NAME
archive_entry_acl_add_entry ,archive_entry_acl_add_entry_w ,archive_entry_acl_clear ,archive_entry_acl_count ,archive_entry_acl_next ,archive_entry_acl_next_w ,archive_entry_acl_reset ,archive_entry_acl_text_w ,archive_entry_atime ,archive_entry_atime_nsec ,archive_entry_clear ,archive_entry_clone ,archive_entry_copy_fflags_text_w ,archive_entry_copy_gname_w ,archive_entry_copy_hardlink ,archive_entry_copy_hardlink_w ,archive_entry_copy_pathname_w ,archive_entry_copy_stat ,archive_entry_copy_symlink_w ,archive_entry_copy_uname_w ,archive_entry_dev ,archive_entry_fflags ,archive_entry_fflags_text ,archive_entry_free ,archive_entry_gid ,archive_entry_gname ,archive_entry_hardlink ,archive_entry_ino ,archive_entry_mode ,archive_entry_mtime ,archive_entry_mtime_nsec ,archive_entry_new ,archive_entry_pathname ,archive_entry_pathname_w ,archive_entry_rdev ,archive_entry_rdevmajor ,archive_entry_rdevminor ,archive_entry_set_fflags ,archive_entry_set_gid ,archive_entry_set_gname ,archive_entry_set_hardlink ,archive_entry_set_link ,archive_entry_set_mode ,archive_entry_set_mtime ,archive_entry_set_pathname ,archive_entry_set_rdevmajor ,archive_entry_set_rdevminor ,archive_entry_set_size ,archive_entry_set_symlink ,archive_entry_set_uid ,archive_entry_set_uname ,archive_entry_size ,archive_entry_stat ,archive_entry_symlink ,archive_entry_uid ,archive_entry_uname - functions for manipulating archive entry descriptions
SYNOPSIS
archive_entry_acl_add_entry struct archive_entry * int type int permset int tag int qual const char *namearchive_entry_acl_add_entry_w struct archive_entry * int type int permset int tag int qual const wchar_t *namearchive_entry_acl_clear struct archive_entry *archive_entry_acl_count struct archive_entry * int typearchive_entry_acl_next struct archive_entry * int want_type int *type int *permset int *tag int *qual const char **namearchive_entry_acl_next_w struct archive_entry * int want_type int *type int *permset int *tag int *qual const wchar_t **namearchive_entry_acl_reset struct archive_entry *archive_entry_acl_text_w struct archive_entry * int flagsarchive_entry_atime struct archive_entry *archive_entry_atime_nsec struct archive_entry *archive_entry_clear struct archive_entry *archive_entry_clone struct archive_entry *archive_entry_copy_fflags_text_w struct archive_entry * const wchar_t *archive_entry_copy_gname_w struct archive_entry * const wchar_t *archive_entry_copy_hardlink struct archive_entry * const char *archive_entry_copy_hardlink_w struct archive_entry * const wchar_t *archive_entry_copy_pathname_w struct archive_entry * const wchar_t *archive_entry_copy_stat struct archive_entry * struct stat *archive_entry_copy_symlink_w struct archive_entry * const wchar_t *archive_entry_copy_uname_w struct archive_entry * const wchar_t *archive_entry_dev struct archive_entry *archive_entry_fflags struct archive_entry * unsigned long *set unsigned long *cleararchive_entry_fflags_text struct archive_entry *archive_entry_free struct archive_entry *archive_entry_gname struct archive_entry *archive_entry_hardlink struct archive_entry *archive_entry_ino struct archive_entry *archive_entry_mode struct archive_entry *archive_entry_mtime struct archive_entry *archive_entry_mtime_nsec struct archive_entry *archive_entry_new voidarchive_entry_pathname struct archive_entry *archive_entry_pathname_w struct archive_entry *archive_entry_rdev struct archive_entry *archive_entry_rdevmajor struct archive_entry *archive_entry_rdevminor struct archive_entry *archive_entry_set_fflags struct archive_entry * unsigned long set unsigned long cleararchive_entry_set_gid struct archive_entry * gid_tarchive_entry_set_gname struct archive_entry * const char *archive_entry_set_hardlink struct archive_entry * const char *archive_entry_set_link struct archive_entry * const char *archive_entry_set_mode struct archive_entry * mode_tarchive_entry_set_mtime struct archive_entry * time_t long nanosarchive_entry_set_pathname struct archive_entry * const char *archive_entry_set_rdevmajor struct archive_entry * dev_tarchive_entry_set_rdevminor struct archive_entry * dev_tarchive_entry_set_size struct archive_entry * int64_tarchive_entry_set_symlink struct archive_entry * const char *archive_entry_set_uid struct archive_entry * uid_tarchive_entry_set_uname struct archive_entry * const char *archive_entry_size struct archive_entry *archive_entry_stat struct archive_entry *archive_entry_symlink struct archive_entry *archive_entry_uname struct archive_entry *
DESCRIPTION
These functions create and manipulate data objects that
represent entries within an archive.
You can think of a
STRUCT ARCHIVE_ENTRY
as a heavy-duty version of
STRUCT STAT :
it includes everything from
STRUCT STAT
plus associated pathname, textual group and user names, etc.
These objects are used by
libarchive()
to represent the metadata associated with a particular
entry in an archive.
Create and Destroy
There are functions to allocate, destroy, clear, and copy
archive_entry
objects:
- archive_entry_clear
-
Erases the object, resetting all internal fields to the
same state as a newly-created object.
This is provided to allow you to quickly recycle objects
without thrashing the heap.
- archive_entry_clone
-
A deep copy operation; all text fields are duplicated.
- archive_entry_free
-
Releases the
STRUCT ARCHIVE_ENTRY
object.
- archive_entry_new
-
Allocate and return a blank
STRUCT ARCHIVE_ENTRY
object.
Set and Get Functions
Most of the functions here set or read entries in an object.
Such functions have one of the following forms:
- archive_entry_set_XXXX
-
Stores the provided data in the object.
In particular, for strings, the pointer is stored,
not the referenced string.
- archive_entry_copy_XXXX
-
As above, except that the referenced data is copied
into the object.
- archive_entry_XXXX
-
Returns the specified data.
In the case of strings, a const-qualified pointer to
the string is returned.
String data can be set or accessed as wide character strings
or normal
char
strings.
The functions that use wide character strings are suffixed with
_w .
Note that these are different representations of the same data:
For example, if you store a narrow string and read the corresponding
wide string, the object will transparently convert formats
using the current locale.
Similarly, if you store a wide string and then store a
narrow string for the same data, the previously-set wide string will
be discarded in favor of the new data.
There are a few set/get functions that merit additional description:
- archive_entry_set_link
-
This function sets the symlink field if it is already set.
Otherwise, it sets the hardlink field.
File Flags
File flags are transparently converted between a bitmap
representation and a textual format.
For example, if you set the bitmap and ask for text, the library
will build a canonical text format.
However, if you set a text format and request a text format,
you will get back the same text, even if it is ill-formed.
If you need to canonicalize a textual flags string, you should first set the
text form, then request the bitmap form, then use that to set the bitmap form.
Setting the bitmap format will clear the internal text representation
and force it to be reconstructed when you next request the text form.
The bitmap format consists of two integers, one containing bits
that should be set, the other specifying bits that should be
cleared.
Bits not mentioned in either bitmap will be ignored.
Usually, the bitmap of bits to be cleared will be set to zero.
In unusual circumstances, you can force a fully-specified set
of file flags by setting the bitmap of flags to clear to the complement
of the bitmap of flags to set.
(This differs from
fflagstostr(3)
,
which only includes names for set bits.)
Converting a bitmap to a textual string is a platform-specific
operation; bits that are not meaningful on the current platform
will be ignored.
The canonical text format is a comma-separated list of flag names.
The
archive_entry_copy_fflags_text_w
function parses the provided text and sets the internal bitmap values.
This is a platform-specific operation; names that are not meaningful
on the current platform will be ignored.
The function returns a pointer to the start of the first name that was not
recognized, or NULL if every name was recognized.
Note that every name--including names that follow an unrecognized name--will
be evaluated, and the bitmaps will be set to reflect every name that is
recognized.
(In particular, this differs from
strtofflags(3)
,
which stops parsing at the first unrecognized name.)
ACL Handling
XXX This needs serious help.
XXX
An
(ACL) is a list of permissions that grant access to particular users or
groups beyond what would normally be provided by standard POSIX mode bits.
The ACL handling here addresses some deficiencies in the POSIX.1e draft 17 ACL
specification.
In particular, POSIX.1e draft 17 specifies several different formats, but
none of those formats include both textual user/group names and numeric
UIDs/GIDs.
XXX explain ACL stuff XXX
SEE ALSO
archive()
HISTORY
The
libarchive
library first appeared in
AUTHORS
-nosplit
The
libarchive
library was written by
Tim Kientzle Aq kientzle@acm.org .