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ZIP_FILE_GET_EXTERNAL_ATTRIBUTES

Section: C Library Functions (3)
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BSD mandoc

NAME

zip_file_get_external_attributes - get external attributes for file in zip

LIBRARY

libzip -lzip)

SYNOPSIS

In zip.h Ft int Fn 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 Fn 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 syste-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

Fn zip_file_get_external_attributes fails if:

Bq Er ZIP_ER_INVAL: index is not a valid file index in archive

HISTORY

Fn zip_file_get_external_attributes was added in libzip 0.11.2.

AUTHORS

An -nosplit An Dieter Baron Aq Mt dillo@nih.at and An Thomas Klausner Aq Mt wiz@gatalith.at