New API calls iso_assess_written_features(), iso_read_image_feature_named(), iso_read_image_features_text()

libisofs/image.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
- * Copyright (c) 2009 - 2015 Thomas Schmitt
+ * Copyright (c) 2009 - 2022 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 
@@ -204,6 +204,10 @@ int iso_image_new(const char *name, IsoImage **image)
     img->collision_warnings = 0;
     img->imported_sa_info = NULL;
     img->blind_on_local_get_attrs = 0;
+    img->do_deeper_tree_inspection = 0;
+    img->tree_loaded = 0;
+    img->rr_loaded = 0;
+    img->tree_compliance = NULL;
 
     *image = img;
     return ISO_SUCCESS;
@@ -271,6 +275,8 @@ void iso_image_unref(IsoImage *image)
             free(image->system_area_data);
         iso_image_free_checksums(image, 0);
         iso_imported_sa_unref(&(image->imported_sa_info), 0);
+        if (image->tree_compliance != NULL)
+            iso_write_opts_free(image->tree_compliance);
         free(image);
     }
 }

libisofs/image.h

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
- * Copyright (c) 2009 - 2017 Thomas Schmitt
+ * Copyright (c) 2009 - 2022 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 
@@ -252,6 +252,13 @@ struct Iso_Image
      */
     int blind_on_local_get_attrs;
 
+    /* Deeper tree inspection when reading an IsoImage assesses traces of the
+       used write options.
+    */
+    int do_deeper_tree_inspection;
+    int tree_loaded; /* 0=ISO 9660/ECMA-119 1=Joliet 2=ISO 9660:1999 */
+    int rr_loaded;   /* 0=plain ISO 9660/ECMA-119 1=Rock Ridge */ 
+    IsoWriteOpts *tree_compliance;
 };
 
 
@@ -443,5 +450,9 @@ int iso_imported_sa_new(struct iso_imported_sys_area **sa_info, int flag);
 
 int iso_imported_sa_unref(struct iso_imported_sys_area **sa_info, int flag);
 
+void iso_image_assess_ecma119_name(IsoImage *image, struct stat *info,
+                                   char *path, char *name);
+void iso_image_assess_joliet_name(IsoImage *image, struct stat *info,
+                                  char *path, char *name);
 
 #endif /*LIBISO_IMAGE_H_*/

libisofs/libisofs.h

@@ -3245,7 +3245,40 @@ int iso_image_import(IsoImage *image, IsoDataSource *src, IsoReadOpts *opts,
                      IsoReadImageFeatures **features);
 
 /**
- * Destroy an IsoReadImageFeatures object obtained with iso_image_import.
+ * Assess features of the importable directory trees of src and an estimation
+ * of the write options which would cause the recognized features.
+ * This goes deeper than the feature assessment of iso_image_import(), e.g. by
+ * inspecting file names.
+ *
+ * For the parameters "src", "opts", and "features" see also the description of
+ * iso_image_import().
+ *
+ * @param src
+ *     Data Source from which old image will be read.
+ * @param opts
+ *     Options for image import. Settings about tree choice will be ignored.
+ * @param features
+ *     Returns the pointer to a newly allocated and filled IsoReadImageFeatures
+ *     object. NULL is not allowed, other than with iso_image_import().
+ *     If *features is returned as non-NULL, then it should be freed with
+ *     iso_read_image_features_destroy() when no more needed.
+ * @param write_opts
+ *     Returns the pointer to a newly allocated and filled IsoWriteOpts object.
+ *     If *write_opts is returned as non-NULL, then it should be freed with
+ *     iso_write_opts_free() when no more needed.
+ *
+ * @return
+ *     1 on success, < 0 on error
+ *
+ * @since 1.5.6
+ */
+int iso_assess_written_features(IsoDataSource *src, IsoReadOpts *opts,
+                                IsoReadImageFeatures **features,
+                                IsoWriteOpts **write_opts);
+
+/**
+ * Destroy an IsoReadImageFeatures object obtained with iso_image_import() or
+ * iso_assess_written_features().
  *
  * @since 0.6.2
  */
@@ -3303,6 +3336,99 @@ int iso_read_image_features_tree_loaded(IsoReadImageFeatures *f);
  */
 int iso_read_image_features_rr_loaded(IsoReadImageFeatures *f);
 
+/**
+ * Get a named feature as text, num_value, or pt_value depending on its type.
+ * The set of named features includes the features which can be inquired by
+ * own iso_read_image_features_*() functions:
+ *   size                     See iso_read_image_features_get_size()
+ *   rockridge                See iso_read_image_features_has_rockridge()
+ *                                iso_write_opts_set_rockridge()
+ *   joliet                   See iso_read_image_features_has_joliet()
+ *                                iso_write_opts_set_joliet()
+ *   iso1999                  See iso_read_image_features_has_iso1999()
+ *                                iso_write_opts_set_iso1999()
+ *   eltorito                 See iso_read_image_features_has_eltorito()
+ *   tree_loaded              See iso_read_image_features_tree_loaded()
+ *   rr_loaded                See iso_read_image_features_rr_loaded()
+ * Other named features are:
+ *   tree_loaded_text         Text form of "tree_loaded":
+ *                            0="ISO9660", 1="Joliet", 2="ISO9660:1999"
+ *   aaip                     1=AAIP information was seen, 0= no AAIP seen
+ * Detected traces of potential write option settings:
+ *   iso_level                See iso_write_opts_set_iso_level()
+ *   untranslated_name_len    See iso_write_opts_set_untranslated_name_len()
+ *   allow_dir_id_ext         See iso_write_opts_set_allow_dir_id_ext()
+ *   omit_version_numbers     See iso_write_opts_set_omit_version_numbers()
+ *   allow_deep_paths         See iso_write_opts_set_allow_deep_paths()
+ *   allow_longer_paths       See iso_write_opts_set_allow_longer_paths()
+ *   max_37_char_filenames    See iso_write_opts_set_max_37_char_filenames()
+ *   no_force_dots            See iso_write_opts_set_no_force_dots()
+ *   allow_lowercase          See iso_write_opts_set_allow_lowercase()
+ *   allow_full_ascii         See iso_write_opts_set_allow_full_ascii()
+ *   relaxed_vol_atts         See iso_write_opts_set_relaxed_vol_atts()
+ *   joliet_longer_paths      See iso_write_opts_set_joliet_longer_paths()
+ *   joliet_long_names        See iso_write_opts_set_joliet_long_names()
+ *   joliet_utf16             See iso_write_opts_set_joliet_utf16()
+ *   rrip_version_1_10        See iso_write_opts_set_rrip_version_1_10()
+ *   rrip_1_10_px_ino         See iso_write_opts_set_rrip_1_10_px_ino()
+ *   aaip_susp_1_10           See iso_write_opts_set_aaip_susp_1_10()
+ *   record_md5_session       See iso_write_opts_set_record_md5() param session
+ *   record_md5_files         See iso_write_opts_set_record_md5() param files
+ *
+ * @param f
+ *      A features object returned by iso_image_import() or
+ *      iso_assess_written_features().
+ * @param name
+ *      The name of the feature to be inquired.
+ * @param text
+ *      If text is not NULL, *text returns a textual representation of the
+ *      reply. Dispose *text by free(2) when no longer needed.
+ * @param type
+ *      Returns which of num_value or pt_value is valid:
+ *      0= *num_value is valid
+ *      1= *pt_value is valid
+ * @param num_value
+ *      Returns the numerical value of the feature if type == 0.
+ * @param pt_value
+ *      Returns a pointer to a memory area inside the features object if type
+ *      is 1. The area is not necessarily 0-terminated.
+ *      Do _not_ dispose *pt_value and do not use it after f was disposed.
+ * @param pt_size
+ *      Returns the size of the pt_value memory area if type is 1.
+ *      This counting includes a terminating 0-byte if it is present.
+ * @return
+ *      0 = Feature was not yet examined. Reply is not valid.
+ *      1 = Reply is valid
+ *      ISO_UNDEF_READ_FEATURE = Given name is not known
+ *      <0 = other error
+ *
+ * @since 1.5.6
+ */
+int iso_read_image_feature_named(IsoReadImageFeatures *f, char *name,
+                                 char **text, int *type,
+                                 int64_t *num_value, void **pt_value,
+                                 size_t *pt_size);
+
+/**
+ * Get all validly assessed named features as one single 0-terminated string
+ * consisting of single lines for each feature.
+ *
+ * @param f
+ *      A features object returned by iso_image_import() or
+ *      iso_assess_written_features().
+ * @param with_values
+ *      If set to 1: return lines of form  name=value\n
+ *      If set to 0: return lines of form  name\n
+ * @param feature_text
+ *      Returns the result string. Dispose by free(2) when no longer needed.
+ * @return
+ *      1 = result is valid, <0 indicates error
+ *
+ * @since 1.5.6
+ */
+int iso_read_image_features_text(IsoReadImageFeatures *f, int with_values,
+                                 char **feature_text);
+
 /**
  * Increments the reference counting of the given image.
  *
@@ -9272,6 +9398,10 @@ int iso_conv_name_chars(IsoWriteOpts *opts, char *name, size_t name_len,
 /** Cannot obtain size of zisofs compressed stream    (FAILURE, HIGH, -425) */
 #define ISO_ZISOFS_UNKNOWN_SIZE     0xE830FE57
 
+/** Undefined IsoReadImageFeatures name                 (SORRY, HIGH, -426) */
+#define ISO_UNDEF_READ_FEATURE      0xE030FE56
+
+
 
 /* Internal developer note: 
    Place new error codes directly above this comment. 

libisofs/libisofs.ver

@@ -21,6 +21,7 @@ el_torito_set_load_seg;
 el_torito_set_load_size;
 el_torito_set_no_bootable;
 el_torito_set_selection_crit;
+iso_assess_written_features;
 iso_conv_name_chars;
 iso_crc32_gpt;
 iso_data_source_new_from_file;
@@ -229,6 +230,7 @@ iso_node_xinfo_make_clonable;
 iso_node_zf_by_magic;
 iso_nowtime;
 iso_obtain_msgs;
+iso_read_image_feature_named;
 iso_read_image_features_destroy;
 iso_read_image_features_get_size;
 iso_read_image_features_has_eltorito;
@@ -236,6 +238,7 @@ iso_read_image_features_has_iso1999;
 iso_read_image_features_has_joliet;
 iso_read_image_features_has_rockridge;
 iso_read_image_features_rr_loaded;
+iso_read_image_features_text;
 iso_read_image_features_tree_loaded;
 iso_read_opts_auto_input_charset;
 iso_read_opts_free;

libisofs/messages.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
- * Copyright (c) 2009 - 2016 Thomas Schmitt
+ * Copyright (c) 2009 - 2022 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 
@@ -392,8 +392,10 @@ const char *iso_error_to_msg(int errcode)
     case ISO_AAIP_BAD_AASTRING:
         return "Error with decoding AAIP info for ACL or xattr";
     case ISO_AAIP_NO_GET_LOCAL:
+    case ISO_AAIP_NO_GET_LOCAL_S:
         return "Error with reading ACL or xattr from local file";
     case ISO_AAIP_NO_SET_LOCAL:
+    case ISO_AAIP_NO_SET_LOCAL_S:
         return "Error with attaching ACL or xattr to local file";
     case ISO_AAIP_NON_USER_NAME:
         return "Unallowed attempt to set an xattr with non-userspace name";
@@ -563,6 +565,8 @@ const char *iso_error_to_msg(int errcode)
         return "Prevented zisofs block pointer counter underrun";
     case ISO_ZISOFS_UNKNOWN_SIZE:
         return "Cannot obtain size of zisofs compressed stream";
+    case ISO_UNDEF_READ_FEATURE:
+        return "Undefined IsoReadImageFeatures name";
     default:
         return "Unknown error";
     }

libisofs/tree.c

@@ -24,6 +24,7 @@
 #include "messages.h"
 #include "tree.h"
 #include "util.h"
+#include "ecma119.h"
 
 #include <stdlib.h>
 #include <string.h>
@@ -1052,6 +1053,17 @@ int iso_add_dir_src_rec(IsoImage *image, IsoDir *parent, IsoFileSource *dir)
             goto dir_rec_continue;
         }
             
+	if (image->do_deeper_tree_inspection) {
+            if (image->tree_loaded == 0 && image->rr_loaded == 0) {
+                iso_image_assess_ecma119_name(image, &info, path, name);
+            } else if (image->tree_loaded == 1) {
+                iso_image_assess_joliet_name(image, &info, path, name);
+            }
+            if (info.st_size > MAX_ISO_FILE_SECTION_SIZE &&
+                image->tree_compliance != NULL)
+                image->tree_compliance->iso_level = 3;
+        }
+
         if (check_excludes(image, path)) {
             iso_msg_debug(image->id, "Skipping excluded file %s", path);
             skip = 1;

libisofs/util.c

@@ -1,7 +1,7 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
  * Copyright (c) 2007 Mario Danic
- * Copyright (c) 2009 - 2019 Thomas Schmitt
+ * Copyright (c) 2009 - 2022 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 
@@ -803,18 +803,18 @@ int str2utf16be(const char *icharset, const char *input, uint16_t **output)
     return ISO_SUCCESS;
 }
 
-static int valid_d_char(char c)
+int valid_d_char(char c)
 {
     return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c == '_');
 }
 
-static int valid_a_char(char c)
+int valid_a_char(char c)
 {
     return (c >= ' ' && c <= '"') || (c >= '%' && c <= '?') || 
            (c >= 'A' && c <= 'Z') || (c == '_');
 }
 
-static int valid_j_char(uint16_t c)
+int valid_j_char(uint16_t c)
 {
     return cmp_ucsbe(&c, ' ') != -1 && cmp_ucsbe(&c, '*') && cmp_ucsbe(&c, '/')
         && cmp_ucsbe(&c, ':') && cmp_ucsbe(&c, ';') && cmp_ucsbe(&c, '?') 

libisofs/util.h

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
- * Copyright (c) 2009 - 2012 Thomas Schmitt
+ * Copyright (c) 2009 - 2022 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 
@@ -263,6 +263,12 @@ void iso_handle_split_utf16(uint16_t *utf_word);
 int str2d_char(const char *icharset, const char *input, char **output);
 int str2a_char(const char *icharset, const char *input, char **output);
 
+/* Check for membership in the d-, a-, or j-character set */
+int valid_d_char(char c);
+int valid_a_char(char c);
+int valid_j_char(uint16_t c);
+
+
 void iso_lsb(uint8_t *buf, uint32_t num, int bytes);
 void iso_lsb64(uint8_t *buf, uint64_t num);
 void iso_msb(uint8_t *buf, uint32_t num, int bytes);