add_external_filter()
*
* @param node
* The node to be cloned.
* @param new_parent
* The existing directory node where to insert the cloned node.
* @param new_name
* The name for the cloned node. It must not yet exist in new_parent.
* @param new_node
* Will return a reference to the newly created clone.
* @param flag
* Unused yet. Submit 0.
*
* @since 1.0.2
*/
int iso_tree_clone(IsoNode *node,
IsoDir *new_parent, char *new_name, IsoNode **new_node,
int flag);
/**
* Add the contents of a dir to a given directory of the iso tree.
*
@ -5191,6 +5264,30 @@ char *iso_stream_get_source_path(IsoStream *stream, int flag);
*/
int iso_stream_cmp_ino(IsoStream *s1, IsoStream *s2, int flag);
/**
* Produce a copy of a stream. It must be possible to operate both stream
* objects concurrently. The success of this function depends on the
* existence of a IsoStream_Iface.clone_stream() method with the stream
* and with its eventual subordinate streams.
* See iso_tree_clone() for a list of surely clonable built-in streams.
*
* @param old_stream
* The existing stream object to be copied
* @param new_stream
* Will return a pointer to the copy
* @param flag
* Bitfield for control purposes. Submit 0 for now.
* @return
* >0 means success
* ISO_STREAM_NO_CLONE is issued if no .clone_stream() exists
* other error return values < 0 may occur depending on kind of stream
*
* @since 1.0.2
*/
int iso_stream_clone(IsoStream *old_stream, IsoStream **new_stream, int flag);
/* --------------------------------- AAIP --------------------------------- */
/**
@ -6496,6 +6593,9 @@ int iso_md5_match(char first_md5[16], char second_md5[16]);
(FAILURE, HIGH, -373) */
#define ISO_NAME_NEEDS_TRANSL 0xE830FE8B
/** Data file input stream object offers no cloning method
(FAILURE, HIGH, -374) */
#define ISO_STREAM_NO_CLONE 0xE830FE8A
/* Internal developer note:
Place new error codes directly above this comment.

3
libisofs/libisofs.ver
View File

@ -166,6 +166,7 @@ iso_node_get_xinfo;
iso_node_lookup_attr;
iso_node_ref;
iso_node_remove;
iso_node_remove_tree;
iso_node_remove_xinfo;
iso_node_set_acl_text;
iso_node_set_atime;
@ -210,6 +211,7 @@ iso_set_local_charset;
iso_set_msgs_severities;
iso_sev_to_text;
iso_special_get_dev;
iso_stream_clone;
iso_stream_close;
iso_stream_cmp_ino;
iso_stream_get_external_filter;
@ -235,6 +237,7 @@ iso_tree_add_new_node;
iso_tree_add_new_special;
iso_tree_add_new_symlink;
iso_tree_add_node;
iso_tree_clone;
iso_tree_get_follow_symlinks;
iso_tree_get_ignore_hidden;
iso_tree_get_ignore_special;

3
libisofs/messages.c
View File

@ -1,5 +1,6 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -363,6 +364,8 @@ const char *iso_error_to_msg(int errcode)
return "Displacement offset leads outside 32 bit range";
case ISO_NAME_NEEDS_TRANSL:
return "File name cannot be written into ECMA-119 untranslated";
case ISO_STREAM_NO_CLONE:
return "Data file input stream object offers no cloning method";
default:
return "Unknown error";
}

32
libisofs/node.c
View File

@ -1,6 +1,6 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2009 Thomas Schmitt
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -686,6 +686,36 @@ int iso_node_remove(IsoNode *node)
return ret;
}
/* API */
int iso_node_remove_tree(IsoNode *node, IsoDirIter *boss_iter)
{
IsoDirIter *iter = NULL;
IsoNode *sub_node;
int ret;
if (node->type != LIBISO_DIR) {
ret = iso_dir_get_children((IsoDir *) node, &iter);
if (ret < 0)
goto ex;
while(1) {
ret = iso_dir_iter_next(iter, &sub_node);
if (ret == 0)
break;
ret = iso_node_remove_tree(sub_node, iter);
if (ret < 0)
goto ex;
}
}
if (boss_iter != NULL)
ret = iso_dir_iter_remove(boss_iter);
else
ret = iso_node_remove(node);
ex:;
if (iter != NULL)
iso_dir_iter_free(iter);
return ret;
}
/*
* Get the parent of the given iso tree node. No extra ref is added to the
* returned directory, you must take your ref. with iso_node_ref() if you

3
libisofs/node.h
View File

@ -1,6 +1,6 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2009 Thomas Schmitt
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -121,6 +121,7 @@ struct Iso_Dir
IsoNode *children; /**< list of children. ptr to first child */
};
/* IMPORTANT: Any change must be reflected by iso_tree_clone_file. */
struct Iso_File
{
IsoNode node;

4
libisofs/rockridge_read.c
View File

@ -443,7 +443,7 @@ int read_rr_PN(struct susp_sys_user_entry *pn, struct stat *st)
}
/* AA is the field signature of AAIP versions < 2.0
/* AA is the obsolete field signature of AAIP versions < 2.0
*/
int read_aaip_AA(struct susp_sys_user_entry *sue,
unsigned char **aa_string, size_t *aa_size, size_t *aa_len,
@ -514,7 +514,7 @@ int read_aaip_AA(struct susp_sys_user_entry *sue,
}
/* AL is the obsolete field signature of AAIP versions >= 2.0
/* AL is the field signature of AAIP versions >= 2.0
*/
int read_aaip_AL(struct susp_sys_user_entry *sue,
unsigned char **aa_string, size_t *aa_size, size_t *aa_len,

100
libisofs/stream.c
View File

@ -1,6 +1,6 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2009 Thomas Schmitt
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -157,8 +157,60 @@ int fsrc_update_size(IsoStream *stream)
return ISO_SUCCESS;
}
IsoStream *fsrc_get_input_stream(IsoStream *stream, int flag)
{
return NULL;
}
int fsrc_cmp_ino(IsoStream *s1, IsoStream *s2)
{
int ret;
/* <<< provisory */
ret = iso_stream_cmp_ino(s1, s2, 1);
/* >>> find out whether both streams point to the same image file */;
return ret;
}
int fsrc_clone_stream(IsoStream *old_stream, IsoStream **new_stream,
int flag)
{
FSrcStreamData *data, *new_data;
IsoStream *stream;
int ret;
*new_stream = NULL;
stream = calloc(1, sizeof(IsoStream));
if (stream == NULL)
return ISO_OUT_OF_MEM;
new_data = calloc(1, sizeof(FSrcStreamData));
if (new_data == NULL) {
free((char *) stream);
return ISO_OUT_OF_MEM;
}
*new_stream = stream;
data = (FSrcStreamData*) old_stream->data;
stream->class = old_stream->class;
stream->refcount = 1;
stream->data = new_data;
ret = iso_ifs_source_clone(data->src, &(new_data->src), 0);
if (ret < 0) {
free((char *) stream);
free((char *) new_data);
return ret;
}
new_data->dev_id = data->dev_id;
new_data->ino_id = data->ino_id;
new_data->size = data->size;
return ISO_SUCCESS;
}
IsoStreamIface fsrc_stream_class = {
1, /* update_size is defined for this stream */
4, /* .clone_stream() is defined for this stream */
"fsrc",
fsrc_open,
fsrc_close,
@ -167,7 +219,10 @@ IsoStreamIface fsrc_stream_class = {
fsrc_is_repeatable,
fsrc_get_id,
fsrc_free,
fsrc_update_size
fsrc_update_size,
fsrc_get_input_stream,
fsrc_cmp_ino,
fsrc_clone_stream
};
int iso_file_source_stream_new(IsoFileSource *src, IsoStream **stream)
@ -924,3 +979,42 @@ ex:;
iso_md5_end(&ctx, md5);
return res;
}
/* API */
int iso_stream_clone(IsoStream *old_stream, IsoStream **new_stream, int flag)
{
int ret;
if (old_stream->class->version < 4)
return ISO_STREAM_NO_CLONE;
ret = old_stream->class->clone_stream(old_stream, new_stream, 0);
return ret;
}
int iso_stream_clone_filter_common(IsoStream *old_stream,
IsoStream **new_stream,
IsoStream **new_input, int flag)
{
IsoStream *stream, *input_stream;
int ret;
*new_stream = NULL;
*new_input = NULL;
input_stream = iso_stream_get_input_stream(old_stream, 0);
if (input_stream == NULL)
return ISO_STREAM_NO_CLONE;
stream = calloc(1, sizeof(IsoStream));
if (stream == NULL)
return ISO_OUT_OF_MEM;
ret = iso_stream_clone(input_stream, new_input, 0);
if (ret < 0) {
free((char *) stream);
return ret;
}
stream->class = old_stream->class;
stream->refcount = 1;
stream->data = NULL;
*new_stream = stream;
return ISO_SUCCESS;
}

18
libisofs/stream.h
View File

@ -1,6 +1,6 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2009 Thomas Schmitt
* Copyright (c) 2009 - 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -15,6 +15,7 @@
*/
#include "fsource.h"
/* IMPORTANT: Any change must be reflected by fsrc_clone_stream */
typedef struct
{
IsoFileSource *src;
@ -94,5 +95,20 @@ int iso_stream_read_buffer(IsoStream *stream, char *buf, size_t count,
int iso_stream_make_md5(IsoStream *stream, char md5[16], int flag);
/**
* Create a clone of the input stream of old_stream and a roughly initialized
* clone of old_stream which has the same class and refcount 1. Its data
* pointer will be NULL and needs to be filled by an expert which knows how
* to clone the data of old_stream.
* @param old_stream The existing stream which is in process of cloning
* @param new_stream Will return the uninitialized memory object which shall
* later become the clone of old_stream.
* @param new_input The clone of the input stream of old stream.
* @param flag Submit 0 for now.
* @return ISO_SUCCESS or an error code <0
*/
int iso_stream_clone_filter_common(IsoStream *old_stream,
IsoStream **new_stream,
IsoStream **new_input, int flag);
#endif /*STREAM_H_*/

98
libisofs/tree.c
View File

@ -1,5 +1,6 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2011 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -993,3 +994,100 @@ char *iso_tree_get_node_path(IsoNode *node)
return strdup(path);
}
}
/* ------------------------- tree cloning ------------------------------ */
static
int iso_tree_clone_dir(IsoDir *old_dir,
IsoDir *new_parent, char *new_name, IsoNode **new_node,
int flag)
{
IsoDir *new_dir = NULL;
IsoNode *sub_node = NULL, *new_sub_node = NULL;
IsoDirIter *iter = NULL;
int ret;
*new_node = NULL;
ret = iso_tree_add_new_dir(new_parent, new_name, &new_dir);
if (ret < 0)
return ret;
*new_node = (IsoNode *) new_dir;
ret = iso_dir_get_children(old_dir, &iter);
if (ret < 0)
goto ex;
while(1) {
ret = iso_dir_iter_next(iter, &sub_node);
if (ret == 0)
break;
ret = iso_tree_clone(sub_node, new_dir, sub_node->name, &new_sub_node,
0);
if (ret < 0)
goto ex;
}
ret = ISO_SUCCESS;
ex:;
if (iter != NULL)
iso_dir_iter_free(iter);
if (ret < 0 && new_dir != NULL) {
iso_node_remove_tree((IsoNode *) new_dir, NULL);
*new_node = NULL;
}
return ret;
}
static
int iso_tree_clone_file(IsoFile *old_file,
IsoDir *new_parent, char *new_name, IsoNode **new_node,
int flag)
{
IsoStream *new_stream = NULL;
IsoFile *new_file = NULL;
int ret;
*new_node = NULL;
ret = iso_stream_clone(old_file->stream, &new_stream, 0);
if (ret < 0)
return ret;
ret = iso_tree_add_new_file(new_parent, new_name, new_stream, &new_file);
if (ret < 0)
goto ex;
new_file->sort_weight = old_file->sort_weight;
*new_node = (IsoNode *) new_file;
ret = ISO_SUCCESS;
ex:;
if (new_stream != NULL)
iso_stream_unref(new_stream);
return ret;
}
/* API */
int iso_tree_clone(IsoNode *node,
IsoDir *new_parent, char *new_name, IsoNode **new_node,
int flag)
{
int ret = ISO_SUCCESS;
if (iso_dir_get_node(new_parent, new_name, NULL) == 1)
return ISO_NODE_NAME_NOT_UNIQUE;
/* >>> clone particular node types */;
if (node->type == LIBISO_DIR) {
ret = iso_tree_clone_dir((IsoDir *) node, new_parent, new_name,
new_node, 0);
} else if (node->type == LIBISO_FILE) {
ret = iso_tree_clone_file((IsoFile *) node, new_parent, new_name,
new_node, 0);
} else if (node->type == LIBISO_SYMLINK) {
/* >>> */;
} else if (node->type == LIBISO_SPECIAL) {
/* >>> */;
} else if (node->type == LIBISO_BOOT) {
ret = ISO_SUCCESS; /* API says they are silently ignored */
}
return ret;
}