LIBRARY

libzip (-lzip)

SYNOPSIS

#include <zip.h>

const char *

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; }

AUTHORS

Dieter Baron <[email protected]> and Thomas Klausner <[email protected]>