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ZIP_FILE_GET_EXTERNAL_ATTRIBUTES(3) Library Functions Manual ZIP_FILE_GET_EXTERNAL_ATTRIBUTES(3)

NAME

zip_file_get_external_attributes - get external attributes for file in zip

LIBRARY

libzip (-lzip)

SYNOPSIS

#include <zip.h>
const char *
 
zip_file_get_external_attributes(struct zip *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.

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)

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 < dillo@nih.at> and Thomas Klausner < tk@giga.or.at>
September 19, 2013 NiH