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New API calls iso_read_opts_load_system_area() and iso_image_get_system_area()

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This commit is contained in:
Thomas Schmitt 2010-04-16 21:49:44 +02:00
parent 9dc894584d
commit 38a7b4a5b1
5 changed files with 111 additions and 11 deletions
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20
libisofs/ecma119.c
View File

@ -1103,7 +1103,9 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
{
int ret, i, voldesc_size, nwriters, image_checksums_mad = 0, tag_pos;
Ecma119Image *target;
int el_torito_writer_index = -1, file_src_writer_index= -1;
int el_torito_writer_index = -1, file_src_writer_index = -1;
int system_area_options = 0;
char *system_area = NULL;
/* 1. Allocate target and copy opts there */
target = calloc(1, sizeof(Ecma119Image));
@ -1165,16 +1167,23 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
target->eltorito = (src->bootcat == NULL ? 0 : 1);
target->catalog = src->bootcat;
if (opts->system_area_data != NULL) {
system_area = opts->system_area_data;
system_area_options = opts->system_area_options;
} else if (src->system_area_data != NULL) {
system_area = src->system_area_data;
system_area_options = src->system_area_options;
}
target->system_area_data = NULL;
if(opts->system_area_data != NULL) {
if (system_area != NULL) {
target->system_area_data = calloc(32768, 1);
if (target->system_area_data == NULL) {
ret = ISO_OUT_OF_MEM;
goto target_cleanup;
}
memcpy(target->system_area_data, opts->system_area_data, 32768);
memcpy(target->system_area_data, system_area, 32768);
}
target->system_area_options = opts->system_area_options;
target->system_area_options = system_area_options;
target->vol_creation_time = opts->vol_creation_time;
target->vol_modification_time = opts->vol_modification_time;
@ -2163,7 +2172,7 @@ int iso_write_opts_set_system_area(IsoWriteOpts *opts, char data[32768],
if (opts->system_area_data != NULL)
free(opts->system_area_data);
opts->system_area_data = NULL;
} else {
} else if (!(flag & 2)) {
if (opts->system_area_data == NULL) {
opts->system_area_data = calloc(32768, 1);
if (opts->system_area_data == NULL)
@ -2171,6 +2180,7 @@ int iso_write_opts_set_system_area(IsoWriteOpts *opts, char data[32768],
}
memcpy(opts->system_area_data, data, 32768);
}
if (!(flag & 4))
opts->system_area_options = options & 3;
return ISO_SUCCESS;
}

43
libisofs/fs_image.c
View File

@ -102,6 +102,12 @@ struct iso_read_opts
*/
int auto_input_charset;
/**
* Enable or disable loading of the first 32768 bytes of the session and
* submission by iso_write_opts_set_system_area(data, 0).
*/
int load_system_area;
};
/**
@ -2951,7 +2957,7 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
struct iso_read_opts *opts,
IsoReadImageFeatures **features)
{
int ret, hflag;
int ret, hflag, i;
IsoImageFilesystem *fs;
IsoFilesystem *fsback;
IsoNodeBuilder *blback;
@ -2959,9 +2965,9 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
IsoFileSource *newroot;
_ImageFsData *data;
struct el_torito_boot_catalog *oldbootcat;
uint8_t *rpt;
#ifdef Libisofs_with_checksumS
int i;
uint32_t old_checksum_start_lba;
uint32_t old_checksum_end_lba;
uint32_t old_checksum_idx_count;
@ -2969,7 +2975,6 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
char checksum_type[81];
uint32_t checksum_size;
size_t size;
uint8_t *rpt;
void *ctx = NULL;
char md5[16];
#endif
@ -2978,12 +2983,30 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
return ISO_NULL_POINTER;
}
ret = iso_image_filesystem_new(src, opts, image->id, &fs);
if (ret < 0) {
return ret;
}
data = fs->data;
if (opts->load_system_area) {
if (image->system_area_data != NULL)
free(image->system_area_data);
image->system_area_data = calloc(32768, 1);
if (image->system_area_data == NULL)
return ISO_OUT_OF_MEM;
image->system_area_options = 0;
/* Read 32768 bytes */
for (i = 0; i < 16; i++) {
rpt = (uint8_t *) (image->system_area_data + i * 2048);
ret = src->read_block(src, opts->block + i, rpt);
if (ret < 0)
return ret;
}
}
/* get root from filesystem */
ret = fs->get_root(fs, &newroot);
if (ret < 0) {
@ -3332,8 +3355,9 @@ int iso_read_opts_new(IsoReadOpts **opts, int profile)
ropts->file_mode = 0444;
ropts->dir_mode = 0555;
ropts->noaaip= 1;
ropts->nomd5= 1;
ropts->noaaip = 1;
ropts->nomd5 = 1;
ropts->load_system_area = 0;
*opts = ropts;
return ISO_SUCCESS;
@ -3469,6 +3493,15 @@ int iso_read_opts_auto_input_charset(IsoReadOpts *opts, int mode)
return ISO_SUCCESS;
}
int iso_read_opts_load_system_area(IsoReadOpts *opts, int mode)
{
if (opts == NULL) {
return ISO_NULL_POINTER;
}
opts->load_system_area = mode & 1;
return ISO_SUCCESS;
}
/**
* Destroy an IsoReadImageFeatures object obtained with iso_image_import.
*/

12
libisofs/image.c
View File

@ -74,6 +74,8 @@ int iso_image_new(const char *name, IsoImage **image)
img->volset_id = strdup(name);
img->volume_id = strdup(name);
}
img->system_area_data = NULL;
img->system_area_options = 0;
img->builder_ignore_acl = 1;
img->builder_ignore_ea = 1;
img->inode_counter = 0;
@ -331,6 +333,16 @@ int iso_image_get_msg_id(IsoImage *image)
return image->id;
}
int iso_image_get_system_area(IsoImage *img, char system_area_data[32768],
int *options, int flag)
{
*options = img->system_area_options;
if (img->system_area_data == NULL)
return 0;
memcpy(system_area_data, img->system_area_data, 32768);
return 1;
}
static
int dir_update_size(IsoImage *image, IsoDir *dir)
{

5
libisofs/image.h
View File

@ -53,6 +53,11 @@ struct Iso_Image
/* el-torito boot catalog */
struct el_torito_boot_catalog *bootcat;
/* Eventually loaded system area data, or NULL */
char *system_area_data;
/* Prescribed/detected options, see iso_write_opts_set_system_area() */
int system_area_options;
/* image identifier, for message origin identifier */
int id;

40
libisofs/libisofs.h
View File

@ -1709,6 +1709,10 @@ int iso_write_opts_set_fifo_size(IsoWriteOpts *opts, size_t fifo_size);
* only if not bit0 is set.
* @param flag
* bit0 = invalidate any attached system area data. Same as data == NULL
* (This re-activates eventually loaded image System Area data.
* To erase those, submit 32 kB of zeros without flag bit0.)
* bit1 = keep data unaltered
* bit2 = keep options unaltered
* @return
* ISO_SUCCESS or error
* @since 0.6.30
@ -1992,6 +1996,20 @@ int iso_read_opts_set_input_charset(IsoReadOpts *opts, const char *charset);
*/
int iso_read_opts_auto_input_charset(IsoReadOpts *opts, int mode);
/**
* Enable or disable loading of the first 32768 bytes of the session.
*
* @param mode
* Bitfield for control purposes:
* bit0= Load System Area data and attach them to the image so that they
* get written by the next session, if not overridden by
* iso_write_opts_set_system_area().
* Submit any other bits with value 0.
*
* @since 0.6.30
*
*/
int iso_read_opts_load_system_area(IsoReadOpts *opts, int mode);
/**
* Import a previous session or image, for growing or modify.
@ -2428,6 +2446,28 @@ void el_torito_patch_isolinux_image(ElToritoBootImage *bootimg);
*/
int el_torito_set_isolinux_options(ElToritoBootImage *bootimg, int options, int flag);
/**
* Obtain a copy of the eventually loaded first 32768 bytes of the imported
* session, the System Area.
* It will be written to the start of the next session unless it gets
* overwritten by iso_write_opts_set_system_area().
*
* @param img
* The image to be inquired.
* @param data
* A byte array of at least 32768 bytesi to take the loaded bytes.
* @param options
* The option bits which will be applied if not overridden by
* iso_write_opts_set_system_area(). See there.
* @param flag
* Bitfield for control purposes, unused yet, submit 0
* @return
* 1 on success, 0 if no System Area was loaded, < 0 error.
* @since 0.6.30
*/
int iso_image_get_system_area(IsoImage *img, char data[32768],
int *options, int flag);
/**
* Increments the reference counting of the given node.
*