zip_file_get_external_attributes
—
get external attributes for file in zip
libzip (-lzip)
#include
<zip.h>
int
zip_file_get_external_attributes
(
zip_t
*archive,
zip_uint64_t
index,
zip_flags_t
flags,
zip_uint8_t
*opsys,
zip_uint32_t
*attributes);
The
zip_file_get_external_attributes
()
function returns the operating system and external attributes for the file at
position
index in the zip archive. The
external attributes usually contain the operating system-specific file
permissions. If
flags is set to
ZIP_FL_UNCHANGED
, the original unchanged
values are returned. If
opsys or
attributes are
NULL
, they are not filled in.
The following operating systems are defined by the zip specification:
The defines above follow the PKWARE Inc. Appnote; please note that the InfoZIP
Appnote has a slightly different mapping.
Upon successful completion, 0 is returned. In case of an error,
-1
is returned and the error code in
archive is set to indicate the error.
The following code can be used to expand
attributes if the operating system is
ZIP_OPSYS_DOS
.
#include <sys/stat.h>
#define FA_RDONLY 0x01 // FILE_ATTRIBUTE_READONLY
#define FA_DIREC 0x10 // FILE_ATTRIBUTE_DIRECTORY
static mode_t
_zip_dos_attr2mode(zip_uint32_t attr)
{
mode_t m = S_IRUSR | S_IRGRP | S_IROTH;
if (0 == (attr & FA_RDONLY))
m |= S_IWUSR | S_IWGRP | S_IWOTH;
if (attr & FA_DIREC)
m = (S_IFDIR | (m & ~S_IFMT)) | S_IXUSR | S_IXGRP | S_IXOTH;
return m;
}
zip_file_get_external_attributes
() fails if:
-
-
- [
ZIP_ER_INVAL
]
- index is not a valid file index in
archive.
libzip(3),
zip_file_set_external_attributes(3)
zip_file_get_external_attributes
() was added
in libzip 0.11.2.
Dieter Baron
<
dillo@nih.at>
and
Thomas Klausner
<
tk@giga.or.at>