diff options
| -rw-r--r-- | unpack/dump_xattrs.c | 69 |
1 files changed, 68 insertions, 1 deletions
diff --git a/unpack/dump_xattrs.c b/unpack/dump_xattrs.c index b7611a9..93b0b01 100644 --- a/unpack/dump_xattrs.c +++ b/unpack/dump_xattrs.c @@ -6,6 +6,61 @@ */ #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; @@ -44,7 +99,19 @@ int dump_xattrs(sqfs_xattr_reader_t *xattr, const sqfs_inode_generic_t *inode) return -1; } - printf("%s=%s\n", key->key, value->value); + 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"); + } + free(key); free(value); } |