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Merge branch '4404_zip_magic'

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* 4404_zip_magic:
  Fix detection of zip-compressed file.
  Ticket #4404: wrong decompressot for zip files.
This commit is contained in:
Andrew Borodin 2022-10-09 14:08:59 +03:00
commit e48cd98ac1
2 changed files with 7 additions and 6 deletions
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12
lib/util.c
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@ -829,27 +829,25 @@ get_compression_type (int fd, const char *name)
return COMPRESSION_NONE;
/* GZIP_MAGIC and OLD_GZIP_MAGIC */
if (magic[0] == 037 && (magic[1] == 0213 || magic[1] == 0236))
if (magic[0] == 0x1F && (magic[1] == 0x8B || magic[1] == 0x9E))
return COMPRESSION_GZIP;
/* PKZIP_MAGIC */
if (magic[0] == 0120 && magic[1] == 0113 && magic[2] == 003 && magic[3] == 004)
if (magic[0] == 'P' && magic[1] == 'K' && magic[2] == 0x03 && magic[3] == 0x04)
{
/* Read compression type */
mc_lseek (fd, 8, SEEK_SET);
if (mc_read (fd, (char *) magic, 2) != 2)
return COMPRESSION_NONE;
/* Gzip can handle only deflated (8) or stored (0) files */
if ((magic[0] != 8 && magic[0] != 0) || magic[1] != 0)
return COMPRESSION_NONE;
/* Compatible with gzip */
return COMPRESSION_GZIP;
return COMPRESSION_ZIP;
}
/* PACK_MAGIC and LZH_MAGIC and compress magic */
if (magic[0] == 037 && (magic[1] == 036 || magic[1] == 0240 || magic[1] == 0235))
if (magic[0] == 0x1F && (magic[1] == 0x1E || magic[1] == 0xA0 || magic[1] == 0x9D))
/* Compatible with gzip */
return COMPRESSION_GZIP;
@ -910,6 +908,8 @@ decompress_extension (int type)
{
switch (type)
{
case COMPRESSION_ZIP:
return "/uz" VFS_PATH_URL_DELIMITER;
case COMPRESSION_GZIP:
return "/ugz" VFS_PATH_URL_DELIMITER;
case COMPRESSION_BZIP:

1
lib/util.h
View File

@ -77,6 +77,7 @@ typedef enum
enum compression_type
{
COMPRESSION_NONE,
COMPRESSION_ZIP,
COMPRESSION_GZIP,
COMPRESSION_BZIP,
COMPRESSION_BZIP2,