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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_t *list;
sqfs_u32 index;
if (xattr == NULL)
return 0;
sqfs_inode_get_xattr_index(inode, &index);
if (sqfs_xattr_reader_read_all(xattr, index, &list)) {
fprintf(stderr, "Error loading xattr entries list #%08X\n",
index);
return -1;
}
for (const sqfs_xattr_t *ent = list; ent != NULL; ent = ent->next) {
size_t key_len = strlen(ent->key);
if (is_printable((const sqfs_u8 *)ent->key, key_len)) {
printf("%s=", ent->key);
} else {
print_hex((const sqfs_u8 *)ent->key, key_len);
}
if (is_printable(ent->value, ent->value_len)) {
printf("%s\n", ent->value);
} else {
print_hex(ent->value, ent->value_len);
printf("\n");
}
}
sqfs_xattr_list_free(list);
return 0;
}
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