NAME
zip_file_get_external_attributes —
get
external attributes for file in zip
LIBRARY
libzip (-lzip)
SYNOPSIS
#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);
DESCRIPTION
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:
ZIP_OPSYS_ACORN_RISC
ZIP_OPSYS_ALTERNATE_MVS
ZIP_OPSYS_AMIGA
ZIP_OPSYS_ATARI_ST
ZIP_OPSYS_BEOS
ZIP_OPSYS_CPM
ZIP_OPSYS_DOS
ZIP_OPSYS_MACINTOSH
ZIP_OPSYS_MVS
ZIP_OPSYS_OPENVMS
ZIP_OPSYS_OS_2
ZIP_OPSYS_OS_400
ZIP_OPSYS_OS_X
ZIP_OPSYS_TANDEM
ZIP_OPSYS_UNIX
ZIP_OPSYS_VFAT
ZIP_OPSYS_VM_CMS
ZIP_OPSYS_VSE
ZIP_OPSYS_WINDOWS_NTFS
(uncommon, use ZIP_OPSYS_DOS
instead)
ZIP_OPSYS_Z_SYSTEM
The defines above follow the PKWARE Inc. Appnote; please note that the InfoZIP
Appnote has a slightly different mapping.
RETURN VALUES
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.
EXAMPLES
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;
}
ERRORS
zip_file_get_external_attributes() fails if:
-
-
- [
ZIP_ER_INVAL
]
- index is not a valid file index in
archive.
SEE ALSO
libzip(3),
zip_file_set_external_attributes(3)
HISTORY
zip_file_get_external_attributes() was added in libzip 0.11.2.
AUTHORS
Dieter Baron
<
dillo@nih.at> and
Thomas Klausner
<
tk@giga.or.at>