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Writing ES fields with RRIP and AAIP fields when ER of AAIP is written.

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Also provided API call iso_write_opts_set_aaip_susp_1_10() which prevents
writing AAIP ER and consequentially of ES fields.
This commit is contained in:
Thomas Schmitt 2009-01-26 15:12:57 +01:00
parent 7dfec561d9
commit 4ed2269570
5 changed files with 130 additions and 14 deletions
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6
doc/susp_aaip_0_2.txt
View File

@ -3,7 +3,7 @@
Arbitrary Attribute Interchange Protocol
Draft version 0.2
Dec 19 2008
Jan 25 2008
Interchange of Persistent File Attributes
@ -344,8 +344,8 @@ Pending considerations:
- shall "AA" be fixely defined as signature ?
- shall an "ER" be issued at all ?
>>> look into SUSP 1.12 for ES
- shall an "ER" be issued at all ? (SUSP 1.10 would allow to omit)
>>> mention ES because of SUSP 1.12
- shall the tag types ACL_USER and ACL_GROUP with non-numeric qualifier be
revoked ?

11
libisofs/ecma119.c
View File

@ -900,6 +900,7 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
target->relaxed_vol_atts = opts->relaxed_vol_atts;
target->joliet_longer_paths = opts->joliet_longer_paths;
target->rrip_version_1_10 = opts->rrip_version_1_10;
target->aaip_susp_1_10 = opts->aaip_susp_1_10;
target->dir_rec_mtime = opts->dir_rec_mtime;
target->sort_files = opts->sort_files;
@ -1515,6 +1516,16 @@ int iso_write_opts_set_rrip_version_1_10(IsoWriteOpts *opts, int oldvers)
return ISO_SUCCESS;
}
/* ts A90125 */
int iso_write_opts_set_aaip_susp_1_10(IsoWriteOpts *opts, int oldvers)
{
if (opts == NULL) {
return ISO_NULL_POINTER;
}
opts->aaip_susp_1_10 = oldvers ? 1 : 0;
return ISO_SUCCESS;
}
int iso_write_opts_set_dir_rec_mtime(IsoWriteOpts *opts, int allow)
{
if (opts == NULL) {

18
libisofs/ecma119.h
View File

@ -115,6 +115,20 @@ struct iso_write_opts {
*/
unsigned int rrip_version_1_10 :1;
/* ts A90125 */
/**
* Write AAIP as extension according to SUSP 1.10 rather than SUSP 1.12.
* I.e. without announcing it by an ER field and thus without the need
* to preceed the RRIP fields by an ES and to preceed the AA field by ES.
* This saves bytes and might avoid problems with readers which dislike
* ER fields other than the ones for RRIP.
* On the other hand, SUSP 1.12 frowns on such unannounced extensions
* and prescribes ER and ES. It does this since year 1994.
*
* In effect only if above flag .aaip is set to 1.
*/
unsigned int aaip_susp_1_10 :1;
/**
* Store as ECMA-119 Directory Record timestamp the mtime of the source
* rather than the image creation time. (The ECMA-119 prescription seems
@ -271,6 +285,10 @@ struct ecma119_image
/** Write old fashioned RRIP-1.10 rather than RRIP-1.12 */
unsigned int rrip_version_1_10 :1;
/* ts A90125 */
/* Write AAIP as extension according to SUSP 1.10 rather than SUSP 1.12. */
unsigned int aaip_susp_1_10 :1;
/* Store in ECMA-119 timestamp mtime of source */
unsigned int dir_rec_mtime :1;

16
libisofs/libisofs.h
View File

@ -1239,6 +1239,22 @@ int iso_write_opts_set_joliet_longer_paths(IsoWriteOpts *opts, int allow);
*/
int iso_write_opts_set_rrip_version_1_10(IsoWriteOpts *opts, int oldvers);
/* ts A90125 */
/**
* Write AAIP as extension according to SUSP 1.10 rather than SUSP 1.12.
* I.e. without announcing it by an ER field and thus without the need
* to preceed the RRIP fields and the AA field by ES fields.
* This saves 5 to 10 bytes per file and might avoid problems with readers
* which dislike ER fields other than the ones for RRIP.
* On the other hand, SUSP 1.12 frowns on such unannounced extensions
* and prescribes ER and ES. It does this since the year 1994.
*
* In effect only if above iso_write_opts_set_aaip() enables writing of AAIP.
*
* @since 0.6.14
*/
int iso_write_opts_set_aaip_susp_1_10(IsoWriteOpts *opts, int oldvers);
/**
* Store as ECMA-119 Directory Record timestamp the mtime of the source
* rather than the image creation time.

93
libisofs/rockridge.c
View File

@ -26,6 +26,15 @@
#include <string.h>
#ifdef Libisofs_with_aaiP
/* ts A90125 */
static
int susp_add_ES(Ecma119Image *t, struct susp_info *susp, int to_ce, int seqno);
#endif /* Libisofs_with_aaiP */
static
int susp_append(Ecma119Image *t, struct susp_info *susp, uint8_t *data)
{
@ -476,23 +485,33 @@ int rrip_add_SL(Ecma119Image *t, struct susp_info *susp, uint8_t **comp,
/* ts A90112 */
/*
@param flag bit0= only account sizes in sua_free resp. ce_len
parameters t, susp, data may be NULL in this case
parameters susp and data may be NULL in this case
*/
static
int aaip_add_AA(Ecma119Image *t, struct susp_info *susp,
uint8_t **data, size_t num_data,
size_t *sua_free, size_t *ce_len, int flag)
{
int ret, done = 0, len;
int ret, done = 0, len, es_extra = 0;
uint8_t *aapt, *cpt;
if (*sua_free < num_data || *ce_len > 0) {
*ce_len += num_data;
if (!t->aaip_susp_1_10)
es_extra = 5;
if (*sua_free < num_data + es_extra || *ce_len > 0) {
*ce_len += num_data + es_extra;
} else {
*sua_free -= num_data;
*sua_free -= num_data + es_extra;
}
if (flag & 1)
return ISO_SUCCESS;
/* If AAIP enabled and announced by ER : Write ES field to announce AAIP */
if (t->aaip && !t->aaip_susp_1_10) {
ret = susp_add_ES(t, susp, (*ce_len > 0), 1);
if (ret < 0)
return ret;
}
aapt = *data;
if (!(aapt[4] & 1)) {
/* Single field can be handed over directly */
@ -691,6 +710,35 @@ int susp_add_SP(Ecma119Image *t, struct susp_info *susp)
}
/* ts A90125 */
/**
* SUSP 1.12: [...] shall specify as an 8-bit number the Extension
* Sequence Number of the extension specification utilized in the entries
* immediately following this System Use Entry. The Extension Sequence
* Numbers of multiple extension specifications on a volume shall correspond to
* the order in which their "ER" System Use Entries are recorded [...]
*/
static
int susp_add_ES(Ecma119Image *t, struct susp_info *susp, int to_ce, int seqno)
{
unsigned char *ES = malloc(5);
if (ES == NULL) {
return ISO_OUT_OF_MEM;
}
ES[0] = 'E';
ES[1] = 'S';
ES[2] = (unsigned char) 5;
ES[3] = (unsigned char) 1;
ES[4] = (unsigned char) seqno;
if (to_ce) {
return susp_append_ce(t, susp, ES);
} else {
return susp_append(t, susp, ES);
}
}
#ifdef Libisofs_with_aaiP
/* ts A90114 */
@ -892,7 +940,7 @@ int susp_calc_nm_sl_aa(Ecma119Image *t, Ecma119Node *n, size_t space,
/* let the expert decide where to add num_aapt */
if (num_aapt > 0) {
sua_free = space - *su_size;
aaip_add_AA(NULL, NULL, NULL, num_aapt, &sua_free, ce, 1);
aaip_add_AA(t, NULL, NULL, num_aapt, &sua_free, ce, 1);
*su_size = space - sua_free;
if (*ce > 0 && !(flag & 1))
goto unannounced_ca;
@ -949,11 +997,22 @@ size_t rrip_calc_len(Ecma119Image *t, Ecma119Node *n, int type, size_t space,
space--;
*ce = 0;
su_size = 0;
#ifdef Libisofs_with_aaiP
/* ts A90125 */
/* If AAIP enabled and announced by ER : account for 5 bytes of ES */;
if (t->aaip && !t->aaip_susp_1_10)
su_size += 5;
#endif /* Libisofs_with_aaiP */
/* PX and TF, we are sure they always fit in SUA */
if (!t->rrip_version_1_10) {
su_size = 44 + 26;
su_size += 44 + 26;
} else {
su_size = 36 + 26;
su_size += 36 + 26;
}
if (n->type == ECMA119_DIR) {
@ -1137,7 +1196,7 @@ size_t rrip_calc_len(Ecma119Image *t, Ecma119Node *n, int type, size_t space,
/* let the expert decide where to add num_aapt */
if (num_aapt > 0) {
sua_free = space - su_size;
aaip_add_AA(NULL, NULL, NULL, num_aapt, &sua_free, ce, 1);
aaip_add_AA(t, NULL, NULL, num_aapt, &sua_free, ce, 1);
su_size = space - sua_free;
}
@ -1276,6 +1335,18 @@ int rrip_get_susp_fields(Ecma119Image *t, Ecma119Node *n, int type,
}
}
#ifdef Libisofs_with_aaiP
/* ts A90125 */
/* If AAIP enabled and announced by ER : Announce RRIP by ES */
if (t->aaip && !t->aaip_susp_1_10) {
ret = susp_add_ES(t, info, 0, 0);
if (ret < 0)
goto add_susp_cleanup;
}
#endif /* Libisofs_with_aaiP */
/* PX and TF, we are sure they always fit in SUA */
ret = rrip_add_PX(t, node, info);
if (ret < 0) {
@ -1699,7 +1770,7 @@ int rrip_get_susp_fields(Ecma119Image *t, Ecma119Node *n, int type,
#else /* Libisofs_with_aaip_dummY */
if (t->aaip) {
if (t->aaip && !t->aaip_susp_1_10) {
#endif /* ! Libisofs_with_aaip_dummY */
@ -1727,7 +1798,7 @@ int rrip_get_susp_fields(Ecma119Image *t, Ecma119Node *n, int type,
#else /* Libisofs_with_aaip_dummY */
if (t->aaip) {
if (t->aaip && !t->aaip_susp_1_10) {
#endif /* ! Libisofs_with_aaip_dummY */