path: root/archivers/libarchive/files/doc/man/archive_entry_stat.3

.TH ARCHIVE_ENTRY_STAT 3 "February 2, 2012" ""
.SH NAME
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\fB\%archive_entry_stat\fP,
\fB\%archive_entry_copy_stat\fP,
\fB\%archive_entry_filetype\fP,
\fB\%archive_entry_set_filetype\fP,
\fB\%archive_entry_mode\fP,
\fB\%archive_entry_set_mode\fP,
\fB\%archive_entry_size\fP,
\fB\%archive_entry_size_is_set\fP,
\fB\%archive_entry_set_size\fP,
\fB\%archive_entry_unset_size\fP,
\fB\%archive_entry_dev\fP,
\fB\%archive_entry_set_dev\fP,
\fB\%archive_entry_dev_is_set\fP,
\fB\%archive_entry_devmajor\fP,
\fB\%archive_entry_set_devmajor\fP,
\fB\%archive_entry_devminor\fP,
\fB\%archive_entry_set_devminor\fP,
\fB\%archive_entry_ino\fP,
\fB\%archive_entry_set_ino\fP,
\fB\%archive_entry_ino_is_set\fP,
\fB\%archive_entry_ino64\fP,
\fB\%archive_entry_set_ino64\fP,
\fB\%archive_entry_nlink\fP,
\fB\%archive_entry_rdev\fP,
\fB\%archive_entry_set_rdev\fP,
\fB\%archive_entry_rdevmajor\fP,
\fB\%archive_entry_set_rdevmajor\fP,
\fB\%archive_entry_rdevminor\fP,
\fB\%archive_entry_set_rdevminor\fP,
\- accessor functions for manipulating archive entry descriptions
.SH LIBRARY
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Streaming Archive Library (libarchive, -larchive)
.SH SYNOPSIS
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\fB#include <archive_entry.h>\fP
.br
\fIconst struct stat *\fP
.br
\fB\%archive_entry_stat\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIvoid\fP
.br
\fB\%archive_entry_copy_stat\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%const\ struct\ stat\ *sb\fP);
.br
\fImode_t\fP
.br
\fB\%archive_entry_filetype\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIvoid\fP
.br
\fB\%archive_entry_set_filetype\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%unsigned\ int\ type\fP);
.br
\fImode_t\fP
.br
\fB\%archive_entry_mode\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIvoid\fP
.br
\fB\%archive_entry_set_mode\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%mode_t\ mode\fP);
.br
\fIint64_t\fP
.br
\fB\%archive_entry_size\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIint\fP
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\fB\%archive_entry_size_is_set\fP(\fI\%struct\ archive_entry\ *a\fP);
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\fIvoid\fP
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\fB\%archive_entry_set_size\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%int64_t\ size\fP);
.br
\fIvoid\fP
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\fB\%archive_entry_unset_size\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIdev_t\fP
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\fB\%archive_entry_dev\fP(\fI\%struct\ archive_entry\ *a\fP);
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\fIvoid\fP
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\fB\%archive_entry_set_dev\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%dev_t\ dev\fP);
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\fIint\fP
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\fB\%archive_entry_dev_is_set\fP(\fI\%struct\ archive_entry\ *a\fP);
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\fIdev_t\fP
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\fB\%archive_entry_devmajor\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIvoid\fP
.br
\fB\%archive_entry_set_devmajor\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%dev_t\ major\fP);
.br
\fIdev_t\fP
.br
\fB\%archive_entry_devminor\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIvoid\fP
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\fB\%archive_entry_set_devminor\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%dev_t\ minor\fP);
.br
\fIino_t\fP
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\fB\%archive_entry_ino\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIvoid\fP
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\fB\%archive_entry_set_ino\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%unsigned\ long\ ino\fP);
.br
\fIint\fP
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\fB\%archive_entry_ino_is_set\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIint64_t\fP
.br
\fB\%archive_entry_ino64\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIvoid\fP
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\fB\%archive_entry_set_ino64\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%int64_t\ ino\fP);
.br
\fIunsigned int\fP
.br
\fB\%archive_entry_nlink\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIvoid\fP
.br
\fB\%archive_entry_set_nlink\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%unsigned\ int\ count\fP);
.br
\fIdev_t\fP
.br
\fB\%archive_entry_rdev\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIdev_t\fP
.br
\fB\%archive_entry_rdevmajor\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIdev_t\fP
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\fB\%archive_entry_rdevminor\fP(\fI\%struct\ archive_entry\ *a\fP);
.br
\fIvoid\fP
.br
\fB\%archive_entry_set_rdev\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%dev_t\ dev\fP);
.br
\fIvoid\fP
.br
\fB\%archive_entry_set_rdevmajor\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%dev_t\ major\fP);
.br
\fIvoid\fP
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\fB\%archive_entry_set_rdevminor\fP(\fI\%struct\ archive_entry\ *a\fP, \fI\%dev_t\ minor\fP);
.SH DESCRIPTION
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.SS Copying to and from Vt struct stat
The function
\fB\%archive_entry_stat\fP()
converts the various fields stored in the archive entry to the format
used by
\fBstat\fP(2).
The return value remains valid until either
\fB\%archive_entry_clear\fP()
or
\fB\%archive_entry_free\fP()
is called.
It is not affected by calls to the set accessor functions.
It currently sets the following values in
Vt struct stat:
Vt st_atime,
Vt st_ctime,
Vt st_dev,
Vt st_gid,
Vt st_ino,
Vt st_mode,
Vt st_mtime,
Vt st_nlink,
Vt st_rdev,
Vt st_size,
Vt st_uid.
In addition,
Vt st_birthtime
and high-precision information for time-related fields
will be included on platforms that support it.
.PP
The function
\fB\%archive_entry_copy_stat\fP()
copies fields from the platform's
Vt struct stat.
Fields not provided by
Vt struct stat
are unchanged.
.SS General accessor functions
The functions
\fB\%archive_entry_filetype\fP()
and
\fB\%archive_entry_set_filetype\fP()
get respectively set the filetype.
The file type is one of the following constants:
.RS 5
.TP
AE_IFREG
Regular file
.TP
AE_IFLNK
Symbolic link
.TP
AE_IFSOCK
Socket
.TP
AE_IFCHR
Character device
.TP
AE_IFBLK
Block device
.TP
AE_IFDIR
Directory
.TP
AE_IFIFO
Named pipe (fifo)
.RE
Not all file types are supported by all platforms.
The constants used by
\fBstat\fP(2)
may have different numeric values from the
corresponding constants above.
.PP
The functions
\fB\%archive_entry_mode\fP()
and
\fB\%archive_entry_set_mode\fP()
get/set a combination of file type and permissions and provide the
equivalent of
\fIst_mode\fP.
Use of
\fB\%archive_entry_filetype\fP()
and
\fB\%archive_entry_perm\fP()
for getting and
\fB\%archive_entry_set_filetype\fP()
and
\fB\%archive_entry_set_perm\fP()
for setting is recommended.
.PP
The function
\fB\%archive_entry_size\fP()
returns the file size, if it has been set, and 0 otherwise.
\fB\%archive_entry_size\fP()
can be used to query that status.
\fB\%archive_entry_set_size\fP()
and
\fB\%archive_entry_unset_size\fP()
set and unset the size, respectively.
.PP
The number of references (hardlinks) can be obtained by calling
\fB\%archive_entry_nlinks\fP()
and set with
\fB\%archive_entry_set_nlinks\fP().
.SS Identifying unique files
The functions
\fB\%archive_entry_dev\fP()
and
\fB\%archive_entry_ino64\fP()
are used by
\fBarchive_entry_linkify\fP(3)
to find hardlinks.
The pair of device and inode is supposed to identify hardlinked files.
.PP
The device major and minor number can be obtained independently using
\fB\%archive_entry_devmajor\fP()
and
\fB\%archive_entry_devminor\fP().
The device can be set either via
\fB\%archive_entry_set_dev\fP()
or by the combination of major and minor number using
\fB\%archive_entry_set_devmajor\fP()
and
\fB\%archive_entry_set_devminor\fP().
.PP
The inode number can be obtained using
\fB\%archive_entry_ino\fP().
This is a legacy interface that uses the platform
Vt ino_t,
which may be very small.
To set the inode number,
\fB\%archive_entry_set_ino64\fP()
is the preferred interface.
.SS 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
\fB\%archive_device_rdev\fP()
and set with
\fB\%archive_device_set_rdev\fP().
The major and minor numbers are accessed by
\fB\%archive_device_rdevmajor\fP(),
\fB\%archive_device_rdevminor\fP()
\fB\%archive_device_set_rdevmajor\fP()
and
\fB\%archive_device_set_rdevminor\fP().
.PP
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.
.SH SEE ALSO
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\fBarchive_entry_acl\fP(3),
\fBarchive_entry_perms\fP(3),
\fBarchive_entry_time\fP(3),
\fBlibarchive\fP(3),
\fBstat\fP(2)