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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* dump_xattrs.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "rdsquashfs.h"
static void print_hex(const sqfs_u8 *value, size_t len)
{
printf("0x");
while (len--)
printf("%02X", *(value++));
}
static bool is_printable(const sqfs_u8 *value, size_t len)
{
size_t utf8_cont = 0;
sqfs_u8 x;
while (len--) {
x = *(value++);
if (utf8_cont > 0) {
if ((x & 0xC0) != 0x80)
return false;
--utf8_cont;
} else {
if (x < 0x80) {
if (x < 0x20) {
if (x >= 0x07 && x <= 0x0D)
continue;
if (x == 0x00)
continue;
return false;
}
if (x == 0x7F)
return false;
}
if ((x & 0xE0) == 0xC0) {
utf8_cont = 1;
} else if ((x & 0xF0) == 0xE0) {
utf8_cont = 2;
} else if ((x & 0xF8) == 0xF0) {
utf8_cont = 3;
} else if ((x & 0xFC) == 0xF8) {
utf8_cont = 4;
} else if ((x & 0xFE) == 0xFC) {
utf8_cont = 5;
}
if (utf8_cont > 0 && len < utf8_cont)
return false;
}
}
return true;
}
int dump_xattrs(sqfs_xattr_reader_t *xattr, const sqfs_inode_generic_t *inode)
{
sqfs_xattr_value_t *value;
sqfs_xattr_entry_t *key;
sqfs_xattr_id_t desc;
sqfs_u32 index;
size_t i;
if (xattr == NULL)
return 0;
sqfs_inode_get_xattr_index(inode, &index);
if (index == 0xFFFFFFFF)
return 0;
if (sqfs_xattr_reader_get_desc(xattr, index, &desc)) {
fputs("Error resolving xattr index\n", stderr);
return -1;
}
if (sqfs_xattr_reader_seek_kv(xattr, &desc)) {
fputs("Error locating xattr key-value pairs\n", stderr);
return -1;
}
for (i = 0; i < desc.count; ++i) {
if (sqfs_xattr_reader_read_key(xattr, &key)) {
fputs("Error reading xattr key\n", stderr);
return -1;
}
if (sqfs_xattr_reader_read_value(xattr, key, &value)) {
fputs("Error reading xattr value\n", stderr);
sqfs_free(key);
return -1;
}
if (is_printable(key->key, key->size)) {
printf("%s=", key->key);
} else {
print_hex(key->key, key->size);
}
if (is_printable(value->value, value->size)) {
printf("%s\n", value->value);
} else {
print_hex(value->value, value->size);
printf("\n");
}
sqfs_free(key);
sqfs_free(value);
}
return 0;
}
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