ARCHIVE_ENTRY_STAT(3)

ARCHIVE_ENTRY_STAT(3) | Library Functions Manual | ARCHIVE_ENTRY_STAT(3)

# NAME

`archive_entry_stat`, `archive_entry_copy_stat`, `archive_entry_filetype`, `archive_entry_set_filetype`, `archive_entry_mode`, `archive_entry_set_mode`, `archive_entry_size`, `archive_entry_size_is_set`, `archive_entry_set_size`, `archive_entry_unset_size`, `archive_entry_dev`, `archive_entry_set_dev`, `archive_entry_dev_is_set`, `archive_entry_devmajor`, `archive_entry_set_devmajor`, `archive_entry_devminor`, `archive_entry_set_devminor`, `archive_entry_ino`, `archive_entry_set_ino`, `archive_entry_ino_is_set`, `archive_entry_ino64`, `archive_entry_set_ino64`, `archive_entry_nlink`, `archive_entry_rdev`, `archive_entry_set_rdev`, `archive_entry_rdevmajor`, `archive_entry_set_rdevmajor`, `archive_entry_rdevminor`, `archive_entry_set_rdevminor`, —
accessor functions for manipulating archive entry descriptions

# LIBRARY

Streaming Archive Library (libarchive, -larchive)

# SYNOPSIS

`#include <archive_entry.h>`

const struct stat *
`archive_entry_stat`(struct archive_entry *a);

void
`archive_entry_copy_stat`(struct archive_entry *a, const struct stat *sb);

mode_t
`archive_entry_filetype`(struct archive_entry *a);

void
`archive_entry_set_filetype`(struct archive_entry *a, unsigned int type);

mode_t
`archive_entry_mode`(struct archive_entry *a);

void
`archive_entry_set_mode`(struct archive_entry *a, mode_t mode);

int64_t
`archive_entry_size`(struct archive_entry *a);

int
`archive_entry_size_is_set`(struct archive_entry *a);

void
`archive_entry_set_size`(struct archive_entry *a, int64_t size);

void
`archive_entry_unset_size`(struct archive_entry *a);

dev_t
`archive_entry_dev`(struct archive_entry *a);

void
`archive_entry_set_dev`(struct archive_entry *a, dev_t dev);

int
`archive_entry_dev_is_set`(struct archive_entry *a);

dev_t
`archive_entry_devmajor`(struct archive_entry *a);

void
`archive_entry_set_devmajor`(struct archive_entry *a, dev_t major);

dev_t
`archive_entry_devminor`(struct archive_entry *a);

void
`archive_entry_set_devminor`(struct archive_entry *a, dev_t minor);

ino_t
`archive_entry_ino`(struct archive_entry *a);

void
`archive_entry_set_ino`(struct archive_entry *a, unsigned long ino);

int
`archive_entry_ino_is_set`(struct archive_entry *a);

int64_t
`archive_entry_ino64`(struct archive_entry *a);

void
`archive_entry_set_ino64`(struct archive_entry *a, int64_t ino);

unsigned int
`archive_entry_nlink`(struct archive_entry *a);

void
`archive_entry_set_nlink`(struct archive_entry *a, unsigned int count);

dev_t
`archive_entry_rdev`(struct archive_entry *a);

dev_t
`archive_entry_rdevmajor`(struct archive_entry *a);

dev_t
`archive_entry_rdevminor`(struct archive_entry *a);

void
`archive_entry_set_rdev`(struct archive_entry *a, dev_t dev);

void
`archive_entry_set_rdevmajor`(struct archive_entry *a, dev_t major);

void
`archive_entry_set_rdevminor`(struct archive_entry *a, dev_t minor);

# DESCRIPTION

## Copying to and from struct stat

The function `archive_entry_stat`() converts the various fields stored in the archive entry to the format used by stat(2). The return value remains valid until either `archive_entry_clear`() or `archive_entry_free`() is called. It is not affected by calls to the set accessor functions. It currently sets the following values in struct stat: st_atime, st_ctime, st_dev, st_gid, st_ino, st_mode, st_mtime, st_nlink, st_rdev, st_size, st_uid. In addition, st_birthtime and high-precision information for time-related fields will be included on platforms that support it.

The function `archive_entry_copy_stat`() copies fields from the platform's struct stat. Fields not provided by struct stat are unchanged.

## General accessor functions

The functions `archive_entry_filetype`() and `archive_entry_set_filetype`() get respectively set the filetype. The file type is one of the following constants:

AE_IFREG
  Regular file
AE_IFLNK
  Symbolic link
AE_IFSOCK
  Socket
AE_IFCHR
  Character device
AE_IFBLK
  Block device
AE_IFDIR
  Directory
AE_IFIFO
  Named pipe (fifo)

Not all file types are supported by all platforms. The constants used by stat(2) may have different numeric values from the corresponding constants above.

The functions `archive_entry_mode`() and `archive_entry_set_mode`() get/set a combination of file type and permissions and provide the equivalent of st_mode. Use of `archive_entry_filetype`() and `archive_entry_perm`() for getting and `archive_entry_set_filetype`() and `archive_entry_set_perm`() for setting is recommended.

The function `archive_entry_size`() returns the file size, if it has been set, and 0 otherwise. `archive_entry_size`() can be used to query that status. `archive_entry_set_size`() and `archive_entry_unset_size`() set and unset the size, respectively.

The number of references (hardlinks) can be obtained by calling `archive_entry_nlinks`() and set with `archive_entry_set_nlinks`().

## Identifying unique files

The functions `archive_entry_dev`() and `archive_entry_ino64`() are used by archive_entry_linkify(3) to find hardlinks. The pair of device and inode is supposed to identify hardlinked files.

The device major and minor number can be obtained independently using `archive_entry_devmajor`() and `archive_entry_devminor`(). The device can be set either via `archive_entry_set_dev`() or by the combination of major and minor number using `archive_entry_set_devmajor`() and `archive_entry_set_devminor`().

The inode number can be obtained using `archive_entry_ino`(). This is a legacy interface that uses the platform ino_t, which may be very small. To set the inode number, `archive_entry_set_ino64`() is the preferred interface.

## Accessor functions for block and character devices

Block and character devices are characterised either using a device number or a pair of major and minor number. The combined device number can be obtained with `archive_device_rdev`() and set with `archive_device_set_rdev`(). The major and minor numbers are accessed by `archive_device_rdevmajor`(), `archive_device_rdevminor`() `archive_device_set_rdevmajor`() and `archive_device_set_rdevminor`().

The process of splitting the combined device number into major and minor number and the reverse process of combing them differs between platforms. Some archive formats use the combined form, while other formats use the split form.

# SEE ALSO

archive_entry_acl(3), archive_entry_perms(3), archive_entry_time(3), libarchive(3), stat(2)

February 2, 2012 | NetBSD 9.0